Date: Tue, 1 Sep 2009 12:47:45 -0700 (PDT) From: Richard Mahlerwein <mahlerrd@yahoo.com> To: FreeBSD-Stable <freebsd-stable@freebsd.org> Subject: Re: Fatal Trap 12 in various processes always at address 0x3030313a Message-ID: <79047.96509.qm@web51007.mail.re2.yahoo.com> In-Reply-To: <400450.59350.qm@web51010.mail.re2.yahoo.com>
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From: Richard Mahlerwein <mahlerrd@yahoo.com> Subject: Re: Fatal Trap 12 in various processes always at address 0x3030313= a To: "FreeBSD-Stable" <freebsd-stable@freebsd.org> Date: Tuesday, September 1, 2009, 2:58 PM > From: Gavin Atkinson <gavin@FreeBSD.org> > Subject: Re: Fatal Trap 12 in various processes always at address 0x30303= 13a > To: "Richard Mahlerwein" <mahlerrd@yahoo.com> > Cc: "FreeBSD-Stable" <freebsd-stable@FreeBSD.org> > Date: Sunday, August 30, 2009, 3:47 PM > On Sat, 29 Aug 2009, Richard > Mahlerwein wrote: >=20 >> I upgraded from 7.1-PRELEASE to -stable and all seemed fine >> until I rebooted out of single user mode after doing make >> installworld and mergemaster.=A0 At that point, near the >> end of the boot sequence I got a core dump, apparently >> triggered by devd. >>=20 >> **** >> Fatal trap 12: page fault while in kernel mode. >> cpu id =3D 0; apic id =3D 00 >> fault virtual address =3D 0x3030313a >> fault code =3D supervisor write, page not present >> [snip] >> current process =3D 355 (devd) >> **** >> Does anyone have a further recommendation on what to do, >> try, test or change? >=20 > Firstly, please set up a dump partition by adding > 'dumpdev=3D"AUTO"' to your rc.conf. >=20 > Then, can you compile in the kernel debugger (options KGB / > options DDB) and when this happens again, please obtain a > backtrace from the debugger with the "bt" command.=A0 > Then, give the "show registers" command so that we can > establish which register is pointing to the odd address. > Finally, issue the "call" command to hopefully > save a copy of the kernel dump for later analysis. >=20 > Thanks, >=20 > Gavin Error at virtual address 0x3030313a current process 352(sysctl)=20 bt says (typing blind, but I think I got it): Tracing pid 352 tid 100044 td 0xc3378480 sysctl_devctl_disable(c0c80ac0,0,0,d82fcba4,d82fcba4...) at sysctl_devctl_d= isable+0xaa sysctl_root(d82fcba4,4,1,d82fcc60,0,...) at sysctl_root+0x187 userland_sysctl(c3378480,d82fcc14,3,0,0,...) at userland_sysctl+0x1c4 __sysctl(c3378480,d82fccfc,18,d82fcd38,d82fcd2c,...) at __sysctl_0x94 syscall(d82fcd38) at syscall_0x335 Xint0x80_syscall() at Xint0x80_syscall_0x20 --- syscall (202,FreeBSD ELF32, __sysctl, eip =3D 0x2815beaf, esp=3D0xbfbfe= 55c, epb =3D 0xbfbfe588 --- show registers : cs 0x20 ds 0xc1470028 es 0xc1470028 fs 0xc1460008 ss 0x28 eax 0xc0cea0cc devsoftc_0x4c ecx 0 edx 0x30303132 ebx 0xc3181350 esp 0xd82fcb34 ebp 0xd82fcb54 esi 0 edi 0 eip 0xc08218da sysctl_devctl_disable+0xaa efl 0x10202 sysctl_devctl_disable+0xaa: movl %eax,0x8(%edx) I hope that tells someone on the list way more than it tells me. Thanks again for all the help so far! -Rich I hope changing back to non-text (to get around some messed-up-ed-ness I've= been having in my Yahoo account) won't mess=0A this up too bad.=A0 Please = don't yell at me if it does - just a polite mention will do.=A0 :) I=0Achanged devd_enable=3D"NO" to devd_enable=3D"YES" in rc.conf, and get T= HIS=0Aerror (which is back to being almost the same as the original one I g= ot=0Aon the first attempt at a new kernel) vault virtual address 0x3030313a fault code =3D supervisor write, page not present instruction pointer =3D 0x20:0xc08216dc stack pointer =3D 0x28: 0xd8311b70 frame pointer =3D 0x28:0xd8300b8c code segment =3D base 0x0, limit 0xfffff, type 0x1b =3DDPL 0, pres 1, def32 1, gran 1 processor eflags =3D interrupt enabled, resume, IOPL =3D 0 current process -=3D 255 (devd) [thread pid 355 tid 100045 ] stopped at devread+0x12c: movl %eax,0x8(%edx) bt says: Tracing pid 355 tid 100045 tc 0xc3378240 devread(c30df400,d8300c60,0,c3434564,d8300bd8,...) at devread+0x12c giant_read(c30df400,d8300c60,0,0,400,...) at giant_read+0x89 devfs_read_f(c33adb48,d8300c60,c3071300,0,c33adb48,...) at=0A dofileread+0x= 96 kern_readv(c3378240,3,d8300c60,bfbfe9f7,400,...) at kern_readv+0x58 read(c3378240,d8300cfc,c,80000000,369e99,...) at read+0x4f syscall(d8300d38) at syscall_0x335 Xint0x80_syscall() at Xint0x80_syscall_0x20 --- syscall (3, FreeBSD ELF32, read), eip - 0x8086c7f, esp =3D 0xbfbfe9bc, = ebp =3D 0xbfbfee98 --- And show registers: cs=3D20,ds=3Dd8300028, es=3Dd8300028,fs=3D d8300008, ss=3D28, eax=3Dc0cea0c= c devsoftc_0x4c ecx=3D0x4,,=0Aedx=3D0x30303132, ebx=3Doxc3181350, esp=3Dpxd8300b70, ebp=3Do= xd8300b8c,=0Aesi=3D0xc30df400, edi=3D0x6, eip=3Doxc08216dc devread_0x12c, e= fl=3D0x10202 devread+0x12c: movl %eax, 0x8(%edx) I'm=0Astill not quite sure what that's telling me, but is it significant th= at=0Ait's the same virtual location with a different piece of code loaded= =0Athere because of a change in options?=A0 No other change was made, just= =0Achanging devd_enable.=A0 I'm going to check loader.conf, too, as someone= =0Aelse suggested (but at this point, I didn't want to muddy the waters by= =0Achanging two things at once). =0A=0A=0A
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