X-Recipient: archive-cygwin AT delorie DOT com X-SWARE-Spam-Status: No, hits=-9.6 required=5.0 tests=AWL,BAYES_00,KHOP_PGP_SIGNED,KHOP_RCVD_UNTRUST,RCVD_IN_DNSWL_HI,SPF_HELO_PASS,T_RP_MATCHES_RCVD X-Spam-Check-By: sourceware.org Message-ID: <50E1D039.7050200@redhat.com> Date: Mon, 31 Dec 2012 10:49:45 -0700 From: Eric Blake User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:17.0) Gecko/17.0 Thunderbird/17.0 MIME-Version: 1.0 To: cygwin AT cygwin DOT com Subject: dup2() dumps core on corner case OpenPGP: url=http://people.redhat.com/eblake/eblake.gpg Content-Type: multipart/signed; micalg=pgp-sha256; protocol="application/pgp-signature"; boundary="------------enig289A62D41C6A60FB5938AC5D" X-IsSubscribed: yes Mailing-List: contact cygwin-help AT cygwin DOT com; run by ezmlm List-Id: List-Subscribe: List-Archive: List-Post: List-Help: , Sender: cygwin-owner AT cygwin DOT com Mail-Followup-To: cygwin AT cygwin DOT com Delivered-To: mailing list cygwin AT cygwin DOT com --------------enig289A62D41C6A60FB5938AC5D Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: quoted-printable Detected by gnulib's unit tests. STC: $ cat foo.c #include int main() { return dup2(0, -1); } $ gcc -o foo -g -Wall foo.c $ ./foo Segmentation fault (core dumped) cygwin 1.7.17-1 Running under gdb shows: 4 [main] foo 1220 exception::handle: Exception: STATUS_ACCESS_VIOLATION 702 [main] foo 1220 open_stackdumpfile: Dumping stack trace to foo.exe.stackdump Program received signal SIGSEGV, Segmentation fault. 0x610e9407 in dup2 () from /usr/bin/cygwin1.dll Expected results should be a normal failure with EBADF in errno. --=20 Eric Blake eblake redhat com +1-919-301-3266 Libvirt virtualization library http://libvirt.org --------------enig289A62D41C6A60FB5938AC5D Content-Type: application/pgp-signature; name="signature.asc" Content-Description: OpenPGP digital signature Content-Disposition: attachment; filename="signature.asc" -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.12 (GNU/Linux) Comment: Public key at http://people.redhat.com/eblake/eblake.gpg Comment: Using GnuPG with undefined - http://www.enigmail.net/ iQEcBAEBCAAGBQJQ4dA5AAoJEKeha0olJ0Nqf9sH/0gUZcMfosCp7Jh2j4Pssriv gBfSwZNv6nGUTVKP1ZN9PoF9+hh9YlwA6MfnjV+FW6PDseLn3DRgtI/vjSfpYGn+ hF5vG2PKq/hCTKfyxG9QcTYZyYsrpN/wHfyGeJPKmtOfJLAIqeMfMUcLMWQ7ZCyM nxFBF+cq+yi4TO2+/LEcTaNMCr1YRTF8C+hvJsomc/bx+ZZctAk2RSH+2qv8AcJn 3FqiE+YLN18x8zCHHK3Lcdt6qcvOTH7oWWiLxu0GzvClfivvgR/2H4fdTDR3tjgz p7fcsqftrQAqxaYgJtqsxNQKJ0g+V4urZg+XhIpK6FEna3SxI8oAklz38dVlYAs= =jm4/ -----END PGP SIGNATURE----- --------------enig289A62D41C6A60FB5938AC5D--