====================================================== WARNING: possible circular locking dependency detected syzkaller #0 Not tainted ------------------------------------------------------ syz.4.338/5639 is trying to acquire lock: ffff0000dc366990 (jbd2_handle){++++}-{0:0}, at: jbd2_journal_lock_updates+0x80/0x314 fs/jbd2/transaction.c:879 but task is already holding lock: ffff0000e256d108 (&ocfs2_sysfile_lock_key[args->fi_sysfile_type]#8){+.+.}-{3:3}, at: inode_lock include/linux/fs.h:758 [inline] ffff0000e256d108 (&ocfs2_sysfile_lock_key[args->fi_sysfile_type]#8){+.+.}-{3:3}, at: ocfs2_flush_truncate_log+0x40/0x68 fs/ocfs2/alloc.c:6075 which lock already depends on the new lock. the existing dependency chain (in reverse order) is: -> #4 (&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_remove_btree_range+0x514/0x1260 fs/ocfs2/alloc.c:5742 ocfs2_commit_truncate+0x838/0x1908 fs/ocfs2/alloc.c:7353 ocfs2_truncate_file+0xc48/0x14f8 fs/ocfs2/file.c:505 ocfs2_setattr+0x1288/0x1930 fs/ocfs2/file.c:1212 notify_change+0xb0c/0xdcc fs/attr.c:499 do_truncate+0x188/0x20c fs/open.c:65 handle_truncate fs/namei.c:3293 [inline] do_open fs/namei.c:3638 [inline] path_openat+0x2110/0x26bc fs/namei.c:3791 do_filp_open+0x194/0x384 fs/namei.c:3818 do_sys_openat2+0x134/0x3f4 fs/open.c:1320 do_sys_open fs/open.c:1336 [inline] __do_sys_openat fs/open.c:1352 [inline] __se_sys_openat fs/open.c:1347 [inline] __arm64_sys_openat+0x118/0x14c fs/open.c:1347 __invoke_syscall arch/arm64/kernel/syscall.c:38 [inline] invoke_syscall+0x98/0x290 arch/arm64/kernel/syscall.c:52 el0_svc_common+0x138/0x258 arch/arm64/kernel/syscall.c:140 do_el0_svc+0x58/0x130 arch/arm64/kernel/syscall.c:204 el0_svc+0x58/0x128 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 (&ocfs2_quota_ip_alloc_sem_key){++++}-{3:3}: down_write+0x5c/0x88 kernel/locking/rwsem.c:1573 ocfs2_create_local_dquot+0x144/0x13d4 fs/ocfs2/quota_local.c:1224 ocfs2_acquire_dquot+0x6f4/0xac8 fs/ocfs2/quota_global.c:871 dqget+0x614/0xab8 fs/quota/dquot.c:1010 ocfs2_setattr+0xc24/0x1930 fs/ocfs2/file.c:1233 notify_change+0xb0c/0xdcc fs/attr.c:499 chown_common+0x420/0x594 fs/open.c:736 vfs_fchown fs/open.c:804 [inline] ksys_fchown+0xe0/0x158 fs/open.c:815 __do_sys_fchown fs/open.c:823 [inline] __se_sys_fchown fs/open.c:821 [inline] __arm64_sys_fchown+0x7c/0x94 fs/open.c:821 __invoke_syscall arch/arm64/kernel/syscall.c:38 [inline] invoke_syscall+0x98/0x290 arch/arm64/kernel/syscall.c:52 el0_svc_common+0x138/0x258 arch/arm64/kernel/syscall.c:140 do_el0_svc+0x58/0x130 arch/arm64/kernel/syscall.c:204 el0_svc+0x58/0x128 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 (&dquot->dq_lock){+.+.