====================================================== WARNING: possible circular locking dependency detected 5.15.185-syzkaller #0 Not tainted ------------------------------------------------------ syz.1.373/6276 is trying to acquire lock: ffff0000e92e14a0 (&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: ffff0000e92e1808 (&ocfs2_sysfile_lock_key[args->fi_sysfile_type]#6){+.+.}-{3:3}, at: inode_lock include/linux/fs.h:787 [inline] ffff0000e92e1808 (&ocfs2_sysfile_lock_key[args->fi_sysfile_type]#6){+.+.}-{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] #6){+.+.}-{3:3}: down_write+0xbc/0x12c kernel/locking/rwsem.c:1551 inode_lock include/linux/fs.h:787 [inline] ocfs2_lock_global_qf+0x18c/0x22c fs/ocfs2/quota_global.c:313 ocfs2_acquire_dquot+0x244/0xa2c fs/ocfs2/quota_global.c:816 dqget+0x658/0xcf4 fs/quota/dquot.c:988 __dquot_initialize+0x2d4/0xa80 fs/quota/dquot.c:1517 dquot_initialize+0x24/0x34 fs/quota/dquot.c:1579 ocfs2_get_init_inode+0x134/0x1a8 fs/ocfs2/namei.c:202 ocfs2_mknod+0x758/0x1e88 fs/ocfs2/namei.c:310 ocfs2_create+0x180/0x468 fs/ocfs2/namei.c:674 lookup_open fs/namei.c:3462 [inline] open_last_lookups fs/namei.c:3532 [inline] path_openat+0x1144/0x26e4 fs/namei.c:3739 do_filp_open+0x164/0x330 fs/namei.c:3769 do_sys_openat2+0x128/0x3d8 fs/open.c:1253 do_sys_open fs/open.c:1269 [inline] __do_sys_openat fs/open.c:1285 [inline] __se_sys_openat fs/open.c:1280 [inline] __arm64_sys_openat+0x120/0x154 fs/open.c:1280 __invoke_syscall arch/arm64/kernel/syscall.c:38 [inline] invoke_syscall+0x98/0x2b8 arch/arm64/kernel/syscall.c:52 el0_svc_common+0x138/0x258 arch/arm64/kernel/syscall.c:142 do_el0_svc+0x58/0x14c arch/arm64/kernel/syscall.c:181 el0_svc+0x78/0x1e0 arch/arm64/kernel/entry-common.c:608 el0t_64_sync_handler+0xcc/0xe4 arch/arm64/kernel/entry-common.c:626 el0t_64_sync+0x1a0/0x1a4 arch/arm64/kernel/entry.S:584 -> #5 (&dquot->dq_lock){+.+.}-{3:3}: __mutex_lock_common+0x194/0x1edc kernel/locking/mutex.c:596 __mutex_lock kernel/locking/mutex.c:729 [inline] mutex_lock_nested+0xac/0x11c kernel/locking/mutex.c:743 dquot_commit+0x50/0x1c4 fs/quota/dquot.c:507 ext4_write_dquot+0x1b4/0x31c fs/ext4/super.c:6180 ext4_mark_dquot_dirty+0xe8/0x140 fs/ext4/super.c:6257 mark_dquot_dirty fs/quota/dquot.c:372 [inline] mark_all_dquot_dirty+0x108/0x424 fs/quota/dquot.c:412 __dquot_alloc_space+0x560/0xd0c fs/quota/dquot.c:1752 dquot_alloc_space_nodirty include/linux/quotaops.h:297 [inline] dquot_alloc_space include/linux/quotaops.h:310 [inline] dquot_alloc_block include/linux/quotaops.h:334 [inline] ext4_mb_new_blocks+0xd30/0x4024 fs/ext4/mballoc.c:5739 ext4_ext_map_blocks+0xf70/0x5628 fs/ext4/extents.c:4339 ext4_map_blocks+0x7b8/0x167c fs/ext4/inode.c:673 _ext4_get_block+0x190/0x4ec fs/ext4/inode.c:816 ext4_get_block+0x4c/0x60 