* [syzbot] WARNING in signalfd_cleanup
@ 2022-01-05 15:37 syzbot
2022-01-05 15:42 ` Eric Dumazet
0 siblings, 1 reply; 6+ messages in thread
From: syzbot @ 2022-01-05 15:37 UTC (permalink / raw)
To: changbin.du, daniel, davem, edumazet, hkallweit1, kuba,
linux-fsdevel, linux-kernel, netdev, syzkaller-bugs, viro,
yajun.deng
Hello,
syzbot found the following issue on:
HEAD commit: 6b8d4927540e Add linux-next specific files for 20220104
git tree: linux-next
console output: https://syzkaller.appspot.com/x/log.txt?x=159d88e3b00000
kernel config: https://syzkaller.appspot.com/x/.config?x=45c9bbbf2ae8e3d3
dashboard link: https://syzkaller.appspot.com/bug?extid=5426c7ed6868c705ca14
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=117be65db00000
C reproducer: https://syzkaller.appspot.com/x/repro.c?x=15a75c8db00000
The issue was bisected to:
commit e4b8954074f6d0db01c8c97d338a67f9389c042f
Author: Eric Dumazet <edumazet@google.com>
Date: Tue Dec 7 01:30:37 2021 +0000
netlink: add net device refcount tracker to struct ethnl_req_info
bisection log: https://syzkaller.appspot.com/x/bisect.txt?x=12bca4e3b00000
final oops: https://syzkaller.appspot.com/x/report.txt?x=11bca4e3b00000
console output: https://syzkaller.appspot.com/x/log.txt?x=16bca4e3b00000
IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+5426c7ed6868c705ca14@syzkaller.appspotmail.com
Fixes: e4b8954074f6 ("netlink: add net device refcount tracker to struct ethnl_req_info")
------------[ cut here ]------------
WARNING: CPU: 0 PID: 3604 at kernel/sched/wait.c:245 __wake_up_pollfree+0x40/0x50 kernel/sched/wait.c:246
Modules linked in:
CPU: 0 PID: 3604 Comm: syz-executor714 Not tainted 5.16.0-rc8-next-20220104-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
RIP: 0010:__wake_up_pollfree+0x40/0x50 kernel/sched/wait.c:245
Code: f3 ff ff 48 8d 6b 40 48 b8 00 00 00 00 00 fc ff df 48 89 ea 48 c1 ea 03 80 3c 02 00 75 11 48 8b 43 40 48 39 c5 75 03 5b 5d c3 <0f> 0b 5b 5d c3 48 89 ef e8 13 d8 69 00 eb e5 cc 48 c1 e7 06 48 63
RSP: 0018:ffffc90001aaf9f8 EFLAGS: 00010083
RAX: ffff88801cd623f0 RBX: ffff88801bec8048 RCX: 0000000000000000
RDX: 1ffff110037d9011 RSI: 0000000000000004 RDI: 0000000000000001
RBP: ffff88801bec8088 R08: 0000000000000000 R09: ffff88801bec804b
R10: ffffed10037d9009 R11: 0000000000000000 R12: ffff88801bec8040
R13: ffff88801e029d40 R14: dffffc0000000000 R15: ffff88807eb50000
FS: 00005555573ad300(0000) GS:ffff8880b9c00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00000000200000c0 CR3: 000000001e5e4000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
<TASK>
wake_up_pollfree include/linux/wait.h:271 [inline]
signalfd_cleanup+0x42/0x60 fs/signalfd.c:38
__cleanup_sighand kernel/fork.c:1596 [inline]
__cleanup_sighand+0x72/0xb0 kernel/fork.c:1593
__exit_signal kernel/exit.c:159 [inline]
release_task+0xc02/0x17e0 kernel/exit.c:200
wait_task_zombie kernel/exit.c:1117 [inline]
wait_consider_task+0x2fa6/0x3b80 kernel/exit.c:1344
do_wait_thread kernel/exit.c:1407 [inline]
do_wait+0x6ca/0xce0 kernel/exit.c:1524
kernel_wait4+0x14c/0x260 kernel/exit.c:1687
__do_sys_wait4+0x13f/0x150 kernel/exit.c:1715
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
RIP: 0033:0x7facd6682386
Code: 0f 1f 40 00 31 c9 e9 09 00 00 00 66 0f 1f 84 00 00 00 00 00 49 89 ca 64 8b 04 25 18 00 00 00 85 c0 75 11 b8 3d 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 5a c3 90 48 83 ec 28 89 54 24 14 48 89 74 24
RSP: 002b:00007ffdb91adef8 EFLAGS: 00000246 ORIG_RAX: 000000000000003d
RAX: ffffffffffffffda RBX: 000000000000c646 RCX: 00007facd6682386
RDX: 0000000040000001 RSI: 00007ffdb91adf14 RDI: 00000000ffffffff
RBP: 0000000000000f17 R08: 0000000000000032 R09: 00007ffdb91ec080
R10: 0000000000000000 R11: 0000000000000246 R12: 431bde82d7b634db
R13: 00007ffdb91adf14 R14: 0000000000000000 R15: 0000000000000000
</TASK>
---
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.
