FYI, we noticed the following commit (built with gcc-7): commit: bb9cd077e216b886438c5698e1cd75f762ecd3c9 ("xfrm: remove unneeded export_symbols") https://git.kernel.org/cgit/linux/kernel/git/next/linux-next.git master in testcase: trinity with following parameters: runtime: 300s test-description: Trinity is a linux system call fuzz tester. test-url: http://codemonkey.org.uk/projects/trinity/ on test machine: qemu-system-x86_64 -enable-kvm -cpu SandyBridge -smp 2 -m 2G caused below changes (please refer to attached dmesg/kmsg for entire log/backtrace): +--------------------------------------------------+------------+------------+ | | c53ac41e37 | bb9cd077e2 | +--------------------------------------------------+------------+------------+ | boot_successes | 15 | 0 | | boot_failures | 5 | 22 | | BUG:kernel_hang_in_boot_stage | 3 | | | IP-Config:Auto-configuration_of_network_failed | 1 | | | WARNING:at_net/sched/sch_generic.c:#dev_watchdog | 1 | | | RIP:dev_watchdog | 1 | | | BUG:kernel_reboot-without-warning_in_boot_stage | 0 | 22 | +--------------------------------------------------+------------+------------+ If you fix the issue, kindly add following tag Reported-by: kernel test robot <lkp(a)intel.com&gt; [ 0.043126] RAMDISK: [mem 0x7b8d4000-0x7ffcffff] [ 0.044017] ACPI: Early table checksum verification disabled [ 0.045128] ACPI: RSDP 0x00000000000F6840 000014 (v00 BOCHS ) [ 0.046233] ACPI: RSDT 0x000000007FFE15C9 000030 (v01 BOCHS BXPCRSDT 00000001 BXPC 00000001) [ 0.047603] ACPI: FACP 0x000000007FFE149D 000074 (v01 BOCHS BXPCFACP 00000001 BXPC 00000001) BUG: kernel reboot-without-warning in boot stage Elapsed time: 10 qemu-img create -f qcow2 disk-vm-snb-2G-160-0 256G qemu-img create -f qcow2 disk-vm-snb-2G-160-1 256G To reproduce: # build kernel cd linux cp config-5.0.0-11713-gbb9cd07 .config make HOSTCC=gcc-7 CC=gcc-7 ARCH=x86_64 olddefconfig make HOSTCC=gcc-7 CC=gcc-7 ARCH=x86_64 prepare make HOSTCC=gcc-7 CC=gcc-7 ARCH=x86_64 modules_prepare make HOSTCC=gcc-7 CC=gcc-7 ARCH=x86_64 SHELL=/bin/bash make HOSTCC=gcc-7 CC=gcc-7 ARCH=x86_64 bzImage git clone https://github.com/intel/lkp-tests.git cd lkp-tests bin/lkp qemu -k <bzImage> job-script # job-script is attached in this email Thanks, lkp