Re: [syzbot] [f2fs?] KASAN: slab-use-after-free Read in kill_f2fs_super

[Eric Biggers]

On Fri, Jan 12, 2024 at 04:32:21PM -0800, syzbot wrote:
> loop0: detected capacity change from 0 to 63271
> F2FS-fs (loop0): Mismatch start address, segment0(512) cp_blkaddr(605)
> F2FS-fs (loop0): Can't find valid F2FS filesystem in 1th superblock
> F2FS-fs (loop0): invalid crc value
> F2FS-fs (loop0): SIT is corrupted node# 0 vs 1
> F2FS-fs (loop0): Failed to initialize F2FS segment manager (-117)
> ==================================================================
> BUG: KASAN: slab-use-after-free in destroy_device_list fs/f2fs/super.c:1606 [inline]
> BUG: KASAN: slab-use-after-free in kill_f2fs_super+0x618/0x690 fs/f2fs/super.c:4932
> Read of size 4 at addr ffff888023bdd77c by task syz-executor275/5046

Sorry, this is my fault.  I'll fix this.

- Eric