Greeting,

FYI, we noticed the following commit (built with clang-14):

commit: 0858d7da8a09e440fb192a0239d20249a2d16af8 ("ramfs: fix mount source show for ramfs")
https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git master

in testcase: boot

on test machine: qemu-system-x86_64 -enable-kvm -cpu SandyBridge -smp 2 -m 16G

caused below changes (please refer to attached dmesg/kmsg for entire log/backtrace):


+------------------------------------------+------------+------------+
|                                          | 2d93a5835a | 0858d7da8a |
+------------------------------------------+------------+------------+
| boot_successes                           | 17         | 4          |
| boot_failures                            | 0          | 13         |
| canonical_address#:#[##]                 | 0          | 12         |
| RIP:ntfs_update_mftmirr                  | 0          | 12         |
| Kernel_panic-not_syncing:Fatal_exception | 0          | 12         |
+------------------------------------------+------------+------------+


If you fix the issue, kindly add following tag
Reported-by: kernel test robot <oliver.sang@intel.com>


[  806.118664][    T1]     selinux=0
[  806.119418][    T1]     softlockup_panic=1
[  806.120350][    T1]     nmi_watchdog=panic
[  806.121180][    T1]     vga=normal
[  806.257788][  T204] /dev/root: Can't open blockdev
[  806.259101][  T204] general protection fault, probably for non-canonical address 0xdffffc0000000003: 0000 [#1] SMP KASAN
[  806.263082][  T204] KASAN: null-ptr-deref in range [0x0000000000000018-0x000000000000001f]
[  806.264593][  T204] CPU: 1 PID: 204 Comm: mount Not tainted 5.15.0-00312-g0858d7da8a09 #1
[  806.266012][  T204] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014
[ 806.267540][ T204] RIP: 0010:ntfs_update_mftmirr (kbuild/src/consumer/fs/ntfs3/fsntfs.c:834) 
[ 806.268641][ T204] Code: 4c 89 e8 48 c1 e8 03 42 80 3c 30 00 74 08 4c 89 ef e8 f4 4b a0 ff 4d 8b 65 00 49 8d 5c 24 18 48 89 d8 48 c1 e8 03 48 89 45 90 <42> 80 3c 30 00 74 08 48 89 df e8 d1 4b a0 ff 48 89 9d 78 ff ff ff
All code
========
   0:	4c 89 e8             	mov    %r13,%rax
   3:	48 c1 e8 03          	shr    $0x3,%rax
   7:	42 80 3c 30 00       	cmpb   $0x0,(%rax,%r14,1)
   c:	74 08                	je     0x16
   e:	4c 89 ef             	mov    %r13,%rdi
  11:	e8 f4 4b a0 ff       	callq  0xffffffffffa04c0a
  16:	4d 8b 65 00          	mov    0x0(%r13),%r12
  1a:	49 8d 5c 24 18       	lea    0x18(%r12),%rbx
  1f:	48 89 d8             	mov    %rbx,%rax
  22:	48 c1 e8 03          	shr    $0x3,%rax
  26:	48 89 45 90          	mov    %rax,-0x70(%rbp)
  2a:*	42 80 3c 30 00       	cmpb   $0x0,(%rax,%r14,1)		<-- trapping instruction
  2f:	74 08                	je     0x39
  31:	48 89 df             	mov    %rbx,%rdi
  34:	e8 d1 4b a0 ff       	callq  0xffffffffffa04c0a
  39:	48 89 9d 78 ff ff ff 	mov    %rbx,-0x88(%rbp)

Code starting with the faulting instruction
===========================================
   0:	42 80 3c 30 00       	cmpb   $0x0,(%rax,%r14,1)
   5:	74 08                	je     0xf
   7:	48 89 df             	mov    %rbx,%rdi
   a:	e8 d1 4b a0 ff       	callq  0xffffffffffa04be0
   f:	48 89 9d 78 ff ff ff 	mov    %rbx,-0x88(%rbp)
[  806.271820][  T204] RSP: 0000:ffffc90000297c08 EFLAGS: 00010206
[  806.272964][  T204] RAX: 0000000000000003 RBX: 0000000000000018 RCX: ffff888122c58000
[  806.274379][  T204] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffff888122a76000
[  806.275793][  T204] RBP: ffffc90000297c90 R08: dffffc0000000000 R09: ffff888122a762a8
[  806.277143][  T204] R10: dfffe9102454ec59 R11: 1ffff1102454ec55 R12: 0000000000000000
[  806.278484][  T204] R13: ffff888122a76000 R14: dffffc0000000000 R15: dffffc0000000000
[  806.279930][  T204] FS:  0000000000000000(0000) GS:ffff8883a0500000(0063) knlGS:00000000f7e8f200
[  806.281545][  T204] CS:  0010 DS: 002b ES: 002b CR0: 0000000080050033
[  806.282669][  T204] CR2: 00000000565fa0ec CR3: 00000001229cf000 CR4: 00000000000406e0
[  806.284123][  T204] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[  806.285604][  T204] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[  806.287064][  T204] Call Trace:
[ 806.287746][ T204] ? kfree (kbuild/src/consumer/mm/slub.c:4553) 
[ 806.288623][ T204] ? trace_kfree (kbuild/src/consumer/include/trace/events/kmem.h:118) 
[ 806.289448][ T204] ? memset (kbuild/src/consumer/mm/kasan/shadow.c:?) 
[ 806.290232][ T204] put_ntfs (kbuild/src/consumer/fs/ntfs3/super.c:465) 
[ 806.291046][ T204] ntfs_fs_free (kbuild/src/consumer/fs/ntfs3/super.c:1365) 


To reproduce:

        # build kernel
	cd linux
	cp config-5.15.0-00312-g0858d7da8a09 .config
	make HOSTCC=clang-14 CC=clang-14 ARCH=x86_64 olddefconfig prepare modules_prepare bzImage modules
	make HOSTCC=clang-14 CC=clang-14 ARCH=x86_64 INSTALL_MOD_PATH=<mod-install-dir> modules_install
	cd <mod-install-dir>
	find lib/ | cpio -o -H newc --quiet | gzip > modules.cgz


        git clone https://github.com/intel/lkp-tests.git
        cd lkp-tests
        bin/lkp qemu -k <bzImage> -m modules.cgz job-script # job-script is attached in this email

        # if come across any failure that blocks the test,
        # please remove ~/.lkp and /lkp dir to run from a clean state.



---
0DAY/LKP+ Test Infrastructure                   Open Source Technology Center
https://lists.01.org/hyperkitty/list/lkp@lists.01.org       Intel Corporation

Thanks,
Oliver Sang