loop1: detected capacity change from 0 to 4096 ====================================================== WARNING: possible circular locking dependency detected 6.15.0-rc1-syzkaller-00025-gbec7dcbc242c #0 Not tainted ------------------------------------------------------ syz.1.265/8301 is trying to acquire lock: ffff88807bab8fb0 (&ni->ni_lock#3/5){+.+.}-{4:4}, at: ni_lock fs/ntfs3/ntfs_fs.h:1105 [inline] ffff88807bab8fb0 (&ni->ni_lock#3/5){+.+.}-{4:4}, at: ntfs_fallocate+0x864/0x1310 fs/ntfs3/file.c:685 but task is already holding lock: ffff88807bab93e8 (mapping.invalidate_lock#10){++++}-{4:4}, at: filemap_invalidate_lock include/linux/fs.h:912 [inline] ffff88807bab93e8 (mapping.invalidate_lock#10){++++}-{4:4}, at: ntfs_fallocate+0x3e9/0x1310 fs/ntfs3/file.c:615 which lock already depends on the new lock. the existing dependency chain (in reverse order) is: -> #2 (mapping.invalidate_lock#10){++++}-{4:4}: lock_acquire+0x116/0x2f0 kernel/locking/lockdep.c:5866 down_read+0xb3/0xa50 kernel/locking/rwsem.c:1524 filemap_invalidate_lock_shared include/linux/fs.h:922 [inline] filemap_fault+0x66b/0x13d0 mm/filemap.c:3390 __do_fault+0x135/0x390 mm/memory.c:5098 do_read_fault mm/memory.c:5518 [inline] do_fault mm/memory.c:5652 [inline] do_pte_missing mm/memory.c:4160 [inline] handle_pte_fault+0x3f0c/0x61c0 mm/memory.c:5997 __handle_mm_fault mm/memory.c:6140 [inline] handle_mm_fault+0x1030/0x1aa0 mm/memory.c:6309 do_user_addr_fault arch/x86/mm/fault.c:1388 [inline] handle_page_fault arch/x86/mm/fault.c:1480 [inline] exc_page_fault+0x2bb/0x920 arch/x86/mm/fault.c:1538 asm_exc_page_fault+0x26/0x30 arch/x86/include/asm/idtentry.h:623 fault_in_readable+0x115/0x2e0 mm/gup.c:2233 fault_in_iov_iter_readable+0x229/0x280 lib/iov_iter.c:94 generic_perform_write+0x8a4/0xa10 mm/filemap.c:4151 ntfs_file_write_iter+0x6ef/0x7e0 fs/ntfs3/file.c:1287 new_sync_write fs/read_write.c:591 [inline] vfs_write+0x70f/0xd10 fs/read_write.c:684 ksys_write+0x19d/0x2d0 fs/read_write.c:736 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xf3/0x230 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f -> #1 (&mm->mmap_lock){++++}-{4:4}: lock_acquire+0x116/0x2f0 kernel/locking/lockdep.c:5866 __might_fault+0xc6/0x120 mm/memory.c:7151 _inline_copy_to_user include/linux/uaccess.h:192 [inline] _copy_to_user+0x2c/0xb0 lib/usercopy.c:26 copy_to_user include/linux/uaccess.h:225 [inline] fiemap_fill_next_extent+0x237/0x420 fs/ioctl.c:145 ni_fiemap+0x983/0x12a0 fs/ntfs3/frecord.c:1985 ntfs_fiemap+0x134/0x180 fs/ntfs3/file.c:1380 ioctl_fiemap fs/ioctl.c:220 [inline] do_vfs_ioctl+0x1975/0x2750 fs/ioctl.c:840 __do_sys_ioctl fs/ioctl.c:904 [inline] __se_sys_ioctl+0x80/0x160 fs/ioctl.c:892 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xf3/0x230 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f -> #0 (&ni->ni_lock#3/5){+.+.