* KMSAN: uninit-value in IP6_ECN_decapsulate
@ 2018-09-20 20:54 syzbot
0 siblings, 0 replies; 2+ messages in thread
From: syzbot @ 2018-09-20 20:54 UTC (permalink / raw)
To: davem, kuznet, linux-kernel, netdev, syzkaller-bugs, yoshfuji
Hello,
syzbot found the following crash on:
HEAD commit: 88e0e95b30f1 kmsan: add a newline before "Uninit was creat..
git tree: https://github.com/google/kmsan.git/master
console output: https://syzkaller.appspot.com/x/log.txt?x=146dfccf800000
kernel config: https://syzkaller.appspot.com/x/.config?x=848e40757852af3e
dashboard link: https://syzkaller.appspot.com/bug?extid=bf7e6250c7ce248f3ec9
compiler: clang version 7.0.0 (trunk 334104)
syz repro: https://syzkaller.appspot.com/x/repro.syz?x=177a9ce4400000
C reproducer: https://syzkaller.appspot.com/x/repro.c?x=14f68bd8400000
IMPORTANT: if you fix the bug, please add the following tag to the commit:
Reported-by: syzbot+bf7e6250c7ce248f3ec9@syzkaller.appspotmail.com
IPv6: ADDRCONF(NETDEV_UP): veth1: link is not ready
IPv6: ADDRCONF(NETDEV_CHANGE): veth1: link becomes ready
IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready
8021q: adding VLAN 0 to HW filter on device team0
==================================================================
BUG: KMSAN: uninit-value in INET_ECN_decapsulate include/net/inet_ecn.h:189
[inline]
BUG: KMSAN: uninit-value in IP6_ECN_decapsulate+0x421/0x970
include/net/inet_ecn.h:234
CPU: 0 PID: 4515 Comm: syz-executor162 Not tainted 4.17.0+ #8
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS
Google 01/01/2011
Call Trace:
<IRQ>
__dump_stack lib/dump_stack.c:77 [inline]
dump_stack+0x185/0x1d0 lib/dump_stack.c:113
kmsan_report+0x188/0x2a0 mm/kmsan/kmsan.c:1122
__msan_warning_32+0x70/0xc0 mm/kmsan/kmsan_instr.c:620
INET_ECN_decapsulate include/net/inet_ecn.h:189 [inline]
IP6_ECN_decapsulate+0x421/0x970 include/net/inet_ecn.h:234
ip6ip6_dscp_ecn_decapsulate+0x1e0/0x250 net/ipv6/ip6_tunnel.c:719
__ip6_tnl_rcv+0xff9/0x1a10 net/ipv6/ip6_tunnel.c:829
ip6_tnl_rcv+0xe6/0x110 net/ipv6/ip6_tunnel.c:868
gre_rcv+0x1661/0x1a90 net/ipv6/ip6_gre.c:534
ip6_input_finish+0x1353/0x2260 net/ipv6/ip6_input.c:284
NF_HOOK include/linux/netfilter.h:288 [inline]
ip6_input+0x294/0x320 net/ipv6/ip6_input.c:327
dst_input include/net/dst.h:450 [inline]
ip6_rcv_finish+0x498/0x6e0 net/ipv6/ip6_input.c:71
NF_HOOK include/linux/netfilter.h:288 [inline]
ipv6_rcv+0x1d6b/0x2360 net/ipv6/ip6_input.c:208
__netif_receive_skb_core+0x47f3/0x4aa0 net/core/dev.c:4592
__netif_receive_skb net/core/dev.c:4657 [inline]
process_backlog+0x62d/0xe20 net/core/dev.c:5337
napi_poll net/core/dev.c:5735 [inline]
net_rx_action+0x766/0x1a80 net/core/dev.c:5801
__do_softirq+0x592/0x979 kernel/softirq.c:285
do_softirq_own_stack+0x2a/0x40 arch/x86/entry/entry_64.S:1046
</IRQ>
do_softirq kernel/softirq.c:329 [inline]
__local_bh_enable_ip+0x114/0x140 kernel/softirq.c:182
local_bh_enable+0x36/0x40 include/linux/bottom_half.h:32
rcu_read_unlock_bh include/linux/rcupdate.h:728 [inline]
ip6_finish_output2+0x1ce8/0x2100 net/ipv6/ip6_output.c:121
ip6_finish_output+0xaf0/0xbb0 net/ipv6/ip6_output.c:154
NF_HOOK_COND include/linux/netfilter.h:277 [inline]
ip6_output+0x597/0x6c0 net/ipv6/ip6_output.c:171
dst_output include/net/dst.h:444 [inline]
ip6_local_out+0x164/0x1d0 net/ipv6/output_core.c:176
ip6_send_skb net/ipv6/ip6_output.c:1703 [inline]
ip6_push_pending_frames+0x218/0x4d0 net/ipv6/ip6_output.c:1723
rawv6_push_pending_frames net/ipv6/raw.c:616 [inline]
rawv6_sendmsg+0x4254/0x4fc0 net/ipv6/raw.c:935
inet_sendmsg+0x3fc/0x760 net/ipv4/af_inet.c:798
sock_sendmsg_nosec net/socket.c:629 [inline]
sock_sendmsg net/socket.c:639 [inline]
sock_write_iter+0x3bc/0x470 net/socket.c:908
call_write_iter include/linux/fs.h:1784 [inline]
new_sync_write fs/read_write.c:474 [inline]
__vfs_write+0x808/0x9f0 fs/read_write.c:487
vfs_write+0x467/0x8c0 fs/read_write.c:549
ksys_write fs/read_write.c:598 [inline]
__do_sys_write fs/read_write.c:610 [inline]
__se_sys_write fs/read_write.c:607 [inline]
__x64_sys_write+0x1bf/0x3e0 fs/read_write.c:607
do_syscall_64+0x15b/0x230 arch/x86/entry/common.c:287
entry_SYSCALL_64_after_hwframe+0x44/0xa9
RIP: 0033:0x441199
RSP: 002b:00007fff83b55688 EFLAGS: 00000217 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 0000000000441199
RDX: 0000000000000004 RSI: 00000000200001c0 RDI: 0000000000000003
RBP: 00000000006cc018 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000217 R12: 00000000004020a0
R13: 0000000000402130 R14: 0000000000000000 R15: 0000000000000000
Uninit was created at:
kmsan_save_stack_with_flags mm/kmsan/kmsan.c:279 [inline]
kmsan_internal_poison_shadow+0xb8/0x1b0 mm/kmsan/kmsan.c:189
kmsan_kmalloc+0x94/0x100 mm/kmsan/kmsan.c:315
kmsan_slab_alloc+0x10/0x20 mm/kmsan/kmsan.c:322
slab_post_alloc_hook mm/slab.h:446 [inline]
slab_alloc_node mm/slub.c:2753 [inline]
__kmalloc_node_track_caller+0xb35/0x11b0 mm/slub.c:4395
__kmalloc_reserve net/core/skbuff.c:138 [inline]
__alloc_skb+0x2cb/0x9e0 net/core/skbuff.c:206
alloc_skb include/linux/skbuff.h:988 [inline]
__ip6_append_data+0x364d/0x4fb0 net/ipv6/ip6_output.c:1434
ip6_append_data+0x40e/0x6b0 net/ipv6/ip6_output.c:1597
rawv6_sendmsg+0x2756/0x4fc0 net/ipv6/raw.c:928
inet_sendmsg+0x3fc/0x760 net/ipv4/af_inet.c:798
sock_sendmsg_nosec net/socket.c:629 [inline]
sock_sendmsg net/socket.c:639 [inline]
sock_write_iter+0x3bc/0x470 net/socket.c:908
call_write_iter include/linux/fs.h:1784 [inline]
new_sync_write fs/read_write.c:474 [inline]
__vfs_write+0x808/0x9f0 fs/read_write.c:487
vfs_write+0x467/0x8c0 fs/read_write.c:549
ksys_write fs/read_write.c:598 [inline]
__do_sys_write fs/read_write.c:610 [inline]
__se_sys_write fs/read_write.c:607 [inline]
__x64_sys_write+0x1bf/0x3e0 fs/read_write.c:607
do_syscall_64+0x15b/0x230 arch/x86/entry/common.c:287
entry_SYSCALL_64_after_hwframe+0x44/0xa9
==================================================================
---
This bug is generated by a bot. It may contain errors.
See https://goo.gl/tpsmEJ for more information about syzbot.
syzbot engineers can be reached at syzkaller@googlegroups.com.
syzbot will keep track of this bug report. See:
https://goo.gl/tpsmEJ#bug-status-tracking for how to communicate with
syzbot.
syzbot can test patches for this bug, for details see:
https://goo.gl/tpsmEJ#testing-patches
^ permalink raw reply [flat|nested] 2+ messages in thread
* Re: KMSAN: uninit-value in IP6_ECN_decapsulate
@ 2023-12-24 2:36 xingwei lee
0 siblings, 0 replies; 2+ messages in thread
From: xingwei lee @ 2023-12-24 2:36 UTC (permalink / raw)
To: syzbot+bf7e6250c7ce248f3ec9
Cc: davem, Alexey Kuznetsov, linux-kernel, netdev, syzkaller-bugs,
yoshfuji, Eric Dumazet, kuba, pabeni
Hello, I reproduced this bug and comfired in the latest net tree.
Since I notice this is no stable reproducer in the syzbot dashboard.
