ocfs2: Mounting device (7,2) on (node local, slot 0) with ordered data mode. ====================================================== WARNING: possible circular locking dependency detected 6.1.138-syzkaller #0 Not tainted ------------------------------------------------------ syz.2.3876/13098 is trying to acquire lock: ffff0000e22a3f60 (&ocfs2_quota_ip_alloc_sem_key){++++}-{3:3}, at: ocfs2_lock_global_qf+0x1a8/0x22c fs/ocfs2/quota_global.c:314 but task is already holding lock: ffff0000e22a42c8 (&ocfs2_sysfile_lock_key[args->fi_sysfile_type]#8){+.+.}-{3:3}, at: inode_lock include/linux/fs.h:758 [inline] ffff0000e22a42c8 (&ocfs2_sysfile_lock_key[args->fi_sysfile_type]#8){+.+.}-{3:3}, at: ocfs2_lock_global_qf+0x18c/0x22c fs/ocfs2/quota_global.c:313 which lock already depends on the new lock. the existing dependency chain (in reverse order) is: -> #6 (&ocfs2_sysfile_lock_key[args->fi_sysfile_type]#8){+.+.}-{3:3}: down_write+0x5c/0x88 kernel/locking/rwsem.c:1573 inode_lock include/linux/fs.h:758 [inline] ocfs2_lock_global_qf+0x18c/0x22c fs/ocfs2/quota_global.c:313 ocfs2_acquire_dquot+0x268/0xac4 fs/ocfs2/quota_global.c:816 dqget+0x654/0xccc fs/quota/dquot.c:988 dquot_set_dqblk+0x40/0xe50 fs/quota/dquot.c:2833 quota_setquota+0x400/0x490 fs/quota/quota.c:310 do_quotactl+0x65c/0x738 fs/quota/quota.c:802 __do_sys_quotactl fs/quota/quota.c:960 [inline] __se_sys_quotactl fs/quota/quota.c:916 [inline] __arm64_sys_quotactl+0x2ac/0x730 fs/quota/quota.c:916 __invoke_syscall arch/arm64/kernel/syscall.c:38 [inline] invoke_syscall+0x98/0x2bc arch/arm64/kernel/syscall.c:52 el0_svc_common+0x138/0x258 arch/arm64/kernel/syscall.c:140 do_el0_svc+0x58/0x13c arch/arm64/kernel/syscall.c:204 el0_svc+0x58/0x138 arch/arm64/kernel/entry-common.c:637 el0t_64_sync_handler+0x84/0xf0 arch/arm64/kernel/entry-common.c:655 el0t_64_sync+0x18c/0x190 arch/arm64/kernel/entry.S:585 -> #5 (&dquot->dq_lock){+.+.}-{3:3}: __mutex_lock_common+0x190/0x1f38 kernel/locking/mutex.c:603 __mutex_lock kernel/locking/mutex.c:747 [inline] mutex_lock_nested+0x38/0x44 kernel/locking/mutex.c:799 dquot_commit+0x50/0x1c4 fs/quota/dquot.c:507 ext4_write_dquot+0x1b4/0x31c fs/ext4/super.c:6778 ext4_mark_dquot_dirty+0xe8/0x140 fs/ext4/super.c:6855 mark_dquot_dirty fs/quota/dquot.c:372 [inline] mark_all_dquot_dirty+0x1f8/0x424 fs/quota/dquot.c:412 __dquot_free_space+0x744/0xa80 fs/quota/dquot.c:1942 dquot_free_space_nodirty include/linux/quotaops.h:379 [inline] dquot_free_space include/linux/quotaops.h:384 [inline] dquot_free_block include/linux/quotaops.h:395 [inline] ext4_mb_clear_bb fs/ext4/mballoc.c:6143 [inline] ext4_free_blocks+0x18c8/0x23cc fs/ext4/mballoc.c:6273 ext4_remove_blocks fs/ext4/extents.c:2525 [inline] ext4_ext_rm_leaf fs/ext4/extents.c:2691 [inline] ext4_ext_remove_space+0x1698/0x39c4 