======================================================
WARNING: possible circular locking dependency detected
syzkaller #0 Not tainted
------------------------------------------------------
syz.2.1246/10392 is trying to acquire lock:
ffff88805f215f58 (&ocfs2_sysfile_lock_key[args->fi_sysfile_type]#6){+.+.}-{3:3}, at: inode_lock include/linux/fs.h:804 [inline]
ffff88805f215f58 (&ocfs2_sysfile_lock_key[args->fi_sysfile_type]#6){+.+.}-{3:3}, at: ocfs2_move_extent fs/ocfs2/move_extents.c:646 [inline]
ffff88805f215f58 (&ocfs2_sysfile_lock_key[args->fi_sysfile_type]#6){+.+.}-{3:3}, at: __ocfs2_move_extents_range+0x1a35/0x3450 fs/ocfs2/move_extents.c:866

but task is already holding lock:
ffff88805f213498 (&ocfs2_sysfile_lock_key[args->fi_sysfile_type]#5){+.+.}-{3:3}, at: inode_lock include/linux/fs.h:804 [inline]
ffff88805f213498 (&ocfs2_sysfile_lock_key[args->fi_sysfile_type]#5){+.+.}-{3:3}, at: ocfs2_move_extent fs/ocfs2/move_extents.c:638 [inline]
ffff88805f213498 (&ocfs2_sysfile_lock_key[args->fi_sysfile_type]#5){+.+.}-{3:3}, at: __ocfs2_move_extents_range+0x1323/0x3450 fs/ocfs2/move_extents.c:866

which lock already depends on the new lock.


the existing dependency chain (in reverse order) is:

-> #2 (&ocfs2_sysfile_lock_key[args->fi_sysfile_type]#5){+.+.}-{3:3}:
       down_write+0x97/0x200 kernel/locking/rwsem.c:1573
       inode_lock include/linux/fs.h:804 [inline]
       ocfs2_reserve_suballoc_bits+0x171/0x44a0 fs/ocfs2/suballoc.c:804
       ocfs2_reserve_cluster_bitmap_bits+0xc5/0x1d0 fs/ocfs2/suballoc.c:1150
       ocfs2_local_alloc_reserve_for_window fs/ocfs2/localalloc.c:1112 [inline]
       ocfs2_local_alloc_slide_window fs/ocfs2/localalloc.c:1248 [inline]
       ocfs2_reserve_local_alloc_bits+0x8cb/0x2620 fs/ocfs2/localalloc.c:668
       ocfs2_reserve_clusters_with_limit+0x1ba/0xc20 fs/ocfs2/suballoc.c:1184
       ocfs2_reserve_clusters fs/ocfs2/suballoc.c:1245 [inline]
       ocfs2_lock_allocators+0x2d2/0x5f0 fs/ocfs2/suballoc.c:2701
       ocfs2_extend_allocation+0x402/0x1830 fs/ocfs2/file.c:589
       ocfs2_allocate_unwritten_extents+0x315/0x840 fs/ocfs2/file.c:1495
       __ocfs2_change_file_space+0x89d/0xf80 fs/ocfs2/file.c:2022
       ocfs2_fallocate+0x1f5/0x240 fs/ocfs2/file.c:2137
       vfs_fallocate+0x585/0x6f0 fs/open.c:324
       ksys_fallocate fs/open.c:347 [inline]
       __do_sys_fallocate fs/open.c:355 [inline]
       __se_sys_fallocate fs/open.c:353 [inline]
       __x64_sys_fallocate+0xc1/0x110 fs/open.c:353
       do_syscall_x64 arch/x86/entry/common.c:46 [inline]
       do_syscall_64+0x55/0xb0 arch/x86/entry/common.c:76
       entry_SYSCALL_64_after_hwframe+0x68/0xd2

