Patch "perf tools: Fix copyfile_offset update of output offset" has been added to the 4.15-stable tree

Patch "perf tools: Fix copyfile_offset update of output offset" has been added to the 4.15-stable tree

[gregkh]

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

    perf tools: Fix copyfile_offset update of output offset

to the 4.15-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-tools-fix-copyfile_offset-update-of-output-offset.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: Jiri Olsa <jolsa@kernel.org>
Date: Tue, 9 Jan 2018 14:39:23 +0100
Subject: perf tools: Fix copyfile_offset update of output offset

From: Jiri Olsa <jolsa@kernel.org>


[ Upstream commit fa1195ccc0af2d121abe0fe266a1caee8c265eea ]

We need to increase output offset in each iteration, not decrease it as
we currently do.

I guess we were lucky to finish in most cases in first iteration, so the
bug never showed. However it shows a lot when working with big (~4GB)
size data.

Signed-off-by: Jiri Olsa <jolsa@kernel.org>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Andi Kleen <ak@linux.intel.com>
Cc: David Ahern <dsahern@gmail.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Fixes: 9c9f5a2f1944 ("perf tools: Introduce copyfile_offset() function")
Link: http://lkml.kernel.org/r/20180109133923.25406-1-jolsa@kernel.org
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/util.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

--- a/tools/perf/util/util.c
+++ b/tools/perf/util/util.c
@@ -210,7 +210,7 @@ static int copyfile_offset(int ifd, loff
 
 		size -= ret;
 		off_in += ret;
-		off_out -= ret;
+		off_out += ret;
 	}
 	munmap(ptr, off_in + size);
 


Patches currently in stable-queue which might be from jolsa@kernel.org are

queue-4.15/perf-evsel-fix-swap-for-samples-with-raw-data.patch
queue-4.15/perf-tools-fix-copyfile_offset-update-of-output-offset.patch
queue-4.15/perf-report-fix-a-no-annotate-browser-displayed-issue.patch