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[PATCH] check for strlen()==0 before accessing strlen()-1

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kay.sievers@vrfy.org 2005-03-28 12:37:54 +02:00 committed by Greg KH
parent db949b0248
commit bb1a77d34c
1 changed files with 4 additions and 3 deletions
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7
udev_rules.c
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@ -594,15 +594,16 @@ static int match_rule(struct udevice *udev, struct udev_rule *rule,
for (i = 0; i < rule->sysfs_pair_count; i++) {
struct key_pair *pair;
char value[VALUE_SIZE];
size_t len;
pair = &rule->sysfs_pair[i];
if (find_sysfs_attribute(class_dev, parent_device, pair->name, value, sizeof(value)) != 0)
goto try_parent;
/* strip trailing whitespace of value, if not asked to match for it */
if (!isspace(pair->value[strlen(pair->value)-1])) {
size_t len = strlen(value);
len = strlen(pair->value);
if (len && !isspace(pair->value[len-1])) {
len = strlen(value);
while (len > 0 && isspace(value[len-1]))
value[--len] = '\0';
dbg("removed %i trailing whitespace chars from '%s'", strlen(value)-len, value);