====================================================== WARNING: possible circular locking dependency detected syzkaller #0 Not tainted ------------------------------------------------------ syz-executor/6897 is trying to acquire lock: ffff88805f99ce80 (&ocfs2_sysfile_lock_key[GLOBAL_BITMAP_SYSTEM_INODE]){+.+.}-{4:4}, at: inode_lock include/linux/fs.h:1024 [inline] ffff88805f99ce80 (&ocfs2_sysfile_lock_key[GLOBAL_BITMAP_SYSTEM_INODE]){+.+.}-{4:4}, at: _ocfs2_reclaim_suballoc_to_main fs/ocfs2/suballoc.c:2804 [inline] ffff88805f99ce80 (&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: ffff8880388c9918 (&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_setattr+0x114b/0x1d10 fs/ocfs2/file.c:1263 notify_change+0xbb8/0xec0 fs/attr.c:556 chown_common+0x41c/0x640 fs/open.c:825 vfs_fchown fs/open.c:890 [inline] ksys_fchown+0xe9/0x160 fs/open.c:902 __do_sys_fchown fs/open.c:907 [inline] __se_sys_fchown fs/open.c:905 [inline] __x64_sys_fchown+0x7a/0x90 fs/open.c:905 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#3){.+.+}-{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_shutdown_local_alloc+0x1ef/0xa50 fs/ocfs2/localalloc.c:417 ocfs2_dismount_volume+0x1e2/0x820 fs/ocfs2/super.c:1824 generic_shutdown_super+0x13d/0x2d0 fs/super.c:769 kill_block_super+0x44/0xa0 fs/super.c:1918 deactivate_locked_super+0xbc/0x110 fs/super.c:603 cleanup_mnt+0x3d3/0x460 fs/namespace.c:1317 task_work_run+0x1d9/0x270 kernel/task_work.c:233 resume_user_mode_work include/linux/resume_user_mode.h:50 [inline] __exit_to_user_mode_loop kernel/entry/common.c:70 [inline] exit_to_user_mode_loop+0x204/0x770 kernel/entry/common.c:101 __exit_to_user_mode_prepare include/linux/irq-entry-common.h:207 [inline] syscall_exit_to_user_mode_prepare include/linux/irq-entry-common.h:230 [inline] syscall_exit_to_user_mode include/linux/entry-common.h:336 [inline] do_syscall_64+0x328/0x520 arch/x86/entry/syscall_64.c:89 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:3181 [inline] check_prevs_add kernel/locking/lockdep.c:3300 [inline] validate_chain kernel/locking/lockdep.c:3924 [inline] __lock_acquire+0x15ff/0x2e40 kernel/locking/lockdep.c:5254 lock_acquire+0x115/0x350 kernel/locking/lockdep.c:5908 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:5528 filename_rmdir+0x292/0x520 fs/namei.c:5572 __do_sys_unlinkat fs/namei.c:5747 [inline] __se_sys_unlinkat+0x71/0x1a0 fs/namei.c:5740 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#3 --> &journal->j_trans_barrier Possible unsafe locking scenario: CPU0 CPU1 ---- ---- rlock(&journal->j_trans_barrier); lock(sb_internal#3); lock(&journal->j_trans_barrier); lock(&ocfs2_sysfile_lock_key[GLOBAL_BITMAP_SYSTEM_INODE]); *** DEADLOCK *** locks held by syz-executor/6897: 8, last CPU#1: #0: ffff888060b6e510 (sb_writers#14){.+.+}-{0:0}, at: mnt_want_write+0x41/0x90 fs/namespace.c:494 #1: ffff888062c3ad00 (&type->i_mutex_dir_key#12/1){+.+.}-{4:4}, at: inode_lock_nested include/linux/fs.h:1069 [inline] #1: ffff888062c3ad00 (&type->i_mutex_dir_key#12/1){+.+.}-{4:4}, at: __start_dirop fs/namei.c:2918 [inline] #1: ffff888062c3ad00 (&type->i_mutex_dir_key#12/1){+.+.}-{4:4}, at: start_dirop fs/namei.c:2942 [inline] #1: ffff888062c3ad00 (&type->i_mutex_dir_key#12/1){+.+.}-{4:4}, at: filename_rmdir+0x1cd/0x520 fs/namei.c:5565 #2: ffff8880347ace30 (&osb->nfs_sync_rwlock){.+.