Re: [syzbot] [fbdev?] KASAN: global-out-of-bounds Read in bit_putcs (3)

syzbot
2025-10-17T11:44:03Z

Hello,

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

Reported-by: syzbot+793cf822d213be1a74f2@syzkaller.appspotmail.com
Tested-by: syzbot+793cf822d213be1a74f2@syzkaller.appspotmail.com

Tested on:

commit: 0242b25b fbdev: bitblit: bound-check glyph index in bi..
git tree: https://github.com/Junjie650/linux.git fix/fbdev-bit_putcs-gobounds-v2
console output: https://syzkaller.appspot.com/x/log.txt?x=17787dcd980000
kernel config: https://syzkaller.appspot.com/x/.config?x=ce567f861793202d
dashboard link: https://syzkaller.appspot.com/bug?extid=793cf822d213be1a74f2
compiler: Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8
userspace arch: arm64

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