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b=D/ufva2JAUKGc0lpOVmFwsias7wuknIu9RHdICnGKeKbuperR9aQo2Yy/2gQ+UXf9 X35Iq/BrW2QgSQMgzraH3trk5JECCkyOLYm7M1gTegdIK+a5rohk5bmCA6QhHkZurO A01HgZmM2LzuCk/V1zYkEkg1u3/5IgXRQnR0TnTs= Received: from pek-lxu-l1.wrs.com ([111.198.228.153]) by newxmesmtplogicsvrsza10-0.qq.com (NewEsmtp) with SMTP id 7AE114C6; Fri, 05 Apr 2024 17:30:46 +0800 X-QQ-mid: xmsmtpt1712309446td1n5rfli Message-ID: X-QQ-XMAILINFO: NvH2zBBgt3uT6SfvEicVD2L0azpIUZsry5UZlZ/RieIYOCWufmbvfBoj3qo0pF R4JEHDx4TohK6Rn1CFs+i8hWfV6gY7azQT+PTT/HJ56WKvfbYJpeWwNFEqMNflL2Aa2TQ4DjMUA5 k8fjry3WBHuVo6FPenVaXnidy7g/Q1mGl0KSHJjE6GQC61A2hQZMsQbAvpT1I+GdCDHD/FCXWQRe Ha4uAiP3OAPGEwNM9P9fiHhb8KPh+PHBB8cAYLw655RG3Y7xdjhs7eihaGv3GH7DdLRvx+WZhqMY m4yOpxLTkjjlGXjrYqh/oDzNTu4tLlQMkY3tJtPqgqw13OAH6w9k4QZVPM/FRGASnWdxLDrPHmSM tgZbmWhtS6aP/je+0va+8YGhQ61HYMmLtzZj8vSAJdF7LlCnb3xkaVQasdR99r29Irs3HI4mGENL SZPH8y1nU0Fm06sl2R3hZdDpCgV+daV8vAm8j7i7c9IySTwxGVnkwwe2/DccVQwU1e+HCL+kqn9I jsPP/65jg66uIIK+WahvVjEC6kZN0NyeXQHoSZgj7j8/IrpudUyPgTsEEz8SNBKTnf53zaA0OO3E znBtsB0kgTb8S/M8jBt28IvgPVYmmY3eh4Kc99/WopFkNVMjAc9hyGEj9p2Sd+DNNBlHaKsNsU8k 9e6uDWSiDXf5AywiIuDGSt4+bwcZ+zmzf2J6Mt7aK8SkxHqqcgyFsK3r/LXfEzFs07R5HMgJcVwx yc/ZoBkEHNBC2FoF6H/R7vy9+XZtnbiAKxRlMoLnFRKc4XE1AX2v1Qew6Mz0V6iAvXM0fC+sEZeH cMvcO86zcMv8RgEeLrWBhIoK7dRuoNOVfr6NmdUQbNDAN6TvHee/gqV7zTnBYMqZ3r66UlYcfaB6 rVq2mB2paHOSBAAp1FJejkWagbD4dzz5++n0ukykcll9PXbtNY4IPsb/JPp2ke5Zd3ZYpSVe7cht qOVvsniFn8QO7SdIK8eA== X-QQ-XMRINFO: NyFYKkN4Ny6FSmKK/uo/jdU= From: Edward Adam Davis To: syzbot+d4ecae01a53fd9b42e7d@syzkaller.appspotmail.com Cc: linux-kernel@vger.kernel.org, syzkaller-bugs@googlegroups.com Subject: Re: [syzbot] [bluetooth?] KASAN: slab-out-of-bounds Read in rfcomm_sock_setsockopt Date: Fri, 5 Apr 2024 17:30:46 +0800 X-OQ-MSGID: <20240405093045.520623-2-eadavis@qq.com> X-Mailer: git-send-email 2.43.0 In-Reply-To: <000000000000b9b20e061553f06e@google.com> References: <000000000000b9b20e061553f06e@google.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit please test oob in rfcomm_sock_setsockopt #syz test https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git fe46a7dd189e diff --git a/net/bluetooth/rfcomm/sock.c b/net/bluetooth/rfcomm/sock.c index b54e8a530f55..42c55c756b51 100644 --- a/net/bluetooth/rfcomm/sock.c +++ b/net/bluetooth/rfcomm/sock.c @@ -629,7 +629,7 @@ static int rfcomm_sock_setsockopt_old(struct socket *sock, int optname, switch (optname) { case RFCOMM_LM: - if (copy_from_sockptr(&opt, optval, sizeof(u32))) { + if (copy_from_sockptr(&opt, optval, min_t(int, sizeof(u32), optlen))) { err = -EFAULT; break; }