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Commit 5ecf8ef9 authored by Catalin Vasile's avatar Catalin Vasile Committed by Herbert Xu
Browse files

crypto: caam - fix sg dump 



Ensure scatterlists have a virtual memory mapping before dumping.

Signed-off-by: default avatarCatalin Vasile <cata.vasile@nxp.com>
Signed-off-by: default avatarHerbert Xu <herbert@gondor.apana.org.au>
parent ad8529fd

drivers/crypto/caam/caamalg.c

+61 −18
Original line number Diff line number Diff line
@@ -111,6 +111,42 @@ 
#else

#define debug(format, arg...)

#endif



#ifdef DEBUG

#include <linux/highmem.h>



static void dbg_dump_sg(const char *level, const char *prefix_str,

			int prefix_type, int rowsize, int groupsize,

			struct scatterlist *sg, size_t tlen, bool ascii,

			bool may_sleep)

{

	struct scatterlist *it;

	void *it_page;

	size_t len;

	void *buf;



	for (it = sg; it != NULL && tlen > 0 ; it = sg_next(sg)) {

		/*

		 * make sure the scatterlist's page

		 * has a valid virtual memory mapping

		 */

		it_page = kmap_atomic(sg_page(it));

		if (unlikely(!it_page)) {

			printk(KERN_ERR "dbg_dump_sg: kmap failed\n");

			return;

		}



		buf = it_page + it->offset;

		len = min(tlen, it->length);

		print_hex_dump(level, prefix_str, prefix_type, rowsize,

			       groupsize, buf, len, ascii);

		tlen -= len;



		kunmap_atomic(it_page);

	}

}

#endif



static struct list_head alg_list;



struct caam_alg_entry {
@@ -1982,9 +2018,9 @@ static void ablkcipher_encrypt_done(struct device *jrdev, u32 *desc, u32 err, 
	print_hex_dump(KERN_ERR, "dstiv  @"__stringify(__LINE__)": ",

		       DUMP_PREFIX_ADDRESS, 16, 4, req->info,

		       edesc->src_nents > 1 ? 100 : ivsize, 1);

	print_hex_dump(KERN_ERR, "dst    @"__stringify(__LINE__)": ",

		       DUMP_PREFIX_ADDRESS, 16, 4, sg_virt(req->src),

		       edesc->dst_nents > 1 ? 100 : req->nbytes, 1);

	dbg_dump_sg(KERN_ERR, "dst    @"__stringify(__LINE__)": ",

		    DUMP_PREFIX_ADDRESS, 16, 4, req->dst,

		    edesc->dst_nents > 1 ? 100 : req->nbytes, 1, true);

#endif



	ablkcipher_unmap(jrdev, edesc, req);
@@ -2014,9 +2050,9 @@ static void ablkcipher_decrypt_done(struct device *jrdev, u32 *desc, u32 err, 
	print_hex_dump(KERN_ERR, "dstiv  @"__stringify(__LINE__)": ",

		       DUMP_PREFIX_ADDRESS, 16, 4, req->info,

		       ivsize, 1);

	print_hex_dump(KERN_ERR, "dst    @"__stringify(__LINE__)": ",

		       DUMP_PREFIX_ADDRESS, 16, 4, sg_virt(req->src),

		       edesc->dst_nents > 1 ? 100 : req->nbytes, 1);

	dbg_dump_sg(KERN_ERR, "dst    @"__stringify(__LINE__)": ",

		    DUMP_PREFIX_ADDRESS, 16, 4, req->dst,

		    edesc->dst_nents > 1 ? 100 : req->nbytes, 1, true);

#endif



	ablkcipher_unmap(jrdev, edesc, req);
@@ -2171,12 +2207,15 @@ static void init_ablkcipher_job(u32 *sh_desc, dma_addr_t ptr, 
	int len, sec4_sg_index = 0;



#ifdef DEBUG

	bool may_sleep = ((req->base.flags & (CRYPTO_TFM_REQ_MAY_BACKLOG |

					      CRYPTO_TFM_REQ_MAY_SLEEP)) != 0);

	print_hex_dump(KERN_ERR, "presciv@"__stringify(__LINE__)": ",

		       DUMP_PREFIX_ADDRESS, 16, 4, req->info,

		       ivsize, 1);

	print_hex_dump(KERN_ERR, "src    @"__stringify(__LINE__)": ",

		       DUMP_PREFIX_ADDRESS, 16, 4, sg_virt(req->src),

		       edesc->src_nents ? 100 : req->nbytes, 1);

	printk(KERN_ERR "asked=%d, nbytes%d\n", (int)edesc->src_nents ? 100 : req->nbytes, req->nbytes);

	dbg_dump_sg(KERN_ERR, "src    @"__stringify(__LINE__)": ",

		    DUMP_PREFIX_ADDRESS, 16, 4, req->src,

		    edesc->src_nents ? 100 : req->nbytes, 1, may_sleep);

#endif



	len = desc_len(sh_desc);
@@ -2228,12 +2267,14 @@ static void init_ablkcipher_giv_job(u32 *sh_desc, dma_addr_t ptr, 
	int len, sec4_sg_index = 0;



#ifdef DEBUG

	bool may_sleep = ((req->base.flags & (CRYPTO_TFM_REQ_MAY_BACKLOG |

					      CRYPTO_TFM_REQ_MAY_SLEEP)) != 0);

	print_hex_dump(KERN_ERR, "presciv@" __stringify(__LINE__) ": ",

		       DUMP_PREFIX_ADDRESS, 16, 4, req->info,

		       ivsize, 1);

	print_hex_dump(KERN_ERR, "src    @" __stringify(__LINE__) ": ",

		       DUMP_PREFIX_ADDRESS, 16, 4, sg_virt(req->src),

		       edesc->src_nents ? 100 : req->nbytes, 1);

	dbg_dump_sg(KERN_ERR, "src    @" __stringify(__LINE__) ": ",

		    DUMP_PREFIX_ADDRESS, 16, 4, req->src,

		    edesc->src_nents ? 100 : req->nbytes, 1, may_sleep);

#endif



	len = desc_len(sh_desc);
@@ -2503,18 +2544,20 @@ static int aead_decrypt(struct aead_request *req) 
	u32 *desc;

	int ret = 0;



#ifdef DEBUG

	bool may_sleep = ((req->base.flags & (CRYPTO_TFM_REQ_MAY_BACKLOG |

					      CRYPTO_TFM_REQ_MAY_SLEEP)) != 0);

	dbg_dump_sg(KERN_ERR, "dec src@"__stringify(__LINE__)": ",

		    DUMP_PREFIX_ADDRESS, 16, 4, req->src,

		    req->assoclen + req->cryptlen, 1, may_sleep);

#endif



	/* allocate extended descriptor */

	edesc = aead_edesc_alloc(req, AUTHENC_DESC_JOB_IO_LEN,

				 &all_contig, false);

	if (IS_ERR(edesc))

		return PTR_ERR(edesc);



#ifdef DEBUG

	print_hex_dump(KERN_ERR, "dec src@"__stringify(__LINE__)": ",

		       DUMP_PREFIX_ADDRESS, 16, 4, sg_virt(req->src),

		       req->assoclen + req->cryptlen, 1);

#endif



	/* Create and submit job descriptor*/

	init_authenc_job(req, edesc, all_contig, false);

#ifdef DEBUG