From: Masami Hiramatsu <mhiramat@kernel.org>
To: Steven Rostedt <rostedt@goodmis.org>
Cc: Masami Hiramatsu <mhiramat@kernel.org>, linux-kernel@vger.kernel.org
Subject: [BUGFIX PATCH] tracing/kprobes: Fix strpbrk() argument order
Date: Thu, 1 Nov 2018 23:29:28 +0900
Message-ID: <154108256792.2604.1816052586385217811.stgit@devbox> (raw)
Fix strpbrk()'s argument order, it must pass acceptable string
in 2nd argument. Note that this can cause a kernel panic where
it recovers backup character to code->data.
Fixes: a6682814f371 ("tracing/kprobes: Allow kprobe-events to record module symbol")
Signed-off-by: Masami Hiramatsu <mhiramat@kernel.org>
---
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 3ef15a6683c0..bd30e9398d2a 100644
--- a/kernel/trace/trace_probe.c
+++ b/kernel/trace/trace_probe.c
@@ -535,7 +535,7 @@ int traceprobe_update_arg(struct probe_arg *arg)
if (code[1].op != FETCH_OP_IMM)
return -EINVAL;
- tmp = strpbrk("+-", code->data);
+ tmp = strpbrk(code->data, "+-");
if (tmp)
c = *tmp;
ret = traceprobe_split_symbol_offset(code->data,
next reply index
Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-11-01 14:29 Masami Hiramatsu [this message]
2018-11-01 19:10 ` Steven Rostedt
2018-11-02 7:14 ` Masami Hiramatsu
2018-11-02 13:54 ` Steven Rostedt
2018-11-03 11:54 ` Masami Hiramatsu
2018-11-03 13:17 ` Steven Rostedt
2018-11-03 16:21 ` Masami Hiramatsu
2018-11-03 16:03 ` [RFC PATCH] tracing/kprobes: Avoid parsing symbol+offset when updating arguments Masami Hiramatsu
2018-11-03 17:43 ` Steven Rostedt
2018-11-04 2:13 ` Masami Hiramatsu
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