fs/ext4/extents.c:2939 ext4_ext_truncate+0x164/0x20c fs/ext4/extents.c:4469 ext4_truncate+0x9dc/0x1078 fs/ext4/inode.c:4289 ext4_evict_inode+0xbf0/0x124c fs/ext4/inode.c:286 evict+0x3c8/0x810 fs/inode.c:705 iput_final fs/inode.c:1834 [inline] iput+0x764/0x7f4 fs/inode.c:1860 do_unlinkat+0x360/0x4e8 fs/namei.c:4397 __do_sys_unlinkat fs/namei.c:4433 [inline] __se_sys_unlinkat fs/namei.c:4426 [inline] __arm64_sys_unlinkat+0xe0/0xfc fs/namei.c:4426 __invoke_syscall arch/arm64/kernel/syscall.c:38 [inline] invoke_syscall+0x98/0x2bc arch/arm64/kernel/syscall.c:52 el0_svc_common+0x138/0x258 arch/arm64/kernel/syscall.c:140 do_el0_svc+0x58/0x13c arch/arm64/kernel/syscall.c:204 el0_svc+0x58/0x138 arch/arm64/kernel/entry-common.c:637 el0t_64_sync_handler+0x84/0xf0 arch/arm64/kernel/entry-common.c:655 el0t_64_sync+0x18c/0x190 arch/arm64/kernel/entry.S:585 -> #4 (&ei->i_data_sem){++++}-{3:3}: down_write+0x5c/0x88 kernel/locking/rwsem.c:1573 ext4_truncate+0x7bc/0x1078 fs/ext4/inode.c:4284 ext4_setattr+0xda8/0x150c fs/ext4/inode.c:5630 notify_change+0xb0c/0xdcc fs/attr.c:499 do_truncate+0x178/0x1f0 fs/open.c:65 do_sys_ftruncate+0x284/0x31c fs/open.c:193 __do_sys_ftruncate fs/open.c:204 [inline] __se_sys_ftruncate fs/open.c:202 [inline] __arm64_sys_ftruncate+0x60/0x74 fs/open.c:202 __invoke_syscall arch/arm64/kernel/syscall.c:38 [inline] invoke_syscall+0x98/0x2bc arch/arm64/kernel/syscall.c:52 el0_svc_common+0x138/0x258 arch/arm64/kernel/syscall.c:140 do_el0_svc+0x58/0x13c arch/arm64/kernel/syscall.c:204 el0_svc+0x58/0x138 arch/arm64/kernel/entry-common.c:637 el0t_64_sync_handler+0x84/0xf0 arch/arm64/kernel/entry-common.c:655 el0t_64_sync+0x18c/0x190 arch/arm64/kernel/entry.S:585 -> #3 (jbd2_handle){++++}-{0:0}: start_this_handle+0xfe0/0x122c fs/jbd2/transaction.c:463 jbd2__journal_start+0x288/0x51c fs/jbd2/transaction.c:520 jbd2_journal_start+0x3c/0x4c fs/jbd2/transaction.c:559 ocfs2_start_trans+0x380/0x6c4 fs/ocfs2/journal.c:354 ocfs2_mknod+0xc7c/0x1f18 fs/ocfs2/namei.c:361 vfs_mknod+0x3c4/0x44c fs/namei.c:3985 do_mknodat+0x320/0x54c fs/namei.c:-1 __do_sys_mknodat fs/namei.c:4063 [inline] __se_sys_mknodat fs/namei.c:4060 [inline] __arm64_sys_mknodat+0xb0/0xcc fs/namei.c:4060 __invoke_syscall arch/arm64/kernel/syscall.c:38 [inline] invoke_syscall+0x98/0x2bc arch/arm64/kernel/syscall.c:52 el0_svc_common+0x138/0x258 arch/arm64/kernel/syscall.c:140 do_el0_svc+0x58/0x13c arch/arm64/kernel/syscall.c:204 el0_svc+0x58/0x138 arch/arm64/kernel/entry-common.c:637 el0t_64_sync_handler+0x84/0xf0 arch/arm64/kernel/entry-common.c:655 el0t_64_sync+0x18c/0x190 arch/arm64/kernel/entry.S:585 -> #2 (&journal->j_trans_barrier){.+.