From a6e6a1e05b5ea28e8f8b3696c0e7748923cb1da4 Mon Sep 17 00:00:00 2001 From: Jim Meyering Date: Sat, 24 Jun 2000 07:37:44 +0000 Subject: (sysv_sum_file): Avoid overflowing 32-bit accumulator on files larger than 256 MB. --- src/sum.c | 3 +++ 1 file changed, 3 insertions(+) (limited to 'src/sum.c') diff --git a/src/sum.c b/src/sum.c index b012182c8..745093109 100644 --- a/src/sum.c +++ b/src/sum.c @@ -176,6 +176,9 @@ sysv_sum_file (const char *file, int print_name) for (i = 0; i < bytes_read; i++) checksum += buf[i]; + /* Reduce checksum mod 0xffff, to avoid overflow. */ + checksum = (checksum & 0xffff) + (checksum >> 16); + total_bytes += bytes_read; } -- cgit v1.2.3-54-g00ecf