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Message-ID:
<DM4PR12MB50863789A621575F937E240F89922@DM4PR12MB5086.namprd12.prod.outlook.com>
Date: Mon, 2 Sep 2024 18:56:01 +0000
From: "V, Narasimhan" <Narasimhan.V@....com>
To: Thomas Zimmermann <tzimmermann@...e.de>
CC: Linux Next Mailing List <linux-next@...r.kernel.org>, Daniel Vetter
<daniel@...ll.ch>, Helge Deller <deller@....de>,
"linux-fbdev@...r.kernel.org" <linux-fbdev@...r.kernel.org>,
"dri-devel@...ts.freedesktop.org" <dri-devel@...ts.freedesktop.org>, open
list <linux-kernel@...r.kernel.org>, "linux@...ssschuh.net"
<linux@...ssschuh.net>, Borislav Petkov <bp@...en8.de>, Helge Deller
<deller@....de>
Subject: Re: WARNING: CPU: 0 PID: 8 at drivers/video/fbdev/core/fbmem.c:467
unregister_framebuffer+0x45/0x160
[AMD Official Use Only - AMD Internal Distribution Only]
Hi,
________________________________________
From: Thomas Zimmermann <tzimmermann@...e.de>
Sent: Monday, September 2, 2024 05:11 PM
To: Borislav Petkov; V, Narasimhan
Cc: Linux Next Mailing List; Daniel Vetter; Helge Deller; linux-fbdev@...r.kernel.org; dri-devel@...ts.freedesktop.org; open list
Subject: Re: WARNING: CPU: 0 PID: 8 at drivers/video/fbdev/core/fbmem.c:467 unregister_framebuffer+0x45/0x160
>Hi
> Am 02.09.24 um 10:45 schrieb Borislav Petkov:
>> Fixing subject and recipients and leaving the whole mail untouched.
>>
>> On Sun, Sep 01, 2024 at 05:01:28PM +0200, V, Narasimhan wrote:
>>> [AMD Official Use Only - AMD Internal Distribution Only]
>>>
>>> Hi,
>>>
>>> Seeing the following warning and bug on boot with linux-next-20240829
>>>
>>> WARNING: CPU: 0 PID: 8 at drivers/video/fbdev/core/fbmem.c:467 unregister_framebuffer+0x45/0x160
>>> BUG: kernel NULL pointer dereference, address: 0000000000000000
>Does it work if you revert one of these commits?
> b49420d6a1ae ("video/aperture: optionally match the device in
>sysfb_disable()")
> c2fe0480cd77 ("fbdev/efifb: Use devm_register_framebuffer()")
Reverting this commit fixes the issue.
> For the latter, there might be a fix at
> https://patchwork.freedesktop.org/patch/611902/?series=138008&rev=1
> Best regards
> Thomas
--
Regards
Narasimhan V
>>
>>
>>
>> 19:07:54 [ 18.395285] WARNING: CPU: 0 PID: 8 at drivers/video/fbdev/core/fbmem.c:467 unregister_framebuffer+0x45/0x160
>> 19:07:54 [ 18.406264] Modules linked in: ast(+) i2c_algo_bit drm_shmem_helper crct10dif_pclmul crc32_pclmul drm_kms_helper ghash_clmulni_intel sha256_ssse3 drm tg3 nvme sha1_ssse3 ahci i2c_piix4 libahci i2c_smbus nvme_core aesni_intel crypto_simd cryptd
>> 19:07:54 [ 18.430347] CPU: 0 UID: 0 PID: 8 Comm: kworker/0:0 Not tainted 6.11.0-rc5-next-20240830-1725196918033 #1
>> 19:07:54 [ 18.440929] Hardware name: AMD Corporation Shale96/Shale96, BIOS RSH100BD 12/11/2023
