From 4e3250b7fb806f3e391239d680638ee44068ffe1 Mon Sep 17 00:00:00 2001 From: Andrzej Hunt Date: Sun, 25 Jul 2021 15:08:23 +0200 Subject: diffcore-rename: move old_dir/new_dir definition to plug leak old_dir/new_dir are free()'d at the end of update_dir_rename_counts, however if we return early we'll never free those strings. Therefore we should move all new allocations after the possible early return, avoiding a leak. This seems like a fairly recent leak, that started happening since the early-return was added in: 1ad69eb0dc (diffcore-rename: compute dir_rename_counts in stages, 2021-02-27) LSAN output from t0022: Direct leak of 7 byte(s) in 1 object(s) allocated from: #0 0x486804 in strdup ../projects/compiler-rt/lib/asan/asan_interceptors.cpp:452:3 #1 0xa71e48 in xstrdup wrapper.c:29:14 #2 0x7db9c7 in update_dir_rename_counts diffcore-rename.c:464:12 #3 0x7db6ae in find_renames diffcore-rename.c:1062:3 #4 0x7d76c3 in diffcore_rename_extended diffcore-rename.c:1472:18 #5 0x7b4cfc in diffcore_std diff.c:6705:4 #6 0x855e46 in log_tree_diff_flush log-tree.c:846:2 #7 0x856574 in log_tree_diff log-tree.c:955:3 #8 0x856574 in log_tree_commit log-tree.c:986:10 #9 0x9a9c67 in print_commit_summary sequencer.c:1329:7 #10 0x52e623 in cmd_commit builtin/commit.c:1862:3 #11 0x4ce83e in run_builtin git.c:475:11 #12 0x4ccafe in handle_builtin git.c:729:3 #13 0x4cb01c in run_argv git.c:818:4 #14 0x4cb01c in cmd_main git.c:949:19 #15 0x6b3f3d in main common-main.c:52:11 #16 0x7fe397c7a349 in __libc_start_main (/lib64/libc.so.6+0x24349) Direct leak of 7 byte(s) in 1 object(s) allocated from: #0 0x486804 in strdup ../projects/compiler-rt/lib/asan/asan_interceptors.cpp:452:3 #1 0xa71e48 in xstrdup wrapper.c:29:14 #2 0x7db9bc in update_dir_rename_counts diffcore-rename.c:463:12 #3 0x7db6ae in find_renames diffcore-rename.c:1062:3 #4 0x7d76c3 in diffcore_rename_extended diffcore-rename.c:1472:18 #5 0x7b4cfc in diffcore_std diff.c:6705:4 #6 0x855e46 in log_tree_diff_flush log-tree.c:846:2 #7 0x856574 in log_tree_diff log-tree.c:955:3 #8 0x856574 in log_tree_commit log-tree.c:986:10 #9 0x9a9c67 in print_commit_summary sequencer.c:1329:7 #10 0x52e623 in cmd_commit builtin/commit.c:1862:3 #11 0x4ce83e in run_builtin git.c:475:11 #12 0x4ccafe in handle_builtin git.c:729:3 #13 0x4cb01c in run_argv git.c:818:4 #14 0x4cb01c in cmd_main git.c:949:19 #15 0x6b3f3d in main common-main.c:52:11 #16 0x7fe397c7a349 in __libc_start_main (/lib64/libc.so.6+0x24349) SUMMARY: AddressSanitizer: 14 byte(s) leaked in 2 allocation(s). Signed-off-by: Andrzej Hunt Signed-off-by: Junio C Hamano --- diffcore-rename.c | 10 +++++++--- 1 file changed, 7 insertions(+), 3 deletions(-) (limited to 'diffcore-rename.c') diff --git a/diffcore-rename.c b/diffcore-rename.c index 4ef0459cfb..15b4add556 100644 --- a/diffcore-rename.c +++ b/diffcore-rename.c @@ -448,9 +448,9 @@ static void update_dir_rename_counts(struct dir_rename_info *info, const char *oldname, const char *newname) { - char *old_dir = xstrdup(oldname); - char *new_dir = xstrdup(newname); - char new_dir_first_char = new_dir[0]; + char *old_dir; + char *new_dir; + const char new_dir_first_char = newname[0]; int first_time_in_loop = 1; if (!info->setup) @@ -475,6 +475,10 @@ static void update_dir_rename_counts(struct dir_rename_info *info, */ return; + + old_dir = xstrdup(oldname); + new_dir = xstrdup(newname); + while (1) { int drd_flag = NOT_RELEVANT; -- cgit v1.2.3