Module Name: src
Committed By: nia
Date: Fri Oct 9 10:41:53 UTC 2020
Modified Files:
src/sys/compat/common: tty_43.c
Log Message:
tty_43: Check a bitset from userspace is valid before shifting it
Passing a negative value to these legacy compat ioctls results in
left shift on a negative value which is undefined behaviour and results
in the tty (at least, possibly other things) locking up.
The argument to the ioctl should always be > 0. Return EINVAL otherwise.
While here, adjustments to code style to match current guidelines.
Found by UBSan.
Reported-by: syzbot+39cd551a05298b222...@syzkaller.appspotmail.com
To generate a diff of this commit:
cvs rdiff -u -r1.37 -r1.38 src/sys/compat/common/tty_43.c
Please note that diffs are not public domain; they are subject to the
copyright notices on the relevant files.
