====================================================== WARNING: possible circular locking dependency detected 6.15.0-syzkaller #0 Not tainted ------------------------------------------------------ syz.6.771/13751 is trying to acquire lock: ffff888052138c90 (mapping.invalidate_lock#7){++++}-{4:4}, at: filemap_invalidate_lock_shared include/linux/fs.h:922 [inline] ffff888052138c90 (mapping.invalidate_lock#7){++++}-{4:4}, at: filemap_fault+0x546/0x1200 mm/filemap.c:3391 but task is already holding lock: ffff8880278965e0 (&mm->mmap_lock){++++}-{4:4}, at: mmap_read_lock_killable include/linux/mmap_lock.h:193 [inline] ffff8880278965e0 (&mm->mmap_lock){++++}-{4:4}, at: __get_user_pages_locked mm/gup.c:1732 [inline] ffff8880278965e0 (&mm->mmap_lock){++++}-{4:4}, at: __gup_longterm_locked+0xbf7/0x15b0 mm/gup.c:2523 which lock already depends on the new lock. the existing dependency chain (in reverse order) is: -> #2 (&mm->mmap_lock){++++}-{4:4}: lock_acquire+0x120/0x360 kernel/locking/lockdep.c:5866 __might_fault+0xcc/0x130 mm/memory.c:7151 _inline_copy_to_user include/linux/uaccess.h:192 [inline] _copy_to_user+0x2c/0xb0 lib/usercopy.c:26 copy_to_user include/linux/uaccess.h:225 [inline] fiemap_fill_next_extent+0x1c0/0x390 fs/ioctl.c:145 ni_fiemap+0x391/0xbf0 fs/ntfs3/frecord.c:1896 ntfs_fiemap+0xda/0x130 fs/ntfs3/file.c:1380 ioctl_fiemap fs/ioctl.c:220 [inline] do_vfs_ioctl+0x1638/0x1eb0 fs/ioctl.c:840 __do_sys_ioctl fs/ioctl.c:904 [inline] __se_sys_ioctl+0x82/0x170 fs/ioctl.c:892 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xf6/0x210 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f -> #1 (&ni->ni_lock#2/5){+.+.}-{4:4}: lock_acquire+0x120/0x360 kernel/locking/lockdep.c:5866 __mutex_lock_common kernel/locking/mutex.c:601 [inline] __mutex_lock+0x182/0xe80 kernel/locking/mutex.c:746 ni_lock fs/ntfs3/ntfs_fs.h:1105 [inline] ntfs_fallocate+0x8e6/0x10b0 fs/ntfs3/file.c:703 vfs_fallocate+0x6a0/0x830 fs/open.c:338 ksys_fallocate fs/open.c:362 [inline] __do_sys_fallocate fs/open.c:367 [inline] __se_sys_fallocate fs/open.c:365 [inline] __x64_sys_fallocate+0xc0/0x110 fs/open.c:365 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xf6/0x210 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f -> #0 (mapping.invalidate_lock#7){++++}-{4:4}: check_prev_add kernel/locking/lockdep.c:3166 [inline] check_prevs_add kernel/locking/lockdep.c:3285 [inline] validate_chain+0xb9b/0x2140 kernel/locking/lockdep.c:3909 __lock_acquire+0xaac/0xd20 kernel/locking/lockdep.c:5235 lock_acquire+0x120/0x360 kernel/locking/lockdep.c:5866 down_read+0x46/0x2e0 kernel/locking/rwsem.c:1524 filemap_invalidate_lock_shared include/linux/fs.h:922 [inline] filemap_fault+0x546/0x1200 mm/filemap.c:3391 __do_fault+0x135/0x390 mm/memory.c:5098 do_shared_fault mm/memory.c:5582 [inline] do_fault mm/memory.c:5656 [inline] do_pte_missing mm/memory.c:4160 [inline] handle_pte_fault mm/memory.c:5997 [inline] __handle_mm_fault+0x17f9/0x5380 mm/memory.c:6140 handle_mm_fault+0x2d5/0x7f0 mm/memory.c:6309 faultin_page mm/gup.c:1193 [inline] __get_user_pages+0x16f0/0x2a40 mm/gup.c:1491 __get_user_pages_locked mm/gup.c:1757 [inline] __gup_longterm_locked+0xd66/0x15b0 mm/gup.c:2523 gup_fast_fallback+0x1843/0x1d60 mm/gup.c:3417 iov_iter_extract_user_pages lib/iov_iter.c:1849 [inline] iov_iter_extract_pages+0x35a/0x5e0 lib/iov_iter.c:1912 dio_refill_pages fs/direct-io.c:172 [inline] dio_get_page fs/direct-io.c:213 [inline] do_direct_IO fs/direct-io.c:915 [inline] __blockdev_direct_IO+0x10ed/0x3310 fs/direct-io.c:1243 blockdev_direct_IO include/linux/fs.h:3422 [inline] ntfs_direct_IO+0x195/0x3a0 fs/ntfs3/inode.c:809 generic_file_read_iter+0x31c/0x510 