This is a note to let you know that I've just added the patch titled
perf probe: Add warning message if there is unexpected event name
to the 4.15-stable tree which can be found at: http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git%3Ba=su...
The filename of the patch is: perf-probe-add-warning-message-if-there-is-unexpected-event-name.patch and it can be found in the queue-4.15 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree, please let stable@vger.kernel.org know about it.
From foo@baz Mon Apr 9 10:16:32 CEST 2018
From: Masami Hiramatsu mhiramat@kernel.org Date: Sat, 9 Dec 2017 01:26:46 +0900 Subject: perf probe: Add warning message if there is unexpected event name
From: Masami Hiramatsu mhiramat@kernel.org
[ Upstream commit 9f5c6d8777a2d962b0eeacb2a16f37da6bea545b ]
This improve the error message so that user can know event-name error before writing new events to kprobe-events interface.
E.g. ====== #./perf probe -x /lib64/libc-2.25.so malloc_get_state* Internal error: "malloc_get_state@GLIBC_2" is an invalid event name. Error: Failed to add events. ======
Reported-by: Arnaldo Carvalho de Melo acme@redhat.com Signed-off-by: Masami Hiramatsu mhiramat@kernel.org Acked-by: Ravi Bangoria ravi.bangoria@linux.vnet.ibm.com Reviewed-by: Thomas Richter tmricht@linux.vnet.ibm.com Tested-by: Arnaldo Carvalho de Melo acme@redhat.com Cc: Paul Clarke pc@us.ibm.com Cc: bhargavb bhargavaramudu@gmail.com Cc: linux-rt-users@vger.kernel.org Link: http://lkml.kernel.org/r/151275040665.24652.5188568529237584489.stgit@devbox Signed-off-by: Arnaldo Carvalho de Melo acme@redhat.com Signed-off-by: Sasha Levin alexander.levin@microsoft.com Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org --- tools/perf/util/probe-event.c | 8 ++++++++ 1 file changed, 8 insertions(+)
--- a/tools/perf/util/probe-event.c +++ b/tools/perf/util/probe-event.c @@ -2625,6 +2625,14 @@ static int get_new_event_name(char *buf,
out: free(nbase); + + /* Final validation */ + if (ret >= 0 && !is_c_func_name(buf)) { + pr_warning("Internal error: "%s" is an invalid event name.\n", + buf); + ret = -EINVAL; + } + return ret; }
Patches currently in stable-queue which might be from mhiramat@kernel.org are
queue-4.15/perf-probe-find-versioned-symbols-from-map.patch queue-4.15/perf-probe-add-warning-message-if-there-is-unexpected-event-name.patch