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| author |  Jeff King <peff@peff.net> | 2019-09-05 18:50:31 -0400 |
|---|---|---|
| committer |  Junio C Hamano <gitster@pobox.com> | 2019-09-06 11:03:39 -0700 |
| commit | 0dfed92dfdb95c2f12df7299bb1e606d79185626 (patch) | |
| tree | 887916975d1fd4e4897e8eb26133532c77451ad3 | |
| parent | First batch after Git 2.23 (diff) | |
| download | tgif-0dfed92dfdb95c2f12df7299bb1e606d79185626.tar.xz | |
git-am: handle missing "author" when parsing commit
We try to parse the "author" line out of a commit buffer. We handle the
case that split_ident_line() doesn't work, but we don't do any error
checking that we found an "author" line in the first place! This would
cause us to segfault on such a corrupt object.
Let's put in an explicit NULL check (we can just die(), which is what a
bogus split would do, too). As a bonus, this silences a warning when
compiling with gcc 9.2.1 using "-flto -O3", which claims that ident_len
may be uninitialized (it would only be if we had a NULL here).
Reported-by: Stephan Beyer <s-beyer@gmx.net>
Helped-by: René Scharfe <l.s.r@web.de>
Signed-off-by: Jeff King <peff@peff.net>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
| -rw-r--r-- | builtin/am.c | 4 |
1 files changed, 3 insertions, 1 deletions
diff --git a/builtin/am.c b/builtin/am.c index 1aea657a7f..ee7305eaa6 100644 --- a/builtin/am.c +++ b/builtin/am.c @@ -1272,7 +1272,9 @@ static void get_commit_info(struct am_state *state, struct commit *commit) buffer = logmsg_reencode(commit, NULL, get_commit_output_encoding()); ident_line = find_commit_header(buffer, "author", &ident_len); - + if (!ident_line) + die(_("missing author line in commit %s"), + oid_to_hex(&commit->object.oid)); if (split_ident_line(&id, ident_line, ident_len) < 0) die(_("invalid ident line: %.*s"), (int)ident_len, ident_line); |