Date: Mon, 11 Aug 2003 15:09:32 -0700 From: Kris Kennaway <kris@obsecurity.org> To: Kris Kennaway <kris@obsecurity.org> Cc: phk@FreeBSD.org Subject: Re: LOR with filedesc structure and Giant Message-ID: <20030811220932.GA43465@rot13.obsecurity.org> In-Reply-To: <20030809061112.GA4044@rot13.obsecurity.org> References: <20030809061112.GA4044@rot13.obsecurity.org>
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--azLHFNyN32YCQGCU Content-Type: text/plain; charset=us-ascii Content-Disposition: inline Content-Transfer-Encoding: quoted-printable On Fri, Aug 08, 2003 at 11:11:12PM -0700, Kris Kennaway wrote: > Aug 9 11:29:50 dosirak kernel: lock order reversal > Aug 9 11:29:50 dosirak kernel: 1st 0xcf3fa334 filedesc structure (filede= sc structure) @ kern/sys_generic.c:895 > Aug 9 11:29:50 dosirak kernel: 2nd 0xc070a8e0 Giant (Giant) @ fs/specfs/= spec_vnops.c:372 > Aug 9 11:29:50 dosirak kernel: Stack backtrace: >=20 > And that's it (i.e. no backtrace is recorded). I got this on another machine: lock order reversal 1st 0xc3d25134 filedesc structure (filedesc structure) @ /a/asami/portbuil= d/i386/src-client/sys/kern/sys_generic.c:902 2nd 0xc04aa500 Giant (Giant) @ /a/asami/portbuild/i386/src-client/sys/fs/s= pecfs/spec_vnops.c:372 Stack backtrace: backtrace(c043db3b,c04aa500,c043a130,c043a130,c04354a7) at backtrace+0x17 witness_lock(c04aa500,8,c04354a7,174,1be) at witness_lock+0x672 _mtx_lock_flags(c04aa500,0,c04354a7,174,c043e146) at _mtx_lock_flags+0xba spec_poll(ce655af8,ce655b18,c02d152c,ce655af8,c0493d80) at spec_poll+0x134 spec_vnoperate(ce655af8,c0493d80,c35485b4,40,c42f6800) at spec_vnoperate+0x= 18 vn_poll(c26abe58,40,c42f6800,c3087720,c42f6800) at vn_poll+0x3c selscan(c3087720,ce655b98,ce655b88,6,4) at selscan+0x13e kern_select(c3087720,6,bfbff5b0,0,0) at kern_select+0x36f select(c3087720,ce655d10,c0455f34,3ee,5) at select+0x66 syscall(2f,2f,2f,8055050,bfbff5a8) at syscall+0x273 Xint0x80_syscall() at Xint0x80_syscall+0x1d Kris --azLHFNyN32YCQGCU Content-Type: application/pgp-signature Content-Disposition: inline -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.2.2 (FreeBSD) iD8DBQE/OBQcWry0BWjoQKURAsWjAKDM1XNWer5gsASrxxFOmfdWJcT+5gCgkPbx QycTQqt4tx9JVVpmVs8hG0k= =pWMi -----END PGP SIGNATURE----- --azLHFNyN32YCQGCU--
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