| commit | 421fd0845eaeecce6b3806f7f0c0d67d1f9ad108 | [log] [tgz] |
|---|---|---|
| author | Wang Nan <wangnan0@huawei.com> | Fri Nov 06 09:50:15 2015 +0000 |
| committer | Arnaldo Carvalho de Melo <acme@redhat.com> | Wed Nov 11 18:41:32 2015 -0300 |
| tree | aaacfa9c48bec1daa5b0fb8c8809d0d74333a2c0 | |
| parent | e87b49116dedba3464fd8d0ec9393b4841167334 [diff] |
perf probe: Verify parameters in two functions
On kernel with only one out of CONFIG_KPROBE_EVENTS and
CONFIG_UPROBE_EVENTS enabled, 'perf probe -d' causes a segfault because
perf_del_probe_events() calls probe_file__get_events() with a negative
fd.
This patch fixes it by adding parameter validation at the entry of
probe_file__get_events() and probe_file__get_rawlist(). Since they are
both non-static public functions (in .h file), parameter verifying is
required.
v1 -> v2: Verify fd at the head of probe_file__get_rawlist() instead of
checking at call site (suggested by Masami and Arnaldo at [1,2]).
[1] http://lkml.kernel.org/r/50399556C9727B4D88A595C8584AAB37526048E3@GSjpTKYDCembx32.service.hitachi.net
[2] http://lkml.kernel.org/r/20151105155830.GV13236@kernel.org
Signed-off-by: Wang Nan <wangnan0@huawei.com>
Acked-by: Masami Hiramatsu <masami.hiramatsu.pt@hitachi.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Zefan Li <lizefan@huawei.com>
Cc: pi3orama@163.com
Link: http://lkml.kernel.org/r/1446803415-83382-1-git-send-email-wangnan0@huawei.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>