When interpreting a config value, the config parser reads in 1+ space
character(s) and puts -one- space character in the buffer as soon as
the first non-space character is encountered (if not inside quotes).
Unfortunately the buffer size check lacks the extra space character
which gets inserted at the next non-space character, resulting in
a crash with a specially crafted config entry.
The unit test now uses Java to compile a platform independent
.NET framework to output the test string in C# :o) Read:
Thanks to Johannes Sixt for the correct printf call
which replaces the perl invocation.
Signed-off-by: Thomas Jarosch <thomas.jarosch@xxxxxxxxxxxxx>
---
config.c | 2 +-
t/t1303-wacky-config.sh | 9 ++++++++-
2 files changed, 9 insertions(+), 2 deletions(-)
diff --git a/config.c b/config.c
index b76fe4c..2d70398 100644
--- a/config.c
+++ b/config.c
@@ -51,7 +51,7 @@ static char *parse_value(void)
for (;;) {
int c = get_next_char();
- if (len >= sizeof(value))
+ if (len >= sizeof(value) - 1)
return NULL;
if (c == '\n') {
if (quote)
diff --git a/t/t1303-wacky-config.sh b/t/t1303-wacky-config.sh
index 1983076..a7d8d25 100755
--- a/t/t1303-wacky-config.sh
+++ b/t/t1303-wacky-config.sh
@@ -10,7 +10,7 @@ setup() {
check() {
echo "$2" >expected
- git config --get "$1" >actual
+ git config --get "$1" >actual 2>&1
test_cmp actual expected
}
@@ -40,4 +40,11 @@ test_expect_success 'make sure git config escapes section names properly' '
check "$SECTION" bar
'
+LONG_VALUE=$(printf "x%01021dx a" 7)
+test_expect_success 'do not crash on special long config line' '
+ setup &&
+ git config section.key "$LONG_VALUE" &&
+ check section.key "fatal: bad config file line 2 in .git/config"
+'
+
test_done
--
1.6.1.3
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