* KASAN: slab-out-of-bounds Read in __xfrm6_tunnel_spi_lookup
@ 2020-07-13 22:04 syzbot
2020-07-14 9:37 ` Steffen Klassert
0 siblings, 1 reply; 5+ messages in thread
From: syzbot @ 2020-07-13 22:04 UTC (permalink / raw)
To: davem, herbert, kuba, kuznet, linux-kernel, netdev,
steffen.klassert, syzkaller-bugs, yoshfuji
Hello,
syzbot found the following crash on:
HEAD commit: be978f8f Add linux-next specific files for 20200713
git tree: linux-next
console output: https://syzkaller.appspot.com/x/log.txt?x=1225f8c7100000
kernel config: https://syzkaller.appspot.com/x/.config?x=3fe4fccb94cbc1a6
dashboard link: https://syzkaller.appspot.com/bug?extid=ea9832f8ae588deb0205
compiler: gcc (GCC) 10.1.0-syz 20200507
syz repro: https://syzkaller.appspot.com/x/repro.syz?x=17270713100000
C reproducer: https://syzkaller.appspot.com/x/repro.c?x=126c0ffb100000
Bisection is inconclusive: the first bad commit could be any of:
08622869 ip6_vti: support IP6IP6 tunnel processing with .cb_handler
e6ce6457 ip_vti: support IPIP6 tunnel processing
2ab110cb ip6_vti: support IP6IP tunnel processing
87e66b96 ip_vti: support IPIP tunnel processing with .cb_handler
86afc703 tunnel6: add tunnel6_input_afinfo for ipip and ipv6 tunnels
d5a7a505 ipcomp: assign if_id to child tunnel from parent tunnel
6df2db5d tunnel4: add cb_handler to struct xfrm_tunnel
d7b360c2 xfrm: interface: support IP6IP6 and IP6IP tunnels processing with .cb_handler
1475ee0a xfrm: add is_ipip to struct xfrm_input_afinfo
da9bbf05 xfrm: interface: support IPIP and IPIP6 tunnels processing with .cb_handler
2d4c7986 Merge remote-tracking branch 'origin/testing'
428d2459 xfrm: introduce oseq-may-wrap flag
bdf0acad Merge remote-tracking branch 'ipsec-next/master'
bisection log: https://syzkaller.appspot.com/x/bisect.txt?x=137de95d100000
IMPORTANT: if you fix the bug, please add the following tag to the commit:
Reported-by: syzbot+ea9832f8ae588deb0205@syzkaller.appspotmail.com
==================================================================
BUG: KASAN: slab-out-of-bounds in __xfrm6_tunnel_spi_lookup+0x3a9/0x3b0 net/ipv6/xfrm6_tunnel.c:79
Read of size 8 at addr ffff88809a0d6b80 by task syz-executor016/7061
CPU: 1 PID: 7061 Comm: syz-executor016 Not tainted 5.8.0-rc4-next-20200713-syzkaller #0
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+0x18f/0x20d lib/dump_stack.c:118
print_address_description.constprop.0.cold+0xae/0x497 mm/kasan/report.c:383
__kasan_report mm/kasan/report.c:513 [inline]
kasan_report.cold+0x1f/0x37 mm/kasan/report.c:530
__xfrm6_tunnel_spi_lookup+0x3a9/0x3b0 net/ipv6/xfrm6_tunnel.c:79
xfrm6_tunnel_spi_lookup+0x8a/0x1d0 net/ipv6/xfrm6_tunnel.c:95
xfrmi6_rcv_tunnel+0xb9/0x100 net/xfrm/xfrm_interface.c:810
tunnel46_rcv+0xef/0x2b0 net/ipv6/tunnel6.c:193
ip6_protocol_deliver_rcu+0x2e8/0x1670 net/ipv6/ip6_input.c:433
ip6_input_finish+0x7f/0x160 net/ipv6/ip6_input.c:474
NF_HOOK include/linux/netfilter.h:307 [inline]
NF_HOOK include/linux/netfilter.h:301 [inline]
ip6_input+0x9c/0xd0 net/ipv6/ip6_input.c:483
ip6_mc_input+0x411/0xea0 net/ipv6/ip6_input.c:577
dst_input include/net/dst.h:449 [inline]
ip6_rcv_finish net/ipv6/ip6_input.c:76 [inline]
NF_HOOK include/linux/netfilter.h:307 [inline]
NF_HOOK include/linux/netfilter.h:301 [inline]
ipv6_rcv+0x28e/0x3c0 net/ipv6/ip6_input.c:307
__netif_receive_skb_one_core+0x114/0x180 net/core/dev.c:5287
__netif_receive_skb+0x27/0x1c0 net/core/dev.c:5401
process_backlog+0x28d/0x7f0 net/core/dev.c:6245
napi_poll net/core/dev.c:6690 [inline]
net_rx_action+0x4a1/0xe80 net/core/dev.c:6760
__do_softirq+0x34c/0xa60 kernel/softirq.c:292
asm_call_on_stack+0xf/0x20 arch/x86/entry/entry_64.S:706
</IRQ>
__run_on_irqstack arch/x86/include/asm/irq_stack.h:22 [inline]
run_on_irqstack_cond arch/x86/include/asm/irq_stack.h:48 [inline]
do_softirq_own_stack+0x111/0x170 arch/x86/kernel/irq_64.c:77
do_softirq kernel/softirq.c:337 [inline]
do_softirq+0x16b/0x1e0 kernel/softirq.c:324
netif_rx_ni+0x3c5/0x650 net/core/dev.c:4836
dev_loopback_xmit+0x204/0x590 net/core/dev.c:3852
NF_HOOK include/linux/netfilter.h:307 [inline]
NF_HOOK include/linux/netfilter.h:301 [inline]
ip6_finish_output2+0x108f/0x17b0 net/ipv6/ip6_output.c:81
ip6_fragment+0xbdb/0x2490 net/ipv6/ip6_output.c:920
__ip6_finish_output net/ipv6/ip6_output.c:141 [inline]
__ip6_finish_output+0x578/0xab0 net/ipv6/ip6_output.c:128
ip6_finish_output+0x34/0x1f0 net/ipv6/ip6_output.c:153
