Re: [syzbot] [mm?] [reiserfs?] kernel panic: stack is corrupted in ___slab_alloc

[David Rientjes <rientjes@google.com>]

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 :/

> 
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