* [syzbot] BUG: sleeping function called from invalid context in kernfs_walk_and_get_ns
@ 2022-10-12 14:14 syzbot
2022-10-12 18:30 ` Tejun Heo
0 siblings, 1 reply; 4+ messages in thread
From: syzbot @ 2022-10-12 14:14 UTC (permalink / raw)
To: gregkh, linux-kernel, syzkaller-bugs, tj
Hello,
syzbot found the following issue on:
HEAD commit: 282342f2dc97 Add linux-next specific files for 20220830
git tree: linux-next
console+strace: https://syzkaller.appspot.com/x/log.txt?x=14b47c63080000
kernel config: https://syzkaller.appspot.com/x/.config?x=c7b70bd555c649f4
dashboard link: https://syzkaller.appspot.com/bug?extid=9baaae5fc5795e2e6acf
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=12acb375080000
C reproducer: https://syzkaller.appspot.com/x/repro.c?x=1718658b080000
IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+9baaae5fc5795e2e6acf@syzkaller.appspotmail.com
BUG: sleeping function called from invalid context at kernel/locking/rwsem.c:1498
in_atomic(): 1, irqs_disabled(): 1, non_block: 0, pid: 3603, name: syz-executor323
preempt_count: 1, expected: 0
RCU nest depth: 0, expected: 0
INFO: lockdep is turned off.
irq event stamp: 0
hardirqs last enabled at (0): [<0000000000000000>] 0x0
hardirqs last disabled at (0): [<ffffffff814710e0>] copy_process+0x20f0/0x7120 kernel/fork.c:2199
softirqs last enabled at (0): [<ffffffff81471128>] copy_process+0x2138/0x7120 kernel/fork.c:2203
softirqs last disabled at (0): [<0000000000000000>] 0x0
Preemption disabled at:
[<0000000000000000>] 0x0
CPU: 1 PID: 3603 Comm: syz-executor323 Not tainted 6.0.0-rc3-next-20220830-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/22/2022
Call Trace:
<TASK>
__dump_stack lib/dump_stack.c:88 [inline]
dump_stack_lvl+0xcd/0x134 lib/dump_stack.c:106
__might_resched.cold+0x222/0x26b kernel/sched/core.c:9896
down_read+0x71/0x450 kernel/locking/rwsem.c:1498
kernfs_walk_and_get_ns+0xcc/0x3a0 fs/kernfs/dir.c:897
kernfs_walk_and_get include/linux/kernfs.h:600 [inline]
cgroup_get_from_path+0x61/0x610 kernel/cgroup/cgroup.c:6647
cgroup_mt_check_v1+0x19a/0x2f0 net/netfilter/xt_cgroup.c:56
xt_check_match+0x275/0x9f0 net/netfilter/x_tables.c:523
check_match net/ipv6/netfilter/ip6_tables.c:490 [inline]
find_check_match net/ipv6/netfilter/ip6_tables.c:507 [inline]
find_check_entry.constprop.0+0x342/0x9e0 net/ipv6/netfilter/ip6_tables.c:558
translate_table+0xc8b/0x1750 net/ipv6/netfilter/ip6_tables.c:735
do_replace net/ipv6/netfilter/ip6_tables.c:1153 [inline]
do_ip6t_set_ctl+0x56e/0xb90 net/ipv6/netfilter/ip6_tables.c:1639
nf_setsockopt+0x83/0xe0 net/netfilter/nf_sockopt.c:101
ipv6_setsockopt+0x127/0x190 net/ipv6/ipv6_sockglue.c:1026
udpv6_setsockopt+0x76/0xc0 net/ipv6/udp.c:1652
__sys_setsockopt+0x2d6/0x690 net/socket.c:2252
__do_sys_setsockopt net/socket.c:2263 [inline]
__se_sys_setsockopt net/socket.c:2260 [inline]
__x64_sys_setsockopt+0xba/0x150 net/socket.c:2260
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+0x63/0xcd
RIP: 0033:0x7fbfdc6eeb09
