F2FS-fs (loop3): Mounted with checkpoint version = 48b305e5 fscrypt: AES-256-XTS using implementation "xts-aes-ce" ====================================================== WARNING: possible circular locking dependency detected 6.1.0-rc8-syzkaller-33330-ga5541c0811a0 #0 Not tainted ------------------------------------------------------ syz-executor.3/10134 is trying to acquire lock: ffff000112a67b08 (&mm->mmap_lock){++++}-{3:3}, at: __might_fault+0x54/0xb4 mm/memory.c:5644 but task is already holding lock: ffff00011074e088 (&sbi->sb_lock){++++}-{3:3}, at: f2fs_down_write fs/f2fs/f2fs.h:2205 [inline] ffff00011074e088 (&sbi->sb_lock){++++}-{3:3}, at: f2fs_ioc_get_encryption_pwsalt fs/f2fs/file.c:2334 [inline] ffff00011074e088 (&sbi->sb_lock){++++}-{3:3}, at: __f2fs_ioctl+0x1370/0x3318 fs/f2fs/file.c:4151 which lock already depends on the new lock. the existing dependency chain (in reverse order) is: -> #5 (&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 f2fs_check_nid_range fs/f2fs/node.c:39 [inline] add_free_nid+0x4d8/0x50c fs/f2fs/node.c:2282 scan_nat_page fs/f2fs/node.c:2384 [inline] __f2fs_build_free_nids fs/f2fs/node.c:2490 [inline] f2fs_build_free_nids+0x680/0x8f4 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 -> #4 (&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 f2fs_convert_inline_page+0x1a4/0x8ac fs/f2fs/inline.c:149 f2fs_convert_inline_inode+0x254/0x2e4 fs/f2fs/inline.c:230 f2fs_preallocate_blocks+0x1d4/0x2e8 fs/f2fs/file.c:4430 f2fs_file_write_iter+0x184/0x72c fs/f2fs/file.c:4654 do_iter_write+0x318/0x560 fs/read_write.c:861 vfs_iter_write+0x4c/0x6c fs/read_write.c:902 iter_file_splice_write+0x2a8/0x518 fs/splice.c:686 do_splice_from fs/splice.c:764 [inline] direct_splice_actor+0x4c/0xe0 fs/splice.c:931 splice_direct_to_actor+0x1dc/0x3e4 fs/splice.c:886 do_splice_direct+0xc4/0x14c fs/splice.c:974 do_sendfile+0x298/0x68c fs/read_write.c:1255 __do_sys_sendfile64 fs/read_write.c:1323 [inline] __se_sys_sendfile64 fs/read_write.c:1309 [inline] __arm64_sys_sendfile64+0xb0/0x230 fs/read_write.c:1309 __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->cp_rwsem){++++}-{3:3}: 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_do_truncate_blocks+0x98/0x384 fs/f2fs/file.c:687 f2fs_truncate_blocks+0x9c/0x1d8 fs/f2fs/file.c:750 f2fs_truncate+0x1b8/0x2a8 fs/f2fs/file.c:802 f2fs_setattr+0x5c8/0x788 fs/f2fs/file.c:1009 notify_change+0x758/0x7f0 fs/attr.c:420 do_truncate+0x108/0x150 fs/open.c:65 handle_truncate+0xf4/0x154 fs/namei.c:3216 do_open fs/namei.c:3561 [inline] path_openat+0xee0/0x11c4 fs/namei.c:3714 do_filp_open+0xdc/0x1b8 fs/namei.c:3741 do_sys_openat2+0xb8/0x22c fs/open.c:1310 do_sys_open fs/open.c:1326 [inline] __do_sys_openat fs/open.c:1342 [inline] __se_sys_openat fs/open.c:1337 [inline] __arm64_sys_openat+0xb0/0xe0 fs/open.c:1337 __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 (mapping.invalidate_lock#4){++++}-{3:3}: down_read+0x5c/0x78 kernel/locking/rwsem.c:1509 filemap_invalidate_lock_shared include/linux/fs.h:811 [inline] f2fs_vm_page_mkwrite+0x18c/0x9a4 fs/f2fs/file.c:104 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 -> #1 (sb_pagefaults#3){.+.+}-{0:0}: percpu_down_read include/linux/percpu-rwsem.h:51 [inline] __sb_start_write+0x84/0x1f4 include/linux/fs.h:1826 sb_start_pagefault include/linux/fs.h:1930 [inline] f2fs_vm_page_mkwrite+0x160/0x9a4 fs/f2fs/file.c:99 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 -> #0 (&mm->mmap_lock){++++}-{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 __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 other info that might help us debug this: Chain exists of: &mm->mmap_lock --> &nm_i->nat_tree_lock --> &sbi->sb_lock Possible unsafe locking scenario: CPU0 CPU1 ---- ---- lock(&sbi->sb_lock); lock(&nm_i->nat_tree_lock); lock(&sbi->sb_lock); lock(&mm->mmap_lock); *** DEADLOCK *** 2 locks held by syz-executor.3/10134: #0: ffff000115a78460 (sb_writers#22){.+.+}-{0:0}, at: mnt_want_write_file+0x28/0xd8 fs/namespace.c:437 #1: ffff00011074e088 (&sbi->sb_lock){++++}-{3:3}, at: f2fs_down_write fs/f2fs/f2fs.h:2205 [inline] #1: ffff00011074e088 (&sbi->sb_lock){++++}-{3:3}, at: f2fs_ioc_get_encryption_pwsalt fs/f2fs/file.c:2334 [inline] #1: ffff00011074e088 (&sbi->sb_lock){++++}-{3:3}, at: __f2fs_ioctl+0x1370/0x3318 fs/f2fs/file.c:4151 stack backtrace: CPU: 1 PID: 10134 Comm: syz-executor.3 Not tainted 6.1.0-rc8-syzkaller-33330-ga5541c0811a0 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/30/2022 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 __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