Patch "perf/core: Don't leak event in the syscall error path" has been added to the 4.5-stable tree

Patch "perf/core: Don't leak event in the syscall error path" has been added to the 4.5-stable tree

[gregkh]

This is a note to let you know that I've just added the patch titled

    perf/core: Don't leak event in the syscall error path

to the 4.5-stable tree which can be found at:
    http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary

The filename of the patch is:
     perf-core-don-t-leak-event-in-the-syscall-error-path.patch
and it can be found in the queue-4.5 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 201c2f85bd0bc13b712d9c0b3d11251b182e06ae Mon Sep 17 00:00:00 2001
From: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Date: Mon, 21 Mar 2016 10:02:42 +0200
Subject: perf/core: Don't leak event in the syscall error path

From: Alexander Shishkin <alexander.shishkin@linux.intel.com>

commit 201c2f85bd0bc13b712d9c0b3d11251b182e06ae upstream.

In the error path, event_file not being NULL is used to determine
whether the event itself still needs to be free'd, so fix it up to
avoid leaking.

Reported-by: Leon Yu <chianglungyu@gmail.com>
Signed-off-by: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Cc: Arnaldo Carvalho de Melo <acme@kernel.org>
Cc: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Stephane Eranian <eranian@google.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Vince Weaver <vincent.weaver@maine.edu>
Fixes: 130056275ade ("perf: Do not double free")
Link: http://lkml.kernel.org/r/87twk06yxp.fsf@ashishki-desk.ger.corp.intel.com
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

---
 kernel/events/core.c |    1 +
 1 file changed, 1 insertion(+)

--- a/kernel/events/core.c
+++ b/kernel/events/core.c
@@ -8479,6 +8479,7 @@ SYSCALL_DEFINE5(perf_event_open,
 					f_flags);
 	if (IS_ERR(event_file)) {
 		err = PTR_ERR(event_file);
+		event_file = NULL;
 		goto err_context;
 	}
 


Patches currently in stable-queue which might be from alexander.shishkin@linux.intel.com are

queue-4.5/perf-core-fix-time-tracking-bug-with-multiplexing.patch
queue-4.5/perf-stat-document-detailed-option.patch
queue-4.5/perf-core-don-t-leak-event-in-the-syscall-error-path.patch