diff options
| author | Tiezhu Yang <yangtiezhu@loongson.cn> | 2021-10-26 09:51:28 +0800 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2021-11-17 09:48:39 +0100 |
| commit | 3f3b4054e214a7555b048b4e70e6c2211a3fb2ab (patch) | |
| tree | 5e30b0b87678df631b2d0071022eb64599371fff /samples | |
| parent | 9435b2f9c006282fc134aae51596a714dd890d6e (diff) | |
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>
Diffstat (limited to 'samples')
| -rw-r--r-- | samples/kprobes/kretprobe_example.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/samples/kprobes/kretprobe_example.c b/samples/kprobes/kretprobe_example.c index 186315ca88b3..2701549ee7b3 100644 --- a/samples/kprobes/kretprobe_example.c +++ b/samples/kprobes/kretprobe_example.c @@ -84,7 +84,7 @@ static int __init kretprobe_init(void) ret = register_kretprobe(&my_kretprobe); if (ret < 0) { pr_err("register_kretprobe failed, returned %d\n", ret); - return -1; + return ret; } pr_info("Planted return probe at %s: %p\n", my_kretprobe.kp.symbol_name, my_kretprobe.kp.addr); |