loop7: detected capacity change from 0 to 4096 ntfs3(loop7): ino=1f, mi_enum_attr gadgetfs: Unknown parameter '^][+'#' ====================================================== WARNING: possible circular locking dependency detected syzkaller #0 Not tainted ------------------------------------------------------ syz.7.1753/23365 is trying to acquire lock: ffff888067b84aa8 (mapping.invalidate_lock#12){++++}-{4:4}, at: filemap_invalidate_lock_shared include/linux/fs.h:1092 [inline] ffff888067b84aa8 (mapping.invalidate_lock#12){++++}-{4:4}, at: filemap_fault+0x66f/0x12f0 mm/filemap.c:3537 but task is already holding lock: ffff88803a8269b0 (&mm->mmap_lock){++++}-{4:4}, at: mmap_read_trylock include/linux/mmap_lock.h:410 [inline] ffff88803a8269b0 (&mm->mmap_lock){++++}-{4:4}, at: get_mmap_lock_carefully mm/mmap_lock.c:390 [inline] ffff88803a8269b0 (&mm->mmap_lock){++++}-{4:4}, at: lock_mm_and_find_vma+0x32/0x2f0 mm/mmap_lock.c:450 which lock already depends on the new lock. the existing dependency chain (in reverse order) is: -> #2 (&mm->mmap_lock){++++}-{4:4}: __might_fault+0xcb/0x130 mm/memory.c:7174 _inline_copy_to_user include/linux/uaccess.h:201 [inline] _copy_to_user+0x2c/0xb0 lib/usercopy.c:26 copy_to_user include/linux/uaccess.h:236 [inline] fiemap_fill_next_extent+0x1dd/0x3c0 fs/ioctl.c:144 ni_fiemap+0x3c2/0xca0 fs/ntfs3/frecord.c:1898 ntfs_fiemap+0x11d/0x1a0 fs/ntfs3/file.c:1419 ioctl_fiemap fs/ioctl.c:219 [inline] do_vfs_ioctl+0x126f/0x1540 fs/ioctl.c:531 __do_sys_ioctl fs/ioctl.c:595 [inline] __se_sys_ioctl+0x82/0x170 fs/ioctl.c:583 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xe2/0xf80 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f -> #1 (&ni->ni_lock/5){+.+.}-{4:4}: __mutex_lock_common kernel/locking/rtmutex_api.c:533 [inline] mutex_lock_nested+0x5a/0x1d0 kernel/locking/rtmutex_api.c:552 ni_lock fs/ntfs3/ntfs_fs.h:1127 [inline] ntfs_fallocate+0x5a6/0x1140 fs/ntfs3/file.c:634 vfs_fallocate+0x672/0x7f0 fs/open.c:339 ksys_fallocate fs/open.c:363 [inline] __do_sys_fallocate fs/open.c:368 [inline] __se_sys_fallocate fs/open.c:366 [inline] __x64_sys_fallocate+0xc0/0x110 fs/open.c:366 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xe2/0xf80 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f -> #0 (mapping.invalidate_lock#12){++++}-{4:4}: check_prev_add kernel/locking/lockdep.c:3165 [inline] check_prevs_add kernel/locking/lockdep.c:3284 [inline] validate_chain kernel/locking/lockdep.c:3908 [inline] __lock_acquire+0x15a5/0x2cf0 kernel/locking/lockdep.c:5237 lock_acquire+0x106/0x330 kernel/locking/lockdep.c:5868 down_read+0x97/0x200 kernel/locking/rwsem.c:1537 filemap_invalidate_lock_shared include/linux/fs.h:1092 [inline] filemap_fault+0x66f/0x12f0 mm/filemap.c:3537 __do_fault+0x138/0x390 mm/memory.c:5320 do_read_fault