[PATCH v2] crypto: talitos - fix ablkcipher for CONFIG_VMAP_STACK
From: Christophe Leroy
Date: Thu Dec 13 2018 - 02:34:46 EST
[ 2.364486] WARNING: CPU: 0 PID: 60 at ./arch/powerpc/include/asm/io.h:837 dma_nommu_map_page+0x44/0xd4
[ 2.373579] CPU: 0 PID: 60 Comm: cryptomgr_test Tainted: G W 4.20.0-rc5-00560-g6bfb52e23a00-dirty #531
[ 2.384740] NIP: c000c540 LR: c000c584 CTR: 00000000
[ 2.389743] REGS: c95abab0 TRAP: 0700 Tainted: G W (4.20.0-rc5-00560-g6bfb52e23a00-dirty)
[ 2.400042] MSR: 00029032 <EE,ME,IR,DR,RI> CR: 24042204 XER: 00000000
[ 2.406669]
[ 2.406669] GPR00: c02f2244 c95abb60 c6262990 c95abd80 0000256a 00000001 00000001 00000001
[ 2.406669] GPR08: 00000000 00002000 00000010 00000010 24042202 00000000 00000100 c95abd88
[ 2.406669] GPR16: 00000000 c05569d4 00000001 00000010 c95abc88 c0615664 00000004 00000000
[ 2.406669] GPR24: 00000010 c95abc88 c95abc88 00000000 c61ae210 c7ff6d40 c61ae210 00003d68
[ 2.441559] NIP [c000c540] dma_nommu_map_page+0x44/0xd4
[ 2.446720] LR [c000c584] dma_nommu_map_page+0x88/0xd4
[ 2.451762] Call Trace:
[ 2.454195] [c95abb60] [82000808] 0x82000808 (unreliable)
[ 2.459572] [c95abb80] [c02f2244] talitos_edesc_alloc+0xbc/0x3c8
[ 2.465493] [c95abbb0] [c02f2600] ablkcipher_edesc_alloc+0x4c/0x5c
[ 2.471606] [c95abbd0] [c02f4ed0] ablkcipher_encrypt+0x20/0x64
[ 2.477389] [c95abbe0] [c02023b0] __test_skcipher+0x4bc/0xa08
[ 2.483049] [c95abe00] [c0204b60] test_skcipher+0x2c/0xcc
[ 2.488385] [c95abe20] [c0204c48] alg_test_skcipher+0x48/0xbc
[ 2.494064] [c95abe40] [c0205cec] alg_test+0x164/0x2e8
[ 2.499142] [c95abf00] [c0200dec] cryptomgr_test+0x48/0x50
[ 2.504558] [c95abf10] [c0039ff4] kthread+0xe4/0x110
[ 2.509471] [c95abf40] [c000e1d0] ret_from_kernel_thread+0x14/0x1c
[ 2.515532] Instruction dump:
[ 2.518468] 7c7e1b78 7c9d2378 7cbf2b78 41820054 3d20c076 8089c200 3d20c076 7c84e850
[ 2.526127] 8129c204 7c842e70 7f844840 419c0008 <0fe00000> 2f9e0000 54847022 7c84fa14
[ 2.533960] ---[ end trace bf78d94af73fe3b8 ]---
[ 2.539123] talitos ff020000.crypto: master data transfer error
[ 2.544775] talitos ff020000.crypto: TEA error: ISR 0x20000000_00000040
[ 2.551625] alg: skcipher: encryption failed on test 1 for ecb-aes-talitos: ret=22
IV cannot be on stack when CONFIG_VMAP_STACK is selected because the stack
cannot be DMA mapped anymore.
This patch copies the IV from areq->info into the request context.
Fixes: 4de9d0b547b9 ("crypto: talitos - Add ablkcipher algorithms")
Cc: stable@xxxxxxxxxxxxxxx
Signed-off-by: Christophe Leroy <christophe.leroy@xxxxxx>
---
v2: Using per-request context.
drivers/crypto/talitos.c | 15 +++++++++++++--
1 file changed, 13 insertions(+), 2 deletions(-)
diff --git a/drivers/crypto/talitos.c b/drivers/crypto/talitos.c
index 6988012deca4..df289758755c 100644
--- a/drivers/crypto/talitos.c
+++ b/drivers/crypto/talitos.c
@@ -1664,12 +1664,16 @@ static int common_nonsnoop(struct talitos_edesc *edesc,
static struct talitos_edesc *ablkcipher_edesc_alloc(struct ablkcipher_request *
areq, bool encrypt)
{
+ void *req_ctx = ablkcipher_request_ctx(areq);
struct crypto_ablkcipher *cipher = crypto_ablkcipher_reqtfm(areq);
struct talitos_ctx *ctx = crypto_ablkcipher_ctx(cipher);
unsigned int ivsize = crypto_ablkcipher_ivsize(cipher);
+ if (ivsize)
+ memcpy(req_ctx, areq->info, ivsize);
+
return talitos_edesc_alloc(ctx->dev, areq->src, areq->dst,
- areq->info, 0, areq->nbytes, 0, ivsize, 0,
+ req_ctx, 0, areq->nbytes, 0, ivsize, 0,
areq->base.flags, encrypt);
}
@@ -3066,6 +3070,13 @@ static int talitos_cra_init_ahash(struct crypto_tfm *tfm)
return 0;
}
+static int talitos_cra_init_ablkcipher(struct crypto_tfm *tfm)
+{
+ tfm->crt_ablkcipher.reqsize = TALITOS_MAX_IV_LENGTH;
+
+ return talitos_cra_init(tfm);
+}
+
static void talitos_cra_exit(struct crypto_tfm *tfm)
{
struct talitos_ctx *ctx = crypto_tfm_ctx(tfm);
@@ -3149,7 +3160,7 @@ static struct talitos_crypto_alg *talitos_alg_alloc(struct device *dev,
switch (t_alg->algt.type) {
case CRYPTO_ALG_TYPE_ABLKCIPHER:
alg = &t_alg->algt.alg.crypto;
- alg->cra_init = talitos_cra_init;
+ alg->cra_init = talitos_cra_init_ablkcipher;
alg->cra_exit = talitos_cra_exit;
alg->cra_type = &crypto_ablkcipher_type;
alg->cra_ablkcipher.setkey = ablkcipher_setkey;
--
2.13.3