loop6: detected capacity change from 0 to 4096 ====================================================== WARNING: possible circular locking dependency detected syzkaller #0 Tainted: G L ------------------------------------------------------ syz.6.1926/15662 is trying to acquire lock: ffff8880478ccea8 (&ni->ni_lock/5){+.+.}-{4:4}, at: ni_lock fs/ntfs3/ntfs_fs.h:1247 [inline] ffff8880478ccea8 (&ni->ni_lock/5){+.+.}-{4:4}, at: attr_data_get_block+0x1cd/0x2c0 fs/ntfs3/attrib.c:976 but task is already holding lock: ffff8880478cd2d8 (mapping.invalidate_lock#7){.+.+}-{4:4}, at: filemap_invalidate_lock_shared include/linux/fs.h:1090 [inline] ffff8880478cd2d8 (mapping.invalidate_lock#7){.+.+}-{4:4}, at: filemap_fault+0x6d7/0x13b0 mm/filemap.c:3585 which lock already depends on the new lock. the existing dependency chain (in reverse order) is: -> #2 (mapping.invalidate_lock#7){.+.+}-{4:4}: down_read+0x4a/0x330 kernel/locking/rwsem.c:1574 filemap_invalidate_lock_shared include/linux/fs.h:1090 [inline] filemap_fault+0x6d7/0x13b0 mm/filemap.c:3585 __do_fault+0x138/0x2a0 mm/memory.c:5503 do_read_fault mm/memory.c:5938 [inline] do_fault mm/memory.c:6072 [inline] do_pte_missing+0x2215/0x34b0 mm/memory.c:4638 handle_pte_fault mm/memory.c:6496 [inline] __handle_mm_fault mm/memory.c:6645 [inline] handle_mm_fault+0x19f5/0x3720 mm/memory.c:6814 faultin_page mm/gup.c:1126 [inline] __get_user_pages+0x1675/0x2750 mm/gup.c:1428 populate_vma_page_range+0x2be/0x3c0 mm/gup.c:1860 __mm_populate+0x25f/0x390 mm/gup.c:1963 mm_populate include/linux/mm.h:4229 [inline] vm_mmap_pgoff+0x353/0x4e0 mm/util.c:586 ksys_mmap_pgoff+0x4dc/0x760 mm/mmap.c:619 do_syscall_x64 arch/x86/entry/syscall_64.c:61 [inline] do_syscall_64+0x166/0x520 arch/x86/entry/syscall_64.c:84 entry_SYSCALL_64_after_hwframe+0x77/0x7f -> #1 (&mm->mmap_lock){++++}-{4:4}: down_read_killable+0x50/0x3b0 kernel/locking/rwsem.c:1599 mmap_read_lock_killable+0x1d/0x70 include/linux/mmap_lock.h:609 get_mmap_lock_carefully mm/mmap_lock.c:450 [inline] lock_mm_and_find_vma+0x2d6/0x340 mm/mmap_lock.c:501 do_user_addr_fault+0x343/0x1340 arch/x86/mm/fault.c:1366 handle_page_fault arch/x86/mm/fault.c:1483 [inline] exc_page_fault+0x6a/0xc0 arch/x86/mm/fault.c:1536 asm_exc_page_fault+0x26/0x30 arch/x86/include/asm/idtentry.h:595 filldir64+0x2bc/0x620 fs/readdir.c:-1 dir_emit include/linux/fs.h:3608 [inline] ntfs_dir_emit fs/ntfs3/dir.c:388 [inline] ntfs_read_hdr+0x8a7/0xc10 fs/ntfs3/dir.c:429 ntfs_readdir+0x9a2/0xf60 fs/ntfs3/dir.c:589 iterate_dir+0x2e2/0x4d0 fs/readdir.c:110 __do_sys_getdents64 fs/readdir.c:399 [inline] __se_sys_getdents64+0xf1/0x280 fs/readdir.c:384 do_syscall_x64 arch/x86/entry/syscall_64.c:61 [inline] do_syscall_64+0x166/0x520 arch/x86/entry/syscall_64.c:84 entry_SYSCALL_64_after_hwframe+0x77/0x7f -> #0 (&ni->ni_lock/5){+.+.}-{4:4}: check_prev_add kernel/locking/lockdep.c:3181 [inline] check_prevs_add kernel/locking/lockdep.c:3300 [inline] validate_chain kernel/locking/lockdep.c:3924 [inline] __lock_acquire+0x1520/0x2cf0 kernel/locking/lockdep.c:5253 lock_acquire+0x106/0x350 kernel/locking/lockdep.c:5886 __mutex_lock_common kernel/locking/mutex.c:646 [inline] __mutex_lock+0x19d/0x1550 kernel/locking/mutex.c:821 ni_lock fs/ntfs3/ntfs_fs.h:1247 [inline] attr_data_get_block+0x1cd/0x2c0 fs/ntfs3/attrib.c:976 ntfs_iomap_begin+0x4f0/0xf30 fs/ntfs3/inode.c:978 iomap_iter_next include/linux/iomap.h:382 [inline] ntfs_iomap_next+0x5b6/0x880 fs/ntfs3/inode.c:2319 iomap_iter+0xe2/0xec0 fs/iomap/iter.c:122 iomap_read_folio+0x638/0x970 fs/iomap/buffered-io.c:675 ntfs_read_folio+0x3f1/0x4b0 fs/ntfs3/inode.c:856 filemap_read_folio+0x12c/0x3a0 mm/filemap.c:2520 filemap_fault+0xd06/0x13b0 mm/filemap.c:3689 __do_fault+0x138/0x2a0 mm/memory.c:5503 do_read_fault