Messages in this thread Patch in this message | | | From | Krzysztof Kozlowski <> | Subject | [PATCH net-next] nfc: nci: fix possible NULL pointer dereference in send_acknowledge() | Date | Fri, 13 Oct 2023 20:41:29 +0200 |
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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> --- net/nfc/nci/spi.c | 2 ++ 1 file changed, 2 insertions(+)
diff --git a/net/nfc/nci/spi.c b/net/nfc/nci/spi.c index 0935527d1d12..b68150c971d0 100644 --- a/net/nfc/nci/spi.c +++ b/net/nfc/nci/spi.c @@ -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); -- 2.34.1
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