NF_HOOK_COND include/linux/netfilter.h:296 [inline]
ip6_output+0x1db/0x520 net/ipv6/ip6_output.c:176
dst_output include/net/dst.h:443 [inline]
ip6_local_out+0xaf/0x1a0 net/ipv6/output_core.c:179
ip6_send_skb+0xb7/0x340 net/ipv6/ip6_output.c:1865
ip6_push_pending_frames+0xbd/0xe0 net/ipv6/ip6_output.c:1885
rawv6_push_pending_frames net/ipv6/raw.c:613 [inline]
rawv6_sendmsg+0x2add/0x38f0 net/ipv6/raw.c:956
inet_sendmsg+0x99/0xe0 net/ipv4/af_inet.c:817
sock_sendmsg_nosec net/socket.c:652 [inline]
sock_sendmsg+0xcf/0x120 net/socket.c:672
sock_no_sendpage+0xee/0x130 net/core/sock.c:2873
kernel_sendpage net/socket.c:3653 [inline]
sock_sendpage+0xe5/0x140 net/socket.c:945
pipe_to_sendpage+0x2ad/0x380 fs/splice.c:365
splice_from_pipe_feed fs/splice.c:419 [inline]
__splice_from_pipe+0x3dc/0x830 fs/splice.c:543
splice_from_pipe fs/splice.c:578 [inline]
generic_splice_sendpage+0xd4/0x140 fs/splice.c:724
do_splice_from fs/splice.c:736 [inline]
do_splice+0xbb8/0x17a0 fs/splice.c:1043
__do_sys_splice fs/splice.c:1318 [inline]
__se_sys_splice fs/splice.c:1300 [inline]
__x64_sys_splice+0x198/0x250 fs/splice.c:1300
do_syscall_64+0x60/0xe0 arch/x86/entry/common.c:384
entry_SYSCALL_64_after_hwframe+0x44/0xa9
RIP: 0033:0x448bc9
Code: Bad RIP value.
RSP: 002b:00007f17b19a4da8 EFLAGS: 00000246 ORIG_RAX: 0000000000000113
RAX: ffffffffffffffda RBX: 00000000006dec58 RCX: 0000000000448bc9
RDX: 0000000000000005 RSI: 0000000000000000 RDI: 0000000000000003
RBP: 00000000006dec50 R08: 000000000804ffe2 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00000000006dec5c
R13: 00007ffe929ff2df R14: 00007f17b19a59c0 R15: 00000000006dec5c
Allocated by task 6840:
kasan_save_stack+0x1b/0x40 mm/kasan/common.c:48
kasan_set_track mm/kasan/common.c:56 [inline]
__kasan_kmalloc.constprop.0+0xbf/0xd0 mm/kasan/common.c:461
__do_kmalloc mm/slab.c:3655 [inline]
__kmalloc+0x1a8/0x320 mm/slab.c:3664
kmalloc include/linux/slab.h:559 [inline]
kzalloc include/linux/slab.h:666 [inline]
ops_init+0xfb/0x470 net/core/net_namespace.c:141
setup_net+0x2d8/0x850 net/core/net_namespace.c:341
copy_net_ns+0x2cf/0x5e0 net/core/net_namespace.c:482
create_new_namespaces+0x3f6/0xb10 kernel/nsproxy.c:110
unshare_nsproxy_namespaces+0xbd/0x1f0 kernel/nsproxy.c:231
ksys_unshare+0x445/0x8e0 kernel/fork.c:2927
__do_sys_unshare kernel/fork.c:2995 [inline]
__se_sys_unshare kernel/fork.c:2993 [inline]
__x64_sys_unshare+0x2d/0x40 kernel/fork.c:2993
do_syscall_64+0x60/0xe0 arch/x86/entry/common.c:384
entry_SYSCALL_64_after_hwframe+0x44/0xa9
The buggy address belongs to the object at ffff88809a0d6800
which belongs to the cache kmalloc-512 of size 512
The buggy address is located 384 bytes to the right of
512-byte region [ffff88809a0d6800, ffff88809a0d6a00)
The buggy address belongs to the page:
page:000000008c78ee7f refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x9a0d6
flags: 0xfffe0000000200(slab)
raw: 00fffe0000000200 ffffea0002783b08 ffffea00026054c8 ffff8880aa000600
raw: 0000000000000000 ffff88809a0d6000 0000000100000004 0000000000000000
page dumped because: kasan: bad access detected
Memory state around the buggy address:
ffff88809a0d6a80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
ffff88809a0d6b00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
>ffff88809a0d6b80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
^
ffff88809a0d6c00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
ffff88809a0d6c80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
==================================================================
---
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#status for how to communicate with syzbot.
For information about bisection process see: https://goo.gl/tpsmEJ#bisection
syzbot can test patches for this bug, for details see:
https://goo.gl/tpsmEJ#testing-patches
^ permalink raw reply [flat|nested] 5+ messages in thread
* Re: KASAN: slab-out-of-bounds Read in __xfrm6_tunnel_spi_lookup
2020-07-13 22:04 KASAN: slab-out-of-bounds Read in __xfrm6_tunnel_spi_lookup syzbot
@ 2020-07-14 9:37 ` Steffen Klassert
2020-07-14 14:01 ` Xin Long
2020-07-15 9:18 ` Xin Long
0 siblings, 2 replies; 5+ messages in thread
From: Steffen Klassert @ 2020-07-14 9:37 UTC (permalink / raw)
To: syzbot, Xin Long
Cc: davem, herbert, kuba, kuznet, linux-kernel, netdev,
syzkaller-bugs, yoshfuji
Xin,
this looks a bit like it was introduced with one of your recent
patches. Can you please look into that?
Thanks!
