From: "Andrzej Hunt via GitGitGadget" <gitgitgadget@gmail.com>
To: git@vger.kernel.org
Cc: Andrzej Hunt <andrzej@ahunt.org>, Andrzej Hunt <ajrhunt@google.com>
Subject: [PATCH v2 2/9] reset: free instead of leaking unneeded ref
Date: Sun, 14 Mar 2021 18:47:35 +0000 [thread overview]
Message-ID: <da05fc72b77a7c5394643ec7e9fc69e9d5c17fa5.1615747662.git.gitgitgadget@gmail.com> (raw)
In-Reply-To: <pull.899.v2.git.1615747662.gitgitgadget@gmail.com>
From: Andrzej Hunt <ajrhunt@google.com>
dwim_ref() allocs a new string into ref. Instead of setting to NULL to
discard it, we can FREE_AND_NULL.
This leak appears to have been introduced in:
4cf76f6bbf (builtin/reset: compute checkout metadata for reset, 2020-03-16)
This leak was found when running t0001 with LSAN, see also LSAN output below:
Direct leak of 5 byte(s) in 1 object(s) allocated from:
#0 0x486514 in strdup /home/abuild/rpmbuild/BUILD/llvm-11.0.0.src/build/../projects/compiler-rt/lib/asan/asan_interceptors.cpp:452:3
#1 0x9a7108 in xstrdup /home/ahunt/oss-fuzz/git/wrapper.c:29:14
#2 0x8add6b in expand_ref /home/ahunt/oss-fuzz/git/refs.c:670:12
#3 0x8ad777 in repo_dwim_ref /home/ahunt/oss-fuzz/git/refs.c:644:22
#4 0x6394af in dwim_ref /home/ahunt/oss-fuzz/git/./refs.h:162:9
#5 0x637e5c in cmd_reset /home/ahunt/oss-fuzz/git/builtin/reset.c:426:4
#6 0x4cd60d in run_builtin /home/ahunt/oss-fuzz/git/git.c:453:11
#7 0x4cb2da in handle_builtin /home/ahunt/oss-fuzz/git/git.c:704:3
#8 0x4ccc37 in run_argv /home/ahunt/oss-fuzz/git/git.c:771:4
#9 0x4cac29 in cmd_main /home/ahunt/oss-fuzz/git/git.c:902:19
#10 0x69c5ce in main /home/ahunt/oss-fuzz/git/common-main.c:52:11
#11 0x7f57ebb9d349 in __libc_start_main (/lib64/libc.so.6+0x24349)
Signed-off-by: Andrzej Hunt <ajrhunt@google.com>
---
builtin/reset.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/builtin/reset.c b/builtin/reset.c
index c635b062c3a7..43e855cb8876 100644
--- a/builtin/reset.c
+++ b/builtin/reset.c
@@ -425,7 +425,7 @@ int cmd_reset(int argc, const char **argv, const char *prefix)
dwim_ref(rev, strlen(rev), &dummy, &ref, 0);
if (ref && !starts_with(ref, "refs/"))
- ref = NULL;
+ FREE_AND_NULL(ref);
err = reset_index(ref, &oid, reset_type, quiet);
if (reset_type == KEEP && !err)
--
gitgitgadget
next prev parent reply other threads:[~2021-03-14 18:48 UTC|newest]
Thread overview: 52+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-03-08 18:36 [PATCH 0/7] Fix all leaks in t0001 Andrzej Hunt via GitGitGadget
2021-03-08 18:36 ` [PATCH 1/7] symbolic-ref: don't leak shortened refname in check_symref() Andrzej Hunt via GitGitGadget
2021-03-08 19:01 ` Jeff King
2021-03-14 18:07 ` Andrzej Hunt
2021-03-08 18:36 ` [PATCH 2/7] reset: free instead of leaking unneeded ref Andrzej Hunt via GitGitGadget
2021-03-08 19:03 ` Jeff King
2021-03-08 18:36 ` [PATCH 3/7] clone: free or UNLEAK further pointers when finished Andrzej Hunt via GitGitGadget
2021-03-08 19:12 ` Jeff King
2021-03-14 16:56 ` Andrzej Hunt
2021-03-08 18:36 ` [PATCH 4/7] worktree: fix leak in dwim_branch() Andrzej Hunt via GitGitGadget
2021-03-08 19:16 ` Jeff King
2021-03-14 17:56 ` Andrzej Hunt
2021-03-08 18:36 ` [PATCH 5/7] init: remove git_init_db_config() while fixing leaks Andrzej Hunt via GitGitGadget
