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authorAyush Sawal <ayush.sawal@chelsio.com>2020-02-05 08:18:42 +0300
committerHerbert Xu <herbert@gondor.apana.org.au>2020-02-13 12:05:26 +0300
commit9195189e00a7db55e7d448cee973cae87c5a3c71 (patch)
treea2b9490488920840200b978d7ae2f086b8437003 /drivers/crypto/chelsio/chcr_algo.c
parent1c502e2e2d79b6a4c800c3806c70b58ad6ae784d (diff)
downloadlinux-9195189e00a7db55e7d448cee973cae87c5a3c71.tar.xz
crypto: chelsio - This fixes the kernel panic which occurs during a libkcapi test
The libkcapi test which causes kernel panic is aead asynchronous vmsplice multiple test. ./bin/kcapi -v -d 4 -x 10 -c "ccm(aes)" -q 4edb58e8d5eb6bc711c43a6f3693daebde2e5524f1b55297abb29f003236e43d -t a7877c99 -n 674742abd0f5ba -k 2861fd0253705d7875c95ba8a53171b4 -a fb7bc304a3909e66e2e0c5ef952712dd884ce3e7324171369f2c5db1adc48c7d This patch avoids dma_mapping of a zero length sg which causes the panic, by using sg_nents_for_len which maps only upto a specific length Signed-off-by: Ayush Sawal <ayush.sawal@chelsio.com> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Diffstat (limited to 'drivers/crypto/chelsio/chcr_algo.c')
-rw-r--r--drivers/crypto/chelsio/chcr_algo.c5
1 files changed, 3 insertions, 2 deletions
diff --git a/drivers/crypto/chelsio/chcr_algo.c b/drivers/crypto/chelsio/chcr_algo.c
index 699e3053895a..02b0ddb785a4 100644
--- a/drivers/crypto/chelsio/chcr_algo.c
+++ b/drivers/crypto/chelsio/chcr_algo.c
@@ -2489,8 +2489,9 @@ int chcr_aead_dma_map(struct device *dev,
else
reqctx->b0_dma = 0;
if (req->src == req->dst) {
- error = dma_map_sg(dev, req->src, sg_nents(req->src),
- DMA_BIDIRECTIONAL);
+ error = dma_map_sg(dev, req->src,
+ sg_nents_for_len(req->src, dst_size),
+ DMA_BIDIRECTIONAL);
if (!error)
goto err;
} else {