On Mon, Jul 13, 2020 at 03:04:16PM -0700, syzbot wrote:
> Hello,
>
> syzbot found the following crash on:
>
> HEAD commit: be978f8f Add linux-next specific files for 20200713
> git tree: linux-next
> console output: https://syzkaller.appspot.com/x/log.txt?x=1225f8c7100000
> kernel config: https://syzkaller.appspot.com/x/.config?x=3fe4fccb94cbc1a6
> dashboard link: https://syzkaller.appspot.com/bug?extid=ea9832f8ae588deb0205
> compiler: gcc (GCC) 10.1.0-syz 20200507
> syz repro: https://syzkaller.appspot.com/x/repro.syz?x=17270713100000
> C reproducer: https://syzkaller.appspot.com/x/repro.c?x=126c0ffb100000
>
> Bisection is inconclusive: the first bad commit could be any of:
>
> 08622869 ip6_vti: support IP6IP6 tunnel processing with .cb_handler
> e6ce6457 ip_vti: support IPIP6 tunnel processing
> 2ab110cb ip6_vti: support IP6IP tunnel processing
> 87e66b96 ip_vti: support IPIP tunnel processing with .cb_handler
> 86afc703 tunnel6: add tunnel6_input_afinfo for ipip and ipv6 tunnels
> d5a7a505 ipcomp: assign if_id to child tunnel from parent tunnel
> 6df2db5d tunnel4: add cb_handler to struct xfrm_tunnel
> d7b360c2 xfrm: interface: support IP6IP6 and IP6IP tunnels processing with .cb_handler
> 1475ee0a xfrm: add is_ipip to struct xfrm_input_afinfo
> da9bbf05 xfrm: interface: support IPIP and IPIP6 tunnels processing with .cb_handler
> 2d4c7986 Merge remote-tracking branch 'origin/testing'
> 428d2459 xfrm: introduce oseq-may-wrap flag
> bdf0acad Merge remote-tracking branch 'ipsec-next/master'
>
> bisection log: https://syzkaller.appspot.com/x/bisect.txt?x=137de95d100000
>
> IMPORTANT: if you fix the bug, please add the following tag to the commit:
> Reported-by: syzbot+ea9832f8ae588deb0205@syzkaller.appspotmail.com
>
> ==================================================================
> BUG: KASAN: slab-out-of-bounds in __xfrm6_tunnel_spi_lookup+0x3a9/0x3b0 net/ipv6/xfrm6_tunnel.c:79
> Read of size 8 at addr ffff88809a0d6b80 by task syz-executor016/7061
> CPU: 1 PID: 7061 Comm: syz-executor016 Not tainted 5.8.0-rc4-next-20200713-syzkaller #0
> 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+0x18f/0x20d lib/dump_stack.c:118
> print_address_description.constprop.0.cold+0xae/0x497 mm/kasan/report.c:383
> __kasan_report mm/kasan/report.c:513 [inline]
> kasan_report.cold+0x1f/0x37 mm/kasan/report.c:530
> __xfrm6_tunnel_spi_lookup+0x3a9/0x3b0 net/ipv6/xfrm6_tunnel.c:79
> xfrm6_tunnel_spi_lookup+0x8a/0x1d0 net/ipv6/xfrm6_tunnel.c:95
> xfrmi6_rcv_tunnel+0xb9/0x100 net/xfrm/xfrm_interface.c:810
> tunnel46_rcv+0xef/0x2b0 net/ipv6/tunnel6.c:193
> ip6_protocol_deliver_rcu+0x2e8/0x1670 net/ipv6/ip6_input.c:433
> ip6_input_finish+0x7f/0x160 net/ipv6/ip6_input.c:474
> NF_HOOK include/linux/netfilter.h:307 [inline]
> NF_HOOK include/linux/netfilter.h:301 [inline]
> ip6_input+0x9c/0xd0 net/ipv6/ip6_input.c:483
> ip6_mc_input+0x411/0xea0 net/ipv6/ip6_input.c:577
> dst_input include/net/dst.h:449 [inline]
> ip6_rcv_finish net/ipv6/ip6_input.c:76 [inline]
> NF_HOOK include/linux/netfilter.h:307 [inline]
> NF_HOOK include/linux/netfilter.h:301 [inline]
> ipv6_rcv+0x28e/0x3c0 net/ipv6/ip6_input.c:307
> __netif_receive_skb_one_core+0x114/0x180 net/core/dev.c:5287
> __netif_receive_skb+0x27/0x1c0 net/core/dev.c:5401
> process_backlog+0x28d/0x7f0 net/core/dev.c:6245
> napi_poll net/core/dev.c:6690 [inline]
> net_rx_action+0x4a1/0xe80 net/core/dev.c:6760
> __do_softirq+0x34c/0xa60 kernel/softirq.c:292
> asm_call_on_stack+0xf/0x20 arch/x86/entry/entry_64.S:706
> </IRQ>
> __run_on_irqstack arch/x86/include/asm/irq_stack.h:22 [inline]
> run_on_irqstack_cond arch/x86/include/asm/irq_stack.h:48 [inline]
> do_softirq_own_stack+0x111/0x170 arch/x86/kernel/irq_64.c:77
> do_softirq kernel/softirq.c:337 [inline]
> do_softirq+0x16b/0x1e0 kernel/softirq.c:324
> netif_rx_ni+0x3c5/0x650 net/core/dev.c:4836
> dev_loopback_xmit+0x204/0x590 net/core/dev.c:3852
> NF_HOOK include/linux/netfilter.h:307 [inline]
> NF_HOOK include/linux/netfilter.h:301 [inline]
> ip6_finish_output2+0x108f/0x17b0 net/ipv6/ip6_output.c:81
> ip6_fragment+0xbdb/0x2490 net/ipv6/ip6_output.c:920
> __ip6_finish_output net/ipv6/ip6_output.c:141 [inline]
> __ip6_finish_output+0x578/0xab0 net/ipv6/ip6_output.c:128
> ip6_finish_output+0x34/0x1f0 net/ipv6/ip6_output.c:153
> NF_HOOK_COND include/linux/netfilter.h:296 [inline]
> ip6_output+0x1db/0x520 net/ipv6/ip6_output.c:176
> dst_output include/net/dst.h:443 [inline]
> ip6_local_out+0xaf/0x1a0 net/ipv6/output_core.c:179
> ip6_send_skb+0xb7/0x340 net/ipv6/ip6_output.c:1865
> ip6_push_pending_frames+0xbd/0xe0 net/ipv6/ip6_output.c:1885
> rawv6_push_pending_frames net/ipv6/raw.c:613 [inline]
> rawv6_sendmsg+0x2add/0x38f0 net/ipv6/raw.c:956
> inet_sendmsg+0x99/0xe0 net/ipv4/af_inet.c:817
> sock_sendmsg_nosec net/socket.c:652 [inline]
> sock_sendmsg+0xcf/0x120 net/socket.c:672
> sock_no_sendpage+0xee/0x130 net/core/sock.c:2873
> kernel_sendpage net/socket.c:3653 [inline]
> sock_sendpage+0xe5/0x140 net/socket.c:945
> pipe_to_sendpage+0x2ad/0x380 fs/splice.c:365
> splice_from_pipe_feed fs/splice.c:419 [inline]
> __splice_from_pipe+0x3dc/0x830 fs/splice.c:543
> splice_from_pipe fs/splice.c:578 [inline]
> generic_splice_sendpage+0xd4/0x140 fs/splice.c:724
> do_splice_from fs/splice.c:736 [inline]
> do_splice+0xbb8/0x17a0 fs/splice.c:1043
> __do_sys_splice fs/splice.c:1318 [inline]
> __se_sys_splice fs/splice.c:1300 [inline]
> __x64_sys_splice+0x198/0x250 fs/splice.c:1300
> do_syscall_64+0x60/0xe0 arch/x86/entry/common.c:384
> entry_SYSCALL_64_after_hwframe+0x44/0xa9
> RIP: 0033:0x448bc9
> Code: Bad RIP value.
