loop4: detected capacity change from 0 to 4096 ntfs3: loop4: Different NTFS' sector size (4096) and media sector size (512) ====================================================== WARNING: possible circular locking dependency detected syzkaller #0 Not tainted ------------------------------------------------------ syz.4.454/5772 is trying to acquire lock: ffff888024770128 (&mm->mmap_lock){++++}-{3:3}, at: __might_fault+0x90/0x110 mm/memory.c:5356 but task is already holding lock: ffff88805f32f050 (&ni->file.run_lock#3){++++}-{3:3}, at: ni_fiemap+0x2e8/0xc50 fs/ntfs3/frecord.c:1940 which lock already depends on the new lock. the existing dependency chain (in reverse order) is: -> #2 (&ni->file.run_lock#3){++++}-{3:3}: down_read+0x44/0x2e0 kernel/locking/rwsem.c:1498 attr_data_get_block+0x148/0x18d0 fs/ntfs3/attrib.c:831 ntfs_get_block_vbo+0x329/0xca0 fs/ntfs3/inode.c:593 do_mpage_readpage+0x83a/0x1e50 fs/mpage.c:231 mpage_readahead+0x3ef/0x920 fs/mpage.c:389 read_pages+0x175/0x930 mm/readahead.c:130 page_cache_ra_unbounded+0x838/0x940 mm/readahead.c:239 do_sync_mmap_readahead+0x5c9/0x730 mm/filemap.c:2996 filemap_fault+0x70f/0x1370 mm/filemap.c:3089 __do_fault+0x141/0x330 mm/memory.c:3928 do_read_fault mm/memory.c:4264 [inline] do_fault mm/memory.c:4392 [inline] handle_pte_fault mm/memory.c:4650 [inline] __handle_mm_fault mm/memory.c:4785 [inline] handle_mm_fault+0x2985/0x4410 mm/memory.c:4883 faultin_page mm/gup.c:976 [inline] __get_user_pages+0x94b/0x11e0 mm/gup.c:1197 __get_user_pages_locked mm/gup.c:1382 [inline] get_user_pages_unlocked+0x258/0x700 mm/gup.c:2222 __gup_longterm_unlocked mm/gup.c:2823 [inline] internal_get_user_pages_fast+0x1cd1/0x20b0 mm/gup.c:2911 iov_iter_get_pages+0x228/0x5c0 lib/iov_iter.c:1544 dio_refill_pages fs/direct-io.c:173 [inline] dio_get_page fs/direct-io.c:217 [inline] do_direct_IO fs/direct-io.c:938 [inline] do_blockdev_direct_IO fs/direct-io.c:1276 [inline] __blockdev_direct_IO+0xfcf/0x3a70 fs/direct-io.c:1368 blockdev_direct_IO include/linux/fs.h:3345 [inline] ntfs_direct_IO+0x194/0x390 fs/ntfs3/inode.c:800 generic_file_direct_write+0x22c/0x490 mm/filemap.c:3687 __generic_file_write_iter+0x2b1/0x4e0 mm/filemap.c:3869 ntfs_file_write_iter+0x4d5/0x590 fs/ntfs3/file.c:1147 do_iter_readv_writev+0x47e/0x5f0 fs/read_write.c:-1 do_iter_write+0x205/0x7b0 fs/read_write.c:855 vfs_writev fs/read_write.c:928 [inline] do_pwritev+0x240/0x3a0 fs/read_write.c:1025 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x66/0xd0 -> #1 (mapping.invalidate_lock#12){.+.+}-{3:3}: down_read+0x44/0x2e0 kernel/locking/rwsem.c:1498 filemap_invalidate_lock_shared include/linux/fs.h:842 [inline] filemap_fault+0x699/0x1370 mm/filemap.c:3081 __do_fault+0x141/0x330 mm/memory.c:3928 do_read_fault mm/memory.c:4264 [inline] do_fault mm/memory.c:4392 [inline] handle_pte_fault mm/memory.c:4650 [inline] __handle_mm_fault mm/memory.c:4785 [inline] handle_mm_fault+0x2985/0x4410 mm/memory.c:4883 faultin_page mm/gup.c:976 [inline] __get_user_pages+0x94b/0x11e0 mm/gup.c:1197 __get_user_pages_locked mm/gup.c:1382 [inline] get_user_pages_unlocked+0x258/0x700 mm/gup.c:2222 __gup_longterm_unlocked mm/gup.c:2823 [inline] internal_get_user_pages_fast+0x1cd1/0x20b0 mm/gup.c:2911 iov_iter_get_pages+0x228/0x5c0 lib/iov_iter.c:1544 dio_refill_pages fs/direct-io.c:173 [inline] dio_get_page fs/direct-io.c:217 [inline] do_direct_IO fs/direct-io.c:938 [inline] do_blockdev_direct_IO fs/direct-io.c:1276 [inline] __blockdev_direct_IO+0xfcf/0x3a70 fs/direct-io.c:1368 