====================================================== WARNING: possible circular locking dependency detected 6.7.0-rc5-syzkaller-00125-gc7402612e2e6 #0 Not tainted ------------------------------------------------------ kswapd0/108 is trying to acquire lock: ffff888015688100 (&rl->lock){++++}-{3:3}, at: __ntfs_clear_inode+0x24/0x260 fs/ntfs/inode.c:2189 but task is already holding lock: ffffffff8d11ca60 (fs_reclaim){+.+.}-{0:0}, at: balance_pgdat+0x160/0x1a90 mm/vmscan.c:6716 which lock already depends on the new lock. the existing dependency chain (in reverse order) is: -> #2 (fs_reclaim){+.+.}-{0:0}: __fs_reclaim_acquire mm/page_alloc.c:3693 [inline] fs_reclaim_acquire+0x100/0x150 mm/page_alloc.c:3707 might_alloc include/linux/sched/mm.h:303 [inline] prepare_alloc_pages.constprop.0+0x155/0x550 mm/page_alloc.c:4339 __alloc_pages+0x193/0x2420 mm/page_alloc.c:4557 alloc_pages_mpol+0x258/0x5f0 mm/mempolicy.c:2133 folio_alloc+0x1e/0xe0 mm/mempolicy.c:2211 filemap_alloc_folio+0x3bb/0x490 mm/filemap.c:974 do_read_cache_folio+0x1b8/0x540 mm/filemap.c:3655 do_read_cache_page mm/filemap.c:3757 [inline] read_cache_page+0x5b/0x160 mm/filemap.c:3766 read_mapping_page include/linux/pagemap.h:871 [inline] ntfs_map_page fs/ntfs/aops.h:75 [inline] map_mft_record_page fs/ntfs/mft.c:73 [inline] map_mft_record+0x1dd/0x730 fs/ntfs/mft.c:156 ntfs_read_locked_inode+0x19b/0x5860 fs/ntfs/inode.c:550 ntfs_iget+0x130/0x180 fs/ntfs/inode.c:177 ntfs_lookup+0x312/0xc30 fs/ntfs/namei.c:117 __lookup_slow+0x24d/0x450 fs/namei.c:1694 lookup_slow fs/namei.c:1711 [inline] walk_component+0x349/0x5a0 fs/namei.c:2002 link_path_walk.part.0.constprop.0+0x71f/0xce0 fs/namei.c:2329 link_path_walk fs/namei.c:2254 [inline] path_openat+0x23f/0x2c50 fs/namei.c:3775 do_filp_open+0x1de/0x430 fs/namei.c:3809 do_sys_openat2+0x176/0x1e0 fs/open.c:1440 do_sys_open fs/open.c:1455 [inline] __do_compat_sys_openat fs/open.c:1515 [inline] __se_compat_sys_openat fs/open.c:1513 [inline] __ia32_compat_sys_openat+0x16e/0x200 fs/open.c:1513 do_syscall_32_irqs_on arch/x86/entry/common.c:165 [inline] __do_fast_syscall_32+0x62/0xe0 arch/x86/entry/common.c:321 do_fast_syscall_32+0x33/0x70 arch/x86/entry/common.c:346 entry_SYSENTER_compat_after_hwframe+0x70/0x7a -> #1 (&ni->mrec_lock){+.+.}-{3:3}: __mutex_lock_common kernel/locking/mutex.c:603 [inline] __mutex_lock+0x175/0x9d0 kernel/locking/mutex.c:747 map_mft_record+0x4a/0x730 fs/ntfs/mft.c:154 ntfs_attr_extend_allocation+0x268/0x3840 fs/ntfs/attrib.c:2002 ntfs_prepare_file_for_write fs/ntfs/file.c:391 [inline] ntfs_file_write_iter+0xaa0/0x2070 fs/ntfs/file.c:1907 call_write_iter include/linux/fs.h:2020 [inline] do_iter_readv_writev+0x21e/0x3c0 fs/read_write.c:735 do_iter_write+0x17f/0x7f0 fs/read_write.c:860 vfs_writev+0x221/0x700 fs/read_write.c:933 do_pwritev+0x1af/0x260 fs/read_write.c:1030 __do_compat_sys_pwritev2 fs/read_write.c:1176 [inline] __se_compat_sys_pwritev2 fs/read_write.c:1168 [inline] __ia32_compat_sys_pwritev2+0x121/0x1b0 fs/read_write.c:1168 do_syscall_32_irqs_on arch/x86/entry/common.c:165 [inline] __do_fast_syscall_32+0x62/0xe0 arch/x86/entry/common.c:321 do_fast_syscall_32+0x33/0x70 arch/x86/entry/common.c:346 