====================================================== WARNING: possible circular locking dependency detected syzkaller #0 Not tainted ------------------------------------------------------ syz-executor/5828 is trying to acquire lock: ffff888057275f40 (&ocfs2_sysfile_lock_key[GLOBAL_BITMAP_SYSTEM_INODE]){+.+.}-{4:4}, at: inode_lock include/linux/fs.h:1028 [inline] ffff888057275f40 (&ocfs2_sysfile_lock_key[GLOBAL_BITMAP_SYSTEM_INODE]){+.+.}-{4:4}, at: _ocfs2_reclaim_suballoc_to_main fs/ocfs2/suballoc.c:2757 [inline] ffff888057275f40 (&ocfs2_sysfile_lock_key[GLOBAL_BITMAP_SYSTEM_INODE]){+.+.}-{4:4}, at: _ocfs2_free_suballoc_bits+0x14c3/0x27a0 fs/ocfs2/suballoc.c:2911 but task is already holding lock: ffff8880560404e8 (&journal->j_trans_barrier){.+.+}-{4:4}, at: ocfs2_start_trans+0x3ab/0x700 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+0x47/0x2e0 kernel/locking/rwsem.c:1537 ocfs2_start_trans+0x3ab/0x700 fs/ocfs2/journal.c:372 ocfs2_block_group_alloc fs/ocfs2/suballoc.c:754 [inline] ocfs2_reserve_suballoc_bits+0x7ae/0x4940 fs/ocfs2/suballoc.c:903 ocfs2_reserve_new_inode+0x4f8/0xd30 fs/ocfs2/suballoc.c:1143 ocfs2_mknod+0xa40/0x2290 fs/ocfs2/namei.c:307 ocfs2_mkdir+0x181/0x490 fs/ocfs2/namei.c:660 vfs_mkdir+0x413/0x630 fs/namei.c:5233 filename_mkdirat+0x285/0x510 fs/namei.c:5266 __do_sys_mkdir fs/namei.c:5293 [inline] __se_sys_mkdir+0x34/0x150 fs/namei.c:5290 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0x14d/0xf80 arch/x86/entry/syscall_64.c:94 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:370 ocfs2_block_group_alloc fs/ocfs2/suballoc.c:754 [inline] ocfs2_reserve_suballoc_bits+0x7ae/0x4940 fs/ocfs2/suballoc.c:903 ocfs2_reserve_new_inode+0x4f8/0xd30 fs/ocfs2/suballoc.c:1143 ocfs2_mknod+0xa40/0x2290 fs/ocfs2/namei.c:307 ocfs2_mkdir+0x181/0x490 fs/ocfs2/namei.c:660 vfs_mkdir+0x413/0x630 fs/namei.c:5233 filename_mkdirat+0x285/0x510 fs/namei.c:5266 __do_sys_mkdir fs/namei.c:5293 [inline] __se_sys_mkdir+0x34/0x150 fs/namei.c:5290 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0x14d/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+0x15a5/0x2cf0 kernel/locking/lockdep.c:5237 lock_acquire+0xf0/0x2e0 kernel/locking/lockdep.c:5868 down_write+0x96/0x200 kernel/locking/rwsem.c:1590 inode_lock include/linux/fs.h:1028 [inline] _ocfs2_reclaim_suballoc_to_main fs/ocfs2/suballoc.c:2757 [inline] _ocfs2_free_suballoc_bits+0x14c3/0x27a0 fs/ocfs2/suballoc.c:2911 ocfs2_free_suballoc_bits fs/ocfs2/suballoc.c:2925 [inline] ocfs2_free_dinode+0xb1/0xe0 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+0x1ebd/0x44e0 fs/ocfs2/inode.c:1299 evict+0x61e/0xb10 fs/inode.c:846 d_delete_notify include/linux/fsnotify.h:377 [inline] vfs_rmdir+0x42a/0x6e0 fs/namei.c:5351 filename_rmdir+0x292/0x520 fs/namei.c:5393 __do_sys_unlinkat fs/namei.c:5568 [inline] __se_sys_unlinkat+0x71/0x1a0 fs/namei.c:5561 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0x14d/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#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 *** 8 locks held by syz-executor/5828: #0: ffff888029bd6420 (sb_writers#15){.+.+}-{0:0}, at: mnt_want_write+0x41/0x90 fs/namespace.c:493 #1: ffff88805726b480 (&type->i_mutex_dir_key#11/1){+.+.}-{4:4}, at: inode_lock_nested include/linux/fs.h:1073 [inline] #1: ffff88805726b480 (&type->i_mutex_dir_key#11/1){+.+.}-{4:4}, at: __start_dirop fs/namei.c:2923 [inline] #1: ffff88805726b480 (&type->i_mutex_dir_key#11/1){+.+.}-{4:4}, at: start_dirop fs/namei.c:2934 [inline] #1: ffff88805726b480 (&type->i_mutex_dir_key#11/1){+.+.}-{4:4}, at: filename_rmdir+0x1cd/0x520 fs/namei.c:5386 #2: ffff888057b10bd0 (&osb->nfs_sync_rwlock){.+.