From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-oo1-f80.google.com (mail-oo1-f80.google.com [209.85.161.80]) (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 F2C852AE77 for ; Wed, 4 Feb 2026 00:52:42 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.161.80 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1770166364; cv=none; b=RyWLi+Cuue7CxXJBYKr+xvyDAm1+mftfrMLEmyHRA7rKfm58JD6LTZLMB8OZSyuhGvYPXaaa/2fpbY2lcq6gnPoOLfoI5d7x5gIa658H1eN1Rv6iKF4Vrz+cgHGTLEU2mJlWimsiw+b48IW9LYxXi7lIN3/4ZwvlqFsXFW7LFQM= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1770166364; c=relaxed/simple; bh=mBG11paB0SpduwLeXCNERwXHJtCK7FCqAbSILRgwzgk=; h=MIME-Version:Date:Message-ID:Subject:From:To:Content-Type; b=JyE9GXowLHW9ZNl7vPskxVV1NOI34YD2olnuHq4IMVDvc0XjGGKwfMFq2J3j/AyQzQPvFMgJpOVSITqlSdTpVF2IAVp4Al3mkLmdID29OvIhRwBg/jjI4nm6Eq+iInmhmG4wv1jP1PP6oGcJcWxpUg0BFwmHJFbf6/7y5Wd3gT8= 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=209.85.161.80 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-oo1-f80.google.com with SMTP id 006d021491bc7-663005f0997so11381832eaf.0 for ; Tue, 03 Feb 2026 16:52:42 -0800 (PST) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1770166362; x=1770771162; h=to:from:subject:message-id:date:mime-version:x-gm-message-state :from:to:cc:subject:date:message-id:reply-to; bh=UAyljm+bx1mXbo5sDIthmt+TwGoTVIcjd3g0+pjNoxo=; b=PzQvuJYcNEcSvTNvm1dEjIFdu0m2SkyGMiKyM3RAjSco8bzUNhXTredoqfCxCm8jlm Nhz3VeI4lppoopqeZx/rMoJIoWchVg41moat/GR7ymOngw03ff75632pVOHxoijVqMzD dQJIDhvkLJJQJJUic5QUrK0r7tBUa0SY3R6/FjvEJbSaZuSPe0MNbaV4vlJMcwQRhM8o +hGqsm2YveyS8mZzAFZzJ0D7bXCdBdbS+e8EOQ30rLI3zExJinfOEUFXbn2Pkm2a8qGR a39X4w55u/eReNWHXjl+O+RM3ioIRbkTU5ZDFUig9qUWwmHsXzz8Zy9ap8L22Q6Amjfd h9gQ== X-Forwarded-Encrypted: i=1; AJvYcCXrOaiheAzAOxEkmqE2AHll4Es7/+aLnCbaGWERpyIhyMYjLF1O8Mx0gHBLvmIx05Qo7d0bnxrHj1SB6ME=@vger.kernel.org X-Gm-Message-State: AOJu0YyutrB4jHbPY6G1w3j4UltOY//49U7BWOKxSrOy3R9VEjDOjB1s OdNb1uSwX41S00pRsbLoPMOKYV6Z7m4rZKsgc9ip4yqCwrnDSML6vMTIuSdVX8vTlh0kojIf5OU cQwwh+cxXrWq5F8l874GR01psFgrc5n/Nd7aFJLsT8B4mJQO4bH6amqar92g= Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Received: by 2002:a05:6820:150b:b0:664:86ce:df3a with SMTP id 006d021491bc7-66a200bac0emr673347eaf.9.1770166361789; Tue, 03 Feb 2026 16:52:41 -0800 (PST) Date: Tue, 03 Feb 2026 16:52:41 -0800 X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <69829859.a00a0220.37c87e.0016.GAE@google.com> Subject: [syzbot] [ocfs2?] possible deadlock in ocfs2_simple_size_update From: syzbot To: jlbec@evilplan.org, joseph.qi@linux.alibaba.com, linux-kernel@vger.kernel.org, mark@fasheh.com, ocfs2-devel@lists.linux.dev, syzkaller-bugs@googlegroups.com Content-Type: text/plain; charset="UTF-8" Hello, syzbot found the following issue on: HEAD commit: 193579fe0138 Add linux-next specific files for 20260202 