Bug#1117002: linux-image-6.12.48+deb13-amd64: warning in arch/x86/kernel/cpu/cpuid-deps.c:117 do_clear_cpu_cap on Intel Atom N450
Control: tags -1 + moreinfo
On Thu, Oct 02, 2025 at 07:05:55AM +0200, Laurentiu Pancescu wrote:
> Package: src:linux
> Version: 6.12.48-1
> Severity: normal
> X-Debbugs-Cc: lpancescu@gmail.com
>
> Dear Maintainer,
>
> I'm getting the following warning on the current stable kernel (oldstable doesn't show this issue):
>
> ct 02 06:15:53 snowbell kernel: WARNING: CPU: 1 PID: 0 at arch/x86/kernel/cpu/cpuid-deps.c:117 do_clear_cpu_cap+0xde/0x130
> Oct 02 06:15:53 snowbell kernel: Modules linked in:
> Oct 02 06:15:53 snowbell kernel: CPU: 1 UID: 0 PID: 0 Comm: swapper/1 Not tainted 6.12.48+deb13-amd64 #1 Debian 6.12.48-1
> Oct 02 06:15:53 snowbell kernel: Hardware name: ASUSTeK Computer INC. 1005PE/1005P, BIOS 1202 06/23/2010
> Oct 02 06:15:53 snowbell kernel: RIP: 0010:do_clear_cpu_cap+0xde/0x130
> Oct 02 06:15:53 snowbell kernel: Code: 24 60 65 48 2b 04 25 28 00 00 00 75 67 48 83 c4 68 5b 5d 41 5c 41 5d c3 cc cc cc cc 8b 15 4a 46 e0 01 85 d2 0f 84 6e ff ff ff <0f> 0b e9 67 ff ff ff 48 c7 c7 20 36 86 ac e8 0f ff ff ff f0 4c 0f
> Oct 02 06:15:53 snowbell kernel: RSP: 0000:ffffade7c00d7e10 EFLAGS: 00010002
> Oct 02 06:15:53 snowbell kernel: RAX: 0000000000000000 RBX: ffffade7c00d7e10 RCX: 0000000000000000
> Oct 02 06:15:53 snowbell kernel: RDX: 0000000000000001 RSI: 0000000000000070 RDI: ffffade7c00d7e70
> Oct 02 06:15:53 snowbell kernel: RBP: 0000000000000070 R08: 0000000000000000 R09: ffffade7c00d7c70
> Oct 02 06:15:53 snowbell kernel: R10: ffffffffac6b43a8 R11: 0000000000000003 R12: 0000000000000000
> Oct 02 06:15:53 snowbell kernel: R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000
> Oct 02 06:15:53 snowbell kernel: FS: 0000000000000000(0000) GS:ffff9ba83d500000(0000) knlGS:0000000000000000
> Oct 02 06:15:53 snowbell kernel: CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
> Oct 02 06:15:53 snowbell kernel: CR2: 0000000000000000 CR3: 000000006d822000 CR4: 00000000000006f0
> Oct 02 06:15:53 snowbell kernel: Call Trace:
> Oct 02 06:15:53 snowbell kernel: <TASK>
> Oct 02 06:15:53 snowbell kernel: early_init_intel.cold+0x34/0x10c
> Oct 02 06:15:53 snowbell kernel: init_intel+0x27/0x360
> Oct 02 06:15:53 snowbell kernel: identify_cpu+0x15e/0x5d0
> Oct 02 06:15:53 snowbell kernel: identify_secondary_cpu+0x12/0x40
> Oct 02 06:15:53 snowbell kernel: smp_store_cpu_info+0x49/0x60
> Oct 02 06:15:53 snowbell kernel: start_secondary+0x7f/0x140
> Oct 02 06:15:53 snowbell kernel: common_startup_64+0x13e/0x141
> Oct 02 06:15:53 snowbell kernel: </TASK>
> Oct 02 06:15:53 snowbell kernel: ---[ end trace 0000000000000000 ]---
> Oct 02 06:15:53 snowbell kernel: ------------[ cut here ]------------
