====================================================== WARNING: possible circular locking dependency detected 6.9.0-syzkaller-09699-geb6a9339efeb #0 Not tainted ------------------------------------------------------ kswapd0/111 is trying to acquire lock: ffff88801f1a1118 (mapping.invalidate_lock#8){++++}-{3:3}, at: filemap_invalidate_lock include/linux/fs.h:836 [inline] ffff88801f1a1118 (mapping.invalidate_lock#8){++++}-{3:3}, at: udf_setsize+0x256/0x1180 fs/udf/inode.c:1254 but task is already holding lock: ffffffff8dd3a860 (fs_reclaim){+.+.}-{0:0}, at: balance_pgdat+0x166/0x1970 mm/vmscan.c:6798 which lock already depends on the new lock. the existing dependency chain (in reverse order) is: -> #1 (fs_reclaim){+.+.}-{0:0}: __fs_reclaim_acquire mm/page_alloc.c:3783 [inline] fs_reclaim_acquire+0x102/0x160 mm/page_alloc.c:3797 might_alloc include/linux/sched/mm.h:334 [inline] prepare_alloc_pages.constprop.0+0x155/0x560 mm/page_alloc.c:4431 __alloc_pages_noprof+0x194/0x2460 mm/page_alloc.c:4649 alloc_pages_mpol_noprof+0x275/0x610 mm/mempolicy.c:2265 folio_alloc_noprof+0x1e/0xc0 mm/mempolicy.c:2343 filemap_alloc_folio_noprof+0x3ba/0x490 mm/filemap.c:1008 __filemap_get_folio+0x51e/0xa80 mm/filemap.c:1950 filemap_grab_folio include/linux/pagemap.h:689 [inline] block_truncate_page+0x148/0x750 fs/buffer.c:2679 udf_setsize+0x31a/0x1180 fs/udf/inode.c:1286 udf_setattr+0x4f1/0x640 fs/udf/file.c:235 notify_change+0x742/0x11c0 fs/attr.c:497 do_truncate+0x15c/0x220 fs/open.c:65 do_ftruncate+0x5e5/0x720 fs/open.c:181 __ia32_compat_sys_ftruncate+0x8a/0xe0 fs/open.c:211 do_syscall_32_irqs_on arch/x86/entry/common.c:165 [inline] __do_fast_syscall_32+0x75/0x120 arch/x86/entry/common.c:386 do_fast_syscall_32+0x32/0x80 arch/x86/entry/common.c:411 entry_SYSENTER_compat_after_hwframe+0x84/0x8e -> #0 (mapping.invalidate_lock#8){++++}-{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+0x2478/0x3b30 kernel/locking/lockdep.c:5137 lock_acquire kernel/locking/lockdep.c:5754 [inline] lock_acquire+0x1b1/0x560 kernel/locking/lockdep.c:5719 down_write+0x3a/0x50 kernel/locking/rwsem.c:1579 filemap_invalidate_lock include/linux/fs.h:836 [inline] udf_setsize+0x256/0x1180 fs/udf/inode.c:1254 udf_evict_inode+0x361/0x590 fs/udf/inode.c:144 evict+0x2ed/0x6c0 fs/inode.c:667 iput_final fs/inode.c:1741 [inline] iput.part.0+0x5a8/0x7f0 fs/inode.c:1767 iput+0x5c/0x80 fs/inode.c:1757 dentry_unlink_inode+0x295/0x440 fs/dcache.c:400 __dentry_kill+0x1d0/0x600 fs/dcache.c:603 shrink_kill fs/dcache.c:1048 [inline] shrink_dentry_list+0x140/0x5d0 fs/dcache.c:1075 prune_dcache_sb+0xeb/0x150 fs/dcache.c:1156 super_cache_scan+0x32a/0x550 fs/super.c:221 do_shrink_slab+0x44f/0x11c0 