uprobes: Fix return value in error handling path
authorzhangwei(Jovi) <jovi.zhangwei@huawei.com>
Thu, 13 Jun 2013 06:21:51 +0000 (14:21 +0800)
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>
Thu, 25 Jul 2013 21:07:31 +0000 (14:07 -0700)
commit3873153a61235a63517547e347db7ab90788486f
treead0ff8279a104ca01c872edca81e29e7673e8250
parent5df5df87f2b5f5d75825207d61a272b168d8cab6
uprobes: Fix return value in error handling path

commit fa44063f9ef163c3a4c8d8c0465bb8a056b42035 upstream.

When wrong argument is passed into uprobe_events it does not return
an error:

[root@jovi tracing]# echo 'p:myprobe /bin/bash' > uprobe_events
[root@jovi tracing]#

The proper response is:

[root@jovi tracing]# echo 'p:myprobe /bin/bash' > uprobe_events
-bash: echo: write error: Invalid argument

Link: http://lkml.kernel.org/r/51B964FF.5000106@huawei.com

Signed-off-by: zhangwei(Jovi) <jovi.zhangwei@huawei.com>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: <srikar@linux.vnet.ibm.com>
Signed-off-by: Steven Rostedt <rostedt@goodmis.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
kernel/trace/trace_uprobe.c