From: syzbot <syzbot+4f789823c1abc5accf13@syzkaller.appspotmail.com>
To: andrii@kernel.org, ast@kernel.org, axboe@kernel.dk,
bpf@vger.kernel.org, daniel@iogearbox.net,
john.fastabend@gmail.com, kafai@fb.com, kpsingh@kernel.org,
linux-block@vger.kernel.org, linux-kernel@vger.kernel.org,
netdev@vger.kernel.org, songliubraving@fb.com,
syzkaller-bugs@googlegroups.com, yhs@fb.com
Subject: [syzbot] KASAN: use-after-free Read in srcu_invoke_callbacks
Date: Tue, 11 Jan 2022 03:03:17 -0800 [thread overview]
Message-ID: <00000000000081b56205d54c6667@google.com> (raw)
Hello,
syzbot found the following issue on:
HEAD commit: 3770333b3f8c Add linux-next specific files for 20220106
git tree: linux-next
console output: https://syzkaller.appspot.com/x/log.txt?x=171aa4e3b00000
kernel config: https://syzkaller.appspot.com/x/.config?x=f9eb40d9f910b474
dashboard link: https://syzkaller.appspot.com/bug?extid=4f789823c1abc5accf13
compiler: gcc (Debian 10.2.1-6) 10.2.1 20210110, GNU ld (GNU Binutils for Debian) 2.35.2
syz repro: https://syzkaller.appspot.com/x/repro.syz?x=12b08f53b00000
IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+4f789823c1abc5accf13@syzkaller.appspotmail.com
==================================================================
BUG: KASAN: use-after-free in rcu_seq_snap kernel/rcu/rcu.h:91 [inline]
BUG: KASAN: use-after-free in srcu_invoke_callbacks+0x391/0x3c0 kernel/rcu/srcutree.c:1283
Read of size 8 at addr ffff8880189b6968 by task kworker/0:1/7
CPU: 0 PID: 7 Comm: kworker/0:1 Not tainted 5.16.0-rc8-next-20220106-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Workqueue: rcu_gp srcu_invoke_callbacks
Call Trace:
<TASK>
__dump_stack lib/dump_stack.c:88 [inline]
dump_stack_lvl+0xcd/0x134 lib/dump_stack.c:106
print_address_description.constprop.0.cold+0xa5/0x3ed mm/kasan/report.c:255
__kasan_report mm/kasan/report.c:442 [inline]
kasan_report.cold+0x83/0xdf mm/kasan/report.c:459
rcu_seq_snap kernel/rcu/rcu.h:91 [inline]
srcu_invoke_callbacks+0x391/0x3c0 kernel/rcu/srcutree.c:1283
process_one_work+0x9ac/0x1650 kernel/workqueue.c:2307
worker_thread+0x657/0x1110 kernel/workqueue.c:2454
kthread+0x2e9/0x3a0 kernel/kthread.c:377
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295
</TASK>
Allocated by task 19830:
kasan_save_stack+0x1e/0x40 mm/kasan/common.c:38
kasan_set_track mm/kasan/common.c:45 [inline]
set_alloc_info mm/kasan/common.c:436 [inline]
__kasan_slab_alloc+0x90/0xc0 mm/kasan/common.c:469
kasan_slab_alloc include/linux/kasan.h:260 [inline]
slab_post_alloc_hook mm/slab.h:738 [inline]
slab_alloc_node mm/slub.c:3230 [inline]
kmem_cache_alloc_node+0x255/0x3e0 mm/slub.c:3266
blk_alloc_queue+0x5ad/0x870 block/blk-core.c:446
blk_mq_init_queue_data block/blk-mq.c:3878 [inline]
__blk_mq_alloc_disk+0x8c/0x1c0 block/blk-mq.c:3902
nbd_dev_add+0x3b2/0xcd0 drivers/block/nbd.c:1765
nbd_genl_connect+0x11f3/0x1930 drivers/block/nbd.c:1948
genl_family_rcv_msg_doit+0x228/0x320 net/netlink/genetlink.c:731
genl_family_rcv_msg net/netlink/genetlink.c:775 [inline]
genl_rcv_msg+0x328/0x580 net/netlink/genetlink.c:792
netlink_rcv_skb+0x153/0x420 net/netlink/af_netlink.c:2494
genl_rcv+0x24/0x40 net/netlink/genetlink.c:803
netlink_unicast_kernel net/netlink/af_netlink.c:1317 [inline]
netlink_unicast+0x533/0x7d0 net/netlink/af_netlink.c:1343
netlink_sendmsg+0x904/0xdf0 net/netlink/af_netlink.c:1919
sock_sendmsg_nosec net/socket.c:705 [inline]
sock_sendmsg+0xcf/0x120 net/socket.c:725
____sys_sendmsg+0x6e8/0x810 net/socket.c:2410
___sys_sendmsg+0xf3/0x170 net/socket.c:2464
__sys_sendmsg+0xe5/0x1b0 net/socket.c:2493
do_syscall_x64 arch/x86/entry/common.c:50 [inline]
do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80
entry_SYSCALL_64_after_hwframe+0x44/0xae
Freed by task 13:
kasan_save_stack+0x1e/0x40 mm/kasan/common.c:38
kasan_set_track+0x21/0x30 mm/kasan/common.c:45
