Commit 513e1cbd authored by Neil Horman's avatar Neil Horman Committed by Greg Kroah-Hartman
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staging: unisys: Linarize skbs 



If we can't fit an skb into a frag array, linaraize it so we don't have to

Signed-off-by: default avatarNeil Horman <nhorman@redhat.com>
Signed-off-by: default avatarBenjamin Romer <benjamin.romer@unisys.com>
Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
parent 998ff7f8

drivers/staging/unisys/visornic/visornic_main.c

+16 −0
Original line number Diff line number Diff line
@@ -221,9 +221,25 @@ visor_copy_fragsinfo_from_skb(struct sk_buff *skb, unsigned int firstfraglen, 
			      struct phys_info frags[])

{

	unsigned int count = 0, ii, size, offset = 0, numfrags;

	unsigned int total_count;



	numfrags = skb_shinfo(skb)->nr_frags;



	/*

	 * Compute the number of fragments this skb has, and if its more than

	 * frag array can hold, linearize the skb

	 */

	total_count = numfrags + (firstfraglen / PI_PAGE_SIZE);

	if (firstfraglen % PI_PAGE_SIZE)

		total_count++;



	if (total_count > frags_max) {

		if (skb_linearize(skb))

			return -EINVAL;

		numfrags = skb_shinfo(skb)->nr_frags;

		firstfraglen = 0;

	}



	while (firstfraglen) {

		if (count == frags_max)

			return -EINVAL;