tree 51c8476a025d3c53b7fd5432777d5d6b0b3fcdd8
parent c3ac751944ab8ca89d8b2e33fa58920798a4400c
author Tiezhu Yang <yangtiezhu@loongson.cn> 1635213088 +0800
committer Greg Kroah-Hartman <gregkh@linuxfoundation.org> 1637240651 +0100

samples/kretprobes: Fix return value if register_kretprobe() failed

[ Upstream commit f76fbbbb5061fe14824ba5807c44bd7400a6b4e1 ]

Use the actual return value instead of always -1 if register_kretprobe()
failed.

E.g. without this patch:

 # insmod samples/kprobes/kretprobe_example.ko func=no_such_func
 insmod: ERROR: could not insert module samples/kprobes/kretprobe_example.ko: Operation not permitted

With this patch:

 # insmod samples/kprobes/kretprobe_example.ko func=no_such_func
 insmod: ERROR: could not insert module samples/kprobes/kretprobe_example.ko: Unknown symbol in module

Link: https://lkml.kernel.org/r/1635213091-24387-2-git-send-email-yangtiezhu@loongson.cn

Fixes: 804defea1c02 ("Kprobes: move kprobe examples to samples/")
Signed-off-by: Tiezhu Yang <yangtiezhu@loongson.cn>
Acked-by: Masami Hiramatsu <mhiramat@kernel.org>
Signed-off-by: Steven Rostedt (VMware) <rostedt@goodmis.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>