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Date:   Sun, 2 Jul 2023 16:58:33 -0700 (PDT)
From:   David Rientjes <rientjes@google.com>
To:     syzbot <syzbot+cf0693aee9ea61dda749@syzkaller.appspotmail.com>
cc:     42.hyeyoo@gmail.com, Andrew Morton <akpm@linux-foundation.org>,
        cl@linux.com, iamjoonsoo.kim@lge.com, keescook@chromium.org,
        linux-fsdevel@vger.kernel.org, linux-hardening@vger.kernel.org,
        linux-kernel@vger.kernel.org, linux-mm@kvack.org,
        penberg@kernel.org, reiserfs-devel@vger.kernel.org,
        roman.gushchin@linux.dev, syzkaller-bugs@googlegroups.com,
        Vlastimil Babka <vbabka@suse.cz>, Jan Kara <jack@suse.cz>
Subject: Re: [syzbot] [mm?] [reiserfs?] kernel panic: stack is corrupted in
 ___slab_alloc
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Message-ID: <1bb83e9d-6d7e-3c80-12f6-847bf2dc865e@google.com>
References: <0000000000002373f005ff843b58@google.com>
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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@syzkaller.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 :/

> 
> ---
> This report is generated by a bot. It may contain errors.
> See https://goo.gl/tpsmEJ for more information about syzbot.
> syzbot engineers can be reached at syzkaller@googlegroups.com.
> 
> syzbot will keep track of this issue. See:
> https://goo.gl/tpsmEJ#status for how to communicate with syzbot.
> 
> If the bug is already fixed, let syzbot know by replying with:
> #syz fix: exact-commit-title
> 
> If you want syzbot to run the reproducer, reply with:
> #syz test: git://repo/address.git branch-or-commit-hash
> If you attach or paste a git patch, syzbot will apply it before testing.
> 
> If you want to change bug's subsystems, reply with:
> #syz set subsystems: new-subsystem
> (See the list of subsystem names on the web dashboard)
> 
> If the bug is a duplicate of another bug, reply with:
> #syz dup: exact-subject-of-another-report
> 
> If you want to undo deduplication, reply with:
> #syz undup
>