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Commit 0a3d7ce7 authored by Namhyung Kim's avatar Namhyung Kim Committed by Steven Rostedt
Browse files

tracing: Check return value of tracing_dentry_percpu() 

If tracing_dentry_percpu() failed, tracing_init_debugfs_percpu()
will try to create each cpu directories on debugfs' root directory
as d_percpu is NULL.

Link: http://lkml.kernel.org/r/1335143517-2285-1-git-send-email-namhyung.kim@lge.com



Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Ingo Molnar <mingo@redhat.com>
Signed-off-by: default avatarNamhyung Kim <namhyung.kim@lge.com>
Signed-off-by: default avatarSteven Rostedt <rostedt@goodmis.org>
parent 308f7eeb

kernel/trace/trace.c

+3 −0
Original line number Diff line number Diff line
@@ -4474,6 +4474,9 @@ static void tracing_init_debugfs_percpu(long cpu) 
	struct dentry *d_cpu;

	char cpu_dir[30]; /* 30 characters should be more than enough */



	if (!d_percpu)

		return;



	snprintf(cpu_dir, 30, "cpu%ld", cpu);

	d_cpu = debugfs_create_dir(cpu_dir, d_percpu);

	if (!d_cpu) {