Date: Fri, 10 May 2019 08:07:46 +0200 (CEST) From: =?UTF-8?Q?Trond_Endrest=C3=B8l?= <trond.endrestol@ximalas.info> To: freebsd-current@freebsd.org Subject: Re: Panic in fbt_provide_module_function() on head amd64 r347403 Message-ID: <alpine.BSF.2.21.9999.1905100800540.6389@enterprise.ximalas.info> In-Reply-To: <3040f1dad5052ef2074a8370bc0af078@lerctr.org> References: <alpine.BSF.2.21.9999.1905092328550.6389@enterprise.ximalas.info> <3040f1dad5052ef2074a8370bc0af078@lerctr.org>
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On Thu, 9 May 2019 17:23-0500, Larry Rosenman wrote: > On 05/09/2019 5:19 pm, Trond Endrestøl wrote: > > Host is Windows 7 x64 SP1. > > CPU is Core i7 960. > > Hypervisor is VirtualBox 6.0.6. > > VM is using UEFI. > > Kernel config is > > https://ximalas.info/~trond/create-zfs/canmount/VBOXGUEST-amd64-head > > > > Crash happens early during boot, right after launching the APs. > > > > fault virtual address = 0x0 > > [...] > > KDB backtrace: > > db_trace_self_wrapper() at > > vpanic() at > > panic() at > > trap_fatal() at > > trap_pfault() at > > trap() at > > calltrap() at > > -- trap 0xc, rip = 0xffffffff8196d63a, rsp = 0xffffffff8198d730, rbp = > > 0xffffffff8198d790 --- > > fbt_provide_module_function() at 0xffffffff8196d63a = > > fbt_provide_module_function+0x7a/frame 0xffffffff8198d790 > > link_elf_each_function_nameval() at 0xffffffff80822ae5 = > > link_elf_each_function_nameval+0x115/frame 0xffffffff8198d7e0 > > fbt_provide_module() at 0xffffffff8196c33e = > > fbt_provide_module+0xde/frame 0xffffffff8198dc10 > > fbt_linker_file_cb() at 0xffffffff8196c242 = > > fbt_linker_file_cb+0x12/frame 0xffffffff8198dc20 > > linker_file_foreach() at 0xffffffff807c47b7 = > > linker_file_foreach+0x67/frame 0xffffffff8198dc60 > > mi_startup() at 0xffffffff80786de6 = mi_startup+0x216/frame > > 0xffffffff8198dcb0 > > btext() at 0xffffffff8030da2c = btext+0x2c > > Uptime: 1s > > > > Previous BE is r346969 and works flawlessly. > > No dumpdev is enabled to capture the details this early during boot. > > Suggestions are welcome. > > There is a patch: > From: markj@FreeBSD.org (on my Crash loading dtraceall thread): > > > I see, my theory above is not the real problem here. The resolver for > x86_rng_store() may return NULL, which we do not expect. Can you show > the CPU info and features lines from the dmesg to confirm? CPU: Intel(R) Core(TM) i7 CPU 960 @ 3.20GHz (3207.36-MHz K8-class CPU) Origin="GenuineIntel" Id=0x196a5 Family=0x6 Model=0x1a Stepping=5 Features=0x1783fbff<FPU,VME,DE,PSE,TSC,MSR,PAE,MCE,CX8,APIC,SEP,MTRR,PGE,MCA,CMOV,PAT,PSE36,MMX,FXSR,SSE,SSE2,HTT> Features=0x180201<SSE3,SSSE3,SSE4.1,SSE4.2> AMD Features=0x28100800<SYSCALL,NX,RDTSCP,LM> AMD Features2=0x1<LAHF> TSC: P-state invariant I'll try the patch below when I get home. Thanks. > Also see if this patch helps: > > diff --git a/sys/dev/random/ivy.c b/sys/dev/random/ivy.c > index 57f3d0a1d80b..71065d788cf9 100644 > --- a/sys/dev/random/ivy.c > +++ b/sys/dev/random/ivy.c > @@ -97,6 +97,13 @@ x86_rdseed_store(u_long *buf) > return (retry); > } > > +static int > +x86_dead_store(u_long *buf __unused) > +{ > + > + panic("missing hardware PRNG support"); > +} > + > DEFINE_IFUNC(static, int, x86_rng_store, (u_long *buf), static) > { > has_rdrand = (cpu_feature2 & CPUID2_RDRAND); > @@ -107,7 +114,7 @@ DEFINE_IFUNC(static, int, x86_rng_store, (u_long *buf), > static) > else if (has_rdrand) > return (x86_rdrand_store); > else > - return (NULL); > + return (x86_dead_store); > } > > /* It is required that buf length is a multiple of sizeof(u_long). */ -- Trond. 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