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Date: Tue, 21 Nov 2017 11:14:33 +0800 From: kernel test robot <xiaolong.ye@...el.com> To: Dave Hansen <dave.hansen@...ux.intel.com> Cc: Ingo Molnar <mingo@...nel.org>, Andy Lutomirski <luto@...nel.org>, Daniel Gruss <daniel.gruss@...k.tugraz.at>, Hugh Dickins <hughd@...gle.com>, Kees Cook <keescook@...gle.com>, Linus Torvalds <torvalds@...ux-foundation.org>, Michael Schwarz <michael.schwarz@...k.tugraz.at>, Moritz Lipp <moritz.lipp@...k.tugraz.at>, Peter Zijlstra <peterz@...radead.org>, Richard Fellner <richard.fellner@...dent.tugraz.at>, Thomas Gleixner <tglx@...utronix.de>, LKML <linux-kernel@...r.kernel.org>, "H. Peter Anvin" <hpa@...or.com>, tipbuild@...or.com, lkp@...org Subject: [lkp-robot] [x86/mm/tlb] a04f08a159: WARNING:at_arch/x86/include/asm/tlbflush.h:#native_flush_tlb_global FYI, we noticed the following commit (built with gcc-5): commit: a04f08a1593be12b76cce3e5dbd5da98b77ce250 ("x86/mm/tlb: Make CR4-based TLB flushes more robust") https://git.kernel.org/cgit/linux/kernel/git/tip/tip.git WIP.x86/mm in testcase: boot on test machine: qemu-system-x86_64 -enable-kvm -m 420M caused below changes (please refer to attached dmesg/kmsg for entire log/backtrace): +---------------------------------------------------------------------+------------+------------+ | | 0fea213628 | a04f08a159 | +---------------------------------------------------------------------+------------+------------+ | boot_successes | 12 | 0 | | boot_failures | 0 | 12 | | WARNING:at_arch/x86/include/asm/tlbflush.h:#native_flush_tlb_global | 0 | 12 | | EIP:native_flush_tlb_global | 0 | 12 | +---------------------------------------------------------------------+------------+------------+ [ 0.000000] WARNING: CPU: 0 PID: 0 at arch/x86/include/asm/tlbflush.h:258 native_flush_tlb_global+0x2e/0x81 [ 0.000000] Modules linked in: [ 0.000000] CPU: 0 PID: 0 Comm: swapper Not tainted 4.14.0-01220-ga04f08a #1 [ 0.000000] task: 5572afc0 task.stack: 55722000 [ 0.000000] EIP: native_flush_tlb_global+0x2e/0x81 [ 0.000000] EFLAGS: 00210046 CPU: 0 [ 0.000000] EAX: 00000000 EBX: 00000800 ECX: 00200046 EDX: 00000000 [ 0.000000] ESI: 55834000 EDI: 55837000 EBP: 55723f24 ESP: 55723f10 [ 0.000000] DS: 007b ES: 007b FS: 0000 GS: 00e0 SS: 0068 [ 0.000000] CR0: 80050033 CR2: 00000000 CR3: 15836000 CR4: 00000000 [ 0.000000] Call Trace: [ 0.000000] ? setup_arch+0xc2/0xa34 [ 0.000000] ? vprintk_default+0x12/0x14 [ 0.000000] ? start_kernel+0x5a/0x378 [ 0.000000] ? load_idt+0x9/0xb [ 0.000000] ? i386_start_kernel+0x94/0x98 [ 0.000000] ? startup_32_smp+0x164/0x168 [ 0.000000] Code: 83 ec 14 65 a1 14 00 00 00 89 45 fc 31 c0 e9 bb 0b 99 00 eb 2d e8 ff fc ff ff 89 c1 ff 15 24 c6 73 55 a1 6c c7 73 55 a8 80 75 02 <0f> ff 89 c2 80 f2 80 0f 22 e2 0f 22 e0 89 c8 ff 15 20 c6 73 55 [ 0.000000] random: get_random_bytes called from init_oops_id+0x23/0x3b with crng_init=0 [ 0.000000] ---[ end trace 0000000000000000 ]--- To reproduce: 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, Xiaolong View attachment "config-4.14.0-01220-ga04f08a" of type "text/plain" (126204 bytes) View attachment "job-script" of type "text/plain" (4101 bytes) Download attachment "dmesg.xz" of type "application/x-xz" (10416 bytes)
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