Am 27.02.2017 um 23:18 schrieb René Scharfe:
> Am 27.02.2017 um 21:10 schrieb Junio C Hamano:
>> René Scharfe <l.s.r@xxxxxx> writes:
>>
>>> Would it make sense to mirror the previously existing condition and
>>> check for is_new instead? I.e.:
>>>
>>> if ((!patch->is_delete && !patch->new_name) ||
>>> (!patch->is_new && !patch->old_name)) {
>>>
>>
>> Yes, probably.
So let's actually do it!
-- >8 --
Subject: [PATCH] apply: check git diffs for missing old filenames
2c93286a (fix "git apply --index ..." not to deref NULL) added a check
for git patches missing a +++ line, preventing a segfault. Check for
missing --- lines as well, and add a test for each case.
Found by Vegard Nossum using AFL.
Original-patch-by: Vegard Nossum <vegard.nossum@xxxxxxxxxx>
Signed-off-by: Rene Scharfe <l.s.r@xxxxxx>
---
apply.c | 3 ++-
t/t4133-apply-filenames.sh | 24 ++++++++++++++++++++++++
2 files changed, 26 insertions(+), 1 deletion(-)
diff --git a/apply.c b/apply.c
index b963d7d8fb..8cd6435c74 100644
--- a/apply.c
+++ b/apply.c
@@ -1575,7 +1575,8 @@ static int find_header(struct apply_state *state,
patch->old_name = xstrdup(patch->def_name);
patch->new_name = xstrdup(patch->def_name);
}
- if (!patch->is_delete && !patch->new_name) {
+ if ((!patch->new_name && !patch->is_delete) ||
+ (!patch->old_name && !patch->is_new)) {
error(_("git diff header lacks filename information "
"(line %d)"), state->linenr);
return -128;
diff --git a/t/t4133-apply-filenames.sh b/t/t4133-apply-filenames.sh
index 2ecb4216b7..c5ed3b17c4 100755
--- a/t/t4133-apply-filenames.sh
+++ b/t/t4133-apply-filenames.sh
@@ -35,4 +35,28 @@ test_expect_success 'apply diff with inconsistent filenames in headers' '
test_i18ngrep "inconsistent old filename" err
'
+test_expect_success 'apply diff with new filename missing from headers' '
+ cat >missing_new_filename.diff <<-\EOF &&
+ diff --git a/f b/f
+ index 0000000..d00491f
+ --- a/f
+ @@ -0,0 +1 @@
+ +1
+ EOF
+ test_must_fail git apply missing_new_filename.diff 2>err &&
+ test_i18ngrep "lacks filename information" err
+'
+
+test_expect_success 'apply diff with old filename missing from headers' '
+ cat >missing_old_filename.diff <<-\EOF &&
+ diff --git a/f b/f
+ index d00491f..0000000
+ +++ b/f
+ @@ -1 +0,0 @@
+ -1
+ EOF
+ test_must_fail git apply missing_old_filename.diff 2>err &&
+ test_i18ngrep "lacks filename information" err
+'
+
test_done
--
2.13.2
