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tracing: Initialize ret in syscall_enter_define_fields()

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If syscall_enter_define_fields() is called on a system call with no
arguments, the return code variable "ret" will never get initialized.
Initialize it to zero.

Fixes: 04ae87a520 ("ftrace: Rework event_create_dir()")
Reported-by: Qian Cai <cai@lca.pw>
Signed-off-by: Steven Rostedt (VMware) <rostedt@goodmis.org>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Link: https://lore.kernel.org/r/0FA8C6E3-D9F5-416D-A1B0-5E4CD583A101@lca.pw
This commit is contained in:
Steven Rostedt (VMware) 2020-01-08 08:57:55 -05:00 committed by Peter Zijlstra
parent e4add24778
commit 31537cf8f3
1 changed files with 2 additions and 1 deletions
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3
kernel/trace/trace_syscalls.c
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@ -274,7 +274,8 @@ static int __init syscall_enter_define_fields(struct trace_event_call *call)
struct syscall_trace_enter trace;
struct syscall_metadata *meta = call->data;
int offset = offsetof(typeof(trace), args);
int ret, i;
int ret = 0;
int i;
for (i = 0; i < meta->nb_args; i++) {
ret = trace_define_field(call, meta->types[i],