Re: [PATCH 3/6] x86/entry/vdso32: remove int80_landing_pad

[kernel test robot <oliver.sang@intel.com>]

Hello,

kernel test robot noticed "segfault_at_ip_sp_error" on:

commit: 19009b8428dfbeea0ecf043c063cf3336282eb2b ("[PATCH 3/6] x86/entry/vdso32: remove int80_landing_pad")
url: https://github.com/intel-lab-lkp/linux/commits/H-Peter-Anvin/x86-entry-vdso-rename-vdso_image_-to-vdso-_image/20251027-061505
base: https://git.kernel.org/cgit/linux/kernel/git/tip/tip.git ad74016b919cbad78d203fa1c459ae18e73ce586
patch link: https://lore.kernel.org/all/20251026221208.1938173-4-hpa@zytor.com/
patch subject: [PATCH 3/6] x86/entry/vdso32: remove int80_landing_pad

in testcase: boot

config: i386-randconfig-002-20251027
compiler: gcc-14
test machine: qemu-system-i386 -enable-kvm -cpu SandyBridge -smp 2 -m 4G

(please refer to attached dmesg/kmsg for entire log/backtrace)


+-----------------------------------------------------------+------------+------------+
|                                                           | 28c61beafa | 19009b8428 |
+-----------------------------------------------------------+------------+------------+
| boot_successes                                            | 6          | 0          |
| boot_failures                                             | 0          | 6          |
| segfault_at_ip_sp_error                                   | 0          | 6          |
| Kernel_panic-not_syncing:Attempted_to_kill_init!exitcode= | 0          | 6          |
+-----------------------------------------------------------+------------+------------+


If you fix the issue in a separate patch/commit (i.e. not just a new version of
the same patch/commit), kindly add following tags
| Reported-by: kernel test robot <oliver.sang@intel.com>
| Closes: https://lore.kernel.org/oe-lkp/202510281407.1fbe8f8b-lkp@intel.com


[   12.230099][    T1]     selinux=0
[   12.230498][    T1]     prompt_ramdisk=0
[   12.230942][    T1]     vga=normal
[   12.231367][    T1]     audit=0
[   12.231748][    T1]     ia32_emulation=on
[   12.246128][    T1] init[1]: segfault at 1 ip 37fad006 sp 3fb8051f error 6 likely on CPU 0 (core 0, socket 0)
[   12.247169][    T1] Code: Unable to access opcode bytes at 0x37facfdc.

Code starting with the faulting instruction
===========================================
[   12.247782][    T1] Kernel panic - not syncing: Attempted to kill init! exitcode=0x0000000b
[   12.248459][    T1] CPU: 0 UID: 0 PID: 1 Comm: init Not tainted 6.18.0-rc1-00004-g19009b8428df #1 PREEMPT(lazy)  515832f7b4d7c2dccd9418532bf066894e2da3fd
[   12.249461][    T1] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.16.3-debian-1.16.3-2 04/01/2014
[   12.250250][    T1] Call Trace:
[   12.250556][    T1]  ? dump_stack_lvl (kbuild/src/consumer/lib/dump_stack.c:122)
[   12.250943][    T1]  ? dump_stack (kbuild/src/consumer/lib/dump_stack.c:130)
[   12.251324][    T1]  ? vpanic (kbuild/src/consumer/kernel/panic.c:404 kbuild/src/consumer/kernel/panic.c:511)
[   12.251677][    T1]  ? panic (kbuild/src/consumer/kernel/panic.c:365)
[   12.252001][    T1]  ? do_exit.cold (kbuild/src/consumer/kernel/exit.c:1027)


The kernel config and materials to reproduce are available at:
https://download.01.org/0day-ci/archive/20251028/202510281407.1fbe8f8b-lkp@intel.com



-- 
0-DAY CI Kernel Test Service
https://github.com/intel/lkp-tests/wiki