linux-kernel - Re: [syzbot] KASAN: use-after-free Write in gadgetfs_kill

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Message-ID: <0000000000008ca17805efbbc87f@google.com>
Date:   Tue, 13 Dec 2022 12:51:26 -0800
From:   syzbot <syzbot+33d7ad66d65044b93f16@...kaller.appspotmail.com>
To:     gregkh@...uxfoundation.org, hbh25y@...il.com,
        linux-kernel@...r.kernel.org, linux-usb@...r.kernel.org,
        mingo@...nel.org, rdunlap@...radead.org, stern@...land.harvard.edu,
        syzkaller-bugs@...glegroups.com
Subject: Re: [syzbot] KASAN: use-after-free Write 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: { P4116 } 2668 jiffies s: 2777 root: 0x0/T
rcu: blocking rcu_node structures (internal RCU debug):


Tested on:

commit:         830b3c68 Linux 6.1
git tree:       https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/
console output: https://syzkaller.appspot.com/x/log.txt?x=12066e8b880000
kernel config:  https://syzkaller.appspot.com/x/.config?x=5a194ed4fc682723
dashboard link: https://syzkaller.appspot.com/bug?extid=33d7ad66d65044b93f16
compiler:       Debian clang version 13.0.1-++20220126092033+75e33f71c2da-1~exp1~20220126212112.63, GNU ld (GNU Binutils for Debian) 2.35.2
patch:          https://syzkaller.appspot.com/x/patch.diff?x=16793e8f880000