linux-kernel - Re: [syzbot] [squashfs?] VFS: Close: file count is zero (use-after-free)

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Date: Thu, 13 Jun 2024 00:10:02 -0700
From: syzbot <syzbot+b2cfdac9ae5278d4b621@...kaller.appspotmail.com>
To: airlied@...hat.com, akpm@...ux-foundation.org, brauner@...nel.org, 
	jack@...e.cz, kraxel@...hat.com, linux-fsdevel@...r.kernel.org, 
	linux-kernel@...r.kernel.org, phillip@...ashfs.org.uk, 
	squashfs-devel@...ts.sourceforge.net, syzkaller-bugs@...glegroups.com, 
	viro@...iv.linux.org.uk, vivek.kasireddy@...el.com
Subject: Re: [syzbot] [squashfs?] VFS: Close: file count is zero (use-after-free)

Hello,

syzbot has tested the proposed patch and the reproducer did not trigger any issue:

Reported-and-tested-by: syzbot+b2cfdac9ae5278d4b621@...kaller.appspotmail.com

Tested on:

commit:         c7db1220 fixup! udmabuf: pin the pages using memfd_pin..
git tree:       https://gitlab.freedesktop.org/Vivek/drm-tip.git syzbot_fixes
console output: https://syzkaller.appspot.com/x/log.txt?x=11b1bb36980000
kernel config:  https://syzkaller.appspot.com/x/.config?x=58a2adb83f90b327
dashboard link: https://syzkaller.appspot.com/bug?extid=b2cfdac9ae5278d4b621
compiler:       Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40

Note: no patches were applied.
Note: testing is done by a robot and is best-effort only.