====================================================== WARNING: possible circular locking dependency detected syzkaller #0 Tainted: G L ------------------------------------------------------ syz.0.3302/20381 is trying to acquire lock: ffff888073be8610 (sb_internal#7){.+.+}-{0:0}, at: ocfs2_simple_size_update+0xd6/0x4a0 fs/ocfs2/file.c:322 but task is already holding lock: ffff888041e90660 (&ocfs2_quota_ip_alloc_sem_key){++++}-{4:4}, at: ocfs2_create_local_dquot+0x1a5/0x1af0 fs/ocfs2/quota_local.c:1227 which lock already depends on the new lock. the existing dependency chain (in reverse order) is: -> #3 (&ocfs2_quota_ip_alloc_sem_key){++++}-{4:4}: down_write+0x96/0x200 kernel/locking/rwsem.c:1590 ocfs2_lock_global_qf+0x201/0x290 fs/ocfs2/quota_global.c:314 ocfs2_acquire_dquot+0x3fa/0xb30 fs/ocfs2/quota_global.c:850 dqget+0x7b1/0xf10 fs/quota/dquot.c:980 __dquot_initialize+0x3ba/0xd30 fs/quota/dquot.c:1508 ocfs2_get_init_inode+0x147/0x1c0 fs/ocfs2/namei.c:206 ocfs2_mknod+0xa67/0x2290 fs/ocfs2/namei.c:314 ocfs2_create+0x195/0x490 fs/ocfs2/namei.c:677 vfs_create+0x2d1/0x460 fs/namei.c:4176 filename_mknodat+0x3e8/0x660 fs/namei.c:5142 __do_sys_mknod fs/namei.c:5179 [inline] __se_sys_mknod+0x3a/0x150 fs/namei.c:5176 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 -> #2 (&ocfs2_sysfile_lock_key[USER_QUOTA_SYSTEM_INODE]){+.+.}-{4:4}: down_write+0x96/0x200 kernel/locking/rwsem.c:1590 inode_lock include/linux/fs.h:1028 [inline] ocfs2_lock_global_qf+0x1da/0x290 fs/ocfs2/quota_global.c:313 ocfs2_acquire_dquot+0x3fa/0xb30 fs/ocfs2/quota_global.c:850 dqget+0x7b1/0xf10 fs/quota/dquot.c:980 __dquot_initialize+0x3ba/0xd30 fs/quota/dquot.c:1508 ocfs2_get_init_inode+0x147/0x1c0 fs/ocfs2/namei.c:206 ocfs2_mknod+0xa67/0x2290 fs/ocfs2/namei.c:314 ocfs2_create+0x195/0x490 fs/ocfs2/namei.c:677 vfs_create+0x2d1/0x460 fs/namei.c:4176 filename_mknodat+0x3e8/0x660 fs/namei.c:5142 __do_sys_mknod fs/namei.c:5179 [inline] __se_sys_mknod+0x3a/0x150 fs/namei.c:5176 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 (&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_metadata_blocks+0x415/0x9a0 fs/ocfs2/suballoc.c:1053 ocfs2_expand_inline_dir fs/ocfs2/dir.c:2866 [inline] ocfs2_extend_dir+0xcd3/0x4a70 fs/ocfs2/dir.c:3228 ocfs2_prepare_dir_for_insert+0x34af/0x5370 fs/ocfs2/dir.c:4346 ocfs2_symlink+0xb00/0x2680 fs/ocfs2/namei.c:1876 vfs_symlink+0x195/0x340 fs/namei.c:5615 filename_symlinkat+0x1cd/0x410 fs/namei.c:5640 __do_sys_symlinkat fs/namei.c:5660 [inline] __se_sys_symlinkat+0x4e/0x2b0 fs/namei.c:5655 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 (sb_internal#7){.+.+}-{0:0}: 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 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_simple_size_update+0xd6/0x4a0 fs/ocfs2/file.c:322 ocfs2_extend_local_quota_file fs/ocfs2/quota_local.c:1126 [inline] ocfs2_create_local_dquot+0x70d/0x1af0 fs/ocfs2/quota_local.c:1230 ocfs2_acquire_dquot+0x6d7/0xb30 fs/ocfs2/quota_global.c:888 dqget+0x7b1/0xf10 fs/quota/dquot.c:980 __dquot_initialize+0x3ba/0xd30 fs/quota/dquot.c:1508 ocfs2_get_init_inode+0x147/0x1c0 fs/ocfs2/namei.c:206 ocfs2_mknod+0xa67/0x2290 