fs/ext4/inode.c:833 __block_write_begin_int+0x3e4/0x1588 fs/buffer.c:2012 __block_write_begin fs/buffer.c:2062 [inline] block_page_mkwrite+0x23c/0x2d4 fs/buffer.c:2525 ext4_page_mkwrite+0x364/0x10c8 fs/ext4/inode.c:6234 do_page_mkwrite+0x13c/0x358 mm/memory.c:2922 do_shared_fault mm/memory.c:4328 [inline] do_fault mm/memory.c:4396 [inline] handle_pte_fault mm/memory.c:4650 [inline] __handle_mm_fault mm/memory.c:4785 [inline] handle_mm_fault+0x1618/0x2950 mm/memory.c:4883 __do_page_fault arch/arm64/mm/fault.c:505 [inline] do_page_fault+0x694/0xad4 arch/arm64/mm/fault.c:605 do_translation_fault+0xe0/0x130 arch/arm64/mm/fault.c:686 do_mem_abort+0x6c/0x1ac arch/arm64/mm/fault.c:819 el1_abort+0x3c/0x5c arch/arm64/kernel/entry-common.c:358 el1h_64_sync_handler+0x80/0xcc arch/arm64/kernel/entry-common.c:418 el1h_64_sync+0x78/0x7c arch/arm64/kernel/entry.S:522 __arch_copy_to_user+0x104/0x218 arch/arm64/lib/copy_template.S:135 copy_to_iter include/linux/uio.h:155 [inline] get_random_bytes_user+0x188/0x31c drivers/char/random.c:474 __do_sys_getrandom drivers/char/random.c:1242 [inline] __se_sys_getrandom drivers/char/random.c:1215 [inline] __arm64_sys_getrandom+0x180/0x24c drivers/char/random.c:1215 __invoke_syscall arch/arm64/kernel/syscall.c:38 [inline] invoke_syscall+0x98/0x2b8 arch/arm64/kernel/syscall.c:52 el0_svc_common+0x138/0x258 arch/arm64/kernel/syscall.c:142 do_el0_svc+0x58/0x14c arch/arm64/kernel/syscall.c:181 el0_svc+0x78/0x1e0 arch/arm64/kernel/entry-common.c:608 el0t_64_sync_handler+0xcc/0xe4 arch/arm64/kernel/entry-common.c:626 el0t_64_sync+0x1a0/0x1a4 arch/arm64/kernel/entry.S:584 -> #4 (&ei->i_data_sem){++++}-{3:3}: down_write+0xbc/0x12c kernel/locking/rwsem.c:1551 ext4_truncate+0x7bc/0xf94 fs/ext4/inode.c:4245 ext4_setattr+0xc20/0x142c fs/ext4/inode.c:5582 notify_change+0xa08/0xcd8 fs/attr.c:505 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+0x98/0x2b8 arch/arm64/kernel/syscall.c:52 el0_svc_common+0x138/0x258 arch/arm64/kernel/syscall.c:142 do_el0_svc+0x58/0x14c arch/arm64/kernel/syscall.c:181 el0_svc+0x78/0x1e0 arch/arm64/kernel/entry-common.c:608 el0t_64_sync_handler+0xcc/0xe4 arch/arm64/kernel/entry-common.c:626 el0t_64_sync+0x1a0/0x1a4 arch/arm64/kernel/entry.S:584 -> #3 (jbd2_handle){++++}-{0:0}: start_this_handle+0xef4/0x11a4 fs/jbd2/transaction.c:464 jbd2__journal_start+0x28c/0x744 fs/jbd2/transaction.c:521 jbd2_journal_start+0x3c/0x4c fs/jbd2/transaction.c:560 ocfs2_start_trans+0x43c/0x794 fs/ocfs2/journal.c:376 ocfs2_shutdown_local_alloc+0x1ac/0x7e4 fs/ocfs2/localalloc.c:416 ocfs2_dismount_volume+0x1d4/0x8b4 fs/ocfs2/super.c:1885 ocfs2_put_super+0xec/0x308 fs/ocfs2/super.c:1610 generic_shutdown_super+0x130/0x2f0 fs/super.c:475 kill_block_super+0x70/0xdc fs/super.c:1427 deactivate_locked_super+0xb8/0x13c fs/super.c:335 