WARNING in io_uring_flush
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syzbot
Jan 15, 2021, 10:57:18 AM1/15/21
to ax...@kernel.dk, io-u...@vger.kernel.org, linux-...@vger.kernel.org, linux-...@vger.kernel.org, syzkall...@googlegroups.com, vi...@zeniv.linux.org.uk
Hello,
syzbot found the following issue on:
HEAD commit: 14662050 Merge tag 'linux-kselftest-fixes-5.11-rc4' of git..
git tree: upstream
console output: https://syzkaller.appspot.com/x/log.txt?x=11a09ed0d00000
kernel config: https://syzkaller.appspot.com/x/.config?x=c066f800cf2824be
dashboard link: https://syzkaller.appspot.com/bug?extid=a32b546d58dde07875a1
compiler: gcc (GCC) 10.1.0-syz 20200507
Unfortunately, I don't have any reproducer for this issue yet.
IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+a32b54...@syzkaller.appspotmail.com
------------[ cut here ]------------
WARNING: CPU: 1 PID: 11100 at fs/io_uring.c:9096 io_uring_flush+0x326/0x3a0 fs/io_uring.c:9096
Modules linked in:
CPU: 1 PID: 11100 Comm: syz-executor.3 Not tainted 5.11.0-rc3-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
RIP: 0010:io_uring_flush+0x326/0x3a0 fs/io_uring.c:9096
Code: e9 58 fe ff ff e8 6a 21 9b ff 49 c7 84 24 a0 00 00 00 00 00 00 00 e9 aa fe ff ff e8 44 9c dd ff e9 91 fd ff ff e8 4a 21 9b ff <0f> 0b e9 51 ff ff ff e8 3e 9c dd ff e9 06 fd ff ff 4c 89 f7 e8 31
RSP: 0018:ffffc90000fd7aa0 EFLAGS: 00010293
RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000000
RDX: ffff8880758de140 RSI: ffffffff81d7aac6 RDI: 0000000000000003
RBP: ffff8880264d8500 R08: 0000000000000000 R09: 0000000028eda801
R10: ffffffff81d7aa15 R11: 0000000000000000 R12: ffff888035f73000
R13: ffff888028eda801 R14: ffff888035f73040 R15: ffff888035f730d0
FS: 0000000000000000(0000) GS:ffff8880b9f00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f16cd441710 CR3: 000000006924f000 CR4: 00000000001506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
filp_close+0xb4/0x170 fs/open.c:1280
close_files fs/file.c:401 [inline]
put_files_struct fs/file.c:416 [inline]
put_files_struct+0x1cc/0x350 fs/file.c:413
exit_files+0x7e/0xa0 fs/file.c:433
do_exit+0xc22/0x2ae0 kernel/exit.c:820
do_group_exit+0x125/0x310 kernel/exit.c:922
get_signal+0x3e9/0x20a0 kernel/signal.c:2770
arch_do_signal_or_restart+0x2a8/0x1eb0 arch/x86/kernel/signal.c:811
handle_signal_work kernel/entry/common.c:147 [inline]
exit_to_user_mode_loop kernel/entry/common.c:171 [inline]
exit_to_user_mode_prepare+0x148/0x250 kernel/entry/common.c:201
__syscall_exit_to_user_mode_work kernel/entry/common.c:291 [inline]
syscall_exit_to_user_mode+0x19/0x50 kernel/entry/common.c:302
entry_SYSCALL_64_after_hwframe+0x44/0xa9
RIP: 0033:0x45e219
Code: Unable to access opcode bytes at RIP 0x45e1ef.
RSP: 002b:00007f49d69f3c68 EFLAGS: 00000246 ORIG_RAX: 000000000000002c
RAX: ffffffffffffffe0 RBX: 0000000000000006 RCX: 000000000045e219
RDX: ffffffffffffffef RSI: 0000000020d7cfcb RDI: 0000000000000007
RBP: 000000000119bfd8 R08: 0000000000000000 R09: 00000000ffffffd8
R10: 0000000000000000 R11: 0000000000000246 R12: 000000000119bf8c
R13: 00007fff13b97d2f R14: 00007f49d69f49c0 R15: 000000000119bf8c
---
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 syzk...@googlegroups.com.
syzbot will keep track of this issue. See:
https://goo.gl/tpsmEJ#status for how to communicate with syzbot.
syzbot found the following issue on:
HEAD commit: 14662050 Merge tag 'linux-kselftest-fixes-5.11-rc4' of git..
git tree: upstream
console output: https://syzkaller.appspot.com/x/log.txt?x=11a09ed0d00000
kernel config: https://syzkaller.appspot.com/x/.config?x=c066f800cf2824be
dashboard link: https://syzkaller.appspot.com/bug?extid=a32b546d58dde07875a1
compiler: gcc (GCC) 10.1.0-syz 20200507
Unfortunately, I don't have any reproducer for this issue yet.
IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+a32b54...@syzkaller.appspotmail.com
------------[ cut here ]------------
WARNING: CPU: 1 PID: 11100 at fs/io_uring.c:9096 io_uring_flush+0x326/0x3a0 fs/io_uring.c:9096
Modules linked in:
CPU: 1 PID: 11100 Comm: syz-executor.3 Not tainted 5.11.0-rc3-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
RIP: 0010:io_uring_flush+0x326/0x3a0 fs/io_uring.c:9096
Code: e9 58 fe ff ff e8 6a 21 9b ff 49 c7 84 24 a0 00 00 00 00 00 00 00 e9 aa fe ff ff e8 44 9c dd ff e9 91 fd ff ff e8 4a 21 9b ff <0f> 0b e9 51 ff ff ff e8 3e 9c dd ff e9 06 fd ff ff 4c 89 f7 e8 31
RSP: 0018:ffffc90000fd7aa0 EFLAGS: 00010293
RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000000
RDX: ffff8880758de140 RSI: ffffffff81d7aac6 RDI: 0000000000000003
RBP: ffff8880264d8500 R08: 0000000000000000 R09: 0000000028eda801
R10: ffffffff81d7aa15 R11: 0000000000000000 R12: ffff888035f73000
R13: ffff888028eda801 R14: ffff888035f73040 R15: ffff888035f730d0
FS: 0000000000000000(0000) GS:ffff8880b9f00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f16cd441710 CR3: 000000006924f000 CR4: 00000000001506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
filp_close+0xb4/0x170 fs/open.c:1280
close_files fs/file.c:401 [inline]
put_files_struct fs/file.c:416 [inline]
put_files_struct+0x1cc/0x350 fs/file.c:413
exit_files+0x7e/0xa0 fs/file.c:433
do_exit+0xc22/0x2ae0 kernel/exit.c:820
do_group_exit+0x125/0x310 kernel/exit.c:922
get_signal+0x3e9/0x20a0 kernel/signal.c:2770
arch_do_signal_or_restart+0x2a8/0x1eb0 arch/x86/kernel/signal.c:811
handle_signal_work kernel/entry/common.c:147 [inline]
exit_to_user_mode_loop kernel/entry/common.c:171 [inline]
exit_to_user_mode_prepare+0x148/0x250 kernel/entry/common.c:201
__syscall_exit_to_user_mode_work kernel/entry/common.c:291 [inline]
syscall_exit_to_user_mode+0x19/0x50 kernel/entry/common.c:302
entry_SYSCALL_64_after_hwframe+0x44/0xa9
RIP: 0033:0x45e219
Code: Unable to access opcode bytes at RIP 0x45e1ef.
RSP: 002b:00007f49d69f3c68 EFLAGS: 00000246 ORIG_RAX: 000000000000002c
RAX: ffffffffffffffe0 RBX: 0000000000000006 RCX: 000000000045e219
RDX: ffffffffffffffef RSI: 0000000020d7cfcb RDI: 0000000000000007
RBP: 000000000119bfd8 R08: 0000000000000000 R09: 00000000ffffffd8
R10: 0000000000000000 R11: 0000000000000246 R12: 000000000119bf8c
R13: 00007fff13b97d2f R14: 00007f49d69f49c0 R15: 000000000119bf8c
---
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 syzk...@googlegroups.com.
syzbot will keep track of this issue. See:
https://goo.gl/tpsmEJ#status for how to communicate with syzbot.
Pavel Begunkov
Jan 15, 2021, 11:31:24 PM1/15/21
to syzbot, ax...@kernel.dk, io-u...@vger.kernel.org, linux-...@vger.kernel.org, linux-...@vger.kernel.org, syzkall...@googlegroups.com, vi...@zeniv.linux.org.uk
On 15/01/2021 15:57, syzbot wrote:
> Hello,
>
> syzbot found the following issue on:
>
> HEAD commit: 14662050 Merge tag 'linux-kselftest-fixes-5.11-rc4' of git..
> git tree: upstream
> console output: https://syzkaller.appspot.com/x/log.txt?x=11a09ed0d00000
> kernel config: https://syzkaller.appspot.com/x/.config?x=c066f800cf2824be
> dashboard link: https://syzkaller.appspot.com/bug?extid=a32b546d58dde07875a1
> compiler: gcc (GCC) 10.1.0-syz 20200507
>
> Unfortunately, I don't have any reproducer for this issue yet.
>
> IMPORTANT: if you fix the issue, please add the following tag to the commit:
> Reported-by: syzbot+a32b54...@syzkaller.appspotmail.com
I know a case how it can happen, and if that's the only way then this
> Hello,
>
> syzbot found the following issue on:
>
> HEAD commit: 14662050 Merge tag 'linux-kselftest-fixes-5.11-rc4' of git..
