Re: [syzbot] [bcache?] [ext4?] KASAN: use-after-free Read in register_bcache

[syzbot]

Hello,

syzbot has tested the proposed patch and the reproducer did not trigger any issue:

Reported-by: syzbot+cb5b32abe226710cdd8a@xxxxxxxxxxxxxxxxxxxxxxxxx
Tested-by: syzbot+cb5b32abe226710cdd8a@xxxxxxxxxxxxxxxxxxxxxxxxx

Tested on:

commit:         ba5cc80f Merge branch 'for-next/core' into for-kernelci
git tree:       git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git
console output: https://syzkaller.appspot.com/x/log.txt?x=15013279580000
kernel config:  https://syzkaller.appspot.com/x/.config?x=ccf4bea59f67007
dashboard link: https://syzkaller.appspot.com/bug?extid=cb5b32abe226710cdd8a
compiler:       Debian clang version 22.1.8 (++20260613092233+e80beda6e255-1~exp1~20260613092250.77), Debian LLD 22.1.8
userspace arch: arm64
patch:          https://syzkaller.appspot.com/x/patch.diff?x=1301a949580000

Note: testing is done by a robot and is best-effort only.