> RSP: 002b:00007f17b19a4da8 EFLAGS: 00000246 ORIG_RAX: 0000000000000113
> RAX: ffffffffffffffda RBX: 00000000006dec58 RCX: 0000000000448bc9
> RDX: 0000000000000005 RSI: 0000000000000000 RDI: 0000000000000003
> RBP: 00000000006dec50 R08: 000000000804ffe2 R09: 0000000000000000
> R10: 0000000000000000 R11: 0000000000000246 R12: 00000000006dec5c
> R13: 00007ffe929ff2df R14: 00007f17b19a59c0 R15: 00000000006dec5c
> Allocated by task 6840:
> kasan_save_stack+0x1b/0x40 mm/kasan/common.c:48
> kasan_set_track mm/kasan/common.c:56 [inline]
> __kasan_kmalloc.constprop.0+0xbf/0xd0 mm/kasan/common.c:461
> __do_kmalloc mm/slab.c:3655 [inline]
> __kmalloc+0x1a8/0x320 mm/slab.c:3664
> kmalloc include/linux/slab.h:559 [inline]
> kzalloc include/linux/slab.h:666 [inline]
> ops_init+0xfb/0x470 net/core/net_namespace.c:141
> setup_net+0x2d8/0x850 net/core/net_namespace.c:341
> copy_net_ns+0x2cf/0x5e0 net/core/net_namespace.c:482
> create_new_namespaces+0x3f6/0xb10 kernel/nsproxy.c:110
> unshare_nsproxy_namespaces+0xbd/0x1f0 kernel/nsproxy.c:231
> ksys_unshare+0x445/0x8e0 kernel/fork.c:2927
> __do_sys_unshare kernel/fork.c:2995 [inline]
> __se_sys_unshare kernel/fork.c:2993 [inline]
> __x64_sys_unshare+0x2d/0x40 kernel/fork.c:2993
> do_syscall_64+0x60/0xe0 arch/x86/entry/common.c:384
> entry_SYSCALL_64_after_hwframe+0x44/0xa9
> The buggy address belongs to the object at ffff88809a0d6800
> which belongs to the cache kmalloc-512 of size 512
> The buggy address is located 384 bytes to the right of
> 512-byte region [ffff88809a0d6800, ffff88809a0d6a00)
> The buggy address belongs to the page:
> page:000000008c78ee7f refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x9a0d6
> flags: 0xfffe0000000200(slab)
> raw: 00fffe0000000200 ffffea0002783b08 ffffea00026054c8 ffff8880aa000600
> raw: 0000000000000000 ffff88809a0d6000 0000000100000004 0000000000000000
> page dumped because: kasan: bad access detected
> Memory state around the buggy address:
> ffff88809a0d6a80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
> ffff88809a0d6b00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
> >ffff88809a0d6b80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
> ^
> ffff88809a0d6c00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
> ffff88809a0d6c80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
> ==================================================================
>
>
> ---
> 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#status for how to communicate with syzbot.
> For information about bisection process see: https://goo.gl/tpsmEJ#bisection
> syzbot can test patches for this bug, for details see:
> https://goo.gl/tpsmEJ#testing-patches
^ permalink raw reply [flat|nested] 5+ messages in thread
* Re: KASAN: slab-out-of-bounds Read in __xfrm6_tunnel_spi_lookup
2020-07-14 9:37 ` Steffen Klassert
@ 2020-07-14 14:01 ` Xin Long
2020-07-15 9:18 ` Xin Long
1 sibling, 0 replies; 5+ messages in thread
From: Xin Long @ 2020-07-14 14:01 UTC (permalink / raw)
To: Steffen Klassert
Cc: syzbot, davem, Herbert Xu, Jakub Kicinski, kuznet, LKML,
network dev, syzkaller-bugs, yoshfuji
On Tue, Jul 14, 2020 at 5:37 PM Steffen Klassert
<steffen.klassert@secunet.com> wrote:
>
> Xin,
>
> this looks a bit like it was introduced with one of your recent
> patches. Can you please look into that?
Yes, I'm looking into it.
Thanks.
>
> Thanks!
