linux-kernel - [tip:perfcounters/core] perf tools: do not complain if root is owning perf.data

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Message-ID: <tip-119e7a22bb70d84849384e5113792cd45afa4f85@git.kernel.org>
Date:	Fri, 28 Aug 2009 11:52:09 GMT
From:	tip-bot for Pierre Habouzit <pierre.habouzit@...ersec.com>
To:	linux-tip-commits@...r.kernel.org
Cc:	linux-kernel@...r.kernel.org, paulus@...ba.org, hpa@...or.com,
	mingo@...hat.com, a.p.zijlstra@...llo.nl,
	pierre.habouzit@...ersec.com, stable@...nel.org,
	tglx@...utronix.de, mingo@...e.hu
Subject: [tip:perfcounters/core] perf tools: do not complain if root is owning perf.data

Commit-ID:  119e7a22bb70d84849384e5113792cd45afa4f85
Gitweb:     http://git.kernel.org/tip/119e7a22bb70d84849384e5113792cd45afa4f85
Author:     Pierre Habouzit <pierre.habouzit@...ersec.com>
AuthorDate: Thu, 27 Aug 2009 09:59:02 +0200
Committer:  Ingo Molnar <mingo@...e.hu>
CommitDate: Fri, 28 Aug 2009 13:47:43 +0200

perf tools: do not complain if root is owning perf.data

This improves patch fa6963b24 so that perf.data stuff that has
been dumped as root can be read (annotate/report) by a user
without the use of the --force.

Rationale is that root has plenty of ways to screw us (usually)
that do not require twisted schemes involving specially
crafting a perf.data.

Signed-off-by: Pierre Habouzit <pierre.habouzit@...ersec.com>
Cc: Paul Mackerras <paulus@...ba.org>
Cc: Peter Zijlstra <a.p.zijlstra@...llo.nl>
Cc: <stable@...nel.org>
LKML-Reference: <20090827075902.GF19653@...hroaig.corp>
Signed-off-by: Ingo Molnar <mingo@...e.hu>


---
 tools/perf/builtin-annotate.c |    4 ++--
 tools/perf/builtin-report.c   |    4 ++--
 2 files changed, 4 insertions(+), 4 deletions(-)

diff --git a/tools/perf/builtin-annotate.c b/tools/perf/builtin-annotate.c
index 4ac618b..4c7bc44 100644
--- a/tools/perf/builtin-annotate.c
+++ b/tools/perf/builtin-annotate.c
@@ -984,8 +984,8 @@ static int __cmd_annotate(void)
 		exit(-1);
 	}
 
-	if (!force && (input_stat.st_uid != geteuid())) {
-		fprintf(stderr, "file: %s not owned by current user\n", input_name);
+	if (!force && input_stat.st_uid && (input_stat.st_uid != geteuid())) {
+		fprintf(stderr, "file: %s not owned by current user or root\n", input_name);
 		exit(-1);
 	}
 
diff --git a/tools/perf/builtin-report.c b/tools/perf/builtin-report.c
index d2e2882..ea6328a 100644
--- a/tools/perf/builtin-report.c
+++ b/tools/perf/builtin-report.c
@@ -1405,8 +1405,8 @@ static int __cmd_report(void)
 		exit(-1);
 	}
 
-	if (!force && (input_stat.st_uid != geteuid())) {
-		fprintf(stderr, "file: %s not owned by current user\n", input_name);
+	if (!force && input_stat.st_uid && (input_stat.st_uid != geteuid())) {
+		fprintf(stderr, "file: %s not owned by current user or root\n", input_name);
 		exit(-1);
 	}
 
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