From: Masami Hiramatsu (Google) <[email protected]> Sashiko found that user can cause this WARN_ON_ONCE() easily with adding a kprobe event based on a raw address with BTF parameter.
Since this is not an unexpected condition, remove the WARN_ON_ONCE(). Link: https://sashiko.dev/#/patchset/178165816303.269421.7302603996990753309.stgit%40devnote2 Reported-by: Sashiko <[email protected]> Fixes: b576e09701c7 ("tracing/probes: Support function parameters if BTF is available") Signed-off-by: Masami Hiramatsu (Google) <[email protected]> --- kernel/trace/trace_probe.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/kernel/trace/trace_probe.c b/kernel/trace/trace_probe.c index fd1caa1f9723..98532c503d02 100644 --- a/kernel/trace/trace_probe.c +++ b/kernel/trace/trace_probe.c @@ -678,7 +678,7 @@ static int parse_btf_arg(char *varname, int i, is_ptr, ret; u32 tid; - if (WARN_ON_ONCE(!ctx->funcname && !(ctx->flags & TPARG_FL_TEVENT))) + if (!ctx->funcname && !(ctx->flags & TPARG_FL_TEVENT)) return -EINVAL; is_ptr = split_next_field(varname, &field, ctx);
