====================================================== WARNING: possible circular locking dependency detected syzkaller #0 Not tainted ------------------------------------------------------ syz-executor/5581 is trying to acquire lock: ffff88805dbd0b80 (&ocfs2_sysfile_lock_key[GLOBAL_BITMAP_SYSTEM_INODE]){+.+.}-{4:4}, at: inode_lock include/linux/fs.h:1024 [inline] ffff88805dbd0b80 (&ocfs2_sysfile_lock_key[GLOBAL_BITMAP_SYSTEM_INODE]){+.+.}-{4:4}, at: _ocfs2_reclaim_suballoc_to_main fs/ocfs2/suballoc.c:2804 [inline] ffff88805dbd0b80 (&ocfs2_sysfile_lock_key[GLOBAL_BITMAP_SYSTEM_INODE]){+.+.}-{4:4}, at: _ocfs2_free_suballoc_bits+0x1510/0x27a0 fs/ocfs2/suballoc.c:2958 but task is already holding lock: ffff888060753118 (&journal->j_trans_barrier){.+.+}-{4:4}, at: ocfs2_start_trans+0x3af/0x700 fs/ocfs2/journal.c:369 which lock already depends on the new lock. the existing dependency chain (in reverse order) is: -> #2 (&journal->j_trans_barrier){.+.+}-{4:4}: down_read+0x97/0x200 kernel/locking/rwsem.c:1574 ocfs2_start_trans+0x3af/0x700 fs/ocfs2/journal.c:369 ocfs2_modify_bh+0xe3/0x4d0 fs/ocfs2/quota_local.c:101 ocfs2_local_read_info+0x146b/0x1830 fs/ocfs2/quota_local.c:767 dquot_load_quota_sb+0x76f/0xb70 fs/quota/dquot.c:2416 dquot_load_quota_inode+0x2dc/0x5d0 fs/quota/dquot.c:2453 ocfs2_enable_quotas+0x1c3/0x4a0 fs/ocfs2/super.c:930 ocfs2_fill_super+0x5451/0x6950 fs/ocfs2/super.c:1140 get_tree_bdev_flags+0x430/0x4f0 fs/super.c:1872 vfs_get_tree+0x92/0x2a0 fs/super.c:1932 fc_mount fs/namespace.c:1282 [inline] do_new_mount_fc fs/namespace.c:3898 [inline] do_new_mount+0x325/0xb00 fs/namespace.c:3974 do_mount fs/namespace.c:4338 [inline] __do_sys_mount fs/namespace.c:4556 [inline] __se_sys_mount+0x31d/0x420 fs/namespace.c:4533 do_syscall_x64 arch/x86/entry/syscall_64.c:61 [inline] do_syscall_64+0x166/0x520 arch/x86/entry/syscall_64.c:84 entry_SYSCALL_64_after_hwframe+0x77/0x7f -> #1 (sb_internal#4){.+.+}-{0:0}: 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:367 ocfs2_block_group_alloc fs/ocfs2/suballoc.c:801 [inline] ocfs2_reserve_suballoc_bits+0x7b7/0x4850 fs/ocfs2/suballoc.c:950 ocfs2_reserve_new_metadata_blocks+0x415/0x9a0 fs/ocfs2/suballoc.c:1100 ocfs2_expand_inline_dir fs/ocfs2/dir.c:2928 [inline] ocfs2_extend_dir+0xd35/0x4b60 fs/ocfs2/dir.c:3290 ocfs2_prepare_dir_for_insert+0x339a/0x5190 fs/ocfs2/dir.c:4408 ocfs2_symlink+0xadd/0x25f0 fs/ocfs2/namei.c:1879 vfs_symlink+0x18b/0x330 fs/namei.c:5793 filename_symlinkat+0x1cd/0x420 fs/namei.c:5818 __do_sys_symlink fs/namei.c:5845 [inline] __se_sys_symlink+0x4d/0x2b0 fs/namei.c:5841 do_syscall_x64 arch/x86/entry/syscall_64.c:61 [inline] do_syscall_64+0x166/0x520 arch/x86/entry/syscall_64.c:84 entry_SYSCALL_64_after_hwframe+0x77/0x7f -> #0 (&ocfs2_sysfile_lock_key[GLOBAL_BITMAP_SYSTEM_INODE]){+.+.