Date: Thu, 5 Sep 2013 12:57:33 +0300 From: Konstantin Belousov <kostikbel@gmail.com> To: Pawel Jakub Dawidek <pjd@FreeBSD.org> Cc: svn-src-head@freebsd.org, svn-src-all@freebsd.org, src-committers@freebsd.org Subject: Re: svn commit: r255219 - in head: contrib/tcpdump lib/libc lib/libc/capability lib/libc/include lib/libc/sys lib/libprocstat sbin/dhclient sbin/hastd sys/amd64/linux32 sys/bsm sys/cddl/compat/opensola... Message-ID: <20130905095733.GP41229@kib.kiev.ua> In-Reply-To: <20130905061923.GA5011@garage.freebsd.pl> References: <201309050009.r8509vsE061271@svn.freebsd.org> <20130905024448.GO41229@kib.kiev.ua> <20130905061429.GD1388@garage.freebsd.pl> <20130905061923.GA5011@garage.freebsd.pl>
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--SBikYMzjhZGK9d4p Content-Type: text/plain; charset=us-ascii Content-Disposition: inline Content-Transfer-Encoding: quoted-printable On Thu, Sep 05, 2013 at 08:19:24AM +0200, Pawel Jakub Dawidek wrote: > On Thu, Sep 05, 2013 at 08:14:29AM +0200, Pawel Jakub Dawidek wrote: > > On Thu, Sep 05, 2013 at 05:44:48AM +0300, Konstantin Belousov wrote: > > > On Thu, Sep 05, 2013 at 12:09:57AM +0000, Pawel Jakub Dawidek wrote: > > > > Author: pjd > > > > Date: Thu Sep 5 00:09:56 2013 > > > > New Revision: 255219 > > > > URL: http://svnweb.freebsd.org/changeset/base/255219 > > >=20 > > > Shortly after the boot of the updated kernel, I get: > > >=20 > > > Fatal trap 12: page fault while in kernel mode > > > cpuid =3D 7; apic id =3D 07 > > > fault virtual address =3D 0x0 > > > fault code =3D supervisor read data, page not present > > > instruction pointer =3D 0x20:0xffffffff802f685a > > > stack pointer =3D 0x28:0xfffffe0235d50460 > > > frame pointer =3D 0x28:0xfffffe0235d504b0 > > > code segment =3D base 0x0, limit 0xfffff, type 0x1b > > > =3D DPL 0, pres 1, long 1, def32 0, gran 1 > > > processor eflags =3D interrupt enabled, resume, IOPL =3D 0 > > > current process =3D 199 (ip6addrctl) > > > [ thread pid 199 tid 100086 ] > > > Stopped at 0xffffffff802f685a =3D fget+0x2a: movq (%rdx),%rax > > > db> bt > > > Tracing pid 199 tid 100086 td 0xfffff80005351980 > > > fget() at 0xffffffff802f685a =3D fget+0x2a/frame 0xfffffe0235d504b0 > > > fdesc_lookup() at 0xffffffff80e6d88d =3D fdesc_lookup+0xed/frame 0xff= fffe0235d50510 > > > VOP_LOOKUP_APV() at 0xffffffff8057b54e =3D VOP_LOOKUP_APV+0x12e/frame= 0xfffffe0235d50560 > > > lookup() at 0xffffffff803d31b0 =3D lookup+0x5a0/frame 0xfffffe0235d50= 5f0 > > > namei() at 0xffffffff803d2934 =3D namei+0x464/frame 0xfffffe0235d506c0 > > > vn_open_cred() at 0xffffffff803ee78f =3D vn_open_cred+0x27f/frame 0xf= ffffe0235d50810 > > > kern_openat() at 0xffffffff803e7bfd =3D kern_openat+0x22d/frame 0xfff= ffe0235d50980 > > > amd64_syscall() at 0xffffffff805387dd =3D amd64_syscall+0x28d/frame 0= xfffffe0235d50ab0 > > > Xfast_syscall() at 0xffffffff8051f21b =3D Xfast_syscall+0xfb/frame 0x= fffffe0235d50ab0 > > > --- syscall (5, FreeBSD ELF64, sys_open), rip =3D 0x800942d6a, rsp = =3D 0x7fffffffcff8, rbp =3D 0x7fffffffd030 --- > > >=20 > > > (gdb) list *fget+0x2a > > > 0xffffffff802f685a is in fget (/usr/home/kostik/work/build/bsd/DEV/sr= c/sys/kern/kern_descrip.c:2385). > > >=20 > > > I do not have any capsicum-related options in the kernel config. > >=20 > > Do you have some local changes? Could you try to do full buildkernel? > > There were two compilation issues when CAPABILITIES option was absent in > > kernel configuration, so something isn't right is you were able to > > compile your kernel. I have local changes, but nothing in kern_descrip.c or VFS, for this branch. The trace above is from the clean kernel build. I do able to build the kernel without CAPABILITIES. >=20 > Forgot to mention that my test machine can boot fine with kernel > compiled without the CAPABILITIES option. If taking a time and actually looking at the backtrace I posted, you would see that fdescfs is broken. The _fget() assumes that needrightsp is always non-NULL, but fget() call from fdesc_lookup() passes NULL spelled as 0. Quick look over the sys/ catched at least sys/kern/vfs_aio.c:2053 sys/cddl/compat/opensolaris/sys/file.h:57 sys/compat/linux/linux_stats.c:148 sys/dev/aacraid/aacraid_linux.c:84 with the same problem. --SBikYMzjhZGK9d4p Content-Type: application/pgp-signature -----BEGIN PGP SIGNATURE----- Version: GnuPG v2.0.21 (FreeBSD) iQIcBAEBAgAGBQJSKFWMAAoJEJDCuSvBvK1BnvIP/RDE5dTjLas2lhilQMRELkmc k/wjxi+COFVLUyVLcU90ISwNTWnEaK5krJK+vJTA2jJFwmDKbeRVrkQIrZJvk841 yzt2p4l7u1SxxzLAgl4VQ5HvHmFkR2Lb6I3yM7yy0NLZ01wXRn56W+kOHRDzAnpL AaHVdvDUisskdr80H7dYmefcfUphVgN7HLTn60U8RcsZNM9gbx2tbfYH/4zC7R43 l7sxKK04cORgiev59RZZhDoXUkyZefz0l/37ffnjbg7cgMYrG4tFTB3LPgQpWEoa +/GlEJ+2q88DZ+xyDTyjSZo10sQj+A4zEXBQ2oXj07hWA29M9zlrBDhR8TIE2HSQ rRl5jApitcGrgTXEFMTtyozB1X2qMbQwaAn7A6d0veEJHdjfW+bMEECo4NoBlf4x CVyrSWj2Z3ZScrTTgtO1tDqrTFmymZLFmyW4bQ5c/AxWWyDdGOgGIV44KEcEN0DG Hz7v6hbmKmnBSqY+JfhvXaPoY/1J7L4M0hirtNzlo7adXYYPpZOKojif45W4f6hl eS/EWSY26G8w66zN9dVmB2Sy24ucU6QhFHXEvqWK+KEpJFgTVP3R95bgEC+fMND/ +QY6j9F14Ke4TSDm4pk3MfgVK+jqqII+KKK+AmY6OioYJMUym4gYWXdnUWB9vmd5 h4tVGTUoBMKstjL9rJOl =57uS -----END PGP SIGNATURE----- --SBikYMzjhZGK9d4p--
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