usr.bin/diff: fix UBSan error in readhash

UBSan complains about the `sum = sum * 127 + chrtran(t);` line below since
that can overflow an `int`. Use `unsigned int` instead to ensure that
overflow is well-defined.

Reviewed By:	imp
MFC after:	1 week
Differential Revision: https://reviews.freebsd.org/D31075

This commit is contained in:

Alex Richardson

2021-07-06 12:16:40 +01:00

parent 31914882fc

commit c78f449d85

1 changed files with 1 additions and 1 deletions

									
										usr.bin/diff/diffreg.c
									
		+1
		-1
	
												View File
												
				@@ -1345,7 +1345,7 @@ static int

				readhash(FILE *f, int flags)

				{

					int i, t, space;

					int sum;

					unsigned sum;

					sum = 1;

					space = 0;