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authorMathieu Desnoyers <mathieu.desnoyers@polymtl.ca>2008-11-14 17:47:42 -0500
committerIngo Molnar <mingo@elte.hu>2008-11-16 09:01:31 +0100
commitde0baf9ad661ac630a45a50ea1717cc4f4b33ace (patch)
tree71c95e555b053f1e03f0befaa457d312e23dc919 /kernel/tracepoint.c
parent2504ea5edfebb14133b8571c20785cdc077e07d2 (diff)
downloadvexpress-lsk-de0baf9ad661ac630a45a50ea1717cc4f4b33ace.tar.gz
tracepoints: fix disable
Impact: fix race Set the probe array pointer to NULL when the tracepoint is disabled. The probe array point not being NULL could generate a race condition where the reader would dereference a freed pointer. Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@polymtl.ca> Signed-off-by: Ingo Molnar <mingo@elte.hu>
Diffstat (limited to 'kernel/tracepoint.c')
-rw-r--r--kernel/tracepoint.c1
1 files changed, 1 insertions, 0 deletions
diff --git a/kernel/tracepoint.c b/kernel/tracepoint.c
index e96590f17de..47a7303d6cd 100644
--- a/kernel/tracepoint.c
+++ b/kernel/tracepoint.c
@@ -262,6 +262,7 @@ static void set_tracepoint(struct tracepoint_entry **entry,
static void disable_tracepoint(struct tracepoint *elem)
{
elem->state = 0;
+ rcu_assign_pointer(elem->funcs, NULL);
}
/**