git tree: linux-next console output: https://syzkaller.appspot.com/x/log.txt?x=150d5252580000 kernel config: https://syzkaller.appspot.com/x/.config?x=9cdc86e72cf2268b dashboard link: https://syzkaller.appspot.com/bug?extid=26712dd1e036494d98de compiler: Debian clang version 21.1.8 (++20251221033036+2078da43e25a-1~exp1~20251221153213.50), Debian LLD 21.1.8 syz repro: https://syzkaller.appspot.com/x/repro.syz?x=10b3625a580000 C reproducer: https://syzkaller.appspot.com/x/repro.c?x=10d5cf2a580000 Downloadable assets: disk image: https://storage.googleapis.com/syzbot-assets/796c5916cada/disk-193579fe.raw.xz vmlinux: https://storage.googleapis.com/syzbot-assets/fd0dbd8c1346/vmlinux-193579fe.xz kernel image: https://storage.googleapis.com/syzbot-assets/bcec7f593a21/bzImage-193579fe.xz mounted in repro: https://storage.googleapis.com/syzbot-assets/35ef7015f796/mount_0.gz fsck result: OK (log: https://syzkaller.appspot.com/x/fsck.log?x=1337fbfa580000) IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+26712dd1e036494d98de@syzkaller.appspotmail.com (syz.0.17,5979,0):ocfs2_block_check_validate:402 ERROR: CRC32 failed: stored: 0xbec99099, computed 0x3881d996. Applying ECC. ocfs2: Mounting device (7,0) on (node local, slot 0) with ordered data mode. (syz.0.17,5979,0):ocfs2_block_check_validate:402 ERROR: CRC32 failed: stored: 0x93f628a2, computed 0x2aee8be5. Applying ECC. (syz.0.17,5979,1):ocfs2_block_check_validate:402 ERROR: CRC32 failed: stored: 0x98842a5e, computed 0xe74db1cd. Applying ECC. (syz.0.17,5979,1):ocfs2_block_check_validate:402 ERROR: CRC32 failed: stored: 0x1cec3d0f, computed 0xd2ffbdfe. Applying ECC. ====================================================== WARNING: possible circular locking dependency detected syzkaller #0 Not tainted ------------------------------------------------------ syz.0.17/5979 is trying to acquire lock: ffff888033b66610 (sb_internal#2){.+.+}-{0:0}, at: ocfs2_simple_size_update+0xd6/0x4a0 fs/ocfs2/file.c:322 but task is already holding lock: ffff88805e61cda0 (&ocfs2_quota_ip_alloc_sem_key){++++}-{4:4}, at: ocfs2_create_local_dquot+0x1a5/0x1af0 fs/ocfs2/quota_local.c:1227 which lock already depends on the new lock. the existing dependency chain (in reverse order) is: -> #3 (&ocfs2_quota_ip_alloc_sem_key){++++}-{4:4}: down_write+0x96/0x200 kernel/locking/rwsem.c:1590 ocfs2_lock_global_qf+0x201/0x290 fs/ocfs2/quota_global.c:314 ocfs2_acquire_dquot+0x3fa/0xb30 fs/ocfs2/quota_global.c:850 dqget+0x7b1/0xf10 fs/quota/dquot.c:980 __dquot_initialize+0x3ba/0xd30 fs/quota/dquot.c:1508 ocfs2_get_init_inode+0x147/0x1c0 fs/ocfs2/namei.c:206 ocfs2_mknod+0xa67/0x2290 fs/ocfs2/namei.c:314 ocfs2_create+0x195/0x490 fs/ocfs2/namei.c:677 lookup_open fs/namei.c:4483 [inline] open_last_lookups fs/namei.c:4583 [inline] path_openat+0x1395/0x3860 fs/namei.c:4827 do_file_open+0x23e/0x4a0 fs/namei.c:4859 do_sys_openat2+0x113/0x200 fs/open.c:1366 do_sys_open fs/open.c:1372 [inline] __do_sys_creat fs/open.c:1450 [inline] __se_sys_creat fs/open.c:1444 [inline] __x64_sys_creat+0x8f/0xc0 fs/open.c:1444 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0x14d/0xf80 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f -> #2 (&ocfs2_sysfile_lock_key[USER_QUOTA_SYSTEM_INODE]){+.