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Subject[PATCH 08/20] tools lib traceevent: Handle strdup failure cases
Date
From: Namhyung Kim <namhyung.kim@lge.com>

There were some places didn't check return value of the strdup and had
unneeded/duplicated checks. Fix it.

Signed-off-by: Namhyung Kim <namhyung.kim@lge.com>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Ingo Molnar <mingo@kernel.org>
Cc: Arnaldo Carvalho de Melo <acme@infradead.org>
Cc: Borislav Petkov <bp@alien8.de>
Cc: David Ahern <dsahern@gmail.com>
Link: http://lkml.kernel.org/r/1333940074-19052-5-git-send-email-namhyung.kim@lge.com
Signed-off-by: Steven Rostedt <rostedt@goodmis.org>
Signed-off-by: Namhyung Kim <namhyung@kernel.org>
---
tools/lib/traceevent/event-parse.c | 29 +++++++++++++++++++++++++++--
1 file changed, 27 insertions(+), 2 deletions(-)
diff --git a/tools/lib/traceevent/event-parse.c b/tools/lib/traceevent/event-parse.c
index 768fab5..cd334d5 100644
--- a/tools/lib/traceevent/event-parse.c
+++ b/tools/lib/traceevent/event-parse.c
@@ -467,8 +467,10 @@ int pevent_register_function(struct pevent *pevent, char *func,
item->mod = NULL;
item->addr = addr;

- pevent->funclist = item;
+ if (!item->func || (mod && !item->mod))
+ die("malloc func");

+ pevent->funclist = item;
pevent->func_count++;

return 0;
@@ -583,10 +585,13 @@ int pevent_register_print_string(struct pevent *pevent, char *fmt,
item = malloc_or_die(sizeof(*item));

item->next = pevent->printklist;
- pevent->printklist = item;
item->printk = strdup(fmt);
item->addr = addr;

+ if (!item->printk)
+ die("malloc fmt");
+
+ pevent->printklist = item;
pevent->printk_count++;

return 0;
@@ -2150,6 +2155,8 @@ process_fields(struct event_format *event, struct print_flag_sym **list, char **
if (value == NULL)
goto out_free;
field->value = strdup(value);
+ if (field->value == NULL)
+ goto out_free;

free_arg(arg);
arg = alloc_arg();
@@ -2163,6 +2170,8 @@ process_fields(struct event_format *event, struct print_flag_sym **list, char **
if (value == NULL)
goto out_free;
field->str = strdup(value);
+ if (field->str == NULL)
+ goto out_free;
free_arg(arg);
arg = NULL;

@@ -3433,6 +3442,9 @@ process_defined_func(struct trace_seq *s, void *data, int size,
string = malloc_or_die(sizeof(*string));
string->next = strings;
string->str = strdup(str.buffer);
+ if (!string->str)
+ die("malloc str");
+
strings = string;
trace_seq_destroy(&str);
break;
@@ -3571,6 +3583,8 @@ static struct print_arg *make_bprint_args(char *fmt, void *data, int size, struc
arg->next = NULL;
arg->type = PRINT_BSTRING;
arg->string.string = strdup(bptr);
+ if (!arg->string.string)
+ break;
bptr += strlen(bptr) + 1;
*next = arg;
next = &arg->next;
@@ -4666,6 +4680,8 @@ int pevent_parse_event(struct pevent *pevent,
die("failed to read event id");

event->system = strdup(sys);
+ if (!event->system)
+ die("failed to allocate system");

/* Add pevent to event so that it can be referenced */
event->pevent = pevent;
@@ -4707,6 +4723,10 @@ int pevent_parse_event(struct pevent *pevent,
list = &arg->next;
arg->type = PRINT_FIELD;
arg->field.name = strdup(field->name);
+ if (!arg->field.name) {
+ do_warning("failed to allocate field name");
+ goto event_failed;
+ }
arg->field.field = field;
}
return 0;
@@ -5050,6 +5070,11 @@ int pevent_register_event_handler(struct pevent *pevent,
if (sys_name)
handle->sys_name = strdup(sys_name);

+ if ((event_name && !handle->event_name) ||
+ (sys_name && !handle->sys_name)) {
+ die("Failed to allocate event/sys name");
+ }
+
handle->func = func;
handle->next = pevent->handlers;
pevent->handlers = handle;
--
1.7.9.2.358.g22243


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