syzbot

======================================================
WARNING: possible circular locking dependency detected
5.15.180-syzkaller #0 Not tainted
------------------------------------------------------
syz-executor159/4978 is trying to acquire lock:
ffff88806e1a22c0 (mapping.invalidate_lock#3){.+.+}-{3:3}, at: filemap_invalidate_lock_shared include/linux/fs.h:842 [inline]
ffff88806e1a22c0 (mapping.invalidate_lock#3){.+.+}-{3:3}, at: filemap_fault+0x68b/0x13b0 mm/filemap.c:3081

but task is already holding lock:
ffff88807f6d3228 (&mm->mmap_lock){++++}-{3:3}, at: mmap_read_trylock include/linux/mmap_lock.h:136 [inline]
ffff88807f6d3228 (&mm->mmap_lock){++++}-{3:3}, at: do_user_addr_fault+0x2b9/0xc80 arch/x86/mm/fault.c:1298

which lock already depends on the new lock.


the existing dependency chain (in reverse order) is:

-> #2 (&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+0x19d/0x360 fs/ioctl.c:144
       ni_fiemap+0x878/0xc20 fs/ntfs3/frecord.c:1998
       ntfs_fiemap+0xd7/0x130 fs/ntfs3/file.c:1232
       ioctl_fiemap fs/ioctl.c:219 [inline]
       do_vfs_ioctl+0x1464/0x1de0 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

-> #1 (&ni->file.run_lock){.+.+}-{3:3}:
       down_read+0x44/0x2e0 kernel/locking/rwsem.c:1498
       attr_data_get_block+0x10d/0x1880 fs/ntfs3/attrib.c:831
       ntfs_get_block_vbo+0x2f6/0xc60 fs/ntfs3/inode.c:591
       do_mpage_readpage+0x820/0x1e30 fs/mpage.c:231
       mpage_readahead+0x3a6/0x8a0 fs/mpage.c:389
       read_pages+0x165/0x920 mm/readahead.c:130
       page_cache_ra_unbounded+0x830/0x930 mm/readahead.c:239
       page_cache_sync_readahead include/linux/pagemap.h:833 [inline]
       filemap_get_pages mm/filemap.c:2551 [inline]
       filemap_read+0x589/0x2480 mm/filemap.c:2634
       __kernel_read+0x4eb/0x910 fs/read_write.c:443
       integrity_kernel_read+0x86/0xd0 security/integrity/iint.c:228
       ima_calc_file_hash_tfm security/integrity/ima/ima_crypto.c:485 [inline]
       ima_calc_file_shash security/integrity/ima/ima_crypto.c:516 [inline]
       ima_calc_file_hash+0x1546/0x18e0 security/integrity/ima/ima_crypto.c:573
       ima_collect_measurement+0x2ef/0x760 security/integrity/ima/ima_api.c:255
       process_measurement+0xfb9/0x1a10 security/integrity/ima/ima_main.c:351
       ima_file_check+0xc1/0x100 security/integrity/ima/ima_main.c:533
       do_open fs/namei.c:3610 [inline]
       path_openat+0x2735/0x2f30 fs/namei.c:3742
       do_filp_open+0x1b3/0x3e0 fs/namei.c:3769
       do_sys_openat2+0x142/0x4a0 fs/open.c:1253
       do_sys_open fs/open.c:1269 [inline]
       __do_sys_openat fs/open.c:1285 [inline]
       __se_sys_openat fs/open.c:1280 [inline]
       __x64_sys_openat+0x135/0x160 fs/open.c:1280
       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#3){.+.+}-{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+0x2c33/0x7c60 kernel/locking/lockdep.c:5012
       lock_acquire+0x197/0x3f0 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+0x68b/0x13b0 mm/filemap.c:3081
       __do_fault+0x141/0x330 mm/memory.c:3928
       do_read_fault mm/memory.c:4264 [inline]
       do_fault mm/memory.c:4392 [inline]
       handle_pte_fault mm/memory.c:4650 [inline]
       __handle_mm_fault mm/memory.c:4785 [inline]
       handle_mm_fault+0x2949/0x43c0 mm/memory.c:4883
       do_user_addr_fault+0x489/0xc80 arch/x86/mm/fault.c:1357
       handle_page_fault arch/x86/mm/fault.c:1445 [inline]
       exc_page_fault+0x60/0x100 arch/x86/mm/fault.c:1501
       asm_exc_page_fault+0x22/0x30 arch/x86/include/asm/idtentry.h:606
       copy_user_generic_unrolled+0x86/0xc0 arch/x86/lib/copy_user_64.S:90
       copy_user_generic arch/x86/include/asm/uaccess_64.h:37 [inline]
       raw_copy_from_user arch/x86/include/asm/uaccess_64.h:52 [inline]
       _copy_from_user+0xfa/0x170 lib/usercopy.c:23
       copy_from_user include/linux/uaccess.h:192 [inline]
       ioctl_fiemap fs/ioctl.c:209 [inline]
       do_vfs_ioctl+0x5be/0x1de0 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

other info that might help us debug this:

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

 Possible unsafe locking scenario:

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

 *** DEADLOCK ***

1 lock held by syz-executor159/4978:
 #0: ffff88807f6d3228 (&mm->mmap_lock){++++}-{3:3}, at: mmap_read_trylock include/linux/mmap_lock.h:136 [inline]
 #0: ffff88807f6d3228 (&mm->mmap_lock){++++}-{3:3}, at: do_user_addr_fault+0x2b9/0xc80 arch/x86/mm/fault.c:1298

stack backtrace:
CPU: 0 PID: 4978 Comm: syz-executor159 Not tainted 5.15.180-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/19/2025
Call Trace:
 <TASK>
 dump_stack_lvl+0x168/0x230 lib/dump_stack.c:106
 check_noncircular+0x274/0x310 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+0x2c33/0x7c60 kernel/locking/lockdep.c:5012
 lock_acquire+0x197/0x3f0 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+0x68b/0x13b0 mm/filemap.c:3081
 __do_fault+0x141/0x330 mm/memory.c:3928
 do_read_fault mm/memory.c:4264 [inline]
 do_fault mm/memory.c:4392 [inline]
 handle_pte_fault mm/memory.c:4650 [inline]
 __handle_mm_fault mm/memory.c:4785 [inline]
 handle_mm_fault+0x2949/0x43c0 mm/memory.c:4883
 do_user_addr_fault+0x489/0xc80 arch/x86/mm/fault.c:1357
 handle_page_fault arch/x86/mm/fault.c:1445 [inline]
 exc_page_fault+0x60/0x100 arch/x86/mm/fault.c:1501
 asm_exc_page_fault+0x22/0x30 arch/x86/include/asm/idtentry.h:606
RIP: 0010:copy_user_generic_unrolled+0x86/0xc0 arch/x86/lib/copy_user_64.S:91
Code: 4c 8b 5e 38 4c 89 47 20 4c 89 4f 28 4c 89 57 30 4c 89 5f 38 48 8d 76 40 48 8d 7f 40 ff c9 75 b6 89 d1 83 e2 07 c1 e9 03 74 12 <4c> 8b 06 4c 89 07 48 8d 76 08 48 8d 7f 08 ff c9 75 ee 21 d2 74 10
RSP: 0018:ffffc90002f1fa80 EFLAGS: 00050202
RAX: ffffffff83db5201 RBX: 0000000000000020 RCX: 0000000000000004
RDX: 0000000000000000 RSI: 0000200000000080 RDI: ffffc90002f1fdd0
RBP: 0000000000000000 R08: dffffc0000000000 R09: fffff520005e3fbe
R10: fffff520005e3fbe R11: 1ffff920005e3fba R12: 00007ffffffff000
R13: 00002000000000a0 R14: ffffc90002f1fdd0 R15: 0000200000000080
 copy_user_generic arch/x86/include/asm/uaccess_64.h:37 [inline]
 raw_copy_from_user arch/x86/include/asm/uaccess_64.h:52 [inline]
 _copy_from_user+0xfa/0x170 lib/usercopy.c:23
 copy_from_user include/linux/uaccess.h:192 [inline]
 ioctl_fiemap fs/ioctl.c:209 [inline]
 do_vfs_ioctl+0x5be/0x1de0 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
RIP: 0033:0x7f0c93696c89
Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 e1 18 00 00 90 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 b0 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f0c93631218 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00007f0c9373e6d8 RCX: 00007f0c93696c89
RDX: 0000200000000080 RSI: 00000000c020660b RDI: 0000000000000004
RBP: 00007f0c9373e6d0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00007f0c9370aae0
R13: 0000200000000fc0 R14: 0000200000000080 R15: 0000200000000000
 </TASK>
----------------
Code disassembly (best guess):
   0:	4c 8b 5e 38          	mov    0x38(%rsi),%r11
   4:	4c 89 47 20          	mov    %r8,0x20(%rdi)
   8:	4c 89 4f 28          	mov    %r9,0x28(%rdi)
   c:	4c 89 57 30          	mov    %r10,0x30(%rdi)
  10:	4c 89 5f 38          	mov    %r11,0x38(%rdi)
  14:	48 8d 76 40          	lea    0x40(%rsi),%rsi
  18:	48 8d 7f 40          	lea    0x40(%rdi),%rdi
  1c:	ff c9                	dec    %ecx
  1e:	75 b6                	jne    0xffffffd6
  20:	89 d1                	mov    %edx,%ecx
  22:	83 e2 07             	and    $0x7,%edx
  25:	c1 e9 03             	shr    $0x3,%ecx
  28:	74 12                	je     0x3c
* 2a:	4c 8b 06             	mov    (%rsi),%r8 <-- trapping instruction
  2d:	4c 89 07             	mov    %r8,(%rdi)
  30:	48 8d 76 08          	lea    0x8(%rsi),%rsi
  34:	48 8d 7f 08          	lea    0x8(%rdi),%rdi
  38:	ff c9                	dec    %ecx
  3a:	75 ee                	jne    0x2a
  3c:	21 d2                	and    %edx,%edx
  3e:	74 10                	je     0x50