mm/filemap.c:2871 new_sync_read fs/read_write.c:489 [inline] vfs_read+0x4d0/0x980 fs/read_write.c:570 ksys_read+0x145/0x250 fs/read_write.c:713 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xf6/0x210 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#7 --> &ni->ni_lock#2/5 --> &mm->mmap_lock Possible unsafe locking scenario: CPU0 CPU1 ---- ---- rlock(&mm->mmap_lock); lock(&ni->ni_lock#2/5); lock(&mm->mmap_lock); rlock(mapping.invalidate_lock#7); *** DEADLOCK *** 3 locks held by syz.6.771/13751: #0: ffff8880399b17b8 (&f->f_pos_lock){+.+.}-{4:4}, at: fdget_pos+0x247/0x320 fs/file.c:1213 #1: ffff888052138af0 (&sb->s_type->i_mutex_key#35){+.+.}-{4:4}, at: inode_lock include/linux/fs.h:867 [inline] #1: ffff888052138af0 (&sb->s_type->i_mutex_key#35){+.+.}-{4:4}, at: __blockdev_direct_IO+0x318/0x3310 fs/direct-io.c:1140 #2: ffff8880278965e0 (&mm->mmap_lock){++++}-{4:4}, at: mmap_read_lock_killable include/linux/mmap_lock.h:193 [inline] #2: ffff8880278965e0 (&mm->mmap_lock){++++}-{4:4}, at: __get_user_pages_locked mm/gup.c:1732 [inline] #2: ffff8880278965e0 (&mm->mmap_lock){++++}-{4:4}, at: __gup_longterm_locked+0xbf7/0x15b0 mm/gup.c:2523 stack backtrace: CPU: 0 UID: 0 PID: 13751 Comm: syz.6.771 Not tainted 6.15.0-syzkaller #0 PREEMPT(full) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025 Call Trace: dump_stack_lvl+0x189/0x250 lib/dump_stack.c:120 print_circular_bug+0x2ee/0x310 kernel/locking/lockdep.c:2079 check_noncircular+0x134/0x160 kernel/locking/lockdep.c:2211 check_prev_add kernel/locking/lockdep.c:3166 [inline] check_prevs_add kernel/locking/lockdep.c:3285 [inline] validate_chain+0xb9b/0x2140 kernel/locking/lockdep.c:3909 __lock_acquire+0xaac/0xd20 kernel/locking/lockdep.c:5235 lock_acquire+0x120/0x360 kernel/locking/lockdep.c:5866 down_read+0x46/0x2e0 kernel/locking/rwsem.c:1524 filemap_invalidate_lock_shared include/linux/fs.h:922 [inline] filemap_fault+0x546/0x1200 mm/filemap.c:3391 __do_fault+0x135/0x390 mm/memory.c:5098 do_shared_fault mm/memory.c:5582 [inline] do_fault mm/memory.c:5656 [inline] do_pte_missing mm/memory.c:4160 [inline] handle_pte_fault mm/memory.c:5997 [inline] __handle_mm_fault+0x17f9/0x5380 mm/memory.c:6140 handle_mm_fault+0x2d5/0x7f0 mm/memory.c:6309 faultin_page mm/gup.c:1193 [inline] __get_user_pages+0x16f0/0x2a40 mm/gup.c:1491 __get_user_pages_locked mm/gup.c:1757 [inline] __gup_longterm_locked+0xd66/0x15b0 mm/gup.c:2523 gup_fast_fallback+0x1843/0x1d60 mm/gup.c:3417 iov_iter_extract_user_pages lib/iov_iter.c:1849 [inline] iov_iter_extract_pages+0x35a/0x5e0 lib/iov_iter.c:1912 dio_refill_pages fs/direct-io.c:172 [inline] dio_get_page fs/direct-io.c:213 [inline] do_direct_IO fs/direct-io.c:915 [inline] __blockdev_direct_IO+0x10ed/0x3310 fs/direct-io.c:1243 blockdev_direct_IO include/linux/fs.h:3422 [inline] ntfs_direct_IO+0x195/0x3a0 fs/ntfs3/inode.c:809 generic_file_read_iter+0x31c/0x510 mm/filemap.c:2871 new_sync_read fs/read_write.c:489 [inline] vfs_read+0x4d0/0x980 fs/read_write.c:570 ksys_read+0x145/0x250 fs/read_write.c:713 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xf6/0x210 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7ff97978e969 Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 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 a8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007ff97a6d1038 EFLAGS: 00000246 ORIG_RAX: 0000000000000000 RAX: ffffffffffffffda RBX: 00007ff9799b5fa0 RCX: 00007ff97978e969 RDX: 0000000000001000 RSI: 0000200000001400 RDI: 0000000000000005 RBP: 00007ff979810ab1 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 0000000000000000 R14: 00007ff9799b5fa0 R15: 00007ffc8691e8a8