fs/ocfs2/namei.c:314 ocfs2_create+0x195/0x490 fs/ocfs2/namei.c:677 vfs_create+0x2d1/0x460 fs/namei.c:4176 filename_mknodat+0x3e8/0x660 fs/namei.c:5142 __do_sys_mknod fs/namei.c:5179 [inline] __se_sys_mknod+0x3a/0x150 fs/namei.c:5176 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: sb_internal#7 --> &ocfs2_sysfile_lock_key[USER_QUOTA_SYSTEM_INODE] --> &ocfs2_quota_ip_alloc_sem_key Possible unsafe locking scenario: CPU0 CPU1 ---- ---- lock(&ocfs2_quota_ip_alloc_sem_key); lock(&ocfs2_sysfile_lock_key[USER_QUOTA_SYSTEM_INODE]); lock(&ocfs2_quota_ip_alloc_sem_key); rlock(sb_internal#7); *** DEADLOCK *** 5 locks held by syz.0.3302/20381: #0: ffff888073be8420 (sb_writers#32){.+.+}-{0:0}, at: mnt_want_write+0x41/0x90 fs/namespace.c:493 #1: ffff88804a642640 (&type->i_mutex_dir_key#21/1){+.+.}-{4:4}, at: inode_lock_nested include/linux/fs.h:1073 [inline] #1: ffff88804a642640 (&type->i_mutex_dir_key#21/1){+.+.}-{4:4}, at: __start_dirop fs/namei.c:2923 [inline] #1: ffff88804a642640 (&type->i_mutex_dir_key#21/1){+.+.}-{4:4}, at: start_dirop fs/namei.c:2934 [inline] #1: ffff88804a642640 (&type->i_mutex_dir_key#21/1){+.+.}-{4:4}, at: filename_create+0x200/0x370 fs/namei.c:4922 #2: ffff888041fded80 (&ocfs2_sysfile_lock_key[INODE_ALLOC_SYSTEM_INODE]){+.+.}-{4:4}, at: inode_lock include/linux/fs.h:1028 [inline] #2: ffff888041fded80 (&ocfs2_sysfile_lock_key[INODE_ALLOC_SYSTEM_INODE]){+.+.}-{4:4}, at: ocfs2_reserve_suballoc_bits+0x16a/0x4940 fs/ocfs2/suballoc.c:857 #3: ffff888041f08ca8 (&dquot->dq_lock){+.+.}-{4:4}, at: ocfs2_acquire_dquot+0x271/0xb30 fs/ocfs2/quota_global.c:823 #4: ffff888041e90660 (&ocfs2_quota_ip_alloc_sem_key){++++}-{4:4}, at: ocfs2_create_local_dquot+0x1a5/0x1af0 fs/ocfs2/quota_local.c:1227 stack backtrace: CPU: 0 UID: 0 PID: 20381 Comm: syz.0.3302 Tainted: G L syzkaller #0 PREEMPT(full) Tainted: [L]=SOFTLOCKUP 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 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_simple_size_update+0xd6/0x4a0 fs/ocfs2/file.c:322 ocfs2_extend_local_quota_file fs/ocfs2/quota_local.c:1126 [inline] ocfs2_create_local_dquot+0x70d/0x1af0 fs/ocfs2/quota_local.c:1230 ocfs2_acquire_dquot+0x6d7/0xb30 fs/ocfs2/quota_global.c:888 dqget+0x7b1/0xf10 fs/quota/dquot.c:980 __dquot_initialize+0x3ba/0xd30 fs/quota/dquot.c:1508 ocfs2_get_init_inode+0x147/0x1c0 fs/ocfs2/namei.c:206 ocfs2_mknod+0xa67/0x2290 fs/ocfs2/namei.c:314 ocfs2_create+0x195/0x490 fs/ocfs2/namei.c:677 vfs_create+0x2d1/0x460 fs/namei.c:4176 filename_mknodat+0x3e8/0x660 fs/namei.c:5142 __do_sys_mknod fs/namei.c:5179 [inline] __se_sys_mknod+0x3a/0x150 fs/namei.c:5176 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: 0033:0x7f9666b9aeb9 Code: ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 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:00007f9667aaa028 EFLAGS: 00000246 ORIG_RAX: 0000000000000085 RAX: ffffffffffffffda RBX: 00007f9666e15fa0 RCX: 00007f9666b9aeb9 RDX: 0000000000000701 RSI: 0000000000000000 RDI: 0000200000000000 RBP: 00007f9666c08c1f R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007f9666e16038 R14: 00007f9666e15fa0 R15: 00007ffcd03cf288