+}-{4:4}, at: ocfs2_nfs_sync_lock+0x106/0x270 fs/ocfs2/dlmglue.c:2875 #3: ffff88805f99bdc0 (&ocfs2_sysfile_lock_key[ORPHAN_DIR_SYSTEM_INODE]){+.+.}-{4:4}, at: inode_lock include/linux/fs.h:1024 [inline] #3: ffff88805f99bdc0 (&ocfs2_sysfile_lock_key[ORPHAN_DIR_SYSTEM_INODE]){+.+.}-{4:4}, at: ocfs2_wipe_inode fs/ocfs2/inode.c:888 [inline] #3: ffff88805f99bdc0 (&ocfs2_sysfile_lock_key[ORPHAN_DIR_SYSTEM_INODE]){+.+.}-{4:4}, at: ocfs2_delete_inode fs/ocfs2/inode.c:1191 [inline] #3: ffff88805f99bdc0 (&ocfs2_sysfile_lock_key[ORPHAN_DIR_SYSTEM_INODE]){+.+.}-{4:4}, at: ocfs2_evict_inode+0xe39/0x4360 fs/ocfs2/inode.c:1333 #4: ffff888040a51c40 (&ocfs2_sysfile_lock_key[INODE_ALLOC_SYSTEM_INODE]){+.+.}-{4:4}, at: inode_lock include/linux/fs.h:1024 [inline] #4: ffff888040a51c40 (&ocfs2_sysfile_lock_key[INODE_ALLOC_SYSTEM_INODE]){+.+.}-{4:4}, at: ocfs2_remove_inode fs/ocfs2/inode.c:767 [inline] #4: ffff888040a51c40 (&ocfs2_sysfile_lock_key[INODE_ALLOC_SYSTEM_INODE]){+.+.}-{4:4}, at: ocfs2_wipe_inode fs/ocfs2/inode.c:930 [inline] #4: ffff888040a51c40 (&ocfs2_sysfile_lock_key[INODE_ALLOC_SYSTEM_INODE]){+.+.}-{4:4}, at: ocfs2_delete_inode fs/ocfs2/inode.c:1191 [inline] #4: ffff888040a51c40 (&ocfs2_sysfile_lock_key[INODE_ALLOC_SYSTEM_INODE]){+.+.}-{4:4}, at: ocfs2_evict_inode+0x1489/0x4360 fs/ocfs2/inode.c:1333 #5: ffff888060b6e800 (sb_internal#3){.+.+}-{0:0}, at: ocfs2_remove_inode fs/ocfs2/inode.c:776 [inline] #5: ffff888060b6e800 (sb_internal#3){.+.+}-{0:0}, at: ocfs2_wipe_inode fs/ocfs2/inode.c:930 [inline] #5: ffff888060b6e800 (sb_internal#3){.+.+}-{0:0}, at: ocfs2_delete_inode fs/ocfs2/inode.c:1191 [inline] #5: ffff888060b6e800 (sb_internal#3){.+.+}-{0:0}, at: ocfs2_evict_inode+0x156b/0x4360 fs/ocfs2/inode.c:1333 #6: ffff8880388c9918 (&journal->j_trans_barrier){.+.+}-{4:4}, at: ocfs2_start_trans+0x3af/0x700 fs/ocfs2/journal.c:369 #7: ffff88804556ebb0 (jbd2_handle#2){.+.+}-{0:0}, at: start_this_handle+0x1fbf/0x2200 fs/jbd2/transaction.c:444 stack backtrace: CPU: 1 UID: 0 PID: 6897 Comm: syz-executor Not tainted syzkaller #0 PREEMPT_{RT,(full)} Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/24/2026 Call Trace: dump_stack_lvl+0xe8/0x150 lib/dump_stack.c:120 print_circular_bug+0x2e2/0x300 kernel/locking/lockdep.c:2059 check_noncircular+0x12f/0x150 kernel/locking/lockdep.c:2191 check_prev_add kernel/locking/lockdep.c:3181 [inline] check_prevs_add kernel/locking/lockdep.c:3300 [inline] validate_chain kernel/locking/lockdep.c:3924 [inline] __lock_acquire+0x15ff/0x2e40 kernel/locking/lockdep.c:5254 lock_acquire+0x115/0x350 kernel/locking/lockdep.c:5908 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:5528 filename_rmdir+0x292/0x520 fs/namei.c:5572 __do_sys_unlinkat fs/namei.c:5747 [inline] __se_sys_unlinkat+0x71/0x1a0 fs/namei.c:5740 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: 0033:0x7f2666d3d277 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:00007ffddc09e678 EFLAGS: 00000207 ORIG_RAX: 0000000000000107 RAX: ffffffffffffffda RBX: 0000000000000065 RCX: 00007f2666d3d277 RDX: 0000000000000200 RSI: 00007ffddc09f820 RDI: 00000000ffffff9c RBP: 00007f2666dd4474 R08: 0000000000008560 R09: 0000000000000001 R10: 0000000000000000 R11: 0000000000000207 R12: 00007ffddc09f820 R13: 00007f2666dd4474 R14: 000000000007804b R15: 00007ffddc0a19e0 ocfs2: Unmounting device (7,5) on (node local)