If you fix this issue, please add the following tag to the commit:
Reported-by: xingwei lee <xrivendell7@gmail.com>
kernel: net 7c5e046bdcb2513f9decb3765d8bf92d604279cf
kernel config: https://syzkaller.appspot.com/text?tag=KernelConfig&x=4a65fa9f077ead01
with KMSAN enabled
compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40
BUG: KMSAN: uninit-value in __INET_ECN_decapsulate
include/net/inet_ecn.h:253 [inline]
BUG: KMSAN: uninit-value in INET_ECN_decapsulate
include/net/inet_ecn.h:275 [inline]
BUG: KMSAN: uninit-value in IP6_ECN_decapsulate+0x7e0/0x1e10
include/net/inet_ecn.h:321
__INET_ECN_decapsulate include/net/inet_ecn.h:253 [inline]
INET_ECN_decapsulate include/net/inet_ecn.h:275 [inline]
IP6_ECN_decapsulate+0x7e0/0x1e10 include/net/inet_ecn.h:321
ip6ip6_dscp_ecn_decapsulate+0x16f/0x1b0 net/ipv6/ip6_tunnel.c:727
__ip6_tnl_rcv+0xce4/0x1540 net/ipv6/ip6_tunnel.c:845
ip6_tnl_rcv+0xc0/0x100 net/ipv6/ip6_tunnel.c:888
gre_rcv+0x1493/0x18f0
ip6_protocol_deliver_rcu+0xc97/0x2970 net/ipv6/ip6_input.c:438
ip6_input_finish net/ipv6/ip6_input.c:483 [inline]
NF_HOOK include/linux/netfilter.h:314 [inline]
ip6_input+0x14c/0x450 net/ipv6/ip6_input.c:492
ip6_mc_input+0x76a/0xc90 net/ipv6/ip6_input.c:586
dst_input include/net/dst.h:461 [inline]
ip6_rcv_finish+0x57f/0x860 net/ipv6/ip6_input.c:79
NF_HOOK include/linux/netfilter.h:314 [inline]
ipv6_rcv+0xf1/0x3b0 net/ipv6/ip6_input.c:310
__netif_receive_skb_one_core net/core/dev.c:5532 [inline]
__netif_receive_skb+0x1a9/0x5d0 net/core/dev.c:5646
netif_receive_skb_internal net/core/dev.c:5732 [inline]
netif_receive_skb+0x57/0x680 net/core/dev.c:5791
tun_rx_batched+0x1dd/0x980 drivers/net/tun.c:1555
tun_get_user+0x52d2/0x66c0 drivers/net/tun.c:2002
tun_chr_write_iter+0x3bf/0x5c0 drivers/net/tun.c:2048
call_write_iter include/linux/fs.h:2020 [inline]
new_sync_write fs/read_write.c:491 [inline]
vfs_write+0x92c/0x13f0 fs/read_write.c:584
ksys_write+0x1f3/0x4a0 fs/read_write.c:637
__do_sys_write fs/read_write.c:649 [inline]
__se_sys_write fs/read_write.c:646 [inline]
__x64_sys_write+0x97/0xf0 fs/read_write.c:646
do_syscall_x64 arch/x86/entry/common.c:52 [inline]
do_syscall_64+0x44/0x110 arch/x86/entry/common.c:83
entry_SYSCALL_64_after_hwframe+0x63/0x6b
Uninit was created at:
slab_post_alloc_hook+0x103/0x9e0 mm/slab.h:768
slab_alloc_node mm/slub.c:3478 [inline]
kmem_cache_alloc_node+0x5f7/0xb50 mm/slub.c:3523
kmalloc_reserve+0x13c/0x4a0 net/core/skbuff.c:560
__alloc_skb+0x2fd/0x770 net/core/skbuff.c:651
alloc_skb include/linux/skbuff.h:1286 [inline]
alloc_skb_with_frags+0xcc/0x990 net/core/skbuff.c:6334
sock_alloc_send_pskb+0xa65/0xbe0 net/core/sock.c:2780
tun_alloc_skb drivers/net/tun.c:1531 [inline]
tun_get_user+0x1f8b/0x66c0 drivers/net/tun.c:1846
tun_chr_write_iter+0x3bf/0x5c0 drivers/net/tun.c:2048
call_write_iter include/linux/fs.h:2020 [inline]
new_sync_write fs/read_write.c:491 [inline]
vfs_write+0x92c/0x13f0 fs/read_write.c:584
ksys_write+0x1f3/0x4a0 fs/read_write.c:637
__do_sys_write fs/read_write.c:649 [inline]
__se_sys_write fs/read_write.c:646 [inline]
__x64_sys_write+0x97/0xf0 fs/read_write.c:646
do_syscall_x64 arch/x86/entry/common.c:52 [inline]
do_syscall_64+0x44/0x110 arch/x86/entry/common.c:83
entry_SYSCALL_64_after_hwframe+0x63/0x6b
CPU: 0 PID: 8668 Comm: 6fe Not tainted 6.7.0-rc6-00157-g7c5e046bdcb2 #9
Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS
1.16.2-1.fc38 04/01/2014
=====================================================
=* repro.c =*
// autogenerated by syzkaller (https://github.com/google/syzkaller)
#define _GNU_SOURCE
#include <arpa/inet.h>
#include <dirent.h>
#include <endian.h>
#include <errno.h>
#include <fcntl.h>
#include <linux/capability.h>
#include <linux/genetlink.h>
#include <linux/if_addr.h>
#include <linux/if_ether.h>
#include <linux/if_link.h>
#include <linux/if_tun.h>
#include <linux/in6.h>
#include <linux/ip.h>
#include <linux/neighbour.h>
#include <linux/net.h>
#include <linux/netlink.h>
#include <linux/rtnetlink.h>
#include <linux/tcp.h>
#include <linux/veth.h>
#include <net/if.h>
#include <net/if_arp.h>
#include <netinet/in.h>
#include <sched.h>
#include <signal.h>
#include <stdarg.h>
#include <stdbool.h>
#include <stdint.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <sys/ioctl.h>
#include <sys/mount.h>
#include <sys/prctl.h>
#include <sys/resource.h>
#include <sys/socket.h>
#include <sys/stat.h>
#include <sys/syscall.h>
#include <sys/time.h>
#include <sys/types.h>
#include <sys/uio.h>
#include <sys/wait.h>
#include <time.h>
#include <unistd.h>
static unsigned long long procid;
static void sleep_ms(uint64_t ms) { usleep(ms * 1000); }
static uint64_t current_time_ms(void) {
struct timespec ts;
if (clock_gettime(CLOCK_MONOTONIC, &ts)) exit(1);
return (uint64_t)ts.tv_sec * 1000 + (uint64_t)ts.tv_nsec / 1000000;
}
static bool write_file(const char* file, const char* what, ...) {
char buf[1024];
va_list args;
va_start(args, what);
vsnprintf(buf, sizeof(buf), what, args);
va_end(args);
buf[sizeof(buf) - 1] = 0;
int len = strlen(buf);
int fd = open(file, O_WRONLY | O_CLOEXEC);
if (fd == -1) return false;
if (write(fd, buf, len) != len) {
int err = errno;
close(fd);
errno = err;
return false;
}
close(fd);
return true;
}
struct nlmsg {
char* pos;
int nesting;
struct nlattr* nested[8];
char buf[4096];
};
static void netlink_init(struct nlmsg* nlmsg, int typ, int flags,
const void* data, int size) {
memset(nlmsg, 0, sizeof(*nlmsg));
struct nlmsghdr* hdr = (struct nlmsghdr*)nlmsg->buf;
hdr->nlmsg_type = typ;
hdr->nlmsg_flags = NLM_F_REQUEST | NLM_F_ACK | flags;
memcpy(hdr + 1, data, size);
nlmsg->pos = (char*)(hdr + 1) + NLMSG_ALIGN(size);
}
static void netlink_attr(struct nlmsg* nlmsg, int typ, const void* data,
int size) {
struct nlattr* attr = (struct nlattr*)nlmsg->pos;
attr->nla_len = sizeof(*attr) + size;
attr->nla_type = typ;
if (size > 0) memcpy(attr + 1, data, size);
nlmsg->pos += NLMSG_ALIGN(attr->nla_len);
}
static void netlink_nest(struct nlmsg* nlmsg, int typ) {
struct nlattr* attr = (struct nlattr*)nlmsg->pos;
attr->nla_type = typ;
nlmsg->pos += sizeof(*attr);
nlmsg->nested[nlmsg->nesting++] = attr;
}
static void netlink_done(struct nlmsg* nlmsg) {
struct nlattr* attr = nlmsg->nested[--nlmsg->nesting];
attr->nla_len = nlmsg->pos - (char*)attr;
}
static int netlink_send_ext(struct nlmsg* nlmsg, int sock, uint16_t reply_type,
int* reply_len, bool dofail) {
if (nlmsg->pos > nlmsg->buf + sizeof(nlmsg->buf) || nlmsg->nesting) exit(1);
struct nlmsghdr* hdr = (struct nlmsghdr*)nlmsg->buf;
hdr->nlmsg_len = nlmsg->pos - nlmsg->buf;
struct sockaddr_nl addr;
memset(&addr, 0, sizeof(addr));
addr.nl_family = AF_NETLINK;
ssize_t n = sendto(sock, nlmsg->buf, hdr->nlmsg_len, 0,
(struct sockaddr*)&addr, sizeof(addr));
if (n != (ssize_t)hdr->nlmsg_len) {
if (dofail) exit(1);
return -1;
}
n = recv(sock, nlmsg->buf, sizeof(nlmsg->buf), 0);
if (reply_len) *reply_len = 0;
if (n < 0) {
if (dofail) exit(1);
return -1;
}
if (n < (ssize_t)sizeof(struct nlmsghdr)) {
errno = EINVAL;
if (dofail) exit(1);
return -1;
}
if (hdr->nlmsg_type == NLMSG_DONE) return 0;
if (reply_len && hdr->nlmsg_type == reply_type) {
*reply_len = n;
return 0;
}
if (n < (ssize_t)(sizeof(struct nlmsghdr) + sizeof(struct nlmsgerr))) {
errno = EINVAL;
if (dofail) exit(1);
return -1;
}
if (hdr->nlmsg_type != NLMSG_ERROR) {
errno = EINVAL;
if (dofail) exit(1);
return -1;
}
errno = -((struct nlmsgerr*)(hdr + 1))->error;
return -errno;
}
static int netlink_send(struct nlmsg* nlmsg, int sock) {
return netlink_send_ext(nlmsg, sock, 0, NULL, true);
}
static int netlink_query_family_id(struct nlmsg* nlmsg, int sock,
