======================================================
WARNING: possible circular locking dependency detected
syzkaller #0 Not tainted
------------------------------------------------------
syz.5.625/6941 is trying to acquire lock:
ffff0000f5edd108 (&sb->s_type->i_mutex_key#29/2){+.+.}-{3:3}, at: inode_lock_nested include/linux/fs.h:793 [inline]
ffff0000f5edd108 (&sb->s_type->i_mutex_key#29/2){+.+.}-{3:3}, at: __ocfs2_reflink+0x9c0/0x136c fs/ocfs2/refcounttree.c:4178

but task is already holding lock:
ffff0000f5eddbe0 (&ocfs2_file_ip_alloc_sem_key){++++}-{3:3}, at: ocfs2_reflink+0x484/0x84c fs/ocfs2/refcounttree.c:4276

which lock already depends on the new lock.


the existing dependency chain (in reverse order) is:

-> #2 (&ocfs2_file_ip_alloc_sem_key){++++}-{3:3}:
       down_read+0x64/0x300 kernel/locking/rwsem.c:1520
       ocfs2_inode_lock_for_extent_tree+0xec/0x268 fs/ocfs2/file.c:2210
       ocfs2_prepare_inode_for_write fs/ocfs2/file.c:2266 [inline]
       ocfs2_file_write_iter+0x5bc/0x1cd0 fs/ocfs2/file.c:2451
       call_write_iter include/linux/fs.h:2265 [inline]
       new_sync_write fs/read_write.c:491 [inline]
       vfs_write+0x3c8/0x7c8 fs/read_write.c:584
       ksys_write+0x12c/0x228 fs/read_write.c:637
       __do_sys_write fs/read_write.c:649 [inline]
       __se_sys_write fs/read_write.c:646 [inline]
       __arm64_sys_write+0x7c/0x90 fs/read_write.c:646
       __invoke_syscall arch/arm64/kernel/syscall.c:38 [inline]
       invoke_syscall+0x98/0x290 arch/arm64/kernel/syscall.c:52
       el0_svc_common+0x13c/0x258 arch/arm64/kernel/syscall.c:140
       do_el0_svc+0x5c/0x134 arch/arm64/kernel/syscall.c:204
       el0_svc+0x58/0x128 arch/arm64/kernel/entry-common.c:637
       el0t_64_sync_handler+0x84/0xf0 arch/arm64/kernel/entry-common.c:655
       el0t_64_sync+0x18c/0x190 arch/arm64/kernel/entry.S:585

-> #1 (&sb->s_type->i_mutex_key#29){+.+.}-{3:3}:
       down_write+0x5c/0x88 kernel/locking/rwsem.c:1573
       inode_lock include/linux/fs.h:758 [inline]
       vfs_rename+0x6a8/0xe3c fs/namei.c:4847
       do_renameat2+0x760/0xaa4 fs/namei.c:5035
       __do_sys_renameat2 fs/namei.c:5068 [inline]
       __se_sys_renameat2 fs/namei.c:5065 [inline]
       __arm64_sys_renameat2+0xe8/0x104 fs/namei.c:5065
       __invoke_syscall arch/arm64/kernel/syscall.c:38 [inline]
       invoke_syscall+0x98/0x290 arch/arm64/kernel/syscall.c:52
       el0_svc_common+0x13c/0x258 arch/arm64/kernel/syscall.c:140
       do_el0_svc+0x5c/0x134 arch/arm64/kernel/syscall.c:204
       el0_svc+0x58/0x128 arch/arm64/kernel/entry-common.c:637
       el0t_64_sync_handler+0x84/0xf0 arch/arm64/kernel/entry-common.c:655
       el0t_64_sync+0x18c/0x190 arch/arm64/kernel/entry.S:585

