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authorSteven Rostedt (Google)2022-01-25 10:44:08 -0500
committerChuck Lever2022-02-28 10:26:38 -0500
commitc6ced22997ad56a05377221bded7bb30973a62f2 (patch)
tree14bb8e4b437f5a01e321267697a8d76e5c5a39e9 /kernel/trace/trace_events.c
parentd07c9ad622474616e94572e59e725c2c4a494fb4 (diff)
tracing: Update print fmt check to handle new __get_sockaddr() macro
A helper macro was added to make reading socket addresses easier in trace events. It pairs %pISpc with __get_sockaddr() that reads the socket address from the ring buffer into a human readable format. The boot up check that makes sure that trace events do not reference pointers to memory that can later be freed when the trace event is read, incorrectly flagged this as a delayed reference. Update the check to handle "__get_sockaddr" and not report an error on it. Link: https://lore.kernel.org/all/20220125160505.068dbb52@canb.auug.org.au/ Reported-by: Stephen Rothwell <sfr@canb.auug.org.au> Signed-off-by: Steven Rostedt (Google) <rostedt@goodmis.org> Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
Diffstat (limited to 'kernel/trace/trace_events.c')
-rw-r--r--kernel/trace/trace_events.c6
1 files changed, 6 insertions, 0 deletions
diff --git a/kernel/trace/trace_events.c b/kernel/trace/trace_events.c
index 3147614c1812..f527ae807e77 100644
--- a/kernel/trace/trace_events.c
+++ b/kernel/trace/trace_events.c
@@ -384,6 +384,12 @@ static void test_event_printk(struct trace_event_call *call)
if (!(dereference_flags & (1ULL << arg)))
goto next_arg;
+ /* Check for __get_sockaddr */;
+ if (str_has_prefix(fmt + i, "__get_sockaddr(")) {
+ dereference_flags &= ~(1ULL << arg);
+ goto next_arg;
+ }
+
/* Find the REC-> in the argument */
c = strchr(fmt + i, ',');
r = strstr(fmt + i, "REC->");