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Message-Id: <20231028144136.3462-1-bragathemanick0908@gmail.com> Date: Sat, 28 Oct 2023 20:11:36 +0530 From: Bragatheswaran Manickavel <bragathemanick0908@...il.com> To: davem@...emloft.net, edumazet@...gle.com, kuba@...nel.org, pabeni@...hat.com Cc: Bragatheswaran Manickavel <bragathemanick0908@...il.com>, dccp@...r.kernel.org, netdev@...r.kernel.org, linux-kernel@...r.kernel.org, syzbot+c71bc336c5061153b502@...kaller.appspotmail.com Subject: [PATCH net] dccp: check for ccid in ccid_hc_tx_send_packet ccid_hc_tx_send_packet might be called with a NULL ccid pointer leading to a NULL pointer dereference Below mentioned commit has similarly changes commit 276bdb82dedb ("dccp: check ccid before dereferencing") Reported-by: syzbot+c71bc336c5061153b502@...kaller.appspotmail.com Closes: https://syzkaller.appspot.com/bug?extid=c71bc336c5061153b502 Signed-off-by: Bragatheswaran Manickavel <bragathemanick0908@...il.com> --- net/dccp/ccid.h | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/net/dccp/ccid.h b/net/dccp/ccid.h index 105f3734dadb..1015dc2b9392 100644 --- a/net/dccp/ccid.h +++ b/net/dccp/ccid.h @@ -163,7 +163,7 @@ static inline int ccid_packet_dequeue_eval(const int return_code) static inline int ccid_hc_tx_send_packet(struct ccid *ccid, struct sock *sk, struct sk_buff *skb) { - if (ccid->ccid_ops->ccid_hc_tx_send_packet != NULL) + if (ccid != NULL && ccid->ccid_ops->ccid_hc_tx_send_packet != NULL) return ccid->ccid_ops->ccid_hc_tx_send_packet(sk, skb); return CCID_PACKET_SEND_AT_ONCE; } -- 2.34.1
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