syzbot

======================================================
WARNING: possible circular locking dependency detected
6.16.0-rc1-syzkaller-00157-g02adc1490e6d #0 Not tainted
------------------------------------------------------
syz-executor330/7336 is trying to acquire lock:
ffff888070db7680 (&ni->ni_lock#3/5){+.+.}-{4:4}, at: ni_lock fs/ntfs3/ntfs_fs.h:1100 [inline]
ffff888070db7680 (&ni->ni_lock#3/5){+.+.}-{4:4}, at: ntfs_read_folio+0xba/0x200 fs/ntfs3/inode.c:726

but task is already holding lock:
ffff888070db7ab8 (mapping.invalidate_lock#3){.+.+}-{4:4}, at: filemap_invalidate_lock_shared include/linux/fs.h:932 [inline]
ffff888070db7ab8 (mapping.invalidate_lock#3){.+.+}-{4:4}, at: filemap_create_folio mm/filemap.c:2538 [inline]
ffff888070db7ab8 (mapping.invalidate_lock#3){.+.+}-{4:4}, at: filemap_get_pages+0xc29/0x1ea0 mm/filemap.c:2608

which lock already depends on the new lock.


the existing dependency chain (in reverse order) is:

-> #2 (mapping.invalidate_lock#3){.+.+}-{4:4}:
       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:932 [inline]
       filemap_fault+0x546/0x1200 mm/filemap.c:3400
       __do_fault+0x135/0x390 mm/memory.c:5189
       do_read_fault mm/memory.c:5610 [inline]
       do_fault mm/memory.c:5744 [inline]
       do_pte_missing mm/memory.c:4251 [inline]
       handle_pte_fault mm/memory.c:6089 [inline]
       __handle_mm_fault+0x37ed/0x5620 mm/memory.c:6232
       handle_mm_fault+0x2d5/0x7f0 mm/memory.c:6401
       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+0xd66/0x15b0 mm/gup.c:2506
       pin_user_pages_remote+0xd4/0x120 mm/gup.c:3500
       process_vm_rw_single_vec mm/process_vm_access.c:106 [inline]
       process_vm_rw_core mm/process_vm_access.c:216 [inline]
       process_vm_rw+0x59e/0xb40 mm/process_vm_access.c:284
       __do_sys_process_vm_readv mm/process_vm_access.c:296 [inline]
       __se_sys_process_vm_readv mm/process_vm_access.c:292 [inline]
       __x64_sys_process_vm_readv+0xe0/0x100 mm/process_vm_access.c:292
       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 (&mm->mmap_lock){++++}-{4:4}:
       lock_acquire+0x120/0x360 kernel/locking/lockdep.c:5871
       __might_fault+0xcc/0x130 mm/memory.c:6991
       _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: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

-> #0 (&ni->ni_lock#3/5){+.+.}-{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
       __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_read_folio+0xba/0x200 fs/ntfs3/inode.c:726
       filemap_read_folio+0x114/0x380 mm/filemap.c:2412
       filemap_create_folio mm/filemap.c:2547 [inline]
       filemap_get_pages+0xd4e/0x1ea0 mm/filemap.c:2608
       filemap_read+0x3f6/0x11a0 mm/filemap.c:2711
       __kernel_read+0x469/0x8c0 fs/read_write.c:530
       integrity_kernel_read+0x89/0xd0 security/integrity/iint.c:28
       ima_calc_file_hash_tfm security/integrity/ima/ima_crypto.c:480 [inline]
       ima_calc_file_shash security/integrity/ima/ima_crypto.c:511 [inline]
       ima_calc_file_hash+0x85e/0x16f0 security/integrity/ima/ima_crypto.c:568
       ima_collect_measurement+0x428/0x8d0 security/integrity/ima/ima_api.c:293
       process_measurement+0x1121/0x1a40 security/integrity/ima/ima_main.c:385
       ima_file_check+0xd7/0x120 security/integrity/ima/ima_main.c:613
       security_file_post_open+0xbb/0x290 security/security.c:3130
       do_open fs/namei.c:3889 [inline]
       path_openat+0x2f26/0x3830 fs/namei.c:4046
       do_filp_open+0x1fa/0x410 fs/namei.c:4073
       do_sys_openat2+0x121/0x1c0 fs/open.c:1437
       do_sys_open fs/open.c:1452 [inline]
       __do_sys_openat fs/open.c:1468 [inline]
       __se_sys_openat fs/open.c:1463 [inline]
       __x64_sys_openat+0x138/0x170 fs/open.c:1463
       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:
  &ni->ni_lock#3/5 --> &mm->mmap_lock --> mapping.invalidate_lock#3

