diff options
Diffstat (limited to 'arch/sparc/boot/piggyback.c')
| -rw-r--r-- | arch/sparc/boot/piggyback.c | 19 |
1 files changed, 6 insertions, 13 deletions
diff --git a/arch/sparc/boot/piggyback.c b/arch/sparc/boot/piggyback.c index bb7c95161d71..6d74064add0a 100644 --- a/arch/sparc/boot/piggyback.c +++ b/arch/sparc/boot/piggyback.c @@ -1,3 +1,4 @@ +// SPDX-License-Identifier: GPL-2.0-or-later /* Simple utility to make a single-image install kernel with initial ramdisk for Sparc tftpbooting without need to set up nfs. @@ -6,19 +7,7 @@ Pete Zaitcev <zaitcev@yahoo.com> endian fixes for cross-compiles, 2000. Copyright (C) 2011 Sam Ravnborg <sam@ravnborg.org> - 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., 675 Mass Ave, Cambridge, MA 02139, USA. */ + */ #include <dirent.h> #include <stdlib.h> @@ -165,6 +154,10 @@ static off_t get_hdrs_offset(int kernelfd, const char *filename) offset -= LOOKBACK; /* skip a.out header */ offset += AOUT_TEXT_OFFSET; + if (offset < 0) { + errno = -EINVAL; + die("Calculated a negative offset, probably elftoaout generated an invalid image. Did you use a recent elftoaout ?"); + } if (lseek(kernelfd, offset, SEEK_SET) < 0) die("lseek"); if (read(kernelfd, buffer, BUFSIZE) != BUFSIZE) |