const char* family_name, bool dofail) {
struct genlmsghdr genlhdr;
memset(&genlhdr, 0, sizeof(genlhdr));
genlhdr.cmd = CTRL_CMD_GETFAMILY;
netlink_init(nlmsg, GENL_ID_CTRL, 0, &genlhdr, sizeof(genlhdr));
netlink_attr(nlmsg, CTRL_ATTR_FAMILY_NAME, family_name,
strnlen(family_name, GENL_NAMSIZ - 1) + 1);
int n = 0;
int err = netlink_send_ext(nlmsg, sock, GENL_ID_CTRL, &n, dofail);
if (err < 0) {
return -1;
}
uint16_t id = 0;
struct nlattr* attr = (struct nlattr*)(nlmsg->buf + NLMSG_HDRLEN +
NLMSG_ALIGN(sizeof(genlhdr)));
for (; (char*)attr < nlmsg->buf + n;
attr = (struct nlattr*)((char*)attr + NLMSG_ALIGN(attr->nla_len))) {
if (attr->nla_type == CTRL_ATTR_FAMILY_ID) {
id = *(uint16_t*)(attr + 1);
break;
}
}
if (!id) {
errno = EINVAL;
return -1;
}
recv(sock, nlmsg->buf, sizeof(nlmsg->buf), 0);
return id;
}
static int netlink_next_msg(struct nlmsg* nlmsg, unsigned int offset,
unsigned int total_len) {
struct nlmsghdr* hdr = (struct nlmsghdr*)(nlmsg->buf + offset);
if (offset == total_len || offset + hdr->nlmsg_len > total_len) return -1;
return hdr->nlmsg_len;
}
static void netlink_add_device_impl(struct nlmsg* nlmsg, const char* type,
const char* name, bool up) {
struct ifinfomsg hdr;
memset(&hdr, 0, sizeof(hdr));
if (up) hdr.ifi_flags = hdr.ifi_change = IFF_UP;
netlink_init(nlmsg, RTM_NEWLINK, NLM_F_EXCL | NLM_F_CREATE, &hdr,
sizeof(hdr));
if (name) netlink_attr(nlmsg, IFLA_IFNAME, name, strlen(name));
netlink_nest(nlmsg, IFLA_LINKINFO);
netlink_attr(nlmsg, IFLA_INFO_KIND, type, strlen(type));
}
static void netlink_add_device(struct nlmsg* nlmsg, int sock, const char* type,
const char* name) {
netlink_add_device_impl(nlmsg, type, name, false);
netlink_done(nlmsg);
int err = netlink_send(nlmsg, sock);
if (err < 0) {
}
}
static void netlink_add_veth(struct nlmsg* nlmsg, int sock, const char* name,
const char* peer) {
netlink_add_device_impl(nlmsg, "veth", name, false);
netlink_nest(nlmsg, IFLA_INFO_DATA);
netlink_nest(nlmsg, VETH_INFO_PEER);
nlmsg->pos += sizeof(struct ifinfomsg);
netlink_attr(nlmsg, IFLA_IFNAME, peer, strlen(peer));
netlink_done(nlmsg);
netlink_done(nlmsg);
netlink_done(nlmsg);
int err = netlink_send(nlmsg, sock);
if (err < 0) {
}
}
static void netlink_add_xfrm(struct nlmsg* nlmsg, int sock, const char* name) {
netlink_add_device_impl(nlmsg, "xfrm", name, true);
netlink_nest(nlmsg, IFLA_INFO_DATA);
int if_id = 1;
netlink_attr(nlmsg, 2, &if_id, sizeof(if_id));
netlink_done(nlmsg);
netlink_done(nlmsg);
int err = netlink_send(nlmsg, sock);
if (err < 0) {
}
}
static void netlink_add_hsr(struct nlmsg* nlmsg, int sock, const char* name,
const char* slave1, const char* slave2) {
netlink_add_device_impl(nlmsg, "hsr", name, false);
netlink_nest(nlmsg, IFLA_INFO_DATA);
int ifindex1 = if_nametoindex(slave1);
netlink_attr(nlmsg, IFLA_HSR_SLAVE1, &ifindex1, sizeof(ifindex1));
int ifindex2 = if_nametoindex(slave2);
netlink_attr(nlmsg, IFLA_HSR_SLAVE2, &ifindex2, sizeof(ifindex2));
netlink_done(nlmsg);
netlink_done(nlmsg);
int err = netlink_send(nlmsg, sock);
if (err < 0) {
}
}
static void netlink_add_linked(struct nlmsg* nlmsg, int sock, const char* type,
const char* name, const char* link) {
netlink_add_device_impl(nlmsg, type, name, false);
netlink_done(nlmsg);
int ifindex = if_nametoindex(link);
netlink_attr(nlmsg, IFLA_LINK, &ifindex, sizeof(ifindex));
int err = netlink_send(nlmsg, sock);
if (err < 0) {
}
}
static void netlink_add_vlan(struct nlmsg* nlmsg, int sock, const char* name,
const char* link, uint16_t id, uint16_t proto) {
netlink_add_device_impl(nlmsg, "vlan", name, false);
netlink_nest(nlmsg, IFLA_INFO_DATA);
netlink_attr(nlmsg, IFLA_VLAN_ID, &id, sizeof(id));
netlink_attr(nlmsg, IFLA_VLAN_PROTOCOL, &proto, sizeof(proto));
netlink_done(nlmsg);
netlink_done(nlmsg);
int ifindex = if_nametoindex(link);
netlink_attr(nlmsg, IFLA_LINK, &ifindex, sizeof(ifindex));
int err = netlink_send(nlmsg, sock);
if (err < 0) {
}
}
static void netlink_add_macvlan(struct nlmsg* nlmsg, int sock, const char* name,
const char* link) {
netlink_add_device_impl(nlmsg, "macvlan", name, false);
netlink_nest(nlmsg, IFLA_INFO_DATA);
uint32_t mode = MACVLAN_MODE_BRIDGE;
netlink_attr(nlmsg, IFLA_MACVLAN_MODE, &mode, sizeof(mode));
netlink_done(nlmsg);
netlink_done(nlmsg);
int ifindex = if_nametoindex(link);
netlink_attr(nlmsg, IFLA_LINK, &ifindex, sizeof(ifindex));
int err = netlink_send(nlmsg, sock);
if (err < 0) {
}
}
static void netlink_add_geneve(struct nlmsg* nlmsg, int sock, const char* name,
uint32_t vni, struct in_addr* addr4,
struct in6_addr* addr6) {
netlink_add_device_impl(nlmsg, "geneve", name, false);
netlink_nest(nlmsg, IFLA_INFO_DATA);
netlink_attr(nlmsg, IFLA_GENEVE_ID, &vni, sizeof(vni));
if (addr4) netlink_attr(nlmsg, IFLA_GENEVE_REMOTE, addr4, sizeof(*addr4));
if (addr6) netlink_attr(nlmsg, IFLA_GENEVE_REMOTE6, addr6, sizeof(*addr6));
netlink_done(nlmsg);
netlink_done(nlmsg);
int err = netlink_send(nlmsg, sock);
if (err < 0) {
}
}
#define IFLA_IPVLAN_FLAGS 2
#define IPVLAN_MODE_L3S 2
#undef IPVLAN_F_VEPA
#define IPVLAN_F_VEPA 2
static void netlink_add_ipvlan(struct nlmsg* nlmsg, int sock, const char* name,
const char* link, uint16_t mode,
uint16_t flags) {
netlink_add_device_impl(nlmsg, "ipvlan", name, false);
netlink_nest(nlmsg, IFLA_INFO_DATA);
netlink_attr(nlmsg, IFLA_IPVLAN_MODE, &mode, sizeof(mode));
netlink_attr(nlmsg, IFLA_IPVLAN_FLAGS, &flags, sizeof(flags));
netlink_done(nlmsg);
netlink_done(nlmsg);
int ifindex = if_nametoindex(link);
netlink_attr(nlmsg, IFLA_LINK, &ifindex, sizeof(ifindex));
int err = netlink_send(nlmsg, sock);
if (err < 0) {
}
}
static void netlink_device_change(struct nlmsg* nlmsg, int sock,
const char* name, bool up, const char* master,
const void* mac, int macsize,
const char* new_name) {
struct ifinfomsg hdr;
memset(&hdr, 0, sizeof(hdr));
if (up) hdr.ifi_flags = hdr.ifi_change = IFF_UP;
hdr.ifi_index = if_nametoindex(name);
netlink_init(nlmsg, RTM_NEWLINK, 0, &hdr, sizeof(hdr));
if (new_name) netlink_attr(nlmsg, IFLA_IFNAME, new_name, strlen(new_name));
if (master) {
int ifindex = if_nametoindex(master);
netlink_attr(nlmsg, IFLA_MASTER, &ifindex, sizeof(ifindex));
}
if (macsize) netlink_attr(nlmsg, IFLA_ADDRESS, mac, macsize);
int err = netlink_send(nlmsg, sock);
if (err < 0) {
}
}
static int netlink_add_addr(struct nlmsg* nlmsg, int sock, const char* dev,
const void* addr, int addrsize) {
struct ifaddrmsg hdr;
memset(&hdr, 0, sizeof(hdr));
hdr.ifa_family = addrsize == 4 ? AF_INET : AF_INET6;
hdr.ifa_prefixlen = addrsize == 4 ? 24 : 120;
hdr.ifa_scope = RT_SCOPE_UNIVERSE;
hdr.ifa_index = if_nametoindex(dev);
netlink_init(nlmsg, RTM_NEWADDR, NLM_F_CREATE | NLM_F_REPLACE, &hdr,
sizeof(hdr));
netlink_attr(nlmsg, IFA_LOCAL, addr, addrsize);
netlink_attr(nlmsg, IFA_ADDRESS, addr, addrsize);
return netlink_send(nlmsg, sock);
}
static void netlink_add_addr4(struct nlmsg* nlmsg, int sock, const char* dev,
const char* addr) {
struct in_addr in_addr;
inet_pton(AF_INET, addr, &in_addr);
int err = netlink_add_addr(nlmsg, sock, dev, &in_addr, sizeof(in_addr));
if (err < 0) {
}
}
static void netlink_add_addr6(struct nlmsg* nlmsg, int sock, const char* dev,
const char* addr) {
struct in6_addr in6_addr;
inet_pton(AF_INET6, addr, &in6_addr);
int err = netlink_add_addr(nlmsg, sock, dev, &in6_addr, sizeof(in6_addr));
if (err < 0) {
}
}
static struct nlmsg nlmsg;
#define DEVLINK_FAMILY_NAME "devlink"
#define DEVLINK_CMD_PORT_GET 5
#define DEVLINK_ATTR_BUS_NAME 1
#define DEVLINK_ATTR_DEV_NAME 2
#define DEVLINK_ATTR_NETDEV_NAME 7
static struct nlmsg nlmsg2;
static void initialize_devlink_ports(const char* bus_name, const char* dev_name,
