| Message ID | 20200205051842.29324-3-ayush.sawal@chelsio.com (mailing list archive) |
|---|---|
| State | Accepted |
| Delegated to: | Herbert Xu |
| Headers | show |
| Series | Bug fixes for libkcapi's fail tests | expand |
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 {
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> --- drivers/crypto/chelsio/chcr_algo.c | 5 +++-- 1 file changed, 3 insertions(+), 2 deletions(-)