From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp-bc0f.mail.infomaniak.ch (smtp-bc0f.mail.infomaniak.ch [45.157.188.15]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 9324E77F32 for ; Mon, 29 Apr 2024 14:46:23 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=45.157.188.15 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1714401988; cv=none; b=lpvdb9kEBWXoAP0Vc17WCkd2p3g6usXBg2F3L7t8OLIvv86TzJb/R5S+lvDO1FPzzMhlqrjQD/Bx2kecLkJE5llipaW9xFLzOif0Ff0cfyXqxojqwnchfF8pqiKyvg5k+bIhe/G9n8sFJ/DLgiVxfN8DtSW3U8fYOOKyOCOQWjM= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1714401988; c=relaxed/simple; bh=ZPYXNWtZgVhgJXwEodlMEK1xGAdzBeNDB4Dn1jTvHBQ=; h=Date:From:To:Cc:Subject:Message-ID:References:MIME-Version: Content-Type:Content-Disposition:In-Reply-To; b=Zs/jf91GyYoQdv38tgsbv0Q7nzJpCAN477M7MoHhpZ485zlKhHNrcMM85jmce/NcsafqtstDYhnkz8GsAtkX2WU18TwZJTVHoL7IZGNKDoLxWgDStTIdZVbPNuzPwGODrC94U5peZrW+VtaVfDpAlprx0VFKDpE4fZZCjvf9d9I= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=digikod.net; spf=pass smtp.mailfrom=digikod.net; dkim=pass (1024-bit key) header.d=digikod.net header.i=@digikod.net header.b=1vmX3/lo; arc=none smtp.client-ip=45.157.188.15 Authentication-Results: smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=digikod.net Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=digikod.net Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=digikod.net header.i=@digikod.net header.b="1vmX3/lo" Received: from smtp-3-0000.mail.infomaniak.ch (smtp-3-0000.mail.infomaniak.ch [10.4.36.107]) by smtp-4-3000.mail.infomaniak.ch (Postfix) with ESMTPS id 4VSmNs2sPczCVc; Mon, 29 Apr 2024 16:46:21 +0200 (CEST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=digikod.net; s=20191114; t=1714401981; bh=ZPYXNWtZgVhgJXwEodlMEK1xGAdzBeNDB4Dn1jTvHBQ=; h=Date:From:To:Cc:Subject:References:In-Reply-To:From; b=1vmX3/lolLE2GryXLD5Hs8sDa+5RkY9f+2t2tMX3X8Sj73JCWdcxofA58YW4Ca/x/ G5gOzMcK9hwKO/RRz0XkLpWUG23sL0s4+Uto2tnBN5meKCF/5xBuQP/nelUmAC0726 TRgZvxv62ryr6+PsJDP9ESy1la6P8WDOtIptXfK0= Received: from unknown by smtp-3-0000.mail.infomaniak.ch (Postfix) with ESMTPA id 4VSmNr6DWfzFnV; Mon, 29 Apr 2024 16:46:20 +0200 (CEST) Date: Mon, 29 Apr 2024 16:46:19 +0200 From: =?utf-8?Q?Micka=C3=ABl_Sala=C3=BCn?= To: Ubisectech Sirius Cc: linux-trace-kernel , linux-kernel , linux-security-module , =?utf-8?Q?G=C3=BCnther?= Noack Subject: Re: =?utf-8?B?5Zue5aSN77yaV0FSTklO?= =?utf-8?Q?G?= in current_check_refer_path Message-ID: <20240429.ieR4Ajeitee5@digikod.net> References: <20240429.Iyohkaimiep1@digikod.net> Precedence: bulk X-Mailing-List: linux-trace-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Disposition: inline Content-Transfer-Encoding: 8bit In-Reply-To: X-Infomaniak-Routing: alpha On Mon, Apr 29, 2024 at 05:16:57PM +0800, Ubisectech Sirius wrote: > > Hello, > > > Thanks for the report. Could you please provide a reproducer? > > > Regards, > > Mickaël > > Hi. > The Poc file has seed to you as attachment. Indeed, but could you please trim down the file. There are 650 lines, most of them are irrelevant. > > > On Sun, Apr 28, 2024 at 10:47:02AM +0800, Ubisectech Sirius wrote: > >> Hello. > >> We are Ubisectech Sirius Team, the vulnerability