loop3: detected capacity change from 0 to 40427 F2FS-fs (loop3): Found nat_bits in checkpoint F2FS-fs (loop3): Mounted with checkpoint version = 48b305e5 ====================================================== WARNING: possible circular locking dependency detected 6.2.0-rc4-syzkaller-00077-gd368967cb103 #0 Not tainted ------------------------------------------------------ syz-executor.3/19826 is trying to acquire lock: ffff88807aff83b0 (&sbi->cp_rwsem){++++}-{3:3}, at: f2fs_down_read fs/f2fs/f2fs.h:2188 [inline] ffff88807aff83b0 (&sbi->cp_rwsem){++++}-{3:3}, at: f2fs_lock_op fs/f2fs/f2fs.h:2231 [inline] ffff88807aff83b0 (&sbi->cp_rwsem){++++}-{3:3}, at: f2fs_convert_inline_inode+0x55f/0x820 fs/f2fs/inline.c:219 but task is already holding lock: ffff88801286d8d8 (&mm->mmap_lock){++++}-{3:3}, at: mmap_read_trylock include/linux/mmap_lock.h:136 [inline] ffff88801286d8d8 (&mm->mmap_lock){++++}-{3:3}, at: do_user_addr_fault+0x2e2/0xcb0 arch/x86/mm/fault.c:1369 which lock already depends on the new lock. the existing dependency chain (in reverse order) is: -> #3 (&mm->mmap_lock){++++}-{3:3}: lock_acquire+0x182/0x3c0 kernel/locking/lockdep.c:5668 __might_fault+0xb2/0x110 mm/memory.c:5647 _copy_to_user+0x26/0x130 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+0xaf72/0xb540 fs/f2fs/file.c:4169 vfs_ioctl fs/ioctl.c:51 [inline] __do_sys_ioctl fs/ioctl.c:870 [inline] __se_sys_ioctl+0xfb/0x170 fs/ioctl.c:856 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x3d/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x63/0xcd -> #2 (&sbi->sb_lock){++++}-{3:3}: lock_acquire+0x182/0x3c0 kernel/locking/lockdep.c:5668 down_write+0x9c/0x270 kernel/locking/rwsem.c:1562 f2fs_down_write fs/f2fs/f2fs.h:2213 [inline] f2fs_handle_error+0xe0/0x230 fs/f2fs/super.c:3926 scan_nat_page fs/f2fs/node.c:2387 [inline] __f2fs_build_free_nids fs/f2fs/node.c:2493 [inline] f2fs_build_free_nids+0xb8c/0x1190 fs/f2fs/node.c:2531 f2fs_fill_super+0x4a5f/0x6ee0 fs/f2fs/super.c:4334 mount_bdev+0x26c/0x3a0 fs/super.c:1359 legacy_get_tree+0xea/0x180 fs/fs_context.c:610 vfs_get_tree+0x88/0x270 fs/super.c:1489 do_new_mount+0x289/0xad0 fs/namespace.c:3145 do_mount fs/namespace.c:3488 [inline] __do_sys_mount fs/namespace.c:3697 [inline] __se_sys_mount+0x2d3/0x3c0 fs/namespace.c:3674 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x3d/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x63/0xcd -> #1 (&nm_i->nat_tree_lock){++++}-{3:3}: lock_acquire+0x182/0x3c0 kernel/locking/lockdep.c:5668 down_read+0x39/0x50 kernel/locking/rwsem.c:1509 f2fs_down_read fs/f2fs/f2fs.h:2188 [inline] f2fs_get_node_info+0x100/0x1720 fs/f2fs/node.c:564 f2fs_new_node_page+0x402/0xea0 fs/f2fs/node.c:1295 f2fs_get_dnode_of_data+0x5b0/0x1da0 fs/f2fs/node.c:810 f2fs_reserve_block+0x50/0x240 fs/f2fs/data.c:1199 f2fs_get_new_data_page+0x180/0x7b0 fs/f2fs/data.c:1387 f2fs_add_regular_entry+0x687/0xea0 fs/f2fs/dir.c:754 f2fs_add_dentry fs/f2fs/dir.c:816 [inline] f2fs_do_add_link+0x2a7/0x470 fs/f2fs/dir.c:855 f2fs_add_link fs/f2fs/f2fs.h:3564 [inline] f2fs_create+0x324/0x530 fs/f2fs/namei.c:363 lookup_open fs/namei.c:3413 [inline] open_last_lookups fs/namei.c:3481 [inline] path_openat+0x12ac/0x2dd0 