}-{4:4}: check_prev_add kernel/locking/lockdep.c:3166 [inline] check_prevs_add kernel/locking/lockdep.c:3285 [inline] validate_chain+0xa69/0x24e0 kernel/locking/lockdep.c:3909 __lock_acquire+0xad5/0xd80 kernel/locking/lockdep.c:5235 lock_acquire+0x116/0x2f0 kernel/locking/lockdep.c:5866 __mutex_lock_common kernel/locking/mutex.c:601 [inline] __mutex_lock+0x1a5/0x10c0 kernel/locking/mutex.c:746 ni_lock fs/ntfs3/ntfs_fs.h:1105 [inline] ntfs_fallocate+0x864/0x1310 fs/ntfs3/file.c:685 vfs_fallocate+0x627/0x7a0 fs/open.c:338 ksys_fallocate fs/open.c:362 [inline] __do_sys_fallocate fs/open.c:367 [inline] __se_sys_fallocate fs/open.c:365 [inline] __x64_sys_fallocate+0xbc/0x110 fs/open.c:365 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xf3/0x230 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f other info that might help us debug this: Chain exists of: &ni->ni_lock#3/5 --> &mm->mmap_lock --> mapping.invalidate_lock#10 Possible unsafe locking scenario: CPU0 CPU1 ---- ---- lock(mapping.invalidate_lock#10); lock(&mm->mmap_lock); lock(mapping.invalidate_lock#10); lock(&ni->ni_lock#3/5); *** DEADLOCK *** 3 locks held by syz.1.265/8301: #0: ffff888057e78420 (sb_writers#22){.+.+}-{0:0}, at: file_start_write include/linux/fs.h:3041 [inline] #0: ffff888057e78420 (sb_writers#22){.+.+}-{0:0}, at: vfs_fallocate+0x5a1/0x7a0 fs/open.c:337 #1: ffff88807bab9248 (&sb->s_type->i_mutex_key#26){+.+.}-{4:4}, at: inode_lock include/linux/fs.h:867 [inline] #1: ffff88807bab9248 (&sb->s_type->i_mutex_key#26){+.+.}-{4:4}, at: ntfs_fallocate+0x303/0x1310 fs/ntfs3/file.c:601 #2: ffff88807bab93e8 (mapping.invalidate_lock#10){++++}-{4:4}, at: filemap_invalidate_lock include/linux/fs.h:912 [inline] #2: ffff88807bab93e8 (mapping.invalidate_lock#10){++++}-{4:4}, at: ntfs_fallocate+0x3e9/0x1310 fs/ntfs3/file.c:615 stack backtrace: CPU: 1 UID: 0 PID: 8301 Comm: syz.1.265 Not tainted 6.15.0-rc1-syzkaller-00025-gbec7dcbc242c #0 PREEMPT(full) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2025 Call Trace: __dump_stack lib/dump_stack.c:94 [inline] dump_stack_lvl+0x241/0x360 lib/dump_stack.c:120 print_circular_bug+0x2e1/0x300 kernel/locking/lockdep.c:2079 check_noncircular+0x142/0x160 kernel/locking/lockdep.c:2211 check_prev_add kernel/locking/lockdep.c:3166 [inline] check_prevs_add kernel/locking/lockdep.c:3285 [inline] validate_chain+0xa69/0x24e0 kernel/locking/lockdep.c:3909 __lock_acquire+0xad5/0xd80 kernel/locking/lockdep.c:5235 lock_acquire+0x116/0x2f0 kernel/locking/lockdep.c:5866 __mutex_lock_common kernel/locking/mutex.c:601 [inline] __mutex_lock+0x1a5/0x10c0 kernel/locking/mutex.c:746 ni_lock fs/ntfs3/ntfs_fs.h:1105 [inline] ntfs_fallocate+0x864/0x1310 fs/ntfs3/file.c:685 vfs_fallocate+0x627/0x7a0 fs/open.c:338 ksys_fallocate fs/open.c:362 [inline] __do_sys_fallocate fs/open.c:367 [inline] __se_sys_fallocate fs/open.c:365 [inline] __x64_sys_fallocate+0xbc/0x110 fs/open.c:365 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xf3/0x230 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7fd4a9b8d169 Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 a8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007fd4aaa78038 EFLAGS: 00000246 ORIG_RAX: 000000000000011d RAX: ffffffffffffffda RBX: 00007fd4a9da5fa0 RCX: 00007fd4a9b8d169 RDX: 0000000000000400 RSI: 0000000000000008 RDI: 0000000000000004 RBP: 00007fd4a9c0e2a0 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000007000000 R11: 0000000000000246 R12: 0000000000000000 R13: 0000000000000000 R14: 00007fd4a9da5fa0 R15: 00007ffe5019a8c8