[peterz-queue:locking/core] [futex] 58141fa298: Oops:general_protection_fault,probably_for_non-canonical_address#:#[##]SMP

[kernel test robot <oliver.sang@intel.com>]

Hello,

kernel test robot noticed "Oops:general_protection_fault,probably_for_non-canonical_address#:#[##]SMP" on:

commit: 58141fa298f3f1df4ee145835eb3491cfe68f652 ("futex: Use runtime constants for __futex_hash() hot path")
https://git.kernel.org/cgit/linux/kernel/git/peterz/queue.git locking/core

in testcase: boot

config: x86_64-randconfig-012-20260704
compiler: gcc-14
test machine: qemu-system-x86_64 -enable-kvm -cpu SandyBridge -smp 2 -m 32G

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



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/202607091538.58e3f39-lkp@intel.com



[    1.259631][    T1] Running RCU Tasks Trace wait API self tests
[    1.261867][    T1] posixtimers hash table entries: 1024 (order: 5, 81920 bytes, linear)
[    1.264376][    T1] Oops: general protection fault, probably for non-canonical address 0x123456789abcdef: 0000 [#1] SMP
[    1.267507][    T1] CPU: 0 UID: 0 PID: 1 Comm: swapper/0 Not tainted 7.2.0-rc1+ #1 PREEMPTLAZY
[    1.267699][    T1] RIP: futex_init+0x1e4/0x2c0
[    1.267699][    T1] Code: c1 e7 07 4c 01 e7 e8 bb f7 5c fb 4c 89 f6 48 89 ef e8 b0 f6 5f fb 4c 39 f5 75 d9 e8 a6 f4 5f fb 89 d8 8d 53 01 be 00 04 00 00 <4d> 89 24 c7 48 63 d2 48 c7 c7 80 f1 3c 85 e8 c9 fb 22 fc e9 2c ff
All code
========
   0:	c1 e7 07             	shl    $0x7,%edi
   3:	4c 01 e7             	add    %r12,%rdi
   6:	e8 bb f7 5c fb       	call   0xfffffffffb5cf7c6
   b:	4c 89 f6             	mov    %r14,%rsi
   e:	48 89 ef             	mov    %rbp,%rdi
  11:	e8 b0 f6 5f fb       	call   0xfffffffffb5ff6c6
  16:	4c 39 f5             	cmp    %r14,%rbp
  19:	75 d9                	jne    0xfffffffffffffff4
  1b:	e8 a6 f4 5f fb       	call   0xfffffffffb5ff4c6
  20:	89 d8                	mov    %ebx,%eax
  22:	8d 53 01             	lea    0x1(%rbx),%edx
  25:	be 00 04 00 00       	mov    $0x400,%esi
  2a:*	4d 89 24 c7          	mov    %r12,(%r15,%rax,8)		<-- trapping instruction
  2e:	48 63 d2             	movslq %edx,%rdx
  31:	48 c7 c7 80 f1 3c 85 	mov    $0xffffffff853cf180,%rdi
  38:	e8 c9 fb 22 fc       	call   0xfffffffffc22fc06
  3d:	e9                   	.byte 0xe9
  3e:	2c ff                	sub    $0xff,%al

Code starting with the faulting instruction
===========================================
   0:	4d 89 24 c7          	mov    %r12,(%r15,%rax,8)
   4:	48 63 d2             	movslq %edx,%rdx
   7:	48 c7 c7 80 f1 3c 85 	mov    $0xffffffff853cf180,%rdi
   e:	e8 c9 fb 22 fc       	call   0xfffffffffc22fbdc
  13:	e9                   	.byte 0xe9
  14:	2c ff                	sub    $0xff,%al
[    1.267699][    T1] RSP: 0000:ffffc90000013de8 EFLAGS: 00010246
[    1.267699][    T1] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000000
[    1.267699][    T1] RDX: 0000000000000001 RSI: 0000000000000400 RDI: 0000000000000000
[    1.267699][    T1] RBP: 0000000000000200 R08: 0000000000000000 R09: 0000000000000000
[    1.267699][    T1] R10: 0000000000000000 R11: 0000000000000000 R12: ffff888100450000
[    1.267699][    T1] R13: 0000000000010000 R14: 0000000000000200 R15: 0123456789abcdef
[    1.267699][    T1] FS:  0000000000000000(0000) GS:ffff888899778000(0000) knlGS:0000000000000000
[    1.267699][    T1] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[    1.267699][    T1] CR2: ffff88883ffff000 CR3: 0000000004ab8000 CR4: 00000000000406b0
[    1.267699][    T1] Call Trace:
[    1.267699][    T1]  <TASK>
[    1.267699][    T1]  ? fail_futex_debugfs+0x80/0x80
[    1.267699][    T1]  do_one_initcall+0x62/0x280
[    1.267699][    T1]  do_initcalls+0x177/0x1c0
[    1.267699][    T1]  kernel_init_freeable+0x11c/0x1c0


The kernel config and materials to reproduce are available at:
https://download.01.org/0day-ci/archive/20260709/202607091538.58e3f39-lkp@intel.com



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