====================================================== WARNING: possible circular locking dependency detected 6.2.0-rc8-syzkaller-00027-g033c40a89f55 #0 Not tainted ------------------------------------------------------ syz-executor.0/18615 is trying to acquire lock: ffff888073b9ca70 (mapping.invalidate_lock#8){++++}-{3:3}, at: filemap_invalidate_lock_shared include/linux/fs.h:811 [inline] ffff888073b9ca70 (mapping.invalidate_lock#8){++++}-{3:3}, at: f2fs_vm_page_mkwrite+0x547/0x1440 fs/f2fs/file.c:104 but task is already holding lock: ffff88802a588558 (sb_pagefaults#6){.+.+}-{0:0}, at: sb_start_pagefault include/linux/fs.h:1918 [inline] ffff88802a588558 (sb_pagefaults#6){.+.+}-{0:0}, at: f2fs_vm_page_mkwrite+0x47b/0x1440 fs/f2fs/file.c:99 which lock already depends on the new lock. the existing dependency chain (in reverse order) is: -> #6 (sb_pagefaults#6){.+.+}-{0:0}: lock_acquire+0x235/0x630 kernel/locking/lockdep.c:5668 percpu_down_read include/linux/percpu-rwsem.h:51 [inline] __sb_start_write+0x58/0x1a0 include/linux/fs.h:1814 sb_start_pagefault include/linux/fs.h:1918 [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 -> #5 (&mm->mmap_lock){++++}-{3:3}: lock_acquire+0x235/0x630 kernel/locking/lockdep.c:5668 __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+0xaf1d/0xb500 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 -> #4 (&sbi->sb_lock){++++}-{3:3}: lock_acquire+0x235/0x630 kernel/locking/lockdep.c:5668 down_write+0x3a/0x60 kernel/locking/rwsem.c:1562 f2fs_down_write fs/f2fs/f2fs.h:2213 [inline] f2fs_handle_error+0xef/0x240 fs/f2fs/super.c:3926 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+0x53bf/0x7c80 fs/f2fs/super.c:4328 mount_bdev+0x271/0x3a0 fs/super.c:1359 legacy_get_tree+0xef/0x190 fs/fs_context.c:610 vfs_get_tree+0x8c/0x270 fs/super.c:1489 do_new_mount+0x28f/0xae0 fs/namespace.c:3145 do_mount fs/namespace.c:3488 [inline] __do_sys_mount fs/namespace.c:3697 [inline] __se_sys_mount+0x2d9/0x3c0 fs/namespace.c:3674 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 (&array[i].journal_rwsem){++++}-{3:3}: lock_acquire+0x235/0x630 kernel/locking/lockdep.c:5668 down_read+0x3d/0x50 kernel/locking/rwsem.c:1509 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+0x53fd/0x7c80 fs/f2fs/super.c:4334 mount_bdev+0x271/0x3a0 fs/super.c:1359 legacy_get_tree+0xef/0x190 fs/fs_context.c:610 vfs_get_tree+0x8c/0x270 fs/super.c:1489 do_new_mount+0x28f/0xae0 fs/namespace.c:3145 do_mount fs/namespace.c:3488 [inline] __do_sys_mount fs/namespace.c:3697 [inline] __se_sys_mount+0x2d9/0x3c0 fs/namespace.c:3674 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 (&nm_i->nat_tree_lock){++++}-{3:3}: lock_acquire+0x235/0x630 kernel/locking/lockdep.c:5668 down_read+0x3d/0x50 kernel/locking/rwsem.c:1509 f2fs_down_read fs/f2fs/f2fs.h:2188 [inline] f2fs_get_node_info+0xf3/0x12d0 fs/f2fs/node.c:564 f2fs_new_node_page+0x26a/0xb60 fs/f2fs/node.c:1295 f2fs_get_dnode_of_data+0x73f/0x1e40 fs/f2fs/node.c:810 f2fs_reserve_block+0x54/0x250 fs/f2fs/data.c:1199 f2fs_get_new_data_page+0x186/0x770 fs/f2fs/data.c:1387 f2fs_add_regular_entry+0x64b/0xe10 fs/f2fs/dir.c:754 f2fs_add_dentry fs/f2fs/dir.c:816 [inline] f2fs_do_add_link+0x2c6/0x4e0 fs/f2fs/dir.c:855 f2fs_add_link fs/f2fs/f2fs.h:3564 [inline] f2fs_create+0x32c/0x530 fs/f2fs/namei.c:363 lookup_open fs/namei.c:3413 [inline] open_last_lookups fs/namei.c:3481 [inline] path_openat+0x12cb/0x2e40 fs/namei.c:3711 do_filp_open+0x234/0x490 fs/namei.c:3741 