(syz.3.71,6955,0):ocfs2_block_check_validate:402 ERROR: CRC32 failed: stored: 0x98842a5e, computed 0xe74db1cd. Applying ECC. ====================================================== WARNING: possible circular locking dependency detected syzkaller #0 Not tainted ------------------------------------------------------ syz.3.71/6955 is trying to acquire lock: ffff88802e0fa618 (sb_internal#2){.+.+}-{0:0}, at: ocfs2_extend_allocation+0x6cf/0x1780 fs/ocfs2/file.c:597 but task is already holding lock: ffff888053275100 (&ocfs2_sysfile_lock_key[GLOBAL_BITMAP_SYSTEM_INODE]){+.+.}-{4:4}, at: inode_lock include/linux/fs.h:870 [inline] ffff888053275100 (&ocfs2_sysfile_lock_key[GLOBAL_BITMAP_SYSTEM_INODE]){+.+.}-{4:4}, at: ocfs2_reserve_suballoc_bits+0x15a/0x4620 fs/ocfs2/suballoc.c:788 which lock already depends on the new lock. the existing dependency chain (in reverse order) is: -> #7 (&ocfs2_sysfile_lock_key[GLOBAL_BITMAP_SYSTEM_INODE]){+.+.}-{4:4}: down_write+0x92/0x1f0 kernel/locking/rwsem.c:1590 inode_lock include/linux/fs.h:870 [inline] ocfs2_reserve_suballoc_bits+0x15a/0x4620 fs/ocfs2/suballoc.c:788 ocfs2_reserve_cluster_bitmap_bits fs/ocfs2/suballoc.c:1134 [inline] ocfs2_reserve_clusters_with_limit+0x2f7/0xba0 fs/ocfs2/suballoc.c:1179 ocfs2_reserve_clusters fs/ocfs2/suballoc.c:1229 [inline] ocfs2_lock_allocators+0x2f6/0x5b0 fs/ocfs2/suballoc.c:2772 ocfs2_extend_allocation+0x396/0x1780 fs/ocfs2/file.c:589 ocfs2_extend_no_holes+0x20a/0x490 fs/ocfs2/file.c:1027 ocfs2_acquire_dquot+0x6c2/0xb20 fs/ocfs2/quota_global.c:853 dqget+0x7ad/0xf00 fs/quota/dquot.c:977 ocfs2_setattr+0xd6e/0x1b30 fs/ocfs2/file.c:1233 notify_change+0xb32/0xe40 fs/attr.c:552 chown_common+0x408/0x5b0 fs/open.c:791 vfs_fchown fs/open.c:859 [inline] ksys_fchown+0xe6/0x160 fs/open.c:871 __do_sys_fchown fs/open.c:876 [inline] __se_sys_fchown fs/open.c:874 [inline] __x64_sys_fchown+0x76/0x90 fs/open.c:874 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0x86/0x2e0 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x76/0x7e -> #6 (&ocfs2_quota_ip_alloc_sem_key){++++}-{4:4}: down_write+0x92/0x1f0 kernel/locking/rwsem.c:1590 ocfs2_lock_global_qf+0x1e4/0x270 fs/ocfs2/quota_global.c:314 ocfs2_acquire_dquot+0x2ac/0xb20 fs/ocfs2/quota_global.c:828 dqget+0x7ad/0xf00 fs/quota/dquot.c:977 ocfs2_setattr+0xd6e/0x1b30 fs/ocfs2/file.c:1233 notify_change+0xb32/0xe40 fs/attr.c:552 chown_common+0x408/0x5b0 fs/open.c:791 vfs_fchown fs/open.c:859 [inline] ksys_fchown+0xe6/0x160 fs/open.c:871 __do_sys_fchown fs/open.c:876 [inline] __se_sys_fchown fs/open.c:874 [inline] __x64_sys_fchown+0x76/0x90 fs/open.c:874 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0x86/0x2e0 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x76/0x7e -> #5 (&ocfs2_sysfile_lock_key[USER_QUOTA_SYSTEM_INODE]){+.+.