On Wed, 26 Feb 2025 15:18:46 +0900 "Masami Hiramatsu (Google)" mhiramat@kernel.org wrote:
From: Masami Hiramatsu (Google) mhiramat@kernel.org
Fix a memory leak when a tprobe is defined with $retval. This combination is not allowed, but the parse_symbol_and_return() does not free the *symbol which should not be used if it returns the error. Thus, it leaks the *symbol memory in that error path.
Fixes: ce51e6153f77 ("tracing: fprobe-event: Fix to check tracepoint event and return") Signed-off-by: Masami Hiramatsu (Google) mhiramat@kernel.org Cc: stable@vger.kernel.org
Reviewed-by: Steven Rostedt (Google) rostedt@goodmis.org
-- Steve
kernel/trace/trace_fprobe.c | 2 ++ 1 file changed, 2 insertions(+)
diff --git a/kernel/trace/trace_fprobe.c b/kernel/trace/trace_fprobe.c index b8f3c4ba309b..8826f44f69a4 100644 --- a/kernel/trace/trace_fprobe.c +++ b/kernel/trace/trace_fprobe.c @@ -1056,6 +1056,8 @@ static int parse_symbol_and_return(int argc, const char *argv[], if (is_tracepoint) { trace_probe_log_set_index(i); trace_probe_log_err(tmp - argv[i], RETVAL_ON_PROBE);
kfree(*symbol);*symbol = NULL; return -EINVAL; } *is_return = true;