linux-kernel - Re: [Bug][5.17-rc0] Between commits daadb3bd0e8d and 455e73a07f6e, the kernel stops loading on my devices.

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Date:   Tue, 18 Jan 2022 16:26:27 +0500
From:   Mikhail Gavrilov <mikhail.v.gavrilov@...il.com>
To:     Heikki Krogerus <heikki.krogerus@...ux.intel.com>
Cc:     Linux List Kernel Mailing <linux-kernel@...r.kernel.org>,
        rafael.j.wysocki@...el.com, linux-usb@...r.kernel.org
Subject: Re: [Bug][5.17-rc0] Between commits daadb3bd0e8d and 455e73a07f6e,
 the kernel stops loading on my devices.

On Mon, 17 Jan 2022 at 17:21, Heikki Krogerus
<heikki.krogerus@...ux.intel.com> wrote:
>
> Have you modified the file, or something else that you have not
> committed yet?
>
>         % git status
>
> Checkout the file, and then try to apply the patch:
>
>         % git checkout drivers/usb/typec/port-mapper.c
>         % git apply -v 0001-usb-typec-Test-fix.patch
>

I understood why the patch was not applied. The "Window line endings"
in the attached file were.

$ dos2unix 0001-usb-typec-Test-fix.patch
dos2unix: converting file 0001-usb-typec-Test-fix.patch to Unix format...
$ git apply -v 0001-usb-typec-Test-fix.patch
Checking patch drivers/usb/typec/port-mapper.c...
Applied patch drivers/usb/typec/port-mapper.c cleanly.

Unfortunately the attached patch didn't fix the issue.

 BUG: kernel NULL pointer dereference, address: 0000000000000008
 #PF: supervisor read access in kernel mode
 #PF: error_code(0x0000) - not-present page
 PGD 0 P4D 0
 Oops: 0000 [#1] PREEMPT SMP NOPTI
 CPU: 10 PID: 459 Comm: kworker/10:2 Not tainted
5.16.0-patched-455e73a07f6e+ #26
 Hardware name: ASUSTeK COMPUTER INC. ROG Strix G513QY_G513QY/G513QY,
BIOS G513QY.316 11/29/2021
 Workqueue: events_long ucsi_init_work [typec_ucsi]
 RIP: 0010:component_master_add_with_match+0x14/0x110
 Code: 72 d7 48 89 ef 5b 5d e9 1a 5c 9f ff 66 2e 0f 1f 84 00 00 00 00
00 0f 1f 44 00 00 41 55 49 89 fd 41 54 49 89 f4 55 53 48 89 d3 <48> 8b
72 08 48 3b 32 74 10 48 89 d7 e8 4b fd ff ff 85 c0 0f 85 bb
 RSP: 0018:ffffba4581837d90 EFLAGS: 00010282
 RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000000
 RDX: 0000000000000000 RSI: ffffffffc04f58d0 RDI: ffff9c5afe43a808
 RBP: ffff9c5a81076358 R08: 0000000000000001 R09: 0000000000000001
 R10: 0000000000000001 R11: 0000000000000000 R12: ffffffffc04f58d0
 R13: ffff9c5afe43a808 R14: ffff9c5afe43a808 R15: ffff9c5a832c4010
 FS:  0000000000000000(0000) GS:ffff9c5d88a00000(0000) knlGS:0000000000000000
 CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
 CR2: 0000000000000008 CR3: 00000002e5028000 CR4: 0000000000750ee0
 PKRU: 55555554
 Call Trace:
  <TASK>
  typec_link_ports+0x5d/0x70 [typec]
  typec_register_port+0x1e6/0x2e0 [typec]
  ucsi_init_work+0x463/0x840 [typec_ucsi]
  process_one_work+0x2bb/0x600
  worker_thread+0x55/0x3b0
  ? process_one_work+0x600/0x600
  kthread+0x17c/0x1a0
  ? set_kthread_struct+0x40/0x40
  ret_from_fork+0x22/0x30
  </TASK>
 Modules linked in: hid_multitouch crct10dif_pclmul hid_asus
crc32_pclmul crc32c_intel asus_wmi sparse_keymap nvme
ghash_clmulni_intel platform_profile drm_ttm_helper ttm serio_raw
rfkill nvme_core ccp ucsi_acpi sp5100_tco r8169 iommu_v2 typec_ucsi i
i2c_hid ipmi_devintf ipmi_msghandler fuse
 CR2: 0000000000000008
 ---[ end trace 464b80635f62ac4e ]---
 RIP: 0010:component_master_add_with_match+0x14/0x110
 Code: 72 d7 48 89 ef 5b 5d e9 1a 5c 9f ff 66 2e 0f 1f 84 00 00 00 00
00 0f 1f 44 00 00 41 55 49 89 fd 41 54 49 89 f4 55 53 48 89 d3 <48> 8b
72 08 48 3b 32 74 10 48 89 d7 e8 4b fd ff ff 85 c0 0f 85 bb
 RSP: 0018:ffffba4581837d90 EFLAGS: 00010282
 RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000000
 RDX: 0000000000000000 RSI: ffffffffc04f58d0 RDI: ffff9c5afe43a808
 RBP: ffff9c5a81076358 R08: 0000000000000001 R09: 0000000000000001
 R10: 0000000000000001 R11: 0000000000000000 R12: ffffffffc04f58d0
 R13: ffff9c5afe43a808 R14: ffff9c5afe43a808 R15: ffff9c5a832c4010
 FS:  0000000000000000(0000) GS:ffff9c5d88a00000(0000) knlGS:0000000000000000
 CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
 CR2: 0000000000000008 CR3: 00000002e5028000 CR4: 0000000000750ee0
 PKRU: 55555554

-- 
Best Regards,
Mike Gavrilov.

View attachment "kernel-log.txt" of type "text/plain" (420663 bytes)