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nfc: nci: fix possible NULL pointer dereference in send_acknowledge()
commit7937609cd3
upstream. Handle memory allocation failure from nci_skb_alloc() (calling alloc_skb()) to avoid possible NULL pointer dereference. Reported-by: 黄思聪 <huangsicong@iie.ac.cn> Fixes:391d8a2da7
("NFC: Add NCI over SPI receive") Cc: <stable@vger.kernel.org> Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org> Reviewed-by: Simon Horman <horms@kernel.org> Link: https://lore.kernel.org/r/20231013184129.18738-1-krzysztof.kozlowski@linaro.org Signed-off-by: Jakub Kicinski <kuba@kernel.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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@ -151,6 +151,8 @@ static int send_acknowledge(struct nci_spi *nspi, u8 acknowledge)
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int ret;
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skb = nci_skb_alloc(nspi->ndev, 0, GFP_KERNEL);
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if (!skb)
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return -ENOMEM;
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/* add the NCI SPI header to the start of the buffer */
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hdr = skb_push(skb, NCI_SPI_HDR_LEN);
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