====================================================== WARNING: possible circular locking dependency detected 6.2.0-rc7-syzkaller-00199-g420b2d431d18 #0 Not tainted ------------------------------------------------------ syz-executor.4/18341 is trying to acquire lock: ffff888090129570 (mapping.invalidate_lock#3){++++}-{3:3}, at: filemap_invalidate_lock_shared include/linux/fs.h:811 [inline] ffff888090129570 (mapping.invalidate_lock#3){++++}-{3:3}, at: f2fs_vm_page_mkwrite+0x630/0x1c90 fs/f2fs/file.c:104 but task is already holding lock: ffff88801c938558 (sb_pagefaults#2){.+.+}-{0:0}, at: do_page_mkwrite+0x19b/0x680 mm/memory.c:2943 which lock already depends on the new lock. the existing dependency chain (in reverse order) is: -> #5 (sb_pagefaults#2){.+.+}-{0:0}: percpu_down_read include/linux/percpu-rwsem.h:51 [inline] __sb_start_write include/linux/fs.h:1814 [inline] sb_start_pagefault include/linux/fs.h:1918 [inline] f2fs_vm_page_mkwrite+0x48a/0x1c90 fs/f2fs/file.c:99 do_page_mkwrite+0x19b/0x680 mm/memory.c:2943 wp_page_shared mm/memory.c:3291 [inline] do_wp_page+0x353/0x3370 mm/memory.c:3373 handle_pte_fault mm/memory.c:4949 [inline] __handle_mm_fault+0x1f58/0x3c90 mm/memory.c:5073 handle_mm_fault+0x1b6/0x850 mm/memory.c:5219 do_user_addr_fault+0x475/0x1210 arch/x86/mm/fault.c:1428 handle_page_fault arch/x86/mm/fault.c:1519 [inline] exc_page_fault+0x98/0x170 arch/x86/mm/fault.c:1575 asm_exc_page_fault+0x26/0x30 arch/x86/include/asm/idtentry.h:570 -> #4 (&mm->mmap_lock){++++}-{3:3}: __might_fault mm/memory.c:5647 [inline] __might_fault+0x10c/0x180 mm/memory.c:5640 _copy_to_user+0x29/0x150 lib/usercopy.c:29 copy_to_user include/linux/uaccess.h:169 [inline] f2fs_ioc_get_encryption_pwsalt+0x2b2/0x370 fs/f2fs/file.c:2365 __f2fs_ioctl+0x29f1/0xaaf0 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+0x94/0x220 kernel/locking/rwsem.c:1562 f2fs_down_write fs/f2fs/f2fs.h:2213 [inline] f2fs_handle_error+0x8e/0x200 fs/f2fs/super.c:3926 f2fs_check_nid_range.part.0+0x4d/0x60 fs/f2fs/node.c:39 f2fs_check_nid_range fs/f2fs/node.c:2278 [inline] add_free_nid.isra.0+0x781/0x940 fs/f2fs/node.c:2285 scan_nat_page fs/f2fs/node.c:2387 [inline] __f2fs_build_free_nids+0x5b5/0xe10 fs/f2fs/node.c:2493 f2fs_build_free_nids fs/f2fs/node.c:2531 [inline] f2fs_build_node_manager+0x2007/0x2fb0 fs/f2fs/node.c:3316 f2fs_fill_super+0x3ade/0x7680 fs/f2fs/super.c:4334 mount_bdev+0x351/0x410 fs/super.c:1359 legacy_get_tree+0x109/0x220 fs/fs_context.c:610 vfs_get_tree+0x8d/0x2f0 fs/super.c:1489 do_new_mount fs/namespace.c:3145 [inline] path_mount+0x132a/0x1e20 fs/namespace.c:3475 do_mount fs/namespace.c:3488 [inline] __do_sys_mount fs/namespace.c:3697 [inline] __se_sys_mount fs/namespace.c:3674 [inline] __x64_sys_mount+0x283/0x300 fs/namespace.c:3674 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+0x9c/0x450 kernel/locking/rwsem.c:1509 f2fs_down_read fs/f2fs/f2fs.h:2188 [inline] f2fs_get_node_info+0x1ac/0x1070 fs/f2fs/node.c:564 f2fs_do_write_data_page+0x7f5/0x1e20 fs/f2fs/data.c:2728 f2fs_write_single_data_page+0x13f0/0x1920 fs/f2fs/data.c:2863 f2fs_write_cache_pages+0xaa8/0x2010 fs/f2fs/data.c:3115 __f2fs_write_data_pages fs/f2fs/data.c:3265 [inline] f2fs_write_data_pages+0x4c7/0x1230 fs/f2fs/data.c:3292 do_writepages+0x1af/0x690 mm/page-writeback.c:2581 filemap_fdatawrite_wbc mm/filemap.c:388 [inline] filemap_fdatawrite_wbc+0x147/0x1b0 mm/filemap.c:378 __filemap_fdatawrite_range+0xb8/0xf0 mm/filemap.c:421 file_write_and_wait_range+0xce/0x140 mm/filemap.c:777 f2fs_do_sync_file+0x3a4/0x2a20 fs/f2fs/file.c:275 f2fs_sync_file+0x13a/0x190 fs/f2fs/file.c:393 vfs_fsync_range+0x13e/0x230 fs/sync.c:188 generic_write_sync include/linux/fs.h:2885 [inline] f2fs_file_write_iter+0x1840/0x31c0 fs/f2fs/file.c:4721 call_write_iter include/linux/fs.h:2189 [inline] new_sync_write fs/read_write.c:491 [inline] vfs_write+0x9ed/0xdd0 fs/read_write.c:584 