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Date: Wed, 8 Jun 2005 04:52:08 +0400
From: Andrey Chernov <ache@nagual.pp.ru>
To: current@freebsd.org
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Subject: Still something wrong with tcp_sack_option ()
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With very recent kernel I have a panic once per several hours, always in 
swi1:net, always something called from tcp_sack_option (), see 
example below:

Fatal trap 12: page fault while in kernel mode
fault virtual address   = 0x4
fault code              = supervisor read, page not present
instruction pointer     = 0x20:0xc0539f12
stack pointer           = 0x28:0xcc7e4a8c
frame pointer           = 0x28:0xcc7e4adc
code segment            = base 0x0, limit 0xfffff, type 0x1b
                        = DPL 0, pres 1, def32 1, gran 1
processor eflags        = interrupt enabled, resume, IOPL = 0
current process         = 29 (swi1: net)
trap number             = 12
panic: page fault

#5  0xc05ccea0 in trap ()
#6  0xc05bdf0a in calltrap ()
#7  0xcc7e0008 in ?? ()
#8  0x00000028 in ?? ()
#9  0x00000028 in ?? ()
#10 0x00000000 in ?? ()
#11 0xc1a9e1cc in ?? ()
#12 0xcc7e4adc in ?? ()
#13 0xcc7e4a78 in ?? ()
#14 0xcc7e4ab0 in ?? ()
#15 0xc1129000 in ?? ()
#16 0x7e56b4a9 in ?? ()
#17 0xcc7e4ab0 in ?? ()
#18 0x0000000c in ?? ()
#19 0x00000000 in ?? ()
#20 0xc0539f12 in tcp_sack_option ()


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