loop5: detected capacity change from 0 to 4096 ====================================================== WARNING: possible circular locking dependency detected syzkaller #0 Not tainted ------------------------------------------------------ syz.5.11537/5084 is trying to acquire lock: ffff88807213c7a0 (mapping.invalidate_lock#9){++++}-{3:3}, at: filemap_invalidate_lock_shared include/linux/fs.h:813 [inline] ffff88807213c7a0 (mapping.invalidate_lock#9){++++}-{3:3}, at: filemap_fault+0x62b/0x1590 mm/filemap.c:3247 but task is already holding lock: ffff88801746f958 (&mm->mmap_lock){++++}-{3:3}, at: mmap_read_lock include/linux/mmap_lock.h:117 [inline] ffff88801746f958 (&mm->mmap_lock){++++}-{3:3}, at: __mm_populate+0x17f/0x380 mm/gup.c:1700 which lock already depends on the new lock. the existing dependency chain (in reverse order) is: -> #2 (&mm->mmap_lock){++++}-{3:3}: __might_fault+0xc2/0x120 mm/memory.c:5850 _copy_to_user+0x27/0x130 lib/usercopy.c:36 copy_to_user include/linux/uaccess.h:169 [inline] ni_fiemap+0x1142/0x1370 fs/ntfs3/frecord.c:2142 ntfs_fiemap+0xd7/0x130 fs/ntfs3/file.c:1177 ioctl_fiemap fs/ioctl.c:219 [inline] do_vfs_ioctl+0x1414/0x1d40 fs/ioctl.c:810 __do_sys_ioctl fs/ioctl.c:868 [inline] __se_sys_ioctl+0x83/0x170 fs/ioctl.c:856 do_syscall_x64 arch/x86/entry/common.c:46 [inline] do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:76 entry_SYSCALL_64_after_hwframe+0x68/0xd2 -> #1 (&ni->ni_lock/5){+.+.}-{3:3}: __mutex_lock_common kernel/locking/mutex.c:603 [inline] __mutex_lock+0x12d/0xae0 kernel/locking/mutex.c:747 ni_lock fs/ntfs3/ntfs_fs.h:1103 [inline] ntfs_fallocate+0x73a/0x1030 fs/ntfs3/file.c:570 vfs_fallocate+0x57b/0x6f0 fs/open.c:323 ksys_fallocate fs/open.c:346 [inline] __do_sys_fallocate fs/open.c:354 [inline] __se_sys_fallocate fs/open.c:352 [inline] __x64_sys_fallocate+0xbd/0x100 fs/open.c:352 do_syscall_x64 arch/x86/entry/common.c:46 [inline] do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:76 entry_SYSCALL_64_after_hwframe+0x68/0xd2 -> #0 (mapping.invalidate_lock#9){++++}-{3:3}: check_prev_add kernel/locking/lockdep.c:3095 [inline] check_prevs_add kernel/locking/lockdep.c:3214 [inline] validate_chain kernel/locking/lockdep.c:3830 [inline] __lock_acquire+0x2d18/0x7c40 kernel/locking/lockdep.c:5063 lock_acquire+0x1bb/0x4a0 kernel/locking/lockdep.c:5676 down_read+0x42/0x2d0 kernel/locking/rwsem.c:1520 filemap_invalidate_lock_shared include/linux/fs.h:813 [inline] filemap_fault+0x62b/0x1590 mm/filemap.c:3247 __do_fault+0x13b/0x4e0 mm/memory.c:4278 do_read_fault mm/memory.c:4629 [inline] do_fault mm/memory.c:4758 [inline] handle_pte_fault mm/memory.c:5029 [inline] __handle_mm_fault mm/memory.c:5171 [inline] handle_mm_fault+0x2610/0x3d40 mm/memory.c:5292 faultin_page mm/gup.c:1026 [inline] __get_user_pages+0x40d/0xec0 mm/gup.c:1250 populate_vma_page_range+0x214/0x2b0 mm/gup.c:1607 __mm_populate+0x25c/0x380 mm/gup.c:1721 mm_populate include/linux/mm.h:2891 [inline] vm_mmap_pgoff+0x212/0x2d0 mm/util.c:525 ksys_mmap_pgoff+0x4bf/0x720 mm/mmap.c:1482 do_syscall_x64 arch/x86/entry/common.c:46 [inline] do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:76 entry_SYSCALL_64_after_hwframe+0x68/0xd2 other info that might help us debug this: Chain exists of: mapping.invalidate_lock#9 --> &ni->ni_lock/5 --> &mm->mmap_lock Possible unsafe locking scenario: CPU0 CPU1 ---- ---- lock(&mm->mmap_lock); lock(&ni->ni_lock/5); lock(&mm->mmap_lock); lock(mapping.invalidate_lock#9); *** DEADLOCK *** 1 lock held by syz.5.11537/5084: #0: ffff88801746f958 (&mm->mmap_lock){++++}-{3:3}, at: mmap_read_lock include/linux/mmap_lock.h:117 [inline] #0: ffff88801746f958 (&mm->mmap_lock){++++}-{3:3}, at: __mm_populate+0x17f/0x380 mm/gup.c:1700 stack backtrace: CPU: 0 PID: 5084 Comm: syz.5.11537 Not tainted syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/16/2026 Call Trace: dump_stack_lvl+0x188/0x24e lib/dump_stack.c:106 check_noncircular+0x296/0x330 kernel/locking/lockdep.c:2170 check_prev_add kernel/locking/lockdep.c:3095 [inline] check_prevs_add kernel/locking/lockdep.c:3214 [inline] validate_chain kernel/locking/lockdep.c:3830 [inline] __lock_acquire+0x2d18/0x7c40 kernel/locking/lockdep.c:5063 lock_acquire+0x1bb/0x4a0 kernel/locking/lockdep.c:5676 down_read+0x42/0x2d0 kernel/locking/rwsem.c:1520 filemap_invalidate_lock_shared include/linux/fs.h:813 [inline] filemap_fault+0x62b/0x1590 mm/filemap.c:3247 __do_fault+0x13b/0x4e0 mm/memory.c:4278 do_read_fault mm/memory.c:4629 [inline] do_fault mm/memory.c:4758 [inline] handle_pte_fault mm/memory.c:5029 [inline] __handle_mm_fault mm/memory.c:5171 [inline] handle_mm_fault+0x2610/0x3d40 mm/memory.c:5292 faultin_page mm/gup.c:1026 [inline] __get_user_pages+0x40d/0xec0 mm/gup.c:1250 populate_vma_page_range+0x214/0x2b0 mm/gup.c:1607 __mm_populate+0x25c/0x380 mm/gup.c:1721 mm_populate include/linux/mm.h:2891 [inline] vm_mmap_pgoff+0x212/0x2d0 mm/util.c:525 ksys_mmap_pgoff+0x4bf/0x720 mm/mmap.c:1482 do_syscall_x64 arch/x86/entry/common.c:46 [inline] do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:76 entry_SYSCALL_64_after_hwframe+0x68/0xd2 RIP: 0033:0x7faa7779de99 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:00007faa7873f028 EFLAGS: 00000246 ORIG_RAX: 0000000000000009 RAX: ffffffffffffffda RBX: 00007faa77a25fa0 RCX: 00007faa7779de99 RDX: 0000000000000002 RSI: 0000000000b36000 RDI: 0000200000000000 RBP: 00007faa77833eaf R08: 0000000000000004 R09: 0000000000000000 R10: 0000000000028011 R11: 0000000000000246 R12: 0000000000000000 R13: 00007faa77a26038 R14: 00007faa77a25fa0 R15: 00007fffee223d78