>> 19:07:54 [ 18.449572] Workqueue: events work_for_cpu_fn
>> 19:07:54 [ 18.454435] RIP: 0010:unregister_framebuffer+0x45/0x160
>> 19:07:54 [ 18.460267] Code: 83 ec 08 e8 7d 4a 76 00 49 63 44 24 04 83 f8 1f 77 18 48 83 f8 1f 0f 87 d6 00 00 00 4c 3b 24 c5 80 76 a7 83 0f 84 85 00 00 00 <0f> 0b 49 8b bc 24 d0 01 00 00 48 85 ff 74 0b 41 f6 84 24 ec 01 00
>> 19:07:54 [ 18.481224] RSP: 0018:ff56f06f800efb50 EFLAGS: 00010286
>> 19:07:54 [ 18.487058] RAX: 0000000000000000 RBX: ff2d2a8913c77a40 RCX: ff2d2a8913c77400
>> 19:07:54 [ 18.495023] RDX: ff2d2a8900956000 RSI: ff2d2a8913c77428 RDI: ffffffff83918360
>> 19:07:54 [ 18.502987] RBP: ff56f06f800efb68 R08: ffffffff82dce06a R09: 0000000000000010
>> 19:07:54 [ 18.510950] R10: ff2d2a8913cfc2b0 R11: 0000000000000004 R12: ff2d2a8913cffc00
>> 19:07:54 [ 18.518911] R13: ff56f06f800efbd0 R14: ff2d2a8913cfc010 R15: 0000000000000202
>> 19:07:54 [ 18.526873] FS: 0000000000000000(0000) GS:ff2d2a980ba00000(0000) knlGS:0000000000000000
>> 19:07:54 [ 18.535903] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
>> 19:07:54 [ 18.542312] CR2: 0000558d19347c98 CR3: 000000011827a006 CR4: 0000000000771ef0
>> 19:07:54 [ 18.550275] PKRU: 55555554
>> 19:07:54 [ 18.553293] Call Trace:
>> 19:07:54 [ 18.556016] <TASK>
>> 19:07:54 [ 18.558354] ? show_regs+0x6d/0x80
>> 19:07:54 [ 18.562153] ? __warn+0x91/0x140
>> 19:07:54 [ 18.565756] ? unregister_framebuffer+0x45/0x160
>> 19:07:54 [ 18.570917] ? report_bug+0x193/0x1a0
>> 19:07:54 [ 18.575008] ? handle_bug+0x63/0xa0
>> 19:07:54 [ 18.578901] ? exc_invalid_op+0x1d/0x80
>> 19:07:54 [ 18.583181] ? asm_exc_invalid_op+0x1f/0x30
>> 19:07:54 [ 18.587842] ? unregister_framebuffer+0x45/0x160
>> 19:07:54 [ 18.592994] devm_unregister_framebuffer+0x12/0x20
>> 19:07:54 [ 18.598338] devm_action_release+0x16/0x20
>> 19:07:54 [ 18.602910] release_nodes+0x47/0xc0
>> 19:07:54 [ 18.606898] devres_release_all+0x9f/0xe0
>> 19:07:54 [ 18.611371] device_unbind_cleanup+0x12/0x80
>> 19:07:54 [ 18.616136] device_release_driver_internal+0x20c/0x250
>> 19:07:54 [ 18.621967] ? srso_alias_return_thunk+0x5/0xfbef5
>> 19:07:54 [ 18.627315] device_release_driver+0x16/0x20
>> 19:07:54 [ 18.632079] bus_remove_device+0xcf/0x130
>> 19:07:54 [ 18.636551] device_del+0x16a/0x3c0
>> 19:07:54 [ 18.640444] ? srso_alias_return_thunk+0x5/0xfbef5
>> 19:07:54 [ 18.645791] platform_device_del.part.0+0x18/0x90
>> 19:07:54 [ 18.651042] platform_device_unregister+0x24/0x40
>> 19:07:54 [ 18.656303] sysfb_disable+0x5c/0xa0
>> 19:07:54 [ 18.660296] aperture_remove_conflicting_pci_devices+0x33/0x140
>> 19:07:54 [ 18.666907] drm_aperture_remove_conflicting_pci_framebuffers+0x19/0x20 [drm]
>> 19:07:54 [ 18.674886] ast_pci_probe+0x2c/0x540 [ast]
>> 19:07:54 [ 18.679556] ? srso_alias_return_thunk+0x5/0xfbef5
>> 19:07:54 [ 18.684904] local_pci_probe+0x4c/0xb0
