loop4: detected capacity change from 0 to 32768 ocfs2: Mounting device (7,4) on (node local, slot 0) with ordered data mode. ====================================================== WARNING: possible circular locking dependency detected 5.15.178-syzkaller #0 Not tainted ------------------------------------------------------ syz.4.30/4487 is trying to acquire lock: ffff88805587df48 (&ocfs2_sysfile_lock_key[args->fi_sysfile_type]#8){+.+.}-{3:3}, at: inode_lock include/linux/fs.h:789 [inline] ffff88805587df48 (&ocfs2_sysfile_lock_key[args->fi_sysfile_type]#8){+.+.}-{3:3}, at: ocfs2_move_extent fs/ocfs2/move_extents.c:640 [inline] ffff88805587df48 (&ocfs2_sysfile_lock_key[args->fi_sysfile_type]#8){+.+.}-{3:3}, at: __ocfs2_move_extents_range+0x1ecb/0x43f0 fs/ocfs2/move_extents.c:860 but task is already holding lock: ffff8880558789c8 (&ocfs2_sysfile_lock_key[args->fi_sysfile_type]#7){+.+.}-{3:3}, at: inode_lock include/linux/fs.h:789 [inline] ffff8880558789c8 (&ocfs2_sysfile_lock_key[args->fi_sysfile_type]#7){+.+.}-{3:3}, at: ocfs2_move_extent fs/ocfs2/move_extents.c:632 [inline] ffff8880558789c8 (&ocfs2_sysfile_lock_key[args->fi_sysfile_type]#7){+.+.}-{3:3}, at: __ocfs2_move_extents_range+0x1674/0x43f0 fs/ocfs2/move_extents.c:860 which lock already depends on the new lock. the existing dependency chain (in reverse order) is: -> #1 (&ocfs2_sysfile_lock_key[args->fi_sysfile_type]#7){+.+.}-{3:3}: lock_acquire+0x1db/0x4f0 kernel/locking/lockdep.c:5623 down_write+0x38/0x60 kernel/locking/rwsem.c:1551 inode_lock include/linux/fs.h:789 [inline] __ocfs2_flush_truncate_log+0x36e/0x11c0 fs/ocfs2/alloc.c:6037 ocfs2_flush_truncate_log fs/ocfs2/alloc.c:6067 [inline] ocfs2_try_to_free_truncate_log+0x1b3/0x410 fs/ocfs2/alloc.c:6126 ocfs2_reserve_clusters_with_limit+0x4e6/0xb50 fs/ocfs2/suballoc.c:1180 ocfs2_reserve_clusters fs/ocfs2/suballoc.c:1223 [inline] ocfs2_lock_allocators+0x306/0x620 fs/ocfs2/suballoc.c:2669 ocfs2_write_begin_nolock+0x28e5/0x4d20 fs/ocfs2/aops.c:1741 ocfs2_write_begin+0x1fd/0x390 fs/ocfs2/aops.c:1905 generic_perform_write+0x2bf/0x5b0 mm/filemap.c:3785 __generic_file_write_iter+0x243/0x4f0 mm/filemap.c:3912 ocfs2_file_write_iter+0x1980/0x2120 fs/ocfs2/file.c:2472 call_write_iter include/linux/fs.h:2174 [inline] new_sync_write fs/read_write.c:507 [inline] vfs_write+0xacd/0xe50 fs/read_write.c:594 ksys_write+0x1a2/0x2c0 fs/read_write.c:647 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x3b/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x66/0xd0 -> #0 (&ocfs2_sysfile_lock_key[args->fi_sysfile_type]#8){+.+.}-{3:3}: check_prev_add kernel/locking/lockdep.c:3053 [inline] check_prevs_add kernel/locking/lockdep.c:3172 [inline] validate_chain+0x1649/0x5930 kernel/locking/lockdep.c:3788 __lock_acquire+0x1295/0x1ff0 kernel/locking/lockdep.c:5012 lock_acquire+0x1db/0x4f0 kernel/locking/lockdep.c:5623 down_write+0x38/0x60 kernel/locking/rwsem.c:1551 inode_lock include/linux/fs.h:789 [inline] ocfs2_move_extent fs/ocfs2/move_extents.c:640 [inline] __ocfs2_move_extents_range+0x1ecb/0x43f0 fs/ocfs2/move_extents.c:860 ocfs2_move_extents+0x3ea/0xaa0 fs/ocfs2/move_extents.c:927 ocfs2_ioctl_move_extents+0x5d2/0x800 fs/ocfs2/move_extents.c:1053 ocfs2_ioctl+0x2eb/0x7d0 fs/ocfs2/ioctl.c:931 vfs_ioctl fs/ioctl.c:51 [inline] __do_sys_ioctl fs/ioctl.c:874 [inline] __se_sys_ioctl+0xf1/0x160 fs/ioctl.c:860 