+}-{3:3}: down_read+0x64/0x304 kernel/locking/rwsem.c:1520 ocfs2_start_trans+0x374/0x6c4 fs/ocfs2/journal.c:352 ocfs2_mknod+0xc7c/0x1f18 fs/ocfs2/namei.c:361 vfs_mknod+0x3c4/0x44c fs/namei.c:3985 do_mknodat+0x320/0x54c fs/namei.c:-1 __do_sys_mknodat fs/namei.c:4063 [inline] __se_sys_mknodat fs/namei.c:4060 [inline] __arm64_sys_mknodat+0xb0/0xcc fs/namei.c:4060 __invoke_syscall arch/arm64/kernel/syscall.c:38 [inline] invoke_syscall+0x98/0x2bc arch/arm64/kernel/syscall.c:52 el0_svc_common+0x138/0x258 arch/arm64/kernel/syscall.c:140 do_el0_svc+0x58/0x13c arch/arm64/kernel/syscall.c:204 el0_svc+0x58/0x138 arch/arm64/kernel/entry-common.c:637 el0t_64_sync_handler+0x84/0xf0 arch/arm64/kernel/entry-common.c:655 el0t_64_sync+0x18c/0x190 arch/arm64/kernel/entry.S:585 -> #1 (sb_internal#3){.+.+}-{0:0}: percpu_down_read include/linux/percpu-rwsem.h:51 [inline] __sb_start_write include/linux/fs.h:1891 [inline] sb_start_intwrite include/linux/fs.h:2013 [inline] ocfs2_start_trans+0x20c/0x6c4 fs/ocfs2/journal.c:350 ocfs2_write_info+0x114/0x324 fs/ocfs2/quota_global.c:982 dquot_set_dqinfo+0x370/0x5d8 fs/quota/dquot.c:2911 quota_setinfo+0x2f8/0x380 fs/quota/quota.c:174 do_quotactl+0x59c/0x738 fs/quota/quota.c:796 __do_sys_quotactl fs/quota/quota.c:960 [inline] __se_sys_quotactl fs/quota/quota.c:916 [inline] __arm64_sys_quotactl+0x2ac/0x730 fs/quota/quota.c:916 __invoke_syscall arch/arm64/kernel/syscall.c:38 [inline] invoke_syscall+0x98/0x2bc arch/arm64/kernel/syscall.c:52 el0_svc_common+0x138/0x258 arch/arm64/kernel/syscall.c:140 do_el0_svc+0x58/0x13c arch/arm64/kernel/syscall.c:204 el0_svc+0x58/0x138 arch/arm64/kernel/entry-common.c:637 el0t_64_sync_handler+0x84/0xf0 arch/arm64/kernel/entry-common.c:655 el0t_64_sync+0x18c/0x190 arch/arm64/kernel/entry.S:585 -> #0 (&ocfs2_quota_ip_alloc_sem_key){++++}-{3:3}: check_prev_add kernel/locking/lockdep.c:3090 [inline] check_prevs_add kernel/locking/lockdep.c:3209 [inline] validate_chain kernel/locking/lockdep.c:3825 [inline] __lock_acquire+0x293c/0x6544 kernel/locking/lockdep.c:5049 lock_acquire+0x20c/0x644 kernel/locking/lockdep.c:5662 down_write+0x5c/0x88 kernel/locking/rwsem.c:1573 ocfs2_lock_global_qf+0x1a8/0x22c fs/ocfs2/quota_global.c:314 ocfs2_acquire_dquot+0x268/0xac4 fs/ocfs2/quota_global.c:816 dqget+0x654/0xccc fs/quota/dquot.c:988 dquot_set_dqblk+0x40/0xe50 fs/quota/dquot.c:2833 quota_setquota+0x400/0x490 fs/quota/quota.c:310 do_quotactl+0x65c/0x738 fs/quota/quota.c:802 __do_sys_quotactl fs/quota/quota.c:960 [inline] __se_sys_quotactl fs/quota/quota.c:916 [inline] __arm64_sys_quotactl+0x2ac/0x730 fs/quota/quota.c:916 __invoke_syscall arch/arm64/kernel/syscall.c:38 [inline] invoke_syscall+0x98/0x2bc arch/arm64/kernel/syscall.c:52 el0_svc_common+0x138/0x258 arch/arm64/kernel/syscall.c:140 do_el0_svc+0x58/0x13c arch/arm64/kernel/syscall.c:204 el0_svc+0x58/0x138 arch/arm64/kernel/entry-common.c:637 