====================================================== WARNING: possible circular locking dependency detected syzkaller #0 Not tainted ------------------------------------------------------ syz-executor/4752 is trying to acquire lock: ffff888115e4b300 (&ocfs2_sysfile_lock_key[GLOBAL_BITMAP_SYSTEM_INODE]){+.+.}-{4:4}, at: inode_lock include/linux/fs.h:1027 [inline] ffff888115e4b300 (&ocfs2_sysfile_lock_key[GLOBAL_BITMAP_SYSTEM_INODE]){+.+.}-{4:4}, at: _ocfs2_reclaim_suballoc_to_main fs/ocfs2/suballoc.c:2757 [inline] ffff888115e4b300 (&ocfs2_sysfile_lock_key[GLOBAL_BITMAP_SYSTEM_INODE]){+.+.}-{4:4}, at: _ocfs2_free_suballoc_bits+0x60d/0xa40 fs/ocfs2/suballoc.c:2911 but task is already holding lock: ffff88810d9face8 (&journal->j_trans_barrier){.+.+}-{4:4}, at: ocfs2_start_trans+0x15e/0x2d0 fs/ocfs2/journal.c:372 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+0x2c/0xf0 kernel/locking/rwsem.c:1537 ocfs2_start_trans+0x15e/0x2d0 fs/ocfs2/journal.c:372 ocfs2_block_group_alloc fs/ocfs2/suballoc.c:754 [inline] ocfs2_reserve_suballoc_bits+0x308/0x1460 fs/ocfs2/suballoc.c:903 ocfs2_reserve_new_inode+0x12c/0x3d0 fs/ocfs2/suballoc.c:1143 ocfs2_mknod+0x2ad/0xf50 fs/ocfs2/namei.c:307 ocfs2_mkdir+0x66/0x160 fs/ocfs2/namei.c:660 vfs_mkdir+0x194/0x1d0 fs/namei.c:5130 do_mkdirat+0x135/0x260 fs/namei.c:5164 __do_sys_mkdirat fs/namei.c:5186 [inline] __se_sys_mkdirat fs/namei.c:5184 [inline] __x64_sys_mkdirat+0x27/0x40 fs/namei.c:5184 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xa6/0xf80 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f -> #1 (sb_internal#2){.+.+}-{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+0xfc/0x2d0 fs/ocfs2/journal.c:370 ocfs2_block_group_alloc fs/ocfs2/suballoc.c:754 [inline] ocfs2_reserve_suballoc_bits+0x308/0x1460 fs/ocfs2/suballoc.c:903 ocfs2_reserve_new_inode+0x12c/0x3d0 fs/ocfs2/suballoc.c:1143 ocfs2_mknod+0x2ad/0xf50 fs/ocfs2/namei.c:307 ocfs2_mkdir+0x66/0x160 fs/ocfs2/namei.c:660 vfs_mkdir+0x194/0x1d0 fs/namei.c:5130 do_mkdirat+0x135/0x260 fs/namei.c:5164 __do_sys_mkdirat fs/namei.c:5186 [inline] __se_sys_mkdirat fs/namei.c:5184 [inline] __x64_sys_mkdirat+0x27/0x40 fs/namei.c:5184 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xa6/0xf80 arch/x86/entry/syscall_64.c:94 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:3165 [inline] check_prevs_add kernel/locking/lockdep.c:3284 [inline] validate_chain kernel/locking/lockdep.c:3908 [inline] __lock_acquire+0x12e6/0x2100 kernel/locking/lockdep.c:5237 lock_acquire+0xe9/0x270 kernel/locking/lockdep.c:5868 down_write+0x29/0xc0 kernel/locking/rwsem.c:1590 inode_lock include/linux/fs.h:1027 [inline] _ocfs2_reclaim_suballoc_to_main fs/ocfs2/suballoc.c:2757 [inline] _ocfs2_free_suballoc_bits+0x60d/0xa40 fs/ocfs2/suballoc.c:2911 ocfs2_free_suballoc_bits fs/ocfs2/suballoc.c:2925 [inline] ocfs2_free_dinode+0x2c/0x40 fs/ocfs2/suballoc.c:2940 ocfs2_remove_inode fs/ocfs2/inode.c:774 [inline] ocfs2_wipe_inode fs/ocfs2/inode.c:896 [inline] ocfs2_delete_inode fs/ocfs2/inode.c:1157 [inline] ocfs2_evict_inode+0x110f/0x18c0 fs/ocfs2/inode.c:1299 evict+0x212/0x3e0 