[thomas-weissschuh:b4/vdso-sparc64-generic-2] [vdso/datastore] 6436f5c960: Bad_pagetable

[thomas-weissschuh:b4/vdso-sparc64-generic-2] [vdso/datastore] 6436f5c960: Bad_pagetable

[kernel test robot]

Hello,

kernel test robot noticed "Bad_pagetable" on:

commit: 6436f5c960638cb098424b38f2e9781154112380 ("vdso/datastore: Allocate data pages dynamically")
https://git.kernel.org/cgit/linux/kernel/git/thomas.weissschuh/linux.git b4/vdso-sparc64-generic-2

in testcase: boot

config: x86_64-kexec
compiler: clang-20
test machine: qemu-system-x86_64 -enable-kvm -cpu SandyBridge -smp 2 -m 16G

(please refer to attached dmesg/kmsg for entire log/backtrace)


+------------------------------------------+------------+------------+
|                                          | 22d81ce14c | 6436f5c960 |
+------------------------------------------+------------+------------+
| boot_successes                           | 12         | 0          |
| boot_failures                            | 0          | 12         |
| Bad_pagetable                            | 0          | 12         |
| Kernel_panic-not_syncing:Fatal_exception | 0          | 12         |
+------------------------------------------+------------+------------+


If you fix the issue in a separate patch/commit (i.e. not just a new version of
the same patch/commit), kindly add following tags
| Reported-by: kernel test robot <oliver.sang@intel.com>
| Closes: https://lore.kernel.org/oe-lkp/202509121258.599356dc-lkp@intel.com


INIT: version 2.88 booting
[    5.689575][ T1530] init: Corrupted page table at address 7fdfcc79d000
[    5.690579][ T1530] PGD 8000000124a1d067 P4D 8000000124a1d067 PUD 124dc0067 PMD 124db9067 PTE 800f88818ca10235
[    5.696374][ T1530] Oops: Bad pagetable: 000d [#1] SMP PTI
[    5.697220][ T1530] CPU: 0 UID: 0 PID: 1530 Comm: init Not tainted 6.17.0-rc4-00029-g6436f5c96063 #1 PREEMPT(voluntary)
[    5.698735][ T1530] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.16.3-debian-1.16.3-2 04/01/2014
[    5.700209][ T1530] RIP: 0033:0x7fdfcc7a3746
[ 5.700911][ T1530] Code: 41 55 41 54 53 48 83 ec 10 48 85 ff 0f 84 29 01 00 00 48 bb ff ff ff ff ff ff ff 7f 49 be ff ff ff ff ff ff ff 3f 4d 8d 7e 01 <44> 8b 25 b3 98 ff ff 41 f6 c4 01 75 5f 8b 05 ab 98 ff ff 83 f8 01
All code
========
   0:	41 55                	push   %r13
   2:	41 54                	push   %r12
   4:	53                   	push   %rbx
   5:	48 83 ec 10          	sub    $0x10,%rsp
   9:	48 85 ff             	test   %rdi,%rdi
   c:	0f 84 29 01 00 00    	je     0x13b
  12:	48 bb ff ff ff ff ff 	movabs $0x7fffffffffffffff,%rbx
  19:	ff ff 7f 
  1c:	49 be ff ff ff ff ff 	movabs $0x3fffffffffffffff,%r14
  23:	ff ff 3f 
  26:	4d 8d 7e 01          	lea    0x1(%r14),%r15
  2a:*	44 8b 25 b3 98 ff ff 	mov    -0x674d(%rip),%r12d        # 0xffffffffffff98e4		<-- trapping instruction
  31:	41 f6 c4 01          	test   $0x1,%r12b
  35:	75 5f                	jne    0x96
  37:	8b 05 ab 98 ff ff    	mov    -0x6755(%rip),%eax        # 0xffffffffffff98e8
  3d:	83 f8 01             	cmp    $0x1,%eax

Code starting with the faulting instruction
===========================================
   0:	44 8b 25 b3 98 ff ff 	mov    -0x674d(%rip),%r12d        # 0xffffffffffff98ba
   7:	41 f6 c4 01          	test   $0x1,%r12b
   b:	75 5f                	jne    0x6c
   d:	8b 05 ab 98 ff ff    	mov    -0x6755(%rip),%eax        # 0xffffffffffff98be
  13:	83 f8 01             	cmp    $0x1,%eax
[    5.703533][ T1530] RSP: 002b:00007ffe81dbc808 EFLAGS: 00010206
[    5.704387][ T1530] RAX: 00007ffe81dbc898 RBX: 7fffffffffffffff RCX: 00007fdfcc67e1b0
[    5.705546][ T1530] RDX: 0000000000000000 RSI: 0000000000000000 RDI: 00007ffe81dbc860
[    5.706691][ T1530] RBP: 00007ffe81dbc840 R08: 0000000000000001 R09: 00007ffe81dbcbc0
[    5.708168][ T1530] R10: 0000000000000000 R11: 00007fdfcc758c10 R12: 0000557d503f1339
[    5.709332][ T1530] R13: 0000557d503f668c R14: 3fffffffffffffff R15: 4000000000000000
[    5.710539][ T1530] FS:  00007fdfcc79b580 GS:  0000000000000000
[    5.711508][ T1530] Modules linked in:
[    5.712129][ T1530] ---[ end trace 0000000000000000 ]---
[    5.712925][ T1530] RIP: 0033:0x7fdfcc7a3746
[    5.713600][ T1530] RSP: 002b:00007ffe81dbc808 EFLAGS: 00010206
[    5.714464][ T1530] RAX: 00007ffe81dbc898 RBX: 7fffffffffffffff RCX: 00007fdfcc67e1b0
[    5.715696][ T1530] RDX: 0000000000000000 RSI: 0000000000000000 RDI: 00007ffe81dbc860
[    5.716941][ T1530] RBP: 00007ffe81dbc840 R08: 0000000000000001 R09: 00007ffe81dbcbc0
[    5.718145][ T1530] R10: 0000000000000000 R11: 00007fdfcc758c10 R12: 0000557d503f1339
[    5.719403][ T1530] R13: 0000557d503f668c R14: 3fffffffffffffff R15: 4000000000000000
[    5.720582][ T1530] FS:  00007fdfcc79b580(0000) GS:ffff8884ac416000(0000) knlGS:0000000000000000
[    5.721848][ T1530] CS:  0033 DS: 0000 ES: 0000 CR0: 0000000080050033
[    5.722759][ T1530] CR2: 00007fdfcc79d000 CR3: 0000000124cce000 CR4: 00000000000406f0
[    5.728314][ T1530] Kernel panic - not syncing: Fatal exception
[    5.729402][ T1530] Kernel Offset: disabled



The kernel config and materials to reproduce are available at:
https://download.01.org/0day-ci/archive/20250912/202509121258.599356dc-lkp@intel.com



-- 
0-DAY CI Kernel Test Service
https://github.com/intel/lkp-tests/wiki