diff options
Diffstat (limited to 'net/ieee80211/ieee80211_module.c')
| -rw-r--r-- | net/ieee80211/ieee80211_module.c | 16 |
1 files changed, 11 insertions, 5 deletions
diff --git a/net/ieee80211/ieee80211_module.c b/net/ieee80211/ieee80211_module.c index e4ca0daaaee..90bc50b97ea 100644 --- a/net/ieee80211/ieee80211_module.c +++ b/net/ieee80211/ieee80211_module.c @@ -194,17 +194,23 @@ static int show_debug_level(char *page, char **start, off_t offset, return snprintf(page, count, "0x%08X\n", ieee80211_debug_level); } -static int store_debug_level(struct file *file, const char *buffer, +static int store_debug_level(struct file *file, const char __user *buffer, unsigned long count, void *data) { char buf[] = "0x00000000"; - unsigned long len = min(sizeof(buf) - 1, (u32)count); char *p = (char *)buf; unsigned long val; - if (copy_from_user(buf, buffer, len)) + if (count > sizeof(buf) - 1) + count = sizeof(buf) - 1; + + if (copy_from_user(buf, buffer, count)) return count; - buf[len] = 0; + buf[count] = 0; + /* + * what a FPOS... What, sscanf(buf, "%i", &val) would be too + * scary? + */ if (p[1] == 'x' || p[1] == 'X' || p[0] == 'x' || p[0] == 'X') { p++; if (p[0] == 'x' || p[0] == 'X') @@ -218,7 +224,7 @@ static int store_debug_level(struct file *file, const char *buffer, else ieee80211_debug_level = val; - return strnlen(buf, count); + return strlen(buf); } static int __init ieee80211_init(void) |