mm/memory.c:5755 [inline] do_fault mm/memory.c:5889 [inline] do_pte_missing+0x18c5/0x27a0 mm/memory.c:4401 handle_pte_fault mm/memory.c:6273 [inline] __handle_mm_fault mm/memory.c:6411 [inline] handle_mm_fault+0xd0a/0x13c0 mm/memory.c:6580 do_user_addr_fault+0x75b/0x1360 arch/x86/mm/fault.c:1387 handle_page_fault arch/x86/mm/fault.c:1476 [inline] exc_page_fault+0x6a/0xc0 arch/x86/mm/fault.c:1532 asm_exc_page_fault+0x26/0x30 arch/x86/include/asm/idtentry.h:618 fault_in_readable+0x8e/0x130 mm/gup.c:-1 fault_in_iov_iter_readable+0x1b4/0x2f0 lib/iov_iter.c:106 generic_perform_write+0x765/0x8b0 mm/filemap.c:4363 ntfs_file_write_iter+0x74b/0x870 fs/ntfs3/file.c:1318 new_sync_write fs/read_write.c:593 [inline] vfs_write+0x629/0xba0 fs/read_write.c:686 ksys_pwrite64 fs/read_write.c:793 [inline] __do_sys_pwrite64 fs/read_write.c:801 [inline] __se_sys_pwrite64 fs/read_write.c:798 [inline] __x64_sys_pwrite64+0x19c/0x230 fs/read_write.c:798 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xe2/0xf80 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: mapping.invalidate_lock#12 --> &ni->ni_lock/5 --> &mm->mmap_lock Possible unsafe locking scenario: CPU0 CPU1 ---- ---- rlock(&mm->mmap_lock); lock(&ni->ni_lock/5); lock(&mm->mmap_lock); rlock(mapping.invalidate_lock#12); *** DEADLOCK *** 3 locks held by syz.7.1753/23365: #0: ffff88805d5ca480 (sb_writers#21){.+.+}-{0:0}, at: file_start_write include/linux/fs.h:2681 [inline] #0: ffff88805d5ca480 (sb_writers#21){.+.+}-{0:0}, at: vfs_write+0x22d/0xba0 fs/read_write.c:682 #1: ffff888067b848d8 (&sb->s_type->i_mutex_key#28){+.+.}-{4:4}, at: inode_trylock include/linux/fs.h:1057 [inline] #1: ffff888067b848d8 (&sb->s_type->i_mutex_key#28){+.+.}-{4:4}, at: ntfs_file_write_iter+0x7d/0x870 fs/ntfs3/file.c:1281 #2: ffff88803a8269b0 (&mm->mmap_lock){++++}-{4:4}, at: mmap_read_trylock include/linux/mmap_lock.h:410 [inline] #2: ffff88803a8269b0 (&mm->mmap_lock){++++}-{4:4}, at: get_mmap_lock_carefully mm/mmap_lock.c:390 [inline] #2: ffff88803a8269b0 (&mm->mmap_lock){++++}-{4:4}, at: lock_mm_and_find_vma+0x32/0x2f0 mm/mmap_lock.c:450 stack backtrace: CPU: 1 UID: 0 PID: 23365 Comm: syz.7.1753 Not tainted syzkaller #0 PREEMPT_{RT,(full)} Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/25/2025 Call Trace: dump_stack_lvl+0xe8/0x150 lib/dump_stack.c:120 print_circular_bug+0x2e1/0x300 kernel/locking/lockdep.c:2043 check_noncircular+0x12e/0x150 kernel/locking/lockdep.c:2175 check_prev_add kernel/locking/lockdep.c:3165 [inline] check_prevs_add kernel/locking/lockdep.c:3284 [inline] validate_chain kernel/locking/lockdep.c:3908 [inline] __lock_acquire+0x15a5/0x2cf0 kernel/locking/lockdep.c:5237 lock_acquire+0x106/0x330 kernel/locking/lockdep.c:5868 down_read+0x97/0x200 kernel/locking/rwsem.c:1537 filemap_invalidate_lock_shared