4.19-stable review patch. If anyone has any objections, please let me know.
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From: Krzysztof Kozlowski krzysztof.kozlowski@linaro.org
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: 391d8a2da787 ("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.... Signed-off-by: Jakub Kicinski kuba@kernel.org Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org --- net/nfc/nci/spi.c | 2 ++ 1 file changed, 2 insertions(+)
--- a/net/nfc/nci/spi.c +++ b/net/nfc/nci/spi.c @@ -163,6 +163,8 @@ static int send_acknowledge(struct nci_s 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);