const char* netdev_prefix) {
struct genlmsghdr genlhdr;
int len, total_len, id, err, offset;
uint16_t netdev_index;
int sock = socket(AF_NETLINK, SOCK_RAW, NETLINK_GENERIC);
if (sock == -1) exit(1);
int rtsock = socket(AF_NETLINK, SOCK_RAW, NETLINK_ROUTE);
if (rtsock == -1) exit(1);
id = netlink_query_family_id(&nlmsg, sock, DEVLINK_FAMILY_NAME, true);
if (id == -1) goto error;
memset(&genlhdr, 0, sizeof(genlhdr));
genlhdr.cmd = DEVLINK_CMD_PORT_GET;
netlink_init(&nlmsg, id, NLM_F_DUMP, &genlhdr, sizeof(genlhdr));
netlink_attr(&nlmsg, DEVLINK_ATTR_BUS_NAME, bus_name, strlen(bus_name) + 1);
netlink_attr(&nlmsg, DEVLINK_ATTR_DEV_NAME, dev_name, strlen(dev_name) + 1);
err = netlink_send_ext(&nlmsg, sock, id, &total_len, true);
if (err < 0) {
goto error;
}
offset = 0;
netdev_index = 0;
while ((len = netlink_next_msg(&nlmsg, offset, total_len)) != -1) {
struct nlattr* attr = (struct nlattr*)(nlmsg.buf + offset + NLMSG_HDRLEN +
NLMSG_ALIGN(sizeof(genlhdr)));
for (; (char*)attr < nlmsg.buf + offset + len;
attr = (struct nlattr*)((char*)attr + NLMSG_ALIGN(attr->nla_len))) {
if (attr->nla_type == DEVLINK_ATTR_NETDEV_NAME) {
char* port_name;
char netdev_name[IFNAMSIZ];
port_name = (char*)(attr + 1);
snprintf(netdev_name, sizeof(netdev_name), "%s%d", netdev_prefix,
netdev_index);
netlink_device_change(&nlmsg2, rtsock, port_name, true, 0, 0, 0,
netdev_name);
break;
}
}
offset += len;
netdev_index++;
}
error:
close(rtsock);
close(sock);
}
#define DEV_IPV4 "172.20.20.%d"
#define DEV_IPV6 "fe80::%02x"
#define DEV_MAC 0x00aaaaaaaaaa
static void netdevsim_add(unsigned int addr, unsigned int port_count) {
write_file("/sys/bus/netdevsim/del_device", "%u", addr);
if (write_file("/sys/bus/netdevsim/new_device", "%u %u", addr, port_count)) {
char buf[32];
snprintf(buf, sizeof(buf), "netdevsim%d", addr);
initialize_devlink_ports("netdevsim", buf, "netdevsim");
}
}
#define WG_GENL_NAME "wireguard"
enum wg_cmd {
WG_CMD_GET_DEVICE,
WG_CMD_SET_DEVICE,
};
enum wgdevice_attribute {
WGDEVICE_A_UNSPEC,
WGDEVICE_A_IFINDEX,
WGDEVICE_A_IFNAME,
WGDEVICE_A_PRIVATE_KEY,
WGDEVICE_A_PUBLIC_KEY,
WGDEVICE_A_FLAGS,
WGDEVICE_A_LISTEN_PORT,
WGDEVICE_A_FWMARK,
WGDEVICE_A_PEERS,
};
enum wgpeer_attribute {
WGPEER_A_UNSPEC,
WGPEER_A_PUBLIC_KEY,
WGPEER_A_PRESHARED_KEY,
WGPEER_A_FLAGS,
WGPEER_A_ENDPOINT,
WGPEER_A_PERSISTENT_KEEPALIVE_INTERVAL,
WGPEER_A_LAST_HANDSHAKE_TIME,
WGPEER_A_RX_BYTES,
WGPEER_A_TX_BYTES,
WGPEER_A_ALLOWEDIPS,
WGPEER_A_PROTOCOL_VERSION,
};
enum wgallowedip_attribute {
WGALLOWEDIP_A_UNSPEC,
WGALLOWEDIP_A_FAMILY,
WGALLOWEDIP_A_IPADDR,
WGALLOWEDIP_A_CIDR_MASK,
};
static void netlink_wireguard_setup(void) {
const char ifname_a[] = "wg0";
const char ifname_b[] = "wg1";
const char ifname_c[] = "wg2";
const char private_a[] =
"\xa0\x5c\xa8\x4f\x6c\x9c\x8e\x38\x53\xe2\xfd\x7a\x70\xae\x0f\xb2\x0f\xa1"
"\x52\x60\x0c\xb0\x08\x45\x17\x4f\x08\x07\x6f\x8d\x78\x43";
const char private_b[] =
"\xb0\x80\x73\xe8\xd4\x4e\x91\xe3\xda\x92\x2c\x22\x43\x82\x44\xbb\x88\x5c"
"\x69\xe2\x69\xc8\xe9\xd8\x35\xb1\x14\x29\x3a\x4d\xdc\x6e";
const char private_c[] =
"\xa0\xcb\x87\x9a\x47\xf5\xbc\x64\x4c\x0e\x69\x3f\xa6\xd0\x31\xc7\x4a\x15"
"\x53\xb6\xe9\x01\xb9\xff\x2f\x51\x8c\x78\x04\x2f\xb5\x42";
const char public_a[] =
"\x97\x5c\x9d\x81\xc9\x83\xc8\x20\x9e\xe7\x81\x25\x4b\x89\x9f\x8e\xd9\x25"
"\xae\x9f\x09\x23\xc2\x3c\x62\xf5\x3c\x57\xcd\xbf\x69\x1c";
const char public_b[] =
"\xd1\x73\x28\x99\xf6\x11\xcd\x89\x94\x03\x4d\x7f\x41\x3d\xc9\x57\x63\x0e"
"\x54\x93\xc2\x85\xac\xa4\x00\x65\xcb\x63\x11\xbe\x69\x6b";
const char public_c[] =
"\xf4\x4d\xa3\x67\xa8\x8e\xe6\x56\x4f\x02\x02\x11\x45\x67\x27\x08\x2f\x5c"
"\xeb\xee\x8b\x1b\xf5\xeb\x73\x37\x34\x1b\x45\x9b\x39\x22";
const uint16_t listen_a = 20001;
const uint16_t listen_b = 20002;
const uint16_t listen_c = 20003;
const uint16_t af_inet = AF_INET;
const uint16_t af_inet6 = AF_INET6;
const struct sockaddr_in endpoint_b_v4 = {
.sin_family = AF_INET,
.sin_port = htons(listen_b),
.sin_addr = {htonl(INADDR_LOOPBACK)}};
const struct sockaddr_in endpoint_c_v4 = {
.sin_family = AF_INET,
.sin_port = htons(listen_c),
.sin_addr = {htonl(INADDR_LOOPBACK)}};
struct sockaddr_in6 endpoint_a_v6 = {.sin6_family = AF_INET6,
.sin6_port = htons(listen_a)};
endpoint_a_v6.sin6_addr = in6addr_loopback;
struct sockaddr_in6 endpoint_c_v6 = {.sin6_family = AF_INET6,
.sin6_port = htons(listen_c)};
endpoint_c_v6.sin6_addr = in6addr_loopback;
const struct in_addr first_half_v4 = {0};
const struct in_addr second_half_v4 = {(uint32_t)htonl(128 << 24)};
const struct in6_addr first_half_v6 = {{{0}}};
const struct in6_addr second_half_v6 = {{{0x80}}};
const uint8_t half_cidr = 1;
const uint16_t persistent_keepalives[] = {1, 3, 7, 9, 14, 19};
struct genlmsghdr genlhdr = {.cmd = WG_CMD_SET_DEVICE, .version = 1};
int sock;
int id, err;
sock = socket(AF_NETLINK, SOCK_RAW, NETLINK_GENERIC);
if (sock == -1) {
return;
}
id = netlink_query_family_id(&nlmsg, sock, WG_GENL_NAME, true);
if (id == -1) goto error;
netlink_init(&nlmsg, id, 0, &genlhdr, sizeof(genlhdr));
netlink_attr(&nlmsg, WGDEVICE_A_IFNAME, ifname_a, strlen(ifname_a) + 1);
netlink_attr(&nlmsg, WGDEVICE_A_PRIVATE_KEY, private_a, 32);
netlink_attr(&nlmsg, WGDEVICE_A_LISTEN_PORT, &listen_a, 2);
netlink_nest(&nlmsg, NLA_F_NESTED | WGDEVICE_A_PEERS);
netlink_nest(&nlmsg, NLA_F_NESTED | 0);
netlink_attr(&nlmsg, WGPEER_A_PUBLIC_KEY, public_b, 32);
netlink_attr(&nlmsg, WGPEER_A_ENDPOINT, &endpoint_b_v4,
sizeof(endpoint_b_v4));
netlink_attr(&nlmsg, WGPEER_A_PERSISTENT_KEEPALIVE_INTERVAL,
&persistent_keepalives[0], 2);
netlink_nest(&nlmsg, NLA_F_NESTED | WGPEER_A_ALLOWEDIPS);
netlink_nest(&nlmsg, NLA_F_NESTED | 0);
netlink_attr(&nlmsg, WGALLOWEDIP_A_FAMILY, &af_inet, 2);
netlink_attr(&nlmsg, WGALLOWEDIP_A_IPADDR, &first_half_v4,
sizeof(first_half_v4));
netlink_attr(&nlmsg, WGALLOWEDIP_A_CIDR_MASK, &half_cidr, 1);
netlink_done(&nlmsg);
netlink_nest(&nlmsg, NLA_F_NESTED | 0);
netlink_attr(&nlmsg, WGALLOWEDIP_A_FAMILY, &af_inet6, 2);
netlink_attr(&nlmsg, WGALLOWEDIP_A_IPADDR, &first_half_v6,
sizeof(first_half_v6));
netlink_attr(&nlmsg, WGALLOWEDIP_A_CIDR_MASK, &half_cidr, 1);
netlink_done(&nlmsg);
netlink_done(&nlmsg);
netlink_done(&nlmsg);
netlink_nest(&nlmsg, NLA_F_NESTED | 0);
netlink_attr(&nlmsg, WGPEER_A_PUBLIC_KEY, public_c, 32);
netlink_attr(&nlmsg, WGPEER_A_ENDPOINT, &endpoint_c_v6,
sizeof(endpoint_c_v6));
netlink_attr(&nlmsg, WGPEER_A_PERSISTENT_KEEPALIVE_INTERVAL,
&persistent_keepalives[1], 2);
netlink_nest(&nlmsg, NLA_F_NESTED | WGPEER_A_ALLOWEDIPS);
netlink_nest(&nlmsg, NLA_F_NESTED | 0);
netlink_attr(&nlmsg, WGALLOWEDIP_A_FAMILY, &af_inet, 2);
netlink_attr(&nlmsg, WGALLOWEDIP_A_IPADDR, &second_half_v4,
sizeof(second_half_v4));
netlink_attr(&nlmsg, WGALLOWEDIP_A_CIDR_MASK, &half_cidr, 1);
netlink_done(&nlmsg);
netlink_nest(&nlmsg, NLA_F_NESTED | 0);
netlink_attr(&nlmsg, WGALLOWEDIP_A_FAMILY, &af_inet6, 2);
netlink_attr(&nlmsg, WGALLOWEDIP_A_IPADDR, &second_half_v6,
sizeof(second_half_v6));
netlink_attr(&nlmsg, WGALLOWEDIP_A_CIDR_MASK, &half_cidr, 1);
netlink_done(&nlmsg);
netlink_done(&nlmsg);
netlink_done(&nlmsg);
netlink_done(&nlmsg);
err = netlink_send(&nlmsg, sock);
if (err < 0) {
}
netlink_init(&nlmsg, id, 0, &genlhdr, sizeof(genlhdr));
netlink_attr(&nlmsg, WGDEVICE_A_IFNAME, ifname_b, strlen(ifname_b) + 1);
netlink_attr(&nlmsg, WGDEVICE_A_PRIVATE_KEY, private_b, 32);
netlink_attr(&nlmsg, WGDEVICE_A_LISTEN_PORT, &listen_b, 2);
netlink_nest(&nlmsg, NLA_F_NESTED | WGDEVICE_A_PEERS);
netlink_nest(&nlmsg, NLA_F_NESTED | 0);
netlink_attr(&nlmsg, WGPEER_A_PUBLIC_KEY, public_a, 32);
netlink_attr(&nlmsg, WGPEER_A_ENDPOINT, &endpoint_a_v6,
