Re: [syzbot] KASAN: use-after-free Read in gsm_cleanup_mux

[syzbot]

Hello,

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

Reported-and-tested-by: syzbot+893c55305230e719a203@xxxxxxxxxxxxxxxxxxxxxxxxx

Tested on:

commit:         a4412fdd error-injection: Add prompt for function erro..
git tree:       https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
console output: https://syzkaller.appspot.com/x/log.txt?x=152efe6b880000
kernel config:  https://syzkaller.appspot.com/x/.config?x=cc4b2e0a8e8a8366
dashboard link: https://syzkaller.appspot.com/bug?extid=893c55305230e719a203
compiler:       gcc (Debian 10.2.1-6) 10.2.1 20210110, GNU ld (GNU Binutils for Debian) 2.35.2
patch:          https://syzkaller.appspot.com/x/patch.diff?x=105f3bad880000

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