linux-hardening - Re: [syzbot] [mm?] [reiserfs?] kernel panic: stack is corrupted in ___slab

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Date:   Mon, 3 Jul 2023 09:17:11 +0200
From:   Dmitry Vyukov <dvyukov@...gle.com>
To:     David Rientjes <rientjes@...gle.com>
Cc:     syzbot <syzbot+cf0693aee9ea61dda749@...kaller.appspotmail.com>,
        42.hyeyoo@...il.com, Andrew Morton <akpm@...ux-foundation.org>,
        cl@...ux.com, iamjoonsoo.kim@....com, keescook@...omium.org,
        linux-fsdevel@...r.kernel.org, linux-hardening@...r.kernel.org,
        linux-kernel@...r.kernel.org, linux-mm@...ck.org,
        penberg@...nel.org, reiserfs-devel@...r.kernel.org,
        roman.gushchin@...ux.dev, syzkaller-bugs@...glegroups.com,
        Vlastimil Babka <vbabka@...e.cz>, Jan Kara <jack@...e.cz>
Subject: Re: [syzbot] [mm?] [reiserfs?] kernel panic: stack is corrupted in ___slab_alloc

On Mon, 3 Jul 2023 at 09:14, 'David Rientjes' via syzkaller-bugs
<syzkaller-bugs@...glegroups.com> wrote:
>
> On Sun, 2 Jul 2023, syzbot wrote:
>
> > Hello,
> >
> > syzbot found the following issue on:
> >
> > HEAD commit:    e8f75c0270d9 Merge tag 'x86_sgx_for_v6.5' of git://git.ker..
> > git tree:       upstream
> > console output: https://syzkaller.appspot.com/x/log.txt?x=168b84fb280000
> > kernel config:  https://syzkaller.appspot.com/x/.config?x=a98ec7f738e43bd4
> > dashboard link: https://syzkaller.appspot.com/bug?extid=cf0693aee9ea61dda749
> > 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=10310670a80000
> > C reproducer:   https://syzkaller.appspot.com/x/repro.c?x=1220c777280000
> >
> > Downloadable assets:
> > disk image: https://storage.googleapis.com/syzbot-assets/f27c1d41217a/disk-e8f75c02.raw.xz
> > vmlinux: https://storage.googleapis.com/syzbot-assets/843ae5d5c810/vmlinux-e8f75c02.xz
> > kernel image: https://storage.googleapis.com/syzbot-assets/da48bc4c0ec1/bzImage-e8f75c02.xz
> > mounted in repro: https://storage.googleapis.com/syzbot-assets/658601e354e4/mount_0.gz
> >
> > IMPORTANT: if you fix the issue, please add the following tag to the commit:
> > Reported-by: syzbot+cf0693aee9ea61dda749@...kaller.appspotmail.com
> >
> > Kernel panic - not syncing: stack-protector: Kernel stack is corrupted in: ___slab_alloc+0x12c3/0x1400 mm/slub.c:3270
> > CPU: 0 PID: 5009 Comm: syz-executor248 Not tainted 6.4.0-syzkaller-01406-ge8f75c0270d9 #0
> > Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/27/2023
> > Call Trace:
> >  <TASK>
> >  __dump_stack lib/dump_stack.c:88 [inline]
> >  dump_stack_lvl+0xd9/0x150 lib/dump_stack.c:106
> >  panic+0x686/0x730 kernel/panic.c:340
> >  __stack_chk_fail+0x19/0x20 kernel/panic.c:759
> >  ___slab_alloc+0x12c3/0x1400 mm/slub.c:3270
> >
>
> This is happening during while mounting reiserfs, so I'm inclined to think
> it's more of a reisterfs issue than a slab allocator issue :/


Now we can make it official :)

#syz set subsystems: reiserfs

To remove from open mm issues:

https://syzkaller.appspot.com/upstream/s/mm

to reiserfs issues:

https://syzkaller.appspot.com/upstream/s/reiserfs