sizeof(endpoint_a_v6));
netlink_attr(&nlmsg, WGPEER_A_PERSISTENT_KEEPALIVE_INTERVAL,
&persistent_keepalives[2], 2);
netlink_nest(&nlmsg, NLA_F_NESTED | WGPEER_A_ALLOWEDIPS);
netlink_nest(&nlmsg, NLA_F_NESTED | 0);
netlink_attr(&nlmsg, WGALLOWEDIP_A_FAMILY, &af_inet, 2);
netlink_attr(&nlmsg, WGALLOWEDIP_A_IPADDR, &first_half_v4,
sizeof(first_half_v4));
netlink_attr(&nlmsg, WGALLOWEDIP_A_CIDR_MASK, &half_cidr, 1);
netlink_done(&nlmsg);
netlink_nest(&nlmsg, NLA_F_NESTED | 0);
netlink_attr(&nlmsg, WGALLOWEDIP_A_FAMILY, &af_inet6, 2);
netlink_attr(&nlmsg, WGALLOWEDIP_A_IPADDR, &first_half_v6,
sizeof(first_half_v6));
netlink_attr(&nlmsg, WGALLOWEDIP_A_CIDR_MASK, &half_cidr, 1);
netlink_done(&nlmsg);
netlink_done(&nlmsg);
netlink_done(&nlmsg);
netlink_nest(&nlmsg, NLA_F_NESTED | 0);
netlink_attr(&nlmsg, WGPEER_A_PUBLIC_KEY, public_c, 32);
netlink_attr(&nlmsg, WGPEER_A_ENDPOINT, &endpoint_c_v4,
sizeof(endpoint_c_v4));
netlink_attr(&nlmsg, WGPEER_A_PERSISTENT_KEEPALIVE_INTERVAL,
&persistent_keepalives[3], 2);
netlink_nest(&nlmsg, NLA_F_NESTED | WGPEER_A_ALLOWEDIPS);
netlink_nest(&nlmsg, NLA_F_NESTED | 0);
netlink_attr(&nlmsg, WGALLOWEDIP_A_FAMILY, &af_inet, 2);
netlink_attr(&nlmsg, WGALLOWEDIP_A_IPADDR, &second_half_v4,
sizeof(second_half_v4));
netlink_attr(&nlmsg, WGALLOWEDIP_A_CIDR_MASK, &half_cidr, 1);
netlink_done(&nlmsg);
netlink_nest(&nlmsg, NLA_F_NESTED | 0);
netlink_attr(&nlmsg, WGALLOWEDIP_A_FAMILY, &af_inet6, 2);
netlink_attr(&nlmsg, WGALLOWEDIP_A_IPADDR, &second_half_v6,
sizeof(second_half_v6));
netlink_attr(&nlmsg, WGALLOWEDIP_A_CIDR_MASK, &half_cidr, 1);
netlink_done(&nlmsg);
netlink_done(&nlmsg);
netlink_done(&nlmsg);
netlink_done(&nlmsg);
err = netlink_send(&nlmsg, sock);
if (err < 0) {
}
netlink_init(&nlmsg, id, 0, &genlhdr, sizeof(genlhdr));
netlink_attr(&nlmsg, WGDEVICE_A_IFNAME, ifname_c, strlen(ifname_c) + 1);
netlink_attr(&nlmsg, WGDEVICE_A_PRIVATE_KEY, private_c, 32);
netlink_attr(&nlmsg, WGDEVICE_A_LISTEN_PORT, &listen_c, 2);
netlink_nest(&nlmsg, NLA_F_NESTED | WGDEVICE_A_PEERS);
netlink_nest(&nlmsg, NLA_F_NESTED | 0);
netlink_attr(&nlmsg, WGPEER_A_PUBLIC_KEY, public_a, 32);
netlink_attr(&nlmsg, WGPEER_A_ENDPOINT, &endpoint_a_v6,
sizeof(endpoint_a_v6));
netlink_attr(&nlmsg, WGPEER_A_PERSISTENT_KEEPALIVE_INTERVAL,
&persistent_keepalives[4], 2);
netlink_nest(&nlmsg, NLA_F_NESTED | WGPEER_A_ALLOWEDIPS);
netlink_nest(&nlmsg, NLA_F_NESTED | 0);
netlink_attr(&nlmsg, WGALLOWEDIP_A_FAMILY, &af_inet, 2);
netlink_attr(&nlmsg, WGALLOWEDIP_A_IPADDR, &first_half_v4,
sizeof(first_half_v4));
netlink_attr(&nlmsg, WGALLOWEDIP_A_CIDR_MASK, &half_cidr, 1);
netlink_done(&nlmsg);
netlink_nest(&nlmsg, NLA_F_NESTED | 0);
netlink_attr(&nlmsg, WGALLOWEDIP_A_FAMILY, &af_inet6, 2);
netlink_attr(&nlmsg, WGALLOWEDIP_A_IPADDR, &first_half_v6,
sizeof(first_half_v6));
netlink_attr(&nlmsg, WGALLOWEDIP_A_CIDR_MASK, &half_cidr, 1);
netlink_done(&nlmsg);
netlink_done(&nlmsg);
netlink_done(&nlmsg);
netlink_nest(&nlmsg, NLA_F_NESTED | 0);
netlink_attr(&nlmsg, WGPEER_A_PUBLIC_KEY, public_b, 32);
netlink_attr(&nlmsg, WGPEER_A_ENDPOINT, &endpoint_b_v4,
sizeof(endpoint_b_v4));
netlink_attr(&nlmsg, WGPEER_A_PERSISTENT_KEEPALIVE_INTERVAL,
&persistent_keepalives[5], 2);
netlink_nest(&nlmsg, NLA_F_NESTED | WGPEER_A_ALLOWEDIPS);
netlink_nest(&nlmsg, NLA_F_NESTED | 0);
netlink_attr(&nlmsg, WGALLOWEDIP_A_FAMILY, &af_inet, 2);
netlink_attr(&nlmsg, WGALLOWEDIP_A_IPADDR, &second_half_v4,
sizeof(second_half_v4));
netlink_attr(&nlmsg, WGALLOWEDIP_A_CIDR_MASK, &half_cidr, 1);
netlink_done(&nlmsg);
netlink_nest(&nlmsg, NLA_F_NESTED | 0);
netlink_attr(&nlmsg, WGALLOWEDIP_A_FAMILY, &af_inet6, 2);
netlink_attr(&nlmsg, WGALLOWEDIP_A_IPADDR, &second_half_v6,
sizeof(second_half_v6));
netlink_attr(&nlmsg, WGALLOWEDIP_A_CIDR_MASK, &half_cidr, 1);
netlink_done(&nlmsg);
netlink_done(&nlmsg);
netlink_done(&nlmsg);
netlink_done(&nlmsg);
err = netlink_send(&nlmsg, sock);
if (err < 0) {
}
error:
close(sock);
}
static void initialize_netdevices(void) {
char netdevsim[16];
sprintf(netdevsim, "netdevsim%d", (int)procid);
struct {
const char* type;
const char* dev;
} devtypes[] = {
{"ip6gretap", "ip6gretap0"}, {"bridge", "bridge0"}, {"vcan", "vcan0"},
{"bond", "bond0"}, {"team", "team0"}, {"dummy", "dummy0"},
{"nlmon", "nlmon0"}, {"caif", "caif0"}, {"batadv", "batadv0"},
{"vxcan", "vxcan1"}, {"veth", 0}, {"wireguard", "wg0"},
{"wireguard", "wg1"}, {"wireguard", "wg2"},
};
const char* devmasters[] = {"bridge", "bond", "team", "batadv"};
struct {
const char* name;
int macsize;
bool noipv6;
} devices[] = {
{"lo", ETH_ALEN},
{"sit0", 0},
{"bridge0", ETH_ALEN},
{"vcan0", 0, true},
{"tunl0", 0},
{"gre0", 0},
{"gretap0", ETH_ALEN},
{"ip_vti0", 0},
{"ip6_vti0", 0},
{"ip6tnl0", 0},
{"ip6gre0", 0},
{"ip6gretap0", ETH_ALEN},
{"erspan0", ETH_ALEN},
{"bond0", ETH_ALEN},
{"veth0", ETH_ALEN},
{"veth1", ETH_ALEN},
{"team0", ETH_ALEN},
{"veth0_to_bridge", ETH_ALEN},
{"veth1_to_bridge", ETH_ALEN},
{"veth0_to_bond", ETH_ALEN},
{"veth1_to_bond", ETH_ALEN},
{"veth0_to_team", ETH_ALEN},
{"veth1_to_team", ETH_ALEN},
{"veth0_to_hsr", ETH_ALEN},
{"veth1_to_hsr", ETH_ALEN},
{"hsr0", 0},
{"dummy0", ETH_ALEN},
{"nlmon0", 0},
{"vxcan0", 0, true},
{"vxcan1", 0, true},
{"caif0", ETH_ALEN},
{"batadv0", ETH_ALEN},
{netdevsim, ETH_ALEN},
{"xfrm0", ETH_ALEN},
{"veth0_virt_wifi", ETH_ALEN},
{"veth1_virt_wifi", ETH_ALEN},
{"virt_wifi0", ETH_ALEN},
{"veth0_vlan", ETH_ALEN},
{"veth1_vlan", ETH_ALEN},
{"vlan0", ETH_ALEN},
{"vlan1", ETH_ALEN},
{"macvlan0", ETH_ALEN},
{"macvlan1", ETH_ALEN},
{"ipvlan0", ETH_ALEN},
{"ipvlan1", ETH_ALEN},
{"veth0_macvtap", ETH_ALEN},
{"veth1_macvtap", ETH_ALEN},
{"macvtap0", ETH_ALEN},
{"macsec0", ETH_ALEN},
{"veth0_to_batadv", ETH_ALEN},
{"veth1_to_batadv", ETH_ALEN},
{"batadv_slave_0", ETH_ALEN},
{"batadv_slave_1", ETH_ALEN},
{"geneve0", ETH_ALEN},
{"geneve1", ETH_ALEN},
{"wg0", 0},
{"wg1", 0},
{"wg2", 0},
};
int sock = socket(AF_NETLINK, SOCK_RAW, NETLINK_ROUTE);
if (sock == -1) exit(1);
unsigned i;
for (i = 0; i < sizeof(devtypes) / sizeof(devtypes[0]); i++)
netlink_add_device(&nlmsg, sock, devtypes[i].type, devtypes[i].dev);
for (i = 0; i < sizeof(devmasters) / (sizeof(devmasters[0])); i++) {
char master[32], slave0[32], veth0[32], slave1[32], veth1[32];
sprintf(slave0, "%s_slave_0", devmasters[i]);
sprintf(veth0, "veth0_to_%s", devmasters[i]);
netlink_add_veth(&nlmsg, sock, slave0, veth0);
sprintf(slave1, "%s_slave_1", devmasters[i]);
sprintf(veth1, "veth1_to_%s", devmasters[i]);
netlink_add_veth(&nlmsg, sock, slave1, veth1);
sprintf(master, "%s0", devmasters[i]);
netlink_device_change(&nlmsg, sock, slave0, false, master, 0, 0, NULL);
netlink_device_change(&nlmsg, sock, slave1, false, master, 0, 0, NULL);
}
netlink_add_xfrm(&nlmsg, sock, "xfrm0");
netlink_device_change(&nlmsg, sock, "bridge_slave_0", true, 0, 0, 0, NULL);
netlink_device_change(&nlmsg, sock, "bridge_slave_1", true, 0, 0, 0, NULL);
netlink_add_veth(&nlmsg, sock, "hsr_slave_0", "veth0_to_hsr");
netlink_add_veth(&nlmsg, sock, "hsr_slave_1", "veth1_to_hsr");
netlink_add_hsr(&nlmsg, sock, "hsr0", "hsr_slave_0", "hsr_slave_1");
netlink_device_change(&nlmsg, sock, "hsr_slave_0", true, 0, 0, 0, NULL);
netlink_device_change(&nlmsg, sock, "hsr_slave_1", true, 0, 0, 0, NULL);
netlink_add_veth(&nlmsg, sock, "veth0_virt_wifi", "veth1_virt_wifi");
netlink_add_linked(&nlmsg, sock, "virt_wifi", "virt_wifi0",
"veth1_virt_wifi");
netlink_add_veth(&nlmsg, sock, "veth0_vlan", "veth1_vlan");
netlink_add_vlan(&nlmsg, sock, "vlan0", "veth0_vlan", 0, htons(ETH_P_8021Q));
netlink_add_vlan(&nlmsg, sock, "vlan1", "veth0_vlan", 1, htons(ETH_P_8021AD));
