Merge tag 'v6.3-p2' of git://git.kernel.org/pub/scm/linux/kernel/git/herbert/crypto-2.6

Pull crypto fix from Herbert Xu: "Fix a regression in the caam driver" * tag 'v6.3-p2' of git://git.kernel.org/pub/scm/linux/kernel/git/herbert/crypto-2.6: crypto: caam - Fix edesc/iv ordering mixup
2025-07-22 20:30:58 +02:00 · 2023-03-05 11:32:30 -08:00
parent 7f9ec7d816 660ca9470f
commit f915322fe0
3 changed files with 53 additions and 23 deletions
--- a/drivers/crypto/caam/caamalg.c
+++ b/drivers/crypto/caam/caamalg.c
@@ -60,7 +60,11 @@
 #include <crypto/xts.h>
 #include <asm/unaligned.h>
 #include <linux/dma-mapping.h>
+#include <linux/device.h>
+#include <linux/err.h>
 #include <linux/kernel.h>
+#include <linux/slab.h>
+#include <linux/string.h>

 /*
 * crypto alg
@@ -1000,6 +1004,13 @@ static void aead_crypt_done(struct device *jrdev, u32 *desc, u32 err,
 		crypto_finalize_aead_request(jrp->engine, req, ecode);
 }

+static inline u8 *skcipher_edesc_iv(struct skcipher_edesc *edesc)
+{
+
+	return PTR_ALIGN((u8 *)edesc->sec4_sg + edesc->sec4_sg_bytes,
+			 dma_get_cache_alignment());
+}
+
 static void skcipher_crypt_done(struct device *jrdev, u32 *desc, u32 err,
 				void *context)
 {
@@ -1027,8 +1038,7 @@ static void skcipher_crypt_done(struct device *jrdev, u32 *desc, u32 err,
 	 * This is used e.g. by the CTS mode.
 	 */
 	if (ivsize && !ecode) {
-		memcpy(req->iv, (u8 *)edesc->sec4_sg + edesc->sec4_sg_bytes,
-		       ivsize);
+		memcpy(req->iv, skcipher_edesc_iv(edesc), ivsize);

 		print_hex_dump_debug("dstiv  @" __stringify(__LINE__)": ",
 				     DUMP_PREFIX_ADDRESS, 16, 4, req->iv,
@@ -1683,18 +1693,19 @@ static struct skcipher_edesc *skcipher_edesc_alloc(struct skcipher_request *req,
 	/*
 	 * allocate space for base edesc and hw desc commands, link tables, IV
 	 */
-	aligned_size = ALIGN(ivsize, __alignof__(*edesc));
-	aligned_size += sizeof(*edesc) + desc_bytes + sec4_sg_bytes;
+	aligned_size = sizeof(*edesc) + desc_bytes + sec4_sg_bytes;
 	aligned_size = ALIGN(aligned_size, dma_get_cache_alignment());
-	iv = kzalloc(aligned_size, flags);
-	if (!iv) {
+	aligned_size += ~(ARCH_KMALLOC_MINALIGN - 1) &
+			(dma_get_cache_alignment() - 1);
+	aligned_size += ALIGN(ivsize, dma_get_cache_alignment());
+	edesc = kzalloc(aligned_size, flags);
+	if (!edesc) {
 		dev_err(jrdev, "could not allocate extended descriptor\n");
 		caam_unmap(jrdev, req->src, req->dst, src_nents, dst_nents, 0,
 			   0, 0, 0);
 		return ERR_PTR(-ENOMEM);
 	}

-	edesc = (void *)(iv + ALIGN(ivsize, __alignof__(*edesc)));
 	edesc->src_nents = src_nents;
 	edesc->dst_nents = dst_nents;
 	edesc->mapped_src_nents = mapped_src_nents;
@@ -1706,6 +1717,7 @@ static struct skcipher_edesc *skcipher_edesc_alloc(struct skcipher_request *req,

 	/* Make sure IV is located in a DMAable area */
 	if (ivsize) {
+		iv = skcipher_edesc_iv(edesc);
 		memcpy(iv, req->iv, ivsize);

 		iv_dma = dma_map_single(jrdev, iv, ivsize, DMA_BIDIRECTIONAL);
--- a/drivers/crypto/caam/caamalg_qi.c
+++ b/drivers/crypto/caam/caamalg_qi.c
@@ -20,8 +20,11 @@
 #include "caamalg_desc.h"
 #include <crypto/xts.h>
 #include <asm/unaligned.h>
+#include <linux/device.h>
+#include <linux/err.h>
 #include <linux/dma-mapping.h>
 #include <linux/kernel.h>
+#include <linux/string.h>

 /*
 * crypto alg
@@ -1204,6 +1207,12 @@ static int ipsec_gcm_decrypt(struct aead_request *req)
 					   false);
 }

