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Date: Tue, 25 Jan 2022 14:08:53 +0100
From: Paul Menzel <pmenzel@...gen.mpg.de>
To: Mika Westerberg <mika.westerberg@...ux.intel.com>,
Zha Qipeng <qipeng.zha@...el.com>
Cc: linux-kernel@...r.kernel.org
Subject: mfd/intel_pmc_bxt: `intel_pmc_get_resources()` results in page fault
Dear Linux folks,
`intel_pmc_get_resources()` does not set the name member in the
`resource` struct `gcr_res` resulting in a page fault.
```
[ 0.592954] Run /init as init process
[ 0.594199] with arguments:
[ 0.594201] /init
[ 0.594203] with environment:
[ 0.594204] HOME=/
[ 0.594205] TERM=linux
[ 0.594206] BOOT_IMAGE=/boot/vmlinuz-5.13.0-27-generic
[ 0.792277] BUG: unable to handle page fault for address:
ffffffff00000dc0
[ 0.794072] #PF: supervisor read access in kernel mode
[ 0.795873] #PF: error_code(0x0000) - not-present page
[ 0.797698] PGD 107e15067 P4D 107e15067 PUD 0
[ 0.799514] Oops: 0000 [#1] SMP PTI
[ 0.801344] CPU: 2 PID: 182 Comm: systemd-udevd Not tainted
5.13.0-27-generic #29~20.04.1-Ubuntu
[ 0.803202] Hardware name: Star Labs Lite/Lite, BIOS 8 01/24/2022
[ 0.805041] RIP: 0010:string_nocheck+0x38/0x60
[ 0.806918] Code: 66 85 c0 74 3e 83 e8 01 4c 8d 5c 07 01 31 c0 eb 19
49 39 fa 76 03 44 88 07 48 83 c7 01 41 8d 71 01 48 83 c0 01 4c 39 df 74
0f <44> 0f b6 04 02 41 89 c1 89 c6 45 84 c0 75 d8 4c 89 d2 e8 11 ff ff
[ 0.808908] RSP: 0018:ffffb6d58056b7d0 EFLAGS: 00010246
[ 0.810881] RAX: 0000000000000000 RBX: ffffb6d58056b870 RCX:
ffff0a00ffffff04
[ 0.812850] RDX: ffffffff00000dc0 RSI: 0000000000000000 RDI:
000000000000000b
[ 0.814777] RBP: ffffb6d58056b7d0 R08: ffffffff9b61ba58 R09:
000000000000000a
[ 0.816732] R10: 0000000000000000 R11: 000000010000000a R12:
0000000000000000
[ 0.818605] R13: ffffffff00000dc0 R14: ffff0a00ffffff04 R15:
000000000000000b
[ 0.820559] FS: 00007fd48008b880(0000) GS:ffff9324fc100000(0000)
knlGS:0000000000000000
[ 0.822536] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 0.824499] CR2: ffffffff00000dc0 CR3: 0000000101dbe000 CR4:
0000000000350ee0
[ 0.826477] Call Trace:
[ 0.828434] string+0x4a/0x60
[ 0.830387] vsnprintf+0x26f/0x4e0
[ 0.832346] devm_kvasprintf+0x55/0xb0
[ 0.834288] devm_kasprintf+0x4e/0x70
[ 0.836216] __devm_ioremap_resource+0x7e/0x110
[ 0.838158] devm_ioremap_resource+0xb/0x10
[ 0.840097] intel_pmc_get_resources.isra.0+0x9e/0x430 [intel_pmc_bxt]
[ 0.842028] ? devres_add+0x5f/0x70
[ 0.843945] intel_pmc_probe+0x76/0x170 [intel_pmc_bxt]
[ 0.845808] platform_probe+0x45/0xa0
[ 0.847673] really_probe+0x1dc/0x440
[ 0.849520] driver_probe_device+0xf0/0x160
[ 0.851304] device_driver_attach+0x5d/0x70
[ 0.853031] __driver_attach+0xb2/0x140
[ 0.854842] ? device_driver_attach+0x70/0x70
[ 0.856647] bus_for_each_dev+0x7e/0xc0
[ 0.858457] driver_attach+0x1e/0x20
[ 0.860228] bus_add_driver+0x152/0x1f0
[ 0.862014] driver_register+0x74/0xd0
[ 0.863707] ? 0xffffffffc0189000
[ 0.865406] __platform_driver_register+0x1e/0x20
[ 0.867098] intel_pmc_driver_init+0x1c/0x1000 [intel_pmc_bxt]
[ 0.868774] do_one_initcall+0x46/0x1d0
