kern/58336: pnpbios panic: Memory modified after free 0xc4758800(2044) val=c4756800 @ 0xc47589dc

[Kris Kennaway]

The following reply was made to PR kern/58336; it has been noted by GNATS.

From: Kris Kennaway <kris at obsecurity.org>
To: darkmark <darkmark at filament.org>
Cc: FreeBSD-gnats-submit at freebsd.org
Subject: Re: kern/58336: pnpbios panic: Memory modified after free 0xc4758800(2044) val=c4756800 @ 0xc47589dc
Date: Thu, 30 Oct 2003 01:19:37 -0800

 On Tue, Oct 21, 2003 at 08:42:55AM -0700, darkmark wrote:
 
 > Memory modified after free 0xc4758800(2044) val=c4756800 @ 0xc47589dc
 > panic: Most recently used by bus-sc
 > 
 > Debugger("panic")
 > Stopped at      Debugger+0x54:  xchgl   %ebx,in_Debugger.0
 > db> where
 > Debugger(c083c6e1,c08fe300,c0853cc0,c0c21b4c,100) at Debugger+0x54
 > panic(c0853cc0,c083dd01,7fc,c4756800,c47589dc) at panic+0xd5
 > mtrash_ctor(c4758800,800,0,583,c4758800) at mtrash_ctor+0x67
 > uma_zalloc_arg(c103ae40,0,1,2c21bbc,c0891040) at uma_zalloc_arg+0x1ce
 > malloc(7ec,c0891040,1,c473dc80,c478f000) at malloc+0xd3
 > isa_add_config(c4765b00,c478d280,0,c478f000,c478f000) at isa_add_config+0x33
 > pnp_parse_resources(c478d280,c478e30e,19,0,c478e302) at pnp_parse_resources+0x3b8
 > pnpbios_identify(c08d0db4,c4765b00,c0863280,c085d008,c08caab0) at pnpbios_identify+0x43f
 > bus_generic_probe(c4765b00,c0c21d5c,c064f78e,c1cfd180,c474904c) at bus_generic_probe+0x62
 > isa_probe_children(c4765b00,c08570dd,0,c0c21d98,c0610455) at isa_probe_children+0x14
 > configure(0,c1e000,c1ec00,c1e000,0) at configure+0x4b
 > mi_startup() at mi_startup+0xb5
 > begin() at begin+0x2c
 
 Can you please obtain a core and gdb traceback as explained in 
 
   http://www.freebsd.org/doc/en_US.ISO8859-1/books/developers-handbook/kerneldebug.html
 
 Kris