diff options
| author | Andrzej Hunt <ajrhunt@google.com> | 2021-03-14 21:47:34 +0300 |
|---|---|---|
| committer | Junio C Hamano <gitster@pobox.com> | 2021-03-15 01:57:59 +0300 |
| commit | f63b88867a8f87d7f8442b2dc2deb38c720449bc (patch) | |
| tree | fc79b1aa2cf2ca4b65af6a80e25042e138fff5c7 /builtin/symbolic-ref.c | |
| parent | be7935ed8bff19f481b033d0d242c5d5f239ed50 (diff) | |
symbolic-ref: don't leak shortened refname in check_symref()
shorten_unambiguous_ref() returns an allocated string. We have to
track it separately from the const refname.
This leak has existed since:
9ab55daa55 (git symbolic-ref --delete $symref, 2012-10-21)
This leak was found when running t0001 with LSAN, see also LSAN output
below:
Direct leak of 19 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 0x9ab048 in xstrdup /home/ahunt/oss-fuzz/git/wrapper.c:29:14
#2 0x8b452f in refs_shorten_unambiguous_ref /home/ahunt/oss-fuzz/git/refs.c
#3 0x8b47e8 in shorten_unambiguous_ref /home/ahunt/oss-fuzz/git/refs.c:1287:9
#4 0x679fce in check_symref /home/ahunt/oss-fuzz/git/builtin/symbolic-ref.c:28:14
#5 0x679ad8 in cmd_symbolic_ref /home/ahunt/oss-fuzz/git/builtin/symbolic-ref.c:70:9
#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 0x69cc6e in main /home/ahunt/oss-fuzz/git/common-main.c:52:11
#11 0x7f98388a4349 in __libc_start_main (/lib64/libc.so.6+0x24349)
Signed-off-by: Andrzej Hunt <ajrhunt@google.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
Diffstat (limited to 'builtin/symbolic-ref.c')
| -rw-r--r-- | builtin/symbolic-ref.c | 4 |
1 files changed, 3 insertions, 1 deletions
diff --git a/builtin/symbolic-ref.c b/builtin/symbolic-ref.c index 80237f0df1..e547a08d6c 100644 --- a/builtin/symbolic-ref.c +++ b/builtin/symbolic-ref.c @@ -24,9 +24,11 @@ static int check_symref(const char *HEAD, int quiet, int shorten, int print) return 1; } if (print) { + char *to_free = NULL; if (shorten) - refname = shorten_unambiguous_ref(refname, 0); + refname = to_free = shorten_unambiguous_ref(refname, 0); puts(refname); + free(to_free); } return 0; } |