}-{4:4}: down_write+0x92/0x1f0 kernel/locking/rwsem.c:1590 inode_lock include/linux/fs.h:870 [inline] ocfs2_lock_global_qf+0x1c6/0x270 fs/ocfs2/quota_global.c:313 ocfs2_acquire_dquot+0x2ac/0xb20 fs/ocfs2/quota_global.c:828 dqget+0x7ad/0xf00 fs/quota/dquot.c:977 ocfs2_setattr+0xd6e/0x1b30 fs/ocfs2/file.c:1233 notify_change+0xb32/0xe40 fs/attr.c:552 chown_common+0x408/0x5b0 fs/open.c:791 vfs_fchown fs/open.c:859 [inline] ksys_fchown+0xe6/0x160 fs/open.c:871 __do_sys_fchown fs/open.c:876 [inline] __se_sys_fchown fs/open.c:874 [inline] __x64_sys_fchown+0x76/0x90 fs/open.c:874 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0x86/0x2e0 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x76/0x7e -> #4 (&dquot->dq_lock){+.+.}-{4:4}: __mutex_lock_common kernel/locking/mutex.c:598 [inline] __mutex_lock+0x189/0x14b0 kernel/locking/mutex.c:760 wait_on_dquot fs/quota/dquot.c:354 [inline] dqget+0x726/0xf00 fs/quota/dquot.c:972 dquot_transfer+0x2f4/0x6c0 fs/quota/dquot.c:2140 ext4_setattr+0x861/0x1bc0 fs/ext4/inode.c:5902 notify_change+0xb32/0xe40 fs/attr.c:552 chown_common+0x408/0x5b0 fs/open.c:791 vfs_fchown fs/open.c:859 [inline] ksys_fchown+0xe6/0x160 fs/open.c:871 __do_sys_fchown fs/open.c:876 [inline] __se_sys_fchown fs/open.c:874 [inline] __x64_sys_fchown+0x76/0x90 fs/open.c:874 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0x86/0x2e0 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x76/0x7e -> #3 (&ei->xattr_sem){.+.+}-{4:4}: down_read+0x42/0x2e0 kernel/locking/rwsem.c:1537 ext4_setattr+0x851/0x1bc0 fs/ext4/inode.c:5901 notify_change+0xb32/0xe40 fs/attr.c:552 chown_common+0x408/0x5b0 fs/open.c:791 do_fchownat+0x15d/0x270 fs/open.c:822 __do_sys_chown fs/open.c:842 [inline] __se_sys_chown fs/open.c:840 [inline] __x64_sys_chown+0x7e/0x90 fs/open.c:840 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0x86/0x2e0 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x76/0x7e -> #2 (jbd2_handle){++++}-{0:0}: start_this_handle+0x1f9d/0x21b0 fs/jbd2/transaction.c:444 jbd2__journal_start+0x2bd/0x5b0 fs/jbd2/transaction.c:501 jbd2_journal_start+0x26/0x40 fs/jbd2/transaction.c:540 ocfs2_start_trans+0x372/0x6c0 fs/ocfs2/journal.c:374 ocfs2_modify_bh+0xe4/0x470 fs/ocfs2/quota_local.c:101 ocfs2_local_read_info+0x1461/0x17e0 fs/ocfs2/quota_local.c:767 dquot_load_quota_sb+0x78a/0xbc0 fs/quota/dquot.c:2459 dquot_load_quota_inode+0x2dd/0x5d0 fs/quota/dquot.c:2496 ocfs2_enable_quotas+0x1c2/0x440 fs/ocfs2/super.c:930 ocfs2_fill_super+0x50f4/0x63b0 fs/ocfs2/super.c:1140 get_tree_bdev_flags+0x40a/0x4d0 fs/super.c:1692 vfs_get_tree+0x8e/0x280 fs/super.c:1815 do_new_mount+0x29e/0x9e0 fs/namespace.c:3808 do_mount fs/namespace.c:4136 [inline] __do_sys_mount fs/namespace.c:4347 [inline] __se_sys_mount+0x313/0x410 fs/namespace.c:4324 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0x86/0x2e0 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x76/0x7e -> #1 (&journal->j_trans_barrier){.