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tracing/uprobes: Check the return value of kstrdup() for tu->filename

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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@kernel.org>
Fixes: 33ea4b24277b ("perf/core: Implement the 'perf_uprobe' PMU")
Signed-off-by: Xiaoke Wang <xkernel.wang@foxmail.com>
Signed-off-by: Steven Rostedt <rostedt@goodmis.org>
This commit is contained in:
Xiaoke Wang 2021-12-14 09:28:02 +08:00 committed by Steven Rostedt
parent 289e7b0f7e
commit 8c72242455
1 changed files with 5 additions and 0 deletions
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5
kernel/trace/trace_uprobe.c
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@ -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;