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staging: most: core: Use scnprintf() for avoiding potential buffer overflow

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Since snprintf() returns the would-be-output size instead of the
actual output size, the succeeding calls may go beyond the given
buffer limit.  Fix it by replacing with scnprintf().

Signed-off-by: Takashi Iwai <tiwai@suse.de>
Link: https://lore.kernel.org/r/20200311091944.23185-1-tiwai@suse.de
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Takashi Iwai
2020-03-11 10:19:44 +01:00
committed by Greg Kroah-Hartman
parent 1693a2fa4b
commit 234ff54287
1 changed files with 3 additions and 3 deletions
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6
drivers/staging/most/core.c
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@@ -472,7 +472,7 @@ static int print_links(struct device *dev, void *data)
list_for_each_entry(c, &iface->p->channel_list, list) {
if (c->pipe0.comp) {
offs += snprintf(buf + offs,
offs += scnprintf(buf + offs,
PAGE_SIZE - offs,
"%s:%s:%s\n",
c->pipe0.comp->name,
@@ -480,7 +480,7 @@ static int print_links(struct device *dev, void *data)
dev_name(&c->dev));
}
if (c->pipe1.comp) {
offs += snprintf(buf + offs,
offs += scnprintf(buf + offs,
PAGE_SIZE - offs,
"%s:%s:%s\n",
c->pipe1.comp->name,
@@ -519,7 +519,7 @@ static ssize_t components_show(struct device_driver *drv, char *buf)
int offs = 0;
list_for_each_entry(comp, &comp_list, list) {
offs += snprintf(buf + offs, PAGE_SIZE - offs, "%s\n",
offs += scnprintf(buf + offs, PAGE_SIZE - offs, "%s\n",
comp->name);
}
return offs;