F2FS-fs (loop4): Found nat_bits in checkpoint F2FS-fs (loop4): Try to recover 1th superblock, ret: 0 F2FS-fs (loop4): Mounted with checkpoint version = 753bd00b ====================================================== WARNING: possible circular locking dependency detected 6.2.0-syzkaller-02019-g89f5349e0673 #0 Not tainted ------------------------------------------------------ syz-executor.4/31202 is trying to acquire lock: ffff88801dad6498 (&mm->mmap_lock){++++}-{3:3}, at: __might_fault+0x93/0x120 mm/memory.c:5649 but task is already holding lock: ffff8880767bc088 (&sbi->sb_lock){++++}-{3:3}, at: f2fs_down_write fs/f2fs/f2fs.h:2213 [inline] ffff8880767bc088 (&sbi->sb_lock){++++}-{3:3}, at: f2fs_ioc_get_encryption_pwsalt fs/f2fs/file.c:2350 [inline] ffff8880767bc088 (&sbi->sb_lock){++++}-{3:3}, at: __f2fs_ioctl+0x362b/0xb4c0 fs/f2fs/file.c:4169 which lock already depends on the new lock. the existing dependency chain (in reverse order) is: -> #6 (&sbi->sb_lock){++++}-{3:3}: lock_acquire+0x235/0x630 kernel/locking/lockdep.c:5669 down_write+0x3a/0x50 kernel/locking/rwsem.c:1573 f2fs_down_write fs/f2fs/f2fs.h:2213 [inline] f2fs_handle_error+0xef/0x240 fs/f2fs/super.c:3920 check_block_count+0x35b/0x490 build_sit_entries+0x110f/0x1c80 fs/f2fs/segment.c:4470 f2fs_build_segment_manager+0x201f/0x31d0 fs/f2fs/segment.c:5159 f2fs_fill_super+0x53d5/0x7c90 fs/f2fs/super.c:4322 mount_bdev+0x271/0x3a0 fs/super.c:1371 legacy_get_tree+0xef/0x190 fs/fs_context.c:610 vfs_get_tree+0x8c/0x270 fs/super.c:1501 do_new_mount+0x28f/0xae0 fs/namespace.c:3031 do_mount fs/namespace.c:3374 [inline] __do_sys_mount fs/namespace.c:3583 [inline] __se_sys_mount+0x2d9/0x3c0 fs/namespace.c:3560 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 -> #5 (&array[i].journal_rwsem){++++}-{3:3}: lock_acquire+0x235/0x630 kernel/locking/lockdep.c:5669 down_read+0x3d/0x50 kernel/locking/rwsem.c:1520 scan_curseg_cache+0xa6/0x410 fs/f2fs/node.c:2404 __f2fs_build_free_nids fs/f2fs/node.c:2516 [inline] f2fs_build_free_nids+0xf13/0x11a0 fs/f2fs/node.c:2531 f2fs_fill_super+0x5413/0x7c90 fs/f2fs/super.c:4328 mount_bdev+0x271/0x3a0 fs/super.c:1371 legacy_get_tree+0xef/0x190 fs/fs_context.c:610 vfs_get_tree+0x8c/0x270 fs/super.c:1501 do_new_mount+0x28f/0xae0 fs/namespace.c:3031 do_mount fs/namespace.c:3374 [inline] __do_sys_mount fs/namespace.c:3583 [inline] __se_sys_mount+0x2d9/0x3c0 fs/namespace.c:3560 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 -> #4 (&nm_i->nat_tree_lock){++++}-{3:3}: lock_acquire+0x235/0x630 kernel/locking/lockdep.c:5669 down_read+0x3d/0x50 kernel/locking/rwsem.c:1520 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:2727 f2fs_write_single_data_page+0x144e/0x2070 fs/f2fs/data.c:2862 f2fs_write_cache_pages fs/f2fs/data.c:3114 [inline] __f2fs_write_data_pages fs/f2fs/data.c:3264 [inline] f2fs_write_data_pages+0x1976/0x2e80 fs/f2fs/data.c:3291 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] file_write_and_wait_range+0x20f/0x300 mm/filemap.c:777 f2fs_do_sync_file+0x7b6/0x1de0 fs/f2fs/file.c:275 generic_write_sync include/linux/fs.h:2450 [inline] f2fs_file_write_iter+0x7fc/0x2c20 fs/f2fs/file.c:4721 do_iter_write+0x6ea/0xc50 fs/read_write.c:861 iter_file_splice_write+0x843/0xfe0 fs/splice.c:685 do_splice_from fs/splice.c:763 [inline] direct_splice_actor+0xe7/0x1c0 fs/splice.c:930 splice_direct_to_actor+0x4c4/0xbd0 fs/splice.c:885 do_splice_direct+0x283/0x3d0 fs/splice.c:973 do_sendfile+0x620/0xff0 fs/read_write.c:1255 __do_sys_sendfile64 fs/read_write.c:1323 [inline] __se_sys_sendfile64+0x17c/0x1e0 fs/read_write.c:1309 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 -> #3 (&sbi->cp_rwsem){++++}-{3:3}: lock_acquire+0x235/0x630 kernel/locking/lockdep.c:5669 down_read+0x3d/0x50 kernel/locking/rwsem.c:1520 f2fs_down_read fs/f2fs/f2fs.h:2188 [inline] f2fs_lock_op fs/f2fs/f2fs.h:2231 [inline] f2fs_do_truncate_blocks+0x24e/0xf80 fs/f2fs/file.c:688 f2fs_truncate_blocks+0x10d/0x2f0 