====================================================== WARNING: possible circular locking dependency detected 6.2.0-syzkaller-12485-gf3a2439f20d9 #0 Not tainted ------------------------------------------------------ syz-executor.5/14654 is trying to acquire lock: ffff88803b154180 (mapping.invalidate_lock#9){++++}-{3:3}, at: filemap_invalidate_lock_shared include/linux/fs.h:813 [inline] ffff88803b154180 (mapping.invalidate_lock#9){++++}-{3:3}, at: f2fs_vm_page_mkwrite+0x630/0x1cf0 fs/f2fs/file.c:104 but task is already holding lock: ffff88807a704558 (sb_pagefaults#3){.+.+}-{0:0}, at: do_page_mkwrite+0x19b/0x680 mm/memory.c:2925 which lock already depends on the new lock. the existing dependency chain (in reverse order) is: -> #5 (sb_pagefaults#3){.+.+}-{0:0}: percpu_down_read include/linux/percpu-rwsem.h:51 [inline] __sb_start_write include/linux/fs.h:1477 [inline] sb_start_pagefault include/linux/fs.h:1581 [inline] f2fs_vm_page_mkwrite+0x48a/0x1cf0 fs/f2fs/file.c:99 do_page_mkwrite+0x19b/0x680 mm/memory.c:2925 do_shared_fault mm/memory.c:4557 [inline] do_fault mm/memory.c:4625 [inline] handle_pte_fault mm/memory.c:4909 [inline] __handle_mm_fault+0x2242/0x3e60 mm/memory.c:5051 handle_mm_fault+0x2ba/0x9c0 mm/memory.c:5197 do_user_addr_fault+0x475/0x1230 arch/x86/mm/fault.c:1407 handle_page_fault arch/x86/mm/fault.c:1498 [inline] exc_page_fault+0x98/0x170 arch/x86/mm/fault.c:1554 asm_exc_page_fault+0x26/0x30 arch/x86/include/asm/idtentry.h:570 -> #4 (&mm->mmap_lock){++++}-{3:3}: __might_fault mm/memory.c:5625 [inline] __might_fault+0x10c/0x180 mm/memory.c:5618 _copy_to_user+0x29/0x150 lib/usercopy.c:36 copy_to_user include/linux/uaccess.h:169 [inline] f2fs_ioc_get_encryption_pwsalt fs/f2fs/file.c:2365 [inline] __f2fs_ioctl+0x3994/0xa910 fs/f2fs/file.c:4169 f2fs_ioctl+0x18e/0x220 fs/f2fs/file.c:4242 vfs_ioctl fs/ioctl.c:51 [inline] __do_sys_ioctl fs/ioctl.c:870 [inline] __se_sys_ioctl fs/ioctl.c:856 [inline] __x64_sys_ioctl+0x197/0x210 fs/ioctl.c:856 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x39/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x63/0xcd -> #3 (&sbi->sb_lock){++++}-{3:3}: down_write+0x92/0x200 kernel/locking/rwsem.c:1573 f2fs_down_write fs/f2fs/f2fs.h:2213 [inline] f2fs_handle_error+0x8e/0x220 fs/f2fs/super.c:3920 f2fs_check_nid_range.part.0+0x4d/0x60 fs/f2fs/node.c:39 f2fs_check_nid_range fs/f2fs/node.c:2282 [inline] add_free_nid.isra.0+0x781/0x940 fs/f2fs/node.c:2289 scan_nat_page fs/f2fs/node.c:2391 [inline] __f2fs_build_free_nids+0x5b5/0xe10 fs/f2fs/node.c:2497 f2fs_build_free_nids fs/f2fs/node.c:2535 [inline] f2fs_build_node_manager+0x2072/0x3000 fs/f2fs/node.c:3320 f2fs_fill_super+0x39ad/0x8b90 fs/f2fs/super.c:4328 mount_bdev+0x351/0x410 fs/super.c:1371 legacy_get_tree+0x109/0x220 fs/fs_context.c:610 vfs_get_tree+0x8d/0x350 fs/super.c:1501 do_new_mount fs/namespace.c:3042 [inline] path_mount+0x1342/0x1e40 