Re: lighttpd crush the system after r274463

From: Guido Falsi <mad_at_madpilot.net>
Date: Fri, 19 Dec 2014 20:41:54 +0100
On 12/19/14 19:28, Adrian Chadd wrote:
> Hm, glebius? Any ideas?
> 
[...]
>> Fatal trap 12: page fault while in kernel mode
>> cpuid = 0; apic id = 00
>> fault virtual address   = 0x8
>> fault code              = supervisor read data, page not present
>> instruction pointer     = 0x20:0xffffffff809d44bd
>> stack pointer           = 0x28:0xfffffe00f77df700
>> frame pointer           = 0x28:0xfffffe00f77df730
>> 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         = 658 (lighttpd)
>> [ thread pid 658 tid 100067 ]
>> Stopped at      sbappendstream_locked+0x2d:     cmpq    $0,0x8(%r14)
>> db> bt
>> Tracing pid 658 tid 100067 td 0xfffff8000ba3e940
>> sbappendstream_locked() at sbappendstream_locked+0x2d/frame 0xfffffe00f77df730
>> sbappendstream() at sbappendstream+0x3c/frame 0xfffffe00f77df760
>> tcp_usr_send() at tcp_usr_send+0x1ab/frame 0xfffffe00f77df7e0
>> sosend_generic() at sosend_generic+0x40b/frame 0xfffffe00f77df8a0
>> soo_write() at soo_write+0x42/frame 0xfffffe00f77df8d0
>> dofilewrite() at dofilewrite+0x88/frame 0xfffffe00f77df920
>> kern_writev() at kern_writev+0x68/frame 0xfffffe00f77df970
>> sys_writev() at sys_writev+0x36/frame 0xfffffe00f77df9a0
>> amd64_syscall() at amd64_syscall+0x25a/frame 0xfffffe00f77dfab0
>> Xfast_syscall() at Xfast_syscall+0xfb/frame 0xfffffe00f77dfab0
>> --- syscall (121, FreeBSD ELF64, sys_writev), rip = 0x80164cb8a, rsp =
>> 0x7fffffffa658, rbp = 0x7fffffffe6
>> c0 ---

Maybe I'm wrong but I see some similarities with what I reported with
virtualbox.

Bug 195822 has been filed about that. All information I have is there.
Glebius already knows.

-- 
Guido Falsi <mad_at_madpilot.net>
Received on Fri Dec 19 2014 - 18:42:17 UTC

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