linux-kernel - Re: [syzbot] WARNING: refcount bug in gadgetfs_kill

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Date:   Fri, 23 Dec 2022 05:44:24 -0800
From:   syzbot <syzbot+ac031e7435393ad05df6@...kaller.appspotmail.com>
To:     hdanton@...a.com, linux-kernel@...r.kernel.org,
        syzkaller-bugs@...glegroups.com
Subject: Re: [syzbot] WARNING: refcount bug in gadgetfs_kill_sb

Hello,

syzbot has tested the proposed patch but the reproducer is still triggering an issue:
INFO: rcu detected stall in corrupted

rcu: INFO: rcu_preempt detected expedited stalls on CPUs/tasks: { P4880 } 2641 jiffies s: 2057 root: 0x0/T
rcu: blocking rcu_node structures (internal RCU debug):

Tested on:

commit:         8395ae05 Merge tag 'scsi-misc' of git://git.kernel.org..
git tree:       https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
console output: https://syzkaller.appspot.com/x/log.txt?x=15632254480000
kernel config:  https://syzkaller.appspot.com/x/.config?x=17aadd57f57472c2
dashboard link: https://syzkaller.appspot.com/bug?extid=ac031e7435393ad05df6
compiler:       Debian clang version 13.0.1-++20220126092033+75e33f71c2da-1~exp1~20220126212112.63, GNU ld (GNU Binutils for Debian) 2.35.2
userspace arch: arm64
patch:          https://syzkaller.appspot.com/x/patch.diff?x=172f58ff880000