Date: Fri, 17 Oct 2014 11:53:58 -0400 From: John Baldwin <jhb@freebsd.org> To: freebsd-hackers@freebsd.org Cc: Navdeep Parhar <np@freebsd.org> Subject: Re: panic in ivy_rng_store() when compiled with -O0 Message-ID: <2533199.DHZybpy49d@ralph.baldwin.cx> In-Reply-To: <54384ABD.5080806@FreeBSD.org> References: <54384ABD.5080806@FreeBSD.org>
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On Friday, October 10, 2014 02:08:13 PM Navdeep Parhar wrote: > I built my kernel + modules (head as of today) with -O0 and now it > panics during boot. I did bump up KSTACK_PAGES significantly so that's > not the problem. I'm going to take out the RNG device next and see if I > can get past this. > > Regards, > Navdeep > > Fatal trap 9: general protection fault while in kernel mode > cpuid = 0; apic id = 00 > instruction pointer = 0x20:0xffffffff814ac661 > stack pointer = 0x28:0xfffffe01ed6c6930 > frame pointer = 0x28:0xfffffe01ed6c6960 > code segment = base 0x0, limit 0xfffff, type 0x1b > = DPL 0, pres 1, long 1, def32 0, gran 1 > processor eflags = interrupt enabled, resume, IOPL = 0 > current process = 14 (rand_harvestq) > [ thread pid 14 tid 100017 ] > Stopped at ivy_rng_store+0x31: movq %rdi,(%rdi) > db> bt > Tracing pid 14 tid 100017 td 0xfffff800042c84c0 > ivy_rng_store() at ivy_rng_store+0x31/frame 0xfffffe01ed6c6960 > random_ivy_read() at random_ivy_read+0x78/frame 0xfffffe01ed6c6990 > live_entropy_sources_feed() at live_entropy_sources_feed+0x73/frame > 0xfffffe01ed6c69d0 > random_kthread() at random_kthread+0x224/frame 0xfffffe01ed6c6a30 > fork_exit() at fork_exit+0x14a/frame 0xfffffe01ed6c6ab0 > fork_trampoline() at fork_trampoline+0xe/frame 0xfffffe01ed6c6ab0 > --- trap 0, rip = 0, rsp = 0xfffffe01ed6c6b70, rbp = 0 --- Can you 'p $rdi'? -- John Baldwin
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