====================================================== WARNING: possible circular locking dependency detected 6.2.0-rc5-syzkaller-00108-g83abd4d4c4be #0 Not tainted ------------------------------------------------------ syz-executor.5/14493 is trying to acquire lock: ffff888034321dc0 (mapping.invalidate_lock#4){++++}-{3:3}, at: filemap_invalidate_lock_shared include/linux/fs.h:811 [inline] ffff888034321dc0 (mapping.invalidate_lock#4){++++}-{3:3}, at: f2fs_vm_page_mkwrite+0x4f6/0x1350 fs/f2fs/file.c:104 but task is already holding lock: ffff88802431c558 (sb_pagefaults#5){.+.+}-{0:0}, at: sb_start_pagefault include/linux/fs.h:1918 [inline] ffff88802431c558 (sb_pagefaults#5){.+.+}-{0:0}, at: f2fs_vm_page_mkwrite+0x430/0x1350 fs/f2fs/file.c:99 which lock already depends on the new lock. the existing dependency chain (in reverse order) is: -> #4 (sb_pagefaults#5){.+.+}-{0:0}: lock_acquire+0x182/0x3c0 kernel/locking/lockdep.c:5668 percpu_down_read include/linux/percpu-rwsem.h:51 [inline] __sb_start_write+0x5c/0x1b0 include/linux/fs.h:1814 sb_start_pagefault include/linux/fs.h:1918 [inline] f2fs_vm_page_mkwrite+0x430/0x1350 fs/f2fs/file.c:99 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 -> #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 f2fs_new_node_page+0xa64/0xea0 fs/f2fs/node.c:1303 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 -> #1 (&sbi->cp_rwsem){++++}-{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_lock_op fs/f2fs/f2fs.h:2231 [inline] f2fs_do_truncate_blocks+0x12a/0x740 fs/f2fs/file.c:688 f2fs_truncate_blocks+0x10b/0x300 fs/f2fs/file.c:751 f2fs_truncate+0x363/0x5b0 fs/f2fs/file.c:803 f2fs_setattr+0xb5b/0x1120 fs/f2fs/file.c:1010 notify_change+0xe50/0x1100 fs/attr.c:482 do_truncate+0x200/0x2f0 fs/open.c:65 handle_truncate fs/namei.c:3216 [inline] do_open fs/namei.c:3561 [inline] path_openat+0x272b/0x2dd0 fs/namei.c:3714 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_creat fs/open.c:1402 [inline] __se_sys_creat fs/open.c:1396 [inline] __x64_sys_creat+0x11f/0x160 fs/open.c:1396 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 (mapping.invalidate_lock#4){++++}-{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 filemap_invalidate_lock_shared include/linux/fs.h:811 [inline] f2fs_vm_page_mkwrite+0x4f6/0x1350 fs/f2fs/file.c:104 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 other info that might help us debug this: Chain exists of: mapping.invalidate_lock#4 --> &mm->mmap_lock --> sb_pagefaults#5 Possible unsafe locking scenario: CPU0 CPU1 ---- ---- lock(sb_pagefaults#5); lock(&mm->mmap_lock); lock(sb_pagefaults#5); lock(mapping.invalidate_lock#4); *** DEADLOCK *** 2 locks held by syz-executor.5/14493: #0: ffff88807e5a7318 (&mm->mmap_lock){++++}-{3:3}, at: mmap_read_lock+0x17/0x50 include/linux/mmap_lock.h:117 #1: ffff88802431c558 (sb_pagefaults#5){.+.+}-{0:0}, at: sb_start_pagefault include/linux/fs.h:1918 [inline] #1: ffff88802431c558 (sb_pagefaults#5){.+.+}-{0:0}, at: f2fs_vm_page_mkwrite+0x430/0x1350 fs/f2fs/file.c:99 stack backtrace: CPU: 1 PID: 14493 Comm: syz-executor.5 Not tainted 6.2.0-rc5-syzkaller-00108-g83abd4d4c4be #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 filemap_invalidate_lock_shared include/linux/fs.h:811 [inline] f2fs_vm_page_mkwrite+0x4f6/0x1350 fs/f2fs/file.c:104 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: 0033:0x7efea7c2bdca Code: c1 c0 08 0f b7 c0 48 8b 54 24 10 66 89 02 e9 60 fd ff ff 48 8b 04 24 48 85 c0 0f 85 6f fe ff ff 48 8b 44 24 10 0f b6 54 24 18 <88> 10 e9 42 fd ff ff 48 8b 54 24 08 48 8d 35 34 b0 0b 00 48 8d 3d RSP: 002b:00007ffd4af54780 EFLAGS: 00010246 RAX: 0000000020005700 RBX: 0000000000000000 RCX: 0000000000000000 RDX: 0000000000000005 RSI: 0000000000000000 RDI: 0000555556b732e8 RBP: 00007ffd4af54878 R08: 0000000000000000 R09: 0000000000000000 R10: 00007efea7805fe8 R11: 0000000000000000 R12: 0000000000000000 R13: 0000000000000001 R14: 00007efea7dabf80 R15: 0000000000000032