+.+}-{4:4}: down_read+0x42/0x2e0 kernel/locking/rwsem.c:1537 ocfs2_start_trans+0x366/0x6c0 fs/ocfs2/journal.c:372 ocfs2_modify_bh+0xe4/0x470 fs/ocfs2/quota_local.c:101 ocfs2_local_read_info+0x1461/0x17e0 fs/ocfs2/quota_local.c:767 dquot_load_quota_sb+0x78a/0xbc0 fs/quota/dquot.c:2459 dquot_load_quota_inode+0x2dd/0x5d0 fs/quota/dquot.c:2496 ocfs2_enable_quotas+0x1c2/0x440 fs/ocfs2/super.c:930 ocfs2_fill_super+0x50f4/0x63b0 fs/ocfs2/super.c:1140 get_tree_bdev_flags+0x40a/0x4d0 fs/super.c:1692 vfs_get_tree+0x8e/0x280 fs/super.c:1815 do_new_mount+0x29e/0x9e0 fs/namespace.c:3808 do_mount fs/namespace.c:4136 [inline] __do_sys_mount fs/namespace.c:4347 [inline] __se_sys_mount+0x313/0x410 fs/namespace.c:4324 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0x86/0x2e0 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x76/0x7e -> #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+0x15bc/0x2df0 kernel/locking/lockdep.c:5237 lock_acquire+0x11c/0x350 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.h:1799 [inline] sb_start_intwrite include/linux/fs.h:1982 [inline] ocfs2_start_trans+0x267/0x6c0 fs/ocfs2/journal.c:370 ocfs2_extend_allocation+0x6cf/0x1780 fs/ocfs2/file.c:597 ocfs2_extend_no_holes+0x20a/0x490 fs/ocfs2/file.c:1027 ocfs2_acquire_dquot+0x6c2/0xb20 fs/ocfs2/quota_global.c:853 dqget+0x7ad/0xf00 fs/quota/dquot.c:977 ocfs2_setattr+0xd6e/0x1b30 fs/ocfs2/file.c:1233 notify_change+0xb32/0xe40 fs/attr.c:552 chown_common+0x408/0x5b0 fs/open.c:791 vfs_fchown fs/open.c:859 [inline] ksys_fchown+0xe6/0x160 fs/open.c:871 __do_sys_fchown fs/open.c:876 [inline] __se_sys_fchown fs/open.c:874 [inline] __x64_sys_fchown+0x76/0x90 fs/open.c:874 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0x86/0x2e0 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x76/0x7e other info that might help us debug this: Chain exists of: sb_internal#2 --> &ocfs2_quota_ip_alloc_sem_key --> &ocfs2_sysfile_lock_key[GLOBAL_BITMAP_SYSTEM_INODE] Possible unsafe locking scenario: CPU0 CPU1 ---- ---- lock(&ocfs2_sysfile_lock_key[GLOBAL_BITMAP_SYSTEM_INODE]); lock(&ocfs2_quota_ip_alloc_sem_key); lock(&ocfs2_sysfile_lock_key[GLOBAL_BITMAP_SYSTEM_INODE]); rlock(sb_internal#2); *** DEADLOCK *** 6 locks held by syz.3.71/6955: #0: ffff88802e0fa428 (sb_writers#12){.+.+}-{0:0}, at: mnt_want_write_file+0x5c/0x200 fs/namespace.c:601 #1: ffff8880532709c0 (&type->i_mutex_dir_key#8){+.+.}-{4:4}, at: inode_lock_killable include/linux/fs.h:875 [inline] #1: ffff8880532709c0 (&type->i_mutex_dir_key#8){+.+.}-{4:4}, at: chown_common+0x30f/0x5b0 fs/open.c:779 #2: ffff88805316a0a8 (&dquot->dq_lock){+.+.}-{4:4}, at: ocfs2_acquire_dquot+0x29f/0xb20 fs/ocfs2/quota_global.c:823 #3: ffff888053275f40 (&ocfs2_sysfile_lock_key[USER_QUOTA_SYSTEM_INODE]){+.