}-{3:3}: __mutex_lock_common+0x190/0x1f60 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:532 ext4_write_dquot+0x1b4/0x31c fs/ext4/super.c:6817 ext4_mark_dquot_dirty+0xe8/0x140 fs/ext4/super.c:6894 mark_dquot_dirty fs/quota/dquot.c:397 [inline] mark_all_dquot_dirty+0x108/0x424 fs/quota/dquot.c:437 __dquot_alloc_space+0x560/0xce0 fs/quota/dquot.c:1774 dquot_alloc_space_nodirty include/linux/quotaops.h:293 [inline] dquot_alloc_space include/linux/quotaops.h:306 [inline] dquot_alloc_block include/linux/quotaops.h:330 [inline] ext4_mb_new_blocks+0xd38/0x4254 fs/ext4/mballoc.c:5740 ext4_alloc_branch fs/ext4/indirect.c:340 [inline] ext4_ind_map_blocks+0xc88/0x1d08 fs/ext4/indirect.c:635 ext4_map_blocks+0x80c/0x1778 fs/ext4/inode.c:683 ext4_getblk+0x178/0x664 fs/ext4/inode.c:892 ext4_bread+0x3c/0x1a8 fs/ext4/inode.c:948 ext4_append+0x248/0x498 fs/ext4/namei.c:83 ext4_init_new_dir+0x264/0x4f0 fs/ext4/namei.c:3030 ext4_mkdir+0x3c8/0xa1c fs/ext4/namei.c:3076 vfs_mkdir+0x314/0x4d4 fs/namei.c:4114 do_mkdirat+0x1b8/0x3ec fs/namei.c:4139 __do_sys_mkdirat fs/namei.c:4154 [inline] __se_sys_mkdirat fs/namei.c:4152 [inline] __arm64_sys_mkdirat+0x90/0xa8 fs/namei.c:4152 __invoke_syscall arch/arm64/kernel/syscall.c:38 [inline] invoke_syscall+0x98/0x290 arch/arm64/kernel/syscall.c:52 el0_svc_common+0x138/0x258 arch/arm64/kernel/syscall.c:140 do_el0_svc+0x58/0x130 arch/arm64/kernel/syscall.c:204 el0_svc+0x58/0x128 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 (&ei->i_data_sem){++++}-{3:3}: down_write+0x5c/0x88 kernel/locking/rwsem.c:1573 ext4_map_blocks+0x7c4/0x1778 fs/ext4/inode.c:674 mpage_map_one_extent fs/ext4/inode.c:2436 [inline] mpage_map_and_submit_extent fs/ext4/inode.c:2489 [inline] ext4_writepages+0xdbc/0x28b4 fs/ext4/inode.c:2857 do_writepages+0x2b0/0x504 mm/page-writeback.c:2491 __writeback_single_inode+0x164/0x1554 fs/fs-writeback.c:1622 writeback_sb_inodes+0x858/0x143c fs/fs-writeback.c:1913 __writeback_inodes_wb+0x110/0x394 fs/fs-writeback.c:1984 wb_writeback+0x428/0xfcc fs/fs-writeback.c:2089 wb_check_background_flush fs/fs-writeback.c:2155 [inline] wb_do_writeback fs/fs-writeback.c:2243 [inline] wb_workfn+0xb38/0xe18 fs/fs-writeback.c:2270 process_one_work+0x7f8/0x13a4 kernel/workqueue.c:2292 worker_thread+0x8c4/0xfec kernel/workqueue.c:2439 kthread+0x250/0x2d8 kernel/kthread.c:376 ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:850 -> #0 (jbd2_handle){++++}-{0:0}: 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+0x2880/0x6800 kernel/locking/lockdep.c:5049 lock_acquire+0x20c/0x63c kernel/locking/lockdep.c:5662 jbd2_journal_lock_updates+0xa8/0x314 fs/jbd2/transaction.c:880 __ocfs2_flush_truncate_log+0x26c/0x10a8 fs/ocfs2/alloc.c:6029 ocfs2_flush_truncate_log+0x48/0x68 fs/ocfs2/alloc.c:6076 ocfs2_sync_fs+0x100/0x2c0 fs/ocfs2/super.c:402 sync_filesystem+0x1a0/0x218 fs/sync.c:66 ocfs2_remount+0xf0/0x940 fs/ocfs2/super.c:611 legacy_reconfigure+0xf8/0x110 fs/fs_context.c:655 reconfigure_super+0x1d4/0x79c