>
> On Mon, Jul 13, 2020 at 03:04:16PM -0700, syzbot wrote:
> > Hello,
> >
> > syzbot found the following crash on:
> >
> > HEAD commit: be978f8f Add linux-next specific files for 20200713
> > git tree: linux-next
> > console output: https://syzkaller.appspot.com/x/log.txt?x=1225f8c7100000
> > kernel config: https://syzkaller.appspot.com/x/.config?x=3fe4fccb94cbc1a6
> > dashboard link: https://syzkaller.appspot.com/bug?extid=ea9832f8ae588deb0205
> > compiler: gcc (GCC) 10.1.0-syz 20200507
> > syz repro: https://syzkaller.appspot.com/x/repro.syz?x=17270713100000
> > C reproducer: https://syzkaller.appspot.com/x/repro.c?x=126c0ffb100000
> >
> > Bisection is inconclusive: the first bad commit could be any of:
> >
> > 08622869 ip6_vti: support IP6IP6 tunnel processing with .cb_handler
> > e6ce6457 ip_vti: support IPIP6 tunnel processing
> > 2ab110cb ip6_vti: support IP6IP tunnel processing
> > 87e66b96 ip_vti: support IPIP tunnel processing with .cb_handler
> > 86afc703 tunnel6: add tunnel6_input_afinfo for ipip and ipv6 tunnels
> > d5a7a505 ipcomp: assign if_id to child tunnel from parent tunnel
> > 6df2db5d tunnel4: add cb_handler to struct xfrm_tunnel
> > d7b360c2 xfrm: interface: support IP6IP6 and IP6IP tunnels processing with .cb_handler
> > 1475ee0a xfrm: add is_ipip to struct xfrm_input_afinfo
> > da9bbf05 xfrm: interface: support IPIP and IPIP6 tunnels processing with .cb_handler
> > 2d4c7986 Merge remote-tracking branch 'origin/testing'
> > 428d2459 xfrm: introduce oseq-may-wrap flag
> > bdf0acad Merge remote-tracking branch 'ipsec-next/master'
> >
> > bisection log: https://syzkaller.appspot.com/x/bisect.txt?x=137de95d100000
> >
> > IMPORTANT: if you fix the bug, please add the following tag to the commit:
> > Reported-by: syzbot+ea9832f8ae588deb0205@syzkaller.appspotmail.com
> >
> > ==================================================================
> > BUG: KASAN: slab-out-of-bounds in __xfrm6_tunnel_spi_lookup+0x3a9/0x3b0 net/ipv6/xfrm6_tunnel.c:79
> > Read of size 8 at addr ffff88809a0d6b80 by task syz-executor016/7061
> > CPU: 1 PID: 7061 Comm: syz-executor016 Not tainted 5.8.0-rc4-next-20200713-syzkaller #0
> > 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+0x18f/0x20d lib/dump_stack.c:118
> > print_address_description.constprop.0.cold+0xae/0x497 mm/kasan/report.c:383
> > __kasan_report mm/kasan/report.c:513 [inline]
> > kasan_report.cold+0x1f/0x37 mm/kasan/report.c:530
> > __xfrm6_tunnel_spi_lookup+0x3a9/0x3b0 net/ipv6/xfrm6_tunnel.c:79
> > xfrm6_tunnel_spi_lookup+0x8a/0x1d0 net/ipv6/xfrm6_tunnel.c:95
> > xfrmi6_rcv_tunnel+0xb9/0x100 net/xfrm/xfrm_interface.c:810
> > tunnel46_rcv+0xef/0x2b0 net/ipv6/tunnel6.c:193
> > ip6_protocol_deliver_rcu+0x2e8/0x1670 net/ipv6/ip6_input.c:433
> > ip6_input_finish+0x7f/0x160 net/ipv6/ip6_input.c:474
> > NF_HOOK include/linux/netfilter.h:307 [inline]
> > NF_HOOK include/linux/netfilter.h:301 [inline]
> > ip6_input+0x9c/0xd0 net/ipv6/ip6_input.c:483
> > ip6_mc_input+0x411/0xea0 net/ipv6/ip6_input.c:577
> > dst_input include/net/dst.h:449 [inline]
> > ip6_rcv_finish net/ipv6/ip6_input.c:76 [inline]
> > NF_HOOK include/linux/netfilter.h:307 [inline]
> > NF_HOOK include/linux/netfilter.h:301 [inline]
> > ipv6_rcv+0x28e/0x3c0 net/ipv6/ip6_input.c:307
> > __netif_receive_skb_one_core+0x114/0x180 net/core/dev.c:5287
> > __netif_receive_skb+0x27/0x1c0 net/core/dev.c:5401
> > process_backlog+0x28d/0x7f0 net/core/dev.c:6245
> > napi_poll net/core/dev.c:6690 [inline]
> > net_rx_action+0x4a1/0xe80 net/core/dev.c:6760
> > __do_softirq+0x34c/0xa60 kernel/softirq.c:292
> > asm_call_on_stack+0xf/0x20 arch/x86/entry/entry_64.S:706
> > </IRQ>
> > __run_on_irqstack arch/x86/include/asm/irq_stack.h:22 [inline]
> > run_on_irqstack_cond arch/x86/include/asm/irq_stack.h:48 [inline]
> > do_softirq_own_stack+0x111/0x170 arch/x86/kernel/irq_64.c:77
> > do_softirq kernel/softirq.c:337 [inline]
> > do_softirq+0x16b/0x1e0 kernel/softirq.c:324
> > netif_rx_ni+0x3c5/0x650 net/core/dev.c:4836
> > dev_loopback_xmit+0x204/0x590 net/core/dev.c:3852
> > NF_HOOK include/linux/netfilter.h:307 [inline]
> > NF_HOOK include/linux/netfilter.h:301 [inline]
> > ip6_finish_output2+0x108f/0x17b0 net/ipv6/ip6_output.c:81
> > ip6_fragment+0xbdb/0x2490 net/ipv6/ip6_output.c:920
> > __ip6_finish_output net/ipv6/ip6_output.c:141 [inline]
> > __ip6_finish_output+0x578/0xab0 net/ipv6/ip6_output.c:128
> > ip6_finish_output+0x34/0x1f0 net/ipv6/ip6_output.c:153
> > NF_HOOK_COND include/linux/netfilter.h:296 [inline]
> > ip6_output+0x1db/0x520 net/ipv6/ip6_output.c:176
> > dst_output include/net/dst.h:443 [inline]
> > ip6_local_out+0xaf/0x1a0 net/ipv6/output_core.c:179
> > ip6_send_skb+0xb7/0x340 net/ipv6/ip6_output.c:1865
> > ip6_push_pending_frames+0xbd/0xe0 net/ipv6/ip6_output.c:1885
> > rawv6_push_pending_frames net/ipv6/raw.c:613 [inline]
> > rawv6_sendmsg+0x2add/0x38f0 net/ipv6/raw.c:956
> > inet_sendmsg+0x99/0xe0 net/ipv4/af_inet.c:817
> > sock_sendmsg_nosec net/socket.c:652 [inline]
> > sock_sendmsg+0xcf/0x120 net/socket.c:672
> > sock_no_sendpage+0xee/0x130 net/core/sock.c:2873
> > kernel_sendpage net/socket.c:3653 [inline]
> > sock_sendpage+0xe5/0x140 net/socket.c:945
> > pipe_to_sendpage+0x2ad/0x380 fs/splice.c:365
> > splice_from_pipe_feed fs/splice.c:419 [inline]
> > __splice_from_pipe+0x3dc/0x830 fs/splice.c:543
> > splice_from_pipe fs/splice.c:578 [inline]
> > generic_splice_sendpage+0xd4/0x140 fs/splice.c:724
> > do_splice_from fs/splice.c:736 [inline]
> > do_splice+0xbb8/0x17a0 fs/splice.c:1043
> > __do_sys_splice fs/splice.c:1318 [inline]
> > __se_sys_splice fs/splice.c:1300 [inline]
> > __x64_sys_splice+0x198/0x250 fs/splice.c:1300
> > do_syscall_64+0x60/0xe0 arch/x86/entry/common.c:384
> > entry_SYSCALL_64_after_hwframe+0x44/0xa9
> > RIP: 0033:0x448bc9
> > Code: Bad RIP value.