fs/namei.c:3711 do_filp_open+0x264/0x4f0 fs/namei.c:3741 do_sys_openat2+0x124/0x4e0 fs/open.c:1310 do_sys_open fs/open.c:1326 [inline] __do_sys_open fs/open.c:1334 [inline] __se_sys_open fs/open.c:1330 [inline] __x64_sys_open+0x221/0x270 fs/open.c:1330 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x3d/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x63/0xcd -> #0 (&sbi->cp_rwsem){++++}-{3:3}: check_prev_add kernel/locking/lockdep.c:3097 [inline] check_prevs_add kernel/locking/lockdep.c:3216 [inline] validate_chain+0x1898/0x6ae0 kernel/locking/lockdep.c:3831 __lock_acquire+0x1292/0x1f60 kernel/locking/lockdep.c:5055 lock_acquire+0x182/0x3c0 kernel/locking/lockdep.c:5668 down_read+0x39/0x50 kernel/locking/rwsem.c:1509 f2fs_down_read fs/f2fs/f2fs.h:2188 [inline] f2fs_lock_op fs/f2fs/f2fs.h:2231 [inline] f2fs_convert_inline_inode+0x55f/0x820 fs/f2fs/inline.c:219 f2fs_vm_page_mkwrite+0x2d8/0x1350 fs/f2fs/file.c:79 do_page_mkwrite+0x19e/0x5e0 mm/memory.c:2947 do_shared_fault mm/memory.c:4579 [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+0x1952/0x26b0 mm/memory.c:5219 do_user_addr_fault+0x69b/0xcb0 arch/x86/mm/fault.c:1428 handle_page_fault arch/x86/mm/fault.c:1519 [inline] exc_page_fault+0x7a/0x110 arch/x86/mm/fault.c:1575 asm_exc_page_fault+0x22/0x30 arch/x86/include/asm/idtentry.h:570 copy_user_short_string+0x24/0x40 arch/x86/lib/copy_user_64.S:242 copy_user_generic arch/x86/include/asm/uaccess_64.h:37 [inline] raw_copy_to_user arch/x86/include/asm/uaccess_64.h:58 [inline] copyout lib/iov_iter.c:170 [inline] _copy_to_iter+0x2e1/0x1020 lib/iov_iter.c:529 copy_page_to_iter+0xf0/0x250 lib/iov_iter.c:727 copy_folio_to_iter include/linux/uio.h:172 [inline] filemap_read+0x790/0xea0 mm/filemap.c:2745 f2fs_file_read_iter+0x139/0xc00 fs/f2fs/file.c:4374 call_read_iter include/linux/fs.h:2183 [inline] new_sync_read fs/read_write.c:389 [inline] vfs_read+0x7ac/0xbf0 fs/read_write.c:470 ksys_read+0x177/0x2a0 fs/read_write.c:613 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x3d/0xb0 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->cp_rwsem --> &sbi->sb_lock --> &mm->mmap_lock Possible unsafe locking scenario: CPU0 CPU1 ---- ---- lock(&mm->mmap_lock); lock(&sbi->sb_lock); lock(&mm->mmap_lock); lock(&sbi->cp_rwsem); *** DEADLOCK *** 2 locks held by syz-executor.3/19826: #0: ffff88807755efe8 (&f->f_pos_lock){+.+.}-{3:3}, at: __fdget_pos+0x242/0x2e0 fs/file.c:1046 #1: ffff88801286d8d8 (&mm->mmap_lock){++++}-{3:3}, at: mmap_read_trylock include/linux/mmap_lock.h:136 [inline] #1: ffff88801286d8d8 (&mm->mmap_lock){++++}-{3:3}, at: do_user_addr_fault+0x2e2/0xcb0 arch/x86/mm/fault.c:1369 stack backtrace: CPU: 1 PID: 19826 Comm: syz-executor.3 Not tainted 6.2.0-rc4-syzkaller-00077-gd368967cb103 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/12/2023 Call Trace: __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0x1b1/0x290 lib/dump_stack.c:106 check_noncircular+0x2cc/0x390 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+0x1898/0x6ae0 kernel/locking/lockdep.c:3831 __lock_acquire+0x1292/0x1f60 kernel/locking/lockdep.c:5055 lock_acquire+0x182/0x3c0 kernel/locking/lockdep.c:5668 down_read+0x39/0x50 