fs/super.c:977 do_remount fs/namespace.c:2741 [inline] path_mount+0xbdc/0xe80 fs/namespace.c:3400 do_mount fs/namespace.c:3421 [inline] __do_sys_mount fs/namespace.c:3629 [inline] __se_sys_mount fs/namespace.c:3606 [inline] __arm64_sys_mount+0x49c/0x59c fs/namespace.c:3606 __invoke_syscall arch/arm64/kernel/syscall.c:38 [inline] invoke_syscall+0x98/0x290 arch/arm64/kernel/syscall.c:52 el0_svc_common+0x138/0x258 arch/arm64/kernel/syscall.c:140 do_el0_svc+0x58/0x130 arch/arm64/kernel/syscall.c:204 el0_svc+0x58/0x128 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: jbd2_handle --> &ocfs2_quota_ip_alloc_sem_key --> &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(&ocfs2_quota_ip_alloc_sem_key); lock(&ocfs2_sysfile_lock_key[args->fi_sysfile_type]#8); lock(jbd2_handle); *** DEADLOCK *** 2 locks held by syz.4.338/5639: #0: ffff0000f53800e0 (&type->s_umount_key#66){+.+.}-{3:3}, at: do_remount fs/namespace.c:2738 [inline] #0: ffff0000f53800e0 (&type->s_umount_key#66){+.+.}-{3:3}, at: path_mount+0xba4/0xe80 fs/namespace.c:3400 #1: ffff0000e256d108 (&ocfs2_sysfile_lock_key[args->fi_sysfile_type]#8){+.+.}-{3:3}, at: inode_lock include/linux/fs.h:758 [inline] #1: ffff0000e256d108 (&ocfs2_sysfile_lock_key[args->fi_sysfile_type]#8){+.+.}-{3:3}, at: ocfs2_flush_truncate_log+0x40/0x68 fs/ocfs2/alloc.c:6075 stack backtrace: CPU: 0 PID: 5639 Comm: syz.4.338 Not tainted syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/18/2026 Call trace: dump_backtrace+0x1c0/0x1ec 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+0xf4/0x15c 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+0x264/0x2f8 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+0x2880/0x6800 kernel/locking/lockdep.c:5049 lock_acquire+0x20c/0x63c kernel/locking/lockdep.c:5662 jbd2_journal_lock_updates+0xa8/0x314 fs/jbd2/transaction.c:880 __ocfs2_flush_truncate_log+0x26c/0x10a8 fs/ocfs2/alloc.c:6029 ocfs2_flush_truncate_log+0x48/0x68 fs/ocfs2/alloc.c:6076 ocfs2_sync_fs+0x100/0x2c0 fs/ocfs2/super.c:402 sync_filesystem+0x1a0/0x218 fs/sync.c:66 ocfs2_remount+0xf0/0x940 fs/ocfs2/super.c:611 legacy_reconfigure+0xf8/0x110 fs/fs_context.c:655 reconfigure_super+0x1d4/0x79c fs/super.c:977 do_remount fs/namespace.c:2741 [inline] path_mount+0xbdc/0xe80 fs/namespace.c:3400 do_mount fs/namespace.c:3421 [inline] __do_sys_mount fs/namespace.c:3629 [inline] __se_sys_mount fs/namespace.c:3606 [inline] __arm64_sys_mount+0x49c/0x59c fs/namespace.c:3606 __invoke_syscall arch/arm64/kernel/syscall.c:38 [inline] invoke_syscall+0x98/0x290 arch/arm64/kernel/syscall.c:52 el0_svc_common+0x138/0x258 arch/arm64/kernel/syscall.c:140 do_el0_svc+0x58/0x130 arch/arm64/kernel/syscall.c:204 el0_svc+0x58/0x128 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 (syz.4.338,5639,0):ocfs2_parse_options:1458 ERROR: Invalid heartbeat mount options