Date: Thu, 30 Dec 2004 03:29:01 +0100 From: Christian Brueffer <chris@unixpages.org> To: current@freebsd.org Subject: Fatal trap 12: page fault while in kernel mode Message-ID: <20041230022900.GF759@unixpages.org>
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--Q6STzHxy03qt/hK9 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline Content-Transfer-Encoding: quoted-printable Hi, with a kernel build from sources from Dec 30, approximately 00:30:00 UTC, I'm getting the following reproducible trap during startup: Memory modified after free 0xc1c06600(508) val=3D1ff01ff @ 0xc1c06600 Fatal trap 12: page fault while in kernel mode fault virtual address =3D 0x1ff021f fault code =3D supervisor read, page not present instruction pointer =3D 0x8:0xc0706823 stack pointer =3D 0x10:0xe53cf730 frame pointer =3D 0x10:0xe53cf750 code segment =3D base 0x0, limit 0xfffff, type 0x1b =3D DPL 0, pres 1, def32 1, gran 1 processor eflags =3D interrupts enabled, resume, IOPL =3D 0 current process =3D 61 (rcorder) [thread pid 61 tid 100051 ] Stopped at mtrash_ctor+0x63: movl 0x20(%eax),%edx db> tr Tracing pid 61 tid 100051 td 0xc1ab4170 mtrash_ctor(c1c06600,200,0,101,c07dbf04) at mtrash_ctor+0x63 uma_zalloc_arg(c10456c0,0,101,c1046be0,c07b77c6) at uma_zalloc_arg+0x484 malloc(168,c07ee200,101,b2,0) at malloc+0x84 ufsdirhash_build(c1c4b7a8,c0818348,c08386e0,0,0) at ufsdirhash_build+0x376 ufs_lookup(e53cf944,e53cfbec,e53cfc00,c057aa65,c1ab4170) at ufs_lookup+0x129 vfs_cache_lookup(e53cf9c0,20002,c1ab4170,c07aaca7,e53cfbec) at vfs_cache_lo= okup+0x278 lookup(e53cfbd8,0,c07aa52c,a7,c0838700) at lookup+0x274 namei(a53cfbd8,1,c07ab4bd,78,c079f15a) at namei+0x27d vn_open_cred(e53cfbd8,e53cfcd8,1a4,c1978d80,3) at vn_open_cred+0x192 vn_open(e53cfbd8,e53cfcd8,1a4,3,0) at vn_open+0x33 kern_open(c1ab4170,bfbfe6d3,0,1,1b6) at kern_open+0xf9 open(c1ab4170,e53cfd14,c,c1ab4170,3) at open+0x2e syscall(2f,2f,2f,bfbfe63c,4) at syscall+0x137 Xint0x80_syscall() at Xint0x80_syscall+0x1f --- syscall (5, FreeBSD ELF32, open), eip =3D 0x80573a7, esp =3D 0xbfbfe2cc= m, ebp =3D 0xbfbfe2f8 --- db> This doesn't happen with a kernel from Dec 23. - Christian --=20 Christian Brueffer chris@unixpages.org brueffer@FreeBSD.org GPG Key: http://people.freebsd.org/~brueffer/brueffer.key.asc GPG Fingerprint: A5C8 2099 19FF AACA F41B B29B 6C76 178C A0ED 982D --Q6STzHxy03qt/hK9 Content-Type: application/pgp-signature Content-Disposition: inline -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.2.6 (FreeBSD) iD8DBQFB02fsbHYXjKDtmC0RAkHsAKD+f2KBnHuXW6Zb+PwaMZ1iTKaPTQCbBt10 H4hhpRR9K86c9Eu899vvnKI= =A7t/ -----END PGP SIGNATURE----- --Q6STzHxy03qt/hK9--
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