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authorLinus Torvalds <torvalds@linux-foundation.org>2021-09-19 13:22:40 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2021-09-19 13:22:40 -0700
commitfec3036200b7d9df32c94eb2616447eb2f6e09ac (patch)
treea2a5221b4a303bc0dbdf574d34c4b84fca82f08b /kernel
parentf5e29a26c42b2c1b149118319a03bf937f168298 (diff)
parentb89a05b21f46150ac10a962aa50109250b56b03b (diff)
downloadlwn-fec3036200b7d9df32c94eb2616447eb2f6e09ac.tar.gz
lwn-fec3036200b7d9df32c94eb2616447eb2f6e09ac.zip
Merge tag 'perf-urgent-2021-09-19' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull perf event fix from Thomas Gleixner: "A single fix for the perf core where a value read with READ_ONCE() was checked and then reread which makes all the checks invalid. Reuse the already read value instead" * tag 'perf-urgent-2021-09-19' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: events: Reuse value read using READ_ONCE instead of re-reading it
Diffstat (limited to 'kernel')
-rw-r--r--kernel/events/core.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/kernel/events/core.c b/kernel/events/core.c
index 744e8726c5b2..0c000cb01eeb 100644
--- a/kernel/events/core.c
+++ b/kernel/events/core.c
@@ -10193,7 +10193,7 @@ static void perf_event_addr_filters_apply(struct perf_event *event)
return;
if (ifh->nr_file_filters) {
- mm = get_task_mm(event->ctx->task);
+ mm = get_task_mm(task);
if (!mm)
goto restart;