> git tree: upstream
> console output: https://syzkaller.appspot.com/x/log.txt?x=11a09ed0d00000
> kernel config: https://syzkaller.appspot.com/x/.config?x=c066f800cf2824be
> dashboard link: https://syzkaller.appspot.com/bug?extid=a32b546d58dde07875a1
> compiler: gcc (GCC) 10.1.0-syz 20200507
>
> Unfortunately, I don't have any reproducer for this issue yet.
>
> IMPORTANT: if you fix the issue, please add the following tag to the commit:
> Reported-by: syzbot+a32b54...@syzkaller.appspotmail.com
is a false positive. I'll put up a patch and we'll if syzbot will
trigger it again.
Pavel Begunkov
syzbot
Jan 16, 2021, 9:03:17 AM1/16/21
to asml.s...@gmail.com, ax...@kernel.dk, hda...@sina.com, io-u...@vger.kernel.org, linux-...@vger.kernel.org, linux-...@vger.kernel.org, syzkall...@googlegroups.com, vi...@zeniv.linux.org.uk
syzbot has found a reproducer for the following issue on:
HEAD commit: 1d94330a Merge tag 'for-5.11/dm-fixes-1' of git://git.kern..
git tree: upstream
console output: https://syzkaller.appspot.com/x/log.txt?x=13210c3b500000
kernel config: https://syzkaller.appspot.com/x/.config?x=c60c9ff9cc916cbc
C reproducer: https://syzkaller.appspot.com/x/repro.c?x=15a2feb8d00000
IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+a32b54...@syzkaller.appspotmail.com
------------[ cut here ]------------
WARNING: CPU: 1 PID: 8613 at fs/io_uring.c:9096 io_uring_flush+0x326/0x3a0 fs/io_uring.c:9096
Modules linked in:
CPU: 1 PID: 8613 Comm: syz-executor948 Not tainted 5.11.0-rc3-syzkaller #0
RSP: 0018:ffffc90001a4faa0 EFLAGS: 00010293
RBP: ffff88801c862280 R08: 0000000000000000 R09: 00000000196e5401
R10: ffffffff81d7e585 R11: 0000000000000000 R12: ffff888019724000
R13: ffff8880196e5401 R14: ffff888019724040 R15: ffff8880197240d0
FS: 0000000000000000(0000) GS:ffff8880b9e00000(0000) knlGS:0000000000000000
Code: Unable to access opcode bytes at RIP 0x446b3f.
RSP: 002b:00007fbb80bcecf8 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca
RAX: fffffffffffffe00 RBX: 00000000006dbc28 RCX: 0000000000446b69
RDX: 0000000000000000 RSI: 0000000000000080 RDI: 00000000006dbc28
RBP: 00000000006dbc20 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00000000006dbc2c
R13: 00007ffc1b88469f R14: 00007fbb80bcf9c0 R15: 00000000006dbc2c
HEAD commit: 1d94330a Merge tag 'for-5.11/dm-fixes-1' of git://git.kern..
git tree: upstream
console output: https://syzkaller.appspot.com/x/log.txt?x=13210c3b500000
kernel config: https://syzkaller.appspot.com/x/.config?x=c60c9ff9cc916cbc
dashboard link: https://syzkaller.appspot.com/bug?extid=a32b546d58dde07875a1
compiler: gcc (GCC) 10.1.0-syz 20200507
syz repro: https://syzkaller.appspot.com/x/repro.syz?x=17d14c58d00000
compiler: gcc (GCC) 10.1.0-syz 20200507
C reproducer: https://syzkaller.appspot.com/x/repro.c?x=15a2feb8d00000
IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+a32b54...@syzkaller.appspotmail.com
------------[ cut here ]------------
Modules linked in:
CPU: 1 PID: 8613 Comm: syz-executor948 Not tainted 5.11.0-rc3-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
RIP: 0010:io_uring_flush+0x326/0x3a0 fs/io_uring.c:9096
Code: e9 58 fe ff ff e8 aa e3 9a ff 49 c7 84 24 a0 00 00 00 00 00 00 00 e9 aa fe ff ff e8 74 9e dd ff e9 91 fd ff ff e8 8a e3 9a ff <0f> 0b e9 51 ff ff ff e8 6e 9e dd ff e9 06 fd ff ff 4c 89 f7 e8 61
RIP: 0010:io_uring_flush+0x326/0x3a0 fs/io_uring.c:9096
RSP: 0018:ffffc90001a4faa0 EFLAGS: 00010293
RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000000
RDX: ffff88801113b780 RSI: ffffffff81d7e636 RDI: 0000000000000003
RBP: ffff88801c862280 R08: 0000000000000000 R09: 00000000196e5401
