====================================================== WARNING: possible circular locking dependency detected 6.1.0-rc8-syzkaller-33330-ga5541c0811a0 #0 Not tainted ------------------------------------------------------ syz-executor.1/7890 is trying to acquire lock: ffff00010ee6c3b0 (&sbi->cp_rwsem){++++}-{3:3}, at: f2fs_down_read fs/f2fs/f2fs.h:2180 [inline] ffff00010ee6c3b0 (&sbi->cp_rwsem){++++}-{3:3}, at: f2fs_lock_op fs/f2fs/f2fs.h:2223 [inline] ffff00010ee6c3b0 (&sbi->cp_rwsem){++++}-{3:3}, at: f2fs_convert_inline_inode+0x1e8/0x2e4 fs/f2fs/inline.c:219 but task is already holding lock: ffff0001165e0688 (&mm->mmap_lock){++++}-{3:3}, at: mmap_read_trylock include/linux/mmap_lock.h:136 [inline] ffff0001165e0688 (&mm->mmap_lock){++++}-{3:3}, at: do_page_fault+0x1ec/0x79c arch/arm64/mm/fault.c:589 which lock already depends on the new lock. the existing dependency chain (in reverse order) is: -> #4 (&mm->mmap_lock){++++}-{3:3}: __might_fault+0x7c/0xb4 mm/memory.c:5645 _copy_to_user include/linux/uaccess.h:143 [inline] copy_to_user include/linux/uaccess.h:169 [inline] f2fs_ioc_get_encryption_pwsalt fs/f2fs/file.c:2349 [inline] __f2fs_ioctl+0x3204/0x3318 fs/f2fs/file.c:4151 f2fs_ioctl+0x74/0xbc 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] __arm64_sys_ioctl+0xd0/0x140 fs/ioctl.c:856 __invoke_syscall arch/arm64/kernel/syscall.c:38 [inline] invoke_syscall arch/arm64/kernel/syscall.c:52 [inline] el0_svc_common+0x138/0x220 arch/arm64/kernel/syscall.c:142 do_el0_svc+0x48/0x140 arch/arm64/kernel/syscall.c:197 el0_svc+0x58/0x150 arch/arm64/kernel/entry-common.c:637 el0t_64_sync_handler+0x84/0xf0 arch/arm64/kernel/entry-common.c:655 el0t_64_sync+0x190/0x194 arch/arm64/kernel/entry.S:584 -> #3 (&sbi->sb_lock){++++}-{3:3}: down_write+0x5c/0x88 kernel/locking/rwsem.c:1562 f2fs_down_write fs/f2fs/f2fs.h:2205 [inline] f2fs_handle_error+0x9c/0x17c fs/f2fs/super.c:3898 build_sit_entries+0x8ec/0x9b8 f2fs_build_segment_manager+0x354/0x408 fs/f2fs/segment.c:5123 f2fs_fill_super+0x1438/0x1e90 fs/f2fs/super.c:4300 mount_bdev+0x1b8/0x210 fs/super.c:1401 f2fs_mount+0x44/0x58 fs/f2fs/super.c:4580 legacy_get_tree+0x30/0x74 fs/fs_context.c:610 vfs_get_tree+0x40/0x140 fs/super.c:1531 do_new_mount+0x1dc/0x4e4 fs/namespace.c:3040 path_mount+0x358/0x890 fs/namespace.c:3370 do_mount fs/namespace.c:3383 [inline] __do_sys_mount fs/namespace.c:3591 [inline] __se_sys_mount fs/namespace.c:3568 [inline] __arm64_sys_mount+0x2c4/0x3c4 fs/namespace.c:3568 __invoke_syscall arch/arm64/kernel/syscall.c:38 [inline] invoke_syscall arch/arm64/kernel/syscall.c:52 [inline] el0_svc_common+0x138/0x220 arch/arm64/kernel/syscall.c:142 do_el0_svc+0x48/0x140 arch/arm64/kernel/syscall.c:197 el0_svc+0x58/0x150 arch/arm64/kernel/entry-common.c:637 el0t_64_sync_handler+0x84/0xf0 arch/arm64/kernel/entry-common.c:655 el0t_64_sync+0x190/0x194 arch/arm64/kernel/entry.S:584 -> #2 (&array[i].journal_rwsem){++++}-{3:3}: down_read+0x5c/0x78 kernel/locking/rwsem.c:1509 scan_curseg_cache fs/f2fs/node.c:2401 [inline] __f2fs_build_free_nids fs/f2fs/node.c:2513 [inline] f2fs_build_free_nids+0x798/0x8f4 fs/f2fs/node.c:2528 f2fs_build_node_manager+0x624/0x64c fs/f2fs/node.c:3313 f2fs_fill_super+0x1470/0x1e90 fs/f2fs/super.c:4306 mount_bdev+0x1b8/0x210 fs/super.c:1401 f2fs_mount+0x44/0x58 fs/f2fs/super.c:4580 legacy_get_tree+0x30/0x74 fs/fs_context.c:610 vfs_get_tree+0x40/0x140 fs/super.c:1531 do_new_mount+0x1dc/0x4e4 fs/namespace.c:3040 path_mount+0x358/0x890 fs/namespace.c:3370 do_mount fs/namespace.c:3383 [inline] __do_sys_mount fs/namespace.c:3591 [inline] __se_sys_mount fs/namespace.c:3568 [inline] __arm64_sys_mount+0x2c4/0x3c4 fs/namespace.c:3568 __invoke_syscall arch/arm64/kernel/syscall.c:38 [inline] invoke_syscall arch/arm64/kernel/syscall.c:52 [inline] el0_svc_common+0x138/0x220 arch/arm64/kernel/syscall.c:142 do_el0_svc+0x48/0x140 arch/arm64/kernel/syscall.c:197 el0_svc+0x58/0x150 arch/arm64/kernel/entry-common.c:637 