-> #1 (&ocfs2_sysfile_lock_key[args->fi_sysfile_type]#4){+.+.}-{3:3}:
       down_write+0x97/0x200 kernel/locking/rwsem.c:1573
       inode_lock include/linux/fs.h:804 [inline]
       ocfs2_reserve_local_alloc_bits+0x120/0x2620 fs/ocfs2/localalloc.c:635
       ocfs2_reserve_clusters_with_limit+0x1ba/0xc20 fs/ocfs2/suballoc.c:1184
       ocfs2_defrag_extent fs/ocfs2/move_extents.c:272 [inline]
       __ocfs2_move_extents_range+0x15da/0x3450 fs/ocfs2/move_extents.c:863
       ocfs2_move_extents+0x3f9/0xa10 fs/ocfs2/move_extents.c:938
       ocfs2_ioctl_move_extents+0x4db/0x6e0 fs/ocfs2/move_extents.c:1064
       ocfs2_ioctl+0x199/0x7e0 fs/ocfs2/ioctl.c:961
       vfs_ioctl fs/ioctl.c:51 [inline]
       __do_sys_ioctl fs/ioctl.c:871 [inline]
       __se_sys_ioctl+0xfd/0x170 fs/ioctl.c:857
       do_syscall_x64 arch/x86/entry/common.c:46 [inline]
       do_syscall_64+0x55/0xb0 arch/x86/entry/common.c:76
       entry_SYSCALL_64_after_hwframe+0x68/0xd2

-> #0 (&ocfs2_sysfile_lock_key[args->fi_sysfile_type]#6){+.+.}-{3:3}:
       check_prev_add kernel/locking/lockdep.c:3134 [inline]
       check_prevs_add kernel/locking/lockdep.c:3253 [inline]
       validate_chain kernel/locking/lockdep.c:3869 [inline]
       __lock_acquire+0x37ef/0x7d80 kernel/locking/lockdep.c:5137
       lock_acquire+0x19e/0x420 kernel/locking/lockdep.c:5754
       down_write+0x97/0x200 kernel/locking/rwsem.c:1573
       inode_lock include/linux/fs.h:804 [inline]
       ocfs2_move_extent fs/ocfs2/move_extents.c:646 [inline]
       __ocfs2_move_extents_range+0x1a35/0x3450 fs/ocfs2/move_extents.c:866
       ocfs2_move_extents+0x3f9/0xa10 fs/ocfs2/move_extents.c:938
       ocfs2_ioctl_move_extents+0x4db/0x6e0 fs/ocfs2/move_extents.c:1064
       ocfs2_ioctl+0x199/0x7e0 fs/ocfs2/ioctl.c:961
       vfs_ioctl fs/ioctl.c:51 [inline]
       __do_sys_ioctl fs/ioctl.c:871 [inline]
       __se_sys_ioctl+0xfd/0x170 fs/ioctl.c:857
       do_syscall_x64 arch/x86/entry/common.c:46 [inline]
       do_syscall_64+0x55/0xb0 arch/x86/entry/common.c:76
       entry_SYSCALL_64_after_hwframe+0x68/0xd2

other info that might help us debug this:

Chain exists of:
  &ocfs2_sysfile_lock_key[args->fi_sysfile_type]#6 --> &ocfs2_sysfile_lock_key[args->fi_sysfile_type]#4 --> &ocfs2_sysfile_lock_key[args->fi_sysfile_type]#5

 Possible unsafe locking scenario:

       CPU0                    CPU1
       ----                    ----
  lock(&ocfs2_sysfile_lock_key[args->fi_sysfile_type]#5);
                               lock(&ocfs2_sysfile_lock_key[args->fi_sysfile_type]#4);
                               lock(&ocfs2_sysfile_lock_key[args->fi_sysfile_type]#5);
  lock(&ocfs2_sysfile_lock_key[args->fi_sysfile_type]#6);