> > RSP: 002b:00007f17b19a4da8 EFLAGS: 00000246 ORIG_RAX: 0000000000000113
> > RAX: ffffffffffffffda RBX: 00000000006dec58 RCX: 0000000000448bc9
> > RDX: 0000000000000005 RSI: 0000000000000000 RDI: 0000000000000003
> > RBP: 00000000006dec50 R08: 000000000804ffe2 R09: 0000000000000000
> > R10: 0000000000000000 R11: 0000000000000246 R12: 00000000006dec5c
> > R13: 00007ffe929ff2df R14: 00007f17b19a59c0 R15: 00000000006dec5c
> > Allocated by task 6840:
> > kasan_save_stack+0x1b/0x40 mm/kasan/common.c:48
> > kasan_set_track mm/kasan/common.c:56 [inline]
> > __kasan_kmalloc.constprop.0+0xbf/0xd0 mm/kasan/common.c:461
> > __do_kmalloc mm/slab.c:3655 [inline]
> > __kmalloc+0x1a8/0x320 mm/slab.c:3664
> > kmalloc include/linux/slab.h:559 [inline]
> > kzalloc include/linux/slab.h:666 [inline]
> > ops_init+0xfb/0x470 net/core/net_namespace.c:141
> > setup_net+0x2d8/0x850 net/core/net_namespace.c:341
> > copy_net_ns+0x2cf/0x5e0 net/core/net_namespace.c:482
> > create_new_namespaces+0x3f6/0xb10 kernel/nsproxy.c:110
> > unshare_nsproxy_namespaces+0xbd/0x1f0 kernel/nsproxy.c:231
> > ksys_unshare+0x445/0x8e0 kernel/fork.c:2927
> > __do_sys_unshare kernel/fork.c:2995 [inline]
> > __se_sys_unshare kernel/fork.c:2993 [inline]
> > __x64_sys_unshare+0x2d/0x40 kernel/fork.c:2993
> > do_syscall_64+0x60/0xe0 arch/x86/entry/common.c:384
> > entry_SYSCALL_64_after_hwframe+0x44/0xa9
> > The buggy address belongs to the object at ffff88809a0d6800
> > which belongs to the cache kmalloc-512 of size 512
> > The buggy address is located 384 bytes to the right of
> > 512-byte region [ffff88809a0d6800, ffff88809a0d6a00)
> > The buggy address belongs to the page:
> > page:000000008c78ee7f refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x9a0d6
> > flags: 0xfffe0000000200(slab)
> > raw: 00fffe0000000200 ffffea0002783b08 ffffea00026054c8 ffff8880aa000600
> > raw: 0000000000000000 ffff88809a0d6000 0000000100000004 0000000000000000
> > page dumped because: kasan: bad access detected
> > Memory state around the buggy address:
> > ffff88809a0d6a80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
> > ffff88809a0d6b00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
> > >ffff88809a0d6b80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
> > ^
> > ffff88809a0d6c00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
> > ffff88809a0d6c80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
> > ==================================================================
> >
> >
> > ---
> > 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#status for how to communicate with syzbot.
> > For information about bisection process see: https://goo.gl/tpsmEJ#bisection
> > syzbot can test patches for this bug, for details see:
> > https://goo.gl/tpsmEJ#testing-patches
^ permalink raw reply [flat|nested] 5+ messages in thread
* Re: KASAN: slab-out-of-bounds Read in __xfrm6_tunnel_spi_lookup
2020-07-14 9:37 ` Steffen Klassert
2020-07-14 14:01 ` Xin Long
@ 2020-07-15 9:18 ` Xin Long
2020-07-16 6:33 ` Steffen Klassert
1 sibling, 1 reply; 5+ messages in thread
From: Xin Long @ 2020-07-15 9:18 UTC (permalink / raw)
To: Steffen Klassert
Cc: syzbot, davem, Herbert Xu, Jakub Kicinski, kuznet, LKML,
network dev, syzkaller-bugs, yoshfuji
Hi, Steffen,
I've confirmed the patchset I posted yesterday would fix this:
[PATCH ipsec-next 0/3] xfrm: not register one xfrm(6)_tunnel object twice
Thanks.
On Tue, Jul 14, 2020 at 5:37 PM Steffen Klassert
<steffen.klassert@secunet.com> wrote:
>
> Xin,
>
> this looks a bit like it was introduced with one of your recent
> patches. Can you please look into that?
>
> Thanks!
