[syzbot] [erofs?] KMSAN: uninit-value in z_erofs_lz4_decompress (3)

[syzbot]

Hello,

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

Reported-and-tested-by: syzbot+88ad8b0517a9d3bb9dc8 at syzkaller.appspotmail.com

Tested on:

commit:         b3603fcb Merge tag 'dlm-6.9' of git://git.kernel.org/p..
git tree:       upstream
console output: https://syzkaller.appspot.com/x/log.txt?x=14395479180000
kernel config:  https://syzkaller.appspot.com/x/.config?x=c0f689e0798c5101
dashboard link: https://syzkaller.appspot.com/bug?extid=88ad8b0517a9d3bb9dc8
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.