mm/memory.c:5938 [inline] do_fault mm/memory.c:6072 [inline] do_pte_missing+0x2215/0x34b0 mm/memory.c:4638 handle_pte_fault mm/memory.c:6496 [inline] __handle_mm_fault mm/memory.c:6645 [inline] handle_mm_fault+0x19f5/0x3720 mm/memory.c:6814 faultin_page mm/gup.c:1126 [inline] __get_user_pages+0x1675/0x2750 mm/gup.c:1428 populate_vma_page_range+0x2be/0x3c0 mm/gup.c:1860 __mm_populate+0x25f/0x390 mm/gup.c:1963 mm_populate include/linux/mm.h:4229 [inline] vm_mmap_pgoff+0x353/0x4e0 mm/util.c:586 ksys_mmap_pgoff+0x4dc/0x760 mm/mmap.c:619 do_syscall_x64 arch/x86/entry/syscall_64.c:61 [inline] do_syscall_64+0x166/0x520 arch/x86/entry/syscall_64.c:84 entry_SYSCALL_64_after_hwframe+0x77/0x7f other info that might help us debug this: Chain exists of: &ni->ni_lock/5 --> &mm->mmap_lock --> mapping.invalidate_lock#7 Possible unsafe locking scenario: CPU0 CPU1 ---- ---- rlock(mapping.invalidate_lock#7); lock(&mm->mmap_lock); lock(mapping.invalidate_lock#7); lock(&ni->ni_lock/5); *** DEADLOCK *** locks held by syz.6.1926/15662: 1, last CPU#0: #0: ffff8880478cd2d8 (mapping.invalidate_lock#7){.+.+}-{4:4}, at: filemap_invalidate_lock_shared include/linux/fs.h:1090 [inline] #0: ffff8880478cd2d8 (mapping.invalidate_lock#7){.+.+}-{4:4}, at: filemap_fault+0x6d7/0x13b0 mm/filemap.c:3585 stack backtrace: CPU: 0 UID: 0 PID: 15662 Comm: syz.6.1926 Tainted: G L syzkaller #0 PREEMPT(full) Tainted: [L]=SOFTLOCKUP Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/16/2026 Call Trace: dump_stack_lvl+0xe8/0x150 lib/dump_stack.c:120 print_circular_bug+0x2e1/0x300 kernel/locking/lockdep.c:2059 check_noncircular+0x12e/0x150 kernel/locking/lockdep.c:2191 check_prev_add kernel/locking/lockdep.c:3181 [inline] check_prevs_add kernel/locking/lockdep.c:3300 [inline] validate_chain kernel/locking/lockdep.c:3924 [inline] __lock_acquire+0x1520/0x2cf0 kernel/locking/lockdep.c:5253 lock_acquire+0x106/0x350 kernel/locking/lockdep.c:5886 __mutex_lock_common kernel/locking/mutex.c:646 [inline] __mutex_lock+0x19d/0x1550 kernel/locking/mutex.c:821 ni_lock fs/ntfs3/ntfs_fs.h:1247 [inline] attr_data_get_block+0x1cd/0x2c0 fs/ntfs3/attrib.c:976 ntfs_iomap_begin+0x4f0/0xf30 fs/ntfs3/inode.c:978 iomap_iter_next include/linux/iomap.h:382 [inline] ntfs_iomap_next+0x5b6/0x880 fs/ntfs3/inode.c:2319 iomap_iter+0xe2/0xec0 fs/iomap/iter.c:122 iomap_read_folio+0x638/0x970 fs/iomap/buffered-io.c:675 ntfs_read_folio+0x3f1/0x4b0 fs/ntfs3/inode.c:856 filemap_read_folio+0x12c/0x3a0 mm/filemap.c:2520 filemap_fault+0xd06/0x13b0 mm/filemap.c:3689 __do_fault+0x138/0x2a0 mm/memory.c:5503 do_read_fault mm/memory.c:5938 [inline] do_fault mm/memory.c:6072 [inline] do_pte_missing+0x2215/0x34b0 mm/memory.c:4638 handle_pte_fault mm/memory.c:6496 [inline] __handle_mm_fault mm/memory.c:6645 [inline] handle_mm_fault+0x19f5/0x3720 mm/memory.c:6814 faultin_page mm/gup.c:1126 [inline] __get_user_pages+0x1675/0x2750 mm/gup.c:1428 populate_vma_page_range+0x2be/0x3c0 mm/gup.c:1860 __mm_populate+0x25f/0x390 mm/gup.c:1963 mm_populate include/linux/mm.h:4229 [inline] vm_mmap_pgoff+0x353/0x4e0 mm/util.c:586 ksys_mmap_pgoff+0x4dc/0x760 mm/mmap.c:619 do_syscall_x64 arch/x86/entry/syscall_64.c:61 [inline] do_syscall_64+0x166/0x520 arch/x86/entry/syscall_64.c:84 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7fcb2119e0d9 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:00007fcb2208e028 EFLAGS: 00000246 ORIG_RAX: 0000000000000009 RAX: ffffffffffffffda RBX: 00007fcb21425fa0 RCX: 00007fcb2119e0d9 RDX: 00000000027ffff7 RSI: 0000000000600000 RDI: 0000200000000000 RBP: 00007fcb21235024 R08: 0000000000000004 R09: 0000000000000000 R10: 0000000004012011 R11: 0000000000000246 R12: 0000000000000000 R13: 00007fcb21426038 R14: 00007fcb21425fa0 R15: 00007fffaa7a79c8