Code: 28 c3 e8 2a 14 00 00 66 2e 0f 1f 84 00 00 00 00 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 c0 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007fffed2b8f58 EFLAGS: 00000246 ORIG_RAX: 0000000000000036
RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007fbfdc6eeb09
RDX: 0000000000000040 RSI: 0000000000000029 RDI: 0000000000000003
RBP: 00007fbfdc6b2cb0 R08: 0000000000000001 R09: 0000000000000000
R10: 0000000020000300 R11: 0000000000000246 R12: 00007fbfdc6b2d40
R13: 000000
---
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
^ permalink raw reply [flat|nested] 4+ messages in thread
* Re: [syzbot] BUG: sleeping function called from invalid context in kernfs_walk_and_get_ns
2022-10-12 14:14 [syzbot] BUG: sleeping function called from invalid context in kernfs_walk_and_get_ns syzbot
@ 2022-10-12 18:30 ` Tejun Heo
2022-10-13 7:38 ` Dmitry Vyukov
0 siblings, 1 reply; 4+ messages in thread
From: Tejun Heo @ 2022-10-12 18:30 UTC (permalink / raw)
To: syzbot; +Cc: gregkh, linux-kernel, syzkaller-bugs
On Wed, Oct 12, 2022 at 07:14:35AM -0700, syzbot wrote:
> Hello,
>
> syzbot found the following issue on:
>
> HEAD commit: 282342f2dc97 Add linux-next specific files for 20220830
> git tree: linux-next
> console+strace: https://syzkaller.appspot.com/x/log.txt?x=14b47c63080000
> kernel config: https://syzkaller.appspot.com/x/.config?x=c7b70bd555c649f4
> dashboard link: https://syzkaller.appspot.com/bug?extid=9baaae5fc5795e2e6acf
> 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=12acb375080000
> C reproducer: https://syzkaller.appspot.com/x/repro.c?x=1718658b080000
>
> IMPORTANT: if you fix the issue, please add the following tag to the commit:
> Reported-by: syzbot+9baaae5fc5795e2e6acf@syzkaller.appspotmail.com
>
> BUG: sleeping function called from invalid context at kernel/locking/rwsem.c:1498
> in_atomic(): 1, irqs_disabled(): 1, non_block: 0, pid: 3603, name: syz-executor323
> preempt_count: 1, expected: 0
> RCU nest depth: 0, expected: 0
> INFO: lockdep is turned off.
> irq event stamp: 0
> hardirqs last enabled at (0): [<0000000000000000>] 0x0
> hardirqs last disabled at (0): [<ffffffff814710e0>] copy_process+0x20f0/0x7120 kernel/fork.c:2199
> softirqs last enabled at (0): [<ffffffff81471128>] copy_process+0x2138/0x7120 kernel/fork.c:2203
> softirqs last disabled at (0): [<0000000000000000>] 0x0
> Preemption disabled at:
> [<0000000000000000>] 0x0
> CPU: 1 PID: 3603 Comm: syz-executor323 Not tainted 6.0.0-rc3-next-20220830-syzkaller #0
> Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/22/2022
> Call Trace:
> <TASK>
> __dump_stack lib/dump_stack.c:88 [inline]
> dump_stack_lvl+0xcd/0x134 lib/dump_stack.c:106
> __might_resched.cold+0x222/0x26b kernel/sched/core.c:9896
> down_read+0x71/0x450 kernel/locking/rwsem.c:1498
> kernfs_walk_and_get_ns+0xcc/0x3a0 fs/kernfs/dir.c:897
> kernfs_walk_and_get include/linux/kernfs.h:600 [inline]
> cgroup_get_from_path+0x61/0x610 kernel/cgroup/cgroup.c:6647
The fix for this one is already queued in cgroup/for-6.1-fixes. Will send
that to linus once rc1 drops.
Thanks.