el0t_64_sync_handler+0x84/0xf0 arch/arm64/kernel/entry-common.c:655 el0t_64_sync+0x18c/0x190 arch/arm64/kernel/entry.S:585 other info that might help us debug this: Chain exists of: &ocfs2_quota_ip_alloc_sem_key --> &dquot->dq_lock --> &ocfs2_sysfile_lock_key[args->fi_sysfile_type]#8 Possible unsafe locking scenario: CPU0 CPU1 ---- ---- lock(&ocfs2_sysfile_lock_key[args->fi_sysfile_type]#8); lock(&dquot->dq_lock); lock(&ocfs2_sysfile_lock_key[args->fi_sysfile_type]#8); lock(&ocfs2_quota_ip_alloc_sem_key); *** DEADLOCK *** 3 locks held by syz.2.3876/13098: #0: ffff0000d4e660e0 (&type->s_umount_key#62){++++}-{3:3}, at: user_get_super+0x118/0x234 fs/super.c:889 #1: ffff0000e22f20a8 (&dquot->dq_lock){+.+.}-{3:3}, at: ocfs2_acquire_dquot+0x25c/0xac4 fs/ocfs2/quota_global.c:811 #2: ffff0000e22a42c8 (&ocfs2_sysfile_lock_key[args->fi_sysfile_type]#8){+.+.}-{3:3}, at: inode_lock include/linux/fs.h:758 [inline] #2: ffff0000e22a42c8 (&ocfs2_sysfile_lock_key[args->fi_sysfile_type]#8){+.+.}-{3:3}, at: ocfs2_lock_global_qf+0x18c/0x22c fs/ocfs2/quota_global.c:313 stack backtrace: CPU: 0 PID: 13098 Comm: syz.2.3876 Not tainted 6.1.138-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2025 Call trace: dump_backtrace+0x1c8/0x1f4 arch/arm64/kernel/stacktrace.c:158 show_stack+0x2c/0x3c arch/arm64/kernel/stacktrace.c:165 __dump_stack+0x30/0x40 lib/dump_stack.c:88 dump_stack_lvl+0xf8/0x160 lib/dump_stack.c:106 dump_stack+0x1c/0x5c lib/dump_stack.c:113 print_circular_bug+0x148/0x1b0 kernel/locking/lockdep.c:2048 check_noncircular+0x240/0x2d4 kernel/locking/lockdep.c:2170 check_prev_add kernel/locking/lockdep.c:3090 [inline] check_prevs_add kernel/locking/lockdep.c:3209 [inline] validate_chain kernel/locking/lockdep.c:3825 [inline] __lock_acquire+0x293c/0x6544 kernel/locking/lockdep.c:5049 lock_acquire+0x20c/0x644 kernel/locking/lockdep.c:5662 down_write+0x5c/0x88 kernel/locking/rwsem.c:1573 ocfs2_lock_global_qf+0x1a8/0x22c fs/ocfs2/quota_global.c:314 ocfs2_acquire_dquot+0x268/0xac4 fs/ocfs2/quota_global.c:816 dqget+0x654/0xccc fs/quota/dquot.c:988 dquot_set_dqblk+0x40/0xe50 fs/quota/dquot.c:2833 quota_setquota+0x400/0x490 fs/quota/quota.c:310 do_quotactl+0x65c/0x738 fs/quota/quota.c:802 __do_sys_quotactl fs/quota/quota.c:960 [inline] __se_sys_quotactl fs/quota/quota.c:916 [inline] __arm64_sys_quotactl+0x2ac/0x730 fs/quota/quota.c:916 __invoke_syscall arch/arm64/kernel/syscall.c:38 [inline] invoke_syscall+0x98/0x2bc arch/arm64/kernel/syscall.c:52 el0_svc_common+0x138/0x258 arch/arm64/kernel/syscall.c:140 do_el0_svc+0x58/0x13c arch/arm64/kernel/syscall.c:204 el0_svc+0x58/0x138 arch/arm64/kernel/entry-common.c:637 el0t_64_sync_handler+0x84/0xf0 arch/arm64/kernel/entry-common.c:655 el0t_64_sync+0x18c/0x190 arch/arm64/kernel/entry.S:585