netlink_add_macvlan(&nlmsg, sock, "macvlan0", "veth1_vlan");
netlink_add_macvlan(&nlmsg, sock, "macvlan1", "veth1_vlan");
netlink_add_ipvlan(&nlmsg, sock, "ipvlan0", "veth0_vlan", IPVLAN_MODE_L2, 0);
netlink_add_ipvlan(&nlmsg, sock, "ipvlan1", "veth0_vlan", IPVLAN_MODE_L3S,
IPVLAN_F_VEPA);
netlink_add_veth(&nlmsg, sock, "veth0_macvtap", "veth1_macvtap");
netlink_add_linked(&nlmsg, sock, "macvtap", "macvtap0", "veth0_macvtap");
netlink_add_linked(&nlmsg, sock, "macsec", "macsec0", "veth1_macvtap");
char addr[32];
sprintf(addr, DEV_IPV4, 14 + 10);
struct in_addr geneve_addr4;
if (inet_pton(AF_INET, addr, &geneve_addr4) <= 0) exit(1);
struct in6_addr geneve_addr6;
if (inet_pton(AF_INET6, "fc00::01", &geneve_addr6) <= 0) exit(1);
netlink_add_geneve(&nlmsg, sock, "geneve0", 0, &geneve_addr4, 0);
netlink_add_geneve(&nlmsg, sock, "geneve1", 1, 0, &geneve_addr6);
netdevsim_add((int)procid, 4);
netlink_wireguard_setup();
for (i = 0; i < sizeof(devices) / (sizeof(devices[0])); i++) {
char addr[32];
sprintf(addr, DEV_IPV4, i + 10);
netlink_add_addr4(&nlmsg, sock, devices[i].name, addr);
if (!devices[i].noipv6) {
sprintf(addr, DEV_IPV6, i + 10);
netlink_add_addr6(&nlmsg, sock, devices[i].name, addr);
}
uint64_t macaddr = DEV_MAC + ((i + 10ull) << 40);
netlink_device_change(&nlmsg, sock, devices[i].name, true, 0, &macaddr,
devices[i].macsize, NULL);
}
close(sock);
}
static void initialize_netdevices_init(void) {
int sock = socket(AF_NETLINK, SOCK_RAW, NETLINK_ROUTE);
if (sock == -1) exit(1);
struct {
const char* type;
int macsize;
bool noipv6;
bool noup;
} devtypes[] = {
{"nr", 7, true},
{"rose", 5, true, true},
};
unsigned i;
for (i = 0; i < sizeof(devtypes) / sizeof(devtypes[0]); i++) {
char dev[32], addr[32];
sprintf(dev, "%s%d", devtypes[i].type, (int)procid);
sprintf(addr, "172.30.%d.%d", i, (int)procid + 1);
netlink_add_addr4(&nlmsg, sock, dev, addr);
if (!devtypes[i].noipv6) {
sprintf(addr, "fe88::%02x:%02x", i, (int)procid + 1);
netlink_add_addr6(&nlmsg, sock, dev, addr);
}
int macsize = devtypes[i].macsize;
uint64_t macaddr = 0xbbbbbb +
((unsigned long long)i << (8 * (macsize - 2))) +
(procid << (8 * (macsize - 1)));
netlink_device_change(&nlmsg, sock, dev, !devtypes[i].noup, 0, &macaddr,
macsize, NULL);
}
close(sock);
}
#define MAX_FDS 30
static void setup_common() {
if (mount(0, "/sys/fs/fuse/connections", "fusectl", 0, 0)) {
}
}
static void setup_binderfs() {
if (mkdir("/dev/binderfs", 0777)) {
}
if (mount("binder", "/dev/binderfs", "binder", 0, NULL)) {
}
if (symlink("/dev/binderfs", "./binderfs")) {
}
}
static void loop();
static void sandbox_common() {
prctl(PR_SET_PDEATHSIG, SIGKILL, 0, 0, 0);
setsid();
struct rlimit rlim;
rlim.rlim_cur = rlim.rlim_max = (200 << 20);
setrlimit(RLIMIT_AS, &rlim);
rlim.rlim_cur = rlim.rlim_max = 32 << 20;
setrlimit(RLIMIT_MEMLOCK, &rlim);
rlim.rlim_cur = rlim.rlim_max = 136 << 20;
setrlimit(RLIMIT_FSIZE, &rlim);
rlim.rlim_cur = rlim.rlim_max = 1 << 20;
setrlimit(RLIMIT_STACK, &rlim);
rlim.rlim_cur = rlim.rlim_max = 128 << 20;
setrlimit(RLIMIT_CORE, &rlim);
rlim.rlim_cur = rlim.rlim_max = 256;
setrlimit(RLIMIT_NOFILE, &rlim);
if (unshare(CLONE_NEWNS)) {
}
if (mount(NULL, "/", NULL, MS_REC | MS_PRIVATE, NULL)) {
}
if (unshare(CLONE_NEWIPC)) {
}
if (unshare(0x02000000)) {
}
if (unshare(CLONE_NEWUTS)) {
}
if (unshare(CLONE_SYSVSEM)) {
}
typedef struct {
const char* name;
const char* value;
} sysctl_t;
static const sysctl_t sysctls[] = {
{"/proc/sys/kernel/shmmax", "16777216"},
{"/proc/sys/kernel/shmall", "536870912"},
{"/proc/sys/kernel/shmmni", "1024"},
{"/proc/sys/kernel/msgmax", "8192"},
{"/proc/sys/kernel/msgmni", "1024"},
{"/proc/sys/kernel/msgmnb", "1024"},
{"/proc/sys/kernel/sem", "1024 1048576 500 1024"},
};
unsigned i;
for (i = 0; i < sizeof(sysctls) / sizeof(sysctls[0]); i++)
write_file(sysctls[i].name, sysctls[i].value);
}
static int wait_for_loop(int pid) {
if (pid < 0) exit(1);
int status = 0;
while (waitpid(-1, &status, __WALL) != pid) {
}
return WEXITSTATUS(status);
}
static void drop_caps(void) {
struct __user_cap_header_struct cap_hdr = {};
struct __user_cap_data_struct cap_data[2] = {};
cap_hdr.version = _LINUX_CAPABILITY_VERSION_3;
cap_hdr.pid = getpid();
if (syscall(SYS_capget, &cap_hdr, &cap_data)) exit(1);
const int drop = (1 << CAP_SYS_PTRACE) | (1 << CAP_SYS_NICE);
cap_data[0].effective &= ~drop;
cap_data[0].permitted &= ~drop;
cap_data[0].inheritable &= ~drop;
if (syscall(SYS_capset, &cap_hdr, &cap_data)) exit(1);
}
static int do_sandbox_none(void) {
if (unshare(CLONE_NEWPID)) {
}
int pid = fork();
if (pid != 0) return wait_for_loop(pid);
setup_common();
sandbox_common();
drop_caps();
initialize_netdevices_init();
if (unshare(CLONE_NEWNET)) {
}
write_file("/proc/sys/net/ipv4/ping_group_range", "0 65535");
initialize_netdevices();
setup_binderfs();
loop();
exit(1);
}
static void kill_and_wait(int pid, int* status) {
kill(-pid, SIGKILL);
kill(pid, SIGKILL);
for (int i = 0; i < 100; i++) {
if (waitpid(-1, status, WNOHANG | __WALL) == pid) return;
usleep(1000);
}
DIR* dir = opendir("/sys/fs/fuse/connections");
if (dir) {
for (;;) {
struct dirent* ent = readdir(dir);
if (!ent) break;
if (strcmp(ent->d_name, ".") == 0 || strcmp(ent->d_name, "..") == 0)
continue;
char abort[300];
snprintf(abort, sizeof(abort), "/sys/fs/fuse/connections/%s/abort",
ent->d_name);
int fd = open(abort, O_WRONLY);
if (fd == -1) {
continue;
}
if (write(fd, abort, 1) < 0) {
}
close(fd);
}
closedir(dir);
} else {
}
while (waitpid(-1, status, __WALL) != pid) {
}
}
static void setup_test() {
prctl(PR_SET_PDEATHSIG, SIGKILL, 0, 0, 0);
setpgrp();
write_file("/proc/self/oom_score_adj", "1000");
}
static void close_fds() {
for (int fd = 3; fd < MAX_FDS; fd++) close(fd);
}
static void execute_one(void);
#define WAIT_FLAGS __WALL
static void loop(void) {
int iter = 0;
for (;; iter++) {
int pid = fork();
if (pid < 0) exit(1);
if (pid == 0) {
setup_test();
execute_one();
close_fds();
exit(0);
}
int status = 0;
uint64_t start = current_time_ms();
for (;;) {
if (waitpid(-1, &status, WNOHANG | WAIT_FLAGS) == pid) break;
sleep_ms(1);
if (current_time_ms() - start < 5000) continue;
kill_and_wait(pid, &status);
break;
}
}
}
uint64_t r[2] = {0xffffffffffffffff, 0xffffffffffffffff};
void execute_one(void) {
intptr_t res = 0;
memcpy((void*)0x20000080, "/dev/net/tun\000", 13);
res = syscall(__NR_openat, /*fd=*/0xffffffffffffff9cul, /*file=*/0x20000080ul,
/*flags=*/0x88002ul, /*mode=*/0ul);
if (res != -1) r[0] = res;
memcpy((void*)0x20000040, "syzkaller1\000\000\000\000\000\000", 16);
*(uint16_t*)0x20000050 = 0x5001;
syscall(__NR_ioctl, /*fd=*/r[0], /*cmd=*/0x400454ca, /*arg=*/0x20000040ul);
res = syscall(__NR_socket, /*domain=*/0x10ul, /*type=*/3ul, /*proto=*/0);
if (res != -1) r[1] = res;
memcpy((void*)0x20000140, "syzkaller1\000\000\000\000\000\000", 16);
*(uint16_t*)0x20000150 = 7;
*(uint16_t*)0x20000152 = htobe16(0);
*(uint32_t*)0x20000154 = htobe32(0);
syscall(__NR_ioctl, /*fd=*/r[1], /*cmd=*/0x8914, /*arg=*/0x20000140ul);
memcpy(
(void*)0x20002580,
"\x07\x03\x00\x00\x00\x04\x00\x00\x00\x00\x60\x2d\x2a\xe1\x0f\x98\x2f\x00"
"\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\xff\x02"
"\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x01\x00\x00\x88\x3e"
"\x00\x00\x02\x00\x00\x00\x00\x00\x68\x00\x00\x00\x00\xcf\x00\x00\x00\x00"
"\x00\x00\x00\xd1\x14\xb1\x39\x16\x5a\xf3\x20\x91\xba\x89\x0f\x11\x43\x69"
"\x7d\x60\xff\x6f\xbf\x67\x4d\xa1\x99\x5e\x0c\xd4\x90\x05\x05\xf2\xce\xb4"
"\x4d\xcd\x98\x20\x9d\x1d\x99\x47\xfc\x39\x6b\xfb\x08\x71\xe6\x49\x13\x13"
"\xcf\xe0\x78\x8a\x50\x74\xe8\x9e\x8a\xe3\xba\x8d\xf7\xe6\x87\x7d\x0b\x40"