R10: ffffffff81d7e585 R11: 0000000000000000 R12: ffff888019724000
R13: ffff8880196e5401 R14: ffff888019724040 R15: ffff8880197240d0
FS: 0000000000000000(0000) GS:ffff8880b9e00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000000000000 CR3: 0000000025f8e000 CR4: 0000000000350ef0
Call Trace:
filp_close+0xb4/0x170 fs/open.c:1280
close_files fs/file.c:401 [inline]
put_files_struct fs/file.c:416 [inline]
put_files_struct+0x1cc/0x350 fs/file.c:413
exit_files+0x7e/0xa0 fs/file.c:433
do_exit+0xc22/0x2ae0 kernel/exit.c:820
do_group_exit+0x125/0x310 kernel/exit.c:922
get_signal+0x3e9/0x20a0 kernel/signal.c:2770
arch_do_signal_or_restart+0x2a8/0x1eb0 arch/x86/kernel/signal.c:811
handle_signal_work kernel/entry/common.c:147 [inline]
exit_to_user_mode_loop kernel/entry/common.c:171 [inline]
exit_to_user_mode_prepare+0x148/0x250 kernel/entry/common.c:201
__syscall_exit_to_user_mode_work kernel/entry/common.c:291 [inline]
syscall_exit_to_user_mode+0x19/0x50 kernel/entry/common.c:302
entry_SYSCALL_64_after_hwframe+0x44/0xa9
RIP: 0033:0x446b69
filp_close+0xb4/0x170 fs/open.c:1280
close_files fs/file.c:401 [inline]
put_files_struct fs/file.c:416 [inline]
put_files_struct+0x1cc/0x350 fs/file.c:413
exit_files+0x7e/0xa0 fs/file.c:433
do_exit+0xc22/0x2ae0 kernel/exit.c:820
do_group_exit+0x125/0x310 kernel/exit.c:922
get_signal+0x3e9/0x20a0 kernel/signal.c:2770
arch_do_signal_or_restart+0x2a8/0x1eb0 arch/x86/kernel/signal.c:811
handle_signal_work kernel/entry/common.c:147 [inline]
exit_to_user_mode_loop kernel/entry/common.c:171 [inline]
exit_to_user_mode_prepare+0x148/0x250 kernel/entry/common.c:201
__syscall_exit_to_user_mode_work kernel/entry/common.c:291 [inline]
syscall_exit_to_user_mode+0x19/0x50 kernel/entry/common.c:302
entry_SYSCALL_64_after_hwframe+0x44/0xa9
Code: Unable to access opcode bytes at RIP 0x446b3f.
RSP: 002b:00007fbb80bcecf8 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca
RAX: fffffffffffffe00 RBX: 00000000006dbc28 RCX: 0000000000446b69
RDX: 0000000000000000 RSI: 0000000000000080 RDI: 00000000006dbc28
RBP: 00000000006dbc20 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00000000006dbc2c
R13: 00007ffc1b88469f R14: 00007fbb80bcf9c0 R15: 00000000006dbc2c
Jens Axboe
Jan 16, 2021, 2:06:07 PM1/16/21
to syzbot, asml.s...@gmail.com, hda...@sina.com, io-u...@vger.kernel.org, linux-...@vger.kernel.org, linux-...@vger.kernel.org, syzkall...@googlegroups.com, vi...@zeniv.linux.org.uk
syzbot
Jan 16, 2021, 3:02:12 PM1/16/21
to asml.s...@gmail.com, ax...@kernel.dk, hda...@sina.com, io-u...@vger.kernel.org, linux-...@vger.kernel.org, linux-...@vger.kernel.org, syzkall...@googlegroups.com, vi...@zeniv.linux.org.uk
Hello,
syzbot has tested the proposed patch and the reproducer did not trigger any issue:
Reported-and-tested-by: syzbot+a32b54...@syzkaller.appspotmail.com
Tested on:
commit: 4325cb49 io_uring: fix uring_flush in exit_files() warning
git tree: git://git.kernel.dk/linux-block io_uring-5.11
kernel config: https://syzkaller.appspot.com/x/.config?x=c6b6b5cccb0f38f2
syzbot has tested the proposed patch and the reproducer did not trigger any issue:
Reported-and-tested-by: syzbot+a32b54...@syzkaller.appspotmail.com
Tested on:
commit: 4325cb49 io_uring: fix uring_flush in exit_files() warning
git tree: git://git.kernel.dk/linux-block io_uring-5.11
kernel config: https://syzkaller.appspot.com/x/.config?x=c6b6b5cccb0f38f2
dashboard link: https://syzkaller.appspot.com/bug?extid=a32b546d58dde07875a1
compiler: gcc (GCC) 10.1.0-syz 20200507
Note: testing is done by a robot and is best-effort only.
compiler: gcc (GCC) 10.1.0-syz 20200507
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