mm/shrinker.c:435 shrink_slab_memcg mm/shrinker.c:548 [inline] shrink_slab+0xa87/0x1310 mm/shrinker.c:626 shrink_one+0x493/0x7c0 mm/vmscan.c:4790 shrink_many mm/vmscan.c:4851 [inline] lru_gen_shrink_node+0x89f/0x1750 mm/vmscan.c:4951 shrink_node mm/vmscan.c:5910 [inline] kswapd_shrink_node mm/vmscan.c:6720 [inline] balance_pgdat+0x1105/0x1970 mm/vmscan.c:6911 kswapd+0x5ea/0xbf0 mm/vmscan.c:7180 kthread+0x2c1/0x3a0 kernel/kthread.c:389 ret_from_fork+0x45/0x80 arch/x86/kernel/process.c:147 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244 other info that might help us debug this: Possible unsafe locking scenario: CPU0 CPU1 ---- ---- lock(fs_reclaim); lock(mapping.invalidate_lock#8); lock(fs_reclaim); lock(mapping.invalidate_lock#8); *** DEADLOCK *** 2 locks held by kswapd0/111: #0: ffffffff8dd3a860 (fs_reclaim){+.+.}-{0:0}, at: balance_pgdat+0x166/0x1970 mm/vmscan.c:6798 #1: ffff88801c7940e0 (&type->s_umount_key#85){++++}-{3:3}, at: super_trylock_shared fs/super.c:561 [inline] #1: ffff88801c7940e0 (&type->s_umount_key#85){++++}-{3:3}, at: super_cache_scan+0x96/0x550 fs/super.c:196 stack backtrace: CPU: 2 PID: 111 Comm: kswapd0 Not tainted 6.9.0-syzkaller-09699-geb6a9339efeb #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+0x116/0x1f0 lib/dump_stack.c:114 check_noncircular+0x31a/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+0x2478/0x3b30 kernel/locking/lockdep.c:5137 lock_acquire kernel/locking/lockdep.c:5754 [inline] lock_acquire+0x1b1/0x560 kernel/locking/lockdep.c:5719 down_write+0x3a/0x50 kernel/locking/rwsem.c:1579 filemap_invalidate_lock include/linux/fs.h:836 [inline] udf_setsize+0x256/0x1180 fs/udf/inode.c:1254 udf_evict_inode+0x361/0x590 fs/udf/inode.c:144 evict+0x2ed/0x6c0 fs/inode.c:667 iput_final fs/inode.c:1741 [inline] iput.part.0+0x5a8/0x7f0 fs/inode.c:1767 iput+0x5c/0x80 fs/inode.c:1757 dentry_unlink_inode+0x295/0x440 fs/dcache.c:400 __dentry_kill+0x1d0/0x600 fs/dcache.c:603 shrink_kill fs/dcache.c:1048 [inline] shrink_dentry_list+0x140/0x5d0 fs/dcache.c:1075 prune_dcache_sb+0xeb/0x150 fs/dcache.c:1156 super_cache_scan+0x32a/0x550 fs/super.c:221 do_shrink_slab+0x44f/0x11c0 mm/shrinker.c:435 shrink_slab_memcg mm/shrinker.c:548 [inline] shrink_slab+0xa87/0x1310 mm/shrinker.c:626 shrink_one+0x493/0x7c0 mm/vmscan.c:4790 shrink_many mm/vmscan.c:4851 [inline] lru_gen_shrink_node+0x89f/0x1750 mm/vmscan.c:4951 shrink_node mm/vmscan.c:5910 [inline] kswapd_shrink_node mm/vmscan.c:6720 [inline] balance_pgdat+0x1105/0x1970 mm/vmscan.c:6911 kswapd+0x5ea/0xbf0 mm/vmscan.c:7180 kthread+0x2c1/0x3a0 kernel/kthread.c:389 ret_from_fork+0x45/0x80 arch/x86/kernel/process.c:147 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244