From nobody Fri Dec 19 17:19:52 2025 Received: from mail-pl1-f196.google.com (mail-pl1-f196.google.com [209.85.214.196]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id BF5C12E0B47 for ; Thu, 6 Nov 2025 13:58:09 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.214.196 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1762437491; cv=none; b=QLP2Fq/B/Js5+w7okWcvz5AyPYkXMGh5/YxiyjkKDshTPHR1oNYLC6wlJ2MSvs/nsjzmpJoshpcAw2ORL78qCje2iYjFtOxLn7qVOzmTFCG9X+gAaBZ4iNNW/qth7hFwgCSQEKdBfIPOd/gEfBVeIBeex9F+xzPVmddrCsQPoRI= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1762437491; c=relaxed/simple; bh=xm32/PUt7XgP0AJBnuwZMLyFiMHFhdYO5mBVoIGW22o=; h=From:To:Cc:Subject:Date:Message-Id:In-Reply-To:References: MIME-Version; b=iMnH9mcUy2VO/tPih+YCEGbK4T+iZC/+A7y925nMCWWyGrqrImCqlmuWjtO1cbMDYIueqCOw8qSAuI4XyWIPdoffqjwOfmSPxYBKcjY0O2dScW6HZdH5A00rHLfpzIB2D7dW9PISRWsc/TGtUxMAmEyOs9t9DAbz75xgHcorNJs= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=gmail.com; spf=pass smtp.mailfrom=gmail.com; dkim=pass (2048-bit key) header.d=gmail.com header.i=@gmail.com header.b=EzRc3ES1; arc=none smtp.client-ip=209.85.214.196 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=gmail.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=gmail.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=gmail.com header.i=@gmail.com header.b="EzRc3ES1" Received: by mail-pl1-f196.google.com with SMTP id d9443c01a7336-2951e58fa43so1071045ad.1 for ; Thu, 06 Nov 2025 05:58:09 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20230601; t=1762437489; x=1763042289; darn=vger.kernel.org; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:from:to:cc:subject:date :message-id:reply-to; bh=CJ2p4fKScptUntxDD4RknqhZ7LLlOjfrAorczf3l+6o=; b=EzRc3ES19SnWtvBn3KY8R6QK9rMxorvrsGWx/ZYYk5jdN2p37orAm1nMdf3gpYuRNC Tu+1/6lj73UwjxXTvCS8XdJULyde/XJPn72v9WlteOgnxzc6ZKziasd9mqFZp0edQQTv WHCnGrYNQZFGfcRwiDMgzSy1pXDlRDQArE6QSeHy40t7tdxZ/6RdZ4THQBWGCbvVy1Al itr88cNCncPgrtBnz4QTPmescf8DnpIulKvUgzuDU6WwsfnZ2MTy3dKRFInr1wAXn4gj CW+R+8XpBPzvVEEXuQl1TVgh/ognw0HKPlIMa0srefcQNcktzXNmMDZuJhlVxTAzOWpm Sfig== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1762437489; x=1763042289; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:x-gm-message-state:from:to:cc :subject:date:message-id:reply-to; bh=CJ2p4fKScptUntxDD4RknqhZ7LLlOjfrAorczf3l+6o=; b=Rdtn2pkThhKSqLeXsd3hifqsElID+jwdN0baDOzpim6HHa3MFRLehTC7X6yKQacZfP 8132gC6bpstDEGi5OeytjuPsq9We6QNIkoui2MZ68FUvFTJtFtPbQd0A6FNJ4+pPh1hX XuCaH0j35dTZcQP7Hkhg9B9tagiynWfTUH4GCvsBTA6zUp7dIBblnhFUUulcKWuArFmz XNBk7hAUaY2G5XO6VKBnuSpbDx2a+wHHo55pk14VV2WEPfwXs+J6v/eAaPcdSI5YHvhA vOWu82p4+3eAG6erLIlGORt6LUy0Bg5Bisnu55MvNC23RBsoaDzEUAmrEFWL3aSbhJ2w TG+g== X-Forwarded-Encrypted: i=1; AJvYcCXEm3ugkDkIGf/yPi901RR7z1ub2qjAYNQgD9Zv6i/QM/o7NniYagg84c5d4NY+6zFLv9Joqk910XIfkRU=@vger.kernel.org X-Gm-Message-State: AOJu0YzcVonGyR9HvZpgaFHka7a2zAwAVcSgpDBLiedRhLxbVC6PmOPv