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Add explicit checks after each sg_nents_for_len() call in DTHEv2 AES driver. Fixes: 52f641bc63a46 ("crypto: ti - Add driver for DTHE V2 AES Engine (ECB, CBC)") Signed-off-by: T Pratham --- drivers/crypto/ti/dthev2-aes.c | 6 ++++++ 1 file changed, 6 insertions(+) diff --git a/drivers/crypto/ti/dthev2-aes.c b/drivers/crypto/ti/dthev2-aes.c index ef053264a5541..beaaca862f39d 100644 --- a/drivers/crypto/ti/dthev2-aes.c +++ b/drivers/crypto/ti/dthev2-aes.c @@ -354,6 +354,11 @@ static int dthe_aes_run(struct crypto_engine *engine, void *areq) u32 aes_irqenable_val = readl_relaxed(aes_base_reg + DTHE_P_AES_IRQENABLE); u32 aes_sysconfig_val = readl_relaxed(aes_base_reg + DTHE_P_AES_SYSCONFIG); + if (src_nents < 0 || dst_nents < 0) { + ret = -EINVAL; + goto aes_inval_nent_err; + } + aes_sysconfig_val |= DTHE_AES_SYSCONFIG_DMA_DATA_IN_OUT_EN; writel_relaxed(aes_sysconfig_val, aes_base_reg + DTHE_P_AES_SYSCONFIG); @@ -512,6 +517,7 @@ static int dthe_aes_run(struct crypto_engine *engine, void *areq) if (ret == -ENOMEM) ret = dthe_aes_do_fallback(req); +aes_inval_nent_err: local_bh_disable(); crypto_finalize_skcipher_request(dev_data->engine, req, ret); local_bh_enable(); -- 2.34.1