>
> On Mon, Jul 13, 2020 at 03:04:16PM -0700, syzbot wrote:
> > Hello,
> >
> > syzbot found the following crash on:
> >
> > HEAD commit: be978f8f Add linux-next specific files for 20200713
> > git tree: linux-next
> > console output: https://syzkaller.appspot.com/x/log.txt?x=1225f8c7100000
> > kernel config: https://syzkaller.appspot.com/x/.config?x=3fe4fccb94cbc1a6
> > dashboard link: https://syzkaller.appspot.com/bug?extid=ea9832f8ae588deb0205
> > compiler: gcc (GCC) 10.1.0-syz 20200507
> > syz repro: https://syzkaller.appspot.com/x/repro.syz?x=17270713100000
> > C reproducer: https://syzkaller.appspot.com/x/repro.c?x=126c0ffb100000
> >
> > Bisection is inconclusive: the first bad commit could be any of:
> >
> > 08622869 ip6_vti: support IP6IP6 tunnel processing with .cb_handler
> > e6ce6457 ip_vti: support IPIP6 tunnel processing
> > 2ab110cb ip6_vti: support IP6IP tunnel processing
> > 87e66b96 ip_vti: support IPIP tunnel processing with .cb_handler
> > 86afc703 tunnel6: add tunnel6_input_afinfo for ipip and ipv6 tunnels
> > d5a7a505 ipcomp: assign if_id to child tunnel from parent tunnel
> > 6df2db5d tunnel4: add cb_handler to struct xfrm_tunnel
> > d7b360c2 xfrm: interface: support IP6IP6 and IP6IP tunnels processing with .cb_handler
> > 1475ee0a xfrm: add is_ipip to struct xfrm_input_afinfo
> > da9bbf05 xfrm: interface: support IPIP and IPIP6 tunnels processing with .cb_handler
> > 2d4c7986 Merge remote-tracking branch 'origin/testing'
> > 428d2459 xfrm: introduce oseq-may-wrap flag
> > bdf0acad Merge remote-tracking branch 'ipsec-next/master'
> >
> > bisection log: https://syzkaller.appspot.com/x/bisect.txt?x=137de95d100000
> >
> > IMPORTANT: if you fix the bug, please add the following tag to the commit:
> > Reported-by: syzbot+ea9832f8ae588deb0205@syzkaller.appspotmail.com
> >
> > ==================================================================
> > BUG: KASAN: slab-out-of-bounds in __xfrm6_tunnel_spi_lookup+0x3a9/0x3b0 net/ipv6/xfrm6_tunnel.c:79
> > Read of size 8 at addr ffff88809a0d6b80 by task syz-executor016/7061
> > CPU: 1 PID: 7061 Comm: syz-executor016 Not tainted 5.8.0-rc4-next-20200713-syzkaller #0
> > 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+0x18f/0x20d lib/dump_stack.c:118
> > print_address_description.constprop.0.cold+0xae/0x497 mm/kasan/report.c:383
> > __kasan_report mm/kasan/report.c:513 [inline]
> > kasan_report.cold+0x1f/0x37 mm/kasan/report.c:530
> > __xfrm6_tunnel_spi_lookup+0x3a9/0x3b0 net/ipv6/xfrm6_tunnel.c:79
> > xfrm6_tunnel_spi_lookup+0x8a/0x1d0 net/ipv6/xfrm6_tunnel.c:95
> > xfrmi6_rcv_tunnel+0xb9/0x100 net/xfrm/xfrm_interface.c:810
> > tunnel46_rcv+0xef/0x2b0 net/ipv6/tunnel6.c:193
> > ip6_protocol_deliver_rcu+0x2e8/0x1670 net/ipv6/ip6_input.c:433
> > ip6_input_finish+0x7f/0x160 net/ipv6/ip6_input.c:474
> > NF_HOOK include/linux/netfilter.h:307 [inline]
> > NF_HOOK include/linux/netfilter.h:301 [inline]
> > ip6_input+0x9c/0xd0 net/ipv6/ip6_input.c:483
> > ip6_mc_input+0x411/0xea0 net/ipv6/ip6_input.c:577
> > dst_input include/net/dst.h:449 [inline]
> > ip6_rcv_finish net/ipv6/ip6_input.c:76 [inline]
> > NF_HOOK include/linux/netfilter.h:307 [inline]
> > NF_HOOK include/linux/netfilter.h:301 [inline]
> > ipv6_rcv+0x28e/0x3c0 net/ipv6/ip6_input.c:307
> > __netif_receive_skb_one_core+0x114/0x180 net/core/dev.c:5287
> > __netif_receive_skb+0x27/0x1c0 net/core/dev.c:5401
> > process_backlog+0x28d/0x7f0 net/core/dev.c:6245
> > napi_poll net/core/dev.c:6690 [inline]
> > net_rx_action+0x4a1/0xe80 net/core/dev.c:6760
> > __do_softirq+0x34c/0xa60 kernel/softirq.c:292
> > asm_call_on_stack+0xf/0x20 arch/x86/entry/entry_64.S:706
> > </IRQ>
> > __run_on_irqstack arch/x86/include/asm/irq_stack.h:22 [inline]
> > run_on_irqstack_cond arch/x86/include/asm/irq_stack.h:48 [inline]
> > do_softirq_own_stack+0x111/0x170 arch/x86/kernel/irq_64.c:77
> > do_softirq kernel/softirq.c:337 [inline]
> > do_softirq+0x16b/0x1e0 kernel/softirq.c:324
> > netif_rx_ni+0x3c5/0x650 net/core/dev.c:4836
> > dev_loopback_xmit+0x204/0x590 net/core/dev.c:3852
> > NF_HOOK include/linux/netfilter.h:307 [inline]
> > NF_HOOK include/linux/netfilter.h:301 [inline]
> > ip6_finish_output2+0x108f/0x17b0 net/ipv6/ip6_output.c:81
> > ip6_fragment+0xbdb/0x2490 net/ipv6/ip6_output.c:920
> > __ip6_finish_output net/ipv6/ip6_output.c:141 [inline]
> > __ip6_finish_output+0x578/0xab0 net/ipv6/ip6_output.c:128
> > ip6_finish_output+0x34/0x1f0 net/ipv6/ip6_output.c:153
> > NF_HOOK_COND include/linux/netfilter.h:296 [inline]
> > ip6_output+0x1db/0x520 net/ipv6/ip6_output.c:176
> > dst_output include/net/dst.h:443 [inline]
> > ip6_local_out+0xaf/0x1a0 net/ipv6/output_core.c:179
> > ip6_send_skb+0xb7/0x340 net/ipv6/ip6_output.c:1865
> > ip6_push_pending_frames+0xbd/0xe0 net/ipv6/ip6_output.c:1885
> > rawv6_push_pending_frames net/ipv6/raw.c:613 [inline]
> > rawv6_sendmsg+0x2add/0x38f0 net/ipv6/raw.c:956
> > inet_sendmsg+0x99/0xe0 net/ipv4/af_inet.c:817
> > sock_sendmsg_nosec net/socket.c:652 [inline]
> > sock_sendmsg+0xcf/0x120 net/socket.c:672
> > sock_no_sendpage+0xee/0x130 net/core/sock.c:2873
> > kernel_sendpage net/socket.c:3653 [inline]
> > sock_sendpage+0xe5/0x140 net/socket.c:945
> > pipe_to_sendpage+0x2ad/0x380 fs/splice.c:365
> > splice_from_pipe_feed fs/splice.c:419 [inline]
> > __splice_from_pipe+0x3dc/0x830 fs/splice.c:543
> > splice_from_pipe fs/splice.c:578 [inline]
> > generic_splice_sendpage+0xd4/0x140 fs/splice.c:724
> > do_splice_from fs/splice.c:736 [inline]
> > do_splice+0xbb8/0x17a0 fs/splice.c:1043
> > __do_sys_splice fs/splice.c:1318 [inline]
> > __se_sys_splice fs/splice.c:1300 [inline]
> > __x64_sys_splice+0x198/0x250 fs/splice.c:1300
> > do_syscall_64+0x60/0xe0 arch/x86/entry/common.c:384
> > entry_SYSCALL_64_after_hwframe+0x44/0xa9
> > RIP: 0033:0x448bc9
> > Code: Bad RIP value.
