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parisc: pdc_stable.c: Avoid potential stack overflows

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Signed-off-by: Helge Deller <deller@gmx.de>
This commit is contained in:
Helge Deller 2014-09-21 22:31:08 +02:00
parent 94c457deff
commit c735483de1
1 changed files with 7 additions and 5 deletions
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12
drivers/parisc/pdc_stable.c
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@ -278,7 +278,7 @@ pdcspath_hwpath_write(struct pdcspath_entry *entry, const char *buf, size_t coun
{
struct hardware_path hwpath;
unsigned short i;
char in[count+1], *temp;
char in[64], *temp;
struct device *dev;
int ret;
@ -286,8 +286,9 @@ pdcspath_hwpath_write(struct pdcspath_entry *entry, const char *buf, size_t coun
return -EINVAL;
/* We'll use a local copy of buf */
memset(in, 0, count+1);
count = min_t(size_t, count, sizeof(in)-1);
strncpy(in, buf, count);
in[count] = '\0';
/* Let's clean up the target. 0xff is a blank pattern */
memset(&hwpath, 0xff, sizeof(hwpath));
@ -393,14 +394,15 @@ pdcspath_layer_write(struct pdcspath_entry *entry, const char *buf, size_t count
{
unsigned int layers[6]; /* device-specific info (ctlr#, unit#, ...) */
unsigned short i;
char in[count+1], *temp;
char in[64], *temp;
if (!entry || !buf || !count)
return -EINVAL;
/* We'll use a local copy of buf */
memset(in, 0, count+1);
count = min_t(size_t, count, sizeof(in)-1);
strncpy(in, buf, count);
in[count] = '\0';
/* Let's clean up the target. 0 is a blank pattern */
memset(&layers, 0, sizeof(layers));
@ -765,7 +767,7 @@ static ssize_t pdcs_auto_write(struct kobject *kobj,
return -EINVAL;
/* We'll use a local copy of buf */
count = min_t(size_t, count, 7);
count = min_t(size_t, count, sizeof(in)-1);
strncpy(in, buf, count);
in[count] = '\0';