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(mail-oa1-f78.google.com [209.85.160.78]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (2048 bits) server-digest SHA256) (No client certificate requested) by lists.ozlabs.org (Postfix) with ESMTPS id 4RDrFm2hRNz2yhN for ; Mon, 31 Jul 2023 17:58:02 +1000 (AEST) Received: by mail-oa1-f78.google.com with SMTP id 586e51a60fabf-1a663daf3a0so9703139fac.0 for ; Mon, 31 Jul 2023 00:58:02 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20221208; t=1690790278; x=1691395078; h=to:from:subject:message-id:date:mime-version:x-gm-message-state :from:to:cc:subject:date:message-id:reply-to; bh=iPXHzk/BZ/Q4PQzBz4wJPb3Eoe2+5Gm/gYE7LjWFAwQ=; b=MC8bcFWW0eSaLw7utw1rt4UIuz2n4z972b0+QH0CgBKE31QxvwGzBoy0XrDKikhA10 nmcSmKT/d+Jdo0PBHRtxtsVKvkLb4vJHBmtB4RxAntVJZzcZNKB7hWtQ51JDhlihwuUC EhG+UF07EgXcSK0V7skM7vsJeSPa5j7sdjpw+0T5Lz5e52R8HutyTl0BReDXo7wupc2l 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linux-fsdevel@vger.kernel.org, linux-kernel@vger.kernel.org, sj1557.seo@samsung.com, syzkaller-bugs@googlegroups.com, xiang@kernel.org Content-Type: text/plain; charset="UTF-8" X-BeenThere: linux-erofs@lists.ozlabs.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Development of Linux EROFS file system List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: linux-erofs-bounces+linux-erofs=archiver.kernel.org@lists.ozlabs.org Sender: "Linux-erofs" Hello, syzbot found the following issue on: HEAD commit: d7b3af5a77e8 Add linux-next specific files for 20230728 git tree: linux-next console+strace: https://syzkaller.appspot.com/x/log.txt?x=13018b26a80000 kernel config: https://syzkaller.appspot.com/x/.config?x=62dd327c382e3fe dashboard link: https://syzkaller.appspot.com/bug?extid=69c477e882e44ce41ad9 compiler: gcc (Debian 12.2.0-14) 12.2.0, GNU ld (GNU Binutils for Debian) 2.40 syz repro: https://syzkaller.appspot.com/x/repro.syz?x=17b490c5a80000 C reproducer: https://syzkaller.appspot.com/x/repro.c?x=139a9c7ea80000 Downloadable assets: disk image: https://storage.googleapis.com/syzbot-assets/5efa5e68267f/disk-d7b3af5a.raw.xz vmlinux: https://storage.googleapis.com/syzbot-assets/b1f5d3e10263/vmlinux-d7b3af5a.xz kernel image: https://storage.googleapis.com/syzbot-assets/57cab469d186/bzImage-d7b3af5a.xz mounted in repro: https://storage.googleapis.com/syzbot-assets/2cf2189f623b/mount_0.gz The issue was bisected to: commit 1dbd9ceb390c4c61d28cf2c9251dd2015946ce51 Author: Jan Kara Date: Mon Jul 24 17:51:45 2023 +0000 fs: open block device after superblock creation bisection log: https://syzkaller.appspot.com/x/bisect.txt?x=1613d586a80000 final oops: https://syzkaller.appspot.com/x/report.txt?x=1513d586a80000 console output: https://syzkaller.appspot.com/x/log.txt?x=1113d586a80000 IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+69c477e882e44ce41ad9@syzkaller.appspotmail.com Fixes: 1dbd9ceb390c ("fs: open block device after superblock creation") /dev/nullb0: Can't open blockdev ------------[ cut here ]------------ WARNING: CPU: 0 PID: 5047 at fs/erofs/super.c:862 erofs_kill_sb+0x206/0x260 fs/erofs/super.c:862 Modules linked in: CPU: 0 PID: 5047 Comm: syz-executor356 Not tainted 6.5.0-rc3-next-20230728-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/12/2023 RIP: 0010:erofs_kill_sb+0x206/0x260 fs/erofs/super.c:862 Code: 00 00 5b 5d 41 5c 41 5d e9 e7 27 b7 fd e8 e2 27 b7 fd 48 89 df e8 6a 81 1b fe 5b 5d 41 5c 41 5d e9 cf 27 b7 fd e8 ca 27 b7 fd <0f> 0b e9 41 fe ff ff e8 5e f6 0b fe e9 1a fe ff ff e8 54 f6 0b fe RSP: 0018:ffffc90003c2fca0 EFLAGS: 00010293 RAX: 0000000000000000 RBX: ffff888029aee000 RCX: 0000000000000000 RDX: ffff8880268e9dc0 RSI: ffffffff83cfdc26 RDI: 0000000000000007 RBP: 00000000e0f5e1e2 R08: 0000000000000007 R09: 00000000e0f5e1e2 R10: 0000000000000000 R11: 0000000000000001 R12: 0000000000000000 R13: 1ffff92000785fa0 R14: 00000000fffffff0 R15: ffff88807d747cf8 FS: 0000555556001380(0000) GS:ffff8880b9800000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000055aecc7b6468 CR3: 000000007b9d9000 CR4: 00000000003506f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: deactivate_locked_super+0x9a/0x170 fs/super.c:330 get_tree_bdev+0x4c7/0x6a0 fs/super.c:1347 vfs_get_tree+0x88/0x350 fs/super.c:1521 do_new_mount fs/namespace.c:3335 [inline] path_mount+0x1492/0x1ed0 fs/namespace.c:3662 do_mount fs/namespace.c:3675 [inline] __do_sys_mount fs/namespace.c:3884 [inline] __se_sys_mount fs/namespace.c:3861 [inline] __x64_sys_mount+0x293/0x310 fs/namespace.c:3861 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x38/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x63/0xcd RIP: 0033:0x7f7610a75f09 Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 f1 17 00 00 90 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:00007fffaf351d38 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5 RAX: ffffffffffffffda RBX: 6c756e2f7665642f RCX: 00007f7610a75f09 RDX: 0000000020000080 RSI: 0000000020000040 RDI: 0000000020000000 RBP: 00000000000f4240 R08: 0000000000000000 R09: 0000555556002378 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000001 R13: 00007fffaf351d70 R14: 00007fffaf351d5c R15: 00007f7610abf03b --- 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. For information about bisection process see: https://goo.gl/tpsmEJ#bisection If the bug is already fixed, 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 change bug's subsystems, reply with: #syz set subsystems: new-subsystem (See the list of subsystem names on the web dashboard) If the bug is a duplicate of another bug, reply with: #syz dup: exact-subject-of-another-report If you want to undo deduplication, reply with: #syz undup