On Sun, Jun 20, 2021 at 8:15 AM <andrzej@xxxxxxxxx> wrote: > > From: Andrzej Hunt <ajrhunt@xxxxxxxxxx> > > merge_name() calls dwim_ref(), which allocates a new string into > found_ref. Therefore add a free() to avoid leaking found_ref. > > LSAN output from t0021: > > Direct leak of 16 byte(s) in 1 object(s) allocated from: > #0 0x486804 in strdup ../projects/compiler-rt/lib/asan/asan_interceptors.cpp:452:3 > #1 0xa8beb8 in xstrdup wrapper.c:29:14 > #2 0x954054 in expand_ref refs.c:671:12 > #3 0x953cb6 in repo_dwim_ref refs.c:644:22 > #4 0x5d3759 in dwim_ref refs.h:162:9 > #5 0x5d3759 in merge_name builtin/merge.c:517:6 > #6 0x5d3759 in collect_parents builtin/merge.c:1214:5 > #7 0x5cf60d in cmd_merge builtin/merge.c:1458:16 > #8 0x4ce83e in run_builtin git.c:475:11 > #9 0x4ccafe in handle_builtin git.c:729:3 > #10 0x4cb01c in run_argv git.c:818:4 > #11 0x4cb01c in cmd_main git.c:949:19 > #12 0x6bdbfd in main common-main.c:52:11 > #13 0x7f0430502349 in __libc_start_main (/lib64/libc.so.6+0x24349) > > SUMMARY: AddressSanitizer: 16 byte(s) leaked in 1 allocation(s). > > Signed-off-by: Andrzej Hunt <andrzej@xxxxxxxxx> > --- > builtin/merge.c | 3 ++- > 1 file changed, 2 insertions(+), 1 deletion(-) > > diff --git a/builtin/merge.c b/builtin/merge.c > index a8a843b1f5..7ad85c044a 100644 > --- a/builtin/merge.c > +++ b/builtin/merge.c > @@ -503,7 +503,7 @@ static void merge_name(const char *remote, struct strbuf *msg) > struct strbuf bname = STRBUF_INIT; > struct merge_remote_desc *desc; > const char *ptr; > - char *found_ref; > + char *found_ref = NULL; > int len, early; > > strbuf_branchname(&bname, remote, 0); > @@ -586,6 +586,7 @@ static void merge_name(const char *remote, struct strbuf *msg) > strbuf_addf(msg, "%s\t\tcommit '%s'\n", > oid_to_hex(&remote_head->object.oid), remote); > cleanup: > + free(found_ref); > strbuf_release(&buf); > strbuf_release(&bname); > } > -- > 2.26.2 Makes sense, and a quick grep through the code doesn't suggest any other obvious leaks from using dwim_ref().