blockdev_direct_IO include/linux/fs.h:3345 [inline] ntfs_direct_IO+0x194/0x390 fs/ntfs3/inode.c:800 generic_file_direct_write+0x22c/0x490 mm/filemap.c:3687 __generic_file_write_iter+0x2b1/0x4e0 mm/filemap.c:3869 ntfs_file_write_iter+0x4d5/0x590 fs/ntfs3/file.c:1147 do_iter_readv_writev+0x47e/0x5f0 fs/read_write.c:-1 do_iter_write+0x205/0x7b0 fs/read_write.c:855 vfs_writev fs/read_write.c:928 [inline] do_pwritev+0x240/0x3a0 fs/read_write.c:1025 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x66/0xd0 -> #0 (&mm->mmap_lock){++++}-{3:3}: check_prev_add kernel/locking/lockdep.c:3053 [inline] check_prevs_add kernel/locking/lockdep.c:3172 [inline] validate_chain kernel/locking/lockdep.c:3788 [inline] __lock_acquire+0x2c42/0x7d10 kernel/locking/lockdep.c:5012 lock_acquire+0x19e/0x400 kernel/locking/lockdep.c:5623 __might_fault+0xb3/0x110 mm/memory.c:5357 _copy_to_user+0x29/0x130 lib/usercopy.c:35 copy_to_user include/linux/uaccess.h:200 [inline] fiemap_fill_next_extent+0x1ba/0x390 fs/ioctl.c:144 ni_fiemap+0x915/0xc50 fs/ntfs3/frecord.c:2044 ntfs_fiemap+0xd7/0x130 fs/ntfs3/file.c:1236 ioctl_fiemap fs/ioctl.c:219 [inline] do_vfs_ioctl+0x152d/0x1ef0 fs/ioctl.c:814 __do_sys_ioctl fs/ioctl.c:872 [inline] __se_sys_ioctl+0x83/0x170 fs/ioctl.c:860 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x66/0xd0 other info that might help us debug this: Chain exists of: &mm->mmap_lock --> mapping.invalidate_lock#12 --> &ni->file.run_lock#3 Possible unsafe locking scenario: CPU0 CPU1 ---- ---- lock(&ni->file.run_lock#3); lock(mapping.invalidate_lock#12); lock(&ni->file.run_lock#3); lock(&mm->mmap_lock); *** DEADLOCK *** 2 locks held by syz.4.454/5772: #0: ffff88805f32efa0 (&ni->ni_lock/5){+.+.}-{3:3}, at: ni_lock fs/ntfs3/ntfs_fs.h:1100 [inline] #0: ffff88805f32efa0 (&ni->ni_lock/5){+.+.}-{3:3}, at: ntfs_fiemap+0xc4/0x130 fs/ntfs3/file.c:1234 #1: ffff88805f32f050 (&ni->file.run_lock#3){++++}-{3:3}, at: ni_fiemap+0x2e8/0xc50 fs/ntfs3/frecord.c:1940 stack backtrace: CPU: 1 PID: 5772 Comm: syz.4.454 Not tainted syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/25/2025 Call Trace: dump_stack_lvl+0x188/0x250 lib/dump_stack.c:106 check_noncircular+0x296/0x330 kernel/locking/lockdep.c:2133 check_prev_add kernel/locking/lockdep.c:3053 [inline] check_prevs_add kernel/locking/lockdep.c:3172 [inline] validate_chain kernel/locking/lockdep.c:3788 [inline] __lock_acquire+0x2c42/0x7d10 kernel/locking/lockdep.c:5012 lock_acquire+0x19e/0x400 kernel/locking/lockdep.c:5623 __might_fault+0xb3/0x110 mm/memory.c:5357 _copy_to_user+0x29/0x130 lib/usercopy.c:35 copy_to_user include/linux/uaccess.h:200 [inline] fiemap_fill_next_extent+0x1ba/0x390 fs/ioctl.c:144 ni_fiemap+0x915/0xc50 fs/ntfs3/frecord.c:2044 ntfs_fiemap+0xd7/0x130 fs/ntfs3/file.c:1236 ioctl_fiemap fs/ioctl.c:219 [inline] do_vfs_ioctl+0x152d/0x1ef0 fs/ioctl.c:814 __do_sys_ioctl fs/ioctl.c:872 [inline] __se_sys_ioctl+0x83/0x170 fs/ioctl.c:860 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x66/0xd0 RIP: 0033:0x7f1eec051cb9 Code: ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 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 e8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007f1eea2ad028 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 00007f1eec2ccfa0 RCX: 00007f1eec051cb9 RDX: 0000200000000340 RSI: 00000000c020660b RDI: 0000000000000005 RBP: 00007f1eec0bfbf7 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007f1eec2cd038 R14: 00007f1eec2ccfa0 R15: 00007fff8d6029d8