ocfs2: Mounting device (7,4) on (node local, slot 0) with ordered data mode.
======================================================
WARNING: possible circular locking dependency detected
syzkaller #0 Tainted: G             L     
------------------------------------------------------
syz.4.256/8124 is trying to acquire lock:
ffff0000f3c21800 (&ocfs2_sysfile_lock_key[LOCAL_ALLOC_SYSTEM_INODE]){+.+.}-{4:4}, at: inode_lock include/linux/fs.h:1027 [inline]
ffff0000f3c21800 (&ocfs2_sysfile_lock_key[LOCAL_ALLOC_SYSTEM_INODE]){+.+.}-{4:4}, at: ocfs2_reserve_local_alloc_bits+0x104/0x26a8 fs/ocfs2/localalloc.c:636

but task is already holding lock:
ffff0000de9594a0 (&oi->ip_alloc_sem){++++}-{4:4}, at: __ocfs2_change_file_space+0x618/0xbc4 fs/ocfs2/file.c:2021

which lock already depends on the new lock.


the existing dependency chain (in reverse order) is:

-> #4 (&oi->ip_alloc_sem){++++}-{4:4}:
       down_read+0x58/0x308 kernel/locking/rwsem.c:1537
       ocfs2_xattr_ibody_find+0x100/0x668 fs/ocfs2/xattr.c:2719
       ocfs2_xattr_set_handle+0x2bc/0x5e4 fs/ocfs2/xattr.c:3533
       ocfs2_init_security_set+0xb4/0xd8 fs/ocfs2/xattr.c:7337
       ocfs2_mknod+0x104c/0x1cf0 fs/ocfs2/namei.c:423
       ocfs2_mkdir+0x178/0x474 fs/ocfs2/namei.c:660
       vfs_mkdir+0x408/0x48c fs/namei.c:5130
       do_mkdirat+0x238/0x448 fs/namei.c:5164
       __do_sys_mkdirat fs/namei.c:5186 [inline]
       __se_sys_mkdirat fs/namei.c:5184 [inline]
       __arm64_sys_mkdirat+0x8c/0xa4 fs/namei.c:5184
       __invoke_syscall arch/arm64/kernel/syscall.c:35 [inline]
       invoke_syscall+0x98/0x254 arch/arm64/kernel/syscall.c:49
       el0_svc_common+0xe8/0x23c arch/arm64/kernel/syscall.c:132
       do_el0_svc+0x48/0x58 arch/arm64/kernel/syscall.c:151
       el0_svc+0x5c/0x26c arch/arm64/kernel/entry-common.c:724
       el0t_64_sync_handler+0x84/0x12c arch/arm64/kernel/entry-common.c:743
       el0t_64_sync+0x198/0x19c arch/arm64/kernel/entry.S:596

-> #3 (&oi->ip_xattr_sem){++++}-{4:4}:
       down_read+0x58/0x308 kernel/locking/rwsem.c:1537
       ocfs2_init_acl+0x258/0x63c fs/ocfs2/acl.c:367
       ocfs2_mknod+0x1008/0x1cf0 fs/ocfs2/namei.c:414
       ocfs2_mkdir+0x178/0x474 fs/ocfs2/namei.c:660
       vfs_mkdir+0x408/0x48c fs/namei.c:5130
       do_mkdirat+0x238/0x448 fs/namei.c:5164
       __do_sys_mkdirat fs/namei.c:5186 [inline]
       __se_sys_mkdirat fs/namei.c:5184 [inline]
       __arm64_sys_mkdirat+0x8c/0xa4 fs/namei.c:5184
       __invoke_syscall arch/arm64/kernel/syscall.c:35 [inline]
       invoke_syscall+0x98/0x254 arch/arm64/kernel/syscall.c:49
       el0_svc_common+0xe8/0x23c arch/arm64/kernel/syscall.c:132
       do_el0_svc+0x48/0x58 arch/arm64/kernel/syscall.c:151
       el0_svc+0x5c/0x26c arch/arm64/kernel/entry-common.c:724
       el0t_64_sync_handler+0x84/0x12c arch/arm64/kernel/entry-common.c:743
       el0t_64_sync+0x198/0x19c arch/arm64/kernel/entry.S:596