For information about bisection process see: https://goo.gl/tpsmEJ#bisection
syzbot can test patches for this issue, for details see:
https://goo.gl/tpsmEJ#testing-patches
^ permalink raw reply [flat|nested] 6+ messages in thread* Re: [syzbot] WARNING in signalfd_cleanup 2022-01-05 15:37 [syzbot] WARNING in signalfd_cleanup syzbot @ 2022-01-05 15:42 ` Eric Dumazet 2022-01-05 15:52 ` Eric Biggers 0 siblings, 1 reply; 6+ messages in thread From: Eric Dumazet @ 2022-01-05 15:42 UTC (permalink / raw) To: syzbot Cc: changbin.du, Daniel Borkmann, David Miller, Heiner Kallweit, Jakub Kicinski, linux-fsdevel, LKML, netdev, syzkaller-bugs, Al Viro, Yajun Deng On Wed, Jan 5, 2022 at 7:37 AM syzbot <syzbot+5426c7ed6868c705ca14@syzkaller.appspotmail.com> wrote: > > Hello, > > syzbot found the following issue on: > > HEAD commit: 6b8d4927540e Add linux-next specific files for 20220104 > git tree: linux-next > console output: https://syzkaller.appspot.com/x/log.txt?x=159d88e3b00000 > kernel config: https://syzkaller.appspot.com/x/.config?x=45c9bbbf2ae8e3d3 > dashboard link: https://syzkaller.appspot.com/bug?extid=5426c7ed6868c705ca14 > 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=117be65db00000 > C reproducer: https://syzkaller.appspot.com/x/repro.c?x=15a75c8db00000 > C repro looks legit, point to an io_uring issue. > The issue was bisected to: Please ignore the bisection. > > commit e4b8954074f6d0db01c8c97d338a67f9389c042f > Author: Eric Dumazet <edumazet@google.com> > Date: Tue Dec 7 01:30:37 2021 +0000 > > netlink: add net device refcount tracker to struct ethnl_req_info > > bisection log: https://syzkaller.appspot.com/x/bisect.txt?x=12bca4e3b00000 > final oops: https://syzkaller.appspot.com/x/report.txt?x=11bca4e3b00000 > console output: https://syzkaller.appspot.com/x/log.txt?x=16bca4e3b00000 > > IMPORTANT: if you fix the issue, please add the following tag to the commit: > Reported-by: syzbot+5426c7ed6868c705ca14@syzkaller.appspotmail.com > Fixes: e4b8954074f6 ("netlink: add net device refcount tracker to struct ethnl_req_info") > > ------------[ cut here ]------------ > WARNING: CPU: 0 PID: 3604 at kernel/sched/wait.c:245 __wake_up_pollfree+0x40/0x50 kernel/sched/wait.c:246 > Modules linked in: > CPU: 0 PID: 3604 Comm: syz-executor714 Not tainted 5.16.0-rc8-next-20220104-syzkaller #0 > Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 > RIP: 0010:__wake_up_pollfree+0x40/0x50 kernel/sched/wait.c:245 > Code: f3 ff ff 48 8d 6b 40 48 b8 00 00 00 00 00 fc ff df 48 89 ea 48 c1 ea 03 80 3c 02 00 75 11 48 8b 43 40 48 39 c5 75 03 5b 5d c3 <0f> 0b 5b 5d c3 48 89 ef e8 13 d8 69 00 eb e5 cc 48 c1 e7 06 48 63 > RSP: 0018:ffffc90001aaf9f8 EFLAGS: 00010083 > RAX: ffff88801cd623f0 RBX: ffff88801bec8048 RCX: 0000000000000000 > RDX: 1ffff110037d9011 RSI: 0000000000000004 RDI: 0000000000000001 > RBP: ffff88801bec8088 R08: 0000000000000000 R09: ffff88801bec804b > R10: ffffed10037d9009 R11: 0000000000000000 R12: ffff88801bec8040 > R13: ffff88801e029d40 R14: dffffc0000000000 R15: ffff88807eb50000 > FS: 00005555573ad300(0000) GS:ffff8880b9c00000(0000) knlGS:0000000000000000 > CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 > CR2: 00000000200000c0 CR3: 000000001e5e4000 CR4: 00000000003506f0 > DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 > DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 > Call Trace: > <TASK> > wake_up_pollfree include/linux/wait.h:271 [inline] > signalfd_cleanup+0x42/0x60 fs/signalfd.c:38 > __cleanup_sighand kernel/fork.c:1596 [inline] > __cleanup_sighand+0x72/0xb0 kernel/fork.c:1593 > __exit_signal kernel/exit.c:159 [inline] > release_task+0xc02/0x17e0 kernel/exit.c:200 > wait_task_zombie kernel/exit.c:1117 [inline] > wait_consider_task+0x2fa6/0x3b80 kernel/exit.c:1344 > do_wait_thread kernel/exit.c:1407 [inline] > do_wait+0x6ca/0xce0 kernel/exit.c:1524 > kernel_wait4+0x14c/0x260 kernel/exit.c:1687 > __do_sys_wait4+0x13f/0x150 kernel/exit.c:1715 > 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 > RIP: 0033:0x7facd6682386 > Code: 0f 1f 40 00 31 c9 e9 09 00 00 00 66 0f 1f 84 00 00 00 00 00 49 89 ca 64 8b 04 25 18 00 00 00 85 c0 75 11 b8 3d 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 5a c3 90 48 83 ec 28 89 54 24 14 48 89 74 24 > RSP: 002b:00007ffdb91adef8 EFLAGS: 00000246 ORIG_RAX: 000000000000003d > RAX: ffffffffffffffda RBX: 000000000000c646 RCX: 00007facd6682386 > RDX: 0000000040000001 RSI: 00007ffdb91adf14 RDI: 00000000ffffffff > RBP: 0000000000000f17 R08: 0000000000000032 R09: 00007ffdb91ec080 > R10: 0000000000000000 R11: 0000000000000246 R12: 431bde82d7b634db > R13: 00007ffdb91adf14 R14: 0000000000000000 R15: 0000000000000000 > </TASK> > > > --- > 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. > For information about bisection process see: https://goo.gl/tpsmEJ#bisection > syzbot can test patches for this issue, for details see: > https://goo.gl/tpsmEJ#testing-patches ^ permalink raw reply [flat|nested] 6+ messages in thread
* Re: [syzbot] WARNING in signalfd_cleanup 2022-01-05 15:42 ` Eric Dumazet @ 2022-01-05 15:52 ` Eric Biggers 2022-01-05 17:37 ` Pavel Begunkov 0 siblings, 1 reply; 6+ messages in thread From: Eric Biggers @ 2022-01-05 15:52 UTC (permalink / raw) To: Jens Axboe, Pavel Begunkov, io-uring Cc: Eric Dumazet, syzbot, changbin.du, Daniel Borkmann, David Miller, Heiner Kallweit, Jakub Kicinski, linux-fsdevel, LKML, netdev, syzkaller-bugs, Al Viro, Yajun Deng [+io_uring list and maintainers] This appears to be the known bug in io_uring where it doesn't POLLFREE notifications. See previous discussion: https://lore.kernel.org/all/4a472e72-d527-db79-d46e-efa9d4cad5bb@kernel.dk/ On Wed, Jan 05, 2022 at 07:42:10AM -0800, 'Eric Dumazet' via syzkaller-bugs wrote: > On Wed, Jan 5, 2022 at 7:37 AM syzbot > <syzbot+5426c7ed6868c705ca14@syzkaller.appspotmail.com> wrote: > > > > Hello, > > > > syzbot found the following issue on: > > > > HEAD commit: 6b8d4927540e Add linux-next specific files for 20220104 > > git tree: linux-next > > console output: https://syzkaller.appspot.com/x/log.txt?x=159d88e3b00000 > > kernel config: https://syzkaller.appspot.com/x/.config?x=45c9bbbf2ae8e3d3 > > dashboard link: https://syzkaller.appspot.com/bug?extid=5426c7ed6868c705ca14 > > 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=117be65db00000 > > C reproducer: https://syzkaller.appspot.com/x/repro.c?x=15a75c8db00000 > > > > C repro looks legit, point to an io_uring issue. > > > The issue was bisected to: > > Please ignore the bisection. > > > > > commit e4b8954074f6d0db01c8c97d338a67f9389c042f > > Author: Eric Dumazet <edumazet@google.com> > > Date: Tue Dec 7 01:30:37 2021 +0000 > > > > netlink: add net device refcount tracker to struct ethnl_req_info > > > > bisection log: https://syzkaller.appspot.com/x/bisect.txt?x=12bca4e3b00000 > > final oops: https://syzkaller.appspot.com/x/report.txt?x=11bca4e3b00000 > > console output: https://syzkaller.appspot.com/x/log.txt?x=16bca4e3b00000 > > > > IMPORTANT: if you fix the issue, please add the following tag to the commit: > > Reported-by: syzbot+5426c7ed6868c705ca14@syzkaller.appspotmail.com > > Fixes: e4b8954074f6 ("netlink: add net device refcount tracker to struct ethnl_req_info") > > > > ------------[ cut here ]------------ > > WARNING: CPU: 0 PID: 3604 at kernel/sched/wait.c:245 __wake_up_pollfree+0x40/0x50 kernel/sched/wait.c:246 > > Modules linked in: > > CPU: 0 PID: 3604 Comm: syz-executor714 Not tainted 5.16.0-rc8-next-20220104-syzkaller #0 > > Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 > > RIP: 0010:__wake_up_pollfree+0x40/0x50 kernel/sched/wait.c:245 > > Code: f3 ff ff 48 8d 6b 40 48 b8 00 00 00 00 00 fc ff df 48 89 ea 48 c1 ea 03 80 3c 02 00 75 11 48 8b 43 40 48 39 c5 75 03 5b 5d c3 <0f> 0b 5b 5d c3 48 89 ef e8 13 d8 69 00 eb e5 cc 48 c1 e7 06 48 63 > > RSP: 0018:ffffc90001aaf9f8 EFLAGS: 00010083 > > RAX: ffff88801cd623f0 RBX: ffff88801bec8048 RCX: 0000000000000000 > > RDX: 1ffff110037d9011 RSI: 0000000000000004 RDI: 0000000000000001 > > RBP: ffff88801bec8088 R08: 0000000000000000 R09: ffff88801bec804b > > R10: ffffed10037d9009 R11: 0000000000000000 R12: ffff88801bec8040 > > R13: ffff88801e029d40 R14: dffffc0000000000 R15: ffff88807eb50000 > > FS: 00005555573ad300(0000) GS:ffff8880b9c00000(0000) knlGS:0000000000000000 > > CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 > > CR2: 00000000200000c0 CR3: 000000001e5e4000 CR4: 00000000003506f0 > > DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 > > DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 > > Call Trace: > > <TASK> > > wake_up_pollfree include/linux/wait.h:271 [inline] > > signalfd_cleanup+0x42/0x60 fs/signalfd.c:38 > > __cleanup_sighand kernel/fork.c:1596 [inline] > > __cleanup_sighand+0x72/0xb0 kernel/fork.c:1593 > > __exit_signal kernel/exit.c:159 [inline] > > release_task+0xc02/0x17e0 kernel/exit.c:200 > > wait_task_zombie kernel/exit.c:1117 [inline] > > wait_consider_task+0x2fa6/0x3b80 kernel/exit.c:1344 > > do_wait_thread kernel/exit.c:1407 [inline] > > do_wait+0x6ca/0xce0 kernel/exit.c:1524 > > kernel_wait4+0x14c/0x260 kernel/exit.c:1687 > > __do_sys_wait4+0x13f/0x150 kernel/exit.c:1715 > > 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 > > RIP: 0033:0x7facd6682386 > > Code: 0f 1f 40 00 31 c9 e9 09 00 00 00 66 0f 1f 84 00 00 00 00 00 49 89 ca 64 8b 04 25 18 00 00 00 85 c0 75 11 b8 3d 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 5a c3 90 48 83 ec 28 89 54 24 14 48 89 74 24 > > RSP: 002b:00007ffdb91adef8 EFLAGS: 00000246 ORIG_RAX: 000000000000003d > > RAX: ffffffffffffffda RBX: 000000000000c646 RCX: 00007facd6682386 > > RDX: 0000000040000001 RSI: 00007ffdb91adf14 RDI: 00000000ffffffff > > RBP: 0000000000000f17 R08: 0000000000000032 R09: 00007ffdb91ec080 > > R10: 0000000000000000 R11: 0000000000000246 R12: 431bde82d7b634db > > R13: 00007ffdb91adf14 R14: 0000000000000000 R15: 0000000000000000 > > </TASK> > > > > > > --- > > 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. > > For information about bisection process see: https://goo.gl/tpsmEJ#bisection > > syzbot can test patches for this issue, for details see: > > https://goo.gl/tpsmEJ#testing-patches > > -- > You received this message because you are subscribed to the Google Groups "syzkaller-bugs" group. > To unsubscribe from this group and stop receiving emails from it, send an email to syzkaller-bugs+unsubscribe@googlegroups.com. > To view this discussion on the web visit https://groups.google.com/d/msgid/syzkaller-bugs/CANn89iK3tP3rANSWM7_%3DimMeMcUknT0U2GyfA9W4v12ad6_PkQ%40mail.gmail.com. ^ permalink raw reply [flat|nested] 6+ messages in thread