-> #0 (&sb->s_type->i_mutex_key#29/2){+.+.}-{3:3}:
       check_prev_add kernel/locking/lockdep.c:3095 [inline]
       check_prevs_add kernel/locking/lockdep.c:3214 [inline]
       validate_chain kernel/locking/lockdep.c:3830 [inline]
       __lock_acquire+0x2808/0x6634 kernel/locking/lockdep.c:5063
       lock_acquire+0x20c/0x638 kernel/locking/lockdep.c:5676
       down_write_nested+0x64/0x94 kernel/locking/rwsem.c:1689
       inode_lock_nested include/linux/fs.h:793 [inline]
       __ocfs2_reflink+0x9c0/0x136c fs/ocfs2/refcounttree.c:4178
       ocfs2_reflink+0x498/0x84c fs/ocfs2/refcounttree.c:4277
       ocfs2_vfs_reflink+0x300/0x400 fs/ocfs2/refcounttree.c:4403
       ocfs2_reflink_ioctl+0x35c/0x3f0 fs/ocfs2/refcounttree.c:4443
       ocfs2_ioctl+0x884/0xb2c fs/ocfs2/ioctl.c:913
       vfs_ioctl fs/ioctl.c:51 [inline]
       __do_sys_ioctl fs/ioctl.c:870 [inline]
       __se_sys_ioctl fs/ioctl.c:856 [inline]
       __arm64_sys_ioctl+0x14c/0x1c8 fs/ioctl.c:856
       __invoke_syscall arch/arm64/kernel/syscall.c:38 [inline]
       invoke_syscall+0x98/0x290 arch/arm64/kernel/syscall.c:52
       el0_svc_common+0x13c/0x258 arch/arm64/kernel/syscall.c:140
       do_el0_svc+0x5c/0x134 arch/arm64/kernel/syscall.c:204
       el0_svc+0x58/0x128 arch/arm64/kernel/entry-common.c:637
       el0t_64_sync_handler+0x84/0xf0 arch/arm64/kernel/entry-common.c:655
       el0t_64_sync+0x18c/0x190 arch/arm64/kernel/entry.S:585

other info that might help us debug this:

Chain exists of:
  &sb->s_type->i_mutex_key#29/2 --> &sb->s_type->i_mutex_key#29 --> &ocfs2_file_ip_alloc_sem_key

 Possible unsafe locking scenario:

       CPU0                    CPU1
       ----                    ----
  lock(&ocfs2_file_ip_alloc_sem_key);
                               lock(&sb->s_type->i_mutex_key#29);
                               lock(&ocfs2_file_ip_alloc_sem_key);
  lock(&sb->s_type->i_mutex_key#29/2);

 *** DEADLOCK ***

5 locks held by syz.5.625/6941:
 #0: ffff0000d9dd2460 (sb_writers#26){.+.+}-{0:0}, at: mnt_want_write+0x44/0x9c fs/namespace.c:402
 #1: ffff0000e16db488 (&type->i_mutex_dir_key#15/1){+.+.}-{3:3}, at: inode_lock_nested include/linux/fs.h:793 [inline]
 #1: ffff0000e16db488 (&type->i_mutex_dir_key#15/1){+.+.}-{3:3}, at: filename_create+0x1b0/0x3a8 fs/namei.c:3884
 #2: ffff0000f5eddf48 (&sb->s_type->i_mutex_key#29){+.+.}-{3:3}, at: inode_lock include/linux/fs.h:758 [inline]
 #2: ffff0000f5eddf48 (&sb->s_type->i_mutex_key#29){+.+.}-{3:3}, at: ocfs2_vfs_reflink+0x2bc/0x400 fs/ocfs2/refcounttree.c:4400
 #3: ffff0000f5eddc78 (&oi->ip_xattr_sem){++++}-{3:3}, at: ocfs2_reflink+0x47c/0x84c fs/ocfs2/refcounttree.c:4275
 #4: ffff0000f5eddbe0 (&ocfs2_file_ip_alloc_sem_key){++++}-{3:3}, at: ocfs2_reflink+0x484/0x84c fs/ocfs2/refcounttree.c:4276