-> #2 (&journal->j_trans_barrier){.+.+}-{4:4}:
       down_read+0x58/0x308 kernel/locking/rwsem.c:1537
       ocfs2_start_trans+0x35c/0x6b0 fs/ocfs2/journal.c:372
       ocfs2_shutdown_local_alloc+0x1ac/0x7e4 fs/ocfs2/localalloc.c:417
       ocfs2_dismount_volume+0x1cc/0x8c4 fs/ocfs2/super.c:1825
       ocfs2_put_super+0xd4/0x320 fs/ocfs2/super.c:1553
       generic_shutdown_super+0x12c/0x2b8 fs/super.c:643
       kill_block_super+0x44/0x90 fs/super.c:1722
       deactivate_locked_super+0xc4/0x12c fs/super.c:474
       deactivate_super+0xe0/0x100 fs/super.c:507
       cleanup_mnt+0x31c/0x3ac fs/namespace.c:1318
       __cleanup_mnt+0x20/0x30 fs/namespace.c:1325
       task_work_run+0x1dc/0x260 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:44 [inline]
       exit_to_user_mode_loop+0x10c/0x18c kernel/entry/common.c:75
       __exit_to_user_mode_prepare include/linux/irq-entry-common.h:226 [inline]
       exit_to_user_mode_prepare_legacy include/linux/irq-entry-common.h:242 [inline]
       arm64_exit_to_user_mode arch/arm64/kernel/entry-common.c:81 [inline]
       el0_svc+0x17c/0x26c arch/arm64/kernel/entry-common.c:725
       el0t_64_sync_handler+0x84/0x12c arch/arm64/kernel/entry-common.c:743
       el0t_64_sync+0x198/0x19c arch/arm64/kernel/entry.S:596

-> #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+0x1f4/0x6b0 fs/ocfs2/journal.c:370
       ocfs2_mknod+0xc30/0x1cf0 fs/ocfs2/namei.c:365
       ocfs2_mkdir+0x178/0x474 fs/ocfs2/namei.c:660
       vfs_mkdir+0x408/0x48c fs/namei.c:5130
       do_mkdirat+0x238/0x448 fs/namei.c:5164
       __do_sys_mkdirat fs/namei.c:5186 [inline]
       __se_sys_mkdirat fs/namei.c:5184 [inline]
       __arm64_sys_mkdirat+0x8c/0xa4 fs/namei.c:5184
       __invoke_syscall arch/arm64/kernel/syscall.c:35 [inline]
       invoke_syscall+0x98/0x254 arch/arm64/kernel/syscall.c:49
       el0_svc_common+0xe8/0x23c arch/arm64/kernel/syscall.c:132
       do_el0_svc+0x48/0x58 arch/arm64/kernel/syscall.c:151
       el0_svc+0x5c/0x26c arch/arm64/kernel/entry-common.c:724
       el0t_64_sync_handler+0x84/0x12c arch/arm64/kernel/entry-common.c:743
       el0t_64_sync+0x198/0x19c arch/arm64/kernel/entry.S:596

-> #0 (&ocfs2_sysfile_lock_key[LOCAL_ALLOC_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+0x1774/0x30a4 kernel/locking/lockdep.c:5237
       lock_acquire+0x140/0x2e0 kernel/locking/lockdep.c:5868
       down_write+0x50/0xc0 kernel/locking/rwsem.c:1590
       inode_lock include/linux/fs.h:1027 [inline]
       ocfs2_reserve_local_alloc_bits+0x104/0x26a8 fs/ocfs2/localalloc.c:636
       ocfs2_reserve_clusters_with_limit+0x198/0x9e0 fs/ocfs2/suballoc.c:1169
       ocfs2_reserve_clusters fs/ocfs2/suballoc.c:1230 [inline]
       ocfs2_lock_allocators+0x27c/0x518 fs/ocfs2/suballoc.c:2783
       ocfs2_extend_allocation+0x328/0x14cc fs/ocfs2/file.c:589
       ocfs2_allocate_unwritten_extents+0x26c/0x698 fs/ocfs2/file.c:1502
       __ocfs2_change_file_space+0x744/0xbc4 fs/ocfs2/file.c:2029
       ocfs2_fallocate+0x1f0/0x224 fs/ocfs2/file.c:2144
       vfs_fallocate+0x52c/0x668 fs/open.c:339
       ksys_fallocate fs/open.c:363 [inline]
       __do_sys_fallocate fs/open.c:368 [inline]
       __se_sys_fallocate fs/open.c:366 [inline]
       __arm64_sys_fallocate+0xbc/0x10c fs/open.c:366
       __invoke_syscall arch/arm64/kernel/syscall.c:35 [inline]
       invoke_syscall+0x98/0x254 arch/arm64/kernel/syscall.c:49
       el0_svc_common+0xe8/0x23c arch/arm64/kernel/syscall.c:132
       do_el0_svc+0x48/0x58 arch/arm64/kernel/syscall.c:151
       el0_svc+0x5c/0x26c arch/arm64/kernel/entry-common.c:724
       el0t_64_sync_handler+0x84/0x12c arch/arm64/kernel/entry-common.c:743
       el0t_64_sync+0x198/0x19c arch/arm64/kernel/entry.S:596

other info that might help us debug this:

