====================================================== WARNING: possible circular locking dependency detected 6.16.0-rc3-syzkaller-00190-g67a993863163 #0 Not tainted ------------------------------------------------------ syz.6.1678/12673 is trying to acquire lock: ffff88807a13b8a0 (mapping.invalidate_lock#6){++++}-{4:4}, at: filemap_invalidate_lock_shared include/linux/fs.h:934 [inline] ffff88807a13b8a0 (mapping.invalidate_lock#6){++++}-{4:4}, at: filemap_fault+0x546/0x1200 mm/filemap.c:3400 but task is already holding lock: ffff888031ad4260 (&mm->mmap_lock){++++}-{4:4}, at: mmap_read_lock_killable include/linux/mmap_lock.h:421 [inline] ffff888031ad4260 (&mm->mmap_lock){++++}-{4:4}, at: __get_user_pages_locked mm/gup.c:1809 [inline] ffff888031ad4260 (&mm->mmap_lock){++++}-{4:4}, at: __gup_longterm_locked+0x1005/0x15b0 mm/gup.c:2512 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:5871 __might_fault+0xcc/0x130 mm/memory.c:6971 _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+0x89c/0xbf0 fs/ntfs3/frecord.c:2007 ntfs_fiemap+0xda/0x130 fs/ntfs3/file.c:1290 ioctl_fiemap fs/ioctl.c:220 [inline] do_vfs_ioctl+0x16d3/0x1990 fs/ioctl.c:841 __do_sys_ioctl fs/ioctl.c:905 [inline] __se_sys_ioctl+0x82/0x170 fs/ioctl.c:893 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xfa/0x3b0 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f -> #1 (&ni->ni_lock/5){+.+.}-{4:4}: lock_acquire+0x120/0x360 kernel/locking/lockdep.c:5871 __mutex_lock_common kernel/locking/mutex.c:602 [inline] __mutex_lock+0x182/0xe80 kernel/locking/mutex.c:747 ni_lock fs/ntfs3/ntfs_fs.h:1100 [inline] ntfs_fallocate+0x8e6/0x10b0 fs/ntfs3/file.c:618 vfs_fallocate+0x6a3/0x830 fs/open.c:341 ksys_fallocate fs/open.c:365 [inline] __do_sys_fallocate fs/open.c:370 [inline] __se_sys_fallocate fs/open.c:368 [inline] __x64_sys_fallocate+0xc0/0x110 fs/open.c:368 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xfa/0x3b0 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f -> #0 (mapping.invalidate_lock#6){++++}-{4:4}: check_prev_add kernel/locking/lockdep.c:3168 [inline] check_prevs_add kernel/locking/lockdep.c:3287 [inline] validate_chain+0xb9b/0x2140 kernel/locking/lockdep.c:3911 __lock_acquire+0xab9/0xd20 kernel/locking/lockdep.c:5240 lock_acquire+0x120/0x360 kernel/locking/lockdep.c:5871 down_read+0x46/0x2e0 kernel/locking/rwsem.c:1524 filemap_invalidate_lock_shared include/linux/fs.h:934 [inline] filemap_fault+0x546/0x1200 mm/filemap.c:3400 __do_fault+0x138/0x390 mm/memory.c:5169 do_read_fault mm/memory.c:5590 [inline] do_fault mm/memory.c:5724 [inline] do_pte_missing mm/memory.c:4251 [inline] handle_pte_fault mm/memory.c:6069 [inline] __handle_mm_fault+0x37ed/0x5620 mm/memory.c:6212 handle_mm_fault+0x40a/0x8e0 mm/memory.c:6381 faultin_page mm/gup.c:1186 [inline] __get_user_pages+0x1af4/0x30b0 mm/gup.c:1488 __get_user_pages_locked mm/gup.c:1754 [inline] __gup_longterm_locked+0x118a/0x15b0 mm/gup.c:2512 gup_fast_fallback+0x1cd4/0x2260 mm/gup.c:3363 iov_iter_extract_user_pages lib/iov_iter.c:1846 [inline] iov_iter_extract_pages+0x35a/0x5e0 lib/iov_iter.c:1909 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+0x114f/0x33d0 fs/direct-io.c:1243 blockdev_direct_IO include/linux/fs.h:3477 [inline] ntfs_direct_IO+0x20b/0x410 fs/ntfs3/inode.c:813 generic_file_direct_write+0x1db/0x3e0 mm/filemap.c:4046 __generic_file_write_iter+0x11d/0x230 mm/filemap.c:4215 ntfs_file_write_iter+0x71c/0x820 fs/ntfs3/file.c:1197 do_iter_readv_writev+0x56e/0x7f0 fs/read_write.c:-1 vfs_writev+0x31a/0x960 fs/read_write.c:1057 do_pwritev fs/read_write.c:1153 [inline] __do_sys_pwritev2 fs/read_write.c:1211 [inline] __se_sys_pwritev2+0x179/0x290 fs/read_write.c:1202 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xfa/0x3b0 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#6 --> &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#6); *** DEADLOCK *** 3 locks held by syz.6.1678/12673: #0: ffff88806a122428 (sb_writers#27){.