+.}-{4:4}: down_write+0x96/0x200 kernel/locking/rwsem.c:1590 inode_lock include/linux/fs.h:1028 [inline] ocfs2_lock_global_qf+0x1da/0x290 fs/ocfs2/quota_global.c:313 ocfs2_acquire_dquot+0x3fa/0xb30 fs/ocfs2/quota_global.c:850 dqget+0x7b1/0xf10 fs/quota/dquot.c:980 __dquot_initialize+0x3ba/0xd30 fs/quota/dquot.c:1508 ocfs2_get_init_inode+0x147/0x1c0 fs/ocfs2/namei.c:206 ocfs2_mknod+0xa67/0x2290 fs/ocfs2/namei.c:314 ocfs2_create+0x195/0x490 fs/ocfs2/namei.c:677 lookup_open fs/namei.c:4483 [inline] open_last_lookups fs/namei.c:4583 [inline] path_openat+0x1395/0x3860 fs/namei.c:4827 do_file_open+0x23e/0x4a0 fs/namei.c:4859 do_sys_openat2+0x113/0x200 fs/open.c:1366 do_sys_open fs/open.c:1372 [inline] __do_sys_creat fs/open.c:1450 [inline] __se_sys_creat fs/open.c:1444 [inline] __x64_sys_creat+0x8f/0xc0 fs/open.c:1444 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0x14d/0xf80 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f -> #1 (&journal->j_trans_barrier){.+.+}-{4:4}: down_read+0x47/0x2e0 kernel/locking/rwsem.c:1537 ocfs2_start_trans+0x3ab/0x700 fs/ocfs2/journal.c:372 ocfs2_modify_bh+0xe3/0x4d0 fs/ocfs2/quota_local.c:101 ocfs2_local_read_info+0x1454/0x1810 fs/ocfs2/quota_local.c:767 dquot_load_quota_sb+0x791/0xbd0 fs/quota/dquot.c:2462 dquot_load_quota_inode+0x2e1/0x5d0 fs/quota/dquot.c:2499 ocfs2_enable_quotas+0x1c8/0x4a0 fs/ocfs2/super.c:930 ocfs2_fill_super+0x5305/0x6900 fs/ocfs2/super.c:1140 get_tree_bdev_flags+0x431/0x4f0 fs/super.c:1694 vfs_get_tree+0x92/0x2a0 fs/super.c:1754 fc_mount fs/namespace.c:1193 [inline] do_new_mount_fc fs/namespace.c:3760 [inline] do_new_mount+0x341/0xd30 fs/namespace.c:3836 do_mount fs/namespace.c:4159 [inline] __do_sys_mount fs/namespace.c:4348 [inline] __se_sys_mount+0x31d/0x420 fs/namespace.c:4325 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0x14d/0xf80 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f -> #0 (sb_internal#2){.+.+}-{0:0}: check_prev_add kernel/locking/lockdep.c:3165 [inline] check_prevs_add kernel/locking/lockdep.c:3284 [inline] validate_chain kernel/locking/lockdep.c:3908 [inline] __lock_acquire+0x15a5/0x2cf0 kernel/locking/lockdep.c:5237 lock_acquire+0xf0/0x2e0 kernel/locking/lockdep.c:5868 percpu_down_read_internal include/linux/percpu-rwsem.h:53 [inline] percpu_down_read_freezable include/linux/percpu-rwsem.h:83 [inline] __sb_start_write include/linux/fs/super.h:19 [inline] sb_start_intwrite