[PATCH v2 13/24] builtin/rev-parse: fix memory leak with `--parseopt`
- From
Patrick Steinhardt <ps@pks.im>
- Date
- Aug 1, 2024, 10:40 UTC
- Message-ID
- <034c416d4693701cecc3201b9f8d9839fd99c1ab.1722499961.git.ps@pks.im>
- In-Reply-To
- <cover.1722499961.git.ps@pks.im>
The `--parseopt` mode allows shell scripts to have the same option parsing mode as we have in C builtins. It soaks up a set of option descriptions via stdin and massages them into proper `struct option`s that we can then use to parse a set of arguments.
We only partially free those options when done though, creating a memory leak. Interestingly, we only end up free'ing the first option's help, which is of course wrong.
Fix this by freeing all option's help fields as well as their `argh` fields to plug this memory leak.
Signed-off-by: Patrick Steinhardt <ps@pks.im> --- builtin/rev-parse.c | 5 ++++- t/t1502-rev-parse-parseopt.sh | 2 ++ 2 files changed, 6 insertions(+), 1 deletion(-)
diff --git a/builtin/rev-parse.c b/builtin/rev-parse.c index 2e64f5bda7..5845d3f59b 100644 --- a/builtin/rev-parse.c +++ b/builtin/rev-parse.c @@ -553,7 +553,10 @@ static int cmd_parseopt(int argc, const char **argv, const char *prefix) strbuf_release(&sb); strvec_clear(&longnames); strvec_clear(&usage); - free((char *) opts->help); + for (size_t i = 0; i < opts_nr; i++) { + free((char *) opts[i].help); + free((char *) opts[i].argh); + } free(opts); return 0; } diff --git a/t/t1502-rev-parse-parseopt.sh b/t/t1502-rev-parse-parseopt.sh index b754b9fd74..5eaa6428c4 100755 --- a/t/t1502-rev-parse-parseopt.sh +++ b/t/t1502-rev-parse-parseopt.sh @@ -1,6 +1,8 @@ #!/bin/sh test_description='test git rev-parse --parseopt' + +TEST_PASSES_SANITIZE_LEAK=true . ./test-lib.sh check_invalid_long_option () {
-- 2.46.0.dirty