From: Paul Eggert Date: Tue, 21 Apr 2026 13:16:10 -0700 Subject: Don't infloop on null ranges Git-commit: faba04ef4f2b410257f76c1b9dc85e350929c4b9 Patch-mainline: yes References: bsc#1271166 CVE-2026-56289 Problem reported by Michał Majchrowicz. * src/patch.c (locate_hunk): Don't attempt to optimize matches of a null range. Instead, apply all the checks we apply to non-null ranges. --- src/patch.c | 3 --- 1 file changed, 3 deletions(-) --- a/src/patch.c +++ b/src/patch.c @@ -1152,9 +1152,6 @@ locate_hunk (lin fuzz) lin max_offset = MAX(max_pos_offset, max_neg_offset); lin min_offset; - if (!pat_lines) /* null range matches always */ - return first_guess; - /* Do not try lines <= 0. */ if (first_guess <= max_neg_offset) max_neg_offset = first_guess - 1;