From 03a4e260e2bf4eebd7ea6658d24507fbf80f3ecd Mon Sep 17 00:00:00 2001 From: Johannes Schindelin Date: Fri, 21 Oct 2016 14:24:13 +0200 Subject: [PATCH] sequencer: plug memory leaks for the option values The sequencer is our attempt to lib-ify cherry-pick. Yet it behaves like a one-shot command when it reads its configuration: memory is allocated and released only when the command exits. This is kind of okay for git-cherry-pick, which *is* a one-shot command. All the work to make the sequencer its work horse was done to allow using the functionality as a library function, though, including proper clean-up after use. To remedy that, take custody of the option values in question, allocating and duping literal constants as needed and freeing them at end. Signed-off-by: Johannes Schindelin Signed-off-by: Junio C Hamano --- builtin/revert.c | 4 ++++ sequencer.c | 26 ++++++++++++++++++++++---- sequencer.h | 6 +++--- 3 files changed, 29 insertions(+), 7 deletions(-) diff --git a/builtin/revert.c b/builtin/revert.c index 7365559c97..ba5a88cbfd 100644 --- a/builtin/revert.c +++ b/builtin/revert.c @@ -174,6 +174,10 @@ static void parse_args(int argc, const char **argv, struct replay_opts *opts) if (argc > 1) usage_with_options(usage_str, options); + + /* These option values will be free()d */ + opts->gpg_sign = xstrdup_or_null(opts->gpg_sign); + opts->strategy = xstrdup_or_null(opts->strategy); } int cmd_revert(int argc, const char **argv, const char *prefix) diff --git a/sequencer.c b/sequencer.c index 8d272fbdca..04c55f2087 100644 --- a/sequencer.c +++ b/sequencer.c @@ -117,6 +117,13 @@ static int has_conforming_footer(struct strbuf *sb, struct strbuf *sob, static void remove_sequencer_state(const struct replay_opts *opts) { struct strbuf dir = STRBUF_INIT; + int i; + + free(opts->gpg_sign); + free(opts->strategy); + for (i = 0; i < opts->xopts_nr; i++) + free(opts->xopts[i]); + free(opts->xopts); strbuf_addf(&dir, "%s", get_dir(opts)); remove_dir_recursively(&dir, 0); @@ -280,7 +287,7 @@ static int do_recursive_merge(struct commit *base, struct commit *next, struct merge_options o; struct tree *result, *next_tree, *base_tree, *head_tree; int clean; - const char **xopt; + char **xopt; static struct lock_file index_lock; hold_locked_index(&index_lock, 1); @@ -583,7 +590,8 @@ static int do_pick_commit(struct commit *commit, struct replay_opts *opts) commit_list_insert(base, &common); commit_list_insert(next, &remotes); - res |= try_merge_command(opts->strategy, opts->xopts_nr, opts->xopts, + res |= try_merge_command(opts->strategy, + opts->xopts_nr, (const char **)opts->xopts, common, sha1_to_hex(head), remotes); free_commit_list(common); free_commit_list(remotes); @@ -783,6 +791,16 @@ static int read_populate_todo(struct commit_list **todo_list, return 0; } +static int git_config_string_dup(char **dest, + const char *var, const char *value) +{ + if (!value) + return config_error_nonbool(var); + free(*dest); + *dest = xstrdup(value); + return 0; +} + static int populate_opts_cb(const char *key, const char *value, void *data) { struct replay_opts *opts = data; @@ -803,9 +821,9 @@ static int populate_opts_cb(const char *key, const char *value, void *data) else if (!strcmp(key, "options.mainline")) opts->mainline = git_config_int(key, value); else if (!strcmp(key, "options.strategy")) - git_config_string(&opts->strategy, key, value); + git_config_string_dup(&opts->strategy, key, value); else if (!strcmp(key, "options.gpg-sign")) - git_config_string(&opts->gpg_sign, key, value); + git_config_string_dup(&opts->gpg_sign, key, value); else if (!strcmp(key, "options.strategy-option")) { ALLOC_GROW(opts->xopts, opts->xopts_nr + 1, opts->xopts_alloc); opts->xopts[opts->xopts_nr++] = xstrdup(value); diff --git a/sequencer.h b/sequencer.h index dd4d33a572..8453669765 100644 --- a/sequencer.h +++ b/sequencer.h @@ -34,11 +34,11 @@ struct replay_opts { int mainline; - const char *gpg_sign; + char *gpg_sign; /* Merge strategy */ - const char *strategy; - const char **xopts; + char *strategy; + char **xopts; size_t xopts_nr, xopts_alloc; /* Only used by REPLAY_NONE */ -- 2.39.2