>> 19:07:54 [ 18.689087] work_for_cpu_fn+0x1b/0x30
>> 19:07:54 [ 18.693271] process_one_work+0x17a/0x3b0
>> 19:07:54 [ 18.697745] worker_thread+0x2a0/0x3a0
>> 19:07:54 [ 18.701927] ? __pfx_worker_thread+0x10/0x10
>> 19:07:54 [ 18.706688] kthread+0xe5/0x120
>> 19:07:54 [ 18.710192] ? __pfx_kthread+0x10/0x10
>> 19:07:54 [ 18.714375] ret_from_fork+0x3d/0x60
>> 19:07:54 [ 18.718363] ? __pfx_kthread+0x10/0x10
>> 19:07:54 [ 18.722544] ret_from_fork_asm+0x1a/0x30
>> 19:07:54 [ 18.726923] </TASK>
>> 19:07:54 [ 18.729359] ---[ end trace 0000000000000000 ]---
>> 09:13:40 [ 18.100937] BUG: kernel NULL pointer dereference, address: 0000000000000000
>> 09:13:40 [ 18.108694] #PF: supervisor read access in kernel mode
>> 09:13:40 [ 18.114424] #PF: error_code(0x0000) - not-present page
>> 09:13:40 [ 18.120153] PGD 1156fa067 P4D 0
>> 09:13:40 [ 18.123751] Oops: Oops: 0000 [#1] PREEMPT SMP NOPTI
>> 09:13:40 [ 18.129194] CPU: 0 UID: 0 PID: 458 Comm: kworker/0:2 Tainted: G W 6.11.0-rc5-next-20240829-1725075030567 #1
>> 09:13:40 [ 18.141618] Tainted: [W]=WARN
>> 09:13:40 [ 18.144922] Hardware name: AMD Corporation Shale96/Shale96, BIOS RSH100BD 12/11/2023
>> 09:13:40 [ 18.153551] Workqueue: events work_for_cpu_fn
>> 09:13:40 [ 18.158412] RIP: 0010:fb_destroy_modelist+0x1a/0x70
>> 09:13:40 [ 18.163853] Code: 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 f3 0f 1e fa 0f 1f 44 00 00 55 48 89 e5 41 56 41 55 41 54 49 89 fc 53 48 8b 3f <48> 8b 1f 49 39 fc 74 36 49 be 00 01 00 00 00 00 ad de 49 bd 22 01
>> 09:13:40 [ 18.184809] RSP: 0018:ff42b545c14e7b20 EFLAGS: 00010246
>> 09:13:40 [ 18.190638] RAX: 0000000000000000 RBX: ff2cd8a142f7ce00 RCX: ff2cd8a142f7cf00
>> 09:13:40 [ 18.198597] RDX: ff2cd8b088b74000 RSI: ff2cd8a142f7cf28 RDI: 0000000000000000
>> 09:13:40 [ 18.206557] RBP: ff42b545c14e7b40 R08: ffffffff907cca2c R09: 0000000000000010
>> 09:13:40 [ 18.214520] R10: ff2cd8a142fb06b0 R11: 0000000000000004 R12: ff2cd8a142fb5288
>> 09:13:40 [ 18.222480] R13: ff42b545c14e7bd0 R14: ff2cd8a142fb0410 R15: 0000000000000283
>> 09:13:40 [ 18.230440] FS: 0000000000000000(0000) GS:ff2cd8b046600000(0000) knlGS:0000000000000000
>> 09:13:40 [ 18.239466] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
>> 09:13:40 [ 18.245874] CR2: 0000000000000000 CR3: 00000001156cc005 CR4: 0000000000771ef0
>> 09:13:40 [ 18.253836] PKRU: 55555554
>> 09:13:40 [ 18.256851] Call Trace:
>> 09:13:40 [ 18.259573] <TASK>
>> 09:13:40 [ 18.261901] ? show_regs+0x6d/0x80
>> 09:13:40 [ 18.265695] ? __die+0x29/0x70
>> 09:13:40 [ 18.269098] ? page_fault_oops+0x15c/0x550
>> 09:13:40 [ 18.273664] ? unregister_framebuffer+0x45/0x160
>> 09:13:40 [ 18.278813] ? srso_alias_return_thunk+0x5/0xfbef5
>> 09:13:40 [ 18.284157] ? vprintk+0x3f/0x70
>> 09:13:40 [ 18.287755] ? srso_alias_return_thunk+0x5/0xfbef5