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x3b/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x66/0xd0 other info that might help us debug this: Possible unsafe locking scenario: CPU0 CPU1 ---- ---- lock(&ocfs2_sysfile_lock_key[args->fi_sysfile_type]#7); lock(&ocfs2_sysfile_lock_key[args->fi_sysfile_type]#8); lock(&ocfs2_sysfile_lock_key[args->fi_sysfile_type]#7); lock(&ocfs2_sysfile_lock_key[args->fi_sysfile_type]#8); *** DEADLOCK *** 5 locks held by syz.4.30/4487: #0: ffff88806069c460 (sb_writers#17){.+.+}-{0:0}, at: mnt_want_write_file+0x5a/0x1f0 fs/namespace.c:421 #1: ffff888061412648 (&sb->s_type->i_mutex_key#25){+.+.}-{3:3}, at: inode_lock include/linux/fs.h:789 [inline] #1: ffff888061412648 (&sb->s_type->i_mutex_key#25){+.+.}-{3:3}, at: ocfs2_move_extents+0x1c1/0xaa0 fs/ocfs2/move_extents.c:905 #2: ffff8880614122e0 (&oi->ip_alloc_sem){++++}-{3:3}, at: ocfs2_move_extents+0x3c7/0xaa0 fs/ocfs2/move_extents.c:925 #3: ffff88805587a648 (&ocfs2_sysfile_lock_key[args->fi_sysfile_type]#3){+.+.}-{3:3}, at: inode_lock include/linux/fs.h:789 [inline] #3: ffff88805587a648 (&ocfs2_sysfile_lock_key[args->fi_sysfile_type]#3){+.+.}-{3:3}, at: ocfs2_reserve_suballoc_bits+0x18e/0x4c70 fs/ocfs2/suballoc.c:782 #4: ffff8880558789c8 (&ocfs2_sysfile_lock_key[args->fi_sysfile_type]#7){+.+.}-{3:3}, at: inode_lock include/linux/fs.h:789 [inline] #4: ffff8880558789c8 (&ocfs2_sysfile_lock_key[args->fi_sysfile_type]#7){+.+.}-{3:3}, at: ocfs2_move_extent fs/ocfs2/move_extents.c:632 [inline] #4: ffff8880558789c8 (&ocfs2_sysfile_lock_key[args->fi_sysfile_type]#7){+.+.}-{3:3}, at: __ocfs2_move_extents_range+0x1674/0x43f0 fs/ocfs2/move_extents.c:860 stack backtrace: CPU: 1 PID: 4487 Comm: syz.4.30 Not tainted 5.15.178-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2025 Call Trace: __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0x1e3/0x2d0 lib/dump_stack.c:106 check_noncircular+0x2f8/0x3b0 kernel/locking/lockdep.c:2133 check_prev_add kernel/locking/lockdep.c:3053 [inline] check_prevs_add kernel/locking/lockdep.c:3172 [inline] validate_chain+0x1649/0x5930 kernel/locking/lockdep.c:3788 __lock_acquire+0x1295/0x1ff0 kernel/locking/lockdep.c:5012 lock_acquire+0x1db/0x4f0 kernel/locking/lockdep.c:5623 down_write+0x38/0x60 kernel/locking/rwsem.c:1551 inode_lock include/linux/fs.h:789 [inline] ocfs2_move_extent fs/ocfs2/move_extents.c:640 [inline] __ocfs2_move_extents_range+0x1ecb/0x43f0 fs/ocfs2/move_extents.c:860 ocfs2_move_extents+0x3ea/0xaa0 fs/ocfs2/move_extents.c:927 ocfs2_ioctl_move_extents+0x5d2/0x800 fs/ocfs2/move_extents.c:1053 ocfs2_ioctl+0x2eb/0x7d0 fs/ocfs2/ioctl.c:931 vfs_ioctl fs/ioctl.c:51 [inline] __do_sys_ioctl fs/ioctl.c:874 [inline] __se_sys_ioctl+0xf1/0x160 fs/ioctl.c:860 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x3b/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x66/0xd0 RIP: 0033:0x7f5e6e7fb169 Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 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 a8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007f5e6c664038 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 00007f5e6ea13fa0 RCX: 00007f5e6e7fb169 RDX: 00004000000000c0 RSI: 0000000040406f06 RDI: 0000000000000004 RBP: 00007f5e6e87c2a0 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 0000000000000000 R14: 00007f5e6ea13fa0 R15: 00007fff07157b88