include/linux/fs.h:1092 [inline] filemap_fault+0x66f/0x12f0 mm/filemap.c:3537 __do_fault+0x138/0x390 mm/memory.c:5320 do_read_fault mm/memory.c:5755 [inline] do_fault mm/memory.c:5889 [inline] do_pte_missing+0x18c5/0x27a0 mm/memory.c:4401 handle_pte_fault mm/memory.c:6273 [inline] __handle_mm_fault mm/memory.c:6411 [inline] handle_mm_fault+0xd0a/0x13c0 mm/memory.c:6580 do_user_addr_fault+0x75b/0x1360 arch/x86/mm/fault.c:1387 handle_page_fault arch/x86/mm/fault.c:1476 [inline] exc_page_fault+0x6a/0xc0 arch/x86/mm/fault.c:1532 asm_exc_page_fault+0x26/0x30 arch/x86/include/asm/idtentry.h:618 RIP: 0010:fault_in_readable+0x8e/0x130 mm/gup.c:2161 Code: a9 00 00 00 0f 01 cb 0f ae e8 4d 85 f6 40 0f 95 c5 4c 89 ff 4c 89 f6 e8 a0 f7 b7 ff 4d 39 f7 0f 97 c0 40 84 c5 74 43 4d 89 f5 <41> 8a 45 00 88 44 24 07 49 81 e5 00 f0 ff ff 4d 8d a5 00 10 00 00 RSP: 0018:ffffc900041d7a88 EFLAGS: 00050202 RAX: ffffffff82096701 RBX: 00000000000002c4 RCX: ffff888030e28000 RDX: 0000000000000002 RSI: 0000200000002000 RDI: 00002000000022c4 RBP: dffffc0000000001 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000100 R11: 0000000000000001 R12: 00007ffffffff000 R13: 0000200000002000 R14: 0000200000002000 R15: 00002000000022c4 fault_in_iov_iter_readable+0x1b4/0x2f0 lib/iov_iter.c:106 generic_perform_write+0x765/0x8b0 mm/filemap.c:4363 ntfs_file_write_iter+0x74b/0x870 fs/ntfs3/file.c:1318 new_sync_write fs/read_write.c:593 [inline] vfs_write+0x629/0xba0 fs/read_write.c:686 ksys_pwrite64 fs/read_write.c:793 [inline] __do_sys_pwrite64 fs/read_write.c:801 [inline] __se_sys_pwrite64 fs/read_write.c:798 [inline] __x64_sys_pwrite64+0x19c/0x230 fs/read_write.c:798 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xe2/0xf80 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f609ea6acb9 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:00007f609ccc6028 EFLAGS: 00000246 ORIG_RAX: 0000000000000012 RAX: ffffffffffffffda RBX: 00007f609ece5fa0 RCX: 00007f609ea6acb9 RDX: 000000000000fdef RSI: 0000200000000140 RDI: 0000000000000005 RBP: 00007f609ead8bf7 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000e7c R11: 0000000000000246 R12: 0000000000000000 R13: 00007f609ece6038 R14: 00007f609ece5fa0 R15: 00007ffcbed9dff8 ---------------- Code disassembly (best guess): 0: a9 00 00 00 0f test $0xf000000,%eax 5: 01 cb add %ecx,%ebx 7: 0f ae e8 lfence a: 4d 85 f6 test %r14,%r14 d: 40 0f 95 c5 setne %bpl 11: 4c 89 ff mov %r15,%rdi 14: 4c 89 f6 mov %r14,%rsi 17: e8 a0 f7 b7 ff call 0xffb7f7bc 1c: 4d 39 f7 cmp %r14,%r15 1f: 0f 97 c0 seta %al 22: 40 84 c5 test %al,%bpl 25: 74 43 je 0x6a 27: 4d 89 f5 mov %r14,%r13 * 2a: 41 8a 45 00 mov 0x0(%r13),%al <-- trapping instruction 2e: 88 44 24 07 mov %al,0x7(%rsp) 32: 49 81 e5 00 f0 ff ff and $0xfffffffffffff000,%r13 39: 4d 8d a5 00 10 00 00 lea 0x1000(%r13),%r12