kernel/locking/rwsem.c:1509 f2fs_down_read fs/f2fs/f2fs.h:2188 [inline] f2fs_lock_op fs/f2fs/f2fs.h:2231 [inline] f2fs_convert_inline_inode+0x55f/0x820 fs/f2fs/inline.c:219 f2fs_vm_page_mkwrite+0x2d8/0x1350 fs/f2fs/file.c:79 do_page_mkwrite+0x19e/0x5e0 mm/memory.c:2947 do_shared_fault mm/memory.c:4579 [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+0x1952/0x26b0 mm/memory.c:5219 do_user_addr_fault+0x69b/0xcb0 arch/x86/mm/fault.c:1428 handle_page_fault arch/x86/mm/fault.c:1519 [inline] exc_page_fault+0x7a/0x110 arch/x86/mm/fault.c:1575 asm_exc_page_fault+0x22/0x30 arch/x86/include/asm/idtentry.h:570 RIP: 0010:copy_user_short_string+0x24/0x40 arch/x86/lib/copy_user_64.S:243 Code: 1f 80 00 00 00 00 89 d1 83 e2 07 c1 e9 03 74 12 4c 8b 06 4c 89 07 48 8d 76 08 48 8d 7f 08 ff c9 75 ee 21 d2 74 10 89 d1 8a 06 <88> 07 48 ff c6 48 ff c7 ff c9 75 f2 31 c0 0f 01 ca c3 8d 14 ca eb RSP: 0018:ffffc9000349f8d8 EFLAGS: 00050202 RAX: ffffffff843c1585 RBX: ffff88804bbaa000 RCX: 0000000000000001 RDX: 0000000000000001 RSI: ffff88804bbaa000 RDI: 0000000020000a80 RBP: ffffc9000349fa30 R08: dffffc0000000000 R09: ffffed1009775401 R10: ffffed1009775401 R11: 1ffff11009775400 R12: 0000000000000001 R13: 1ffff92000693fb7 R14: 0000000020000a80 R15: dffffc0000000000 copy_user_generic arch/x86/include/asm/uaccess_64.h:37 [inline] raw_copy_to_user arch/x86/include/asm/uaccess_64.h:58 [inline] copyout lib/iov_iter.c:170 [inline] _copy_to_iter+0x2e1/0x1020 lib/iov_iter.c:529 copy_page_to_iter+0xf0/0x250 lib/iov_iter.c:727 copy_folio_to_iter include/linux/uio.h:172 [inline] filemap_read+0x790/0xea0 mm/filemap.c:2745 f2fs_file_read_iter+0x139/0xc00 fs/f2fs/file.c:4374 call_read_iter include/linux/fs.h:2183 [inline] new_sync_read fs/read_write.c:389 [inline] vfs_read+0x7ac/0xbf0 fs/read_write.c:470 ksys_read+0x177/0x2a0 fs/read_write.c:613 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x3d/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x63/0xcd RIP: 0033:0x7f3bca48c0c9 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:00007f3bcb1d8168 EFLAGS: 00000246 ORIG_RAX: 0000000000000000 RAX: ffffffffffffffda RBX: 00007f3bca5abf80 RCX: 00007f3bca48c0c9 RDX: 0000000000002020 RSI: 0000000020000a80 RDI: 0000000000000005 RBP: 00007f3bca4e7ae9 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007ffdb9fc797f R14: 00007f3bcb1d8300 R15: 0000000000022000 syz-executor.3: attempt to access beyond end of device loop3: rw=10241, sector=45096, nr_sectors = 8 limit=40427 ---------------- Code disassembly (best guess), 1 bytes skipped: 0: 80 00 00 addb $0x0,(%rax) 3: 00 00 add %al,(%rax) 5: 89 d1 mov %edx,%ecx 7: 83 e2 07 and $0x7,%edx a: c1 e9 03 shr $0x3,%ecx d: 74 12 je 0x21 f: 4c 8b 06 mov (%rsi),%r8 12: 4c 89 07 mov %r8,(%rdi) 15: 48 8d 76 08 lea 0x8(%rsi),%rsi 19: 48 8d 7f 08 lea 0x8(%rdi),%rdi 1d: ff c9 dec %ecx 1f: 75 ee jne 0xf 21: 21 d2 and %edx,%edx 23: 74 10 je 0x35 25: 89 d1 mov %edx,%ecx 27: 8a 06 mov (%rsi),%al * 29: 88 07 mov %al,(%rdi) <-- trapping instruction 2b: 48 ff c6 inc %rsi 2e: 48 ff c7 inc %rdi 31: ff c9 dec %ecx 33: 75 f2 jne 0x27 35: 31 c0 xor %eax,%eax 37: 0f 01 ca clac 3a: c3 retq 3b: 8d 14 ca lea (%rdx,%rcx,8),%edx 3e: eb .byte 0xeb