[PATCH] Fix strcat() on uninitialized memory
From: Johannes Schindelin <hidden>
Date: 2016-06-15 22:48:58
Subsystem:
the rest · Maintainer:
Linus Torvalds
Under certain circumstances, this bug would trigger a buffer overflow error with libc, and fail test 5516. Strbufs would have avoided the issue. Signed-off-by: Johannes Schindelin <redacted> --- builtin/receive-pack.c | 4 ++-- 1 files changed, 2 insertions(+), 2 deletions(-)
diff --git a/builtin/receive-pack.c b/builtin/receive-pack.c
index 05071c3..1644424 100644
--- a/builtin/receive-pack.c
+++ b/builtin/receive-pack.c@@ -569,9 +569,9 @@ static void check_aliased_update(struct command *cmd, struct string_list *list) dst_cmd->skip_update = 1; strcpy(cmd_oldh, find_unique_abbrev(cmd->old_sha1, DEFAULT_ABBREV)); - strcat(cmd_newh, find_unique_abbrev(cmd->new_sha1, DEFAULT_ABBREV)); + strcpy(cmd_newh, find_unique_abbrev(cmd->new_sha1, DEFAULT_ABBREV)); strcpy(dst_oldh, find_unique_abbrev(dst_cmd->old_sha1, DEFAULT_ABBREV)); - strcat(dst_newh, find_unique_abbrev(dst_cmd->new_sha1, DEFAULT_ABBREV)); + strcpy(dst_newh, find_unique_abbrev(dst_cmd->new_sha1, DEFAULT_ABBREV)); rp_error("refusing inconsistent update between symref '%s' (%s..%s) and" " its target '%s' (%s..%s)", cmd->ref_name, cmd_oldh, cmd_newh,
--
1.7.1.msysgit.0.2.g2fefc8