====================================================== WARNING: possible circular locking dependency detected 6.7.0-syzkaller-11705-gb0d326da462e #0 Not tainted ------------------------------------------------------ kswapd0/108 is trying to acquire lock: ffff888026c28940 (&rl->lock){+.+.}-{3:3}, at: __ntfs_clear_inode+0x24/0x260 fs/ntfs/inode.c:2189 but task is already holding lock: ffffffff8d31fce0 (fs_reclaim){+.+.}-{0:0}, at: balance_pgdat+0x160/0x1a90 mm/vmscan.c:6771 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:3692 [inline] fs_reclaim_acquire+0x100/0x150 mm/page_alloc.c:3706 might_alloc include/linux/sched/mm.h:303 [inline] prepare_alloc_pages.constprop.0+0x155/0x550 mm/page_alloc.c:4338 __alloc_pages+0x193/0x2440 mm/page_alloc.c:4556 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:975 do_read_cache_folio+0x1b8/0x540 mm/filemap.c:3665 do_read_cache_page mm/filemap.c:3767 [inline] read_cache_page+0x5b/0x160 mm/filemap.c:3776 read_mapping_page include/linux/pagemap.h:888 [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_open.isra.0+0x926/0x13b0 fs/namei.c:3474 open_last_lookups fs/namei.c:3565 [inline] path_openat+0x931/0x2990 fs/namei.c:3795 do_filp_open+0x1de/0x430 fs/namei.c:3825 do_sys_openat2+0x176/0x1e0 fs/open.c:1404 do_sys_open fs/open.c:1419 [inline] __do_compat_sys_openat fs/open.c:1479 [inline] __se_compat_sys_openat fs/open.c:1477 [inline] __ia32_compat_sys_openat+0x16e/0x200 fs/open.c:1477 do_syscall_32_irqs_on arch/x86/entry/common.c:165 [inline] __do_fast_syscall_32+0x79/0x110 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:608 [inline] __mutex_lock+0x175/0x9d0 kernel/locking/mutex.c:752 map_mft_record+0x4a/0x730 fs/ntfs/mft.c:154 ntfs_truncate+0x263/0x2a20 fs/ntfs/inode.c:2383 ntfs_truncate_vfs fs/ntfs/inode.c:2864 [inline] ntfs_setattr+0x44d/0x640 fs/ntfs/inode.c:2916 notify_change+0x742/0x11c0 fs/attr.c:499 do_truncate+0x15c/0x220 fs/open.c:66 handle_truncate fs/namei.c:3299 [inline] do_open fs/namei.c:3645 [inline] path_openat+0x24b6/0x2990 fs/namei.c:3798 do_filp_open+0x1de/0x430 fs/namei.c:3825 do_sys_openat2+0x176/0x1e0 fs/open.c:1404 do_sys_open fs/open.c:1419 [inline] __do_compat_sys_openat fs/open.c:1479 [inline] __se_compat_sys_openat fs/open.c:1477 [inline] __ia32_compat_sys_openat+0x16e/0x200 fs/open.c:1477 do_syscall_32_irqs_on arch/x86/entry/common.c:165 [inline] __do_fast_syscall_32+0x79/0x110 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+0x2445/0x3b30 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:665 dispose_list+0x117/0x1e0 fs/inode.c:698 prune_icache_sb+0xeb/0x150 fs/inode.c:883 super_cache_scan+0x372/0x540 fs/super.c:223 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+0x48f/0x7b0 mm/vmscan.c:4767 shrink_many mm/vmscan.c:4828 [inline] lru_gen_shrink_node mm/vmscan.c:4929 [inline] shrink_node+0x2149/0x3740 mm/vmscan.c:5888 kswapd_shrink_node mm/vmscan.c:6693 [inline] balance_pgdat+0x9d2/0x1a90 mm/vmscan.c:6883 kswapd+0x5be/0xbf0 mm/vmscan.c:7143 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: ffffffff8d31fce0 (fs_reclaim){+.+.}-{0:0}, at: balance_pgdat+0x160/0x1a90 mm/vmscan.c:6771 #1: ffff88804f08a0e0 (&type->s_umount_key#50){++++}-{3:3}, at: super_trylock_shared fs/super.c:566 [inline] #1: ffff88804f08a0e0 (&type->s_umount_key#50){++++}-{3:3}, at: super_cache_scan+0x96/0x540 fs/super.c:196 stack backtrace: CPU: 3 PID: 108 Comm: kswapd0 Not tainted 6.7.0-syzkaller-11705-gb0d326da462e #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+0x2445/0x3b30 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:665 dispose_list+0x117/0x1e0 fs/inode.c:698 prune_icache_sb+0xeb/0x150 fs/inode.c:883 super_cache_scan+0x372/0x540 fs/super.c:223 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+0x48f/0x7b0 mm/vmscan.c:4767 shrink_many mm/vmscan.c:4828 [inline] lru_gen_shrink_node mm/vmscan.c:4929 [inline] shrink_node+0x2149/0x3740 mm/vmscan.c:5888 kswapd_shrink_node mm/vmscan.c:6693 [inline] balance_pgdat+0x9d2/0x1a90 mm/vmscan.c:6883 kswapd+0x5be/0xbf0 mm/vmscan.c:7143 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