diff options
| author | Jeff King <peff@peff.net> | 2010-10-18 14:39:17 -0400 |
|---|---|---|
| committer | Junio C Hamano <gitster@pobox.com> | 2010-10-29 14:13:33 -0700 |
| commit | 24305cd7009d682ba4115103c95844446a2bb305 (patch) | |
| tree | dee9960c98dde707d545b022dcb8c5d9d4b4ba50 /builtin | |
| parent | 87b50542a08ac6caa083ddc376e674424e37940a (diff) | |
| download | git-24305cd7009d682ba4115103c95844446a2bb305.tar.gz | |
apply: don't segfault on binary files with missing data
Usually when applying a binary diff generated without
--binary, it will be rejected early, as we don't even have
the full sha1 of the pre- and post-images.
However, if the diff is generated with --full-index (but not
--binary), then we will actually try to apply it. If we have
the postimage blob, then we can take a shortcut and never
even look at the binary diff at all (e.g., this can happen
when rebasing changes within a repository).
If we don't have the postimage blob, though, we try to look
at the actual fragments, of which there are none, and get a
segfault. This patch checks explicitly for that case and
complains to the user instead of segfaulting. We need to
keep the check at a low level so that the "shortcut" case
above continues to work.
We also add a test that demonstrates the segfault. While
we're at it, let's also explicitly test the shortcut case.
Reported-by: Rafaël Carré <rafael.carre@gmail.com>
Signed-off-by: Jeff King <peff@peff.net>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
Diffstat (limited to 'builtin')
| -rw-r--r-- | builtin/apply.c | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/builtin/apply.c b/builtin/apply.c index 23c18c573b..f051e66dcc 100644 --- a/builtin/apply.c +++ b/builtin/apply.c @@ -2645,6 +2645,12 @@ static int apply_binary_fragment(struct image *img, struct patch *patch) unsigned long len; void *dst; + if (!fragment) + return error("missing binary patch data for '%s'", + patch->new_name ? + patch->new_name : + patch->old_name); + /* Binary patch is irreversible without the optional second hunk */ if (apply_in_reverse) { if (!fragment->next) |