fs/namespace.c:3372 do_mount fs/namespace.c:3385 [inline] __do_sys_mount fs/namespace.c:3594 [inline] __se_sys_mount fs/namespace.c:3571 [inline] __x64_sys_mount+0x283/0x300 fs/namespace.c:3571 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x39/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x63/0xcd -> #2 (&nm_i->nat_tree_lock){++++}-{3:3}: down_read+0x3d/0x50 kernel/locking/rwsem.c:1520 f2fs_down_read fs/f2fs/f2fs.h:2188 [inline] f2fs_get_node_info+0x1ac/0x1070 fs/f2fs/node.c:564 f2fs_new_node_page+0x249/0xac0 fs/f2fs/node.c:1295 f2fs_get_dnode_of_data+0x530/0x2480 fs/f2fs/node.c:810 f2fs_reserve_block+0x4d/0x430 fs/f2fs/data.c:1199 f2fs_get_new_data_page+0xfb/0x6b0 fs/f2fs/data.c:1387 f2fs_add_regular_entry+0x4e9/0xbe0 fs/f2fs/dir.c:754 f2fs_add_dentry+0x1b5/0x210 fs/f2fs/dir.c:816 f2fs_do_add_link+0x183/0x270 fs/f2fs/dir.c:855 f2fs_add_link fs/f2fs/f2fs.h:3564 [inline] f2fs_create+0x3c1/0x670 fs/f2fs/namei.c:363 lookup_open.isra.0+0x105a/0x1400 fs/namei.c:3416 open_last_lookups fs/namei.c:3484 [inline] path_openat+0x975/0x2750 fs/namei.c:3712 do_filp_open+0x1ba/0x410 fs/namei.c:3742 do_sys_openat2+0x16d/0x4c0 fs/open.c:1312 do_sys_open fs/open.c:1328 [inline] __do_sys_open fs/open.c:1336 [inline] __se_sys_open fs/open.c:1332 [inline] __x64_sys_open+0x11d/0x1c0 fs/open.c:1332 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x39/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x63/0xcd -> #1 (&sbi->cp_rwsem){++++}-{3:3}: down_read+0x3d/0x50 kernel/locking/rwsem.c:1520 f2fs_down_read fs/f2fs/f2fs.h:2188 [inline] f2fs_lock_op fs/f2fs/f2fs.h:2231 [inline] f2fs_do_truncate_blocks+0x6ae/0x1220 fs/f2fs/file.c:688 f2fs_truncate_blocks+0x7b/0x310 fs/f2fs/file.c:751 f2fs_truncate.part.0+0x55e/0x7f0 fs/f2fs/file.c:803 f2fs_truncate include/linux/fs.h:808 [inline] f2fs_setattr+0x1738/0x2090 fs/f2fs/file.c:1010 notify_change+0xb2c/0x1180 fs/attr.c:482 do_truncate+0x143/0x200 fs/open.c:66 handle_truncate fs/namei.c:3219 [inline] do_open fs/namei.c:3564 [inline] path_openat+0x2083/0x2750 fs/namei.c:3715 do_filp_open+0x1ba/0x410 fs/namei.c:3742 do_sys_openat2+0x16d/0x4c0 fs/open.c:1312 do_sys_open fs/open.c:1328 [inline] __do_sys_openat fs/open.c:1344 [inline] __se_sys_openat fs/open.c:1339 [inline] __x64_sys_openat+0x143/0x1f0 fs/open.c:1339 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x39/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x63/0xcd -> #0 (mapping.invalidate_lock#9){++++}-{3:3}: check_prev_add kernel/locking/lockdep.c:3098 [inline] check_prevs_add kernel/locking/lockdep.c:3217 [inline] validate_chain kernel/locking/lockdep.c:3832 [inline] __lock_acquire+0x2ec7/0x5d40 kernel/locking/lockdep.c:5056 lock_acquire kernel/locking/lockdep.c:5669 [inline] lock_acquire+0x1e3/0x670 kernel/locking/lockdep.c:5634 down_read+0x3d/0x50 kernel/locking/rwsem.c:1520 filemap_invalidate_lock_shared include/linux/fs.h:813 [inline] f2fs_vm_page_mkwrite+0x630/0x1cf0 fs/f2fs/file.c:104 do_page_mkwrite+0x19b/0x680 mm/memory.c:2925 do_shared_fault mm/memory.c:4557 [inline] do_fault mm/memory.c:4625 [inline] handle_pte_fault mm/memory.c:4909 [inline] __handle_mm_fault+0x2242/0x3e60 mm/memory.c:5051 handle_mm_fault+0x2ba/0x9c0 mm/memory.c:5197 do_user_addr_fault+0x475/0x1230 arch/x86/mm/fault.c:1407 handle_page_fault arch/x86/mm/fault.c:1498 [inline] exc_page_fault+0x98/0x170 arch/x86/mm/fault.c:1554 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#9 --> &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#9); *** DEADLOCK *** 2 locks held by syz-executor.5/14654: #0: ffff888017e5de18 (&mm->mmap_lock){++++}-{3:3}, at: mmap_read_lock include/linux/mmap_lock.h:117 [inline] #0: ffff888017e5de18 (&mm->mmap_lock){++++}-{3:3}, at: do_user_addr_fault+0xa51/0x1230 arch/x86/mm/fault.c:1358 #1: ffff88807a704558 (sb_pagefaults#3){.+.+}-{0:0}, at: do_page_mkwrite+0x19b/0x680 mm/memory.c:2925 stack backtrace: CPU: 1 PID: 14654 Comm: syz-executor.5 Not tainted 6.2.0-syzkaller-12485-gf3a2439f20d9 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/16/2023 Call Trace: __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0xd9/0x150 lib/dump_stack.c:106 check_noncircular+0x25f/0x2e0 kernel/locking/lockdep.c:2178 check_prev_add kernel/locking/lockdep.c:3098 [inline] check_prevs_add kernel/locking/lockdep.c:3217 [inline] validate_chain kernel/locking/lockdep.c:3832 [inline] __lock_acquire+0x2ec7/0x5d40 kernel/locking/lockdep.c:5056 lock_acquire kernel/locking/lockdep.c:5669 [inline] lock_acquire+0x1e3/0x670 kernel/locking/lockdep.c:5634 down_read+0x3d/0x50 kernel/locking/rwsem.c:1520 filemap_invalidate_lock_shared include/linux/fs.h:813 [inline] f2fs_vm_page_mkwrite+0x630/0x1cf0 fs/f2fs/file.c:104 do_page_mkwrite+0x19b/0x680 mm/memory.c:2925 do_shared_fault mm/memory.c:4557 [inline] do_fault mm/memory.c:4625 [inline] handle_pte_fault mm/memory.c:4909 [inline] __handle_mm_fault+0x2242/0x3e60 mm/memory.c:5051 handle_mm_fault+0x2ba/0x9c0 mm/memory.c:5197 do_user_addr_fault+0x475/0x1230 arch/x86/mm/fault.c:1407 handle_page_fault arch/x86/mm/fault.c:1498 [inline] exc_page_fault+0x98/0x170 arch/x86/mm/fault.c:1554 asm_exc_page_fault+0x26/0x30 arch/x86/include/asm/idtentry.h:570 RIP: 0033:0x7fe6db42bd79 Code: 48 8b 04 24 48 85 c0 74 17 48 8b 54 24 18 48 0f ca 48 89 54 24 18 48 83 f8 01 0f 85 9b 02 00 00 48 8b 44 24 10 48 8b 54 24 18 <48> 89 10 e9 c2 fd ff ff 48 8b 44 24 10 0f b7 10 48 8b 04 24 48 85 RSP: 002b:00007ffe523b90a0 EFLAGS: 00010246 RAX: 0000000020007fc0 RBX: 0000000000000000 RCX: 0000000000000000 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 00005555569d82e8 RBP: 00007ffe523b9198 R08: 0000000000000000 R09: 0000000000000000 R10: 00007fe6db008210 R11: 0000000000000246 R12: 00000000000b7f50 R13: 00007ffe523b91c0 R14: 00007fe6db5abf80 R15: 0000000000000032