From 261608f3105ce65e9fd01919f72ead74dcb9f14d Mon Sep 17 00:00:00 2001 From: Masami Hiramatsu Date: Wed, 23 Mar 2022 16:35:36 +0900 Subject: fprobe: Fix sparse warning for acccessing __rcu ftrace_hash Since ftrace_ops::local_hash::filter_hash field is an __rcu pointer, we have to use rcu_access_pointer() to access it. Reported-by: kernel test robot Signed-off-by: Masami Hiramatsu Signed-off-by: Alexei Starovoitov Link: https://lore.kernel.org/bpf/164802093635.1732982.4938094876018890866.stgit@devnote2 --- kernel/trace/fprobe.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) (limited to 'kernel/trace') diff --git a/kernel/trace/fprobe.c b/kernel/trace/fprobe.c index 63b2321b22a0..89d9f994ebb0 100644 --- a/kernel/trace/fprobe.c +++ b/kernel/trace/fprobe.c @@ -215,7 +215,7 @@ int register_fprobe(struct fprobe *fp, const char *filter, const char *notfilter * correctly calculate the total number of filtered symbols * from both filter and notfilter. */ - hash = fp->ops.local_hash.filter_hash; + hash = rcu_access_pointer(fp->ops.local_hash.filter_hash); if (WARN_ON_ONCE(!hash)) goto out; -- cgit 1.4.1