Re: [syzbot] [fs?] KASAN: null-ptr-deref Read in ida_free (3)

[syzbot]

Hello,

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

Reported-and-tested-by: syzbot+8ac3859139c685c4f597@xxxxxxxxxxxxxxxxxxxxxxxxx

Tested on:

commit:         07cd4f12 fs: drop peer group ids under namespace lock
git tree:       git://git.kernel.org/pub/scm/linux/kernel/git/vfs/idmapping.git b4/vfs-mount_setattr-propagation-fix
console output: https://syzkaller.appspot.com/x/log.txt?x=163d4771c80000
kernel config:  https://syzkaller.appspot.com/x/.config?x=9c35b3803e5ad668
dashboard link: https://syzkaller.appspot.com/bug?extid=8ac3859139c685c4f597
compiler:       Debian clang version 15.0.7, GNU ld (GNU Binutils for Debian) 2.35.2

Note: no patches were applied.
Note: testing is done by a robot and is best-effort only.