Greeting,
FYI, we noticed the following commit (built with clang-16):
commit: cad96c0b26e681c8b7de573371c0ec5cbe55fd58 ("x86/cpu: Remove segment load from switch_to_new_gdt()")
https://github.com/ammarfaizi2/linux-block tglx/devel/depthtracking
in testcase: boot
on test machine: qemu-system-x86_64 -enable-kvm -cpu SandyBridge -smp 2 -m 16G
caused below changes (please refer to attached dmesg/kmsg for entire log/backtrace):
+-------------------------------------------------+------------+------------+
| | 7c2bb42937 | cad96c0b26 |
+-------------------------------------------------+------------+------------+
| boot_successes | 22 | 0 |
| BUG:kernel_NULL_pointer_dereference,address | 0 | 25 |
| Oops:#[##] | 0 | 25 |
| EIP:__list_add_valid | 0 | 25 |
| Kernel_panic-not_syncing:Fatal_exception | 0 | 25 |
+-------------------------------------------------+------------+------------+
If you fix the issue, kindly add following tag
Reported-by: kernel test robot <[email protected]>
[ 0.137688][ T0] Initializing HighMem for node 0 (000ae5fe:00440000)
[ 0.138247][ T0] BUG: kernel NULL pointer dereference, address: 00000004
[ 0.138710][ T0] #PF: supervisor read access in kernel mode
[ 0.139089][ T0] #PF: error_code(0x0000) - not-present page
[ 0.139473][ T0] *pdpt = 0000000000000000 *pde = f000ff53f000ff53
[ 0.139897][ T0] Oops: 0000 [#1] SMP
[ 0.140153][ T0] CPU: 0 PID: 0 Comm: swapper Tainted: G T 5.19.0-00002-gcad96c0b26e6 #1
[ 0.140797][ T0] EIP: __list_add_valid+0x10/0xd0
[ 0.141122][ T0] Code: 01 eb ac 0f 0b 0f 0b 0f 0b 0f 0b 00 00 cc cc 00 00 cc cc 00 00 cc cc 00 00 cc 55 89 e5 53 57 56 83 ec 08 89 cf 89 d6 89 45
ec <8b> 59 04 31 d2 39 f3 0f 95 c2 b8 70 15 6a 42 31 c9 6a 00 e8 98 be
[ 0.142396][ T0] EAX: e79cbfc4 EBX: 00000000 ECX: 00000000 EDX: 428ee6a8
[ 0.142854][ T0] ESI: 428ee6a8 EDI: 00000000 EBP: 421a9e8c ESP: 421a9e78
[ 0.143311][ T0] DS: 007b ES: 007b FS: 00d8 GS: 0000 SS: 0068 EFLAGS: 00210016
[ 0.143802][ T0] CR0: 80050033 CR2: 00000004 CR3: 028fe000 CR4: 000406b0
[ 0.144259][ T0] DR0: 00000000 DR1: 00000000 DR2: 00000000 DR3: 00000000
[ 0.144718][ T0] DR6: fffe0ff0 DR7: 00000400
[ 0.145014][ T0] Call Trace:
[ 0.145229][ T0] ? free_unref_page_commit+0xa9/0x210
[ 0.145581][ T0] ? free_unref_page+0xc4/0x170
[ 0.145893][ T0] ? __free_pages+0x106/0x130
[ 0.146190][ T0] ? add_highpages_with_active_regions+0x185/0x22c
[ 0.146622][ T0] ? set_highmem_pages_init+0x51/0x75
[ 0.146968][ T0] ? set_highmem_pages_init+0x60/0x75
[ 0.147318][ T0] ? mem_init+0x10/0x127
[ 0.147588][ T0] ? mm_init+0x17/0x32
[ 0.147848][ T0] ? start_kernel+0x178/0x4ca
[ 0.148150][ T0] ? i386_start_kernel+0x219/0x21b
[ 0.148481][ T0] ? startup_32_smp+0x161/0x164
[ 0.148795][ T0] Modules linked in:
[ 0.149045][ T0] CR2: 0000000000000004
[ 0.149311][ T0] ---[ end trace 0000000000000000 ]---
[ 0.149661][ T0] EIP: __list_add_valid+0x10/0xd0
[ 0.149981][ T0] Code: 01 eb ac 0f 0b 0f 0b 0f 0b 0f 0b 00 00 cc cc 00 00 cc cc 00 00 cc cc 00 00 cc 55 89 e5 53 57 56 83 ec 08 89 cf 89 d6 89 45
ec <8b> 59 04 31 d2 39 f3 0f 95 c2 b8 70 15 6a 42 31 c9 6a 00 e8 98 be
[ 0.151254][ T0] EAX: e79cbfc4 EBX: 00000000 ECX: 00000000 EDX: 428ee6a8
[ 0.151708][ T0] ESI: 428ee6a8 EDI: 00000000 EBP: 421a9e8c ESP: 421a9e78
[ 0.152166][ T0] DS: 007b ES: 007b FS: 00d8 GS: 0000 SS: 0068 EFLAGS: 00210016
[ 0.152654][ T0] CR0: 80050033 CR2: 00000004 CR3: 028fe000 CR4: 000406b0
[ 0.153113][ T0] DR0: 00000000 DR1: 00000000 DR2: 00000000 DR3: 00000000
[ 0.153568][ T0] DR6: fffe0ff0 DR7: 00000400
[ 0.153865][ T0] Kernel panic - not syncing: Fatal exception
To reproduce:
# build kernel
cd linux
cp config-5.19.0-00002-gcad96c0b26e6 .config
make HOSTCC=clang-16 CC=clang-16 ARCH=i386 olddefconfig prepare modules_prepare bzImage modules
make HOSTCC=clang-16 CC=clang-16 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