 Possible unsafe locking scenario:

       CPU0                    CPU1
       ----                    ----
  rlock(mapping.invalidate_lock#3);
                               lock(&mm->mmap_lock);
                               lock(mapping.invalidate_lock#3);
  lock(&ni->ni_lock#3/5);

 *** DEADLOCK ***

2 locks held by syz-executor330/7336:
 #0: ffff888034e077d8 (&ima_iint_mutex_key[depth]){+.+.}-{4:4}, at: process_measurement+0x74b/0x1a40 security/integrity/ima/ima_main.c:279
 #1: ffff888070db7ab8 (mapping.invalidate_lock#3){.+.+}-{4:4}, at: filemap_invalidate_lock_shared include/linux/fs.h:932 [inline]
 #1: ffff888070db7ab8 (mapping.invalidate_lock#3){.+.+}-{4:4}, at: filemap_create_folio mm/filemap.c:2538 [inline]
 #1: ffff888070db7ab8 (mapping.invalidate_lock#3){.+.+}-{4:4}, at: filemap_get_pages+0xc29/0x1ea0 mm/filemap.c:2608

stack backtrace:
CPU: 0 UID: 0 PID: 7336 Comm: syz-executor330 Not tainted 6.16.0-rc1-syzkaller-00157-g02adc1490e6d #0 PREEMPT(full) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025
Call Trace:
 <TASK>
 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
 __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_read_folio+0xba/0x200 fs/ntfs3/inode.c:726
 filemap_read_folio+0x114/0x380 mm/filemap.c:2412
 filemap_create_folio mm/filemap.c:2547 [inline]
 filemap_get_pages+0xd4e/0x1ea0 mm/filemap.c:2608
 filemap_read+0x3f6/0x11a0 mm/filemap.c:2711
 __kernel_read+0x469/0x8c0 fs/read_write.c:530
 integrity_kernel_read+0x89/0xd0 security/integrity/iint.c:28
 ima_calc_file_hash_tfm security/integrity/ima/ima_crypto.c:480 [inline]
 ima_calc_file_shash security/integrity/ima/ima_crypto.c:511 [inline]
 ima_calc_file_hash+0x85e/0x16f0 security/integrity/ima/ima_crypto.c:568
 ima_collect_measurement+0x428/0x8d0 security/integrity/ima/ima_api.c:293
 process_measurement+0x1121/0x1a40 security/integrity/ima/ima_main.c:385
 ima_file_check+0xd7/0x120 security/integrity/ima/ima_main.c:613
 security_file_post_open+0xbb/0x290 security/security.c:3130
 do_open fs/namei.c:3889 [inline]
 path_openat+0x2f26/0x3830 fs/namei.c:4046
 do_filp_open+0x1fa/0x410 fs/namei.c:4073
 do_sys_openat2+0x121/0x1c0 fs/open.c:1437
 do_sys_open fs/open.c:1452 [inline]
 __do_sys_openat fs/open.c:1468 [inline]
 __se_sys_openat fs/open.c:1463 [inline]
 __x64_sys_openat+0x138/0x170 fs/open.c:1463
 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: 0033:0x7f702056ca09
Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 71 1d 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:00007f701fcf3218 EFLAGS: 00000246 ORIG_RAX: 0000000000000101
RAX: ffffffffffffffda RBX: 00007f702060d6f8 RCX: 00007f702056ca09
RDX: 0000000000101142 RSI: 0000200000000040 RDI: 00000000ffffff9c
RBP: 00007f702060d6f0 R08: 0000000000000000 R09: 0000000000000000
R10: 00000000000000ef R11: 0000000000000246 R12: 00007f70205d8e14
R13: 0000200000000040 R14: 00002000000005c0 R15: 00002000000000c0
 </TASK>