====================================================== WARNING: possible circular locking dependency detected 6.1.0-syzkaller-03225-g764822972d64 #0 Not tainted ------------------------------------------------------ syz-executor.2/12276 is trying to acquire lock: ffff888022de03b0 (&sbi->cp_rwsem){++++}-{3:3}, at: f2fs_down_read fs/f2fs/f2fs.h:2180 [inline] ffff888022de03b0 (&sbi->cp_rwsem){++++}-{3:3}, at: f2fs_lock_op fs/f2fs/f2fs.h:2223 [inline] ffff888022de03b0 (&sbi->cp_rwsem){++++}-{3:3}, at: f2fs_convert_inline_inode+0x481/0x8f0 fs/f2fs/inline.c:219 but task is already holding lock: ffff88801c84e6d8 (&mm->mmap_lock#2){++++}-{3:3}, at: mmap_read_trylock include/linux/mmap_lock.h:136 [inline] ffff88801c84e6d8 (&mm->mmap_lock#2){++++}-{3:3}, at: do_user_addr_fault+0x276/0x1210 arch/x86/mm/fault.c:1369 which lock already depends on the new lock. the existing dependency chain (in reverse order) is: -> #4 (&mm->mmap_lock#2){++++}-{3:3}: __might_fault mm/memory.c:5645 [inline] __might_fault+0x10c/0x180 mm/memory.c:5638 _copy_to_user+0x29/0x150 lib/usercopy.c:29 copy_to_user include/linux/uaccess.h:169 [inline] f2fs_ioc_get_encryption_pwsalt+0x2b2/0x370 fs/f2fs/file.c:2349 __f2fs_ioctl+0x1755/0xa7c0 fs/f2fs/file.c:4151 f2fs_ioctl+0x18e/0x220 fs/f2fs/file.c:4224 vfs_ioctl fs/ioctl.c:51 [inline] __do_sys_ioctl fs/ioctl.c:870 [inline] __se_sys_ioctl fs/ioctl.c:856 [inline] __x64_sys_ioctl+0x197/0x210 fs/ioctl.c:856 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x39/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x63/0xcd -> #3 (&sbi->sb_lock){++++}-{3:3}: down_write+0x94/0x220 kernel/locking/rwsem.c:1562 f2fs_down_write fs/f2fs/f2fs.h:2205 [inline] f2fs_handle_error+0x8e/0x200 fs/f2fs/super.c:3898 check_block_count+0x440/0x4f0 fs/f2fs/segment.h:771 build_sit_entries fs/f2fs/segment.c:4432 [inline] f2fs_build_segment_manager+0x5a30/0xa670 fs/f2fs/segment.c:5123 f2fs_fill_super+0x3a73/0x77a0 fs/f2fs/super.c:4300 mount_bdev+0x351/0x410 fs/super.c:1359 legacy_get_tree+0x109/0x220 fs/fs_context.c:610 vfs_get_tree+0x8d/0x2f0 fs/super.c:1489 do_new_mount fs/namespace.c:3145 [inline] path_mount+0x132a/0x1e20 fs/namespace.c:3475 do_mount fs/namespace.c:3488 [inline] __do_sys_mount fs/namespace.c:3697 [inline] __se_sys_mount fs/namespace.c:3674 [inline] __x64_sys_mount+0x283/0x300 fs/namespace.c:3674 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x39/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x63/0xcd -> #2 (&array[i].journal_rwsem){++++}-{3:3}: down_read+0x9c/0x450 kernel/locking/rwsem.c:1509 scan_curseg_cache+0xa7/0x3b0 fs/f2fs/node.c:2401 __f2fs_build_free_nids+0x761/0xe10 fs/f2fs/node.c:2513 f2fs_build_free_nids fs/f2fs/node.c:2528 [inline] f2fs_build_node_manager+0x2007/0x2fb0 fs/f2fs/node.c:3313 f2fs_fill_super+0x3a95/0x77a0 fs/f2fs/super.c:4306 mount_bdev+0x351/0x410 fs/super.c:1359 legacy_get_tree+0x109/0x220 fs/fs_context.c:610 vfs_get_tree+0x8d/0x2f0 fs/super.c:1489 do_new_mount fs/namespace.c:3145 [inline] path_mount+0x132a/0x1e20 fs/namespace.c:3475 do_mount fs/namespace.c:3488 [inline] __do_sys_mount fs/namespace.c:3697 [inline] __se_sys_mount fs/namespace.c:3674 [inline] __x64_sys_mount+0x283/0x300 fs/namespace.c:3674 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x39/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x63/0xcd -> #1 (&nm_i->nat_tree_lock){++++}-{3:3}: down_read+0x9c/0x450 kernel/locking/rwsem.c:1509 f2fs_down_read fs/f2fs/f2fs.h:2180 [inline] f2fs_get_node_info+0x1ac/0x1070 fs/f2fs/node.c:560 __allocate_data_block+0x180/0xbf0 fs/f2fs/data.c:1425 f2fs_map_blocks+0x1505/0x3600 fs/f2fs/data.c:1608 f2fs_preallocate_blocks fs/f2fs/file.c:4451 [inline] f2fs_file_write_iter+0x10f0/0x3160 fs/f2fs/file.c:4654 call_write_iter include/linux/fs.h:2186 [inline] do_iter_readv_writev+0x20b/0x3b0 fs/read_write.c:735 do_iter_write+0x182/0x700 fs/read_write.c:861 vfs_iter_write+0x74/0xa0 fs/read_write.c:902 