ksys_write+0x12b/0x250 fs/read_write.c:637 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+0x9c/0x450 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+0x6ae/0x11e0 fs/f2fs/file.c:688 f2fs_truncate_blocks+0x7b/0x310 fs/f2fs/file.c:751 f2fs_truncate.part.0+0x498/0x7c0 fs/f2fs/file.c:803 f2fs_truncate include/linux/fs.h:806 [inline] f2fs_setattr+0x1b00/0x2350 fs/f2fs/file.c:1010 notify_change+0xca7/0x1420 fs/attr.c:482 do_truncate+0x143/0x200 fs/open.c:65 handle_truncate fs/namei.c:3216 [inline] do_open fs/namei.c:3561 [inline] path_openat+0x2157/0x2a50 fs/namei.c:3714 do_filp_open+0x1ba/0x410 fs/namei.c:3741 do_sys_openat2+0x16d/0x4c0 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+0x143/0x1f0 fs/open.c:1337 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#3){++++}-{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+0x2a43/0x56d0 kernel/locking/lockdep.c:5055 lock_acquire kernel/locking/lockdep.c:5668 [inline] lock_acquire+0x1e3/0x630 kernel/locking/lockdep.c:5633 down_read+0x9c/0x450 kernel/locking/rwsem.c:1509 filemap_invalidate_lock_shared include/linux/fs.h:811 [inline] f2fs_vm_page_mkwrite+0x630/0x1c90 fs/f2fs/file.c:104 do_page_mkwrite+0x19b/0x680 mm/memory.c:2943 wp_page_shared mm/memory.c:3291 [inline] do_wp_page+0x353/0x3370 mm/memory.c:3373 handle_pte_fault mm/memory.c:4949 [inline] __handle_mm_fault+0x1f58/0x3c90 mm/memory.c:5073 handle_mm_fault+0x1b6/0x850 mm/memory.c:5219 do_user_addr_fault+0x475/0x1210 arch/x86/mm/fault.c:1428 handle_page_fault arch/x86/mm/fault.c:1519 [inline] exc_page_fault+0x98/0x170 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#3 --> &mm->mmap_lock --> sb_pagefaults#2 Possible unsafe locking scenario: CPU0 CPU1 ---- ---- lock(sb_pagefaults#2); lock(&mm->mmap_lock); lock(sb_pagefaults#2); lock(mapping.invalidate_lock#3); *** DEADLOCK *** 2 locks held by syz-executor.4/18341: #0: ffff88801c5d0dd8 (&mm->mmap_lock){++++}-{3:3}, at: mmap_read_trylock include/linux/mmap_lock.h:136 [inline] #0: ffff88801c5d0dd8 (&mm->mmap_lock){++++}-{3:3}, at: do_user_addr_fault+0x276/0x1210 arch/x86/mm/fault.c:1369 #1: ffff88801c938558 (sb_pagefaults#2){.+.+}-{0:0}, at: do_page_mkwrite+0x19b/0x680 mm/memory.c:2943 stack backtrace: CPU: 0 PID: 18341 Comm: syz-executor.4 Not tainted 6.2.0-rc7-syzkaller-00199-g420b2d431d18 #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+0xd1/0x138 lib/dump_stack.c:106 check_noncircular+0x25f/0x2e0 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+0x2a43/0x56d0 kernel/locking/lockdep.c:5055 lock_acquire kernel/locking/lockdep.c:5668 [inline] lock_acquire+0x1e3/0x630 kernel/locking/lockdep.c:5633 down_read+0x9c/0x450 kernel/locking/rwsem.c:1509 filemap_invalidate_lock_shared include/linux/fs.h:811 [inline] f2fs_vm_page_mkwrite+0x630/0x1c90 fs/f2fs/file.c:104 do_page_mkwrite+0x19b/0x680 mm/memory.c:2943 wp_page_shared mm/memory.c:3291 [inline] do_wp_page+0x353/0x3370 mm/memory.c:3373 handle_pte_fault mm/memory.c:4949 [inline] __handle_mm_fault+0x1f58/0x3c90 mm/memory.c:5073 handle_mm_fault+0x1b6/0x850 mm/memory.c:5219 do_user_addr_fault+0x475/0x1210 arch/x86/mm/fault.c:1428 handle_page_fault arch/x86/mm/fault.c:1519 [inline] exc_page_fault+0x98/0x170 arch/x86/mm/fault.c:1575 asm_exc_page_fault+0x26/0x30 arch/x86/include/asm/idtentry.h:570 RIP: 0033:0x7f23e282be6a Code: 30 48 8b 34 24 48 85 f6 74 17 8b 44 24 18 0f c8 89 c0 48 89 44 24 18 48 83 fe 01 0f 85 a1 01 00 00 48 8b 44 24 10 8b 74 24 18 <89> 30 e9 d2 fc ff ff 48 8b 44 24 10 8b 10 48 8b 04 24 48 85 c0 0f RSP: 002b:00007ffc41d21820 EFLAGS: 00010246 RAX: 0000000020001880 RBX: 0000000000000000 RCX: 0000000000000000 RDX: 4c2d6d034f9659e2 RSI: 0000000000000000 RDI: 0000555555f462e8 RBP: 00007ffc41d21918 R08: 0000000000000000 R09: 0000000000000000 R10: 00007f23e2408188 R11: 0000000000000246 R12: 00000000000d1cc5 R13: 00007ffc41d21940 R14: 00007f23e29ac050 R15: 0000000000000032