--
tejun
^ permalink raw reply [flat|nested] 4+ messages in thread
* Re: [syzbot] BUG: sleeping function called from invalid context in kernfs_walk_and_get_ns
2022-10-12 18:30 ` Tejun Heo
@ 2022-10-13 7:38 ` Dmitry Vyukov
2022-10-13 17:39 ` Tejun Heo
0 siblings, 1 reply; 4+ messages in thread
From: Dmitry Vyukov @ 2022-10-13 7:38 UTC (permalink / raw)
To: Tejun Heo; +Cc: syzbot, gregkh, linux-kernel, syzkaller-bugs
On Wed, 12 Oct 2022 at 20:30, Tejun Heo <tj@kernel.org> wrote:
>
> On Wed, Oct 12, 2022 at 07:14:35AM -0700, syzbot wrote:
> > Hello,
> >
> > syzbot found the following issue on:
> >
> > HEAD commit: 282342f2dc97 Add linux-next specific files for 20220830
> > git tree: linux-next
> > console+strace: https://syzkaller.appspot.com/x/log.txt?x=14b47c63080000
> > kernel config: https://syzkaller.appspot.com/x/.config?x=c7b70bd555c649f4
> > dashboard link: https://syzkaller.appspot.com/bug?extid=9baaae5fc5795e2e6acf
> > 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=12acb375080000
> > C reproducer: https://syzkaller.appspot.com/x/repro.c?x=1718658b080000
> >
> > IMPORTANT: if you fix the issue, please add the following tag to the commit:
> > Reported-by: syzbot+9baaae5fc5795e2e6acf@syzkaller.appspotmail.com
> >
> > BUG: sleeping function called from invalid context at kernel/locking/rwsem.c:1498
> > in_atomic(): 1, irqs_disabled(): 1, non_block: 0, pid: 3603, name: syz-executor323
> > preempt_count: 1, expected: 0
> > RCU nest depth: 0, expected: 0
> > INFO: lockdep is turned off.
> > irq event stamp: 0
> > hardirqs last enabled at (0): [<0000000000000000>] 0x0
> > hardirqs last disabled at (0): [<ffffffff814710e0>] copy_process+0x20f0/0x7120 kernel/fork.c:2199
> > softirqs last enabled at (0): [<ffffffff81471128>] copy_process+0x2138/0x7120 kernel/fork.c:2203
> > softirqs last disabled at (0): [<0000000000000000>] 0x0
> > Preemption disabled at:
> > [<0000000000000000>] 0x0
> > CPU: 1 PID: 3603 Comm: syz-executor323 Not tainted 6.0.0-rc3-next-20220830-syzkaller #0
> > Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/22/2022
> > Call Trace:
> > <TASK>
> > __dump_stack lib/dump_stack.c:88 [inline]
> > dump_stack_lvl+0xcd/0x134 lib/dump_stack.c:106
> > __might_resched.cold+0x222/0x26b kernel/sched/core.c:9896
> > down_read+0x71/0x450 kernel/locking/rwsem.c:1498
> > kernfs_walk_and_get_ns+0xcc/0x3a0 fs/kernfs/dir.c:897
> > kernfs_walk_and_get include/linux/kernfs.h:600 [inline]
> > cgroup_get_from_path+0x61/0x610 kernel/cgroup/cgroup.c:6647
>
> The fix for this one is already queued in cgroup/for-6.1-fixes. Will send
> that to linus once rc1 drops.
Hi Tejun,
What is the fix?
syzbot needs it to close the bug and report similarly looking issues in future.
^ permalink raw reply [flat|nested] 4+ messages in thread
* Re: [syzbot] BUG: sleeping function called from invalid context in kernfs_walk_and_get_ns
2022-10-13 7:38 ` Dmitry Vyukov
@ 2022-10-13 17:39 ` Tejun Heo
0 siblings, 0 replies; 4+ messages in thread
From: Tejun Heo @ 2022-10-13 17:39 UTC (permalink / raw)
To: Dmitry Vyukov; +Cc: syzbot, gregkh, linux-kernel, syzkaller-bugs
On Thu, Oct 13, 2022 at 09:38:37AM +0200, Dmitry Vyukov wrote:
> What is the fix?
> syzbot needs it to close the bug and report similarly looking issues in future.
46307fd6e27a ("cgroup: Reorganize css_set_lock and kernfs path processing")
Thanks.
--
tejun
^ permalink raw reply [flat|nested] 4+ messages in thread
end of thread, other threads:[~2022-10-13 17:39 UTC | newest]
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2022-10-12 14:14 [syzbot] BUG: sleeping function called from invalid context in kernfs_walk_and_get_ns syzbot
2022-10-12 18:30 ` Tejun Heo
2022-10-13 7:38 ` Dmitry Vyukov
2022-10-13 17:39 ` Tejun Heo
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