Re: commit 7b025f3f85ed causes NULL pointer dereference

Thomas Gleixner
2025-04-08T15:29:20Z

On Tue, Apr 08 2025 at 17:09, Thomas Gleixner wrote:
> On Tue, Apr 08 2025 at 14:04, Bert Karwatzki wrote:
>> Since linux-next-20250408 I get a NULL pointer dereference when booting:
>>
>> [ T669] BUG: kernel NULL pointer dereference, address: 0000000000000330
>> [ T669] #PF: supervisor read access in kernel mode
>> [ T669] #PF: error_code(0x0000) - not-present page
>> [ T669] PGD 0 P4D 0
>> [ T669] Oops: Oops: 0000 [#1] SMP NOPTI
>> [ T669] CPU: 2 UID: 0 PID: 669 Comm: (udev-worker) Not tainted 6.15.0-rc1-next-20250408-master #788 PREEMPT_{RT,(lazy)}
>> [ T669] Hardware name: Micro-Star International Co., Ltd. Alpha 15 B5EEK/MS-158L, BIOS E158LAMS.107 11/10/2021
>> [ T669] RIP: 0010:msi_domain_first_desc+0x4/0x30
>> [ T669] Code: e9 21 ff ff ff 0f 0b 31 c0 e9 f3 8c da ff 0f 1f 84 00 00 00 00 00 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 f3 0f 1e fa <48> 8b bf 68 02 00 00 48 85 ff 74 13 85 f6 75 0f 48 c7 47 60 00 00
>> [ T669] RSP: 0018:ffffcec6c25cfa78 EFLAGS: 00010246
>> [ T669] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000008
>> [ T669] RDX: 0000000000000000 RSI: 0000000000000000 RDI: 00000000000000c8
>> [ T669] RBP: ffff8d26cb419aec R08: 0000000000000228 R09: 0000000000000000
>> [ T669] R10: ffff8d26c516fdc0 R11: ffff8d26ca5a4aa0 R12: ffff8d26c1aed0c8
>> [ T669] R13: 0000000000000002 R14: ffffcec6c25cfa90 R15: ffff8d26c1aed000
>> [ T669] FS: 00007f690f71a980(0000) GS:ffff8d35e83fa000(0000) knlGS:0000000000000000
>> [ T669] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
>> [ T669] CR2: 0000000000000330 CR3: 0000000121b64000 CR4: 0000000000750ef0
>> [ T669] PKRU: 55555554
>> [ T669] Call Trace:
>> [ T669] <TASK>
>> [ T669] msix_setup_interrupts+0x23b/0x280
>
> Can you please decode the lines please via:
>
> scripts/faddr2line vmlinux msi_domain_first_desc+0x4/0x30
> scripts/faddr2line vmlinux msix_setup_interrupts+0x23b/0x280

Can you please also provide kernel configuration and compiler version?

Thanks,

tglx