fs/f2fs/file.c:751 f2fs_truncate+0x4b6/0x8b0 fs/f2fs/file.c:803 f2fs_setattr+0xbf1/0x1270 fs/f2fs/file.c:1010 notify_change+0xc8b/0xf40 fs/attr.c:482 do_truncate+0x220/0x300 fs/open.c:66 handle_truncate fs/namei.c:3219 [inline] do_open fs/namei.c:3564 [inline] path_openat+0x293f/0x3160 fs/namei.c:3715 do_filp_open+0x234/0x490 fs/namei.c:3742 do_sys_openat2+0x13f/0x500 fs/open.c:1312 do_sys_open fs/open.c:1328 [inline] __do_sys_open fs/open.c:1336 [inline] __se_sys_open fs/open.c:1332 [inline] __x64_sys_open+0x225/0x270 fs/open.c:1332 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:5669 down_read+0x3d/0x50 kernel/locking/rwsem.c:1520 filemap_invalidate_lock_shared include/linux/fs.h:811 [inline] f2fs_vm_page_mkwrite+0x547/0x1440 fs/f2fs/file.c:104 do_page_mkwrite+0x1a1/0x600 mm/memory.c:2943 do_shared_fault mm/memory.c:4582 [inline] do_fault mm/memory.c:4650 [inline] handle_pte_fault mm/memory.c:4934 [inline] __handle_mm_fault mm/memory.c:5076 [inline] handle_mm_fault+0x2163/0x51e0 mm/memory.c:5222 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 (sb_pagefaults#5){.+.+}-{0:0}: lock_acquire+0x235/0x630 kernel/locking/lockdep.c:5669 percpu_down_read include/linux/percpu-rwsem.h:51 [inline] __sb_start_write+0x58/0x1a0 include/linux/fs.h:1475 sb_start_pagefault include/linux/fs.h:1579 [inline] f2fs_vm_page_mkwrite+0x47b/0x1440 fs/f2fs/file.c:99 do_page_mkwrite+0x1a1/0x600 mm/memory.c:2943 do_shared_fault mm/memory.c:4582 [inline] do_fault mm/memory.c:4650 [inline] handle_pte_fault mm/memory.c:4934 [inline] __handle_mm_fault mm/memory.c:5076 [inline] handle_mm_fault+0x2163/0x51e0 mm/memory.c:5222 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 -> #0 (&mm->mmap_lock){++++}-{3:3}: check_prev_add kernel/locking/lockdep.c:3098 [inline] check_prevs_add kernel/locking/lockdep.c:3217 [inline] validate_chain+0x166b/0x58e0 kernel/locking/lockdep.c:3832 __lock_acquire+0x125b/0x1f80 kernel/locking/lockdep.c:5056 lock_acquire+0x235/0x630 kernel/locking/lockdep.c:5669 __might_fault+0xba/0x120 mm/memory.c:5650 _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+0xaedc/0xb4c0 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 other info that might help us debug this: Chain exists of: &mm->mmap_lock --> &array[i].journal_rwsem --> &sbi->sb_lock Possible unsafe locking scenario: CPU0 CPU1 ---- ---- lock(&sbi->sb_lock); lock(&array[i].journal_rwsem); lock(&sbi->sb_lock); lock(&mm->mmap_lock); *** DEADLOCK *** 2 locks held by syz-executor.4/31202: #0: ffff888078c6e460 (sb_writers#23){.+.+}-{0:0}, at: mnt_want_write_file+0x5e/0x1f0 fs/namespace.c:438 #1: ffff8880767bc088 (&sbi->sb_lock){++++}-{3:3}, at: f2fs_down_write fs/f2fs/f2fs.h:2213 [inline] #1: ffff8880767bc088 (&sbi->sb_lock){++++}-{3:3}, at: f2fs_ioc_get_encryption_pwsalt fs/f2fs/file.c:2350 [inline] #1: ffff8880767bc088 (&sbi->sb_lock){++++}-{3:3}, at: __f2fs_ioctl+0x362b/0xb4c0 fs/f2fs/file.c:4169 stack backtrace: CPU: 1 PID: 31202 Comm: syz-executor.4 Not tainted 6.2.0-syzkaller-02019-g89f5349e0673 #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:2178 check_prev_add kernel/locking/lockdep.c:3098 [inline] check_prevs_add kernel/locking/lockdep.c:3217 [inline] validate_chain+0x166b/0x58e0 kernel/locking/lockdep.c:3832 __lock_acquire+0x125b/0x1f80 kernel/locking/lockdep.c:5056 lock_acquire+0x235/0x630 kernel/locking/lockdep.c:5669 __might_fault+0xba/0x120 mm/memory.c:5650 _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+0xaedc/0xb4c0 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 RIP: 0033:0x7f161728c0f9 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:00007f1617fc2168 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 00007f16173abf80 RCX: 00007f161728c0f9 RDX: 0000000000000000 RSI: 0000000040106614 RDI: 0000000000000004 RBP: 00007f16172e7ae9 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007fffc20d7b6f R14: 00007f1617fc2300 R15: 0000000000022000