deactivate_super+0xf8/0x118 fs/super.c:366 cleanup_mnt+0x3a4/0x458 fs/namespace.c:1139 __cleanup_mnt+0x20/0x30 fs/namespace.c:1146 task_work_run+0x12c/0x1e0 kernel/task_work.c:188 tracehook_notify_resume include/linux/tracehook.h:189 [inline] do_notify_resume+0x24b4/0x3128 arch/arm64/kernel/signal.c:949 prepare_exit_to_user_mode arch/arm64/kernel/entry-common.c:133 [inline] exit_to_user_mode arch/arm64/kernel/entry-common.c:138 [inline] el0_svc+0xf0/0x1e0 arch/arm64/kernel/entry-common.c:609 el0t_64_sync_handler+0xcc/0xe4 arch/arm64/kernel/entry-common.c:626 el0t_64_sync+0x1a0/0x1a4 arch/arm64/kernel/entry.S:584 -> #2 (&journal->j_trans_barrier){.+.+}-{3:3}: down_read+0xc0/0x390 kernel/locking/rwsem.c:1498 ocfs2_start_trans+0x430/0x794 fs/ocfs2/journal.c:374 ocfs2_shutdown_local_alloc+0x1ac/0x7e4 fs/ocfs2/localalloc.c:416 ocfs2_dismount_volume+0x1d4/0x8b4 fs/ocfs2/super.c:1885 ocfs2_put_super+0xec/0x308 fs/ocfs2/super.c:1610 generic_shutdown_super+0x130/0x2f0 fs/super.c:475 kill_block_super+0x70/0xdc fs/super.c:1427 deactivate_locked_super+0xb8/0x13c fs/super.c:335 deactivate_super+0xf8/0x118 fs/super.c:366 cleanup_mnt+0x3a4/0x458 fs/namespace.c:1139 __cleanup_mnt+0x20/0x30 fs/namespace.c:1146 task_work_run+0x12c/0x1e0 kernel/task_work.c:188 tracehook_notify_resume include/linux/tracehook.h:189 [inline] do_notify_resume+0x24b4/0x3128 arch/arm64/kernel/signal.c:949 prepare_exit_to_user_mode arch/arm64/kernel/entry-common.c:133 [inline] exit_to_user_mode arch/arm64/kernel/entry-common.c:138 [inline] el0_svc+0xf0/0x1e0 arch/arm64/kernel/entry-common.c:609 el0t_64_sync_handler+0xcc/0xe4 arch/arm64/kernel/entry-common.c:626 el0t_64_sync+0x1a0/0x1a4 arch/arm64/kernel/entry.S:584 -> #1 (sb_internal#5){.+.+}-{0:0}: percpu_down_read include/linux/percpu-rwsem.h:51 [inline] __sb_start_write include/linux/fs.h:1811 [inline] sb_start_intwrite include/linux/fs.h:1928 [inline] ocfs2_start_trans+0x2c4/0x794 fs/ocfs2/journal.c:372 ocfs2_write_info+0x114/0x324 fs/ocfs2/quota_global.c:982 dquot_set_dqinfo+0x370/0x5d8 fs/quota/dquot.c:2904 quota_setinfo+0x320/0x3a8 fs/quota/quota.c:173 do_quotactl+0x59c/0x738 fs/quota/quota.c:795 __do_sys_quotactl fs/quota/quota.c:959 [inline] __se_sys_quotactl fs/quota/quota.c:915 [inline] __arm64_sys_quotactl+0x2ac/0x734 fs/quota/quota.c:915 __invoke_syscall arch/arm64/kernel/syscall.c:38 [inline] invoke_syscall+0x98/0x2b8 arch/arm64/kernel/syscall.c:52 el0_svc_common+0x138/0x258 arch/arm64/kernel/syscall.c:142 do_el0_svc+0x58/0x14c arch/arm64/kernel/syscall.c:181 el0_svc+0x78/0x1e0 arch/arm64/kernel/entry-common.c:608 el0t_64_sync_handler+0xcc/0xe4 arch/arm64/kernel/entry-common.c:626 el0t_64_sync+0x1a0/0x1a4 arch/arm64/kernel/entry.S:584 -> #0 (&ocfs2_quota_ip_alloc_sem_key){++++}-{3:3}: check_prev_add