linux-kernel - [tip:perf/urgent] perf_event: Fix __dsos__write_buildid

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Date:	Mon, 7 Dec 2009 05:31:18 GMT
From:	tip-bot for Xiao Guangrong <xiaoguangrong@...fujitsu.com>
To:	linux-tip-commits@...r.kernel.org
Cc:	linux-kernel@...r.kernel.org, paulus@...ba.org, hpa@...or.com,
	mingo@...hat.com, lizf@...fujitsu.com, peterz@...radead.org,
	xiaoguangrong@...fujitsu.com, fweisbec@...il.com,
	hirofumi@...l.parknet.co.jp, tglx@...utronix.de, mingo@...e.hu
Subject: [tip:perf/urgent] perf_event: Fix __dsos__write_buildid_table()

Commit-ID:  d9541ed3241bb6c2b805d3ea0e87563cf2a0c5c3
Gitweb:     http://git.kernel.org/tip/d9541ed3241bb6c2b805d3ea0e87563cf2a0c5c3
Author:     Xiao Guangrong <xiaoguangrong@...fujitsu.com>
AuthorDate: Mon, 7 Dec 2009 12:07:15 +0800
Committer:  Ingo Molnar <mingo@...e.hu>
CommitDate: Mon, 7 Dec 2009 06:26:24 +0100

perf_event: Fix __dsos__write_buildid_table()

The remain buff size is 'len - pos->long_name_len - 1', not
'len - pos->long_name_len + 1'

This bug was introduced by commit 7691b1e ("perf tools: Misc small
fixes").

Signed-off-by: Xiao Guangrong <xiaoguangrong@...fujitsu.com>
Acked-by: OGAWA Hirofumi <hirofumi@...l.parknet.co.jp>
Cc: Frederic Weisbecker <fweisbec@...il.com>
Cc: Paul Mackerras <paulus@...ba.org>
Cc: Peter Zijlstra <peterz@...radead.org>
Cc: Li Zefan <lizf@...fujitsu.com>
LKML-Reference: <4B1C7F73.80707@...fujitsu.com>
Signed-off-by: Ingo Molnar <mingo@...e.hu>
---
 tools/perf/util/header.c |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)

diff --git a/tools/perf/util/header.c b/tools/perf/util/header.c
index 08b6759..59a9c0b 100644
--- a/tools/perf/util/header.c
+++ b/tools/perf/util/header.c
@@ -209,7 +209,7 @@ static int __dsos__write_buildid_table(struct list_head *head, int fd)
 		err = do_write(fd, pos->long_name, pos->long_name_len + 1);
 		if (err < 0)
 			return err;
-		err = do_write(fd, zero_buf, len - pos->long_name_len + 1);
+		err = do_write(fd, zero_buf, len - pos->long_name_len - 1);
 		if (err < 0)
 			return err;
 	}
--
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