syzbot

======================================================
WARNING: possible circular locking dependency detected
6.1.27-syzkaller #0 Not tainted
------------------------------------------------------
syz-executor.0/11630 is trying to acquire lock:
ffff888047eeaa20 (mapping.invalidate_lock#7){.+.+}-{3:3}, at: filemap_invalidate_lock_shared include/linux/fs.h:811 [inline]
ffff888047eeaa20 (mapping.invalidate_lock#7){.+.+}-{3:3}, at: filemap_fault+0x640/0x17e0 mm/filemap.c:3128

but task is already holding lock:
ffff88807837ae58 (&mm->mmap_lock#2){++++}-{3:3}, at: mmap_read_trylock include/linux/mmap_lock.h:136 [inline]
ffff88807837ae58 (&mm->mmap_lock#2){++++}-{3:3}, at: do_user_addr_fault arch/x86/mm/fault.c:1369 [inline]
ffff88807837ae58 (&mm->mmap_lock#2){++++}-{3:3}, at: handle_page_fault arch/x86/mm/fault.c:1519 [inline]
ffff88807837ae58 (&mm->mmap_lock#2){++++}-{3:3}, at: exc_page_fault+0x182/0x790 arch/x86/mm/fault.c:1575

which lock already depends on the new lock.


the existing dependency chain (in reverse order) is:

-> #2 (&mm->mmap_lock#2){++++}-{3:3}:
       lock_acquire+0x1f8/0x5a0 kernel/locking/lockdep.c:5669
       __might_fault+0xb2/0x110 mm/memory.c:5655
       _copy_to_user+0x26/0x130 lib/usercopy.c:36
       copy_to_user include/linux/uaccess.h:169 [inline]
       fiemap_fill_next_extent+0x231/0x410 fs/ioctl.c:144
       ni_fiemap+0x9ae/0x1230 fs/ntfs3/frecord.c:2039
       ntfs_fiemap+0x12e/0x170 fs/ntfs3/file.c:1245
       ioctl_fiemap fs/ioctl.c:219 [inline]
       do_vfs_ioctl+0x18e9/0x2a90 fs/ioctl.c:810
       __do_sys_ioctl fs/ioctl.c:868 [inline]
       __se_sys_ioctl+0x81/0x160 fs/ioctl.c:856
       do_syscall_x64 arch/x86/entry/common.c:50 [inline]
       do_syscall_64+0x3d/0xb0 arch/x86/entry/common.c:80
       entry_SYSCALL_64_after_hwframe+0x63/0xcd

-> #1 (&ni->file.run_lock#3){++++}-{3:3}:
       lock_acquire+0x1f8/0x5a0 kernel/locking/lockdep.c:5669
       down_read+0x39/0x50 kernel/locking/rwsem.c:1520
       attr_data_get_block+0x276/0x2520 fs/ntfs3/attrib.c:903
       ntfs_get_block_vbo+0x373/0xe60 fs/ntfs3/inode.c:580
       do_mpage_readpage+0x8d2/0x2040 fs/mpage.c:208
       mpage_readahead+0x450/0x920 fs/mpage.c:361
       read_pages+0x17f/0x830 mm/readahead.c:161
       page_cache_ra_unbounded+0x68b/0x7b0 mm/readahead.c:270
       filemap_readahead mm/filemap.c:2557 [inline]
       filemap_get_pages mm/filemap.c:2598 [inline]
       filemap_read+0xaad/0x31d0 mm/filemap.c:2676
       call_read_iter include/linux/fs.h:2199 [inline]
       generic_file_splice_read+0x23c/0x630 fs/splice.c:309
       do_splice_to fs/splice.c:793 [inline]
       splice_direct_to_actor+0x408/0xbd0 fs/splice.c:865
       do_splice_direct+0x27f/0x3c0 fs/splice.c:974
       do_sendfile+0x61c/0xff0 fs/read_write.c:1255
       __do_sys_sendfile64 fs/read_write.c:1323 [inline]
       __se_sys_sendfile64+0x178/0x1e0 fs/read_write.c:1309
       do_syscall_x64 arch/x86/entry/common.c:50 [inline]
       do_syscall_64+0x3d/0xb0 arch/x86/entry/common.c:80
       entry_SYSCALL_64_after_hwframe+0x63/0xcd

