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Message-ID: <20220111173114.706348158@goodmis.org>
Date: Tue, 11 Jan 2022 12:30:39 -0500
From: Steven Rostedt <rostedt@...dmis.org>
To: linux-kernel@...r.kernel.org
Cc: Ingo Molnar <mingo@...nel.org>,
Andrew Morton <akpm@...ux-foundation.org>,
Masami Hiramatsu <mhiramat@...nel.org>,
Xiaoke Wang <xkernel.wang@...mail.com>
Subject: [for-next][PATCH 08/31] tracing/uprobes: Check the return value of kstrdup() for tu->filename
From: Xiaoke Wang <xkernel.wang@...mail.com>
kstrdup() returns NULL when some internal memory errors happen, it is
better to check the return value of it so to catch the memory error in
time.
Link: https://lkml.kernel.org/r/tencent_3C2E330722056D7891D2C83F29C802734B06@qq.com
Acked-by: Masami Hiramatsu <mhiramat@...nel.org>
Fixes: 33ea4b24277b ("perf/core: Implement the 'perf_uprobe' PMU")
Signed-off-by: Xiaoke Wang <xkernel.wang@...mail.com>
Signed-off-by: Steven Rostedt <rostedt@...dmis.org>
---
kernel/trace/trace_uprobe.c | 5 +++++
1 file changed, 5 insertions(+)
diff --git a/kernel/trace/trace_uprobe.c b/kernel/trace/trace_uprobe.c
index 3bd09d612137..08b0e8417302 100644
--- a/kernel/trace/trace_uprobe.c
+++ b/kernel/trace/trace_uprobe.c
@@ -1609,6 +1609,11 @@ create_local_trace_uprobe(char *name, unsigned long offs,
tu->path = path;
tu->ref_ctr_offset = ref_ctr_offset;
tu->filename = kstrdup(name, GFP_KERNEL);
+ if (!tu->filename) {
+ ret = -ENOMEM;
+ goto error;
+ }
+
init_trace_event_call(tu);
ptype = is_ret_probe(tu) ? PROBE_PRINT_RETURN : PROBE_PRINT_NORMAL;
--
2.33.0
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