Commit-ID: d0e02579c282ccf34c79818045ec2d2934b56c19
Gitweb: http://git.kernel.org/tip/d0e02579c282ccf34c79818045ec2d2934b56c19
Author: Steven Rostedt (VMware) <rostedt@xxxxxxxxxxx>
AuthorDate: Mon, 27 Feb 2017 11:52:04 -0500
Committer: Arnaldo Carvalho de Melo <acme@xxxxxxxxxx>
CommitDate: Fri, 3 Mar 2017 19:07:19 -0300
trace/kprobes: Add back warning about offset in return probes
Let's not remove the warning about offsets and return probes when the
offset is invalid.
Signed-off-by: Steven Rostedt <rostedt@xxxxxxxxxxx>
Acked-by: Masami Hiramatsu <mhiramat@xxxxxxxxxx>
Acked-by: Naveen N. Rao <naveen.n.rao@xxxxxxxxxxxxxxxxxx>
Cc: Ananth N Mavinakayanahalli <ananth@xxxxxxxxxxxxxxxxxx>
Cc: Michael Ellerman <mpe@xxxxxxxxxxxxxx>
Cc: linuxppc-dev@xxxxxxxxxxxxxxxx
Link: http://lkml.kernel.org/r/20170227115204.00f92846@xxxxxxxxxxxxxxxxxx
Signed-off-by: Arnaldo Carvalho de Melo <acme@xxxxxxxxxx>
---
kernel/trace/trace_kprobe.c | 5 +++++
1 file changed, 5 insertions(+)
diff --git a/kernel/trace/trace_kprobe.c b/kernel/trace/trace_kprobe.c
index 18775ef..2b7d0dd 100644
--- a/kernel/trace/trace_kprobe.c
+++ b/kernel/trace/trace_kprobe.c
@@ -695,6 +695,11 @@ static int create_trace_kprobe(int argc, char **argv)
pr_info("Failed to parse symbol.\n");
return ret;
}
+ if (offset && is_return &&
+ !arch_function_offset_within_entry(offset)) {
+ pr_info("Given offset is not valid for return probe.\n");
+ return -EINVAL;
+ }
}
argc -= 2; argv += 2;
--
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