====================================================== WARNING: possible circular locking dependency detected syzkaller #0 Not tainted ------------------------------------------------------ syz.6.1502/10621 is trying to acquire lock: ffff888059d4fb40 (mapping.invalidate_lock#7){.+.+}-{3:3}, at: filemap_invalidate_lock_shared include/linux/fs.h:842 [inline] ffff888059d4fb40 (mapping.invalidate_lock#7){.+.+}-{3:3}, at: filemap_fault+0x699/0x1370 mm/filemap.c:3081 but task is already holding lock: ffff88807d1d1d28 (&mm->mmap_lock){++++}-{3:3}, at: mmap_read_lock_killable include/linux/mmap_lock.h:126 [inline] ffff88807d1d1d28 (&mm->mmap_lock){++++}-{3:3}, at: __get_user_pages_locked mm/gup.c:1433 [inline] ffff88807d1d1d28 (&mm->mmap_lock){++++}-{3:3}, at: get_user_pages_unlocked+0x3c1/0x700 mm/gup.c:2222 which lock already depends on the new lock. the existing dependency chain (in reverse order) is: -> #3 (&mm->mmap_lock){++++}-{3:3}: __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:1240 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 -> #2 (&indx->run_lock){.+.+}-{3:3}: down_read+0x44/0x2e0 kernel/locking/rwsem.c:1498 indx_read+0x2b5/0xc90 fs/ntfs3/index.c:1066 indx_find+0x4db/0xd40 fs/ntfs3/index.c:1187 indx_insert_entry+0x505/0x720 fs/ntfs3/index.c:1958 ni_add_name+0x4d3/0x7f0 fs/ntfs3/frecord.c:3018 ntfs_link_inode+0x315/0x3d0 fs/ntfs3/inode.c:1718 ntfs_link+0x114/0x280 fs/ntfs3/namei.c:154 vfs_link+0x615/0x7c0 fs/namei.c:4565 do_linkat+0x285/0x860 fs/namei.c:4636 __do_sys_link fs/namei.c:4670 [inline] __se_sys_link fs/namei.c:4668 [inline] __x64_sys_link+0x82/0x90 fs/namei.c:4668 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 (&ni->ni_lock/5){+.+.}-{3:3}: __mutex_lock_common+0x1e3/0x2400 kernel/locking/mutex.c:596 __mutex_lock kernel/locking/mutex.c:729 [inline] mutex_lock_nested+0x17/0x20 kernel/locking/mutex.c:743 ni_lock fs/ntfs3/ntfs_fs.h:1100 [inline] ntfs_readpage+0x17c/0x200 fs/ntfs3/inode.c:727 filemap_read_page+0x17b/0x4c0 mm/filemap.c:2386 filemap_update_page mm/filemap.c:2464 [inline] filemap_get_pages mm/filemap.c:2574 [inline] filemap_read+0x146e/0x2540 mm/filemap.c:2634 call_read_iter include/linux/fs.h:2167 [inline] generic_file_splice_read+0x3ef/0x5f0 fs/splice.c:311 do_splice_to fs/splice.c:807 [inline] splice_direct_to_actor+0x423/0xc10 fs/splice.c:881 do_splice_direct+0x1d4/0x2f0 fs/splice.c:1008 do_sendfile+0x5fc/0xeb0 fs/read_write.c:1249 __do_sys_sendfile64 fs/read_write.c:1317 [inline] __se_sys_sendfile64+0x141/0x1a0 fs/read_write.c:1303 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 (mapping.invalidate_lock#7){.+.+}-{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 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_shared_fault mm/memory.c:4318 [inline] do_fault mm/memory.c:4396 [inline] handle_pte_fault mm/memory.c:4650 [inline] __handle_mm_fault mm/memory.c:4785 [inline] handle_mm_fault+0x1d19/0x4410 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_read_iter+0x2be/0x490 mm/filemap.c:2772 call_read_iter include/linux/fs.h:2167 [inline] new_sync_read fs/read_write.c:404 [inline] vfs_read+0x759/0xd60 fs/read_write.c:485 ksys_read+0x152/0x260 fs/read_write.c:623 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: mapping.invalidate_lock#7 --> &indx->run_lock --> &mm->mmap_lock Possible unsafe locking scenario: CPU0 CPU1 ---- ---- lock(&mm->mmap_lock); lock(&indx->run_lock); lock(&mm->mmap_lock); lock(mapping.invalidate_lock#7); *** DEADLOCK *** 3 locks held by syz.6.1502/10621: #0: ffff8880771c14f0 (&f->f_pos_lock){+.+.}-{3:3}, at: __fdget_pos+0x2bf/0x370 fs/file.c:1056 #1: ffff888059d4f9a0 (&sb->s_type->i_mutex_key#33){+.+.}-{3:3}, at: inode_lock include/linux/fs.h:787 [inline] #1: ffff888059d4f9a0 (&sb->s_type->i_mutex_key#33){+.+.}-{3:3}, at: do_blockdev_direct_IO fs/direct-io.c:1169 [inline] #1: ffff888059d4f9a0 (&sb->s_type->i_mutex_key#33){+.+.}-{3:3}, at: __blockdev_direct_IO+0x42f/0x3a70 fs/direct-io.c:1368 #2: ffff88807d1d1d28 (&mm->mmap_lock){++++}-{3:3}, at: mmap_read_lock_killable include/linux/mmap_lock.h:126 [inline] #2: ffff88807d1d1d28 (&mm->mmap_lock){++++}-{3:3}, at: __get_user_pages_locked mm/gup.c:1433 [inline] #2: ffff88807d1d1d28 (&mm->mmap_lock){++++}-{3:3}, at: get_user_pages_unlocked+0x3c1/0x700 mm/gup.c:2222 stack backtrace: CPU: 1 PID: 10621 Comm: syz.6.1502 Not tainted syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/18/2026 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 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_shared_fault mm/memory.c:4318 [inline] do_fault mm/memory.c:4396 [inline] handle_pte_fault mm/memory.c:4650 [inline] __handle_mm_fault mm/memory.c:4785 [inline] handle_mm_fault+0x1d19/0x4410 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_read_iter+0x2be/0x490 mm/filemap.c:2772 call_read_iter include/linux/fs.h:2167 [inline] new_sync_read fs/read_write.c:404 [inline] vfs_read+0x759/0xd60 fs/read_write.c:485 ksys_read+0x152/0x260 fs/read_write.c:623 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: 0033:0x7f3bbc018e59 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:00007f3bba272028 EFLAGS: 00000246 ORIG_RAX: 0000000000000000 RAX: ffffffffffffffda RBX: 00007f3bbc291fa0 RCX: 00007f3bbc018e59 RDX: 0000000000001000 RSI: 0000200000002400 RDI: 0000000000000004 RBP: 00007f3bbc0aed6f R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007f3bbc292038 R14: 00007f3bbc291fa0 R15: 00007ffc53022f98