+static inline u8 *skcipher_edesc_iv(struct skcipher_edesc *edesc)
+{
+	return PTR_ALIGN((u8 *)&edesc->sgt[0] + edesc->qm_sg_bytes,
+			 dma_get_cache_alignment());
+}
+
 static void skcipher_done(struct caam_drv_req *drv_req, u32 status)
 {
 	struct skcipher_edesc *edesc;
@@ -1236,8 +1245,7 @@ static void skcipher_done(struct caam_drv_req *drv_req, u32 status)
 	 * This is used e.g. by the CTS mode.
 	 */
 	if (!ecode)
-		memcpy(req->iv, (u8 *)&edesc->sgt[0] + edesc->qm_sg_bytes,
-		       ivsize);
+		memcpy(req->iv, skcipher_edesc_iv(edesc), ivsize);

 	qi_cache_free(edesc);
 	skcipher_request_complete(req, ecode);
@@ -1259,6 +1267,7 @@ static struct skcipher_edesc *skcipher_edesc_alloc(struct skcipher_request *req,
 	int dst_sg_idx, qm_sg_ents, qm_sg_bytes;
 	struct qm_sg_entry *sg_table, *fd_sgt;
 	struct caam_drv_ctx *drv_ctx;
+	unsigned int len;

 	drv_ctx = get_drv_ctx(ctx, encrypt ? ENCRYPT : DECRYPT);
 	if (IS_ERR(drv_ctx))
@@ -1319,9 +1328,12 @@ static struct skcipher_edesc *skcipher_edesc_alloc(struct skcipher_request *req,
 		qm_sg_ents = 1 + pad_sg_nents(qm_sg_ents);

 	qm_sg_bytes = qm_sg_ents * sizeof(struct qm_sg_entry);
-	if (unlikely(ALIGN(ivsize, __alignof__(*edesc)) +
-		     offsetof(struct skcipher_edesc, sgt) + qm_sg_bytes >
-		     CAAM_QI_MEMCACHE_SIZE)) {
+
+	len = offsetof(struct skcipher_edesc, sgt) + qm_sg_bytes;
+	len = ALIGN(len, dma_get_cache_alignment());
+	len += ivsize;
+
+	if (unlikely(len > CAAM_QI_MEMCACHE_SIZE)) {
 		dev_err(qidev, "No space for %d S/G entries and/or %dB IV\n",
 			qm_sg_ents, ivsize);
 		caam_unmap(qidev, req->src, req->dst, src_nents, dst_nents, 0,
@@ -1330,18 +1342,24 @@ static struct skcipher_edesc *skcipher_edesc_alloc(struct skcipher_request *req,
 	}

 	/* allocate space for base edesc, link tables and IV */
-	iv = qi_cache_alloc(flags);
-	if (unlikely(!iv)) {
+	edesc = qi_cache_alloc(flags);
+	if (unlikely(!edesc)) {
 		dev_err(qidev, "could not allocate extended descriptor\n");
 		caam_unmap(qidev, req->src, req->dst, src_nents, dst_nents, 0,
 			   0, DMA_NONE, 0, 0);
 		return ERR_PTR(-ENOMEM);
 	}

-	edesc = (void *)(iv + ALIGN(ivsize, __alignof__(*edesc)));
+	edesc->src_nents = src_nents;
+	edesc->dst_nents = dst_nents;
+	edesc->qm_sg_bytes = qm_sg_bytes;
+	edesc->drv_req.app_ctx = req;
+	edesc->drv_req.cbk = skcipher_done;
+	edesc->drv_req.drv_ctx = drv_ctx;

 	/* Make sure IV is located in a DMAable area */
 	sg_table = &edesc->sgt[0];
+	iv = skcipher_edesc_iv(edesc);
 	memcpy(iv, req->iv, ivsize);

 	iv_dma = dma_map_single(qidev, iv, ivsize, DMA_BIDIRECTIONAL);
@@ -1353,13 +1371,7 @@ static struct skcipher_edesc *skcipher_edesc_alloc(struct skcipher_request *req,
 		return ERR_PTR(-ENOMEM);
 	}

-	edesc->src_nents = src_nents;
-	edesc->dst_nents = dst_nents;
 	edesc->iv_dma = iv_dma;
-	edesc->qm_sg_bytes = qm_sg_bytes;
-	edesc->drv_req.app_ctx = req;
-	edesc->drv_req.cbk = skcipher_done;
-	edesc->drv_req.drv_ctx = drv_ctx;

 	dma_to_qm_sg_one(sg_table, iv_dma, ivsize, 0);
 	sg_to_qm_sg(req->src, req->cryptlen, sg_table + 1, 0);
--- a/drivers/crypto/caam/qi.c
+++ b/drivers/crypto/caam/qi.c
@@ -8,7 +8,13 @@
 */

 #include <linux/cpumask.h>
+#include <linux/device.h>
+#include <linux/dma-mapping.h>
+#include <linux/kernel.h>
 #include <linux/kthread.h>
+#include <linux/netdevice.h>
+#include <linux/slab.h>
+#include <linux/string.h>
 #include <soc/fsl/qman.h>

 #include "debugfs.h"
@@ -755,8 +761,8 @@ int caam_qi_init(struct platform_device *caam_pdev)
 		napi_enable(irqtask);
 	}

-	qi_cache = kmem_cache_create("caamqicache", CAAM_QI_MEMCACHE_SIZE, 0,
-				     0, NULL);
+	qi_cache = kmem_cache_create("caamqicache", CAAM_QI_MEMCACHE_SIZE,
+				     dma_get_cache_alignment(), 0, NULL);
 	if (!qi_cache) {
 		dev_err(qidev, "Can't allocate CAAM cache\n");
 		free_rsp_fqs();