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nfc: nci: fix possible NULL pointer dereference in send_acknowledge()

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commit 7937609cd387246aed994e81aa4fa951358fba41 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>
This commit is contained in:
Krzysztof Kozlowski 2023-10-13 20:41:29 +02:00 committed by Greg Kroah-Hartman
parent 2e64f4c732
commit c95fa5b20f
1 changed files with 2 additions and 0 deletions
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2
net/nfc/nci/spi.c
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@ -151,6 +151,8 @@ static int send_acknowledge(struct nci_spi *nspi, u8 acknowledge)
int ret;
skb = nci_skb_alloc(nspi->ndev, 0, GFP_KERNEL);
if (!skb)
return -ENOMEM;
/* add the NCI SPI header to the start of the buffer */
hdr = skb_push(skb, NCI_SPI_HDR_LEN);