kernel/locking/lockdep.c:3053 [inline] check_prevs_add kernel/locking/lockdep.c:3172 [inline] validate_chain kernel/locking/lockdep.c:3788 [inline] __lock_acquire+0x2928/0x651c kernel/locking/lockdep.c:5012 lock_acquire+0x1f4/0x620 kernel/locking/lockdep.c:5623 down_write+0xbc/0x12c kernel/locking/rwsem.c:1551 ocfs2_lock_global_qf+0x1a8/0x22c fs/ocfs2/quota_global.c:314 ocfs2_acquire_dquot+0x244/0xa2c fs/ocfs2/quota_global.c:816 dqget+0x658/0xcf4 fs/quota/dquot.c:988 __dquot_initialize+0x2d4/0xa80 fs/quota/dquot.c:1517 dquot_initialize+0x24/0x34 fs/quota/dquot.c:1579 ocfs2_get_init_inode+0x134/0x1a8 fs/ocfs2/namei.c:202 ocfs2_mknod+0x758/0x1e88 fs/ocfs2/namei.c:310 ocfs2_create+0x180/0x468 fs/ocfs2/namei.c:674 lookup_open fs/namei.c:3462 [inline] open_last_lookups fs/namei.c:3532 [inline] path_openat+0x1144/0x26e4 fs/namei.c:3739 do_filp_open+0x164/0x330 fs/namei.c:3769 do_sys_openat2+0x128/0x3d8 fs/open.c:1253 do_sys_open fs/open.c:1269 [inline] __do_sys_openat fs/open.c:1285 [inline] __se_sys_openat fs/open.c:1280 [inline] __arm64_sys_openat+0x120/0x154 fs/open.c:1280 __invoke_syscall arch/arm64/kernel/syscall.c:38 [inline] invoke_syscall+0x98/0x2b8 arch/arm64/kernel/syscall.c:52 el0_svc_common+0x138/0x258 arch/arm64/kernel/syscall.c:142 do_el0_svc+0x58/0x14c arch/arm64/kernel/syscall.c:181 el0_svc+0x78/0x1e0 arch/arm64/kernel/entry-common.c:608 el0t_64_sync_handler+0xcc/0xe4 arch/arm64/kernel/entry-common.c:626 el0t_64_sync+0x1a0/0x1a4 arch/arm64/kernel/entry.S:584 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]#6 Possible unsafe locking scenario: CPU0 CPU1 ---- ---- lock(&ocfs2_sysfile_lock_key[args->fi_sysfile_type]#6); lock(&dquot->dq_lock); lock(&ocfs2_sysfile_lock_key[args->fi_sysfile_type]#6); lock(&ocfs2_quota_ip_alloc_sem_key); *** DEADLOCK *** 5 locks held by syz.1.373/6276: #0: ffff0000cf0be460 (sb_writers#27){.+.+}-{0:0}, at: mnt_want_write+0x44/0x9c fs/namespace.c:377 #1: ffff0000df3b42c8 (&type->i_mutex_dir_key#18){+.+.}-{3:3}, at: inode_lock include/linux/fs.h:787 [inline] #1: ffff0000df3b42c8 (&type->i_mutex_dir_key#18){+.+.}-{3:3}, at: open_last_lookups fs/namei.c:3529 [inline] #1: ffff0000df3b42c8 (&type->i_mutex_dir_key#18){+.+.}-{3:3}, at: path_openat+0x5f4/0x26e4 fs/namei.c:3739 #2: ffff0000df096d88 (&ocfs2_sysfile_lock_key[args->fi_sysfile_type]#5){+.+.}-{3:3}, at: inode_lock include/linux/fs.h:787 [inline] #2: ffff0000df096d88 (&ocfs2_sysfile_lock_key[args->fi_sysfile_type]#5){+.+.}-{3:3}, at: ocfs2_reserve_suballoc_bits+0x12c/0x3a68 fs/ocfs2/suballoc.c:782 #3: ffff0000df0b20a8 (&dquot->dq_lock){+.+.}-{3:3}, at: ocfs2_acquire_dquot+0x238/0xa2c fs/ocfs2/quota_global.c:811 #4: ffff0000e92e1808 (&ocfs2_sysfile_lock_key[args->fi_sysfile_type]#6){+.+.