On 2021-02-11 00:53, Steven Rostedt wrote:
On Wed, 10 Feb 2021 11:48:23 -0500
Steven Rostedt <rostedt@xxxxxxxxxxx> wrote:
On Wed, 10 Feb 2021 11:30:26 -0500
Steven Rostedt <rostedt@xxxxxxxxxxx> wrote:
> Can you test this patch?
v2:
Bah!
v3:
diff --git a/kernel/trace/trace.c b/kernel/trace/trace.c
index b79bcacdd6f9..90d7ade03499 100644
--- a/kernel/trace/trace.c
+++ b/kernel/trace/trace.c
@@ -2739,7 +2739,7 @@ trace_event_buffer_lock_reserve(struct
trace_buffer **current_rb,
(entry = this_cpu_read(trace_buffered_event))) {
/* Try to use the per cpu buffer first */
val = this_cpu_inc_return(trace_buffered_event_cnt);
- if (val == 1) {
+ if ((len < (PAGE_SIZE - sizeof(*entry))) && val == 1) {
trace_event_setup(entry, type, trace_ctx);
entry->array[0] = len;
return entry;
After apply this
patch(https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/kernel/trace/trace.c?id=b220c049d5196dd94d992dd2dc8cba1a5e6123bf).
It not crash again on my v4.19 kernel.