entry_SYSENTER_compat_after_hwframe+0x70/0x7a -> #0 (&rl->lock){++++}-{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+0x2433/0x3b20 kernel/locking/lockdep.c:5137 lock_acquire kernel/locking/lockdep.c:5754 [inline] lock_acquire+0x1ae/0x520 kernel/locking/lockdep.c:5719 down_write+0x3a/0x50 kernel/locking/rwsem.c:1579 __ntfs_clear_inode+0x24/0x260 fs/ntfs/inode.c:2189 ntfs_evict_big_inode+0x29e/0x530 fs/ntfs/inode.c:2278 evict+0x2ed/0x6b0 fs/inode.c:666 dispose_list+0x117/0x1e0 fs/inode.c:699 prune_icache_sb+0xeb/0x150 fs/inode.c:884 super_cache_scan+0x372/0x540 fs/super.c:230 do_shrink_slab+0x428/0x1120 mm/shrinker.c:435 shrink_slab_memcg mm/shrinker.c:548 [inline] shrink_slab+0xa83/0x1310 mm/shrinker.c:626 shrink_one+0x4f7/0x700 mm/vmscan.c:4724 shrink_many mm/vmscan.c:4776 [inline] lru_gen_shrink_node mm/vmscan.c:4893 [inline] shrink_node+0x20cd/0x3790 mm/vmscan.c:5833 kswapd_shrink_node mm/vmscan.c:6638 [inline] balance_pgdat+0x9d2/0x1a90 mm/vmscan.c:6828 kswapd+0x5be/0xbf0 mm/vmscan.c:7088 kthread+0x2c6/0x3a0 kernel/kthread.c:388 ret_from_fork+0x45/0x80 arch/x86/kernel/process.c:147 ret_from_fork_asm+0x11/0x20 arch/x86/entry/entry_64.S:242 other info that might help us debug this: Chain exists of: &rl->lock --> &ni->mrec_lock --> fs_reclaim Possible unsafe locking scenario: CPU0 CPU1 ---- ---- lock(fs_reclaim); lock(&ni->mrec_lock); lock(fs_reclaim); lock(&rl->lock); *** DEADLOCK *** 2 locks held by kswapd0/108: #0: ffffffff8d11ca60 (fs_reclaim){+.+.}-{0:0}, at: balance_pgdat+0x160/0x1a90 mm/vmscan.c:6716 #1: ffff8880456360e0 (&type->s_umount_key#110){++++}-{3:3}, at: super_trylock_shared fs/super.c:610 [inline] #1: ffff8880456360e0 (&type->s_umount_key#110){++++}-{3:3}, at: super_cache_scan+0x96/0x540 fs/super.c:203 stack backtrace: CPU: 2 PID: 108 Comm: kswapd0 Not tainted 6.7.0-rc5-syzkaller-00125-gc7402612e2e6 #0 Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.2-debian-1.16.2-1 04/01/2014 Call Trace: __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0xd9/0x1b0 lib/dump_stack.c:106 check_noncircular+0x317/0x400 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+0x2433/0x3b20 kernel/locking/lockdep.c:5137 lock_acquire kernel/locking/lockdep.c:5754 [inline] lock_acquire+0x1ae/0x520 kernel/locking/lockdep.c:5719 down_write+0x3a/0x50 kernel/locking/rwsem.c:1579 __ntfs_clear_inode+0x24/0x260 fs/ntfs/inode.c:2189 ntfs_evict_big_inode+0x29e/0x530 fs/ntfs/inode.c:2278 evict+0x2ed/0x6b0 fs/inode.c:666 dispose_list+0x117/0x1e0 fs/inode.c:699 prune_icache_sb+0xeb/0x150 fs/inode.c:884 super_cache_scan+0x372/0x540 fs/super.c:230 do_shrink_slab+0x428/0x1120 mm/shrinker.c:435 shrink_slab_memcg mm/shrinker.c:548 [inline] shrink_slab+0xa83/0x1310 mm/shrinker.c:626 shrink_one+0x4f7/0x700 mm/vmscan.c:4724 shrink_many mm/vmscan.c:4776 [inline] lru_gen_shrink_node mm/vmscan.c:4893 [inline] shrink_node+0x20cd/0x3790 mm/vmscan.c:5833 kswapd_shrink_node mm/vmscan.c:6638 [inline] balance_pgdat+0x9d2/0x1a90 mm/vmscan.c:6828 kswapd+0x5be/0xbf0 mm/vmscan.c:7088 kthread+0x2c6/0x3a0 kernel/kthread.c:388 ret_from_fork+0x45/0x80 arch/x86/kernel/process.c:147 ret_from_fork_asm+0x11/0x20 arch/x86/entry/entry_64.S:242