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| author | Al Viro <viro@www.linux.org.uk> | 2005-04-03 09:15:52 +0100 |
|---|---|---|
| committer | Jeff Garzik <jgarzik@pobox.com> | 2005-05-27 22:15:13 -0400 |
| commit | 695b5bc3ecfc7da0a29360a6c2ee0849ffdb300a (patch) | |
| tree | 5c6d8a4a44acccb6f9685b8d601d4b24357fb130 /net/ieee80211 | |
| parent | ff0e0ea2f5d36fa90fc2c57fd019102b0a0cfabf (diff) | |
| download | op-kernel-dev-695b5bc3ecfc7da0a29360a6c2ee0849ffdb300a.zip op-kernel-dev-695b5bc3ecfc7da0a29360a6c2ee0849ffdb300a.tar.gz | |
[PATCH] ieee80211_module.c::store_debug_level() cleanup
* trivial __user annotations
* store_debug_level() sanitized a bit
Signed-off-by: Al Viro <viro@parcelfarce.linux.theplanet.co.uk>
Diffstat (limited to 'net/ieee80211')
| -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 e4ca0da..90bc50b9 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) |
