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 C900614D70B for ; Fri, 29 Nov 2024 06:42:29 +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=1732862551; cv=none; b=o4bZH94nJE6yqxdSbWdVhM1ItFyO1Bb+7OW22B7t8FDdwLzJnPU+ijOhngpkDJQsmsByfEX6syBLXePez+FfmdxasPV67uCX7dZkWWoPd8mYqf0ha76jDfJ2tjHIGYuzEE4S8jSJLxFI5A3bqWUuQflQEaBIx5Ka8AxvJN04S2o= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1732862551; c=relaxed/simple; bh=tWfUNdPe5dPJrlkPG7M/Vf1isjT6Xw1COFMQ++6ZhZA=; h=MIME-Version:Date:Message-ID:Subject:From:To:Content-Type; b=Lq+lMzgnvW5FO7b2aJ/1dPHXeq+Qb+lbufhuPrIAuK8itNhP8X16ElxPEUc/Ws458Imt9lgqoA66KMn5/ViSHUzp/+SJQHeTKTAbGRm88JoY4jJh29l3NJJBBTw5K1kMiV5+HGACpn0fTstLegV/VkLNsnM9uKvypsHWG6SJDuM= 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-3a7a1e95f19so14729645ab.1 for ; Thu, 28 Nov 2024 22:42:29 -0800 (PST) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1732862549; x=1733467349; h=to:from:subject:message-id:date:mime-version:x-gm-message-state :from:to:cc:subject:date:message-id:reply-to; bh=CD8x9KRAK1LCMpYyl25z1y0rxMD0DzxEj7pSOvbXZ4g=; b=EXvvd00H5jTly1KvDMKYGuRgIQXPinMHn4Elcirr5ONutRmqTYHeCL4p8g3WzNVX0w naJ6BVn925D7r15EtwK9wemvG9RLLbK+ivbkFqGpz6Ufs1gAzJDOHU/OGsLuUtUQ87rj NLQ0CVr7ixRCkO07DGbRFZZaJRRSK/MPfc982JlVIx5dpRGc0v2d4Z7Ba01kybJCZPbb jZzJrAivH29hO6X5uWZtu8fBmOI2/wK3GKynWxdYkZ9E5a6Bn/z5NyGHbeVrVwtimv62 CdSJHZk9bsMAXOdCYht17WTKGRFhq7a5IIctcQCCy8XfZhHmQ3REblayuDroFY5YjEAP Gi3g== X-Forwarded-Encrypted: i=1; AJvYcCVmQ93iKBt7UYy0Cs2/pE7du6gJ2mUyBmb3M0IfU2dIcxeVa1VYgE2nwyz+OeznsW1JJH17iX6pYPCXddq/@vger.kernel.org X-Gm-Message-State: AOJu0Yzrg8Hwia3nYsjR/PijKhGit+tNpyga5oojSjdlH3/VrG1URZL6 GA8bzCg/WojC5G9zbFwQ0hLWqUw5kwMExjIrm9fCuENs1GKGVcyQJBezC1rTxsfQuuuDXE82/lx PXscfNutKwi4NJhAuyZoVEWLxSJppiQtvxIFq/Ol2lMiI/uNmCwrGfw8= X-Google-Smtp-Source: AGHT+IG7fpQQp79dZOqBJMRjYItyfBBZddtwPIomhcAcPwVNtS2nnp0gh5eqa7p3DOuN0R+BVTpsxK7lgs1cNLCKthaWdGUouAxQ Precedence: bulk X-Mailing-List: linux-unionfs@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Received: by 2002:a05:6e02:1a03:b0:3a7:432d:912f with SMTP id e9e14a558f8ab-3a7c5525801mr90116455ab.1.1732862548950; Thu, 28 Nov 2024 22:42:28 -0800 (PST) Date: Thu, 28 Nov 2024 22:42:28 -0800 X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <67496254.050a0220.253251.00a3.GAE@google.com> Subject: [syzbot] [overlayfs?] WARNING in ovl_workdir_create (4) From: syzbot To: amir73il@gmail.com, linux-kernel@vger.kernel.org, linux-unionfs@vger.kernel.org, miklos@szeredi.hu, syzkaller-bugs@googlegroups.com Content-Type: text/plain; charset="UTF-8" Hello, syzbot found the following issue on: HEAD commit: 85a2dd7d7c81 Add linux-next specific files for 20241125 git tree: linux-next console output: https://syzkaller.appspot.com/x/log.txt?x=167f25c0580000 kernel config: https://syzkaller.appspot.com/x/.config?x=45719eec4c74e6ba dashboard link: https://syzkaller.appspot.com/bug?extid=fbcf713b26e03b637adb compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 Unfortunately, I don't have any reproducer for this issue yet. Downloadable assets: disk image: https://storage.googleapis.com/syzbot-assets/5422dd6ada68/disk-85a2dd7d.raw.xz