This is a note to let you know that I've just added the patch titled
tracing/uprobes: Check the return value of kstrdup() for tu->filename
to the 5.15-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
tracing-uprobes-check-the-return-value-of-kstrdup-fo.patch
and it can be found in the queue-5.15 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
commit ac0ec9e7013ce804238e9dfbb81ec708b0d918e5
Author: Xiaoke Wang <xkernel.wang@xxxxxxxxxxx>
Date: Tue Dec 14 09:28:02 2021 +0800
tracing/uprobes: Check the return value of kstrdup() for tu->filename
[ Upstream commit 8c7224245557707c613f130431cafbaaa4889615 ]
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@xxxxxx
Acked-by: Masami Hiramatsu <mhiramat@xxxxxxxxxx>
Fixes: 33ea4b24277b ("perf/core: Implement the 'perf_uprobe' PMU")
Signed-off-by: Xiaoke Wang <xkernel.wang@xxxxxxxxxxx>
Signed-off-by: Steven Rostedt <rostedt@xxxxxxxxxxx>
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
diff --git a/kernel/trace/trace_uprobe.c b/kernel/trace/trace_uprobe.c
index f5f0039d31e5a..78ec1c16ccf4b 100644
--- a/kernel/trace/trace_uprobe.c
+++ b/kernel/trace/trace_uprobe.c
@@ -1619,6 +1619,11 @@ 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;
