K 10
svn:author
V 3
fuz
K 8
svn:date
V 27
2023-07-21T08:58:16.752561Z
K 7
svn:log
V 772
lib/libc/string/bcmp.c: fix integer overflow bug

bcmp() returned the number of remaining bytes when the main loop exits.
In case of a match, this is zero, else a positive integer.  On systems
where SIZE_MAX > INT_MAX, the implicit conversion from size_t to int in
the return value may cause the number of remaining bytes to overflow,
becoming zero and falsely indicating a successful comparison.

Fix the bug by always returning 0 on equality, 1 otherwise.

PR:		272474
Approved by:	emaste
Reviewed by:	imp
MFC After:	1 week
Sponsored by:	The FreeBSD Foundation
Differential Revision: https://reviews.freebsd.org/D41011

(cherry picked from commit 4da7282a1882fc03c99591c27d44a2e6dfda364b)

Git Hash:   99544e13eec1586552470bd9d5f3b24038891401
Git Author: fuz@FreeBSD.org
END