lab of China ValiantSec. Recently, our team has discovered a issue in Linux kernel 6.7. Attached to the email were a PoC file of the issue. > >> > >> Stack dump: > >> > > > loop3: detected capacity change from 0 to 1024 > > > ------------[ cut here ]------------ > > > WARNING: CPU: 0 PID: 30368 at security/landlock/fs.c:598 get_mode_access security/landlock/fs.c:598 [inline] > > > WARNING: CPU: 0 PID: 30368 at security/landlock/fs.c:598 get_mode_access security/landlock/fs.c:578 [inline] > > > WARNING: CPU: 0 PID: 30368 at security/landlock/fs.c:598 current_check_refer_path+0x955/0xa60 security/landlock/fs.c:758 > > > Modules linked in: > > > CPU: 0 PID: 30368 Comm: syz-executor.3 Not tainted 6.7.0 #2 > > > Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.15.0-1 04/01/2014 > > > RIP: 0010:get_mode_access security/landlock/fs.c:598 [inline] > > > RIP: 0010:get_mode_access security/landlock/fs.c:578 [inline] > > > RIP: 0010:current_check_refer_path+0x955/0xa60 security/landlock/fs.c:758 > > > Code: e9 76 fb ff ff 41 bc fe ff ff ff e9 6b fb ff ff e8 00 99 77 fd 90 0f 0b 90 41 bc f3 ff ff ff e9 57 fb ff ff e8 ec 98 77 fd 90 <0f> 0b 90 31 db e9 86 f9 ff ff bb 00 08 00 00 e9 7c f9 ff ff 41 ba > > > RSP: 0018:ffffc90001fb7ba0 EFLAGS: 00010212 > > > RAX: 0000000000000bc5 RBX: ffff88805feeb7b0 RCX: ffffc90006e15000 > > > RDX: 0000000000040000 RSI: ffffffff84125d64 RDI: 0000000000000003 > > > RBP: ffff8880123c5608 R08: 0000000000000003 R09: 000000000000c000 > > > R10: 000000000000f000 R11: 0000000000000000 R12: ffff88805d32fc00 > > > R13: ffff8880123c5608 R14: 0000000000000000 R15: 0000000000000001 > > > FS: 00007fd70c4d8640(0000) GS:ffff88802c600000(0000) knlGS:0000000000000000 > > > CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 > > > CR2: 0000001b2c136000 CR3: 000000005b2a0000 CR4: 0000000000750ef0 > > > DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 > > > DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 > > > PKRU: 55555554 > > > Call Trace: > > > > > > security_path_rename+0x124/0x230 security/security.c:1828 > > > do_renameat2+0x9f6/0xd30 fs/namei.c:4983 > > > __do_sys_rename fs/namei.c:5042 [inline] > > > __se_sys_rename fs/namei.c:5040 [inline] > > > __x64_sys_rename+0x81/0xa0 fs/namei.c:5040 > > > do_syscall_x64 arch/x86/entry/common.c:52 [inline] > > > do_syscall_64+0x43/0x120 arch/x86/entry/common.c:83 > > > entry_SYSCALL_64_after_hwframe+0x6f/0x77 > > > RIP: 0033:0x7fd70b6900ed > > > Code: c3 e8 97 2b 00 00 0f 1f 80 00 00 00 00 f3 0f 1e fa 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 b0 ff ff ff f7 d8 64 89 01 48 > > > RSP: 002b:00007fd70c4d8028 EFLAGS: 00000246 ORIG_RAX: 0000000000000052 > > > RAX: ffffffffffffffda RBX: 00007fd70b7cbf80 RCX: 00007fd70b6900ed > >> RDX: 0000000000000000 RSI: 0000000020000140 RDI: 0000000020000100 > > > RBP: 00007fd70b6f14a6 R08: 0000000000000000 R09: 0000000000000000 > > > R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 > > > R13: 000000000000000b R14: 00007fd70b7cbf80 R15: 00007fd70c4b8000 > > > > > > > > > Thank you for taking the time to read this email and we look forward to working with you further. > > > > > > > > > > > > > > > > > > > > > > > > > >