====================================================== WARNING: possible circular locking dependency detected 6.2.0-rc3-syzkaller-00060-gc757fc92a3f7 #0 Not tainted ------------------------------------------------------ syz-executor.2/15406 is trying to acquire lock: ffff88804b8a1dc0 (mapping.invalidate_lock#12){++++}-{3:3}, at: filemap_invalidate_lock_shared include/linux/fs.h:811 [inline] ffff88804b8a1dc0 (mapping.invalidate_lock#12){++++}-{3:3}, at: f2fs_vm_page_mkwrite+0x4f6/0x1350 fs/f2fs/file.c:104 but task is already holding lock: ffff88801fee8558 (sb_pagefaults#3){.+.+}-{0:0}, at: sb_start_pagefault include/linux/fs.h:1918 [inline] ffff88801fee8558 (sb_pagefaults#3){.+.+}-{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: -> #5 (sb_pagefaults#3){.+.+}-{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 -> #4 (&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 -> #3 (&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 scan_nat_page fs/f2fs/node.c:2387 [inline] __f2fs_build_free_nids fs/f2fs/node.c:2493 [inline] f2fs_build_free_nids+0xb8c/0x1190 fs/f2fs/node.c:2531 f2fs_fill_super+0x4a5f/0x6ee0 fs/f2fs/super.c:4334 mount_bdev+0x26c/0x3a0 fs/super.c:1359 legacy_get_tree+0xea/0x180 fs/fs_context.c:610 vfs_get_tree+0x88/0x270 fs/super.c:1489 do_new_mount+0x289/0xad0 fs/namespace.c:3145 do_mount fs/namespace.c:3488 [inline] __do_sys_mount fs/namespace.c:3697 [inline] __se_sys_mount+0x2d3/0x3c0 fs/namespace.c:3674 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 (&nm_i->nat_tree_lock){++++}-{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_get_node_info+0x100/0x1720 fs/f2fs/node.c:564 f2fs_new_node_page+0x402/0xea0 fs/f2fs/node.c:1295 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_openat fs/open.c:1342 [inline] __se_sys_openat fs/open.c:1337 [inline] __x64_sys_openat+0x243/0x290 fs/open.c:1337 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_file_write_iter+0x1fb9/0x2400 fs/f2fs/file.c:4707 do_iter_write+0x6c2/0xc20 fs/read_write.c:861 iter_file_splice_write+0x7fc/0xfc0 fs/splice.c:686 do_splice_from fs/splice.c:764 [inline] direct_splice_actor+0xe6/0x1c0 fs/splice.c:931 splice_direct_to_actor+0x4e4/0xc00 fs/splice.c:886 do_splice_direct+0x279/0x3d0 fs/splice.c:974 do_sendfile+0x5fb/0xf80 fs/read_write.c:1255 __do_sys_sendfile64 fs/read_write.c:1323 [inline] __se_sys_sendfile64+0x14f/0x1b0 fs/read_write.c:1309 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#12){++++}-{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#12 --> &mm->mmap_lock --> sb_pagefaults#3 Possible unsafe locking scenario: CPU0 CPU1 ---- ---- lock(sb_pagefaults#3); lock(&mm->mmap_lock); lock(sb_pagefaults#3); lock(mapping.invalidate_lock#12); *** DEADLOCK *** 2 locks held by syz-executor.2/15406: #0: ffff88807f55d8d8 (&mm->mmap_lock){++++}-{3:3}, at: mmap_read_lock+0x17/0x50 include/linux/mmap_lock.h:117 #1: ffff88801fee8558 (sb_pagefaults#3){.+.+}-{0:0}, at: sb_start_pagefault include/linux/fs.h:1918 [inline] #1: ffff88801fee8558 (sb_pagefaults#3){.+.+}-{0:0}, at: f2fs_vm_page_mkwrite+0x430/0x1350 fs/f2fs/file.c:99 stack backtrace: CPU: 1 PID: 15406 Comm: syz-executor.2 Not tainted 6.2.0-rc3-syzkaller-00060-gc757fc92a3f7 #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+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: 0033:0x7f55d5486c16 Code: 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 16 fc 8b 36 89 4c 17 fc 89 37 c3 RSP: 002b:00007ffd558936a8 EFLAGS: 00010202 RAX: 0000000020008140 RBX: 0000000000000000 RCX: 00786d74702f7665 RDX: 000000000000000a RSI: 6d74702f7665642f RDI: 0000000020008140 RBP: 00007ffd55893768 R08: 00007f55d5400000 R09: 00007f55d5000000 R10: 00007f55d5008708 R11: 0000000000000246 R12: 0000000000169af0 R13: 00007ffd55893790 R14: 00007f55d55abf80 R15: 0000000000000032