====================================================== WARNING: possible circular locking dependency detected 6.6.0-rc5-syzkaller-00157-ge8c127b05766 #0 Not tainted ------------------------------------------------------ kswapd0/107 is trying to acquire lock: ffff88803811e380 (&rl->lock){++++}-{3:3}, at: __ntfs_clear_inode+0x24/0x260 fs/ntfs/inode.c:2189 but task is already holding lock: ffffffff8cd0f1a0 (fs_reclaim){+.+.}-{0:0}, at: balance_pgdat+0x1b4/0x1b80 mm/vmscan.c:7409 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:3551 [inline] fs_reclaim_acquire+0x100/0x150 mm/page_alloc.c:3565 might_alloc include/linux/sched/mm.h:303 [inline] prepare_alloc_pages.constprop.0+0x155/0x550 mm/page_alloc.c:4197 __alloc_pages+0x14e/0x4a0 mm/page_alloc.c:4415 alloc_pages+0x1a9/0x270 mm/mempolicy.c:2297 folio_alloc+0x1e/0x60 mm/mempolicy.c:2307 filemap_alloc_folio+0x3bb/0x490 mm/filemap.c:976 do_read_cache_folio+0x1b8/0x540 mm/filemap.c:3706 do_read_cache_page mm/filemap.c:3808 [inline] read_cache_page+0x5b/0x230 mm/filemap.c:3817 read_mapping_page include/linux/pagemap.h:860 [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+0x8dc/0x1360 fs/namei.c:3473 open_last_lookups fs/namei.c:3563 [inline] path_openat+0x931/0x29c0 fs/namei.c:3793 do_filp_open+0x1de/0x430 fs/namei.c:3823 do_sys_openat2+0x176/0x1e0 fs/open.c:1422 do_sys_open fs/open.c:1437 [inline] __do_sys_openat fs/open.c:1453 [inline] __se_sys_openat fs/open.c:1448 [inline] __x64_sys_openat+0x175/0x210 fs/open.c:1448 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x38/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x63/0xcd -> #1 (&ni->mrec_lock){+.+.}-{3:3}: __mutex_lock_common kernel/locking/mutex.c:603 [inline] __mutex_lock+0x181/0x1340 kernel/locking/mutex.c:747 map_mft_record+0x4a/0x730 fs/ntfs/mft.c:154 ntfs_attr_extend_allocation+0x268/0x3830 fs/ntfs/attrib.c:2002 ntfs_prepare_file_for_write fs/ntfs/file.c:391 [inline] ntfs_file_write_iter+0xa98/0x1e00 fs/ntfs/file.c:1914 call_write_iter include/linux/fs.h:1956 [inline] new_sync_write fs/read_write.c:491 [inline] vfs_write+0x650/0xe40 fs/read_write.c:584 ksys_write+0x12f/0x250 fs/read_write.c:637 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x38/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x63/0xcd -> #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:3868 [inline] __lock_acquire+0x2e3d/0x5de0 kernel/locking/lockdep.c:5136 lock_acquire kernel/locking/lockdep.c:5753 [inline] lock_acquire+0x1ae/0x510 kernel/locking/lockdep.c:5718 down_write+0x93/0x200 kernel/locking/rwsem.c:1573 __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:664 dispose_list+0x117/0x1e0 fs/inode.c:697 prune_icache_sb+0xeb/0x150 fs/inode.c:882 super_cache_scan+0x36b/0x540 fs/super.c:230 do_shrink_slab+0x422/0xaa0 mm/vmscan.c:900 shrink_slab_memcg mm/vmscan.c:969 [inline] shrink_slab+0x48b/0x6e0 mm/vmscan.c:1048 shrink_one+0x4f7/0x700 mm/vmscan.c:5417 shrink_many mm/vmscan.c:5469 [inline] lru_gen_shrink_node mm/vmscan.c:5586 [inline] shrink_node+0x20d4/0x37a0 mm/vmscan.c:6526 kswapd_shrink_node mm/vmscan.c:7331 [inline] balance_pgdat+0xa32/0x1b80 mm/vmscan.c:7521 kswapd+0x5be/0xbf0 mm/vmscan.c:7781 kthread+0x33c/0x440 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:304 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 *** 3 locks held by kswapd0/107: #0: ffffffff8cd0f1a0 (fs_reclaim){+.+.}-{0:0}, at: balance_pgdat+0x1b4/0x1b80 mm/vmscan.c:7409 #1: ffffffff8ccc0310 (shrinker_rwsem){++++}-{3:3}, at: shrink_slab_memcg mm/vmscan.c:942 [inline] #1: ffffffff8ccc0310 (shrinker_rwsem){++++}-{3:3}, at: shrink_slab+0x2b0/0x6e0 mm/vmscan.c:1048 #2: ffff8880306780e0 (&type->s_umount_key#71){++++}-{3:3}, at: super_trylock_shared fs/super.c:607 [inline] #2: ffff8880306780e0 (&type->s_umount_key#71){++++}-{3:3}, at: super_cache_scan+0x74/0x540 fs/super.c:203 stack backtrace: CPU: 1 PID: 107 Comm: kswapd0 Not tainted 6.6.0-rc5-syzkaller-00157-ge8c127b05766 #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+0x311/0x3f0 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:3868 [inline] __lock_acquire+0x2e3d/0x5de0 kernel/locking/lockdep.c:5136 lock_acquire kernel/locking/lockdep.c:5753 [inline] lock_acquire+0x1ae/0x510 kernel/locking/lockdep.c:5718 down_write+0x93/0x200 kernel/locking/rwsem.c:1573 __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:664 dispose_list+0x117/0x1e0 fs/inode.c:697 prune_icache_sb+0xeb/0x150 fs/inode.c:882 super_cache_scan+0x36b/0x540 fs/super.c:230 do_shrink_slab+0x422/0xaa0 mm/vmscan.c:900 shrink_slab_memcg mm/vmscan.c:969 [inline] shrink_slab+0x48b/0x6e0 mm/vmscan.c:1048 shrink_one+0x4f7/0x700 mm/vmscan.c:5417 shrink_many mm/vmscan.c:5469 [inline] lru_gen_shrink_node mm/vmscan.c:5586 [inline] shrink_node+0x20d4/0x37a0 mm/vmscan.c:6526 kswapd_shrink_node mm/vmscan.c:7331 [inline] balance_pgdat+0xa32/0x1b80 mm/vmscan.c:7521 kswapd+0x5be/0xbf0 mm/vmscan.c:7781 kthread+0x33c/0x440 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:304