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Commit 1e3cbe4c authored by Linus Torvalds's avatar Linus Torvalds
Browse files

Merge git://git.kernel.org/pub/scm/linux/kernel/git/herbert/crypto-2.6 

* git://git.kernel.org/pub/scm/linux/kernel/git/herbert/crypto-2.6:
  [CRYPTO] blkcipher: Fix inverted test in blkcipher_get_spot
  [CRYPTO] blkcipher: Fix handling of kmalloc page straddling
parents e032d93e 32528d0f

crypto/blkcipher.c

+7 −4
Original line number Diff line number Diff line
@@ -59,11 +59,13 @@ static inline void blkcipher_unmap_dst(struct blkcipher_walk *walk) 
	scatterwalk_unmap(walk->dst.virt.addr, 1);

}



/* Get a spot of the specified length that does not straddle a page.

 * The caller needs to ensure that there is enough space for this operation.

 */

static inline u8 *blkcipher_get_spot(u8 *start, unsigned int len)

{

	if (offset_in_page(start + len) < len)

		return (u8 *)((unsigned long)(start + len) & PAGE_MASK);

	return start;

	u8 *end_page = (u8 *)(((unsigned long)(start + len - 1)) & PAGE_MASK);

	return start > end_page ? start : end_page;

}



static inline unsigned int blkcipher_done_slow(struct crypto_blkcipher *tfm,
@@ -155,7 +157,8 @@ static inline int blkcipher_next_slow(struct blkcipher_desc *desc, 
	if (walk->buffer)

		goto ok;



	n = bsize * 2 + (alignmask & ~(crypto_tfm_ctx_alignment() - 1));

	n = bsize * 3 - (alignmask + 1) +

	    (alignmask & ~(crypto_tfm_ctx_alignment() - 1));

	walk->buffer = kmalloc(n, GFP_ATOMIC);

	if (!walk->buffer)

		return blkcipher_walk_done(desc, walk, -ENOMEM);