F2FS-fs (loop4): Found nat_bits in checkpoint F2FS-fs (loop4): Mounted with checkpoint version = 48b305e5 F2FS-fs (loop4): f2fs_check_nid_range: out-of-range nid=1, run fsck to fix. ====================================================== WARNING: possible circular locking dependency detected 6.2.0-rc7-syzkaller-00135-g38c1e0c65865 #0 Not tainted ------------------------------------------------------ syz-executor.4/24464 is trying to acquire lock: ffff88804a4fc088 (&sbi->sb_lock){++++}-{3:3}, at: f2fs_down_write fs/f2fs/f2fs.h:2213 [inline] ffff88804a4fc088 (&sbi->sb_lock){++++}-{3:3}, at: f2fs_handle_error+0xef/0x240 fs/f2fs/super.c:3926 but task is already holding lock: ffff88807a7af130 (&nm_i->nat_tree_lock){++++}-{3:3}, at: f2fs_down_read fs/f2fs/f2fs.h:2188 [inline] ffff88807a7af130 (&nm_i->nat_tree_lock){++++}-{3:3}, at: scan_free_nid_bits fs/f2fs/node.c:2425 [inline] ffff88807a7af130 (&nm_i->nat_tree_lock){++++}-{3:3}, at: __f2fs_build_free_nids fs/f2fs/node.c:2473 [inline] ffff88807a7af130 (&nm_i->nat_tree_lock){++++}-{3:3}, at: f2fs_build_free_nids+0x325/0x11a0 fs/f2fs/node.c:2531 which lock already depends on the new lock. the existing dependency chain (in reverse order) is: -> #3 (&nm_i->nat_tree_lock){++++}-{3:3}: lock_acquire+0x235/0x630 kernel/locking/lockdep.c:5668 down_read+0x3d/0x50 kernel/locking/rwsem.c:1509 f2fs_down_read fs/f2fs/f2fs.h:2188 [inline] f2fs_get_node_info+0xf3/0x12d0 fs/f2fs/node.c:564 f2fs_do_write_data_page+0x10c7/0x27c0 fs/f2fs/data.c:2728 f2fs_write_single_data_page+0x144e/0x2070 fs/f2fs/data.c:2863 f2fs_write_cache_pages fs/f2fs/data.c:3115 [inline] __f2fs_write_data_pages fs/f2fs/data.c:3265 [inline] f2fs_write_data_pages+0x1976/0x2e80 fs/f2fs/data.c:3292 do_writepages+0x3a6/0x670 mm/page-writeback.c:2581 filemap_fdatawrite_wbc+0x125/0x180 mm/filemap.c:388 __filemap_fdatawrite_range mm/filemap.c:421 [inline] filemap_write_and_wait_range+0x1d4/0x2c0 mm/filemap.c:674 f2fs_collapse_range+0x314/0x3b0 fs/f2fs/file.c:1443 f2fs_fallocate+0x46f/0x6d0 fs/f2fs/file.c:1837 vfs_fallocate+0x54b/0x6b0 fs/open.c:323 ksys_fallocate fs/open.c:346 [inline] __do_sys_fallocate fs/open.c:354 [inline] __se_sys_fallocate fs/open.c:352 [inline] __x64_sys_fallocate+0xbd/0x100 fs/open.c:352 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x41/0xc0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x63/0xcd -> #2 (mapping.invalidate_lock#6){++++}-{3:3}: lock_acquire+0x235/0x630 kernel/locking/lockdep.c:5668 down_read+0x3d/0x50 kernel/locking/rwsem.c:1509 filemap_invalidate_lock_shared include/linux/fs.h:811 [inline] filemap_fault+0x644/0x1800 mm/filemap.c:3146 f2fs_filemap_fault+0x81/0x3d0 fs/f2fs/file.c:44 __do_fault+0x136/0x500 mm/memory.c:4163 do_shared_fault mm/memory.c:4569 [inline] do_fault mm/memory.c:4647 [inline] handle_pte_fault mm/memory.c:4931 [inline] __handle_mm_fault mm/memory.c:5073 [inline] handle_mm_fault+0x20bb/0x51e0 mm/memory.c:5219 do_user_addr_fault arch/x86/mm/fault.c:1428 [inline] handle_page_fault arch/x86/mm/fault.c:1519 [inline] exc_page_fault+0x673/0x880 arch/x86/mm/fault.c:1575 asm_exc_page_fault+0x26/0x30 arch/x86/include/asm/idtentry.h:570 -> #1 (&mm->mmap_lock){++++}-{3:3}: lock_acquire+0x235/0x630 kernel/locking/lockdep.c:5668 __might_fault+0xba/0x120 mm/memory.c:5647 _copy_to_user+0x2a/0x130 lib/usercopy.c:29 copy_to_user include/linux/uaccess.h:169 [inline] f2fs_ioc_get_encryption_pwsalt fs/f2fs/file.c:2365 [inline] __f2fs_ioctl+0xaf1d/0xb500 fs/f2fs/file.c:4169 vfs_ioctl fs/ioctl.c:51 [inline] __do_sys_ioctl fs/ioctl.c:870 [inline] __se_sys_ioctl+0xf1/0x160 fs/ioctl.c:856 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x41/0xc0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x63/0xcd -> #0 (&sbi->sb_lock){++++}-{3:3}: check_prev_add kernel/locking/lockdep.c:3097 [inline] check_prevs_add kernel/locking/lockdep.c:3216 [inline] validate_chain+0x166b/0x58e0 kernel/locking/lockdep.c:3831 __lock_acquire+0x125b/0x1f80 kernel/locking/lockdep.c:5055 lock_acquire+0x235/0x630 