}-{3:3}, at: inode_lock include/linux/fs.h:787 [inline] #4: ffff0000e92e1808 (&ocfs2_sysfile_lock_key[args->fi_sysfile_type]#6){+.+.}-{3:3}, at: ocfs2_lock_global_qf+0x18c/0x22c fs/ocfs2/quota_global.c:313 stack backtrace: CPU: 0 PID: 6276 Comm: syz.1.373 Not tainted 5.15.185-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025 Call trace: dump_backtrace+0x0/0x43c arch/arm64/kernel/stacktrace.c:152 show_stack+0x2c/0x3c arch/arm64/kernel/stacktrace.c:216 __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:2011 check_noncircular+0x240/0x2d4 kernel/locking/lockdep.c:2133 check_prev_add kernel/locking/lockdep.c:3053 [inline] check_prevs_add kernel/locking/lockdep.c:3172 [inline] validate_chain kernel/locking/lockdep.c:3788 [inline] __lock_acquire+0x2928/0x651c kernel/locking/lockdep.c:5012 lock_acquire+0x1f4/0x620 kernel/locking/lockdep.c:5623 down_write+0xbc/0x12c kernel/locking/rwsem.c:1551 ocfs2_lock_global_qf+0x1a8/0x22c fs/ocfs2/quota_global.c:314 ocfs2_acquire_dquot+0x244/0xa2c fs/ocfs2/quota_global.c:816 dqget+0x658/0xcf4 fs/quota/dquot.c:988 __dquot_initialize+0x2d4/0xa80 fs/quota/dquot.c:1517 dquot_initialize+0x24/0x34 fs/quota/dquot.c:1579 ocfs2_get_init_inode+0x134/0x1a8 fs/ocfs2/namei.c:202 ocfs2_mknod+0x758/0x1e88 fs/ocfs2/namei.c:310 ocfs2_create+0x180/0x468 fs/ocfs2/namei.c:674 lookup_open fs/namei.c:3462 [inline] open_last_lookups fs/namei.c:3532 [inline] path_openat+0x1144/0x26e4 fs/namei.c:3739 do_filp_open+0x164/0x330 fs/namei.c:3769 do_sys_openat2+0x128/0x3d8 fs/open.c:1253 do_sys_open fs/open.c:1269 [inline] __do_sys_openat fs/open.c:1285 [inline] __se_sys_openat fs/open.c:1280 [inline] __arm64_sys_openat+0x120/0x154 fs/open.c:1280 __invoke_syscall arch/arm64/kernel/syscall.c:38 [inline] invoke_syscall+0x98/0x2b8 arch/arm64/kernel/syscall.c:52 el0_svc_common+0x138/0x258 arch/arm64/kernel/syscall.c:142 do_el0_svc+0x58/0x14c arch/arm64/kernel/syscall.c:181 el0_svc+0x78/0x1e0 arch/arm64/kernel/entry-common.c:608 el0t_64_sync_handler+0xcc/0xe4 arch/arm64/kernel/entry-common.c:626 el0t_64_sync+0x1a0/0x1a4 arch/arm64/kernel/entry.S:584 (syz.1.373,6276,0):ocfs2_block_check_validate:402 ERROR: CRC32 failed: stored: 0x2c7b5077, computed 0x28030c75. Applying ECC. (syz.1.373,6276,0):ocfs2_block_check_validate:416 ERROR: Fixed CRC32 failed: stored: 0x2c7b5077, computed 0x28d1d8ae (syz.1.373,6276,0):ocfs2_read_quota_phys_block:160 ERROR: status = -5 (syz.1.373,6276,0):ocfs2_quota_read:201 ERROR: status = -5 Quota error (device loop1): find_tree_dqentry: Can't read quota tree block 5 Quota error (device loop1): qtree_read_dquot: Can't read quota structure for id 0 (syz.1.373,6276,0):ocfs2_acquire_dquot:878 ERROR: status = -5 (syz.1.373,6276,0):ocfs2_mknod:314 ERROR: status = -5 (syz.1.373,6276,0):ocfs2_mknod:502 ERROR: status = -5 (syz.1.373,6276,0):ocfs2_create:676 ERROR: status = -5