}-{4:4}: check_prev_add kernel/locking/lockdep.c:3209 [inline] check_prevs_add kernel/locking/lockdep.c:3328 [inline] validate_chain kernel/locking/lockdep.c:3952 [inline] __lock_acquire+0x164c/0x2de0 kernel/locking/lockdep.c:5288 lock_acquire+0x115/0x350 kernel/locking/lockdep.c:5942 down_write+0x3a/0x50 kernel/locking/rwsem.c:1631 inode_lock include/linux/fs.h:1024 [inline] _ocfs2_reclaim_suballoc_to_main fs/ocfs2/suballoc.c:2804 [inline] _ocfs2_free_suballoc_bits+0x1510/0x27a0 fs/ocfs2/suballoc.c:2958 ocfs2_free_suballoc_bits fs/ocfs2/suballoc.c:2972 [inline] ocfs2_free_dinode+0xb1/0xe0 fs/ocfs2/suballoc.c:2987 ocfs2_remove_inode fs/ocfs2/inode.c:808 [inline] ocfs2_wipe_inode fs/ocfs2/inode.c:930 [inline] ocfs2_delete_inode fs/ocfs2/inode.c:1191 [inline] ocfs2_evict_inode+0x1dee/0x4360 fs/ocfs2/inode.c:1333 evict+0x624/0xb50 fs/inode.c:822 d_delete_notify include/linux/fsnotify.h:381 [inline] vfs_rmdir+0x416/0x6b0 fs/namei.c:5527 filename_rmdir+0x292/0x520 fs/namei.c:5571 __do_sys_unlinkat fs/namei.c:5746 [inline] __se_sys_unlinkat+0x71/0x1a0 fs/namei.c:5739 do_syscall_x64 arch/x86/entry/syscall_64.c:61 [inline] do_syscall_64+0x166/0x520 arch/x86/entry/syscall_64.c:84 entry_SYSCALL_64_after_hwframe+0x77/0x7f other info that might help us debug this: Chain exists of: &ocfs2_sysfile_lock_key[GLOBAL_BITMAP_SYSTEM_INODE] --> sb_internal#4 --> &journal->j_trans_barrier Possible unsafe locking scenario: CPU0 CPU1 ---- ---- rlock(&journal->j_trans_barrier); lock(sb_internal#4); lock(&journal->j_trans_barrier); lock(&ocfs2_sysfile_lock_key[GLOBAL_BITMAP_SYSTEM_INODE]); *** DEADLOCK *** locks held by syz-executor/5581: 8, last CPU#1: #0: ffff888063538510 (sb_writers#21){.+.+}-{0:0}, at: mnt_want_write+0x41/0x90 fs/namespace.c:531 #1: ffff888061f90b80 (&type->i_mutex_dir_key#18/1){+.+.}-{4:4}, at: inode_lock_nested include/linux/fs.h:1069 [inline] #1: ffff888061f90b80 (&type->i_mutex_dir_key#18/1){+.+.}-{4:4}, at: __start_dirop fs/namei.c:2918 [inline] #1: ffff888061f90b80 (&type->i_mutex_dir_key#18/1){+.+.}-{4:4}, at: start_dirop fs/namei.c:2942 [inline] #1: ffff888061f90b80 (&type->i_mutex_dir_key#18/1){+.+.}-{4:4}, at: filename_rmdir+0x1cd/0x520 fs/namei.c:5564 #2: ffff88803e6b4e30 (&osb->nfs_sync_rwlock){.+.+}-{4:4}, at: ocfs2_nfs_sync_lock+0x106/0x270 fs/ocfs2/dlmglue.c:2875 #3: ffff888061f97000 (&ocfs2_sysfile_lock_key[ORPHAN_DIR_SYSTEM_INODE]){+.+.}-{4:4}, at: inode_lock include/linux/fs.h:1024 [inline] #3: ffff888061f97000 (&ocfs2_sysfile_lock_key[ORPHAN_DIR_SYSTEM_INODE]){+.+.}-{4:4}, at: ocfs2_wipe_inode fs/ocfs2/inode.c:888 [inline] #3: ffff888061f97000 (&ocfs2_sysfile_lock_key[ORPHAN_DIR_SYSTEM_INODE]){+.+.}-{4:4}, at: ocfs2_delete_inode fs/ocfs2/inode.c:1191 [inline] #3: ffff888061f97000 (&ocfs2_sysfile_lock_key[ORPHAN_DIR_SYSTEM_INODE]){+.+.}-{4:4}, at: ocfs2_evict_inode+0xe39/0x4360 fs/ocfs2/inode.c:1333 #4: ffff88805dbd3dc0 (&ocfs2_sysfile_lock_key[INODE_ALLOC_SYSTEM_INODE]){+.+.}-{4:4}, at: inode_lock include/linux/fs.h:1024 [inline] #4: ffff88805dbd3dc0 (&ocfs2_sysfile_lock_key[INODE_ALLOC_SYSTEM_INODE]){+.+.}-{4:4}, at: ocfs2_remove_inode fs/ocfs2/inode.c:767 [inline] #4: ffff88805dbd3dc0 (&ocfs2_sysfile_lock_key[INODE_ALLOC_SYSTEM_INODE]){+.+.}-{4:4}, at: ocfs2_wipe_inode fs/ocfs2/inode.c:930 [inline] #4: ffff88805dbd3dc0 (&ocfs2_sysfile_lock_key[INODE_ALLOC_SYSTEM_INODE]){+.