Date: Sun, 4 Apr 2010 11:56:18 +0300 From: Kostik Belousov <kostikbel@gmail.com> To: Bruce Cran <bruce@cran.org.uk> Cc: freebsd-current@freebsd.org Subject: Re: "npxdna in kernel mode!" from VIA_RNG_store Message-ID: <20100404085618.GX2415@deviant.kiev.zoral.com.ua> In-Reply-To: <201004040904.50998.bruce@cran.org.uk> References: <201004040904.50998.bruce@cran.org.uk>
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--my+VSKri2szq3kvl Content-Type: text/plain; charset=us-ascii Content-Disposition: inline Content-Transfer-Encoding: quoted-printable On Sun, Apr 04, 2010 at 09:04:50AM +0100, Bruce Cran wrote: > I noticed my mini-ITX box (runnning -CURRENT) has been printing quite a f= ew=20 > "npxdna in kernel mode!" messages recently, so I added KDB support to fin= d out=20 > where they were coming from. The stack trace I got was: >=20 > npxdna in kernel mode! > KDB: stack backtrace: > db_trace_self_wrapper(c07de67f,c8297ab8,c07a477e,c07fc759,7,...) at=20 > db_trace_self_wrapper+0x28 > kdb_backtrace(c07fc759,7,33,50,13,...) at kdb_backtrace+0x31 > trap(c8297ac4) at trap+0x55e > calltrap() at calltrap+0x6 > --- trap 0x16, eip =3D 0xc07801f0, esp =3D 0xc8297b04, ebp =3D 0xc8297b14= --- > VIA_RNG_store(c0865760,4,c181e6c0,c054ad43,c0811dc0,...) at VIA_RNG_store= +0x20 > random_nehemiah_read(c185c000,80,2,c185c000,0,...) at=20 > random_nehemiah_read+0x71 > random_read(c1476200,c8297c28,0,1000000,0,...) at random_read+0x7c > devfs_read_f(c1566c08,c8297c28,c182e080,0,c181e6c0,...) at devfs_read_f+0= xa1 > fo_read(c1566c08,c8297c28,c182e080,0,c181e6c0,...) at fo_read+0x32 > dofileread(c181e6c0,5,c1566c08,c8297c28,ffffffff,...) at dofileread+0x81 > kern_readv(c181e6c0,5,c8297c28,5,c8297c48,...) at kern_readv+0x68 > read(c181e6c0,c8297cc8,c181e6c0,c181e6c0,c187d2a8,...) at read+0x63 > syscall(c8297d38) at syscall+0x3ad > Xint0x80_syscall() at Xint0x80_syscall+0x20 > --- syscall (3, FreeBSD ELF32, read), eip =3D 0x28398b83, esp =3D 0xbfbfd= e5c, ebp=20 > =3D 0xbfbfdf18 --- >=20 > A dmesg can be found at http://www.cran.org.uk/~brucec/freebsd/dmesg.itx Known issue. The patch at http://people.freebsd.org/~kib/misc/kern_fpu.2.patch contains the possible fix. --my+VSKri2szq3kvl Content-Type: application/pgp-signature Content-Disposition: inline -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.10 (FreeBSD) iEYEARECAAYFAku4VDIACgkQC3+MBN1Mb4jsggCg7NUQ8wx2FGcJM1OJ9iL8A+hf vG0An1HP4lKpge6fcvY2L7sn0Tm9/lIi =Ta6y -----END PGP SIGNATURE----- --my+VSKri2szq3kvl--
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