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batman-adv: Directly check read of icmp packet in copy_from_user 

The access_ok read check can be directly done in copy_from_user since a failure
of access_ok is handled the same way as an error in __copy_from_user.

Signed-off-by: Sven Eckelmann <sven@narfation.org>
Signed-off-by: Marek Lindner <lindner_marek@yahoo.de>
This commit is contained in:
Sven Eckelmann 2011-12-10 15:28:35 +01:00 committed by Marek Lindner
parent c00b6856fc
commit d18eb45332
1 changed files with 1 additions and 6 deletions
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7
net/batman-adv/icmp_socket.c
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@ -187,12 +187,7 @@ static ssize_t bat_socket_write(struct file *file, const char __user *buff,
skb_reserve(skb, sizeof(struct ethhdr));
icmp_packet = (struct icmp_packet_rr *)skb_put(skb, packet_len);
if (!access_ok(VERIFY_READ, buff, packet_len)) {
len = -EFAULT;
goto free_skb;
}
if (__copy_from_user(icmp_packet, buff, packet_len)) {
if (copy_from_user(icmp_packet, buff, packet_len)) {
len = -EFAULT;
goto free_skb;
}