stack backtrace:
CPU: 1 PID: 6941 Comm: syz.5.625 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/02/2026
Call trace:
 dump_backtrace+0x1c4/0x1f0 arch/arm64/kernel/stacktrace.c:158
 show_stack+0x2c/0x3c arch/arm64/kernel/stacktrace.c:165
 __dump_stack+0x30/0x40 lib/dump_stack.c:88
 dump_stack_lvl+0xf4/0x15c lib/dump_stack.c:106
 dump_stack+0x1c/0x5c lib/dump_stack.c:113
 print_circular_bug+0x148/0x1b0 kernel/locking/lockdep.c:2048
 check_noncircular+0x264/0x2f8 kernel/locking/lockdep.c:2170
 check_prev_add kernel/locking/lockdep.c:3095 [inline]
 check_prevs_add kernel/locking/lockdep.c:3214 [inline]
 validate_chain kernel/locking/lockdep.c:3830 [inline]
 __lock_acquire+0x2808/0x6634 kernel/locking/lockdep.c:5063
 lock_acquire+0x20c/0x638 kernel/locking/lockdep.c:5676
 down_write_nested+0x64/0x94 kernel/locking/rwsem.c:1689
 inode_lock_nested include/linux/fs.h:793 [inline]
 __ocfs2_reflink+0x9c0/0x136c fs/ocfs2/refcounttree.c:4178
 ocfs2_reflink+0x498/0x84c fs/ocfs2/refcounttree.c:4277
 ocfs2_vfs_reflink+0x300/0x400 fs/ocfs2/refcounttree.c:4403
 ocfs2_reflink_ioctl+0x35c/0x3f0 fs/ocfs2/refcounttree.c:4443
 ocfs2_ioctl+0x884/0xb2c fs/ocfs2/ioctl.c:913
 vfs_ioctl fs/ioctl.c:51 [inline]
 __do_sys_ioctl fs/ioctl.c:870 [inline]
 __se_sys_ioctl fs/ioctl.c:856 [inline]
 __arm64_sys_ioctl+0x14c/0x1c8 fs/ioctl.c:856
 __invoke_syscall arch/arm64/kernel/syscall.c:38 [inline]
 invoke_syscall+0x98/0x290 arch/arm64/kernel/syscall.c:52
 el0_svc_common+0x13c/0x258 arch/arm64/kernel/syscall.c:140
 do_el0_svc+0x5c/0x134 arch/arm64/kernel/syscall.c:204
 el0_svc+0x58/0x128 arch/arm64/kernel/entry-common.c:637
 el0t_64_sync_handler+0x84/0xf0 arch/arm64/kernel/entry-common.c:655
 el0t_64_sync+0x18c/0x190 arch/arm64/kernel/entry.S:585
(syz.5.625,6941,1):ocfs2_check_dir_entry:325 ERROR: bad entry in directory #72: rec_len is smaller than minimal - offset=0, inode=1099511627848, rec_len=12, name_len=0
(syz.5.625,6941,1):__ocfs2_delete_entry:1162 ERROR: status = -5
(syz.5.625,6941,1):ocfs2_orphan_del:2386 ERROR: status = -5
(syz.5.625,6941,1):ocfs2_orphan_del:2401 ERROR: status = -5
(syz.5.625,6941,1):ocfs2_mv_orphaned_inode_to_new:2860 ERROR: status = -5
(syz.5.625,6941,1):ocfs2_mv_orphaned_inode_to_new:2906 ERROR: status = -5
(syz.5.625,6941,1):ocfs2_reflink:4310 ERROR: status = -5
(syz.5.625,6941,1):ocfs2_check_dir_entry:325 ERROR: bad entry in directory #72: rec_len is smaller than minimal - offset=0, inode=1099511627848, rec_len=12, name_len=0
(syz.5.625,6941,1):__ocfs2_delete_entry:1162 ERROR: status = -5
(syz.5.625,6941,1):ocfs2_orphan_del:2386 ERROR: status = -5
(syz.5.625,6941,1):ocfs2_orphan_del:2401 ERROR: status = -5
(syz.5.625,6941,1):ocfs2_remove_inode:709 ERROR: status = -5
(syz.5.625,6941,1):ocfs2_wipe_inode:854 ERROR: status = -5
(syz.5.625,6941,1):ocfs2_delete_inode:1115 ERROR: status = -5