Fix two memory leaks in "struct rev_info" by freeing that memory in cmd_format_patch(). These two are unusual special-cases in being in the "struct rev_info", but not being "owned" by the code in revision.c. I.e. they're members of the struct so that this code in "builtin/log.c" can conveniently pass information code in "log-tree.c". See e.g. the make_cover_letter() caller of log_write_email_headers() here in "builtin/log.c", and [1] for a demonstration of where the "extra_headers" and "ref_message_ids" struct members are used. See 20ff06805c6 (format-patch: resurrect extra headers from config, 2006-06-02) and d1566f7883f (git-format-patch: Make the second and subsequent mails replies to the first, 2006-07-14) for the initial introduction of "extra_headers" and "ref_message_ids". We can count on repo_init_revisions() memset()-ing this data to 0 however, so we can count on it being either NULL or something we allocated. In the case of "extra_headers" let's add a local "char *" variable to hold it, to avoid the eventual cast from "const char *" when we free() it. 1. https://lore.kernel.org/git/220401.868rsoogxf.gmgdl@xxxxxxxxxxxxxxxxxxx/ Signed-off-by: Ævar Arnfjörð Bjarmason <avarab@xxxxxxxxx> --- builtin/log.c | 7 ++++++- 1 file changed, 6 insertions(+), 1 deletion(-) diff --git a/builtin/log.c b/builtin/log.c index 634dc782cce..6f9928fabfe 100644 --- a/builtin/log.c +++ b/builtin/log.c @@ -1747,6 +1747,7 @@ int cmd_format_patch(int argc, const char **argv, const char *prefix) struct commit *commit; struct commit **list = NULL; struct rev_info rev; + char *to_free = NULL; struct setup_revision_opt s_r_opt; int nr = 0, total, i; int use_stdout = 0; @@ -1947,7 +1948,7 @@ int cmd_format_patch(int argc, const char **argv, const char *prefix) strbuf_addch(&buf, '\n'); } - rev.extra_headers = strbuf_detach(&buf, NULL); + rev.extra_headers = to_free = strbuf_detach(&buf, NULL); if (from) { if (split_ident_line(&rev.from_ident, from, strlen(from))) @@ -2284,6 +2285,10 @@ int cmd_format_patch(int argc, const char **argv, const char *prefix) strbuf_release(&rdiff1); strbuf_release(&rdiff2); strbuf_release(&rdiff_title); + free(to_free); + if (rev.ref_message_ids) + string_list_clear(rev.ref_message_ids, 0); + free(rev.ref_message_ids); UNLEAK(rev); return 0; } -- 2.36.0.rc2.843.g193535c2aa7
