[syzbot] INFO: rcu detected stall in sys_mount (6)

[David Kahurani]

On Monday, September 27, 2021 at 9:50:20 PM UTC+3 syzbot wrote:

Hello,

syzbot found the following issue on:

HEAD commit: 5a5d008887b4 Add linux-next specific files for 20210924
git tree: linux-next
console output: https://syzkaller.appspot.com/x/log.txt?x=1187dccb300000
kernel config: https://syzkaller.appspot.com/x/.config?x=ae26deb010ccc26f
dashboard link: https://syzkaller.appspot.com/bug?extid=ee7d095f44a683a195f8
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=172aaf6f300000
C reproducer: https://syzkaller.appspot.com/x/repro.c?x=12667317300000

Bisection is inconclusive: the issue happens on the oldest tested release.

#syz test: git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master

[syzbot]

Hello,

syzbot has tested the proposed patch but the reproducer is still triggering an issue:
no output from test machine



Tested on:

commit: 3e732ebf Merge tag 'for_linus' of git://git.kernel.org..
git tree: upstream
console output: https://syzkaller.appspot.com/x/log.txt?x=1640f65b700000
kernel config: https://syzkaller.appspot.com/x/.config?x=dc457a5369f23227

dashboard link: https://syzkaller.appspot.com/bug?extid=ee7d095f44a683a195f8
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.

[David Kahurani]

On Thu, Apr 7, 2022 at 5:51 PM syzbot <syzbot+ee7d09...@syzkaller.appspotmail.com> wrote:

Hello,

syzbot has tested the proposed patch but the reproducer is still triggering an issue:
no output from test machine

Strange, because it is not in the log. The probe.