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

[syzbot]

syzbot has bisected this issue to:

commit 9578e327b2b4935a25d49e3891b8fcca9b6c10c6
Author: Luis Henriques <lhenriques at suse.de>
Date:   Tue Jan 30 10:13:44 2024 +0000

    keys: update key quotas in key_put()

bisection log:  https://syzkaller.appspot.com/x/bisect.txt?x=10821bf7980000
start commit:   adc218676eef Linux 6.12
git tree:       upstream
final oops:     https://syzkaller.appspot.com/x/report.txt?x=12821bf7980000
console output: https://syzkaller.appspot.com/x/log.txt?x=14821bf7980000
kernel config:  https://syzkaller.appspot.com/x/.config?x=55f8591b98dd132
dashboard link: https://syzkaller.appspot.com/bug?extid=6105ffc1ded71d194d6d
syz repro:      https://syzkaller.appspot.com/x/repro.syz?x=12dbbb5f980000
C reproducer:   https://syzkaller.appspot.com/x/repro.c?x=11c672e8580000

Reported-by: syzbot+6105ffc1ded71d194d6d at syzkaller.appspotmail.com
Fixes: 9578e327b2b4 ("keys: update key quotas in key_put()")

For information about bisection process see: https://goo.gl/tpsmEJ#bisection