Chain exists of:
  &ocfs2_sysfile_lock_key[LOCAL_ALLOC_SYSTEM_INODE] --> &oi->ip_xattr_sem --> &oi->ip_alloc_sem

 Possible unsafe locking scenario:

       CPU0                    CPU1
       ----                    ----
  lock(&oi->ip_alloc_sem);
                               lock(&oi->ip_xattr_sem);
                               lock(&oi->ip_alloc_sem);
  lock(&ocfs2_sysfile_lock_key[LOCAL_ALLOC_SYSTEM_INODE]);

 *** DEADLOCK ***

3 locks held by syz.4.256/8124:
 #0: ffff000110068420 (sb_writers#24){.+.+}-{0:0}, at: file_start_write include/linux/fs.h:2681 [inline]
 #0: ffff000110068420 (sb_writers#24){.+.+}-{0:0}, at: vfs_fallocate+0x4d0/0x668 fs/open.c:338
 #1: ffff0000de959800 (&sb->s_type->i_mutex_key#35){+.+.}-{4:4}, at: inode_lock include/linux/fs.h:1027 [inline]
 #1: ffff0000de959800 (&sb->s_type->i_mutex_key#35){+.+.}-{4:4}, at: __ocfs2_change_file_space+0x15c/0xbc4 fs/ocfs2/file.c:1955
 #2: ffff0000de9594a0 (&oi->ip_alloc_sem){++++}-{4:4}, at: __ocfs2_change_file_space+0x618/0xbc4 fs/ocfs2/file.c:2021

stack backtrace:
CPU: 1 UID: 0 PID: 8124 Comm: syz.4.256 Tainted: G             L      syzkaller #0 PREEMPT 
Tainted: [L]=SOFTLOCKUP
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/03/2025
Call trace:
 show_stack+0x2c/0x3c arch/arm64/kernel/stacktrace.c:499 (C)
 __dump_stack+0x30/0x40 lib/dump_stack.c:94
 dump_stack_lvl+0xd8/0x12c lib/dump_stack.c:120
 dump_stack+0x1c/0x28 lib/dump_stack.c:129
 print_circular_bug+0x324/0x32c kernel/locking/lockdep.c:2043
 check_noncircular+0x154/0x174 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+0x1774/0x30a4 kernel/locking/lockdep.c:5237
 lock_acquire+0x140/0x2e0 kernel/locking/lockdep.c:5868
 down_write+0x50/0xc0 kernel/locking/rwsem.c:1590
 inode_lock include/linux/fs.h:1027 [inline]
 ocfs2_reserve_local_alloc_bits+0x104/0x26a8 fs/ocfs2/localalloc.c:636
 ocfs2_reserve_clusters_with_limit+0x198/0x9e0 fs/ocfs2/suballoc.c:1169
 ocfs2_reserve_clusters fs/ocfs2/suballoc.c:1230 [inline]
 ocfs2_lock_allocators+0x27c/0x518 fs/ocfs2/suballoc.c:2783
 ocfs2_extend_allocation+0x328/0x14cc fs/ocfs2/file.c:589
 ocfs2_allocate_unwritten_extents+0x26c/0x698 fs/ocfs2/file.c:1502
 __ocfs2_change_file_space+0x744/0xbc4 fs/ocfs2/file.c:2029
 ocfs2_fallocate+0x1f0/0x224 fs/ocfs2/file.c:2144
 vfs_fallocate+0x52c/0x668 fs/open.c:339
 ksys_fallocate fs/open.c:363 [inline]
 __do_sys_fallocate fs/open.c:368 [inline]
 __se_sys_fallocate fs/open.c:366 [inline]
 __arm64_sys_fallocate+0xbc/0x10c fs/open.c:366
 __invoke_syscall arch/arm64/kernel/syscall.c:35 [inline]
 invoke_syscall+0x98/0x254 arch/arm64/kernel/syscall.c:49
 el0_svc_common+0xe8/0x23c arch/arm64/kernel/syscall.c:132
 do_el0_svc+0x48/0x58 arch/arm64/kernel/syscall.c:151
 el0_svc+0x5c/0x26c arch/arm64/kernel/entry-common.c:724
 el0t_64_sync_handler+0x84/0x12c arch/arm64/kernel/entry-common.c:743
 el0t_64_sync+0x198/0x19c arch/arm64/kernel/entry.S:596