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A single fix for the perf core plugging a memory leak in the address filter

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parser.
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Merge tag 'perf-urgent-2020-11-08' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip

Pull perf fix from Thomas Gleixner:
 "A single fix for the perf core plugging a memory leak in the address
  filter parser"

* tag 'perf-urgent-2020-11-08' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  perf/core: Fix a memory leak in perf_event_parse_addr_filter()
This commit is contained in:
Linus Torvalds 2020-11-08 10:05:10 -08:00
commit 100e38914a
1 changed files with 5 additions and 7 deletions
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12
kernel/events/core.c
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@ -10085,6 +10085,7 @@ perf_event_parse_addr_filter(struct perf_event *event, char *fstr,
if (token == IF_SRC_FILE || token == IF_SRC_FILEADDR) {
int fpos = token == IF_SRC_FILE ? 2 : 1;
kfree(filename);
filename = match_strdup(&args[fpos]);
if (!filename) {
ret = -ENOMEM;
@ -10131,16 +10132,13 @@ perf_event_parse_addr_filter(struct perf_event *event, char *fstr,
*/
ret = -EOPNOTSUPP;
if (!event->ctx->task)
goto fail_free_name;
goto fail;
/* look up the path and grab its inode */
ret = kern_path(filename, LOOKUP_FOLLOW,
&filter->path);
if (ret)
goto fail_free_name;
kfree(filename);
filename = NULL;
goto fail;
ret = -EINVAL;
if (!filter->path.dentry ||
@ -10160,13 +10158,13 @@ perf_event_parse_addr_filter(struct perf_event *event, char *fstr,
if (state != IF_STATE_ACTION)
goto fail;
kfree(filename);
kfree(orig);
return 0;
fail_free_name:
kfree(filename);
fail:
kfree(filename);
free_filters_list(filters);
kfree(orig);