From: Andrzej Hunt <ajrhunt@xxxxxxxxxx>
common_prefix() returns a new string, which we store in max_prefix -
this string needs to be freed to avoid a leak. This leak is happening
in cmd_ls_files, hence is of no real consequence - an UNLEAK would be
just as good, but we might as well free the string properly.
Leak found while running t0002, see output below:
Direct leak of 8 byte(s) in 1 object(s) allocated from:
#0 0x49a85d in malloc /home/abuild/rpmbuild/BUILD/llvm-11.0.0.src/build/../projects/compiler-rt/lib/asan/asan_malloc_linux.cpp:145:3
#1 0x9ab1b4 in do_xmalloc wrapper.c:41:8
#2 0x9ab248 in do_xmallocz wrapper.c:75:8
#3 0x9ab22a in xmallocz wrapper.c:83:9
#4 0x9ab2d7 in xmemdupz wrapper.c:99:16
#5 0x78d6a4 in common_prefix dir.c:191:15
#6 0x5aca48 in cmd_ls_files builtin/ls-files.c:669:16
#7 0x4cd92d in run_builtin git.c:453:11
#8 0x4cb5fa in handle_builtin git.c:704:3
#9 0x4ccf57 in run_argv git.c:771:4
#10 0x4caf49 in cmd_main git.c:902:19
#11 0x69ce2e in main common-main.c:52:11
#12 0x7f64d4d94349 in __libc_start_main (/lib64/libc.so.6+0x24349)
Signed-off-by: Andrzej Hunt <ajrhunt@xxxxxxxxxx>
---
builtin/ls-files.c | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)
diff --git a/builtin/ls-files.c b/builtin/ls-files.c
index 60a2913a01e9..84448b360120 100644
--- a/builtin/ls-files.c
+++ b/builtin/ls-files.c
@@ -603,7 +603,7 @@ static int option_parse_exclude_standard(const struct option *opt,
int cmd_ls_files(int argc, const char **argv, const char *cmd_prefix)
{
int require_work_tree = 0, show_tag = 0, i;
- const char *max_prefix;
+ char *max_prefix;
struct dir_struct dir;
struct pattern_list *pl;
struct string_list exclude_list = STRING_LIST_INIT_NODUP;
@@ -781,5 +781,6 @@ int cmd_ls_files(int argc, const char **argv, const char *cmd_prefix)
}
dir_clear(&dir);
+ free(max_prefix);
return 0;
}
--
gitgitgadget