iter_file_splice_write+0x745/0xc90 fs/splice.c:686 do_splice_from fs/splice.c:764 [inline] direct_splice_actor+0x114/0x180 fs/splice.c:931 splice_direct_to_actor+0x335/0x8a0 fs/splice.c:886 do_splice_direct+0x1ab/0x280 fs/splice.c:974 do_sendfile+0xb19/0x1270 fs/read_write.c:1255 __do_sys_sendfile64 fs/read_write.c:1323 [inline] __se_sys_sendfile64 fs/read_write.c:1309 [inline] __x64_sys_sendfile64+0x1d0/0x210 fs/read_write.c:1309 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x39/0xb0 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 kernel/locking/lockdep.c:3831 [inline] __lock_acquire+0x2a43/0x56d0 kernel/locking/lockdep.c:5055 lock_acquire kernel/locking/lockdep.c:5668 [inline] lock_acquire+0x1e3/0x630 kernel/locking/lockdep.c:5633 down_read+0x9c/0x450 kernel/locking/rwsem.c:1509 f2fs_down_read fs/f2fs/f2fs.h:2180 [inline] f2fs_lock_op fs/f2fs/f2fs.h:2223 [inline] f2fs_convert_inline_inode+0x481/0x8f0 fs/f2fs/inline.c:219 f2fs_vm_page_mkwrite+0x308/0x1c90 fs/f2fs/file.c:79 do_page_mkwrite+0x19b/0x680 mm/memory.c:2977 do_shared_fault mm/memory.c:4618 [inline] do_fault mm/memory.c:4686 [inline] handle_pte_fault mm/memory.c:4954 [inline] __handle_mm_fault+0x2280/0x3a40 mm/memory.c:5096 handle_mm_fault+0x1cc/0x780 mm/memory.c:5217 do_user_addr_fault+0x475/0x1210 arch/x86/mm/fault.c:1428 handle_page_fault arch/x86/mm/fault.c:1519 [inline] exc_page_fault+0x98/0x170 arch/x86/mm/fault.c:1575 asm_exc_page_fault+0x26/0x30 arch/x86/include/asm/idtentry.h:570 other info that might help us debug this: Chain exists of: &sbi->cp_rwsem --> &sbi->sb_lock --> &mm->mmap_lock#2 Possible unsafe locking scenario: CPU0 CPU1 ---- ---- lock(&mm->mmap_lock#2); lock(&sbi->sb_lock); lock(&mm->mmap_lock#2); lock(&sbi->cp_rwsem); *** DEADLOCK *** 1 lock held by syz-executor.2/12276: #0: ffff88801c84e6d8 (&mm->mmap_lock#2){++++}-{3:3}, at: mmap_read_trylock include/linux/mmap_lock.h:136 [inline] #0: ffff88801c84e6d8 (&mm->mmap_lock#2){++++}-{3:3}, at: do_user_addr_fault+0x276/0x1210 arch/x86/mm/fault.c:1369 stack backtrace: CPU: 1 PID: 12276 Comm: syz-executor.2 Not tainted 6.1.0-syzkaller-03225-g764822972d64 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/26/2022 Call Trace: __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0xd1/0x138 lib/dump_stack.c:106 check_noncircular+0x25f/0x2e0 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 kernel/locking/lockdep.c:3831 [inline] __lock_acquire+0x2a43/0x56d0 kernel/locking/lockdep.c:5055 lock_acquire kernel/locking/lockdep.c:5668 [inline] lock_acquire+0x1e3/0x630 kernel/locking/lockdep.c:5633 down_read+0x9c/0x450 kernel/locking/rwsem.c:1509 f2fs_down_read fs/f2fs/f2fs.h:2180 [inline] f2fs_lock_op fs/f2fs/f2fs.h:2223 [inline] f2fs_convert_inline_inode+0x481/0x8f0 fs/f2fs/inline.c:219 f2fs_vm_page_mkwrite+0x308/0x1c90 fs/f2fs/file.c:79 do_page_mkwrite+0x19b/0x680 mm/memory.c:2977 do_shared_fault mm/memory.c:4618 [inline] do_fault mm/memory.c:4686 [inline] handle_pte_fault mm/memory.c:4954 [inline] __handle_mm_fault+0x2280/0x3a40 mm/memory.c:5096 handle_mm_fault+0x1cc/0x780 mm/memory.c:5217 do_user_addr_fault+0x475/0x1210 arch/x86/mm/fault.c:1428 handle_page_fault arch/x86/mm/fault.c:1519 [inline] exc_page_fault+0x98/0x170 arch/x86/mm/fault.c:1575 asm_exc_page_fault+0x26/0x30 arch/x86/include/asm/idtentry.h:570 RIP: 0033:0x7f9fd622bd79 Code: 48 8b 04 24 48 85 c0 74 17 48 8b 54 24 18 48 0f ca 48 89 54 24 18 48 83 f8 01 0f 85 9b 02 00 00 48 8b 44 24 10 48 8b 54 24 18 <48> 89 10 e9 c2 fd ff ff 48 8b 44 24 10 0f b7 10 48 8b 04 24 48 85 RSP: 002b:00007fff19a9e770 EFLAGS: 00010246 RAX: 00000000200002c0 RBX: 0000000000000000 RCX: 0000000000000000 RDX: 0000000020000100 RSI: 0000000000000000 RDI: 000055555586e2e8 RBP: 00007fff19a9e868 R08: 0000000000000000 R09: 0000000000000000 R10: 00007f9fd5e10898 R11: 0000000000000246 R12: 00000000001aa76f R13: 00007fff19a9e890 R14: 00007f9fd63abf80 R15: 0000000000000032