CVS commit: src/sys/kern

["Taylor R Campbell" <riastradh%netbsd.org@localhost>]

Module Name:    src
Committed By:   riastradh
Date:           Fri Nov 25 16:15:39 UTC 2022

Modified Files:
        src/sys/kern: vfs_lockf.c

Log Message:
kern/vfs_lockf.c: Parenthesize to make arithmetic match check.

We verified start + (fl->fl_len - 1) would not overflow, but then
computed (start + fl->fl_len) - 1 instead, and it is possible for
start + fl->fl_len to overflow before we subtract 1.

Reported-by: syzbot+762480b00cb14085f63a%syzkaller.appspotmail.com@localhost
https://syzkaller.appspot.com/bug?id=d69313b2460a12715315f9f5f74fbe44b8bc38ba


To generate a diff of this commit:
cvs rdiff -u -r1.77 -r1.78 src/sys/kern/vfs_lockf.c

Please note that diffs are not public domain; they are subject to the
copyright notices on the relevant files.