[syzbot] [keyrings?] [lsm?] KASAN: slab-use-after-free Read in key_put

[syzbot]

Hello,

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

Reported-by: syzbot+6105ffc1ded71d194d6d at syzkaller.appspotmail.com
Tested-by: syzbot+6105ffc1ded71d194d6d at syzkaller.appspotmail.com

Tested on:

commit:         81e4f8d6 Merge tag 'pmdomain-v6.14-rc4' of git://git.k..
git tree:       upstream
console output: https://syzkaller.appspot.com/x/log.txt?x=1216744c580000
kernel config:  https://syzkaller.appspot.com/x/.config?x=14213ea05709bce7
dashboard link: https://syzkaller.appspot.com/bug?extid=6105ffc1ded71d194d6d
compiler:       gcc (Debian 12.2.0-14) 12.2.0, GNU ld (GNU Binutils for Debian) 2.40
patch:          https://syzkaller.appspot.com/x/patch.diff?x=16bb93b0580000

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