From 8d833e933719cd4badb7ec7d042d6f7cc206247d Mon Sep 17 00:00:00 2001 From: Andrzej Hunt Date: Sun, 25 Jul 2021 15:08:25 +0200 Subject: [PATCH] read-cache: call diff_setup_done to avoid leak repo_diff_setup() calls through to diff.c's static prep_parse_options(), which in turn allocates a new array into diff_opts.parseopts. diff_setup_done() is responsible for freeing that array, and has the benefit of verifying diff_opts too - hence we add a call to diff_setup_done() to avoid leaking parseopts. Output from the leak as found while running t0090 with LSAN: Direct leak of 7120 byte(s) in 1 object(s) allocated from: #0 0x49a82d in malloc ../projects/compiler-rt/lib/asan/asan_malloc_linux.cpp:145:3 #1 0xa8bf89 in do_xmalloc wrapper.c:41:8 #2 0x7a7bae in prep_parse_options diff.c:5636:2 #3 0x7a7bae in repo_diff_setup diff.c:4611:2 #4 0x93716c in repo_index_has_changes read-cache.c:2518:3 #5 0x872233 in unclean merge-ort-wrappers.c:12:14 #6 0x872233 in merge_ort_recursive merge-ort-wrappers.c:53:6 #7 0x5d5b11 in try_merge_strategy builtin/merge.c:752:12 #8 0x5d0b6b in cmd_merge builtin/merge.c:1666:9 #9 0x4ce83e in run_builtin git.c:475:11 #10 0x4ccafe in handle_builtin git.c:729:3 #11 0x4cb01c in run_argv git.c:818:4 #12 0x4cb01c in cmd_main git.c:949:19 #13 0x6bdc2d in main common-main.c:52:11 #14 0x7f551eb51349 in __libc_start_main (/lib64/libc.so.6+0x24349) SUMMARY: AddressSanitizer: 7120 byte(s) leaked in 1 allocation(s) Signed-off-by: Andrzej Hunt Signed-off-by: Junio C Hamano --- read-cache.c | 1 + 1 file changed, 1 insertion(+) diff --git a/read-cache.c b/read-cache.c index ba2b012a6c..6030015846 100644 --- a/read-cache.c +++ b/read-cache.c @@ -2499,6 +2499,7 @@ int repo_index_has_changes(struct repository *repo, opt.flags.exit_with_status = 1; if (!sb) opt.flags.quick = 1; + diff_setup_done(&opt); do_diff_cache(&cmp, &opt); diffcore_std(&opt); for (i = 0; sb && i < diff_queued_diff.nr; i++) { -- 2.11.4.GIT