FYI, we noticed the following commit (built with gcc-7): commit: 728e0fbf263e3ed359c10cb13623390564102881 ("mm/vmalloc.c: get rid of one single unlink_va() when merge") https://git.kernel.org/cgit/linux/kernel/git/next/linux-next.git master in testcase: boot 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): +-------------------------------------------------+------------+------------+ | | 1ed20f4bc2 | 728e0fbf26 | +-------------------------------------------------+------------+------------+ | boot_successes | 6 | 0 | | boot_failures | 10 | 17 | | BUG:kernel_reboot-without-warning_in_test_stage | 10 | | | kernel_BUG_at_mm/vmalloc.c | 0 | 17 | | invalid_opcode:#[##] | 0 | 17 | | RIP:__free_vmap_area | 0 | 17 | | Kernel_panic-not_syncing:Fatal_exception | 0 | 17 | +-------------------------------------------------+------------+------------+ If you fix the issue, kindly add following tag Reported-by: kernel test robot <lkp(a)intel.com&gt; [ 2.860248] kernel BUG at mm/vmalloc.c:470! [ 2.863532] invalid opcode: 0000 [#1] SMP PTI [ 2.865038] CPU: 1 PID: 1 Comm: swapper/0 Not tainted 5.2.0-rc2-00418-g728e0fbf263e3 #2 [ 2.867517] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.10.2-1 04/01/2014 [ 2.869603] RIP: 0010:__free_vmap_area+0xab/0x314 [ 2.869603] Code: 4d e0 48 39 f0 73 0f 48 39 d1 72 0a 4c 8d 75 10 48 8b 4d 10 eb 16 48 39 f0 72 0f 48 39 d1 73 0a 4c 8d 75 08 48 8b 4d 08 eb 02 <0f> 0b 48 85 c9 75 c6 48 85 ed 49 89 ef 0f 84 27 02 00 00 48 8d 4d [ 2.876280] RSP: 0000:ffffc90000327d00 EFLAGS: 00010287 [ 2.876280] RAX: ffffc900019e8000 RBX: ffff88806dbc9790 RCX: ffff88806dbc98f0 [ 2.876280] RDX: ffffc900019ed000 RSI: ffffc90001a00000 RDI: ffff88806d426d88 [ 2.876280] RBP: ffff88806dbc9a18 R08: 0000000000000001 R09: ffffffff8129d4c2 [ 2.884274] R10: ffffea0001b47880 R11: 00000000f0000080 R12: 0000000000008000 [ 2.884274] R13: ffff88806dbc9630 R14: ffff88806dbc9760 R15: 0000000000000000 [ 2.884274] FS: 0000000000000000(0000) GS:ffff88807cd00000(0000) knlGS:0000000000000000 [ 2.884274] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 2.892282] CR2: ffffc900003bc000 CR3: 000000000260a000 CR4: 00000000000406e0 [ 2.892282] Call Trace: [ 2.892282] ? kmem_cache_free+0x140/0x1f5 [ 2.892282] __purge_vmap_area_lazy+0x8f/0xdf [ 2.892282] _vm_unmap_aliases+0x110/0x13d [ 2.900279] change_page_attr_set_clr+0xc7/0x253 [ 2.900279] ? set_debug_rodata+0x11/0x11 [ 2.900279] set_memory_nx+0x35/0x38 [ 2.900279] free_init_pages+0x54/0x7f [ 2.900279] ? do_name+0x2b1/0x2b1 [ 2.900279] populate_rootfs+0xe2/0x101 [ 2.908291] do_one_initcall+0x97/0x1b4 [ 2.908291] kernel_init_freeable+0x23b/0x2d4 [ 2.908291] ? rest_init+0xc6/0xc6 [ 2.908291] kernel_init+0xa/0xff [ 2.908291] ret_from_fork+0x3a/0x50 [ 2.908291] Modules linked in: [ 2.917205] ---[ end trace 1a2925ea0cc5d2c3 ]--- To reproduce: # build kernel cd linux cp config-5.2.0-rc2-00418-g728e0fbf263e3 .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