kasan_set_free_info+0x20/0x30 mm/kasan/generic.c:370
____kasan_slab_free mm/kasan/common.c:366 [inline]
____kasan_slab_free+0x166/0x1a0 mm/kasan/common.c:328
kasan_slab_free include/linux/kasan.h:236 [inline]
slab_free_hook mm/slub.c:1728 [inline]
slab_free_freelist_hook+0x8b/0x1c0 mm/slub.c:1754
slab_free mm/slub.c:3509 [inline]
kmem_cache_free+0xdb/0x3b0 mm/slub.c:3526
rcu_do_batch kernel/rcu/tree.c:2536 [inline]
rcu_core+0x7b8/0x1540 kernel/rcu/tree.c:2787
__do_softirq+0x29b/0x9c2 kernel/softirq.c:558
Last potentially related work creation:
kasan_save_stack+0x1e/0x40 mm/kasan/common.c:38
__kasan_record_aux_stack+0xbe/0xd0 mm/kasan/generic.c:348
call_rcu+0x99/0x730 kernel/rcu/tree.c:3072
kobject_cleanup lib/kobject.c:705 [inline]
kobject_release lib/kobject.c:736 [inline]
kref_put include/linux/kref.h:65 [inline]
kobject_put+0x1c8/0x540 lib/kobject.c:753
disk_release+0x19a/0x260 block/genhd.c:1116
device_release+0x9f/0x240 drivers/base/core.c:2229
kobject_cleanup lib/kobject.c:705 [inline]
kobject_release lib/kobject.c:736 [inline]
kref_put include/linux/kref.h:65 [inline]
kobject_put+0x1c8/0x540 lib/kobject.c:753
put_device+0x1b/0x30 drivers/base/core.c:3512
put_disk block/genhd.c:1368 [inline]
blk_cleanup_disk+0x6b/0x80 block/genhd.c:1384
nbd_dev_remove+0x44/0xf0 drivers/block/nbd.c:253
process_one_work+0x9ac/0x1650 kernel/workqueue.c:2307
worker_thread+0x657/0x1110 kernel/workqueue.c:2454
kthread+0x2e9/0x3a0 kernel/kthread.c:377
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295
Second to last potentially related work creation:
kasan_save_stack+0x1e/0x40 mm/kasan/common.c:38
__kasan_record_aux_stack+0xbe/0xd0 mm/kasan/generic.c:348
insert_work+0x48/0x370 kernel/workqueue.c:1368
__queue_work+0x5ca/0xf30 kernel/workqueue.c:1534
__queue_delayed_work+0x1c8/0x270 kernel/workqueue.c:1682
queue_delayed_work_on+0x105/0x120 kernel/workqueue.c:1718
process_one_work+0x9ac/0x1650 kernel/workqueue.c:2307
worker_thread+0x657/0x1110 kernel/workqueue.c:2454
kthread+0x2e9/0x3a0 kernel/kthread.c:377
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295
The buggy address belongs to the object at ffff8880189b5c70
which belongs to the cache request_queue_srcu of size 3816
The buggy address is located 3320 bytes inside of
3816-byte region [ffff8880189b5c70, ffff8880189b6b58)
The buggy address belongs to the page:
page:ffffea0000626c00 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x189b0
head:ffffea0000626c00 order:3 compound_mapcount:0 compound_pincount:0
flags: 0xfff00000010200(slab|head|node=0|zone=1|lastcpupid=0x7ff)
raw: 00fff00000010200 0000000000000000 dead000000000001 ffff888012787140
raw: 0000000000000000 0000000080080008 00000001ffffffff 0000000000000000
page dumped because: kasan: bad access detected
page_owner tracks the page as allocated
page last allocated via order 3, migratetype Unmovable, gfp_mask 0x1d20c0(__GFP_IO|__GFP_FS|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP|__GFP_NOMEMALLOC|__GFP_HARDWALL), pid 14963, ts 196854875504, free_ts 196839673140
prep_new_page mm/page_alloc.c:2434 [inline]
get_page_from_freelist+0xa72/0x2f40 mm/page_alloc.c:4165
__alloc_pages+0x1b2/0x500 mm/page_alloc.c:5381
alloc_pages+0x1aa/0x310 mm/mempolicy.c:2271
alloc_slab_page mm/slub.c:1799 [inline]
allocate_slab mm/slub.c:1944 [inline]
new_slab+0x28d/0x380 mm/slub.c:2004
___slab_alloc+0x6be/0xd60 mm/slub.c:3018
__slab_alloc.constprop.0+0x4d/0xa0 mm/slub.c:3105
slab_alloc_node mm/slub.c:3196 [inline]
kmem_cache_alloc_node+0x122/0x3e0 mm/slub.c:3266
blk_alloc_queue+0x5ad/0x870 block/blk-core.c:446
blk_mq_init_queue_data block/blk-mq.c:3878 [inline]
__blk_mq_alloc_disk+0x8c/0x1c0 block/blk-mq.c:3902
nbd_dev_add+0x3b2/0xcd0 drivers/block/nbd.c:1765
nbd_genl_connect+0x11f3/0x1930 drivers/block/nbd.c:1948
genl_family_rcv_msg_doit+0x228/0x320 net/netlink/genetlink.c:731
