[PATCH] send-pack: segfault fix on forced push
- From
Junio C Hamano <gitster@pobox.com>
- Date
- Nov 8, 2007, 09:38 UTC
- Message-ID
- <7vsl3h2i2j.fsf@gitster.siamese.dyndns.org>
When pushing to overwrite a ref that points at a commit we do not even have, the recent "terse push" patch tried to get a unique abbreviation for the non-existent (from our point of view) object, which resulted in strcpy(buf, NULL) and segfaulted.
Signed-off-by: Junio C Hamano <gitster@pobox.com> --- builtin-send-pack.c | 5 +++-- t/t5405-send-pack-rewind.sh | 42 ++++++++++++++++++++++++++++++++++++++++++ 2 files changed, 45 insertions(+), 2 deletions(-)
diff --git a/builtin-send-pack.c b/builtin-send-pack.c index c1fd3f5..5a0f5c6 100644 --- a/builtin-send-pack.c +++ b/builtin-send-pack.c @@ -365,8 +365,9 @@ static int do_send_pack(int in, int out, struct remote *remote, const char *dest char quickref[83]; char type = ' '; const char *msg = ""; - - strcpy(quickref, find_unique_abbrev(ref->old_sha1, DEFAULT_ABBREV)); + const char *old_abb; + old_abb = find_unique_abbrev(ref->old_sha1, DEFAULT_ABBREV); + strcpy(quickref, old_abb ? old_abb : old_hex); if (ref_newer(ref->peer_ref->new_sha1, ref->old_sha1)) strcat(quickref, ".."); else { diff --git a/t/t5405-send-pack-rewind.sh b/t/t5405-send-pack-rewind.sh new file mode 100755 index 0000000..86abc62 --- /dev/null +++ b/t/t5405-send-pack-rewind.sh @@ -0,0 +1,42 @@ +#!/bin/sh + +test_description='forced push to replace commit we do not have' + +. ./test-lib.sh + +test_expect_success setup ' + + >file1 && git add file1 && test_tick && + git commit -m Initial && + + mkdir another && ( + cd another && + git init && + git fetch .. master:master + ) && + + >file2 && git add file2 && test_tick && + git commit -m Second + +' + +test_expect_success 'non forced push should die not segfault' ' + + ( + cd another && + git push .. master:master + test $? = 1 + ) + +' + +test_expect_success 'forced push should succeed' ' + + ( + cd another && + git push .. +master:master + ) + +' + +test_done