From: Pavel Begunkov <asml.silence@gmail.com>
To: syzbot <syzbot+ac957324022b7132accf@syzkaller.appspotmail.com>,
axboe@kernel.dk, io-uring@vger.kernel.org,
linux-kernel@vger.kernel.org, mingo@kernel.org, mingo@redhat.com,
peterz@infradead.org, rostedt@goodmis.org,
syzkaller-bugs@googlegroups.com, will@kernel.org
Subject: Re: [syzbot] INFO: task hung in io_sq_thread_park (2)
Date: Fri, 16 Jul 2021 11:38:33 +0100 [thread overview]
Message-ID: <632ddc1b-b664-3e60-90be-03bdf556aa49@gmail.com> (raw)
In-Reply-To: <000000000000494b5f05c73277cd@google.com>
On 7/16/21 1:14 AM, syzbot wrote:
> Hello,
>
> syzbot has tested the proposed patch but the reproducer is still triggering an issue:
> WARNING in io_uring_cancel_generic
attempt to get stats #2
#syz test: https://github.com/isilence/linux.git syztest_sqpoll_hang
>
> ------------[ cut here ]------------
> WARNING: CPU: 1 PID: 25279 at fs/io_uring.c:9122 io_dump fs/io_uring.c:9117 [inline]
> WARNING: CPU: 1 PID: 25279 at fs/io_uring.c:9122 io_uring_cancel_generic+0x5fb/0xe50 fs/io_uring.c:9195
> Modules linked in:
> CPU: 1 PID: 25279 Comm: iou-sqp-25271 Tainted: G W 5.14.0-rc1-syzkaller #0
> Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
> RIP: 0010:io_dump fs/io_uring.c:9122 [inline]
> RIP: 0010:io_uring_cancel_generic+0x5fb/0xe50 fs/io_uring.c:9195
> Code: 08 00 00 48 b8 00 00 00 00 00 fc ff df 48 89 fa 48 c1 ea 03 80 3c 02 00 0f 85 9e 06 00 00 48 8b 85 10 08 00 00 48 89 44 24 40 <0f> 0b 48 8b 44 24 10 48 05 98 00 00 00 48 89 c2 48 89 44 24 08 48
> RSP: 0018:ffffc9000ab87c50 EFLAGS: 00010246
> RAX: ffff88803ddb7800 RBX: ffff888049f73880 RCX: 0000000000000000
> RDX: 1ffff110093ee812 RSI: ffffffff81e2ebed RDI: ffff888049f74090
> RBP: ffff888049f73880 R08: 0000000000000000 R09: 0000000000000000
> R10: ffffffff81e2ebc5 R11: 0000000000000001 R12: ffffc9000ab87d40
> R13: ffff88803ddb7858 R14: 0000000000000001 R15: 0000000000000000
> FS: 00007fb893f40700(0000) GS:ffff8880b9c00000(0000) knlGS:0000000000000000
> CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
> CR2: 00007f68dd0c6080 CR3: 000000002b457000 CR4: 0000000000350ef0
> Call Trace:
> io_sq_thread+0xaac/0x1250 fs/io_uring.c:6930
> ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295
> Kernel panic - not syncing: panic_on_warn set ...
> CPU: 1 PID: 25279 Comm: iou-sqp-25271 Tainted: G W 5.14.0-rc1-syzkaller #0
> Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
> Call Trace:
> __dump_stack lib/dump_stack.c:88 [inline]
> dump_stack_lvl+0xcd/0x134 lib/dump_stack.c:105
> panic+0x306/0x73d kernel/panic.c:232
> __warn.cold+0x35/0x44 kernel/panic.c:606
> report_bug+0x1bd/0x210 lib/bug.c:199
> handle_bug+0x3c/0x60 arch/x86/kernel/traps.c:239
> exc_invalid_op+0x14/0x40 arch/x86/kernel/traps.c:259
> asm_exc_invalid_op+0x12/0x20 arch/x86/include/asm/idtentry.h:566
> RIP: 0010:io_dump fs/io_uring.c:9122 [inline]
> RIP: 0010:io_uring_cancel_generic+0x5fb/0xe50 fs/io_uring.c:9195
> Code: 08 00 00 48 b8 00 00 00 00 00 fc ff df 48 89 fa 48 c1 ea 03 80 3c 02 00 0f 85 9e 06 00 00 48 8b 85 10 08 00 00 48 89 44 24 40 <0f> 0b 48 8b 44 24 10 48 05 98 00 00 00 48 89 c2 48 89 44 24 08 48
> RSP: 0018:ffffc9000ab87c50 EFLAGS: 00010246
> RAX: ffff88803ddb7800 RBX: ffff888049f73880 RCX: 0000000000000000
> RDX: 1ffff110093ee812 RSI: ffffffff81e2ebed RDI: ffff888049f74090
> RBP: ffff888049f73880 R08: 0000000000000000 R09: 0000000000000000
> R10: ffffffff81e2ebc5 R11: 0000000000000001 R12: ffffc9000ab87d40
> R13: ffff88803ddb7858 R14: 0000000000000001 R15: 0000000000000000
> io_sq_thread+0xaac/0x1250 fs/io_uring.c:6930
> ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295
> Kernel Offset: disabled
> Rebooting in 86400 seconds..
>
>
> Tested on:
>
> commit: d55b8f3c io_uring: add syz debug info
> git tree: https://github.com/isilence/linux.git syztest_sqpoll_hang
> console output: https://syzkaller.appspot.com/x/log.txt?x=16f6cb80300000
> kernel config: https://syzkaller.appspot.com/x/.config?x=cfe2c0e42bc9993d
> dashboard link: https://syzkaller.appspot.com/bug?extid=ac957324022b7132accf
> compiler:
>
--
Pavel Begunkov
next prev parent reply other threads:[~2021-07-16 10:39 UTC|newest]
Thread overview: 14+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-07-15 3:19 [syzbot] INFO: task hung in io_sq_thread_park (2) syzbot
2021-07-15 8:44 ` Pavel Begunkov
2021-07-15 9:15 ` syzbot
2021-07-15 18:16 ` Pavel Begunkov
2021-07-16 0:14 ` syzbot
2021-07-16 10:38 ` Pavel Begunkov [this message]
2021-07-16 10:57 ` syzbot
2021-07-19 13:15 ` Pavel Begunkov
2021-07-19 13:46 ` syzbot
2021-07-19 16:57 ` Pavel Begunkov
2021-07-19 17:13 ` Jens Axboe
2021-07-19 17:28 ` Pavel Begunkov
2021-07-19 18:38 ` Jens Axboe
2021-07-19 17:15 ` syzbot
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=632ddc1b-b664-3e60-90be-03bdf556aa49@gmail.com \
--to=asml.silence@gmail.com \
--cc=axboe@kernel.dk \
--cc=io-uring@vger.kernel.org \
--cc=linux-kernel@vger.kernel.org \
--cc=mingo@kernel.org \
--cc=mingo@redhat.com \
--cc=peterz@infradead.org \
--cc=rostedt@goodmis.org \
--cc=syzbot+ac957324022b7132accf@syzkaller.appspotmail.com \
--cc=syzkaller-bugs@googlegroups.com \
--cc=will@kernel.org \
/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.