vmlinux: https://storage.googleapis.com/syzbot-assets/3a382ed71d3a/vmlinux-85a2dd7d.xz kernel image: https://storage.googleapis.com/syzbot-assets/9b4d03eb0da3/bzImage-85a2dd7d.xz IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+fbcf713b26e03b637adb@syzkaller.appspotmail.com loop4: detected capacity change from 0 to 4096 ------------[ cut here ]------------ DEBUG_RWSEMS_WARN_ON((rwsem_owner(sem) != current) && !rwsem_test_oflags(sem, RWSEM_NONSPINNABLE)): count = 0x0, magic = 0xffff88804e04a088, owner = 0x0, curr 0xffff888034fa3c00, list empty WARNING: CPU: 1 PID: 12660 at kernel/locking/rwsem.c:1368 __up_write kernel/locking/rwsem.c:1367 [inline] WARNING: CPU: 1 PID: 12660 at kernel/locking/rwsem.c:1368 up_write+0x502/0x590 kernel/locking/rwsem.c:1630 Modules linked in: CPU: 1 UID: 0 PID: 12660 Comm: syz.4.2018 Not tainted 6.12.0-next-20241125-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024 RIP: 0010:__up_write kernel/locking/rwsem.c:1367 [inline] RIP: 0010:up_write+0x502/0x590 kernel/locking/rwsem.c:1630 Code: c7 c7 60 8a 0a 8c 48 c7 c6 80 8c 0a 8c 48 8b 54 24 28 48 8b 4c 24 18 4d 89 e0 4c 8b 4c 24 30 53 e8 b3 27 e6 ff 48 83 c4 08 90 <0f> 0b 90 90 e9 6a fd ff ff 48 c7 c1 c4 d8 18 90 80 e1 07 80 c1 03 RSP: 0018:ffffc9000fdb74e0 EFLAGS: 00010292 RAX: 1172aec84e22b600 RBX: ffffffff8c0a8b40 RCX: 0000000000080000 RDX: ffffc90004be1000 RSI: 000000000000848e RDI: 000000000000848f RBP: ffffc9000fdb75b0 R08: ffffffff81601b32 R09: fffffbfff1cfa218 R10: dffffc0000000000 R11: fffffbfff1cfa218 R12: 0000000000000000 R13: ffff88804e04a088 R14: 1ffff92001fb6ea4 R15: dffffc0000000000 FS: 00007f35e2a3a6c0(0000) GS:ffff8880b8700000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000000000000 CR3: 000000005cc32000 CR4: 00000000003526f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: inode_unlock include/linux/fs.h:823 [inline] ovl_workdir_create+0x8e1/0x980 fs/overlayfs/super.c:353 ovl_make_workdir fs/overlayfs/super.c:650 [inline] ovl_get_workdir+0x311/0x1920 fs/overlayfs/super.c:808 ovl_fill_super+0x12a8/0x3560 fs/overlayfs/super.c:1376 vfs_get_super fs/super.c:1280 [inline] get_tree_nodev+0xb7/0x140 fs/super.c:1299 vfs_get_tree+0x90/0x2b0 fs/super.c:1814 do_new_mount+0x2be/0xb40 fs/namespace.c:3507 do_mount fs/namespace.c:3847 [inline] __do_sys_mount fs/namespace.c:4057 [inline] __se_sys_mount+0x2d6/0x3c0 fs/namespace.c:4034 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f35e1b7e819 Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 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 a8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007f35e2a3a038 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5 RAX: ffffffffffffffda RBX: 00007f35e1d35fa0 RCX: 00007f35e1b7e819 RDX: 0000000020000000 RSI: 0000000020000040 RDI: 0000000000000000 RBP: 00007f35e1bf175e R08: 0000000020000100 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 0000000000000000 R14: 00007f35e1d35fa0 R15: 00007fffb14ff288 --- 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 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