vm_fault_lookup: fault on nofault entry, while loading module cc_cubic with GENERIC-KASAN
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Date: Tue, 05 Sep 2023 00:47:56 UTC
Hi, Observed unexpected kernel panic while loading modules. I have a test VM installed 13.2. I have `cc_cubic_load=YES` in /boot/loader.conf to test cc_cubic. Recently I installed custom GENERIC-DEBUG kernel (current/15) to test some features and the kernel panics during early boot. To narrow down the root cause, I tested stable/14 (d6fec2dacf80) with stock kernel config GENERIC-KASAN, it still panics. I can reliably repeat the panic with `options KASAN`. I'm not familiar with KASAN, so post here. Steps to repeat: On current/15 or stable/14 built with `options KASAN`. # kldload cc_cubic interface cubic.2 already present in the KLD 'kernel'! panic: vm_fault_lookup: fault on nofault entry, addr: 0xfffffe0061b0f000 cpuid = 1 time = 1693873182 KDB: stack backtrace: #0 0xffffffff813419b3 at kdb_backtrace+0x103 #1 0xffffffff81287ced at vpanic+0x1fd #2 0xffffffff81287ae5 at panic+0xb5 #3 0xffffffff819b1db0 at vm_fault+0x2e80 #4 0xffffffff819aedff at vm_fault_trap+0xdf #5 0xffffffff81c27c38 at trap_pfault+0x378 #6 0xffffffff81c2696b at trap+0x4db #7 0xffffffff81be4c08 at calltrap+0x8 Uptime: 23s Dumping 162 out of 951 MB:..10%..20%..30%..40%..50%..60%..70%..79%..89%..99% Dump complete Some informations that may help: loaded modules: root@:~ # kldstat Id Refs Address Size Name 1 11 0xffffffff80200000 34b4cd8 kernel 2 1 0xffffffff83e19000 7208 intpm.ko 3 1 0xffffffff83e21000 39a8 smbus.ko 4 1 0xffffffff83e25000 cd10 vmci.ko 5 1 0xffffffff83e32000 3428 mac_ntpd.ko part of dmesg: ---<<BOOT>>--- Copyright (c) 1992-2023 The FreeBSD Project. Copyright (c) 1979, 1980, 1983, 1986, 1988, 1989, 1991, 1992, 1993, 1994 The Regents of the University of California. All rights reserved. FreeBSD is a registered trademark of The FreeBSD Foundation. FreeBSD 14.0-ALPHA4 amd64 1400097 #0 stable/14-n265029-d6fec2dacf80: Mon Sep 4 16:32:22 CST 2023 zlei@:/usr/obj/home/zlei/freebsd-src-stable14/amd64.amd64/sys/GENERIC-KASAN amd64 FreeBSD clang version 16.0.6 (https://github.com/llvm/llvm-project.git llvmorg-16.0.6-0-g7cbf1a259152) VT(vga): text 80x25 CPU: Intel(R) Core(TM) i5-5257U CPU @ 2.70GHz (2700.00-MHz K8-class CPU) Origin="GenuineIntel" Id=0x306d4 Family=0x6 Model=0x3d Stepping=4 Features=0xf83fbff<FPU,VME,DE,PSE,TSC,MSR,PAE,MCE,CX8,APIC,SEP,MTRR,PGE,MCA,CMOV,PAT,PSE36,MMX,FXSR,SSE,SSE2,SS> Features2=0xfffa3203<SSE3,PCLMULQDQ,SSSE3,FMA,CX16,PCID,SSE4.1,SSE4.2,x2APIC,MOVBE,POPCNT,TSCDLT,AESNI,XSAVE,OSXSAVE,AVX,F16C,RDRAND,HV> AMD Features=0x2c100800<SYSCALL,NX,Page1GB,RDTSCP,LM> AMD Features2=0x121<LAHF,ABM,Prefetch> Structured Extended Features=0x1c27ab<FSGSBASE,TSCADJ,BMI1,AVX2,SMEP,BMI2,ERMS,INVPCID,NFPUSG,RDSEED,ADX,SMAP> Structured Extended Features3=0xbc000400<MD_CLEAR,IBPB,STIBP,L1DFL,ARCH_CAP,SSBD> XSAVE Features=0x1<XSAVEOPT> IA32_ARCH_CAPS=0xc<RSBA,SKIP_L1DFL_VME> TSC: P-state invariant Hypervisor: Origin = "VMwareVMware" real memory = 1073741824 (1024 MB) avail memory = 801873920 (764 MB) Best regards, Zhenlei