>> 09:13:40 [ 18.293097] ? _printk+0x5c/0x80
>> 09:13:40 [ 18.296699] ? do_user_addr_fault+0x47a/0x7e0
>> 09:13:40 [ 18.301559] ? __warn+0xbc/0x140
>> 09:13:40 [ 18.305158] ? unregister_framebuffer+0x45/0x160
>> 09:13:40 [ 18.310307] ? exc_page_fault+0x7c/0x1b0
>> 09:13:40 [ 18.314680] ? asm_exc_page_fault+0x2b/0x30
>> 09:13:40 [ 18.319347] ? fb_destroy_modelist+0x1a/0x70
>> 09:13:40 [ 18.324107] unregister_framebuffer+0x6c/0x160
>> 09:13:40 [ 18.329063] devm_unregister_framebuffer+0x12/0x20
>> 09:13:40 [ 18.334408] devm_action_release+0x16/0x20
>> 09:13:40 [ 18.338978] release_nodes+0x47/0xc0
>> 09:13:40 [ 18.342965] devres_release_all+0x9f/0xe0
>> 09:13:40 [ 18.347436] device_unbind_cleanup+0x12/0x80
>> 09:13:40 [ 18.352196] device_release_driver_internal+0x20c/0x250
>> 09:13:40 [ 18.358024] ? srso_alias_return_thunk+0x5/0xfbef5
>> 09:13:40 [ 18.363367] device_release_driver+0x16/0x20
>> 09:13:40 [ 18.368128] bus_remove_device+0xcf/0x130
>> 09:13:40 [ 18.372599] device_del+0x16a/0x3c0
>> 09:13:40 [ 18.376488] ? srso_alias_return_thunk+0x5/0xfbef5
>> 09:13:40 [ 18.381837] platform_device_del.part.0+0x18/0x90
>> 09:13:40 [ 18.387086] platform_device_unregister+0x24/0x40
>> 09:13:40 [ 18.392330] sysfb_disable+0x5c/0xa0
>> 09:13:40 [ 18.396316] aperture_remove_conflicting_pci_devices+0x33/0x140
>> 09:13:40 [ 18.402921] drm_aperture_remove_conflicting_pci_framebuffers+0x19/0x20 [drm]
>> 09:13:40 [ 18.410899] ast_pci_probe+0x2c/0x540 [ast]
>> 09:13:40 [ 18.415566] ? srso_alias_return_thunk+0x5/0xfbef5
>> 09:13:40 [ 18.420914] local_pci_probe+0x4c/0xb0
>> 09:13:40 [ 18.425095] work_for_cpu_fn+0x1b/0x30
>> 09:13:40 [ 18.429277] process_one_work+0x17a/0x3b0
>> 09:13:40 [ 18.433746] ? __pfx_worker_thread+0x10/0x10
>> 09:13:40 [ 18.438507] worker_thread+0x2a0/0x3a0
>> 09:13:40 [ 18.442685] ? __pfx_worker_thread+0x10/0x10
>> 09:13:40 [ 18.447445] kthread+0xe5/0x120
>> 09:13:40 [ 18.450946] ? __pfx_kthread+0x10/0x10
>> 09:13:40 [ 18.455125] ret_from_fork+0x3d/0x60
>> 09:13:40 [ 18.459112] ? __pfx_kthread+0x10/0x10
>> 09:13:40 [ 18.463293] ret_from_fork_asm+0x1a/0x30
>> 09:13:44 [ 18.467673] </TASK>
>> 09:13:44 [ 18.470106] Modules linked in: ast(+) i2c_algo_bit drm_shmem_helper crct10dif_pclmul crc32_pclmul drm_kms_helper ghash_clmulni_intel sha256_ssse3 drm sha1_ssse3 nvme i2c_piix4 tg3 ahci nvme_core i2c_smbus libahci aesni_intel crypto_simd cryptd
>> 09:13:44 [ 18.494181] CR2: 0000000000000000
>> 09:13:44 [ 18.497876] ---[ end trace 0000000000000000 ]---
>>
>> --
>> Regards
>> Narasimhan V
>>
--
--
Thomas Zimmermann
Graphics Driver Developer
SUSE Software Solutions Germany GmbH
Frankenstrasse 146, 90461 Nuernberg, Germany
GF: Ivo Totev, Andrew Myers, Andrew McDonald, Boudien Moerman
HRB 36809 (AG Nuernberg)
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