[ 0.870449] ? __cond_resched+0x19/0x30
[ 0.872030] ? kmem_cache_alloc_trace+0x37c/0x440
[ 0.873697] do_init_module+0x62/0x260
[ 0.875308] load_module+0x125d/0x1440
[ 0.876983] __do_sys_finit_module+0xc2/0x120
[ 0.878675] ? __do_sys_finit_module+0xc2/0x120
[ 0.880365] __x64_sys_finit_module+0x1a/0x20
[ 0.882029] do_syscall_64+0x61/0xb0
[ 0.883734] ? __x64_sys_read+0x1a/0x20
[ 0.885422] ? do_syscall_64+0x6e/0xb0
[ 0.887152] ? do_syscall_64+0x6e/0xb0
[ 0.888875] ? syscall_exit_to_user_mode+0x27/0x50
[ 0.890542] ? __x64_sys_newstat+0x16/0x20
[ 0.892234] ? do_syscall_64+0x6e/0xb0
[ 0.893947] ? do_syscall_64+0x6e/0xb0
[ 0.895645] ? do_syscall_64+0x6e/0xb0
[ 0.897321] ? do_syscall_64+0x6e/0xb0
[ 0.898909] entry_SYSCALL_64_after_hwframe+0x44/0xae
[ 0.900587] RIP: 0033:0x7fd48060d89d
[ 0.902217] Code: 00 c3 66 2e 0f 1f 84 00 00 00 00 00 90 f3 0f 1e fa
48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f
05 <48> 3d 01 f0 ff ff 73 01 c3 48 8b 0d c3 f5 0c 00 f7 d8 64 89 01 48
[ 0.904009] RSP: 002b:00007ffe1f9e0058 EFLAGS: 00000246 ORIG_RAX:
0000000000000139
[ 0.905808] RAX: ffffffffffffffda RBX: 00005570f9be8830 RCX:
00007fd48060d89d
[ 0.907591] RDX: 0000000000000000 RSI: 00007fd4804eaded RDI:
0000000000000005
[ 0.909378] RBP: 0000000000020000 R08: 0000000000000000 R09:
0000000000000000
[ 0.911073] R10: 0000000000000005 R11: 0000000000000246 R12:
00007fd4804eaded
[ 0.912754] R13: 0000000000000000 R14: 00005570f9bdda60 R15:
00005570f9be8830
[ 0.914435] Modules linked in: fjes(+) hid(+) intel_pmc_bxt(+)
pinctrl_geminilake(+)
[ 0.916078] CR2: ffffffff00000dc0
[ 0.917705] ---[ end trace 81defb97a01a8ee4 ]---
[ 0.919288] RIP: 0010:string_nocheck+0x38/0x60
[ 0.920894] Code: 66 85 c0 74 3e 83 e8 01 4c 8d 5c 07 01 31 c0 eb 19
49 39 fa 76 03 44 88 07 48 83 c7 01 41 8d 71 01 48 83 c0 01 4c 39 df 74
0f <44> 0f b6 04 02 41 89 c1 89 c6 45 84 c0 75 d8 4c 89 d2 e8 11 ff ff
[ 0.922530] RSP: 0018:ffffb6d58056b7d0 EFLAGS: 00010246
[ 0.924126] RAX: 0000000000000000 RBX: ffffb6d58056b870 RCX:
ffff0a00ffffff04
[ 0.925753] RDX: ffffffff00000dc0 RSI: 0000000000000000 RDI:
000000000000000b
[ 0.927376] RBP: ffffb6d58056b7d0 R08: ffffffff9b61ba58 R09:
000000000000000a
[ 0.929043] R10: 0000000000000000 R11: 000000010000000a R12:
0000000000000000
[ 0.930689] R13: ffffffff00000dc0 R14: ffff0a00ffffff04 R15:
000000000000000b
[ 0.932281] FS: 00007fd48008b880(0000) GS:ffff9324fc100000(0000)
knlGS:0000000000000000
[ 0.933887] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 0.935477] CR2: ffffffff00000dc0 CR3: 0000000101dbe000 CR4:
0000000000350ee0
[ 0.941894] idma64 idma64.0: Found Intel integrated DMA 64-bit
[ 0.944318] ahci 0000:00:12.0: version 3.0
[ 0.952275] hid: raw HID events driver (C) Jiri Kosina
[ 0.952968] xhci_hcd 0000:00:15.0: xHCI Host Controller
[ 0.953622] idma64 idma64.1: Found Intel integrated DMA 64-bit
[ 0.954588] sdhci: Secure Digital Host Controller Interface driver
[ 0.955750] xhci_hcd 0000:00:15.0: new USB bus registered, assigned
bus number 1
```
Kind regards,
Paul
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