[syzbot] [erofs] KMSAN: uninit-value in ima_add_template_entry

[syzbot]

Hello,

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

Reported-and-tested-by: syzbot+7bc44a489f0ef0670bd5 at syzkaller.appspotmail.com

Tested on:

commit:         4288d8d1 erofs: fix uninitialized page cache reported ..
git tree:       git://git.kernel.org/pub/scm/linux/kernel/git/xiang/erofs.git dev-test
console output: https://syzkaller.appspot.com/x/log.txt?x=10893754180000
kernel config:  https://syzkaller.appspot.com/x/.config?x=db27810a659d0b3d
dashboard link: https://syzkaller.appspot.com/bug?extid=7bc44a489f0ef0670bd5
compiler:       Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40

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