* Re: [syzbot] WARNING in signalfd_cleanup 2022-01-05 15:52 ` Eric Biggers @ 2022-01-05 17:37 ` Pavel Begunkov 2022-01-14 1:55 ` Pavel Begunkov 0 siblings, 1 reply; 6+ messages in thread From: Pavel Begunkov @ 2022-01-05 17:37 UTC (permalink / raw) To: Eric Biggers, Jens Axboe, io-uring Cc: Eric Dumazet, syzbot, changbin.du, Daniel Borkmann, David Miller, Heiner Kallweit, Jakub Kicinski, linux-fsdevel, LKML, netdev, syzkaller-bugs, Al Viro, Yajun Deng On 1/5/22 15:52, Eric Biggers wrote: > [+io_uring list and maintainers] > > This appears to be the known bug in io_uring where it doesn't POLLFREE > notifications. See previous discussion: > https://lore.kernel.org/all/4a472e72-d527-db79-d46e-efa9d4cad5bb@kernel.dk/ We've got some fixing and groundwork done, but not POLLFREE yet. Great to have a repro, thanks > On Wed, Jan 05, 2022 at 07:42:10AM -0800, 'Eric Dumazet' via syzkaller-bugs wrote: >> On Wed, Jan 5, 2022 at 7:37 AM syzbot >> <syzbot+5426c7ed6868c705ca14@syzkaller.appspotmail.com> wrote: >>> >>> Hello, >>> >>> syzbot found the following issue on: >>> >>> HEAD commit: 6b8d4927540e Add linux-next specific files for 20220104 >>> git tree: linux-next >>> console output: https://syzkaller.appspot.com/x/log.txt?x=159d88e3b00000 >>> kernel config: https://syzkaller.appspot.com/x/.config?x=45c9bbbf2ae8e3d3 >>> dashboard link: https://syzkaller.appspot.com/bug?extid=5426c7ed6868c705ca14 >>> 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=117be65db00000 >>> C reproducer: https://syzkaller.appspot.com/x/repro.c?x=15a75c8db00000 >>> >> >> C repro looks legit, point to an io_uring issue. >> >>> The issue was bisected to: >> >> Please ignore the bisection. >> >>> >>> commit e4b8954074f6d0db01c8c97d338a67f9389c042f >>> Author: Eric Dumazet <edumazet@google.com> >>> Date: Tue Dec 7 01:30:37 2021 +0000 >>> >>> netlink: add net device refcount tracker to struct ethnl_req_info >>> >>> bisection log: https://syzkaller.appspot.com/x/bisect.txt?x=12bca4e3b00000 >>> final oops: https://syzkaller.appspot.com/x/report.txt?x=11bca4e3b00000 >>> console output: https://syzkaller.appspot.com/x/log.txt?x=16bca4e3b00000 >>> >>> IMPORTANT: if you fix the issue, please add the following tag to the commit: >>> Reported-by: syzbot+5426c7ed6868c705ca14@syzkaller.appspotmail.com >>> Fixes: e4b8954074f6 ("netlink: add net device refcount tracker to struct ethnl_req_info") >>> >>> ------------[ cut here ]------------ >>> WARNING: CPU: 0 PID: 3604 at kernel/sched/wait.c:245 __wake_up_pollfree+0x40/0x50 kernel/sched/wait.c:246 >>> Modules linked in: >>> CPU: 0 PID: 3604 Comm: syz-executor714 Not tainted 5.16.0-rc8-next-20220104-syzkaller #0 >>> Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 >>> RIP: 0010:__wake_up_pollfree+0x40/0x50 kernel/sched/wait.c:245 >>> Code: f3 ff ff 48 8d 6b 40 48 b8 00 00 00 00 00 fc ff df 48 89 ea 48 c1 ea 03 80 3c 02 00 75 11 48 8b 43 40 48 39 c5 75 03 5b 5d c3 <0f> 0b 5b 5d c3 48 89 ef e8 13 d8 69 00 eb e5 cc 48 c1 e7 06 48 63 >>> RSP: 0018:ffffc90001aaf9f8 EFLAGS: 00010083 >>> RAX: ffff88801cd623f0 RBX: ffff88801bec8048 