tjh.dev
1From fa7438a0ff4033e4741c807394a9af6207940d71 Mon Sep 17 00:00:00 2001
2From: Joerg Sonnenberger <joerg@bec.de>
3Date: Tue, 5 Sep 2017 18:12:19 +0200
4Subject: [PATCH] Do something sensible for empty strings to make fuzzers
5 happy.
6
7---
8 libarchive/archive_read_support_format_xar.c | 8 +++++++-
9 1 file changed, 7 insertions(+), 1 deletion(-)
10
11diff --git a/libarchive/archive_read_support_format_xar.c b/libarchive/archive_read_support_format_xar.c
12index 7a22beb9d..93eeacc5e 100644
13--- a/libarchive/archive_read_support_format_xar.c
14+++ b/libarchive/archive_read_support_format_xar.c
15@@ -1040,6 +1040,9 @@ atol10(const char *p, size_t char_cnt)
16 uint64_t l;
17 int digit;
18
19+ if (char_cnt == 0)
20+ return (0);
21+
22 l = 0;
23 digit = *p - '0';
24 while (digit >= 0 && digit < 10 && char_cnt-- > 0) {
25@@ -1054,7 +1057,10 @@ atol8(const char *p, size_t char_cnt)
26 {
27 int64_t l;
28 int digit;
29-
30+
31+ if (char_cnt == 0)
32+ return (0);
33+
34 l = 0;
35 while (char_cnt-- > 0) {
36 if (*p >= '0' && *p <= '7')