On 5/15/22 8:52 AM, syzbot wrote:
> Hello,
>
> syzbot found the following issue on:
>
> HEAD commit: 1e1b28b936ae Add linux-next specific files for 20220513
> git tree: linux-next
> console+strace: https://syzkaller.appspot.com/x/log.txt?x=10872211f00000
> kernel config: https://syzkaller.appspot.com/x/.config?x=e4eb3c0c4b289571
> dashboard link: https://syzkaller.appspot.com/bug?extid=987d7bb19195ae45208c
> 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=1141bd21f00000
> C reproducer: https://syzkaller.appspot.com/x/repro.c?x=167ebdbef00000
>
> The issue was bisected to:
>
> commit 6da69b1da130e7d96766042750cd9f902e890eba
> Author: Xiaomeng Tong <[email protected]>
> Date: Mon Mar 28 03:24:31 2022 +0000
>
> net: dsa: bcm_sf2_cfp: fix an incorrect NULL check on list iterator
That looks totally unrelated...
#syz test: git://git.kernel.dk/linux-block.git for-next
--
Jens Axboe
Hello,
syzbot has tested the proposed patch but the reproducer is still triggering an issue:
WARNING: still has locks held in io_ring_submit_lock
====================================
WARNING: iou-wrk-4175/4176 still has locks held!
5.18.0-rc6-syzkaller-00294-gdf8dc7004331 #0 Not tainted
------------------------------------
1 lock held by iou-wrk-4175/4176:
#0: ffff888019d050a8 (&ctx->uring_lock){+.+.}-{3:3}, at: io_ring_submit_lock+0x75/0xc0 fs/io_uring.c:1500
stack backtrace:
CPU: 1 PID: 4176 Comm: iou-wrk-4175 Not tainted 5.18.0-rc6-syzkaller-00294-gdf8dc7004331 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
<TASK>
__dump_stack lib/dump_stack.c:88 [inline]
dump_stack_lvl+0xcd/0x134 lib/dump_stack.c:106
try_to_freeze include/linux/freezer.h:66 [inline]
get_signal+0x17bb/0x24c0 kernel/signal.c:2654
io_wqe_worker+0x64b/0xdb0 fs/io-wq.c:663
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:298
</TASK>
Tested on:
commit: df8dc700 Merge branch 'for-5.19/block' into for-next
git tree: git://git.kernel.dk/linux-block.git for-next
console output: https://syzkaller.appspot.com/x/log.txt?x=1275d495f00000
kernel config: https://syzkaller.appspot.com/x/.config?x=7b4d7b33ae78f4c2
dashboard link: https://syzkaller.appspot.com/bug?extid=987d7bb19195ae45208c
compiler: gcc (Debian 10.2.1-6) 10.2.1 20210110, GNU ld (GNU Binutils for Debian) 2.35.2
Note: no patches were applied.