diff options
Diffstat (limited to 'drivers/usb/gadget/function/uvc_configfs.c')
| -rw-r--r-- | drivers/usb/gadget/function/uvc_configfs.c | 18 |
1 files changed, 15 insertions, 3 deletions
diff --git a/drivers/usb/gadget/function/uvc_configfs.c b/drivers/usb/gadget/function/uvc_configfs.c index 7e704b2bcfd1ce..6fac696ea84637 100644 --- a/drivers/usb/gadget/function/uvc_configfs.c +++ b/drivers/usb/gadget/function/uvc_configfs.c @@ -13,6 +13,7 @@ #include "uvc_configfs.h" #include <linux/sort.h> +#include <linux/usb/uvc.h> #include <linux/usb/video.h> /* ----------------------------------------------------------------------------- @@ -92,10 +93,10 @@ static int __uvcg_iter_item_entries(const char *page, size_t len, while (pg - page < len) { i = 0; - while (i < sizeof(buf) && (pg - page < len) && + while (i < bufsize && (pg - page < len) && *pg != '\0' && *pg != '\n') buf[i++] = *pg++; - if (i == sizeof(buf)) { + if (i == bufsize) { ret = -EINVAL; goto out_free_buf; } @@ -2260,6 +2261,8 @@ static ssize_t uvcg_uncompressed_guid_format_store(struct config_item *item, struct f_uvc_opts *opts; struct config_item *opts_item; struct mutex *su_mutex = &ch->fmt.group.cg_subsys->su_mutex; + const struct uvc_format_desc *format; + u8 tmpguidFormat[sizeof(ch->desc.guidFormat)]; int ret; mutex_lock(su_mutex); /* for navigating configfs hierarchy */ @@ -2273,7 +2276,16 @@ static ssize_t uvcg_uncompressed_guid_format_store(struct config_item *item, goto end; } - memcpy(ch->desc.guidFormat, page, + memcpy(tmpguidFormat, page, + min(sizeof(tmpguidFormat), len)); + + format = uvc_format_by_guid(tmpguidFormat); + if (!format) { + ret = -EINVAL; + goto end; + } + + memcpy(ch->desc.guidFormat, tmpguidFormat, min(sizeof(ch->desc.guidFormat), len)); ret = sizeof(ch->desc.guidFormat); |