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Merge branch 'rs/name-rev-fix-free-after-use' into maint

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Regression fix for 2.36 where "git name-rev" started to sometimes
reference strings after they are freed.

This fixes a regression in 2.36 and is slate to go to 2.36.1
source: <340c8810-d912-7b18-d46e-a9d43f20216a@web.de>

* rs/name-rev-fix-free-after-use:
  Revert "name-rev: release unused name strings"
This commit is contained in:
Junio C Hamano 2022-05-05 14:36:24 -07:00
commit ee12682367
1 changed files with 5 additions and 16 deletions
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21
builtin/name-rev.c
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@ -18,7 +18,7 @@
#define CUTOFF_DATE_SLOP 86400
struct rev_name {
char *tip_name;
const char *tip_name;
timestamp_t taggerdate;
int generation;
int distance;
@ -84,7 +84,7 @@ static int commit_is_before_cutoff(struct commit *commit)
static int is_valid_rev_name(const struct rev_name *name)
{
return name && (name->generation || name->tip_name);
return name && name->tip_name;
}
static struct rev_name *get_commit_rev_name(const struct commit *commit)
@ -146,20 +146,9 @@ static struct rev_name *create_or_update_name(struct commit *commit,
{
struct rev_name *name = commit_rev_name_at(&rev_names, commit);
if (is_valid_rev_name(name)) {
if (!is_better_name(name, taggerdate, generation, distance, from_tag))
return NULL;
/*
* This string might still be shared with ancestors
* (generation > 0). We can release it here regardless,
* because the new name that has just won will be better
* for them as well, so name_rev() will replace these
* stale pointers when it processes the parents.
*/
if (!name->generation)
free(name->tip_name);
}
if (is_valid_rev_name(name) &&
!is_better_name(name, taggerdate, generation, distance, from_tag))
return NULL;
name->taggerdate = taggerdate;
name->generation = generation;