-> #0 (mapping.invalidate_lock#7){.+.+}-{3:3}:
       check_prev_add kernel/locking/lockdep.c:3098 [inline]
       check_prevs_add kernel/locking/lockdep.c:3217 [inline]
       validate_chain+0x1667/0x58e0 kernel/locking/lockdep.c:3832
       __lock_acquire+0x125b/0x1f80 kernel/locking/lockdep.c:5056
       lock_acquire+0x1f8/0x5a0 kernel/locking/lockdep.c:5669
       down_read+0x39/0x50 kernel/locking/rwsem.c:1520
       filemap_invalidate_lock_shared include/linux/fs.h:811 [inline]
       filemap_fault+0x640/0x17e0 mm/filemap.c:3128
       __do_fault+0x136/0x4f0 mm/memory.c:4212
       do_shared_fault mm/memory.c:4618 [inline]
       do_fault mm/memory.c:4696 [inline]
       handle_pte_fault mm/memory.c:4964 [inline]
       __handle_mm_fault mm/memory.c:5106 [inline]
       handle_mm_fault+0x2240/0x5330 mm/memory.c:5227
       do_user_addr_fault arch/x86/mm/fault.c:1428 [inline]
       handle_page_fault arch/x86/mm/fault.c:1519 [inline]
       exc_page_fault+0x58d/0x790 arch/x86/mm/fault.c:1575
       asm_exc_page_fault+0x22/0x30 arch/x86/include/asm/idtentry.h:570

other info that might help us debug this:

Chain exists of:
  mapping.invalidate_lock#7 --> &ni->file.run_lock#3 --> &mm->mmap_lock#2

 Possible unsafe locking scenario:

       CPU0                    CPU1
       ----                    ----
  lock(&mm->mmap_lock#2);
                               lock(&ni->file.run_lock#3);
                               lock(&mm->mmap_lock#2);
  lock(mapping.invalidate_lock#7);

 *** DEADLOCK ***

1 lock held by syz-executor.0/11630:
 #0: ffff88807837ae58 (&mm->mmap_lock#2){++++}-{3:3}, at: mmap_read_trylock include/linux/mmap_lock.h:136 [inline]
 #0: ffff88807837ae58 (&mm->mmap_lock#2){++++}-{3:3}, at: do_user_addr_fault arch/x86/mm/fault.c:1369 [inline]
 #0: ffff88807837ae58 (&mm->mmap_lock#2){++++}-{3:3}, at: handle_page_fault arch/x86/mm/fault.c:1519 [inline]
 #0: ffff88807837ae58 (&mm->mmap_lock#2){++++}-{3:3}, at: exc_page_fault+0x182/0x790 arch/x86/mm/fault.c:1575

stack backtrace:
CPU: 0 PID: 11630 Comm: syz-executor.0 Not tainted 6.1.27-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/14/2023
Call Trace:
 <TASK>
 __dump_stack lib/dump_stack.c:88 [inline]
 dump_stack_lvl+0x1e3/0x2cb lib/dump_stack.c:106
 check_noncircular+0x2fa/0x3b0 kernel/locking/lockdep.c:2178
 check_prev_add kernel/locking/lockdep.c:3098 [inline]
 check_prevs_add kernel/locking/lockdep.c:3217 [inline]
 validate_chain+0x1667/0x58e0 kernel/locking/lockdep.c:3832
 __lock_acquire+0x125b/0x1f80 kernel/locking/lockdep.c:5056
 lock_acquire+0x1f8/0x5a0 kernel/locking/lockdep.c:5669
 down_read+0x39/0x50 kernel/locking/rwsem.c:1520
 filemap_invalidate_lock_shared include/linux/fs.h:811 [inline]
 filemap_fault+0x640/0x17e0 mm/filemap.c:3128
 __do_fault+0x136/0x4f0 mm/memory.c:4212
 do_shared_fault mm/memory.c:4618 [inline]
 do_fault mm/memory.c:4696 [inline]
 handle_pte_fault mm/memory.c:4964 [inline]
 __handle_mm_fault mm/memory.c:5106 [inline]
 handle_mm_fault+0x2240/0x5330 mm/memory.c:5227
 do_user_addr_fault arch/x86/mm/fault.c:1428 [inline]
 handle_page_fault arch/x86/mm/fault.c:1519 [inline]
 exc_page_fault+0x58d/0x790 arch/x86/mm/fault.c:1575
 asm_exc_page_fault+0x22/0x30 arch/x86/include/asm/idtentry.h:570
RIP: 0033:0x7fc65042bde9
Code: 48 8b 04 24 48 85 c0 74 17 48 8b 54 24 18 48 0f ca 48 89 54 24 18 48 83 f8 01 0f 85 9b 02 00 00 48 8b 44 24 10 48 8b 54 24 18 <48> 89 10 e9 c2 fd ff ff 48 8b 44 24 10 0f b7 10 48 8b 04 24 48 85
RSP: 002b:00007ffe2070ba80 EFLAGS: 00010246
RAX: 0000000020000400 RBX: 0000000000000000 RCX: 0000000000000000
RDX: 0000000020000040 RSI: 0000000000000000 RDI: 0000555556ac12e8
RBP: 00007ffe2070bb78 R08: 0000000000000000 R09: 0000000000000000
R10: 00007fc65001fe60 R11: 0000000000054086 R12: 00000000001a71ed
R13: 00007ffe2070bba0 R14: 00007ffe2070bbc0 R15: 0000000000000032
 </TASK>