genl_family_rcv_msg net/netlink/genetlink.c:775 [inline]
genl_rcv_msg+0x328/0x580 net/netlink/genetlink.c:792
netlink_rcv_skb+0x153/0x420 net/netlink/af_netlink.c:2494
genl_rcv+0x24/0x40 net/netlink/genetlink.c:803
netlink_unicast_kernel net/netlink/af_netlink.c:1317 [inline]
netlink_unicast+0x533/0x7d0 net/netlink/af_netlink.c:1343
page last free stack trace:
reset_page_owner include/linux/page_owner.h:24 [inline]
free_pages_prepare mm/page_alloc.c:1352 [inline]
free_pcp_prepare+0x414/0xb60 mm/page_alloc.c:1404
free_unref_page_prepare mm/page_alloc.c:3325 [inline]
free_unref_page+0x19/0x690 mm/page_alloc.c:3404
__unfreeze_partials+0x17c/0x1a0 mm/slub.c:2536
qlink_free mm/kasan/quarantine.c:157 [inline]
qlist_free_all+0x6a/0x170 mm/kasan/quarantine.c:176
kasan_quarantine_reduce+0x180/0x200 mm/kasan/quarantine.c:283
__kasan_slab_alloc+0xa2/0xc0 mm/kasan/common.c:446
kasan_slab_alloc include/linux/kasan.h:260 [inline]
slab_post_alloc_hook mm/slab.h:738 [inline]
slab_alloc_node mm/slub.c:3230 [inline]
slab_alloc mm/slub.c:3238 [inline]
__kmalloc+0x1e7/0x340 mm/slub.c:4420
kmalloc include/linux/slab.h:586 [inline]
tomoyo_realpath_from_path+0xc3/0x620 security/tomoyo/realpath.c:254
tomoyo_get_realpath security/tomoyo/file.c:151 [inline]
tomoyo_path_perm+0x21b/0x400 security/tomoyo/file.c:822
security_inode_getattr+0xcf/0x140 security/security.c:1326
vfs_getattr fs/stat.c:157 [inline]
vfs_statx+0x164/0x390 fs/stat.c:225
vfs_fstatat fs/stat.c:243 [inline]
__do_sys_newfstatat+0x96/0x120 fs/stat.c:412
do_syscall_x64 arch/x86/entry/common.c:50 [inline]
do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80
entry_SYSCALL_64_after_hwframe+0x44/0xae
Memory state around the buggy address:
ffff8880189b6800: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
ffff8880189b6880: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
>ffff8880189b6900: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
^
ffff8880189b6980: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
ffff8880189b6a00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
==================================================================
---
This report 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 issue. See:
https://goo.gl/tpsmEJ#status for how to communicate with syzbot.
syzbot can test patches for this issue, for details see:
https://goo.gl/tpsmEJ#testing-patches
next reply other threads:[~2022-01-11 11:03 UTC|newest]
Thread overview: 13+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-01-11 11:03 syzbot [this message]
[not found] ` <20220111134324.1727-1-hdanton@sina.com>
2022-01-11 19:05 ` [syzbot] KASAN: use-after-free Read in srcu_invoke_callbacks Paul E. McKenney
2022-01-14 14:38 ` Boqun Feng
2022-01-14 15:27 ` Paul E. McKenney
2022-01-14 15:58 ` Ming Lei
2022-01-14 16:11 ` Paul E. McKenney
2022-01-14 16:15 ` Ming Lei
2022-01-14 15:54 ` Ming Lei
[not found] ` <20220112094352.1785-1-hdanton@sina.com>
2022-01-12 17:12 ` Paul E. McKenney
2022-01-12 18:05 ` Paul E. McKenney
[not found] ` <20220113044938.1881-1-hdanton@sina.com>
2022-01-13 5:14 ` Paul E. McKenney
[not found] ` <20220113131256.1941-1-hdanton@sina.com>
2022-01-13 14:59 ` Paul E. McKenney
2022-01-13 3:19 ` Ming Lei
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=00000000000081b56205d54c6667@google.com \
--to=syzbot+4f789823c1abc5accf13@syzkaller.appspotmail.com \
--cc=andrii@kernel.org \
--cc=ast@kernel.org \
--cc=axboe@kernel.dk \
--cc=bpf@vger.kernel.org \
--cc=daniel@iogearbox.net \
--cc=john.fastabend@gmail.com \
--cc=kafai@fb.com \
--cc=kpsingh@kernel.org \
--cc=linux-block@vger.kernel.org \
--cc=linux-kernel@vger.kernel.org \
--cc=netdev@vger.kernel.org \
--cc=songliubraving@fb.com \
--cc=syzkaller-bugs@googlegroups.com \
--cc=yhs@fb.com \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.