linux-kernel - [tty] 710f5f9f70: BUG:kernel_NULL_pointer

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Message-ID: <20220506061924.GB23061@xsang-OptiPlex-9020>
Date:   Fri, 6 May 2022 14:19:24 +0800
From:   kernel test robot <oliver.sang@...el.com>
To:     Niklas Schnelle <schnelle@...ux.ibm.com>
Cc:     lkp@...ts.01.org, lkp@...el.com,
        LKML <linux-kernel@...r.kernel.org>
Subject: [tty]  710f5f9f70: BUG:kernel_NULL_pointer_dereference,address



Greeting,

FYI, we noticed the following commit (built with gcc-11):

commit: 710f5f9f706e680f2bc99cdbcd301a29ee784a7c ("tty: serial: handle HAS_IOPORT dependencies")
https://git.kernel.org/cgit/linux/kernel/git/niks/linux.git has_ioport_v3

in testcase: boot

on test machine: qemu-system-i386 -enable-kvm -cpu SandyBridge -smp 2 -m 4G

caused below changes (please refer to attached dmesg/kmsg for entire log/backtrace):


+---------------------------------------------+------------+------------+
|                                             | 41e9474656 | 710f5f9f70 |
+---------------------------------------------+------------+------------+
| boot_successes                              | 40         | 0          |
| boot_failures                               | 0          | 40         |
| BUG:kernel_NULL_pointer_dereference,address | 0          | 40         |
| Oops:#[##]                                  | 0          | 40         |
| Kernel_panic-not_syncing:Fatal_exception    | 0          | 40         |
+---------------------------------------------+------------+------------+


If you fix the issue, kindly add following tag
Reported-by: kernel test robot <oliver.sang@...el.com>


[    1.732701][    T0] printk: console [tty0] enabled
[    1.734232][    T0] BUG: kernel NULL pointer dereference, address: 00000000
[    1.736384][    T0] #PF: supervisor instruction fetch in kernel mode
[    1.738336][    T0] #PF: error_code(0x0010) - not-present page
[    1.740141][    T0] *pdpt = 0000000000000000 *pde = f000ff53f000ff53
[    1.741937][    T0] Oops: 0010 [#1] SMP PTI
[    1.743123][    T0] CPU: 0 PID: 0 Comm: swapper/0 Not tainted 5.18.0-rc4-00034-g710f5f9f706e #1
[    1.745451][    T0] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014
[    1.747901][    T0] EIP: 0x0
[    1.748934][    T0] Code: Unable to access opcode bytes at RIP 0xffffffd6.
[    1.751013][    T0] EAX: d932b940 EBX: d932b940 ECX: 00000000 EDX: 00000001
[    1.753142][    T0] ESI: 00000000 EDI: d8cedea4 EBP: d8cede8c ESP: d8cede60
[    1.755240][    T0] DS: 007b ES: 007b FS: 00d8 GS: 0000 SS: 0068 EFLAGS: 00210046
[    1.757298][    T0] CR0: 80050033 CR2: ffffffd6 CR3: 191f8000 CR4: 000006b0
[    1.759093][    T0] Call Trace:
[    1.760063][    T0]  serial8250_do_set_termios+0x248/0x4c0
[    1.761761][    T0]  ? serial8250_do_set_termios+0x4c0/0x4c0
[    1.763541][    T0]  serial8250_set_termios+0x25/0x40
[    1.765104][    T0]  uart_set_options+0xc4/0x140
[    1.766508][    T0]  serial8250_console_setup+0x82/0x180
[    1.768162][    T0]  univ8250_console_setup+0x3d/0x80
[    1.769712][    T0]  try_enable_preferred_console+0x95/0x140
[    1.771496][    T0]  register_console+0x5d/0x240
[    1.773067][    T0]  ? serial8250_isa_init_ports+0x170/0x170
[    1.774765][    T0]  register_console+0x4d/0x80
[    1.776204][    T0]  univ8250_console_init+0x20/0x2a
[    1.777786][    T0]  console_init+0xa8/0xdb
[    1.779153][    T0]  start_kernel+0x30f/0x46d
[    1.780564][    T0]  i386_start_kernel+0x48/0x4a
[    1.782074][    T0]  startup_32_smp+0x161/0x164
[    1.783613][    T0] Modules linked in:
[    1.784727][    T0] CR2: 0000000000000000
[    1.786035][    T0] ---[ end trace 0000000000000000 ]---
[    1.787589][    T0] EIP: 0x0
[    1.788542][    T0] Code: Unable to access opcode bytes at RIP 0xffffffd6.
[    1.790689][    T0] EAX: d932b940 EBX: d932b940 ECX: 00000000 EDX: 00000001
[    1.792752][    T0] ESI: 00000000 EDI: d8cedea4 EBP: d8cede8c ESP: d8cede60
[    1.794740][    T0] DS: 007b ES: 007b FS: 00d8 GS: 0000 SS: 0068 EFLAGS: 00210046
[    1.796913][    T0] CR0: 80050033 CR2: ffffffd6 CR3: 191f8000 CR4: 000006b0
[    1.798987][    T0] Kernel panic - not syncing: Fatal exception



To reproduce:

        # build kernel
	cd linux
	cp config-5.18.0-rc4-00034-g710f5f9f706e .config
	make HOSTCC=gcc-11 CC=gcc-11 ARCH=i386 olddefconfig prepare modules_prepare bzImage modules
	make HOSTCC=gcc-11 CC=gcc-11 ARCH=i386 INSTALL_MOD_PATH=<mod-install-dir> modules_install
	cd <mod-install-dir>
	find lib/ | cpio -o -H newc --quiet | gzip > modules.cgz


        git clone https://github.com/intel/lkp-tests.git
        cd lkp-tests
        bin/lkp qemu -k <bzImage> -m modules.cgz job-script # job-script is attached in this email

        # if come across any failure that blocks the test,
        # please remove ~/.lkp and /lkp dir to run from a clean state.



-- 
0-DAY CI Kernel Test Service
https://01.org/lkp



View attachment "config-5.18.0-rc4-00034-g710f5f9f706e" of type "text/plain" (141866 bytes)

View attachment "job-script" of type "text/plain" (4653 bytes)

Download attachment "dmesg.xz" of type "application/x-xz" (5252 bytes)