mirror of
https://github.com/torvalds/linux
synced 2024-09-06 18:01:05 +00:00
ALSA: control-led: use strscpy in set_led_id()
The use of strncpy() in the set_led_id() was incorrect.
The len variable should use 'min(sizeof(buf2) - 1, count)'
expression.
Use strscpy() function to simplify things and handle the error gracefully.
Fixes: a135dfb5de
("ALSA: led control - add sysfs kcontrol LED marking layer")
Reported-by: yang.yang29@zte.com.cn
Link: https://lore.kernel.org/alsa-devel/202301091945513559977@zte.com.cn/
Cc: <stable@vger.kernel.org>
Signed-off-by: Jaroslav Kysela <perex@perex.cz>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
This commit is contained in:
parent
291e9da914
commit
70051cffb3
|
@ -530,12 +530,11 @@ static ssize_t set_led_id(struct snd_ctl_led_card *led_card, const char *buf, si
|
|||
bool attach)
|
||||
{
|
||||
char buf2[256], *s, *os;
|
||||
size_t len = max(sizeof(s) - 1, count);
|
||||
struct snd_ctl_elem_id id;
|
||||
int err;
|
||||
|
||||
strncpy(buf2, buf, len);
|
||||
buf2[len] = '\0';
|
||||
if (strscpy(buf2, buf, sizeof(buf2)) < 0)
|
||||
return -E2BIG;
|
||||
memset(&id, 0, sizeof(id));
|
||||
id.iface = SNDRV_CTL_ELEM_IFACE_MIXER;
|
||||
s = buf2;
|
||||
|
|
Loading…
Reference in a new issue