+.+}-{0:0}, at: file_start_write include/linux/fs.h:3096 [inline] #0: ffff88806a122428 (sb_writers#27){.+.+}-{0:0}, at: vfs_writev+0x288/0x960 fs/read_write.c:1055 #1: ffff88807a13b700 (&sb->s_type->i_mutex_key#34){+.+.}-{4:4}, at: inode_trylock include/linux/fs.h:899 [inline] #1: ffff88807a13b700 (&sb->s_type->i_mutex_key#34){+.+.}-{4:4}, at: ntfs_file_write_iter+0x78/0x820 fs/ntfs3/file.c:1160 #2: ffff888031ad4260 (&mm->mmap_lock){++++}-{4:4}, at: mmap_read_lock_killable include/linux/mmap_lock.h:421 [inline] #2: ffff888031ad4260 (&mm->mmap_lock){++++}-{4:4}, at: __get_user_pages_locked mm/gup.c:1809 [inline] #2: ffff888031ad4260 (&mm->mmap_lock){++++}-{4:4}, at: __gup_longterm_locked+0x1005/0x15b0 mm/gup.c:2512 stack backtrace: CPU: 0 UID: 0 PID: 12673 Comm: syz.6.1678 Not tainted 6.16.0-rc3-syzkaller-00190-g67a993863163 #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:2046 check_noncircular+0x134/0x160 kernel/locking/lockdep.c:2178 check_prev_add kernel/locking/lockdep.c:3168 [inline] check_prevs_add kernel/locking/lockdep.c:3287 [inline] validate_chain+0xb9b/0x2140 kernel/locking/lockdep.c:3911 __lock_acquire+0xab9/0xd20 kernel/locking/lockdep.c:5240 lock_acquire+0x120/0x360 kernel/locking/lockdep.c:5871 down_read+0x46/0x2e0 kernel/locking/rwsem.c:1524 filemap_invalidate_lock_shared include/linux/fs.h:934 [inline] filemap_fault+0x546/0x1200 mm/filemap.c:3400 __do_fault+0x138/0x390 mm/memory.c:5169 do_read_fault mm/memory.c:5590 [inline] do_fault mm/memory.c:5724 [inline] do_pte_missing mm/memory.c:4251 [inline] handle_pte_fault mm/memory.c:6069 [inline] __handle_mm_fault+0x37ed/0x5620 mm/memory.c:6212 handle_mm_fault+0x40a/0x8e0 mm/memory.c:6381 faultin_page mm/gup.c:1186 [inline] __get_user_pages+0x1af4/0x30b0 mm/gup.c:1488 __get_user_pages_locked mm/gup.c:1754 [inline] __gup_longterm_locked+0x118a/0x15b0 mm/gup.c:2512 gup_fast_fallback+0x1cd4/0x2260 mm/gup.c:3363 iov_iter_extract_user_pages lib/iov_iter.c:1846 [inline] iov_iter_extract_pages+0x35a/0x5e0 lib/iov_iter.c:1909 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+0x114f/0x33d0 fs/direct-io.c:1243 blockdev_direct_IO include/linux/fs.h:3477 [inline] ntfs_direct_IO+0x20b/0x410 fs/ntfs3/inode.c:813 generic_file_direct_write+0x1db/0x3e0 mm/filemap.c:4046 __generic_file_write_iter+0x11d/0x230 mm/filemap.c:4215 ntfs_file_write_iter+0x71c/0x820 fs/ntfs3/file.c:1197 do_iter_readv_writev+0x56e/0x7f0 fs/read_write.c:-1 vfs_writev+0x31a/0x960 fs/read_write.c:1057 do_pwritev fs/read_write.c:1153 [inline] __do_sys_pwritev2 fs/read_write.c:1211 [inline] __se_sys_pwritev2+0x179/0x290 fs/read_write.c:1202 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xfa/0x3b0 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f6a5818e929 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:00007f6a58fb1038 EFLAGS: 00000246 ORIG_RAX: 0000000000000148 RAX: ffffffffffffffda RBX: 00007f6a583b5fa0 RCX: 00007f6a5818e929 RDX: 0000000000000001 RSI: 0000200000000240 RDI: 0000000000000004 RBP: 00007f6a58210b39 R08: 0000000000000000 R09: 0000000000000003 R10: 0000000000002000 R11: 0000000000000246 R12: 0000000000000000 R13: 0000000000000000 R14: 00007f6a583b5fa0 R15: 00007ffd04afaeb8