From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-il1-f206.google.com (mail-il1-f206.google.com [209.85.166.206]) (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 D17581373 for ; Mon, 29 Sep 2025 11:19:34 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.166.206 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1759144776; cv=none; b=WvLQzbmivI3YxE2wnNV6j2364vDUyDHo/D2Tx0nJ/DEPJowNz3kbba7mRR91mQmePv8zEERe2tXZM2ARaNE8T2QVfwXlLTCLujY7JelMZu+f1FLDgP8hpe6YWtK1R4Y8CPR9rPrvlMKkwATjxWcXu/loXVSIj+gRkBYsEzxKfbA= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1759144776; c=relaxed/simple; bh=qsC8nmTNDWgfrSJczB2vM+JxEg6Io3xeF78OMelW4vE=; h=MIME-Version:Date:Message-ID:Subject:From:To:Content-Type; b=WaMKUGOLScHK7IwmgpQtaKi3969dclR8SIcEpiyNx/EQZz38zvGe9mG+c4p54xUMCiiA2bbBxxm26oiQ7iWmPU18mT1ZTZLK6+PIzbCLIKCxF2hk5KF3rPzTgtF+AI8Cx6+esUB8TqeZgK3cHbP92Gi4bdhaYM3knRVKvDzM84Q= 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=209.85.166.206 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-f206.google.com with SMTP id e9e14a558f8ab-42486b1d287so124094775ab.0 for ; Mon, 29 Sep 2025 04:19:34 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1759144774; x=1759749574; h=to:from:subject:message-id:date:mime-version:x-gm-message-state :from:to:cc:subject:date:message-id:reply-to; bh=08hGSZlHtga8CIS0a/iAlGFEPP1F0snL36igz9koUJw=; b=UoJEcxgPXQKivumhoglHTbBV7Hoobn8sQ4fdobzO/OYt+QTGgebBnm7MHjINIeuVXk caVYb3CYAtIK4pl//uzmyxhqt9RtuFEbxN9v00761M2UHuD9eT6tD3fzwab07lO9ZdJo JnBeZjhZwJiQ3ElF0a5gB9mcAS6PnEXAzqI9UL7QEEUcwiDaaFe4mRDhOw2oNeCPnZLy hQ5eObLl6aYrUen6iBeO5OfDIiNGNovluglrYAtNVbhYWSf68AAT6LP0Z+dhT3HXzEvC zwp8r9OUmuBw8EKILlir3CIfdClnvRlfLUCnSUkQSRdUAgYLqXNcK88ZBTml41uIp7Ll b0qw== X-Forwarded-Encrypted: i=1; AJvYcCVZ4RxOdMIdS8DoKC7pKYJVTXBtQvvnK7uggWqoq4yqTXQTZwkdh6nn2uPTUiQpi8OT2G0BCDq4/qSUJ6Q=@vger.kernel.org X-Gm-Message-State: AOJu0YxAK8EU9kLxbGBhcr3vvF/yJaNNrbj34Nm6Nt4smRdjpOncsShv kNbeWlwfuDVpKhQY/UigpWbco6HH5U7kmkx2w2sEGRV4nCrURprhzQjwvl+WgZTn/6YA8QSkEm8 g5Kz+DTHrP0xGDOBZRdtAV7i2mn29yrh9B35I2lNLHGUBhC6Feagizbv3Ukc= X-Google-Smtp-Source: AGHT+IHRTPuY7t1PvT96TXZpWYYUVd6O0WSzFdMb58XBM4n5LsHfW+1jd3nfEcaaxzeSSdIfSqKL5qhBY2NUx6QpyAarZHplYD0g Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Received: by 2002:a05:6e02:2184:b0:427:638b:f7b3 with SMTP id e9e14a558f8ab-42c735c6263mr18402065ab.22.1759144773950; Mon, 29 Sep 2025 04:19:33 -0700 (PDT) Date: Mon, 29 Sep 2025 04:19:33 -0700 X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <68da6b45.050a0220.1696c6.0015.GAE@google.com> Subject: [syzbot] [ext4?] WARNING in ext4_xattr_inode_dec_ref_all From: syzbot To: adilger.kernel@dilger.ca, linux-ext4@vger.kernel.org, linux-kernel@vger.kernel.org, syzkaller-bugs@googlegroups.com, tytso@mit.edu Content-Type: text/plain; charset="UTF-8" Hello, syzbot found the following issue on: HEAD commit: b5a4da2c459f Add linux-next specific files for 20250924 git tree: linux-next console output: https://syzkaller.appspot.com/x/log.txt?x=12abed34580000 kernel config: https://syzkaller.appspot.com/x/.config?x=fc64d939cce41d2 dashboard link: https://syzkaller.appspot.com/bug?extid=55cb5d2db550fbc52264 