Date: Thu, 30 Jul 2009 16:21:21 +0300 From: Kostik Belousov <kostikbel@gmail.com> To: Rene Ladan <rene@freebsd.org> Cc: freebsd-fs@freebsd.org Subject: Re: kern/136945: [ufs] [lor] filedesc structure/ufs (poll) Message-ID: <20090730132121.GH1884@deviant.kiev.zoral.com.ua> In-Reply-To: <e890cae60907300555x63de4a0dva503171d8fe2d3e6@mail.gmail.com> References: <200907271400.n6RE05Rv056472@freefall.freebsd.org> <200907290742.20838.jhb@freebsd.org> <e890cae60907290820i65abae2fracbc5ab935465089@mail.gmail.com> <200907291135.17569.jhb@freebsd.org> <e890cae60907300205v5d3d5586qe86969bd28fe8621@mail.gmail.com> <20090730092507.GF1884@deviant.kiev.zoral.com.ua> <e890cae60907300555x63de4a0dva503171d8fe2d3e6@mail.gmail.com>
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--9A1A73/U17WN0PFw Content-Type: text/plain; charset=us-ascii Content-Disposition: inline Content-Transfer-Encoding: quoted-printable On Thu, Jul 30, 2009 at 02:55:48PM +0200, Rene Ladan wrote: >=20 > FreeBSD 8.0-BETA2 #3: Thu Jul 30 13:29:46 CEST 2009 >=20 > lock order reversal: > 1st 0xffffff00510a5d80 ufs (ufs) @ /usr/src/sys/kern/kern_exec.c:570 > 2nd 0xffffff0002dfe248 filedesc structure (filedesc structure) @ /usr/sr= c/sys/kern/kern_descrip.c:1864 > KDB: stack backtrace: > db_trace_self_wrapper() at db_trace_self_wrapper+0x2a > _witness_debugger() at _witness_debugger+0x49 > witness_checkorder() at witness_checkorder+0x7ea > _sx_xlock() at _sx_xlock+0x44 > setugidsafety() at setugidsafety+0x40 > kern_execve() at kern_execve+0xf22 > execve() at execve+0x38 > syscall() at syscall+0x1af > Xfast_syscall() at Xfast_syscall+0xe1 > --- syscall (59, FreeBSD ELF64, execve), rip =3D 0x8007c3d0c, rsp =3D 0x7= fffffffec48, rbp =3D 0x7fffffffed50 --- For this one, please replace the order of lines 676 and 677 in sys/kern/kern_exec.c, that is make it be VOP_UNLOCK(imgp->vp, 0); setugidsafety(td); instead of VOP_UNLOCK(imgp->vp, 0); setugidsafety(td); --9A1A73/U17WN0PFw Content-Type: application/pgp-signature Content-Disposition: inline -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.9 (FreeBSD) iEUEARECAAYFAkpxnlEACgkQC3+MBN1Mb4iQdACfcPg7eF9peTrsew6tkY65XfFY cOYAl2sGeCOh/N1xLW+hsf1oEXkv454= =PmIC -----END PGP SIGNATURE----- --9A1A73/U17WN0PFw--
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