> Oct 02 06:15:53 snowbell kernel: WARNING: CPU: 1 PID: 0 at arch/x86/kernel/cpu/cpuid-deps.c:117 do_clear_cpu_cap+0xde/0x130
> Oct 02 06:15:53 snowbell kernel: Modules linked in:
> Oct 02 06:15:53 snowbell kernel: CPU: 1 UID: 0 PID: 0 Comm: swapper/1 Tainted: G W 6.12.48+deb13-amd64 #1 Debian 6.12.48-1
> Oct 02 06:15:53 snowbell kernel: Tainted: [W]=WARN
> Oct 02 06:15:53 snowbell kernel: Hardware name: ASUSTeK Computer INC. 1005PE/1005P, BIOS 1202 06/23/2010
> Oct 02 06:15:53 snowbell kernel: RIP: 0010:do_clear_cpu_cap+0xde/0x130
> Oct 02 06:15:53 snowbell kernel: Code: 24 60 65 48 2b 04 25 28 00 00 00 75 67 48 83 c4 68 5b 5d 41 5c 41 5d c3 cc cc cc cc 8b 15 4a 46 e0 01 85 d2 0f 84 6e ff ff ff <0f> 0b e9 67 ff ff ff 48 c7 c7 20 36 86 ac e8 0f ff ff ff f0 4c 0f
> Oct 02 06:15:53 snowbell kernel: RSP: 0000:ffffade7c00d7d80 EFLAGS: 00010002
> Oct 02 06:15:53 snowbell kernel: RAX: 0000000000000000 RBX: ffffade7c00d7d80 RCX: 0000000000000000
> Oct 02 06:15:53 snowbell kernel: RDX: 0000000000000001 RSI: 0000000000000070 RDI: ffffade7c00d7de0
> Oct 02 06:15:53 snowbell kernel: RBP: 0000000000000070 R08: 0000000000000000 R09: ffffade7c00d7c70
> Oct 02 06:15:53 snowbell kernel: R10: ffffffffac6b43a8 R11: 0000000000000003 R12: ffffffffac863620
> Oct 02 06:15:53 snowbell kernel: R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000
> Oct 02 06:15:53 snowbell kernel: FS: 0000000000000000(0000) GS:ffff9ba83d500000(0000) knlGS:0000000000000000
> Oct 02 06:15:53 snowbell kernel: CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
> Oct 02 06:15:53 snowbell kernel: CR2: 0000000000000000 CR3: 000000006d822000 CR4: 00000000000006f0
> Oct 02 06:15:53 snowbell kernel: Call Trace:
> Oct 02 06:15:53 snowbell kernel: <TASK>
> Oct 02 06:15:53 snowbell kernel: do_clear_cpu_cap+0x108/0x130
> Oct 02 06:15:53 snowbell kernel: early_init_intel.cold+0x34/0x10c
> Oct 02 06:15:53 snowbell kernel: init_intel+0x27/0x360
> Oct 02 06:15:53 snowbell kernel: identify_cpu+0x15e/0x5d0
> Oct 02 06:15:53 snowbell kernel: identify_secondary_cpu+0x12/0x40
> Oct 02 06:15:53 snowbell kernel: smp_store_cpu_info+0x49/0x60
> Oct 02 06:15:53 snowbell kernel: start_secondary+0x7f/0x140
> Oct 02 06:15:53 snowbell kernel: common_startup_64+0x13e/0x141
> Oct 02 06:15:53 snowbell kernel: </TASK>
> Oct 02 06:15:53 snowbell kernel: ---[ end trace 0000000000000000 ]---
Thanks for providing the full dmesg as well in he additional message.
This is quite an old system. Can you please provide us as well the
full dmesg while booting the most recent kernel in unstable available?
6.16.11-1 (as of this writing).
I would be interested to see if it warns about unmet CPU feature
dependencies.
Regards,
Salvatore
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