linux-kernel - Re: [syzbot] [fs?] general protection fault in pidfs_free

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <20250624-volldampf-brotscheiben-70bed5ac4dba@brauner>
Date: Tue, 24 Jun 2025 11:23:59 +0200
From: Christian Brauner <brauner@...nel.org>
To: syzbot <syzbot+25317a459958aec47bfa@...kaller.appspotmail.com>
Cc: jack@...e.cz, linux-fsdevel@...r.kernel.org, 
	linux-kernel@...r.kernel.org, syzkaller-bugs@...glegroups.com, viro@...iv.linux.org.uk
Subject: Re: [syzbot] [fs?] general protection fault in pidfs_free_pid

On Tue, Jun 24, 2025 at 01:45:35AM -0700, syzbot wrote:
> > On Mon, Jun 23, 2025 at 11:27:26AM -0700, syzbot wrote:
> >> Hello,
> >> 
> >> syzbot found the following issue on:
> >> 
> >> HEAD commit:    5d4809e25903 Add linux-next specific files for 20250620
> >> git tree:       linux-next
> >> console+strace: https://syzkaller.appspot.com/x/log.txt?x=150ef30c580000
> >> kernel config:  https://syzkaller.appspot.com/x/.config?x=58afc4b78b52b7e3
> >> dashboard link: https://syzkaller.appspot.com/bug?extid=25317a459958aec47bfa
> >> compiler:       Debian clang version 20.1.6 (++20250514063057+1e4d39e07757-1~exp1~20250514183223.118), Debian LLD 20.1.6
> >> syz repro:      https://syzkaller.appspot.com/x/repro.syz?x=10a5330c580000
> >> C reproducer:   https://syzkaller.appspot.com/x/repro.c?x=12c9f6bc580000
> >> 
> >> Downloadable assets:
> >> disk image: https://storage.googleapis.com/syzbot-assets/16492bf6b788/disk-5d4809e2.raw.xz
> >> vmlinux: https://storage.googleapis.com/syzbot-assets/7be284ded1de/vmlinux-5d4809e2.xz
> >> kernel image: https://storage.googleapis.com/syzbot-assets/467d717f0d9c/bzImage-5d4809e2.xz
> >> 
> >> The issue was bisected to:
> >> 
> >> commit fb0b3e2b2d7f213cb4fde623706f9ed6d748a373
> >> Author: Christian Brauner <brauner@...nel.org>
> >> Date:   Wed Jun 18 20:53:46 2025 +0000
> >> 
> >>     pidfs: support xattrs on pidfds
> >> 
> >> bisection log:  https://syzkaller.appspot.com/x/bisect.txt?x=15a1b370580000
> >> final oops:     https://syzkaller.appspot.com/x/report.txt?x=17a1b370580000
> >> console output: https://syzkaller.appspot.com/x/log.txt?x=13a1b370580000
> >> 
> >> IMPORTANT: if you fix the issue, please add the following tag to the commit:
> >> Reported-by: syzbot+25317a459958aec47bfa@...kaller.appspotmail.com
> >> Fixes: fb0b3e2b2d7f ("pidfs: support xattrs on pidfds")
> >
> > #syz test: 
> >
> > #syz test: https://git.kernel.org/pub/scm/linux/kernel/git/vfs/vfs.git vfs-6.17.pidfs
> 
> Command #1:
> want either no args or 2 args (repo, branch), got 4

#syz test: https://git.kernel.org/pub/scm/linux/kernel/git/vfs/vfs.git vfs-6.17.pidfs