2021-03-08 19:29 ` Jeff King
2021-03-08 18:36 ` [PATCH 6/7] init-db: silence template_dir leak when converting to absolute path Andrzej Hunt via GitGitGadget
2021-03-08 19:30 ` Jeff King
2021-03-08 18:36 ` [PATCH 7/7] parse-options: don't leak alias help messages Andrzej Hunt via GitGitGadget
2021-03-08 19:46 ` Jeff King
2021-03-14 17:03 ` Andrzej Hunt
2021-03-08 18:55 ` [PATCH 0/7] Fix all leaks in t0001 Jeff King
2021-03-12 23:42 ` Junio C Hamano
2021-03-14 16:54 ` Andrzej Hunt
2021-03-15 16:23 ` Andrzej Hunt
2021-03-08 18:57 ` Junio C Hamano
2021-03-14 16:55 ` Andrzej Hunt
2021-03-14 18:47 ` [PATCH v2 0/9] " Andrzej Hunt via GitGitGadget
2021-03-14 18:47 ` [PATCH v2 1/9] symbolic-ref: don't leak shortened refname in check_symref() Andrzej Hunt via GitGitGadget
2021-03-14 18:47 ` Andrzej Hunt via GitGitGadget [this message]
2021-03-14 18:47 ` [PATCH v2 3/9] clone: free or UNLEAK further pointers when finished Andrzej Hunt via GitGitGadget
2021-03-14 18:47 ` [PATCH v2 4/9] worktree: fix leak in dwim_branch() Andrzej Hunt via GitGitGadget
2021-03-14 18:47 ` [PATCH v2 5/9] init: remove git_init_db_config() while fixing leaks Andrzej Hunt via GitGitGadget
2021-03-14 18:47 ` [PATCH v2 6/9] init-db: silence template_dir leak when converting to absolute path Andrzej Hunt via GitGitGadget
2021-03-14 18:47 ` [PATCH v2 7/9] parse-options: convert bitfield values to use binary shift Andrzej Hunt via GitGitGadget
2021-03-14 20:25 ` Martin Ågren
2021-03-14 22:57 ` Junio C Hamano
2021-03-15 16:20 ` Andrzej Hunt
2021-03-14 18:47 ` [PATCH v2 8/9] parse-options: don't leak alias help messages Andrzej Hunt via GitGitGadget
2021-03-14 19:48 ` Eric Sunshine
2021-03-15 16:20 ` Andrzej Hunt
2021-03-14 20:00 ` Andrzej Hunt
2021-03-14 18:47 ` [PATCH v2 9/9] transport: also free remote_refs in transport_disconnect() Andrzej Hunt via GitGitGadget
2021-03-21 16:58 ` [PATCH v3 0/9] Fix all leaks in t0001 Andrzej Hunt via GitGitGadget
2021-03-21 16:58 ` [PATCH v3 1/9] symbolic-ref: don't leak shortened refname in check_symref() Andrzej Hunt via GitGitGadget
2021-03-21 16:58 ` [PATCH v3 2/9] reset: free instead of leaking unneeded ref Andrzej Hunt via GitGitGadget
2021-03-21 16:58 ` [PATCH v3 3/9] clone: free or UNLEAK further pointers when finished Andrzej Hunt via GitGitGadget
2021-03-21 16:58 ` [PATCH v3 4/9] worktree: fix leak in dwim_branch() Andrzej Hunt via GitGitGadget
2021-03-21 16:58 ` [PATCH v3 5/9] init: remove git_init_db_config() while fixing leaks Andrzej Hunt via GitGitGadget
2021-03-21 16:58 ` [PATCH v3 6/9] init-db: silence template_dir leak when converting to absolute path Andrzej Hunt via GitGitGadget
2021-03-21 16:58 ` [PATCH v3 7/9] parse-options: convert bitfield values to use binary shift Andrzej Hunt via GitGitGadget
2021-03-21 16:58 ` [PATCH v3 8/9] parse-options: don't leak alias help messages Andrzej Hunt via GitGitGadget
2021-03-21 16:58 ` [PATCH v3 9/9] transport: also free remote_refs in transport_disconnect() Andrzej Hunt via GitGitGadget
2021-03-21 21:40 ` [PATCH v3 0/9] Fix all leaks in t0001 Junio C Hamano
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