linux-kernel - Re: [PATCH net] nfc: nci: Fix uninit-value in nci_dev

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Message-ID: <000000000000f90e5a06137776f9@google.com>
Date: Tue, 12 Mar 2024 07:27:58 -0700
From: syzbot <syzbot+7ea9413ea6749baf5574@...kaller.appspotmail.com>
To: ryasuoka@...hat.com
Cc: ryasuoka@...hat.com, syzkaller-bugs@...glegroups.com, 
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH net] nfc: nci: Fix uninit-value in nci_dev_up

> #syz test: git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git

want either no args or 2 args (repo, branch), got 5

>
> diff --git a/net/nfc/nci/ntf.c b/net/nfc/nci/ntf.c
> index 994a0a1efb58..56624387e253 100644
> --- a/net/nfc/nci/ntf.c
> +++ b/net/nfc/nci/ntf.c
> @@ -765,6 +765,9 @@ void nci_ntf_packet(struct nci_dev *ndev, struct sk_buff *skb)
>  		 nci_opcode_oid(ntf_opcode),
>  		 nci_plen(skb->data));
>  
> +	if (!nci_plen(skb->data))
> +		goto end;
> +
>  	/* strip the nci control header */
>  	skb_pull(skb, NCI_CTRL_HDR_SIZE);
>