"\xee\xec\x0e\x36\x2d\x17\xeb\x2f\x71\x80\x2b\xb6\x0e\xa9\x7b\x5a\xfc\x81"
"\x0d\x37\xd1\x54\xe4\x7b\x04\x4a\xb8\x0e\x72\x38\x58\x8f\xbf\x37\xde\xc7"
"\x82\xb8\xb1\xbc\xc0\x95\x01\x73\x79\x14\x56\x95\x9f\x80\x3d\x61\xb0\x56"
"\x31\xef\xbb\xfc\xce\xbe\xaf\xef\x57\xbd\x95\x63\xc2\x7e\xc7\xe5\x0d\xdb"
"\x67\x18\xb4\xa2\xac\xa7\x20\xfd\x86\x62\xc6\x71\x3d\x50\x7f\x08\xb8\xed"
"\x95\x62\x2e\xbe\xbe\x3a\x02\xb9\x76\x44\xe2\x40\xf3\x04\x23\xfb\xaa\x33"
"\x9c\x43\x3d\x6b\x41\xf6\xdb\x76\x70\xa5\xaf\x4b\x2f\x17\x2e\x64\xc2\xe5"
"\xb4\x0b\x8f\x6b\x37\xc2\xe6\x44\x21\xd0\x33\x1a\xff\x52\xb9\xc9\x10\xff"
"\x01\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x01\x00\x01\x00"
"\x00\x01\x00\x00\x8c\xb3\x7d\x45\x18\xd6\xae\x13\xad\xdd\x27\x1c\xa3\x9d"
"\x04\x8e\xd6\xd8\x30\xfc\x13\x40\x62\x36\xe5\xb6\x7f\x4c\xda\xd0\x86\x7d"
"\xff\x7a\x4d\x54\x4a\x31\xa8\x95\xf0\xe9\x67\xa2\xaa\x3a\xaa\x21\x95\xcd"
"\x11\x81\x1a\x8e\x0c\x3b\x78\xa3\x01\xb1\xd4\xcf\xcf\xf4\xa6\x9f\xac\x54"
"\x6d\xb9\xf8\x17\x07\xb4\x2c\x40\x98\xb6\x79\x46\x9e\xfe\x5b\x8e\xe7\x1c"
"\x87\x96\xbb\x12\xe3\xe2\x64\x1e\xf4\x0d\xa6\x63\xe4\x02\xc9\x62\xf7\xe1"
"\xd9\x95\x3e\x53\x64\x5f\x6f\xfd\xa6\x98\x7d\xb8\x4b\x9a\x80\x6c\x7c\x2f"
"\xe0\xa6\x9d\x4d\xb3\xfd\x31\x4b\x37\x41\x0f\xa0\xe6\x5c\x56\x14\x9b\xde"
"\x13\xbd\xf8\x92\x42\x41\x1d\xc1\x97\xea\xfa\xfd\x76\xa0\x7e\x83\xf3\xc8"
"\xb2\xab\x12\x61\xcc\x75\x63\x16\x5e\x38\x0b\xc3\x9c\xc4\xe8\x8d\x70\xb8"
"\x63\xce\x00\x7e\x71\x6d\x86\x09\x2f\xd1\xec\x17\xdb\xd2\x41\x81\xa6\x4e"
"\x28\x32\xc8\x39\x07\x49\xf2\x7f\x89\x89\xa9\x4a\x94\xb4\xd6\x9d\xd3\xbd"
"\xb0\xd3\x96\xc7\xd5\x8f\x79\x77\xe1\xc0\x1c\xbd\xfb\xe7\xad\xf0\x7a\x80"
"\xaf\x96\x22\x5c\xff\xad\x1d\xcb\xd2\xc6\x17\x21\x6b\xf8\x9b\x8a\xe7\xcd"
"\x0e\x41\x63\x83\x0a\xcc\x2f\x1c\x95\x4c\x75\x44\x8d\x27\xa8\x91\x89\xf4"
"\x91\xf6\x69\x7c\xed\xed\xb9\x5d\xe0\xf0\x23\x1c\x57\x31\x7f\x61\x0a\x52"
"\xfe\xd4\x4e\xbb\xa1\x1b\xe4\x0e\x36\x56\x89\x50\xb4\x7c\x18\x7c\x86\xdb"
"\x3e\xba\x66\xe3\x21\xb5\xa9\x0d\x0f\xa5\xc4\x48\x4a\xca\x6e\x66\xd9\xc0"
"\xa8\x9f\x4a\x70\xc0\xe9\x2a\x24\x64\x5a\x89\x67\xd6\x88\xdc\xcd\x14\x8d"
"\x79\x43\x65\xae\x67\x2f\x69\xfe\xf7\xf4\x2c\x97\x4d\x44\x46\x43\xdf\xa5"
"\xbf\x84\x2a\xbf\x60\x80\x5c\xcf\x13\xd6\x0f\x93\x88\x5e\x9e\x36\xea\xbc"
"\xaf\x12\x97\xa9\x34\x3e\x4f\x7a\x31\x84\xae\xdf\xae\xd8\xab\x6c\x2c\x3a"
"\xf6\x8c\x40\x23\x10\x1a\xae\xb3\x6c\xf1\xb2\x85\xe3\xa8\xfe\xf3\x31\xe6"
"\x19\xa1\xd0\xe2\x71\x45\x5f\xda\x62\xba\xde\x30\x32\xf7\x36\xe1\x9c\x86"
"\xf4\xd9\x12\xc6\xbf\xe2\x41\x45\xff\xb4\x8a\x46\xd6\x95\xa7\x57\x52\xdf"
"\x73\xf7\x36\x6e\x0f\xef\x6b\x7f\xa4\xb4\x21\x1b\x00\x5d\x97\x07\x89\x4f"
"\x2b\x22\xa8\x25\xb3\xd6\x71\xd9\x9e\xd7\xfb\x8d\xd3\x61\x58\x07\xec\x2e"
"\x2d\x92\xf4\x8f\x9a\x19\x7f\x86\x4c\x39\x0d\xe2\x34\x96\xd1\x51\x7d\x4d"
"\x71\xb7\xe1\x5f\xec\x54\x4c\xba\xaa\xeb\x89\x81\xb6\x6f\xde\x00\x5c\x5d"
"\x09\xaf\xb2\x1b\x1c\xcb\x9c\xbe\x6f\xdc\xc4\xb5\x49\xfb\xa7\x54\x99\xe6"
"\xe1\x08\xfd\x4a\xe4\xfe\xdf\x1b\xab\x77\x98\xe2\xa9\x99\x61\x3a\x72\x73"
"\x65\x2e\x4e\xa9\x07\xeb\xff\xdf\x87\x25\x04\x12\xcd\xfa\xf6\x63\xc7\x47"
"\x93\xb4\x40\x01\x9f\x1b\xef\xb1\x21\xe1\xcf\xf5\xe9\xe6\x18\x7d\xe4\x6d"
"\xb8\x92\x20\x0f\xc2\xaf\x9e\xe2\x36\xfc\xee\xfc\xdb\x1a\x61\xc6\x56\x51"
"\x80\x91\xd3\x91\x1a\x14\xc1\x15\x0d\x91\x1b\x9b\x92\x31\x26\x24\x1d\x77"
"\x3f\xf2\xe6\x22\xbb\x10\x76\xdf\xcc\x37\xa0\x99\x54\x0f\x0d\xd6\xb3\xe9"
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"\x0f\x73\x8c\xe4\xdd\x8e\x5d\xeb\x2f\xbc\xb3\x87\x28\x7f\x71\x73\x53\x8e"
"\x89\x9e\x3d\x40\x12\x79\xfa\x5f\x3a\x38\x4c\x1f\x4c\xd9\x51\xe3\x00\x42"
"\xf0\xf6\x27\x0f\xe6\x60\xba\xc9\x32\x31\x8e\x29\xa7\xd8\x42\x23\x3d\xad"
"\x53\x88\xa6\xc8\x2a\xb9\xb1\x11\xb6\x7a\xe7\x3f\x47\x22\x56\x3f\xc8\x89"
"\x83\x25\x6a\x77\x06\xed\x88\x3a\xc4\x1b\x51\xef\x42\x7c\x2a\xa1\xa8\xa0"
"\xf5\x6b\x72\xc0\xd9\xe8\xce\xe6\x37\xf7\x7f\x67\xe9\x99\x13\x55\x1a\x9c"
"\x78\x49\xf8\xa9\xd5\x0b\x20\x0c\x8e\x6e\x1b\x16\x92\x86\x60\x98\x2b\xc8"
"\xc4\xb7\x70\xfd\x90\x7a\x2d\x74\x0b\xab\xec\x99\x13\x90\xdd\xc2\xb7\xfc"
"\xe2\x3f\xa3\xa6\x11\x31\xbd\xc8\x75\x02\x71\x1b\x4b\x57\x59\xe6\x35\x12"
"\x7a\xdf\xe7\xfe\x69\xe0\x6a\x43\xb4\x50\xf9\xcc\x1c\x60\xe7\xae\xd7\x5f"
"\xfd\x30\xc3\x27\x24\x01\x7e\x7a\x02\x1c\x90\xf8\xc8\x1a\xe8\x65\x90\x8d"
"\x48\xfa\x7f\xcb\x7c\xfb\x9b\x0f\x15\x30\xfd\xe5\x5c\xf0\x8c\xb3\xc1\x4d"
"\x36\x56\x49\x15\x2f\x2c\x8a\x8c\x61\x5f\xef\xb3\x7a\x21\x9f\x73\x0f\x5d"
"\x2a\x66\x0c\x4c\xf0\x30\x8a\x40\xf0\xc0\x60\x99\x32\x11\x36\x30\x14\x28"
"\x40\x8a\x8f\xa8\x73\x5b\xc6\xf7\xea\xeb\xbd\x40\x67\x28\xb6\xe0\xf9\x43"
"\xa8\x59\x75\x57\xf6\xe5\x38\x12\x33\x53\xe5\x6e\x52\x0d\x45\xe9\x93\x1d"
"\xbb\xce\x8c\x5a\x7f\x09\x46\x45\xe1\xed\x88\xd1\x6c\x3d\x91\x72\xb1\x09"
"\xf9\x3f\xd1\x8f\xed\xa6\x95\x69\x41\xe0\xb4\x1f\x35\xe2\xc5\xb7\xc9\x97"
"\xce\xd9\xfb\xac\x1e\x9f\x0f\xf3\x61\xfa\x81\xbe\x5c\xc5\x9e\xd7\x8e\x00"
"\x64\x44\xf7\x1a\xb8\x68\x45\x50\x2a\x0a\x6e\x49\xc8\xef\x81\xf8\xe4\x5c"
"\x94\x3e\x78\x24\xe8\x7e\x65\x13\x74\x58\x50\x0a\xb1\x8f\x0e\xcf\xc9\xaa"
"\x10\xec\x00\xc2\xa1\x02\x3f\xf9\x69\x5c\xc2\x72\x8b\xae\xc1\xf2\x10\x4c"
"\x1d\x69\x90\x69\xb1\x82\x51\x35\xa1\x1f\x2b\x77\x6d\x57\x6e\x38\x64\x09"
"\x19\xed\x96\x85\x0c\xfd\x48\x63\xd5\xc9\xfa\xfe\x47\x3e\x88\x54\x4a\xd0"
"\xd1\xd2\x07\x1e\x00\x0f\x23\x34\x83\xdb\x41\xfe\x5c\x46\xda\x9c\x47\x2b"
"\x6c\xfb\xca\x9a\x0b\xf0\xd8\x20\x37\x4d\x34\xb2\xe8\x4e\xc6\x0d\xc2\x65"
"\x7f\x00\x00\x00\x00\x00\x00\x00\x00\x00\x67\x0d\xb5\x04\x6f\x39\x00\xc1"
"\x8c\xf0\xa1\x2f\x17\xc4\xb1\xbe\xa9\xd0\xb3\x66\x7c\x76\x15\x94\xcb\x2e"
"\x4c\x0c\xb0\xca\xc5\x43\x43\x7b\x6d\x75\x78\x0d\xb9\x19\x76\x3f\x59\x21"
"\x2d\x9c\x4d\xae\x0e\xb9\xe7\x30\xd2\x38\xf4\x0f\xf2\x6b\x34\x3a\x3e\x19"
"\x06\x55\x48\xa4\x10\x6c\x98\xfa\x5e\x5c\x45\xbf\x20\x55\x1f\x7b\x90\x87"
"\x2b\x5a\x88\xd3\x3a\x85\xfe\xe6\x08\xf3\x8f\x90\xff\xfd\xa8\x8b\xc7\xd3"
"\xf7\x0f\xdc\xda\x4c\x9e\xe6\xd6\x24\x0e\xb9\x7c\x76\x6d\xfb\xd4\xec\x13"
"\x89\x4b\x4f\x19\x1d\xe6\x83\xc5\xf9\xae\xfc\xc5",
3918);
*(uint32_t*)0x200034ce = 0x41424344;
*(uint32_t*)0x200034d2 = 0x41424344;
syscall(__NR_write, /*fd=*/r[0], /*buf=*/0x20002580ul, /*count=*/0xfcaul);
}
int main(void) {
syscall(__NR_mmap, /*addr=*/0x1ffff000ul, /*len=*/0x1000ul, /*prot=*/0ul,
/*flags=*/0x32ul, /*fd=*/-1, /*offset=*/0ul);
syscall(__NR_mmap, /*addr=*/0x20000000ul, /*len=*/0x1000000ul, /*prot=*/7ul,
/*flags=*/0x32ul, /*fd=*/-1, /*offset=*/0ul);
syscall(__NR_mmap, /*addr=*/0x21000000ul, /*len=*/0x1000ul, /*prot=*/0ul,
/*flags=*/0x32ul, /*fd=*/-1, /*offset=*/0ul);
do_sandbox_none();
return 0;
}
=* repro.txt =*
r0 = openat$tun(0xffffffffffffff9c, &(0x7f0000000080), 0x88002, 0x0)
ioctl$TUNSETIFF(r0, 0x400454ca, &(0x7f0000000040)={'syzkaller1\x00',
0x420000015001})
r1 = socket$netlink(0x10, 0x3, 0x0)
ioctl$sock_inet_SIOCSIFADDR(r1, 0x8914,
&(0x7f0000000140)={'syzkaller1\x00', {0x7, 0x0, @empty}})