tOTsq3m/x4WKpefuPQl0DH4ynF5JOh10QT8KcSvm7AoQk+J4AbpQ3dGB X-Gm-Gg: ASbGnctrEwmm03y80gudFmqlO6dKssU0h6njCzYmW05eDX6/L96RgMMa8YhS1XU1t2K QHao1K71TGpfg810mFY+aMRKpnIc/qE6r3/qLik/GgCAjU/9MTRwPixXE+HsiL0kCcgn1c54Kzq 7s6ErhuaaXQ1n9r7DFwDVoGGPMuhMw/3hW6QQhNccg/45rIPzwWRHbGGPrKnoWBHj3kcKoAS7Un +Mh5oStO06zdKDAS032RE/FN5pWgmDdYUq2R4e1yBbrw24gNbCEmC0ijshxg0dylMQgRkUnQCzI ZRFnsdGT9CG1RKxaR+ZPWx5h/nfS8hA+5Hf4t+dLIsfoyheGs91Xw/xVwJykMapSpgFn0cWKRID l9SWoyVFJmpahRotDkw6LUmWQrUHBJNJa0KINso40vplNFe7RoZvfaeQxZkta6jeIZyIHM0EMBX w= X-Google-Smtp-Source: AGHT+IEqMgZ7opDOUpiaQ/1pkphHXH5yXYJ0l9b+0/N5P7cyoOtDV0gJB9a3rdSrbl3cPEiiU+wihw== X-Received: by 2002:a17:902:c402:b0:295:4d64:3c88 with SMTP id d9443c01a7336-2962ae532b4mr53521975ad.7.1762437488720; Thu, 06 Nov 2025 05:58:08 -0800 (PST) Received: from user.. ([58.206.232.74]) by smtp.gmail.com with ESMTPSA id 98e67ed59e1d1-341a68bf37bsm6439593a91.7.2025.11.06.05.58.05 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 06 Nov 2025 05:58:08 -0800 (PST) From: clingfei X-Google-Original-From: clingfei <1599101385@qq.com> To: horms@kernel.org Cc: davem@davemloft.net, edumazet@google.com, herbert@gondor.apana.org.au, kuba@kernel.org, linux-kernel@vger.kernel.org, netdev@vger.kernel.org, pabeni@redhat.com, steffen.klassert@secunet.com, eadavis@qq.com, ssrane_b23@ee.vjti.ac.in, syzbot+be97dd4da14ae88b6ba4@syzkaller.appspotmail.com, syzkaller-bugs@googlegroups.com, clf700383@gmail.com Subject: [PATCH 1/3] fix integer overflow in set_ipsecrequest Date: Thu, 6 Nov 2025 21:56:56 +0800 Message-Id: <20251106135658.866481-2-1599101385@qq.com> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20251106135658.866481-1-1599101385@qq.com> References: <20251106135658.866481-1-1599101385@qq.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" From: clingfei syzbot reported a kernel BUG in set_ipsecrequest() due to an skb_over_panic. The mp->new_family and mp->old_family is u16, while set_ipsecrequest receiv= es family as uint8_t, causing a integer overflow and the later size_req calcu= lation error, which exceeds the size used in alloc_skb, and ultimately triggered t= he kernel bug in skb_put. Reported-by: syzbot+be97dd4da14ae88b6ba4@syzkaller.appspotmail.com Closes: https://syzkaller.appspot.com/bug?extid=3Dbe97dd4da14ae88b6ba4 Signed-off-by: Cheng Lingfei --- net/key/af_key.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/net/key/af_key.c b/net/key/af_key.c index 2ebde0352245..aa4bd29f27ea 100644 --- a/net/key/af_key.c +++ b/net/key/af_key.c @@ -3518,7 +3518,7 @@ static int set_sadb_kmaddress(struct sk_buff *skb, co= nst struct xfrm_kmaddress * =20 static int set_ipsecrequest(struct sk_buff *skb, uint8_t proto, uint8_t mode, int level, - uint32_t reqid, uint8_t family, + u32 reqid, uint16_t family, const xfrm_address_t *src, const xfrm_address_t *dst) { struct sadb_x_ipsecrequest *rq; --=20 2.34.1