kernel/locking/lockdep.c:5668 down_write+0x3a/0x60 kernel/locking/rwsem.c:1562 f2fs_down_write fs/f2fs/f2fs.h:2213 [inline] f2fs_handle_error+0xef/0x240 fs/f2fs/super.c:3926 scan_free_nid_bits fs/f2fs/node.c:2439 [inline] __f2fs_build_free_nids fs/f2fs/node.c:2473 [inline] f2fs_build_free_nids+0x514/0x11a0 fs/f2fs/node.c:2531 f2fs_alloc_nid+0x221/0x740 fs/f2fs/node.c:2577 f2fs_new_inode+0x135/0x1090 fs/f2fs/namei.c:221 f2fs_mkdir+0x127/0x530 fs/f2fs/namei.c:756 vfs_mkdir+0x3ba/0x590 fs/namei.c:4036 do_mkdirat+0x246/0x500 fs/namei.c:4061 __do_sys_mkdirat fs/namei.c:4076 [inline] __se_sys_mkdirat fs/namei.c:4074 [inline] __x64_sys_mkdirat+0x89/0xa0 fs/namei.c:4074 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x41/0xc0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x63/0xcd other info that might help us debug this: Chain exists of: &sbi->sb_lock --> mapping.invalidate_lock#6 --> &nm_i->nat_tree_lock Possible unsafe locking scenario: CPU0 CPU1 ---- ---- lock(&nm_i->nat_tree_lock); lock(mapping.invalidate_lock#6); lock(&nm_i->nat_tree_lock); lock(&sbi->sb_lock); *** DEADLOCK *** 4 locks held by syz-executor.4/24464: #0: ffff88807678a460 (sb_writers#13){.+.+}-{0:0}, at: mnt_want_write+0x3f/0x90 fs/namespace.c:508 #1: ffff88804b1d6c90 (&type->i_mutex_dir_key#10/1){+.+.}-{3:3}, at: inode_lock_nested include/linux/fs.h:791 [inline] #1: ffff88804b1d6c90 (&type->i_mutex_dir_key#10/1){+.+.}-{3:3}, at: filename_create+0x25a/0x530 fs/namei.c:3807 #2: ffff88807a7af2c8 (&nm_i->build_lock){+.+.}-{3:3}, at: f2fs_build_free_nids+0xcc/0x11a0 fs/f2fs/node.c:2530 #3: ffff88807a7af130 (&nm_i->nat_tree_lock){++++}-{3:3}, at: f2fs_down_read fs/f2fs/f2fs.h:2188 [inline] #3: ffff88807a7af130 (&nm_i->nat_tree_lock){++++}-{3:3}, at: scan_free_nid_bits fs/f2fs/node.c:2425 [inline] #3: ffff88807a7af130 (&nm_i->nat_tree_lock){++++}-{3:3}, at: __f2fs_build_free_nids fs/f2fs/node.c:2473 [inline] #3: ffff88807a7af130 (&nm_i->nat_tree_lock){++++}-{3:3}, at: f2fs_build_free_nids+0x325/0x11a0 fs/f2fs/node.c:2531 stack backtrace: CPU: 1 PID: 24464 Comm: syz-executor.4 Not tainted 6.2.0-rc7-syzkaller-00135-g38c1e0c65865 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/21/2023 Call Trace: __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0x1e7/0x2d0 lib/dump_stack.c:106 check_noncircular+0x2fe/0x3b0 kernel/locking/lockdep.c:2177 check_prev_add kernel/locking/lockdep.c:3097 [inline] check_prevs_add kernel/locking/lockdep.c:3216 [inline] validate_chain+0x166b/0x58e0 kernel/locking/lockdep.c:3831 __lock_acquire+0x125b/0x1f80 kernel/locking/lockdep.c:5055 lock_acquire+0x235/0x630 kernel/locking/lockdep.c:5668 down_write+0x3a/0x60 kernel/locking/rwsem.c:1562 f2fs_down_write fs/f2fs/f2fs.h:2213 [inline] f2fs_handle_error+0xef/0x240 fs/f2fs/super.c:3926 scan_free_nid_bits fs/f2fs/node.c:2439 [inline] __f2fs_build_free_nids fs/f2fs/node.c:2473 [inline] f2fs_build_free_nids+0x514/0x11a0 fs/f2fs/node.c:2531 f2fs_alloc_nid+0x221/0x740 fs/f2fs/node.c:2577 f2fs_new_inode+0x135/0x1090 fs/f2fs/namei.c:221 f2fs_mkdir+0x127/0x530 fs/f2fs/namei.c:756 vfs_mkdir+0x3ba/0x590 fs/namei.c:4036 do_mkdirat+0x246/0x500 fs/namei.c:4061 __do_sys_mkdirat fs/namei.c:4076 [inline] __se_sys_mkdirat fs/namei.c:4074 [inline] __x64_sys_mkdirat+0x89/0xa0 fs/namei.c:4074 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x41/0xc0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x63/0xcd RIP: 0033:0x7fe3b408c0f9 Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 f1 19 00 00 90 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 b8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007fe3b4d55168 EFLAGS: 00000246 ORIG_RAX: 0000000000000102 RAX: ffffffffffffffda RBX: 00007fe3b41abf80 RCX: 00007fe3b408c0f9 RDX: 0000000000000000 RSI: 0000000020000000 RDI: ffffffffffffff9c RBP: 00007fe3b40e7ae9 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007ffcdab4006f R14: 00007fe3b4d55300 R15: 0000000000022000 F2FS-fs (loop4): f2fs_check_nid_range: out-of-range nid=2, run fsck to fix.