+.}-{4:4}, at: inode_lock include/linux/fs.h:870 [inline] #3: ffff888053275f40 (&ocfs2_sysfile_lock_key[USER_QUOTA_SYSTEM_INODE]){+.+.}-{4:4}, at: ocfs2_lock_global_qf+0x1c6/0x270 fs/ocfs2/quota_global.c:313 #4: ffff888053275be0 (&ocfs2_quota_ip_alloc_sem_key){++++}-{4:4}, at: ocfs2_lock_global_qf+0x1e4/0x270 fs/ocfs2/quota_global.c:314 #5: ffff888053275100 (&ocfs2_sysfile_lock_key[GLOBAL_BITMAP_SYSTEM_INODE]){+.+.}-{4:4}, at: inode_lock include/linux/fs.h:870 [inline] #5: ffff888053275100 (&ocfs2_sysfile_lock_key[GLOBAL_BITMAP_SYSTEM_INODE]){+.+.}-{4:4}, at: ocfs2_reserve_suballoc_bits+0x15a/0x4620 fs/ocfs2/suballoc.c:788 stack backtrace: CPU: 0 UID: 0 PID: 6955 Comm: syz.3.71 Not tainted syzkaller #0 PREEMPT(full) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/18/2025 Call Trace: dump_stack_lvl+0x185/0x250 lib/dump_stack.c:120 print_circular_bug+0x2ed/0x300 kernel/locking/lockdep.c:2043 check_noncircular+0x130/0x150 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+0x15bc/0x2df0 kernel/locking/lockdep.c:5237 lock_acquire+0x11c/0x350 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.h:1799 [inline] sb_start_intwrite include/linux/fs.h:1982 [inline] ocfs2_start_trans+0x267/0x6c0 fs/ocfs2/journal.c:370 ocfs2_extend_allocation+0x6cf/0x1780 fs/ocfs2/file.c:597 ocfs2_extend_no_holes+0x20a/0x490 fs/ocfs2/file.c:1027 ocfs2_acquire_dquot+0x6c2/0xb20 fs/ocfs2/quota_global.c:853 dqget+0x7ad/0xf00 fs/quota/dquot.c:977 ocfs2_setattr+0xd6e/0x1b30 fs/ocfs2/file.c:1233 notify_change+0xb32/0xe40 fs/attr.c:552 chown_common+0x408/0x5b0 fs/open.c:791 vfs_fchown fs/open.c:859 [inline] ksys_fchown+0xe6/0x160 fs/open.c:871 __do_sys_fchown fs/open.c:876 [inline] __se_sys_fchown fs/open.c:874 [inline] __x64_sys_fchown+0x76/0x90 fs/open.c:874 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0x86/0x2e0 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x76/0x7e RIP: 0033:0x7f3b6218ebe9 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:00007f3b62fad038 EFLAGS: 00000246 ORIG_RAX: 000000000000005d RAX: ffffffffffffffda RBX: 00007f3b623b5fa0 RCX: 00007f3b6218ebe9 RDX: 000000000000000a RSI: 000000003a736e6f RDI: 0000000000000005 RBP: 00007f3b62211e19 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007f3b623b6038 R14: 00007f3b623b5fa0 R15: 00007ffe506c6888 (syz.3.71,6955,1):ocfs2_block_check_validate:402 ERROR: CRC32 failed: stored: 0xdf8356d3, computed 0xb8c23ae4. Applying ECC. (syz.3.71,6955,0):ocfs2_block_check_validate:416 ERROR: Fixed CRC32 failed: stored: 0xdf8356d3, computed 0x2acb7e3c (syz.3.71,6955,0):ocfs2_read_quota_phys_block:160 ERROR: status = -5 (syz.3.71,6955,0):ocfs2_quota_read:201 ERROR: status = -5 Quota error (device loop3): qtree_write_dquot: Error -5 occurred while creating quota (syz.3.71,6955,0):ocfs2_acquire_dquot:890 ERROR: status = -5