RCX: 0000000000000000 >>> RDX: 1ffff110037d9011 RSI: 0000000000000004 RDI: 0000000000000001 >>> RBP: ffff88801bec8088 R08: 0000000000000000 R09: ffff88801bec804b >>> R10: ffffed10037d9009 R11: 0000000000000000 R12: ffff88801bec8040 >>> R13: ffff88801e029d40 R14: dffffc0000000000 R15: ffff88807eb50000 >>> FS: 00005555573ad300(0000) GS:ffff8880b9c00000(0000) knlGS:0000000000000000 >>> CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 >>> CR2: 00000000200000c0 CR3: 000000001e5e4000 CR4: 00000000003506f0 >>> DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 >>> DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 >>> Call Trace: >>> <TASK> >>> wake_up_pollfree include/linux/wait.h:271 [inline] >>> signalfd_cleanup+0x42/0x60 fs/signalfd.c:38 >>> __cleanup_sighand kernel/fork.c:1596 [inline] >>> __cleanup_sighand+0x72/0xb0 kernel/fork.c:1593 >>> __exit_signal kernel/exit.c:159 [inline] >>> release_task+0xc02/0x17e0 kernel/exit.c:200 >>> wait_task_zombie kernel/exit.c:1117 [inline] >>> wait_consider_task+0x2fa6/0x3b80 kernel/exit.c:1344 >>> do_wait_thread kernel/exit.c:1407 [inline] >>> do_wait+0x6ca/0xce0 kernel/exit.c:1524 >>> kernel_wait4+0x14c/0x260 kernel/exit.c:1687 >>> __do_sys_wait4+0x13f/0x150 kernel/exit.c:1715 >>> 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 >>> RIP: 0033:0x7facd6682386 >>> Code: 0f 1f 40 00 31 c9 e9 09 00 00 00 66 0f 1f 84 00 00 00 00 00 49 89 ca 64 8b 04 25 18 00 00 00 85 c0 75 11 b8 3d 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 5a c3 90 48 83 ec 28 89 54 24 14 48 89 74 24 >>> RSP: 002b:00007ffdb91adef8 EFLAGS: 00000246 ORIG_RAX: 000000000000003d >>> RAX: ffffffffffffffda RBX: 000000000000c646 RCX: 00007facd6682386 >>> RDX: 0000000040000001 RSI: 00007ffdb91adf14 RDI: 00000000ffffffff >>> RBP: 0000000000000f17 R08: 0000000000000032 R09: 00007ffdb91ec080 >>> R10: 0000000000000000 R11: 0000000000000246 R12: 431bde82d7b634db >>> R13: 00007ffdb91adf14 R14: 0000000000000000 R15: 0000000000000000 >>> </TASK> >>> >>> >>> --- >>> 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. >>> For information about bisection process see: https://goo.gl/tpsmEJ#bisection >>> syzbot can test patches for this issue, for details see: >>> https://goo.gl/tpsmEJ#testing-patches >> >> -- >> You received this message because you are subscribed to the Google Groups "syzkaller-bugs" group. >> To unsubscribe from this group and stop receiving emails from it, send an email to syzkaller-bugs+unsubscribe@googlegroups.com. >> To view this discussion on the web visit https://groups.google.com/d/msgid/syzkaller-bugs/CANn89iK3tP3rANSWM7_%3DimMeMcUknT0U2GyfA9W4v12ad6_PkQ%40mail.gmail.com. -- Pavel Begunkov ^ permalink raw reply [flat|nested] 6+ messages in thread
* Re: [syzbot] WARNING in signalfd_cleanup 2022-01-05 17:37 ` Pavel Begunkov @ 2022-01-14 1:55 ` Pavel Begunkov 2022-01-14 2:09 ` syzbot 0 siblings, 1 reply; 6+ messages in thread From: Pavel Begunkov @ 2022-01-14 1:55 UTC (permalink / raw) To: Eric Biggers, Jens Axboe, io-uring Cc: Eric Dumazet, syzbot, changbin.du, Daniel Borkmann, David Miller, Heiner Kallweit, Jakub Kicinski, linux-fsdevel, LKML, netdev, syzkaller-bugs, Al Viro, Yajun Deng On 1/5/22 17:37, Pavel Begunkov wrote: > On 1/5/22 15:52, Eric Biggers wrote: >> [+io_uring list and maintainers] >> >> This appears to be the known bug in io_uring where it doesn't POLLFREE >> notifications. See previous discussion: >> https://lore.kernel.org/all/4a472e72-d527-db79-d46e-efa9d4cad5bb@kernel.dk/ > > We've got some fixing and groundwork done, but not POLLFREE yet. > Great to have a repro, thanks #syz test: https://github.com/isilence/linux.git pollfree_test1 Almost identical to how Eric did it for aio, let's try it out >> On Wed, Jan 05, 2022 at 07:42:10AM -0800, 'Eric Dumazet' via syzkaller-bugs wrote: >>> On Wed, Jan 5, 2022 at 7:37 AM syzbot >>> <syzbot+5426c7ed6868c705ca14@syzkaller.appspotmail.com> wrote: >>>> >>>> Hello, >>>> >>>> syzbot found the following issue on: >>>> >>>> HEAD commit: 6b8d4927540e Add linux-next specific files for 20220104 >>>> git tree: linux-next >>>> console output: https://syzkaller.appspot.com/x/log.txt?x=159d88e3b00000 >>>> kernel config: https://syzkaller.appspot.com/x/.config?x=45c9bbbf2ae8e3d3 >>>> dashboard link: https://syzkaller.appspot.com/bug?extid=5426c7ed6868c705ca14 >>>> 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=117be65db00000 >>>> C reproducer: https://syzkaller.appspot.com/x/repro.c?x=15a75c8db00000 >>>> >>> >>> C repro looks legit, point to an io_uring issue. >>> >>>> The issue was bisected to: >>> >>> Please ignore the bisection. >>> >>>> >>>> commit e4b8954074f6d0db01c8c97d338a67f9389c042f >>>> Author: Eric Dumazet <edumazet@google.com> >>>> Date: Tue Dec 7 01:30:37 2021 +0000 >>>> >>>> netlink: add net device refcount tracker to struct ethnl_req_info >>>> >>>> bisection log: https://syzkaller.appspot.com/x/bisect.txt?x=12bca4e3b00000 >>>> final oops: https://syzkaller.appspot.com/x/report.txt?x=11bca4e3b00000 >>>> console output: https://syzkaller.appspot.com/x/log.txt?x=16bca4e3b00000 >>>> >>>> IMPORTANT: if you fix the issue, please add the following tag to the commit: >>>> Reported-by: syzbot+5426c7ed6868c705ca14@syzkaller.appspotmail.com >>>> Fixes: e4b8954074f6 ("netlink: add net device refcount tracker to struct ethnl_req_info") >>>> >>>> ------------[ cut here ]------------ >>>> WARNING: CPU: 0 PID: 3604 at kernel/sched/wait.c:245 __wake_up_pollfree+0x40/0x50 kernel/sched/wait.c:246 >>>> Modules linked in: >>>> CPU: 0 PID: 3604 Comm: syz-executor714 Not tainted 5.16.0-rc8-next-20220104-syzkaller #0 >>>> Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 >>>> RIP: 0010:__wake_up_pollfree+0x40/0x50 kernel/sched/wait.c:245 >>>> Code: f3 ff ff 48 8d 6b 40 48 b8 00 00 00 00 00 fc ff df 48 89 ea 48 c1 ea 03 80 3c 02 00 75 11 48 8b 43 40 48 39 c5 75 03 5b 5d c3 <0f> 0b 5b 5d c3 48 89 ef e8 13 d8 69 00 eb e5 cc 48 c1 e7 06 48 63 >>>> RSP: 0018:ffffc90001aaf9f8 EFLAGS: 00010083 >>>> RAX: ffff88801cd623f0 RBX: ffff88801bec8048 RCX: 0000000000000000 >>>> RDX: 1ffff110037d9011 RSI: 0000000000000004 RDI: 0000000000000001 >>>> RBP: ffff88801bec8088 R08: 0000000000000000 R09: ffff88801bec804b >>>> R10: ffffed10037d9009 R11: 0000000000000000 R12: ffff88801bec8040 >>>> R13: ffff88801e029d40 R14: dffffc0000000000 R15: ffff88807eb50000 >>>> FS: 00005555573ad300(0000) GS:ffff8880b9c00000(0000) knlGS:0000000000000000 >>>> CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 >>>> CR2: 00000000200000c0 CR3: 000000001e5e4000 CR4: 00000000003506f0 >>>> DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 >>>> DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 >>>> Call Trace: >>>> <TASK> >>>> wake_up_pollfree include/linux/wait.h:271 [inline] >>>> signalfd_cleanup+0x42/0x60 fs/signalfd.c:38 >>>> __cleanup_sighand kernel/fork.c:1596 [inline] >>>> __cleanup_sighand+0x72/0xb0 kernel/fork.c:1593 >>>> __exit_signal kernel/exit.c:159 [inline] >>>> release_task+0xc02/0x17e0 kernel/exit.c:200 >>>> wait_task_zombie kernel/exit.c:1117 [inline] >>>> wait_consider_task+0x2fa6/0x3b80 kernel/exit.c:1344 >>>> do_wait_thread kernel/exit.c:1407 [inline] >>>> do_wait+0x6ca/0xce0 kernel/exit.c:1524 >>>> kernel_wait4+0x14c/0x260 kernel/exit.c:1687 >>>> __do_sys_wait4+0x13f/0x150 kernel/exit.c:1715 >>>> 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 >>>> RIP: 0033:0x7facd6682386 >>>> Code: 0f 1f 40 00 31 c9 e9 09 00 00 00 66 0f 1f 84 00 00 00 00 00 49 89 ca 64 8b 04 25 18 00 00 00 85 c0 75 11 b8 3d 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 5a c3 90 48 83 ec 28 89 54 24 14 48 89 74 24 >>>> RSP: 002b:00007ffdb91adef8 EFLAGS: 00000246 ORIG_RAX: 000000000000003d >>>> RAX: ffffffffffffffda RBX: 000000000000c646 RCX: 00007facd6682386 >>>> RDX: 0000000040000001 RSI: 00007ffdb91adf14 RDI: 00000000ffffffff >>>> RBP: 0000000000000f17 R08: 0000000000000032 R09: 00007ffdb91ec080 >>>> R10: 0000000000000000 R11: 0000000000000246 R12: 431bde82d7b634db >>>> R13: 00007ffdb91adf14 R14: 0000000000000000 R15: 0000000000000000 >>>> </TASK> >>>> >>>> >>>> --- >>>> 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. >>>> For information about bisection process see: https://goo.gl/tpsmEJ#bisection >>>> syzbot can test patches for this issue, for details see: >>>> https://goo.gl/tpsmEJ#testing-patches >>> >>> -- >>> You received this message because you are subscribed to the Google Groups "syzkaller-bugs" group. >>> To unsubscribe from this group and stop receiving emails from it, send an email to syzkaller-bugs+unsubscribe@googlegroups.com. >>> To view this discussion on the web visit https://groups.google.com/d/msgid/syzkaller-bugs/CANn89iK3tP3rANSWM7_%3DimMeMcUknT0U2GyfA9W4v12ad6_PkQ%40mail.gmail.com. > -- Pavel Begunkov ^ permalink raw reply [flat|nested] 6+ messages in thread
* Re: [syzbot] WARNING in signalfd_cleanup 2022-01-14 1:55 ` Pavel Begunkov @ 2022-01-14 2:09 ` syzbot 0 siblings, 0 replies; 6+ messages in thread From: syzbot @ 2022-01-14 2:09 UTC (permalink / raw) To: asml.silence, axboe, changbin.du, daniel, davem, ebiggers, edumazet, hkallweit1, io-uring, kuba, linux-fsdevel, linux-kernel, netdev, syzkaller-bugs, viro, yajun.deng Hello, syzbot has tested the proposed patch and the reproducer did not trigger any issue: Reported-and-tested-by: syzbot+5426c7ed6868c705ca14@syzkaller.appspotmail.com Tested on: commit: 59fb37ef io_uring: pollfree git tree: https://github.com/isilence/linux.git pollfree_test1 kernel config: https://syzkaller.appspot.com/x/.config?x=d2aaa2946b030309 dashboard link: https://syzkaller.appspot.com/bug?extid=5426c7ed6868c705ca14 compiler: gcc (Debian 10.2.1-6) 10.2.1 20210110, GNU ld (GNU Binutils for Debian) 2.35.2 Note: testing is done by a robot and is best-effort only. ^ permalink raw reply [flat|nested] 6+ messages in thread
end of thread, other threads:[~2022-01-14 2:09 UTC | newest] Thread overview: 6+ messages (download: mbox.gz / follow: Atom feed) -- links below jump to the message on this page -- 2022-01-05 15:37 [syzbot] WARNING in signalfd_cleanup syzbot 2022-01-05 15:42 ` Eric Dumazet 2022-01-05 15:52 ` Eric Biggers 2022-01-05 17:37 ` Pavel Begunkov 2022-01-14 1:55 ` Pavel Begunkov 2022-01-14 2:09 ` syzbot
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