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

[K Prateek Nayak <kprateek.nayak@amd.com>]

Hello Oliver,

On 7/9/2026 1:47 PM, kernel test robot wrote:
> [    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

Thank you for the report! This is an unpatched address for the runtime
constant which suggests we are using the address before it is patched.
Following seems to solve it for me on your config:

  (Prepared on top of queue:locking/core)

diff --git a/kernel/futex/core.c b/kernel/futex/core.c
index c6af6edf5d7ae..0864c6e8cde78 100644
--- a/kernel/futex/core.c
+++ b/kernel/futex/core.c
@@ -2027,6 +2027,8 @@ static int __init futex_init(void)
 	runtime_const_init(mask,  __futex_mask);
 	runtime_const_init(ptr,   __futex_queues);
 
+	barrier();
+
 	BUG_ON(!futex_queues());
 
 	for_each_node(n) {
---

Could you please check if this is the same issue you are hitting too?

My default config seems to have been much less aggressive at
optimization to have exposed this problem.

-- 
Thanks and Regards,
Prateek