 *** DEADLOCK ***

6 locks held by syz.2.1246/10392:
 #0: ffff8880182b8418 (sb_writers#13){.+.+}-{0:0}, at: mnt_want_write_file+0x63/0x200 fs/namespace.c:456
 #1: ffff88805f156d98 (&sb->s_type->i_mutex_key#20){+.+.}-{3:3}, at: inode_lock include/linux/fs.h:804 [inline]
 #1: ffff88805f156d98 (&sb->s_type->i_mutex_key#20){+.+.}-{3:3}, at: ocfs2_move_extents+0x1a0/0xa10 fs/ocfs2/move_extents.c:916
 #2: ffff88805f156a20 (&ocfs2_file_ip_alloc_sem_key){++++}-{3:3}, at: ocfs2_move_extents+0x3ec/0xa10 fs/ocfs2/move_extents.c:936
 #3: ffff88807f22a898 (&new->rf_sem){+.+.}-{3:3}, at: __ocfs2_lock_refcount_tree fs/ocfs2/refcounttree.c:428 [inline]
 #3: ffff88807f22a898 (&new->rf_sem){+.+.}-{3:3}, at: ocfs2_lock_refcount_tree+0x1ae/0x9d0 fs/ocfs2/refcounttree.c:463
 #4: ffff88805f2109d8 (&ocfs2_sysfile_lock_key[args->fi_sysfile_type]#3){+.+.}-{3:3}, at: inode_lock include/linux/fs.h:804 [inline]
 #4: ffff88805f2109d8 (&ocfs2_sysfile_lock_key[args->fi_sysfile_type]#3){+.+.}-{3:3}, at: ocfs2_reserve_suballoc_bits+0x171/0x44a0 fs/ocfs2/suballoc.c:804
 #5: ffff88805f213498 (&ocfs2_sysfile_lock_key[args->fi_sysfile_type]#5){+.+.}-{3:3}, at: inode_lock include/linux/fs.h:804 [inline]
 #5: ffff88805f213498 (&ocfs2_sysfile_lock_key[args->fi_sysfile_type]#5){+.+.}-{3:3}, at: ocfs2_move_extent fs/ocfs2/move_extents.c:638 [inline]
 #5: ffff88805f213498 (&ocfs2_sysfile_lock_key[args->fi_sysfile_type]#5){+.+.}-{3:3}, at: __ocfs2_move_extents_range+0x1323/0x3450 fs/ocfs2/move_extents.c:866

stack backtrace:
CPU: 0 PID: 10392 Comm: syz.2.1246 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/25/2026
Call Trace:
 <TASK>
 dump_stack_lvl+0x18c/0x250 lib/dump_stack.c:106
 check_noncircular+0x2fc/0x400 kernel/locking/lockdep.c:2187
 check_prev_add kernel/locking/lockdep.c:3134 [inline]
 check_prevs_add kernel/locking/lockdep.c:3253 [inline]
 validate_chain kernel/locking/lockdep.c:3869 [inline]
 __lock_acquire+0x37ef/0x7d80 kernel/locking/lockdep.c:5137
 lock_acquire+0x19e/0x420 kernel/locking/lockdep.c:5754
 down_write+0x97/0x200 kernel/locking/rwsem.c:1573
 inode_lock include/linux/fs.h:804 [inline]
 ocfs2_move_extent fs/ocfs2/move_extents.c:646 [inline]
 __ocfs2_move_extents_range+0x1a35/0x3450 fs/ocfs2/move_extents.c:866
 ocfs2_move_extents+0x3f9/0xa10 fs/ocfs2/move_extents.c:938
 ocfs2_ioctl_move_extents+0x4db/0x6e0 fs/ocfs2/move_extents.c:1064
 ocfs2_ioctl+0x199/0x7e0 fs/ocfs2/ioctl.c:961
 vfs_ioctl fs/ioctl.c:51 [inline]
 __do_sys_ioctl fs/ioctl.c:871 [inline]
 __se_sys_ioctl+0xfd/0x170 fs/ioctl.c:857
 do_syscall_x64 arch/x86/entry/common.c:46 [inline]
 do_syscall_64+0x55/0xb0 arch/x86/entry/common.c:76
 entry_SYSCALL_64_after_hwframe+0x68/0xd2
RIP: 0033:0x7f530c79de59
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:00007f530d6ac028 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00007f530ca25fa0 RCX: 00007f530c79de59
RDX: 00002000000000c0 RSI: 0000000040406f06 RDI: 0000000000000005
RBP: 00007f530c833e6f R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f530ca26038 R14: 00007f530ca25fa0 R15: 00007ffe6c476ee8
 </TASK>