From d5a461c315e5ff92657f84d8ba50caa5abf5c22a Mon Sep 17 00:00:00 2001 From: Dan Carpenter Date: Fri, 17 Jan 2025 12:38:41 +0300 Subject: [PATCH] NFC: nci: Add bounds checking in nci_hci_create_pipe() commit 110b43ef05342d5a11284cc8b21582b698b4ef1c upstream. The "pipe" variable is a u8 which comes from the network. If it's more than 127, then it results in memory corruption in the caller, nci_hci_connect_gate(). Cc: stable@vger.kernel.org Fixes: a1b0b9415817 ("NFC: nci: Create pipe on specific gate in nci_hci_connect_gate") Signed-off-by: Dan Carpenter Reviewed-by: Simon Horman Reviewed-by: Krzysztof Kozlowski Link: https://patch.msgid.link/bcf5453b-7204-4297-9c20-4d8c7dacf586@stanley.mountain Signed-off-by: Jakub Kicinski Signed-off-by: Greg Kroah-Hartman --- net/nfc/nci/hci.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/net/nfc/nci/hci.c b/net/nfc/nci/hci.c index 78c4b6addf15..1057d5347e55 100644 --- a/net/nfc/nci/hci.c +++ b/net/nfc/nci/hci.c @@ -540,6 +540,8 @@ static u8 nci_hci_create_pipe(struct nci_dev *ndev, u8 dest_host, pr_debug("pipe created=%d\n", pipe); + if (pipe >= NCI_HCI_MAX_PIPES) + pipe = NCI_HCI_INVALID_PIPE; return pipe; }