write$tun(r0, &(0x7f0000002580)=ANY=[@ANYBLOB="07030000000400000000602d2ae10f982f0000000000000000000000000000000000ff0200000000000000000000000000010000883e00000200000000006800000000cf00000000000000d114b139165af32091ba890f1143697d60ff6fbf674da1995e0cd4900505f2ceb44dcd98209d1d9947fc396bfb0871e6491313cfe0788a5074e89e8ae3ba8df7e6877d0b40eeec0e362d17eb2f71802bb60ea97b5afc810d37d154e47b044ab80e7238588fbf37dec782b8b1bcc0950173791456959f803d61b05631efbbfccebeafef57bd9563c27ec7e50ddb6718b4a2aca720fd8662c6713d507f08b8ed95622ebebe3a02b97644e240f30423fbaa339c433d6b41f6db7670a5af4b2f172e64c2e5b40b8f6b37c2e64421d0331aff52b9c910ff010000000000000000000000000001000100000100008cb37d4518d6ae13addd271ca39d048ed6d830fc13406236e5b67f4cdad0867dff7a4d544a31a895f0e967a2aa3aaa2195cd11811a8e0c3b78a301b1d4cfcff4a69fac546db9f81707b42c4098b679469efe5b8ee71c8796bb12e3e2641ef40da663e402c962f7e1d9953e53645f6ffda6987db84b9a806c7c2fe0a69d4db3fd314b37410fa0e65c56149bde13bdf89242411dc197eafafd76a07e83f3c8b2ab1261cc7563165e380bc39cc4e88d70b863ce007e716d86092fd1ec17dbd24181a64e2832c8390749f27f8989a94a94b4d69dd3bdb0d396c7d58f7977e1c01cbdfbe7adf07a80af96225cffad1dcbd2c617216bf89b8ae7cd0e4163830acc2f1c954c75448d27a89189f491f6697cededb95de0f0231c57317f610a52fed44ebba11be40e36568950b47c187c86db3eba66e321b5a90d0fa5c4484aca6e66d9c0a89f4a70c0e92a24645a8967d688dccd148d794365ae672f69fef7f42c974d444643dfa5bf842abf60805ccf13d60f93885e9e36eabcaf1297a9343e4f7a3184aedfaed8ab6c2c3af68c4023101aaeb36cf1b285e3a8fef331e619a1d0e271455fda62bade3032f736e19c86f4d912c6bfe24145ffb48a46d695a75752df73f7366e0fef6b7fa4b4211b005d9707894f2b22a825b3d671d99ed7fb8dd3615807ec2e2d92f48f9a197f864c390de23496d1517d4d71b7e15fec544cbaaaeb8981b66fde005c5d09afb21b1ccb9cbe6fdcc4b549fba75499e6e108fd4ae4fedf1bab7798e2a999613a7273652e4ea907ebffdf87250412cdfaf663c74793b440019f1befb121e1cff5e9e6187de46db892200fc2af9ee236fceefcdb1a61c656518091d3911a14c1150d911b9b923126241d773ff2e622bb1076dfcc37a099540f0dd6b3e9689251a0fbfe4cde79f99b3aacc651c061c966b7a7a5def73e14f2df0e54521846203edbc006a75d27b2574a280f44bb684ad766c6ee091ac400a5e9e7b82aa3e40aa8f69563dc14e90cb7c2dd1a8fb3265a89ebec21e301c29dab4b04ba9a6263b8c59a32c7ed3ab60e4acbf49b4809efc47def8c11bafe0a3f02c08d46f79ec6e063cfefed23891834481aa4ec50b7ee506ee36739809f33f89ddd40152aece71235ae9d8b656b92a69479b3b5b97f3549b5406136caebeb46ee6a6603d3acd001a6b3a9ef56f511e512667a57220a138a3c09aedd374d69224a148a4ddf95534fd64673c0f180f344964fb30fae6082f6ae7146417617e3196fe1ecc740028576496f736f8c8e5c5213df54baf22f8b5df6773716e846c9bb4452ba44659c3022b391dc0cff685f159ccfac22e2cc5caccea60b29059f525449a58f6f53246128cf0126266e66ead7d7b57c7017c8dacfc758092c0d10523986e8468bfa3e8cd1c6b526e2ad2325d2b759fe70ab4de74661c48d64ae07db86f0bc115375abc4cef4afe6c3f25784ff1915864c2839e4c694ed16c583cae16b14bb11da5a5fa659cf1298895481fccaff262d6b38d3129be8a6883b6360f86508ed809fe3e6112ad85059e0bd1624f9282200385551fa41b988139644a2b0bbd09be730c6010a70e846b861f9531806e1baf04e032991fba36f2c55c9eecad743756a5f8746422b900facb8b4db4632c277cdeca7c7288a8816696ad354d5f00753e0f3d6e1e1ad3ec66d21fc01c4ae29fde5db53274ccf04ea8dca09db82c1dbf3202cb4b65d76c08fbb18ba203be4856fc9ace69216474b8a129c063b9d8a712bc48946cbb2436219f9052a5aeecb3322ae984c5b07f2896e5a05daeb3818b2c6ae5189f16d262221cb35c2d6b933d119cc550fdef69c34bb9df0ddb7572ae801ceb1f00c448dbc2a51f2da6cd6992df1d6a18e81ba2f44bb337b8a161fa81604e1c8ce9b8cd8351b6e7575196f4331fc88c9a9d3ab8f1a646114dfc75527b9b669f8d61c325d11a87537205cd7f8d6758837e7b45179534f7f38002c4cb5e322d01b3beb3bc6aa41fb91c05c945f50f62a23debd8ff86bf24576a3a021359d287ba19977c9ce3d3105c05fe439e85682aa03fdea6b1db6eda4a46e66240ec2b34bc471a777231578aa7e4bfc1f18108f03cf8c36ac0be806d031309e39abc672370aae6c0960b6bef99e2a628eb169c5e6b6b8d228a9ba9a2fe14cf315331eee6714357d7ebb84667b5a6d3900d4e75ee8911de59d3bcc2d4bd0d5142a02d860881f7a7106c59e5ae10c56c88e2fdf6471e579cbdc0be5c6565e022ca65d81737cd0df1a5381e56a9ee09fafe9d60215748c15b5e2ed9cc37f1c7d51a05f004350fe746da19f3f0127546b63c66f3c40039132bbe2c74b286ef80101c8ebb4e84fe3978e0e208bebd8d3b9fdf74bdc108d08ef4d86236d327c5ff1b9c29d4cd0950e09f0e86848c5d3028dc7994a589e60d0f293b9825651c8496210a00a843db37104085a53646e4f9ef8876c06c9b3014eed02a21a9341ce746c15d3638e7aee8a16cf623d1a94be850d77d0fc22935eded1d6f691762029cdf3005395044ab8bc989a7f676f28bc2ce310a13e3003c9ba3b814c82a511318435f0fadcc7088b9d477b5b5ecb884505f010f9b072a20d6fb291b8524fb0f6e847f452ff5ba3eeb8b12c0e3e25decc81b8f1f8d980300cc92ce70cdcf03f7078ccd7c79b9db167fe7e82dc040e68f941f336847279cc9960dc6b0ad65adcf1050bc28eaf700af1f39e76489ff19c1a4865d89bf5dc8a89dd6451bd52dcbf6763ead8a60e4fbdd85ca37b25bc3edca8f27860fdf39ad5993ee1b47f02ccaad9b2cae3ef5300c19637ec24f0cb2acc88e8a63908777f0c759b265581aea3e3a74fcb443d4f2899cf3c3a28c94d5b8ed28fd001742459b99dcd48a6c7cd30600b61262eac6d249e34f7569aa534c37be088b12ce8a917af4db6a603b7355414cc2a92071f64f17bc73a62b2a461fb4f907c8155090a6ccad718d3f48644659cba76a42abbbf22a9acbcdcbbf16f11494f214bd6a5bcc5415aa78ad9d5c9d955c01874ce2416c7e7444146aaa291436b9addb2cdacaffa854284e31cbea9315a39cf561d395cd202eb13d1e330a8303ce948cd9af26d14e2f06bbf7a822e6547fb1d750b361c68595b68f7b7d3a2bd7aa00713d4afa823c44aee128568c280bef9254319c0fd37ead30eac8354be03f4ff441690522b940353c9f3cfeb3cf399c58aea6e25bc5fceef0c2934760d9a7cb7614dc3901960b6a1be8ac14c367fd8eec448929fc1f5efc8a7bd300e109203629829bf79050b856f268a101cfb858bc5439852366ce7ca2051bf01571ca4a3b2c5b2fe0de818f3cab43d05cd38a2cac4fd9255b897855b55eee83532a0d82421c7ed7426de5381887d92d24c678f3a1642219e6baa067efef2410a4045f19581a328160c551991a280c2922d47a274f0d0ceaca974b786238aff3f7b8931775f2adf50ceacfedf719da4893580592725313c209a4d11029aa198cdb9a80d31c8b40e6de5b74d752287500494c3e22df36cdfdb6f4d5a8ac2c871ee89772a7a00ec5cc78b39c9d04bb079b759af9bf5f90a07a43fc23686f7f13f3c6edcd80ee12a6385640147e8ac545ee68753cc01dfa23af4d1e0d63912453aaf7d8b1227ca6725458639978e2ea95c3d32dbba6bb52c7b191379c6a2bd5c4b7bdc47c70e736c7da1c9b6795c6547a741affbff4bf37d09ef4d3682e73004dd065229c6755994ff0679125123289d94af036201e48547f599e24b7d8778de18380710e370c3c86f0a4883595434a5f6f93f955abdc013ab487afed0e1cb053267f3299733f17125d7b7153f8f9ef77f8683e026ebed04549b0ff155ab9b4d5995f946c9a8487007e2dd5f8f6baa257b6d9693fdcd4a3d823384ac9e92b66831f295d72f7c0ba5398b8a6ad39d0fa6e53097bbd16349570a96245e3bb5e41c93aa6089ec853dc7a4f91153a526f1b66cc26ad424d32b57369aa2cd5aa251a40b318944cd6c09f276ea9cf5a4212724cba371fe490b4d0e80e643bd236a9ddb2db1fc36cfb9b0ccbdce44a77d1a6bb02b37b7cfe08c995ddba25e298469698e7b1e4f4977b7ac41409a08aeec23a6bac5293dd202b53aa2279ec86e0219cae6cea3c09666637caf076e9eedd0ecae03ef34338d9ba9b35c1ba6772f4e7aa6f4a64d15e3390c827212b93192f19a96090a009f96f35b3183c6de6f3d70947d862db1275c0447b2da787b7a6372de282e20a6fc8880e0ea6a0f738ce4dd8e5deb2fbcb387287f7173538e899e3d401279fa5f3a384c1f4cd951e30042f0f6270fe660bac932318e29a7d842233dad5388a6c82ab9b111b67ae73f4722563fc88983256a7706ed883ac41b51ef427c2aa1a8a0f56b72c0d9e8cee637f77f67e99913551a9c7849f8a9d50b200c8e6e1b16928660982bc8c4b770fd907a2d740babec991390ddc2b7fce23fa3a61131bdc87502711b4b5759e635127adfe7fe69e06a43b450f9cc1c60e7aed75ffd30c32724017e7a021c90f8c81ae865908d48fa7fcb7cfb9b0f1530fde55cf08cb3c14d365649152f2c8a8c615fefb37a219f730f5d2a660c4cf0308a40f0c06099321136301428408a8fa8735bc6f7eaebbd406728b6e0f943a8597557f6e538123353e56e520d45e9931dbbce8c5a7f094645e1ed88d16c3d9172b109f93fd18feda6956941e0b41f35e2c5b7c997ced9fbac1e9f0ff361fa81be5cc59ed78e006444f71ab86845502a0a6e49c8ef81f8e45c943e7824e87e65137458500ab18f0ecfc9aa10ec00c2a1023ff9695cc2728baec1f2104c1d699069b1825135a11f2b776d576e38640919ed96850cfd4863d5c9fafe473e88544ad0d1d2071e000f233483db41fe5c46da9c472b6cfbca9a0bf0d820374d34b2e84ec60dc2657f000000000000000000670db5046f3900c18cf0a12f17c4b1bea9d0b3667c761594cb2e4c0cb0cac543437b6d75780db919763f59212d9c4dae0eb9e730d238f40ff26b343a3e19065548a4106c98fa5e5c45bf20551f7b90872b5a88d33a85fee608f38f90fffda88bc7d3f70fdcda4c9ee6d6240eb97c766dfbd4ec13894b4f191de683c5f9aefcc5",
@ANYRES32=0x41424344, @ANYRES32=0x41424344, @ANYBLOB], 0xfca)
and see also in
https://gist.github.com/xrivendell7/cb92d91813377419faaacb1c2ee47c46
I hope it helps.
Best regards.
xingwei Lee
^ permalink raw reply [flat|nested] 2+ messages in thread
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2018-09-20 20:54 KMSAN: uninit-value in IP6_ECN_decapsulate syzbot
2023-12-24 2:36 xingwei lee
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