+.}-{4:4}, at: ocfs2_delete_inode fs/ocfs2/inode.c:1191 [inline] #4: ffff88805dbd3dc0 (&ocfs2_sysfile_lock_key[INODE_ALLOC_SYSTEM_INODE]){+.+.}-{4:4}, at: ocfs2_evict_inode+0x1489/0x4360 fs/ocfs2/inode.c:1333 #5: ffff888063538800 (sb_internal#4){.+.+}-{0:0}, at: ocfs2_remove_inode fs/ocfs2/inode.c:776 [inline] #5: ffff888063538800 (sb_internal#4){.+.+}-{0:0}, at: ocfs2_wipe_inode fs/ocfs2/inode.c:930 [inline] #5: ffff888063538800 (sb_internal#4){.+.+}-{0:0}, at: ocfs2_delete_inode fs/ocfs2/inode.c:1191 [inline] #5: ffff888063538800 (sb_internal#4){.+.+}-{0:0}, at: ocfs2_evict_inode+0x156b/0x4360 fs/ocfs2/inode.c:1333 #6: ffff888060753118 (&journal->j_trans_barrier){.+.+}-{4:4}, at: ocfs2_start_trans+0x3af/0x700 fs/ocfs2/journal.c:369 #7: ffff8880132a2bb0 (jbd2_handle#2){.+.+}-{0:0}, at: start_this_handle+0x1fbf/0x2200 fs/jbd2/transaction.c:444 stack backtrace: CPU: 1 UID: 0 PID: 5581 Comm: syz-executor Not tainted syzkaller #0 PREEMPT_{RT,(full)} Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/16/2026 Call Trace: dump_stack_lvl+0xe8/0x150 lib/dump_stack.c:120 print_circular_bug+0x2e2/0x300 kernel/locking/lockdep.c:2087 check_noncircular+0x12f/0x150 kernel/locking/lockdep.c:2219 check_prev_add kernel/locking/lockdep.c:3209 [inline] check_prevs_add kernel/locking/lockdep.c:3328 [inline] validate_chain kernel/locking/lockdep.c:3952 [inline] __lock_acquire+0x164c/0x2de0 kernel/locking/lockdep.c:5288 lock_acquire+0x115/0x350 kernel/locking/lockdep.c:5942 down_write+0x3a/0x50 kernel/locking/rwsem.c:1631 inode_lock include/linux/fs.h:1024 [inline] _ocfs2_reclaim_suballoc_to_main fs/ocfs2/suballoc.c:2804 [inline] _ocfs2_free_suballoc_bits+0x1510/0x27a0 fs/ocfs2/suballoc.c:2958 ocfs2_free_suballoc_bits fs/ocfs2/suballoc.c:2972 [inline] ocfs2_free_dinode+0xb1/0xe0 fs/ocfs2/suballoc.c:2987 ocfs2_remove_inode fs/ocfs2/inode.c:808 [inline] ocfs2_wipe_inode fs/ocfs2/inode.c:930 [inline] ocfs2_delete_inode fs/ocfs2/inode.c:1191 [inline] ocfs2_evict_inode+0x1dee/0x4360 fs/ocfs2/inode.c:1333 evict+0x624/0xb50 fs/inode.c:822 d_delete_notify include/linux/fsnotify.h:381 [inline] vfs_rmdir+0x416/0x6b0 fs/namei.c:5527 filename_rmdir+0x292/0x520 fs/namei.c:5571 __do_sys_unlinkat fs/namei.c:5746 [inline] __se_sys_unlinkat+0x71/0x1a0 fs/namei.c:5739 do_syscall_x64 arch/x86/entry/syscall_64.c:61 [inline] do_syscall_64+0x166/0x520 arch/x86/entry/syscall_64.c:84 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f28ac45d677 Code: 77 01 c3 48 c7 c2 e8 ff ff ff f7 d8 64 89 02 b8 ff ff ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 b8 07 01 00 00 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:00007ffd289d5248 EFLAGS: 00000207 ORIG_RAX: 0000000000000107 RAX: ffffffffffffffda RBX: 0000000000000065 RCX: 00007f28ac45d677 RDX: 0000000000000200 RSI: 00007ffd289d63f0 RDI: 00000000ffffff9c RBP: 00007f28ac4f4f1b R08: 0000000000008560 R09: 0000000000000001 R10: 0000000000000000 R11: 0000000000000207 R12: 00007ffd289d63f0 R13: 00007f28ac4f4f1b R14: 0000000000000005 R15: 00007ffd289d85b0 ocfs2: Unmounting device (7,1) on (node local)