el0t_64_sync_handler+0x84/0xf0 arch/arm64/kernel/entry-common.c:655 el0t_64_sync+0x190/0x194 arch/arm64/kernel/entry.S:584 -> #1 (&nm_i->nat_tree_lock){++++}-{3:3}: down_read+0x5c/0x78 kernel/locking/rwsem.c:1509 f2fs_down_read fs/f2fs/f2fs.h:2180 [inline] f2fs_get_node_info+0x74/0x458 fs/f2fs/node.c:560 truncate_node+0x58/0x1cc fs/f2fs/node.c:892 f2fs_remove_inode_page+0x1c4/0x288 fs/f2fs/node.c:1254 f2fs_evict_inode+0x348/0x978 fs/f2fs/inode.c:813 evict+0xec/0x334 fs/inode.c:664 iput_final fs/inode.c:1747 [inline] iput+0x2c4/0x324 fs/inode.c:1773 dentry_unlink_inode+0x204/0x21c fs/dcache.c:401 __dentry_kill+0x15c/0x37c fs/dcache.c:607 dentry_kill+0x8c/0x194 dput+0x194/0x2e0 fs/dcache.c:913 do_renameat2+0x49c/0x758 fs/namei.c:4932 __do_sys_renameat2 fs/namei.c:4963 [inline] __se_sys_renameat2 fs/namei.c:4960 [inline] __arm64_sys_renameat2+0x6c/0x88 fs/namei.c:4960 __invoke_syscall arch/arm64/kernel/syscall.c:38 [inline] invoke_syscall arch/arm64/kernel/syscall.c:52 [inline] el0_svc_common+0x138/0x220 arch/arm64/kernel/syscall.c:142 do_el0_svc+0x48/0x140 arch/arm64/kernel/syscall.c:197 el0_svc+0x58/0x150 arch/arm64/kernel/entry-common.c:637 el0t_64_sync_handler+0x84/0xf0 arch/arm64/kernel/entry-common.c:655 el0t_64_sync+0x190/0x194 arch/arm64/kernel/entry.S:584 -> #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+0x1530/0x3084 kernel/locking/lockdep.c:5055 lock_acquire+0x100/0x1f8 kernel/locking/lockdep.c:5668 down_read+0x5c/0x78 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+0x1e8/0x2e4 fs/f2fs/inline.c:219 f2fs_vm_page_mkwrite+0xb4/0x9a4 fs/f2fs/file.c:79 do_page_mkwrite+0x74/0x288 mm/memory.c:2977 wp_page_shared+0x8c/0x364 mm/memory.c:3323 do_wp_page+0x794/0xd10 mm/memory.c:3473 handle_pte_fault mm/memory.c:4972 [inline] __handle_mm_fault mm/memory.c:5096 [inline] handle_mm_fault+0x880/0xa48 mm/memory.c:5217 __do_page_fault arch/arm64/mm/fault.c:508 [inline] do_page_fault+0x428/0x79c arch/arm64/mm/fault.c:608 do_mem_abort+0x54/0x130 arch/arm64/mm/fault.c:827 el0_da+0x70/0x16c arch/arm64/kernel/entry-common.c:515 el0t_64_sync_handler+0xcc/0xf0 arch/arm64/kernel/entry-common.c:658 el0t_64_sync+0x190/0x194 arch/arm64/kernel/entry.S:584 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 *** 1 lock held by syz-executor.1/7890: #0: ffff0001165e0688 (&mm->mmap_lock){++++}-{3:3}, at: mmap_read_trylock include/linux/mmap_lock.h:136 [inline] #0: ffff0001165e0688 (&mm->mmap_lock){++++}-{3:3}, at: do_page_fault+0x1ec/0x79c arch/arm64/mm/fault.c:589 stack backtrace: CPU: 0 PID: 7890 Comm: syz-executor.1 Not tainted 6.1.0-rc8-syzkaller-33330-ga5541c0811a0 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/26/2022 Call trace: dump_backtrace+0x1c4/0x1f0 arch/arm64/kernel/stacktrace.c:156 show_stack+0x2c/0x3c arch/arm64/kernel/stacktrace.c:163 __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0x104/0x16c lib/dump_stack.c:106 dump_stack+0x1c/0x58 lib/dump_stack.c:113 print_circular_bug+0x2c4/0x2c8 kernel/locking/lockdep.c:2055 check_noncircular+0x14c/0x154 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+0x1530/0x3084 kernel/locking/lockdep.c:5055 lock_acquire+0x100/0x1f8 kernel/locking/lockdep.c:5668 down_read+0x5c/0x78 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+0x1e8/0x2e4 fs/f2fs/inline.c:219 f2fs_vm_page_mkwrite+0xb4/0x9a4 fs/f2fs/file.c:79 do_page_mkwrite+0x74/0x288 mm/memory.c:2977 wp_page_shared+0x8c/0x364 mm/memory.c:3323 do_wp_page+0x794/0xd10 mm/memory.c:3473 handle_pte_fault mm/memory.c:4972 [inline] __handle_mm_fault mm/memory.c:5096 [inline] handle_mm_fault+0x880/0xa48 mm/memory.c:5217 __do_page_fault arch/arm64/mm/fault.c:508 [inline] do_page_fault+0x428/0x79c arch/arm64/mm/fault.c:608 do_mem_abort+0x54/0x130 arch/arm64/mm/fault.c:827 el0_da+0x70/0x16c arch/arm64/kernel/entry-common.c:515 el0t_64_sync_handler+0xcc/0xf0 arch/arm64/kernel/entry-common.c:658 el0t_64_sync+0x190/0x194 arch/arm64/kernel/entry.S:584