batman_adv: The newly added mac address (aa:aa:aa:aa:aa:3e) already exists on: batadv_slave_0
batman_adv: It is strongly recommended to keep mac addresses unique to avoid problems!
======================================================
WARNING: possible circular locking dependency detected
6.9.0-rc4-syzkaller-00214-g13a2e429f644 #0 Not tainted
------------------------------------------------------
syz-executor.3/16515 is trying to acquire lock:
ffff8880489b2df0 (&ni->file.run_lock#3){++++}-{3:3}, at: attr_data_get_block+0x18b/0x1b70 fs/ntfs3/attrib.c:902

but task is already holding lock:
ffff88801f9dea20 (&mm->mmap_lock){++++}-{3:3}, at: mmap_write_lock_killable include/linux/mmap_lock.h:124 [inline]
ffff88801f9dea20 (&mm->mmap_lock){++++}-{3:3}, at: vm_mmap_pgoff+0x160/0x3c0 mm/util.c:571

which lock already depends on the new lock.


the existing dependency chain (in reverse order) is:

-> #1 (&mm->mmap_lock){++++}-{3:3}:
       __might_fault mm/memory.c:6220 [inline]
       __might_fault+0x11b/0x190 mm/memory.c:6213
       _copy_to_user+0x2b/0xc0 lib/usercopy.c:36
       copy_to_user include/linux/uaccess.h:191 [inline]
       fiemap_fill_next_extent+0x232/0x390 fs/ioctl.c:145
       ni_fiemap+0x444/0xc10 fs/ntfs3/frecord.c:2065
       ntfs_fiemap+0xc9/0x120 fs/ntfs3/file.c:1206
       ioctl_fiemap fs/ioctl.c:220 [inline]
       do_vfs_ioctl+0x404/0x1ac0 fs/ioctl.c:838
       __do_sys_ioctl fs/ioctl.c:902 [inline]
       __se_sys_ioctl fs/ioctl.c:890 [inline]
       __x64_sys_ioctl+0x116/0x220 fs/ioctl.c:890
       do_syscall_x64 arch/x86/entry/common.c:52 [inline]
       do_syscall_64+0xcf/0x260 arch/x86/entry/common.c:83
       entry_SYSCALL_64_after_hwframe+0x77/0x7f

-> #0 (&ni->file.run_lock#3){++++}-{3:3}:
       check_prev_add kernel/locking/lockdep.c:3134 [inline]
       check_prevs_add kernel/locking/lockdep.c:3253 [inline]
       validate_chain kernel/locking/lockdep.c:3869 [inline]
       __lock_acquire+0x2478/0x3b30 kernel/locking/lockdep.c:5137
       lock_acquire kernel/locking/lockdep.c:5754 [inline]
       lock_acquire+0x1b1/0x560 kernel/locking/lockdep.c:5719
       down_read+0x9a/0x330 kernel/locking/rwsem.c:1526
       attr_data_get_block+0x18b/0x1b70 fs/ntfs3/attrib.c:902
       ntfs_file_mmap+0x5a1/0x7e0 fs/ntfs3/file.c:294
       call_mmap include/linux/fs.h:2115 [inline]
       mmap_region+0x73e/0x2760 mm/mmap.c:2820
       do_mmap+0x8ae/0xf10 mm/mmap.c:1385
       vm_mmap_pgoff+0x1ab/0x3c0 mm/util.c:573
       ksys_mmap_pgoff+0x425/0x5b0 mm/mmap.c:1431
       __do_sys_mmap arch/x86/kernel/sys_x86_64.c:86 [inline]
       __se_sys_mmap arch/x86/kernel/sys_x86_64.c:79 [inline]
       __x64_sys_mmap+0x125/0x190 arch/x86/kernel/sys_x86_64.c:79
       do_syscall_x64 arch/x86/entry/common.c:52 [inline]
       do_syscall_64+0xcf/0x260 arch/x86/entry/common.c:83
       entry_SYSCALL_64_after_hwframe+0x77/0x7f

other info that might help us debug this:

 Possible unsafe locking scenario:

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

 *** DEADLOCK ***

1 lock held by syz-executor.3/16515:
 #0: ffff88801f9dea20 (&mm->mmap_lock){++++}-{3:3}, at: mmap_write_lock_killable include/linux/mmap_lock.h:124 [inline]
 #0: ffff88801f9dea20 (&mm->mmap_lock){++++}-{3:3}, at: vm_mmap_pgoff+0x160/0x3c0 mm/util.c:571

stack backtrace:
CPU: 2 PID: 16515 Comm: syz-executor.3 Not tainted 6.9.0-rc4-syzkaller-00214-g13a2e429f644 #0
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.2-debian-1.16.2-1 04/01/2014
Call Trace:
 <TASK>
 __dump_stack lib/dump_stack.c:88 [inline]
 dump_stack_lvl+0x116/0x1f0 lib/dump_stack.c:114
 check_noncircular+0x31a/0x400 kernel/locking/lockdep.c:2187
 check_prev_add kernel/locking/lockdep.c:3134 [inline]
 check_prevs_add kernel/locking/lockdep.c:3253 [inline]
 validate_chain kernel/locking/lockdep.c:3869 [inline]
 __lock_acquire+0x2478/0x3b30 kernel/locking/lockdep.c:5137
 lock_acquire kernel/locking/lockdep.c:5754 [inline]
 lock_acquire+0x1b1/0x560 kernel/locking/lockdep.c:5719
 down_read+0x9a/0x330 kernel/locking/rwsem.c:1526
 attr_data_get_block+0x18b/0x1b70 fs/ntfs3/attrib.c:902
 ntfs_file_mmap+0x5a1/0x7e0 fs/ntfs3/file.c:294
 call_mmap include/linux/fs.h:2115 [inline]
 mmap_region+0x73e/0x2760 mm/mmap.c:2820
 do_mmap+0x8ae/0xf10 mm/mmap.c:1385
 vm_mmap_pgoff+0x1ab/0x3c0 mm/util.c:573
 ksys_mmap_pgoff+0x425/0x5b0 mm/mmap.c:1431
 __do_sys_mmap arch/x86/kernel/sys_x86_64.c:86 [inline]
 __se_sys_mmap arch/x86/kernel/sys_x86_64.c:79 [inline]
 __x64_sys_mmap+0x125/0x190 arch/x86/kernel/sys_x86_64.c:79
 do_syscall_x64 arch/x86/entry/common.c:52 [inline]
 do_syscall_64+0xcf/0x260 arch/x86/entry/common.c:83
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f8f9b47dea9
Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 e1 20 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:00007f8f9afff0c8 EFLAGS: 00000246 ORIG_RAX: 0000000000000009
RAX: ffffffffffffffda RBX: 00007f8f9b5abf80 RCX: 00007f8f9b47dea9
RDX: 0000000000000002 RSI: 0000000000b36000 RDI: 0000000020000000
RBP: 00007f8f9b4ca4a4 R08: 000000000000000c R09: 0000000000000000
R10: 0000000000028011 R11: 0000000000000246 R12: 0000000000000000
R13: 000000000000000b R14: 00007f8f9b5abf80 R15: 00007ffcf8e3b028
 </TASK>