+}-{4:4}, at: ocfs2_nfs_sync_lock+0x106/0x270 fs/ocfs2/dlmglue.c:2875 #3: ffff888057275100 (&ocfs2_sysfile_lock_key[ORPHAN_DIR_SYSTEM_INODE]){+.+.}-{4:4}, at: inode_lock include/linux/fs.h:1028 [inline] #3: ffff888057275100 (&ocfs2_sysfile_lock_key[ORPHAN_DIR_SYSTEM_INODE]){+.+.}-{4:4}, at: ocfs2_wipe_inode fs/ocfs2/inode.c:854 [inline] #3: ffff888057275100 (&ocfs2_sysfile_lock_key[ORPHAN_DIR_SYSTEM_INODE]){+.+.}-{4:4}, at: ocfs2_delete_inode fs/ocfs2/inode.c:1157 [inline] #3: ffff888057275100 (&ocfs2_sysfile_lock_key[ORPHAN_DIR_SYSTEM_INODE]){+.+.}-{4:4}, at: ocfs2_evict_inode+0xe97/0x44e0 fs/ocfs2/inode.c:1299 #4: ffff888057273480 (&ocfs2_sysfile_lock_key[INODE_ALLOC_SYSTEM_INODE]){+.+.}-{4:4}, at: inode_lock include/linux/fs.h:1028 [inline] #4: ffff888057273480 (&ocfs2_sysfile_lock_key[INODE_ALLOC_SYSTEM_INODE]){+.+.}-{4:4}, at: ocfs2_remove_inode fs/ocfs2/inode.c:733 [inline] #4: ffff888057273480 (&ocfs2_sysfile_lock_key[INODE_ALLOC_SYSTEM_INODE]){+.+.}-{4:4}, at: ocfs2_wipe_inode fs/ocfs2/inode.c:896 [inline] #4: ffff888057273480 (&ocfs2_sysfile_lock_key[INODE_ALLOC_SYSTEM_INODE]){+.+.}-{4:4}, at: ocfs2_delete_inode fs/ocfs2/inode.c:1157 [inline] #4: ffff888057273480 (&ocfs2_sysfile_lock_key[INODE_ALLOC_SYSTEM_INODE]){+.+.}-{4:4}, at: ocfs2_evict_inode+0x1539/0x44e0 fs/ocfs2/inode.c:1299 #5: ffff888029bd6610 (sb_internal#3){.+.+}-{0:0}, at: ocfs2_remove_inode fs/ocfs2/inode.c:742 [inline] #5: ffff888029bd6610 (sb_internal#3){.+.+}-{0:0}, at: ocfs2_wipe_inode fs/ocfs2/inode.c:896 [inline] #5: ffff888029bd6610 (sb_internal#3){.+.+}-{0:0}, at: ocfs2_delete_inode fs/ocfs2/inode.c:1157 [inline] #5: ffff888029bd6610 (sb_internal#3){.+.+}-{0:0}, at: ocfs2_evict_inode+0x161f/0x44e0 fs/ocfs2/inode.c:1299 #6: ffff8880560404e8 (&journal->j_trans_barrier){.+.+}-{4:4}, at: ocfs2_start_trans+0x3ab/0x700 fs/ocfs2/journal.c:372 #7: ffff8880311fa950 (jbd2_handle#2){.+.+}-{0:0}, at: start_this_handle+0x2054/0x2290 fs/jbd2/transaction.c:444 stack backtrace: CPU: 0 UID: 0 PID: 5828 Comm: syz-executor Not tainted syzkaller #0 PREEMPT(full) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/24/2026 Call Trace: dump_stack_lvl+0xe8/0x150 lib/dump_stack.c:120 print_circular_bug+0x2e1/0x300 kernel/locking/lockdep.c:2043 check_noncircular+0x12e/0x150 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+0x15a5/0x2cf0 kernel/locking/lockdep.c:5237 lock_acquire+0xf0/0x2e0 kernel/locking/lockdep.c:5868 down_write+0x96/0x200 kernel/locking/rwsem.c:1590 inode_lock include/linux/fs.h:1028 [inline] _ocfs2_reclaim_suballoc_to_main fs/ocfs2/suballoc.c:2757 [inline] _ocfs2_free_suballoc_bits+0x14c3/0x27a0 fs/ocfs2/suballoc.c:2911 ocfs2_free_suballoc_bits fs/ocfs2/suballoc.c:2925 [inline] ocfs2_free_dinode+0xb1/0xe0 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+0x1ebd/0x44e0 fs/ocfs2/inode.c:1299 evict+0x61e/0xb10 fs/inode.c:846 d_delete_notify include/linux/fsnotify.h:377 [inline] vfs_rmdir+0x42a/0x6e0 fs/namei.c:5351 filename_rmdir+0x292/0x520 fs/namei.c:5393 __do_sys_unlinkat fs/namei.c:5568 [inline] __se_sys_unlinkat+0x71/0x1a0 fs/namei.c:5561 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0x14d/0xf80 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7fbf4c99b097 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:00007ffd938c86d8 EFLAGS: 00000207 ORIG_RAX: 0000000000000107 RAX: ffffffffffffffda RBX: 0000000000000065 RCX: 00007fbf4c99b097 RDX: 0000000000000200 RSI: 00007ffd938c9880 RDI: 00000000ffffff9c RBP: 00007fbf4ca31c3b R08: 0000000000008560 R09: 0000000000000001 R10: 0000000000000000 R11: 0000000000000207 R12: 00007ffd938c9880 R13: 00007fbf4ca31c3b R14: 0000000000017c42 R15: 00007ffd938cba40 ocfs2: Unmounting device (7,3) on (node local)