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Message-Id: <1341380130-23863-9-git-send-email-namhyung@kernel.org>
Date: Wed, 4 Jul 2012 14:35:23 +0900
From: Namhyung Kim <namhyung@...nel.org>
To: Arnaldo Carvalho de Melo <acme@...stprotocols.net>
Cc: Peter Zijlstra <a.p.zijlstra@...llo.nl>,
Paul Mackerras <paulus@...ba.org>,
Ingo Molnar <mingo@...nel.org>,
LKML <linux-kernel@...r.kernel.org>,
Steven Rostedt <rostedt@...dmis.org>,
Frederic Weisbecker <fweisbec@...il.com>,
Namhyung Kim <namhyung.kim@....com>,
Arnaldo Carvalho de Melo <acme@...radead.org>,
Borislav Petkov <bp@...en8.de>, David Ahern <dsahern@...il.com>
Subject: [PATCH 09/16] tools lib traceevent: Handle realloc() failure path
From: Namhyung Kim <namhyung.kim@....com>
The realloc can fail so that we should handle it properly.
Signed-off-by: Namhyung Kim <namhyung.kim@....com>
Cc: Frederic Weisbecker <fweisbec@...il.com>
Cc: Ingo Molnar <mingo@...nel.org>
Cc: Arnaldo Carvalho de Melo <acme@...radead.org>
Cc: Borislav Petkov <bp@...en8.de>
Cc: David Ahern <dsahern@...il.com>
Link: http://lkml.kernel.org/r/1333940074-19052-7-git-send-email-namhyung.kim@lge.com
Signed-off-by: Steven Rostedt <rostedt@...dmis.org>
Signed-off-by: Namhyung Kim <namhyung@...nel.org>
---
tools/lib/traceevent/event-parse.c | 76 ++++++++++++++++++++++++++++--------
1 file changed, 60 insertions(+), 16 deletions(-)
diff --git a/tools/lib/traceevent/event-parse.c b/tools/lib/traceevent/event-parse.c
index cd334d52d333..05eb6b40b16a 100644
--- a/tools/lib/traceevent/event-parse.c
+++ b/tools/lib/traceevent/event-parse.c
@@ -1264,9 +1264,15 @@ static int event_read_fields(struct event_format *event, struct format_field **f
field->flags |= FIELD_IS_POINTER;
if (field->type) {
- field->type = realloc(field->type,
- strlen(field->type) +
- strlen(last_token) + 2);
+ char *new_type;
+ new_type = realloc(field->type,
+ strlen(field->type) +
+ strlen(last_token) + 2);
+ if (!new_type) {
+ free(last_token);
+ goto fail;
+ }
+ field->type = new_type;
strcat(field->type, " ");
strcat(field->type, last_token);
free(last_token);
@@ -1291,6 +1297,7 @@ static int event_read_fields(struct event_format *event, struct format_field **f
if (strcmp(token, "[") == 0) {
enum event_type last_type = type;
char *brackets = token;
+ char *new_brackets;
int len;
field->flags |= FIELD_IS_ARRAY;
@@ -1310,9 +1317,14 @@ static int event_read_fields(struct event_format *event, struct format_field **f
len = 1;
last_type = type;
- brackets = realloc(brackets,
- strlen(brackets) +
- strlen(token) + len);
+ new_brackets = realloc(brackets,
+ strlen(brackets) +
+ strlen(token) + len);
+ if (!new_brackets) {
+ free(brackets);
+ goto fail;
+ }
+ brackets = new_brackets;
if (len == 2)
strcat(brackets, " ");
strcat(brackets, token);
@@ -1328,7 +1340,12 @@ static int event_read_fields(struct event_format *event, struct format_field **f
free_token(token);
- brackets = realloc(brackets, strlen(brackets) + 2);
+ new_brackets = realloc(brackets, strlen(brackets) + 2);
+ if (!new_brackets) {
+ free(brackets);
+ goto fail;
+ }
+ brackets = new_brackets;
strcat(brackets, "]");
/* add brackets to type */
@@ -1339,10 +1356,16 @@ static int event_read_fields(struct event_format *event, struct format_field **f
* the format: type [] item;
*/
if (type == EVENT_ITEM) {
- field->type = realloc(field->type,
- strlen(field->type) +
- strlen(field->name) +
- strlen(brackets) + 2);
+ char *new_type;
+ new_type = realloc(field->type,
+ strlen(field->type) +
+ strlen(field->name) +
+ strlen(brackets) + 2);
+ if (!new_type) {
+ free(brackets);
+ goto fail;
+ }
+ field->type = new_type;
strcat(field->type, " ");
strcat(field->type, field->name);
free_token(field->name);
@@ -1350,9 +1373,15 @@ static int event_read_fields(struct event_format *event, struct format_field **f
field->name = token;
type = read_token(&token);
} else {
- field->type = realloc(field->type,
- strlen(field->type) +
- strlen(brackets) + 1);
+ char *new_type;
+ new_type = realloc(field->type,
+ strlen(field->type) +
+ strlen(brackets) + 1);
+ if (!new_type) {
+ free(brackets);
+ goto fail;
+ }
+ field->type = new_type;
strcat(field->type, brackets);
}
free(brackets);
@@ -1735,10 +1764,16 @@ process_op(struct event_format *event, struct print_arg *arg, char **tok)
/* could just be a type pointer */
if ((strcmp(arg->op.op, "*") == 0) &&
type == EVENT_DELIM && (strcmp(token, ")") == 0)) {
+ char *new_atom;
+
if (left->type != PRINT_ATOM)
die("bad pointer type");
- left->atom.atom = realloc(left->atom.atom,
+ new_atom = realloc(left->atom.atom,
strlen(left->atom.atom) + 3);
+ if (!new_atom)
+ goto out_free;
+
+ left->atom.atom = new_atom;
strcat(left->atom.atom, " *");
free(arg->op.op);
*arg = *left;
@@ -2597,7 +2632,16 @@ process_arg_token(struct event_format *event, struct print_arg *arg,
}
/* atoms can be more than one token long */
while (type == EVENT_ITEM) {
- atom = realloc(atom, strlen(atom) + strlen(token) + 2);
+ char *new_atom;
+ new_atom = realloc(atom,
+ strlen(atom) + strlen(token) + 2);
+ if (!new_atom) {
+ free(atom);
+ *tok = NULL;
+ free_token(token);
+ return EVENT_ERROR;
+ }
+ atom = new_atom;
strcat(atom, " ");
strcat(atom, token);
free_token(token);
--
1.7.10.4
--
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