> > RSP: 002b:00007f17b19a4da8 EFLAGS: 00000246 ORIG_RAX: 0000000000000113
> > RAX: ffffffffffffffda RBX: 00000000006dec58 RCX: 0000000000448bc9
> > RDX: 0000000000000005 RSI: 0000000000000000 RDI: 0000000000000003
> > RBP: 00000000006dec50 R08: 000000000804ffe2 R09: 0000000000000000
> > R10: 0000000000000000 R11: 0000000000000246 R12: 00000000006dec5c
> > R13: 00007ffe929ff2df R14: 00007f17b19a59c0 R15: 00000000006dec5c
> > Allocated by task 6840:
> > kasan_save_stack+0x1b/0x40 mm/kasan/common.c:48
> > kasan_set_track mm/kasan/common.c:56 [inline]
> > __kasan_kmalloc.constprop.0+0xbf/0xd0 mm/kasan/common.c:461
> > __do_kmalloc mm/slab.c:3655 [inline]
> > __kmalloc+0x1a8/0x320 mm/slab.c:3664
> > kmalloc include/linux/slab.h:559 [inline]
> > kzalloc include/linux/slab.h:666 [inline]
> > ops_init+0xfb/0x470 net/core/net_namespace.c:141
> > setup_net+0x2d8/0x850 net/core/net_namespace.c:341
> > copy_net_ns+0x2cf/0x5e0 net/core/net_namespace.c:482
> > create_new_namespaces+0x3f6/0xb10 kernel/nsproxy.c:110
> > unshare_nsproxy_namespaces+0xbd/0x1f0 kernel/nsproxy.c:231
> > ksys_unshare+0x445/0x8e0 kernel/fork.c:2927
> > __do_sys_unshare kernel/fork.c:2995 [inline]
> > __se_sys_unshare kernel/fork.c:2993 [inline]
> > __x64_sys_unshare+0x2d/0x40 kernel/fork.c:2993
> > do_syscall_64+0x60/0xe0 arch/x86/entry/common.c:384
> > entry_SYSCALL_64_after_hwframe+0x44/0xa9
> > The buggy address belongs to the object at ffff88809a0d6800
> > which belongs to the cache kmalloc-512 of size 512
> > The buggy address is located 384 bytes to the right of
> > 512-byte region [ffff88809a0d6800, ffff88809a0d6a00)
> > The buggy address belongs to the page:
> > page:000000008c78ee7f refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x9a0d6
> > flags: 0xfffe0000000200(slab)
> > raw: 00fffe0000000200 ffffea0002783b08 ffffea00026054c8 ffff8880aa000600
> > raw: 0000000000000000 ffff88809a0d6000 0000000100000004 0000000000000000
> > page dumped because: kasan: bad access detected
> > Memory state around the buggy address:
> > ffff88809a0d6a80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
> > ffff88809a0d6b00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
> > >ffff88809a0d6b80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
> > ^
> > ffff88809a0d6c00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
> > ffff88809a0d6c80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
> > ==================================================================
> >
> >
> > ---
> > 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#status for how to communicate with syzbot.
> > For information about bisection process see: https://goo.gl/tpsmEJ#bisection
> > syzbot can test patches for this bug, for details see:
> > https://goo.gl/tpsmEJ#testing-patches
^ permalink raw reply [flat|nested] 5+ messages in thread
* Re: KASAN: slab-out-of-bounds Read in __xfrm6_tunnel_spi_lookup
2020-07-15 9:18 ` Xin Long
@ 2020-07-16 6:33 ` Steffen Klassert
0 siblings, 0 replies; 5+ messages in thread
From: Steffen Klassert @ 2020-07-16 6:33 UTC (permalink / raw)
To: Xin Long
Cc: syzbot, davem, Herbert Xu, Jakub Kicinski, kuznet, LKML,
network dev, syzkaller-bugs, yoshfuji
On Wed, Jul 15, 2020 at 05:18:36PM +0800, Xin Long wrote:
> Hi, Steffen,
>
> I've confirmed the patchset I posted yesterday would fix this:
>
> [PATCH ipsec-next 0/3] xfrm: not register one xfrm(6)_tunnel object twice
Thanks for the confirmation! That patchset is now applied
to ipsec-next.
^ permalink raw reply [flat|nested] 5+ messages in thread
end of thread, other threads:[~2020-07-16 6:33 UTC | newest]
Thread overview: 5+ messages (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
2020-07-13 22:04 KASAN: slab-out-of-bounds Read in __xfrm6_tunnel_spi_lookup syzbot
2020-07-14 9:37 ` Steffen Klassert
2020-07-14 14:01 ` Xin Long
2020-07-15 9:18 ` Xin Long
2020-07-16 6:33 ` Steffen Klassert
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