do_sys_openat2+0x13f/0x500 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+0x225/0x270 fs/open.c:1330 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 -> #1 (&sbi->cp_rwsem){++++}-{3:3}: lock_acquire+0x235/0x630 kernel/locking/lockdep.c:5668 down_read+0x3d/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_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+0xb59/0x1110 fs/f2fs/file.c:1010 notify_change+0xdd1/0x1080 fs/attr.c:482 do_truncate+0x220/0x300 fs/open.c:65 handle_truncate fs/namei.c:3216 [inline] do_open fs/namei.c:3561 [inline] path_openat+0x27a1/0x2e40 fs/namei.c:3714 do_filp_open+0x234/0x490 fs/namei.c:3741 do_sys_openat2+0x13f/0x500 fs/open.c:1310 do_sys_open fs/open.c:1326 [inline] __do_sys_creat fs/open.c:1402 [inline] __se_sys_creat fs/open.c:1396 [inline] __x64_sys_creat+0x123/0x160 fs/open.c:1396 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 -> #0 (mapping.invalidate_lock#8){++++}-{3:3}: check_prev_add kernel/locking/lockdep.c:3097 [inline] check_prevs_add kernel/locking/lockdep.c:3216 [inline] validate_chain+0x166b/0x58e0 kernel/locking/lockdep.c:3831 __lock_acquire+0x125b/0x1f80 kernel/locking/lockdep.c:5055 lock_acquire+0x235/0x630 kernel/locking/lockdep.c:5668 down_read+0x3d/0x50 kernel/locking/rwsem.c:1509 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 other info that might help us debug this: Chain exists of: mapping.invalidate_lock#8 --> &mm->mmap_lock --> sb_pagefaults#6 Possible unsafe locking scenario: CPU0 CPU1 ---- ---- lock(sb_pagefaults#6); lock(&mm->mmap_lock); lock(sb_pagefaults#6); lock(mapping.invalidate_lock#8); *** DEADLOCK *** 2 locks held by syz-executor.0/18615: #0: ffff88802ac92458 (&mm->mmap_lock){++++}-{3:3}, at: mmap_read_lock include/linux/mmap_lock.h:117 [inline] #0: ffff88802ac92458 (&mm->mmap_lock){++++}-{3:3}, at: do_user_addr_fault arch/x86/mm/fault.c:1379 [inline] #0: ffff88802ac92458 (&mm->mmap_lock){++++}-{3:3}, at: handle_page_fault arch/x86/mm/fault.c:1519 [inline] #0: ffff88802ac92458 (&mm->mmap_lock){++++}-{3:3}, at: exc_page_fault+0x546/0x880 arch/x86/mm/fault.c:1575 #1: ffff88802a588558 (sb_pagefaults#6){.+.+}-{0:0}, at: sb_start_pagefault include/linux/fs.h:1918 [inline] #1: ffff88802a588558 (sb_pagefaults#6){.+.+}-{0:0}, at: f2fs_vm_page_mkwrite+0x47b/0x1440 fs/f2fs/file.c:99 stack backtrace: CPU: 0 PID: 18615 Comm: syz-executor.0 Not tainted 6.2.0-rc8-syzkaller-00027-g033c40a89f55 #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:2177 check_prev_add kernel/locking/lockdep.c:3097 [inline] check_prevs_add kernel/locking/lockdep.c:3216 [inline] validate_chain+0x166b/0x58e0 kernel/locking/lockdep.c:3831 __lock_acquire+0x125b/0x1f80 kernel/locking/lockdep.c:5055 lock_acquire+0x235/0x630 kernel/locking/lockdep.c:5668 down_read+0x3d/0x50 kernel/locking/rwsem.c:1509 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 RIP: 0033:0x7f8170486c3b Code: 0f 74 12 4c 8d 0c 16 4c 39 cf 0f 82 63 01 00 00 48 89 d1 f3 a4 c3 80 fa 08 73 12 80 fa 04 73 1e 80 fa 01 77 26 72 05 0f b6 0e <88> 0f c3 48 8b 4c 16 f8 48 8b 36 48 89 4c 17 f8 48 89 37 c3 8b 4c RSP: 002b:00007ffdffd63578 EFLAGS: 00010246 RAX: 0000000020008240 RBX: 0000000000000000 RCX: 00000000000000eb RDX: 0000000000000001 RSI: 00007f8170008228 RDI: 0000000020008240 RBP: 00007ffdffd63638 R08: 00007f8170400000 R09: 00007f8170000000 R10: 00007f8170008210 R11: 0000000000000246 R12: 00000000000b01a1 R13: 00007ffdffd63660 R14: 00007f81705abf80 R15: 0000000000000032