fs/inode.c:837 d_delete_notify include/linux/fsnotify.h:377 [inline] vfs_rmdir+0x12a/0x1f0 fs/namei.c:5249 do_rmdir+0x197/0x2b0 fs/namei.c:5291 __do_sys_unlinkat fs/namei.c:5468 [inline] __se_sys_unlinkat fs/namei.c:5462 [inline] __x64_sys_unlinkat+0x34/0x50 fs/namei.c:5462 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xa6/0xf80 arch/x86/entry/syscall_64.c:94 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#2 --> &journal->j_trans_barrier Possible unsafe locking scenario: CPU0 CPU1 ---- ---- rlock(&journal->j_trans_barrier); lock(sb_internal#2); lock(&journal->j_trans_barrier); lock(&ocfs2_sysfile_lock_key[GLOBAL_BITMAP_SYSTEM_INODE]); *** DEADLOCK *** 8 locks held by syz-executor/4752: #0: ffff8881182ad408 (sb_writers#12){.+.+}-{0:0}, at: mnt_want_write+0x11/0x40 fs/namespace.c:499 #1: ffff888115d909c0 (&type->i_mutex_dir_key#8/1){+.+.}-{4:4}, at: inode_lock_nested include/linux/fs.h:1072 [inline] #1: ffff888115d909c0 (&type->i_mutex_dir_key#8/1){+.+.}-{4:4}, at: __start_dirop fs/namei.c:2864 [inline] #1: ffff888115d909c0 (&type->i_mutex_dir_key#8/1){+.+.}-{4:4}, at: start_dirop fs/namei.c:2875 [inline] #1: ffff888115d909c0 (&type->i_mutex_dir_key#8/1){+.+.}-{4:4}, at: do_rmdir+0x13e/0x2b0 fs/namei.c:5284 #2: ffff88810cb7cbd0 (&osb->nfs_sync_rwlock){.+.+}-{4:4}, at: ocfs2_nfs_sync_lock+0x68/0x110 fs/ocfs2/dlmglue.c:2875 #3: ffff888115d92540 (&ocfs2_sysfile_lock_key[ORPHAN_DIR_SYSTEM_INODE]){+.+.}-{4:4}, at: inode_lock include/linux/fs.h:1027 [inline] #3: ffff888115d92540 (&ocfs2_sysfile_lock_key[ORPHAN_DIR_SYSTEM_INODE]){+.+.}-{4:4}, at: ocfs2_wipe_inode fs/ocfs2/inode.c:854 [inline] #3: ffff888115d92540 (&ocfs2_sysfile_lock_key[ORPHAN_DIR_SYSTEM_INODE]){+.+.}-{4:4}, at: ocfs2_delete_inode fs/ocfs2/inode.c:1157 [inline] #3: ffff888115d92540 (&ocfs2_sysfile_lock_key[ORPHAN_DIR_SYSTEM_INODE]){+.+.}-{4:4}, at: ocfs2_evict_inode+0x3e0/0x18c0 fs/ocfs2/inode.c:1299 #4: ffff888115d940c0 (&ocfs2_sysfile_lock_key[INODE_ALLOC_SYSTEM_INODE]){+.+.}-{4:4}, at: inode_lock include/linux/fs.h:1027 [inline] #4: ffff888115d940c0 (&ocfs2_sysfile_lock_key[INODE_ALLOC_SYSTEM_INODE]){+.+.}-{4:4}, at: ocfs2_remove_inode fs/ocfs2/inode.c:733 [inline] #4: ffff888115d940c0 (&ocfs2_sysfile_lock_key[INODE_ALLOC_SYSTEM_INODE]){+.+.}-{4:4}, at: ocfs2_wipe_inode fs/ocfs2/inode.c:896 [inline] #4: ffff888115d940c0 (&ocfs2_sysfile_lock_key[INODE_ALLOC_SYSTEM_INODE]){+.+.}-{4:4}, at: ocfs2_delete_inode fs/ocfs2/inode.c:1157 [inline] #4: ffff888115d940c0 (&ocfs2_sysfile_lock_key[INODE_ALLOC_SYSTEM_INODE]){+.+.}-{4:4}, at: ocfs2_evict_inode+0x71e/0x18c0 fs/ocfs2/inode.c:1299 #5: ffff8881182ad5f8 (sb_internal#2){.+.+}-{0:0}, at: ocfs2_remove_inode fs/ocfs2/inode.c:742 [inline] #5: ffff8881182ad5f8 (sb_internal#2){.+.+}-{0:0}, at: ocfs2_wipe_inode fs/ocfs2/inode.c:896 [inline] #5: ffff8881182ad5f8 (sb_internal#2){.+.+}-{0:0}, at: ocfs2_delete_inode fs/ocfs2/inode.c:1157 [inline] #5: ffff8881182ad5f8 (sb_internal#2){.+.+}-{0:0}, at: ocfs2_evict_inode+0x775/0x18c0 fs/ocfs2/inode.c:1299 #6: ffff88810d9face8 (&journal->j_trans_barrier){.+.