From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-il1-f199.google.com (mail-il1-f199.google.com [209.85.166.199]) (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 3C76D17276A for ; Fri, 5 Apr 2024 17:40:31 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.166.199 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1712338832; cv=none; b=CwTBQkj+mzlO9csM+BlxZHuAa6wVXunkzgYvA53FZkuQupDQsp1CqSpEMFn0Bc2c87Y84iNuCwbIBhmZO5rr4qVX2MIWNKYQgpltTVgil3ZvlN6b0EcwJCVR7gr4B5kJP5fz4Uess2Vkzupgij8Hcl1zDqd2qI5y8P9L9l/zEcI= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1712338832; c=relaxed/simple; bh=YSGCjNsngubo/Jl1dYAgPO8aCFH9ns4tj/o/yF+A/N4=; h=MIME-Version:Date:Message-ID:Subject:From:To:Content-Type; b=ZqzoLxHdHsxke3rbAsiy8IAdyBDBb9nrkF9alb/OX+eyCG0opQ5MAp9kYpSSrpkMNKS0pVPuWfkwF9gopumtWPvSKTFbPRv5mUWl4uGoggF7junceiklMByg0fVqab2IDLuFyF4H6tDnPWengiV7f1qDE7xJhnfAbIpug+sYgZg= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=fail (p=none dis=none) header.from=syzkaller.appspotmail.com; spf=pass smtp.mailfrom=M3KW2WVRGUFZ5GODRSRYTGD7.apphosting.bounces.google.com; arc=none smtp.client-ip=209.85.166.199 Authentication-Results: smtp.subspace.kernel.org; dmarc=fail (p=none dis=none) header.from=syzkaller.appspotmail.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=M3KW2WVRGUFZ5GODRSRYTGD7.apphosting.bounces.google.com Received: by mail-il1-f199.google.com with SMTP id e9e14a558f8ab-36a0a33c1bbso12750815ab.2 for ; Fri, 05 Apr 2024 10:40:30 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1712338830; x=1712943630; h=to:from:subject:message-id:date:mime-version:x-gm-message-state :from:to:cc:subject:date:message-id:reply-to; bh=ah/hZ2yJ0TwcfFp3XWyXAJ/KFmBkEoLcHbO6pknimo8=; b=S7rjfKC49ly0bXdQlSWnLiRBENUxFBmiux9OPbSRZ/CMHn+qKNRHaivPlMVthuM4jX mnhP5Sg5tkBLs71DFhYXmLbIIcazFvTCWyF97GTPEo9CystAIBnF44B0ZB2FE+GVyXZm gNZwwxDAS3BZBeSWfCzNmjG9qqh295lgRwVyTnYt+2fuuUFsQe19ARRI0XmE0ZJaucNL TQMDvwEmZiBy9XZaVe0XEMVbOks3xZW7IFoWLHMKevHmtCqU467aX4ZS7mvCiavSYj1e Gp+7tMmAjgeo6u+e+DcjQfJ5Ny89XfjkWM9KuKYp8kuXLa2d/bH2deffhwJXdWhRukqj fodg== X-Forwarded-Encrypted: i=1; AJvYcCUXt04cBpIxutSK71vOoccKsQK3i0VRm2Jc8LhPTbeKo8qZs9/Sj9gImBsP6j13W4z9QsW8cRBDpnSTY3mvz1cLo5dcPzgz2l19l2Wqp+SF X-Gm-Message-State: AOJu0YwPfuSrtB89qi4UKxp8DfttoGfZMxCcUS9JVz/cSMSNzAtHvDnZ suGSMXidw9WfyFLcWtT8IkElaOAgmRycU99cRY8Tz0wxAHArgugZROeZ+KPVxYf7XYDPkOXKhdG wWuLSYeIVo/XR75whGEk2mE+i47S3blBAV4VHimxKbuJJuOg80bHcx2g= X-Google-Smtp-Source: AGHT+IEa8ErI5FgU8ll+UtLrtt9fRtswGqcbjZC30844W8V4aUKoP5b0lwmlVyIv3bBsaEffu2BV5Iwtgb/xfl7/x8BopX03/sjL Precedence: bulk X-Mailing-List: linux-hardening@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Received: by 2002:a05:6e02:156f:b0:369:ac5f:9a10 with SMTP id k15-20020a056e02156f00b00369ac5f9a10mr142998ilu.1.1712338830394; Fri, 05 Apr 2024 10:40:30 -0700 (PDT) Date: Fri, 05 Apr 2024 10:40:30 -0700 X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <000000000000b8974d06155cf3a2@google.com> Subject: [syzbot] [mm?] [hardening?] BUG: bad usercopy in do_handle_open From: syzbot To: akpm@linux-foundation.org, gustavoars@kernel.org, keescook@chromium.org, linux-hardening@vger.kernel.org, linux-kernel@vger.kernel.org, linux-mm@kvack.org, syzkaller-bugs@googlegroups.com Content-Type: text/plain; charset="UTF-8" Hello, syzbot found the following issue on: HEAD commit: c0b832517f62 Add linux-next specific files for 20240402 git tree: linux-next console+strace: https://syzkaller.appspot.com/x/log.txt?x=13a5c3b1180000 kernel config: https://syzkaller.appspot.com/x/.config?x=afcaf46d374cec8c dashboard link: https://syzkaller.appspot.com/bug?extid=4372e026c95b0e36d0ee compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 syz repro: https://syzkaller.appspot.com/x/repro.syz?x=16ed9d29180000 C reproducer: https://syzkaller.appspot.com/x/repro.c?x=161ab3c6180000 Downloadable assets: disk image: https://storage.googleapis.com/syzbot-assets/0d36ec76edc7/disk-c0b83251.raw.xz vmlinux: https://storage.googleapis.com/syzbot-assets/6f9bb4e37dd0/vmlinux-c0b83251.xz kernel image: https://storage.googleapis.com/syzbot-assets/2349287b14b7/bzImage-c0b83251.xz IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+4372e026c95b0e36d0ee@syzkaller.appspotmail.com usercopy: Kernel memory overwrite attempt detected to SLUB object 'kmalloc-16' (offset 8, size 9)! ------------[ cut here ]------------ kernel BUG at mm/usercopy.c:102! Oops: invalid opcode: 0000 [#1] PREEMPT SMP KASAN PTI CPU: 1 PID: 5081 Comm: syz-executor249 Not tainted 6.9.0-rc2-next-20240402-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/27/2024 RIP: 0010:usercopy_abort+0x84/0x90 mm/usercopy.c:102 Code: 49 89 ce 48 c7 c3 e0 27 d8 8b 48 0f 44 de 48 c7 c7 80 26 d8 8b 4c 89 de 48 89 c1 41 52 41 56 53 e8 b1 6f 75 09 48 83 c4 18 90 <0f> 0b 66 2e 0f 1f 84 00 00 00 00 00 90 90 90 90 90 90 90 90 90 90 RSP: 0018:ffffc90003dbfd78 EFLAGS: 00010286 RAX: 0000000000000062 RBX: ffffffff8bd827e0 RCX: 2b2ecef8eabe4800 RDX: 0000000000000000 RSI: 0000000080000000 RDI: 0000000000000000 RBP: 0000000000000008 R08: ffffffff81760b9c R09: 1ffff920007b7f4c R10: dffffc0000000000 R11: fffff520007b7f4d R12: ffffea00008fe840 R13: 0000000000000009 R14: 0000000000000008 R15: 0000000000000009 FS: 000055556aa78380(0000) GS:ffff8880b9500000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000020000040 CR3: 0000000076e74000 CR4: 00000000003506f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: __check_heap_object+0xb1/0x100 mm/slub.c:5461 check_heap_object mm/usercopy.c:196 [inline] __check_object_size+0x1e3/0x900 mm/usercopy.c:251 check_object_size include/linux/thread_info.h:215 [inline] check_copy_size include/linux/thread_info.h:251 [inline] copy_from_user include/linux/uaccess.h:182 [inline] handle_to_path fs/fhandle.c:203 [inline] do_handle_open+0x1f6/0x660 fs/fhandle.c:226 do_syscall_64+0xfb/0x240 entry_SYSCALL_64_after_hwframe+0x72/0x7a RIP: 0033:0x7f27665352a9 Code: 48 83 c4 28 c3 e8 37 17 00 00 0f 1f 80 00 00 00 00 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 b8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007ffe7e4589d8 EFLAGS: 00000246 ORIG_RAX: 0000000000000130 RAX: ffffffffffffffda RBX: 00007ffe7e458bb8 RCX: 00007f27665352a9 RDX: 0000000000000000 RSI: 0000000020000040 RDI: 00000000ffffffff RBP: 00007f27665a8610 R08: 0000000000000000 R09: 0000000000000000 R10: 00000000ffffffff R11: 0000000000000246 R12: 0000000000000001 R13: 00007ffe7e458ba8 R14: 0000000000000001 R15: 0000000000000001 Modules linked in: ---[ end trace 0000000000000000 ]--- RIP: 0010:usercopy_abort+0x84/0x90 mm/usercopy.c:102 Code: 49 89 ce 48 c7 c3 e0 27 d8 8b 48 0f 44 de 48 c7 c7 80 26 d8 8b 4c 89 de 48 89 c1 41 52 41 56 53 e8 b1 6f 75 09 48 83 c4 18 90 <0f> 0b 66 2e 0f 1f 84 00 00 00 00 00 90 90 90 90 90 90 90 90 90 90 RSP: 0018:ffffc90003dbfd78 EFLAGS: 00010286 RAX: 0000000000000062 RBX: ffffffff8bd827e0 RCX: 2b2ecef8eabe4800 RDX: 0000000000000000 RSI: 0000000080000000 RDI: 0000000000000000 RBP: 0000000000000008 R08: ffffffff81760b9c R09: 1ffff920007b7f4c R10: dffffc0000000000 R11: fffff520007b7f4d R12: ffffea00008fe840 R13: 0000000000000009 R14: 0000000000000008 R15: 0000000000000009 FS: 000055556aa78380(0000) GS:ffff8880b9500000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000020000040 CR3: 0000000076e74000 CR4: 00000000003506f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 --- This report is generated by a bot. It may contain errors. See https://goo.gl/tpsmEJ for more information about syzbot. syzbot engineers can be reached at syzkaller@googlegroups.com. syzbot will keep track of this issue. See: https://goo.gl/tpsmEJ#status for how to communicate with syzbot. If the report is already addressed, let syzbot know by replying with: #syz fix: exact-commit-title If you want syzbot to run the reproducer, reply with: #syz test: git://repo/address.git branch-or-commit-hash If you attach or paste a git patch, syzbot will apply it before testing. If you want to overwrite report's subsystems, reply with: #syz set subsystems: new-subsystem (See the list of subsystem names on the web dashboard) If the report is a duplicate of another one, reply with: #syz dup: exact-subject-of-another-report If you want to undo deduplication, reply with: #syz undup