include/linux/fs/super.h:177 [inline] ocfs2_start_trans+0x2ac/0x700 fs/ocfs2/journal.c:370 ocfs2_simple_size_update+0xd6/0x4a0 fs/ocfs2/file.c:322 ocfs2_extend_local_quota_file fs/ocfs2/quota_local.c:1126 [inline] ocfs2_create_local_dquot+0x70d/0x1af0 fs/ocfs2/quota_local.c:1230 ocfs2_acquire_dquot+0x6d7/0xb30 fs/ocfs2/quota_global.c:888 dqget+0x7b1/0xf10 fs/quota/dquot.c:980 __dquot_initialize+0x3ba/0xd30 fs/quota/dquot.c:1508 ocfs2_get_init_inode+0x147/0x1c0 fs/ocfs2/namei.c:206 ocfs2_mknod+0xa67/0x2290 fs/ocfs2/namei.c:314 ocfs2_create+0x195/0x490 fs/ocfs2/namei.c:677 lookup_open fs/namei.c:4483 [inline] open_last_lookups fs/namei.c:4583 [inline] path_openat+0x1395/0x3860 fs/namei.c:4827 do_file_open+0x23e/0x4a0 fs/namei.c:4859 do_sys_openat2+0x113/0x200 fs/open.c:1366 do_sys_open fs/open.c:1372 [inline] __do_sys_creat fs/open.c:1450 [inline] __se_sys_creat fs/open.c:1444 [inline] __x64_sys_creat+0x8f/0xc0 fs/open.c:1444 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0x14d/0xf80 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f other info that might help us debug this: Chain exists of: sb_internal#2 --> &ocfs2_sysfile_lock_key[USER_QUOTA_SYSTEM_INODE] --> &ocfs2_quota_ip_alloc_sem_key Possible unsafe locking scenario: CPU0 CPU1 ---- ---- lock(&ocfs2_quota_ip_alloc_sem_key); lock(&ocfs2_sysfile_lock_key[USER_QUOTA_SYSTEM_INODE]); lock(&ocfs2_quota_ip_alloc_sem_key); rlock(sb_internal#2); *** DEADLOCK *** 5 locks held by syz.0.17/5979: #0: ffff888033b66420 (sb_writers#12){.+.+}-{0:0}, at: mnt_want_write+0x41/0x90 fs/namespace.c:493 #1: ffff88805e613480 (&type->i_mutex_dir_key#8){+.+.}-{4:4}, at: inode_lock include/linux/fs.h:1028 [inline] #1: ffff88805e613480 (&type->i_mutex_dir_key#8){+.+.}-{4:4}, at: open_last_lookups fs/namei.c:4580 [inline] #1: ffff88805e613480 (&type->i_mutex_dir_key#8){+.+.}-{4:4}, at: path_openat+0xb4c/0x3860 fs/namei.c:4827 #2: ffff88805e609800 (&ocfs2_sysfile_lock_key[INODE_ALLOC_SYSTEM_INODE]){+.+.}-{4:4}, at: inode_lock include/linux/fs.h:1028 [inline] #2: ffff88805e609800 (&ocfs2_sysfile_lock_key[INODE_ALLOC_SYSTEM_INODE]){+.+.}-{4:4}, at: ocfs2_reserve_suballoc_bits+0x16a/0x4940 fs/ocfs2/suballoc.c:857 #3: ffff88805e44b6a8 (&dquot->dq_lock){+.+.}-{4:4}, at: ocfs2_acquire_dquot+0x271/0xb30 fs/ocfs2/quota_global.c:823 #4: ffff88805e61cda0 (&ocfs2_quota_ip_alloc_sem_key){++++}-{4:4}, at: ocfs2_create_local_dquot+0x1a5/0x1af0 fs/ocfs2/quota_local.c:1227 stack backtrace: CPU: 0 UID: 0 PID: 5979 Comm: syz.0.17 Not tainted syzkaller #0 PREEMPT(full) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/24/2026 Call Trace: dump_stack_lvl+0xe8/0x150 lib/dump_stack.c:120 print_circular_bug+0x2e1/0x300 kernel/locking/lockdep.c:2043 check_noncircular+0x12e/0x150 kernel/locking/lockdep.c:2175 check_prev_add kernel/locking/lockdep.c:3165 [inline] check_prevs_add kernel/locking/lockdep.c:3284 [inline] validate_chain kernel/locking/lockdep.c:3908 [inline] __lock_acquire+0x15a5/0x2cf0 kernel/locking/lockdep.c:5237 lock_acquire+0xf0/0x2e0 kernel/locking/lockdep.c:5868 percpu_down_read_internal include/linux/percpu-rwsem.h:53 [inline] percpu_down_read_freezable include/linux/percpu-rwsem.h:83 [inline] __sb_start_write include/linux/fs/super.h:19 [inline] sb_start_intwrite include/linux/fs/super.h:177 [inline] ocfs2_start_trans+0x2ac/0x700 fs/ocfs2/journal.c:370 ocfs2_simple_size_update+0xd6/0x4a0 fs/ocfs2/file.c:322 ocfs2_extend_local_quota_file fs/ocfs2/quota_local.c:1126 [inline] ocfs2_create_local_dquot+0x70d/0x1af0 fs/ocfs2/quota_local.c:1230 ocfs2_acquire_dquot+0x6d7/0xb30 fs/ocfs2/quota_global.c:888 dqget+0x7b1/0xf10 fs/quota/dquot.c:980 __dquot_initialize+0x3ba/0xd30 fs/quota/dquot.c:1508 ocfs2_get_init_inode+0x147/0x1c0 fs/ocfs2/namei.c:206 ocfs2_mknod+0xa67/0x2290 fs/ocfs2/namei.c:314 ocfs2_create+0x195/0x490 fs/ocfs2/namei.c:677 lookup_open fs/namei.c:4483 [inline] open_last_lookups fs/namei.c:4583 [inline] path_openat+0x1395/0x3860 fs/namei.c:4827 do_file_open+0x23e/0x4a0 fs/namei.c:4859 do_sys_openat2+0x113/0x200 fs/open.c:1366 do_sys_open fs/open.c:1372 [inline] __do_sys_creat fs/open.c:1450 [inline] __se_sys_creat fs/open.c:1444 [inline] __x64_sys_creat+0x8f/0xc0 fs/open.c:1444 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0x14d/0xf80 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f179d59aeb9 Code: ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 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 e8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007fff2b7c4428 EFLAGS: 00000246 ORIG_RAX: 0000000000000055 RAX: ffffffffffffffda RBX: 00007f179d815fa0 RCX: 00007f179d59aeb9 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 00002000000002c0 RBP: 00007f179d608c1f R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007f179d815fac R14: 00007f179d815fa0 R15: 00007f179d815fa0 (syz.0.17,5979,0):ocfs2_block_check_validate:402 ERROR: CRC32 failed: stored: 0x2c7b5077, computed 0x4d558a87. Applying ECC. (syz.0.17,5979,0):ocfs2_block_check_validate:416 ERROR: Fixed CRC32 failed: stored: 0x2c7b5077, computed 0x5d2751af (syz.0.17,5979,0):ocfs2_read_quota_phys_block:160 ERROR: status = -5 (syz.0.17,5979,0):ocfs2_quota_read:201 ERROR: status = -5 Quota error (device loop0): find_tree_dqentry: Can't read quota tree block 5 Quota error (device loop0): qtree_read_dquot: Can't read quota structure for id 0 (syz.0.17,5979,1):ocfs2_acquire_dquot:895 ERROR: status = -5 (syz.0.17,5979,1):ocfs2_mknod:318 ERROR: status = -5 (syz.0.17,5979,1):ocfs2_mknod:506 ERROR: status = -5 (syz.0.17,5979,1):ocfs2_create:679 ERROR: status = -5 --- 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