+}-{4:4}, at: ocfs2_start_trans+0x15e/0x2d0 fs/ocfs2/journal.c:372 #7: ffff8881182ae950 (jbd2_handle#2){.+.+}-{0:0}, at: start_this_handle+0x814/0x8c0 fs/jbd2/transaction.c:444 stack backtrace: CPU: 0 UID: 0 PID: 4752 Comm: syz-executor Not tainted syzkaller #0 PREEMPT(full) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/25/2025 Call Trace: dump_stack_lvl+0xad/0x110 lib/dump_stack.c:120 print_circular_bug+0x29b/0x2b0 kernel/locking/lockdep.c:2043 check_noncircular+0x10e/0x130 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+0x12e6/0x2100 kernel/locking/lockdep.c:5237 lock_acquire+0xe9/0x270 kernel/locking/lockdep.c:5868 down_write+0x29/0xc0 kernel/locking/rwsem.c:1590 inode_lock include/linux/fs.h:1027 [inline] _ocfs2_reclaim_suballoc_to_main fs/ocfs2/suballoc.c:2757 [inline] _ocfs2_free_suballoc_bits+0x60d/0xa40 fs/ocfs2/suballoc.c:2911 ocfs2_free_suballoc_bits fs/ocfs2/suballoc.c:2925 [inline] ocfs2_free_dinode+0x2c/0x40 fs/ocfs2/suballoc.c:2940 ocfs2_remove_inode fs/ocfs2/inode.c:774 [inline] ocfs2_wipe_inode fs/ocfs2/inode.c:896 [inline] ocfs2_delete_inode fs/ocfs2/inode.c:1157 [inline] ocfs2_evict_inode+0x110f/0x18c0 fs/ocfs2/inode.c:1299 evict+0x212/0x3e0 fs/inode.c:837 d_delete_notify include/linux/fsnotify.h:377 [inline] vfs_rmdir+0x12a/0x1f0 fs/namei.c:5249 do_rmdir+0x197/0x2b0 fs/namei.c:5291 __do_sys_unlinkat fs/namei.c:5468 [inline] __se_sys_unlinkat fs/namei.c:5462 [inline] __x64_sys_unlinkat+0x34/0x50 fs/namei.c:5462 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xa6/0xf80 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f0b9938ed27 Code: 73 01 c3 48 c7 c1 a8 ff ff ff f7 d8 64 89 01 48 83 c8 ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 b8 07 01 00 00 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:00007fff2b2763d8 EFLAGS: 00000207 ORIG_RAX: 0000000000000107 RAX: ffffffffffffffda RBX: 0000000000000065 RCX: 00007f0b9938ed27 RDX: 0000000000000200 RSI: 00007fff2b277580 RDI: 00000000ffffff9c RBP: 00007f0b99413d7d R08: 0000555583abe66b R09: 0000000000000000 R10: 0000000000001000 R11: 0000000000000207 R12: 00007fff2b277580 R13: 00007f0b99413d7d R14: 000000000000f501 R15: 00007fff2b279740 ocfs2: Unmounting device (7,1) on (node local) ocfs2: Unmounting device (7,1) on (node local) ocfs2: Unmounting device (7,1) on (node local) ocfs2: Unmounting device (7,1) on (node local) ocfs2: Unmounting device (7,1) on (node local) ocfs2: Unmounting device (7,1) on (node local) ocfs2: Unmounting device (7,1) on (node local) ocfs2: Unmounting device (7,1) on (node local) ocfs2: Unmounting device (7,1) on (node local) ocfs2: Unmounting device (7,1) on (node local) ocfs2: Unmounting device (7,1) on (node local) ocfs2: Unmounting device (7,1) on (node local) ocfs2: Unmounting device (7,1) on (node local) ocfs2: Unmounting device (7,1) on (node local) ocfs2: Unmounting device (7,1) on (node local) ocfs2: Unmounting device (7,1) on (node local) ocfs2: Unmounting device (7,1) on (node local) ocfs2: Unmounting device (7,1) on (node local) ocfs2: Unmounting device (7,1) on (node local) ocfs2: Unmounting device (7,1) on (node local) ocfs2: Unmounting device (7,1) on (node local) ocfs2: Unmounting device (7,1) on (node local) ocfs2: Unmounting device (7,1) on (node local) ocfs2: Unmounting device (7,1) on (node local) ocfs2: Unmounting device (7,1) on (node local) ocfs2: Unmounting device (7,1) on (node local) ocfs2: Unmounting device (7,1) on (node local) ocfs2: Unmounting device (7,1) on (node local) ocfs2: Unmounting device (7,1) on (node local) ocfs2: Unmounting device (7,1) on (node local) ocfs2: Unmounting device (7,1) on (node local) ocfs2: Unmounting device (7,1) on (node local) ocfs2: Unmounting device (7,1) on (node local) ocfs2: Unmounting device (7,1) on (node local) ocfs2: Unmounting device (7,1) on (node local) ocfs2: Unmounting device (7,1) on (node local) ocfs2: Unmounting device (7,1) on (node local) ocfs2: Unmounting device (7,1) on (node local) ocfs2: Unmounting device (7,1) on (node local) ocfs2: Unmounting device (7,1) on (node local) ocfs2: Unmounting device (7,1) on (node local) ocfs2: Unmounting device (7,1) on (node local) ocfs2: Unmounting device (7,1) on (node local) ocfs2: Unmounting device (7,1) on (node local) ocfs2: Unmounting device (7,1) on (node local) ocfs2: Unmounting device (7,1) on (node local) ocfs2: Unmounting device (7,1) on (node local) ocfs2: Unmounting device (7,1) on (node local) ocfs2: Unmounting device (7,1) on (node local) ocfs2: Unmounting device (7,1) on (node local) ocfs2: Unmounting device (7,1) on (node local) ocfs2: Unmounting device (7,1) on (node local) ocfs2: Unmounting device (7,1) on (node local) ocfs2: Unmounting device (7,1) on (node local) ocfs2: Unmounting device (7,1) on (node local) ocfs2: Unmounting device (7,1) on (node local) ocfs2: Unmounting device (7,1) on (node local) ocfs2: Unmounting device (7,1) on (node local) ocfs2: Unmounting device (7,1) on (node local) ocfs2: Unmounting device (7,1) on (node local) ocfs2: Unmounting device (7,1) on (node local) ocfs2: Unmounting device (7,1) on (node local) ocfs2: Unmounting device (7,1) on (node local) ocfs2: Unmounting device (7,1) on (node local) ocfs2: Unmounting device (7,1) on (node local) ocfs2: Unmounting device (7,1) on (node local) ocfs2: Unmounting device (7,1) on (node local) ocfs2: Unmounting device (7,1) on (node local) ocfs2: Unmounting device (7,1) on (node local) ocfs2: Unmounting device (7,1) on (node local) ocfs2: Unmounting device (7,1) on (node local) ocfs2: Unmounting device (7,1) on (node local) ocfs2: Unmounting device (7,1) on (node local) ocfs2: Unmounting device (7,1) on (node local) ocfs2: Unmounting device (7,1) on (node local) ocfs2: Unmounting device (7,1) on (node local) ocfs2: Unmounting device (7,1) on (node local) ocfs2: Unmounting device (7,1) on (node local) ocfs2: Unmounting device (7,1) on (node local) ocfs2: Unmounting device (7,1) on (node local) ocfs2: Unmounting device (7,1) on (node local) ocfs2: Unmounting device (7,1) on (node local) ocfs2: Unmounting device (7,1) on (node local) ocfs2: Unmounting device (7,1) on (node local) ocfs2: Unmounting device (7,1) on (node local) ocfs2: Unmounting device (7,1) on (node local)