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authorWang Nan <wangnan0@huawei.com>2015-11-06 09:50:15 +0000
committerArnaldo Carvalho de Melo <acme@redhat.com>2015-11-11 18:41:32 -0300
commit421fd0845eaeecce6b3806f7f0c0d67d1f9ad108 (patch)
treeaaacfa9c48bec1daa5b0fb8c8809d0d74333a2c0 /tools/include
parente87b49116dedba3464fd8d0ec9393b4841167334 (diff)
downloadlinux-421fd0845eaeecce6b3806f7f0c0d67d1f9ad108.tar.gz
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>
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