compiler: Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8 Unfortunately, I don't have any reproducer for this issue yet. Downloadable assets: disk image: https://storage.googleapis.com/syzbot-assets/127c931e6696/disk-b5a4da2c.raw.xz vmlinux: https://storage.googleapis.com/syzbot-assets/cf4957abd39e/vmlinux-b5a4da2c.xz kernel image: https://storage.googleapis.com/syzbot-assets/860d3ac61bac/bzImage-b5a4da2c.xz IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+55cb5d2db550fbc52264@syzkaller.appspotmail.com loop7: detected capacity change from 0 to 512 EXT4-fs warning (device loop7): ext4_xattr_inode_get:542: inode #11: comm syz.7.2381: ea_inode file size=0 entry size=6 ------------[ cut here ]------------ EA inode 11 i_nlink=2 WARNING: fs/ext4/xattr.c:1053 at ext4_xattr_inode_update_ref+0x534/0x5d0 fs/ext4/xattr.c:1051, CPU#0: syz.7.2381/16796 Modules linked in: CPU: 0 UID: 0 PID: 16796 Comm: syz.7.2381 Not tainted syzkaller #0 PREEMPT(full) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/18/2025 RAX: 13d1ab016548b300 RBX: dffffc0000000000 RCX: 0000000000080000 RDX: ffffc9000cc0d000 RSI: 0000000000008560 RDI: 0000000000008561 RBP: ffffc9000ba57390 R08: 0000000000000003 R09: 0000000000000004 R10: dffffc0000000000 R11: fffffbfff1c3a65c R12: ffff8880546a1f90 R13: 1ffff1100a8d43f2 R14: 00000000ffffffff R15: 000000000000000b FS: 00007f560bbf66c0(0000) GS:ffff888125a03000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fab211156c0 CR3: 000000005ffc2000 CR4: 00000000003526f0 DR0: 0000000000000008 DR1: 0000000000000002 DR2: 0000000000000081 DR3: ffffffffefffff14 DR6: 00000000ffff0ff0 DR7: 0000000000000400 Call Trace: ext4_xattr_inode_dec_ref fs/ext4/xattr.c:1076 [inline] ext4_xattr_inode_dec_ref_all+0x867/0xda0 fs/ext4/xattr.c:1218 ext4_xattr_delete_inode+0xa4c/0xc10 fs/ext4/xattr.c:2942 ext4_evict_inode+0xac9/0xee0 fs/ext4/inode.c:271 evict+0x504/0x9c0 fs/inode.c:810 ext4_orphan_cleanup+0xc20/0x1460 fs/ext4/orphan.c:474 __ext4_fill_super fs/ext4/super.c:5615 [inline] ext4_fill_super+0x57df/0x6090 fs/ext4/super.c:5734 get_tree_bdev_flags+0x40e/0x4d0 fs/super.c:1691 vfs_get_tree+0x92/0x2b0 fs/super.c:1751 fc_mount fs/namespace.c:1208 [inline] do_new_mount_fc fs/namespace.c:3651 [inline] do_new_mount+0x302/0x9e0 fs/namespace.c:3725 do_mount fs/namespace.c:4048 [inline] __do_sys_mount fs/namespace.c:4236 [inline] __se_sys_mount+0x313/0x410 fs/namespace.c:4213 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xfa/0xfa0 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f560d99066a Code: d8 64 89 02 48 c7 c0 ff ff ff ff eb a6 e8 de 1a 00 00 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 49 89 ca b8 a5 00 00 00 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:00007f560bbf5e68 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5 RAX: ffffffffffffffda RBX: 00007f560bbf5ef0 RCX: 00007f560d99066a RDX: 0000200000000180 RSI: 00002000000001c0 RDI: 00007f560bbf5eb0 RBP: 0000200000000180 R08: 00007f560bbf5ef0 R09: 0000000000800700 R10: 0000000000800700 R11: 0000000000000246 R12: 00002000000001c0 R13: 00007f560bbf5eb0 R14: 0000000000000473 R15: 0000200000000680 --- 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