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authorKrzysztof Kozlowski <krzysztof.kozlowski@linaro.org>2023-10-13 20:41:29 +0200
committerJakub Kicinski <kuba@kernel.org>2023-10-16 17:34:53 -0700
commit7937609cd387246aed994e81aa4fa951358fba41 (patch)
tree63070df34f7e0ad79b9e57621dabb0ae0d439b3d /net/nfc
parent503930f8e113edc86f92b767efb4ea57bdffffb2 (diff)
nfc: nci: fix possible NULL pointer dereference in send_acknowledge()
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.org Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Diffstat (limited to 'net/nfc')
-rw-r--r--net/nfc/nci/spi.c2
1 files changed, 2 insertions, 0 deletions
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);