linux-kernel - [PATCH] perfcounters: Fixes for filename:line displays

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [thread-next>] [day] [month] [year] [list]

Message-Id: <1244907563-7820-1-git-send-email-fweisbec@gmail.com>
Date:	Sat, 13 Jun 2009 17:39:23 +0200
From:	Frederic Weisbecker <fweisbec@...il.com>
To:	Ingo Molnar <mingo@...e.hu>
Cc:	LKML <linux-kernel@...r.kernel.org>,
	Peter Zijlstra <a.p.zijlstra@...llo.nl>,
	Mike Galbraith <efault@....de>,
	Paul Mackerras <paulus@...ba.org>,
	Frederic Weisbecker <fweisbec@...il.com>
Subject: [PATCH] perfcounters: Fixes for filename:line displays

- fix addr2line on userspace binary: don't only check kernel image.
- fix string allocation size for path: missing ending null char room
- fix overflow in symbol extra info

Reported-by: Ingo Molnar <mingo@...e.hu>
Signed-off-by: Frederic Weisbecker <fweisbec@...il.com>
---
 tools/perf/builtin-annotate.c |   11 ++++++-----
 1 files changed, 6 insertions(+), 5 deletions(-)

diff --git a/tools/perf/builtin-annotate.c b/tools/perf/builtin-annotate.c
index 7a5b278..94cea67 100644
--- a/tools/perf/builtin-annotate.c
+++ b/tools/perf/builtin-annotate.c
@@ -1116,7 +1116,7 @@ parse_line(FILE *file, struct symbol *sym, __u64 start, __u64 len)
 		if (offset < len)
 			hits = sym->hist[offset];
 
-		if (sym_ext) {
+		if (offset < len && sym_ext) {
 			path = sym_ext[offset].path;
 			percent = sym_ext[offset].percent;
 		} else if (sym->hist_sum)
@@ -1190,7 +1190,8 @@ static void free_source_line(struct symbol *sym, int len)
 }
 
 /* Get the filename:line for the colored entries */
-static void get_source_line(struct symbol *sym, __u64 start, int len)
+static void
+get_source_line(struct symbol *sym, __u64 start, int len, char *filename)
 {
 	int i;
 	char cmd[PATH_MAX * 2];
@@ -1216,7 +1217,7 @@ static void get_source_line(struct symbol *sym, __u64 start, int len)
 			continue;
 
 		offset = start + i;
-		sprintf(cmd, "addr2line -e %s %016llx", vmlinux, offset);
+		sprintf(cmd, "addr2line -e %s %016llx", filename, offset);
 		fp = popen(cmd, "r");
 		if (!fp)
 			continue;
@@ -1224,7 +1225,7 @@ static void get_source_line(struct symbol *sym, __u64 start, int len)
 		if (getline(&path, &line_len, fp) < 0 || !line_len)
 			goto next;
 
-		sym_ext[i].path = malloc(sizeof(char) * line_len);
+		sym_ext[i].path = malloc(sizeof(char) * line_len + 1);
 		if (!sym_ext[i].path)
 			goto next;
 
@@ -1285,7 +1286,7 @@ static void annotate_sym(struct dso *dso, struct symbol *sym)
 	len = sym->end - sym->start;
 
 	if (print_line) {
-		get_source_line(sym, start, len);
+		get_source_line(sym, start, len, filename);
 		print_summary(filename);
 	}
 
-- 
1.6.2.3

--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/