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authorEric Andersen <andersen@codepoet.org>2002-06-06 14:24:57 +0000
committerEric Andersen <andersen@codepoet.org>2002-06-06 14:24:57 +0000
commit6fb4e4877a9d447c45b4f511e9851f2f8f7443b3 (patch)
tree83c7886aa0521108d5b82d5b91422f2f34e7c29b /modutils/insmod.c
parent0d2d1eb59983097f95acc4da874e8f5a78c8b1de (diff)
downloadbusybox-6fb4e4877a9d447c45b4f511e9851f2f8f7443b3.tar.gz
Fix buffer overflows noted by Gerardo Puga
-Erik
Diffstat (limited to 'modutils/insmod.c')
-rw-r--r--modutils/insmod.c34
1 files changed, 20 insertions, 14 deletions
diff --git a/modutils/insmod.c b/modutils/insmod.c
index cab2cc204..c89cd3c8d 100644
--- a/modutils/insmod.c
+++ b/modutils/insmod.c
@@ -233,7 +233,7 @@
#ifndef MODUTILS_MODULE_H
static const int MODUTILS_MODULE_H = 1;
-#ident "$Id: insmod.c,v 1.83 2002/05/24 06:50:15 andersen Exp $"
+#ident "$Id: insmod.c,v 1.84 2002/06/06 14:24:57 andersen Exp $"
/* This file contains the structures used by the 2.0 and 2.1 kernels.
We do not use the kernel headers directly because we do not wish
@@ -454,7 +454,7 @@ int delete_module(const char *);
#ifndef MODUTILS_OBJ_H
static const int MODUTILS_OBJ_H = 1;
-#ident "$Id: insmod.c,v 1.83 2002/05/24 06:50:15 andersen Exp $"
+#ident "$Id: insmod.c,v 1.84 2002/06/06 14:24:57 andersen Exp $"
/* The relocatable object is manipulated using elfin types. */
@@ -3426,7 +3426,7 @@ extern int insmod_main( int argc, char **argv)
int k_crcs;
int k_new_syscalls;
int len;
- char *tmp;
+ char *tmp, *tmp1;
unsigned long m_size;
ElfW(Addr) m_addr;
FILE *fp;
@@ -3464,7 +3464,7 @@ extern int insmod_main( int argc, char **argv)
flag_export = 0;
break;
case 'o': /* name the output module */
- strncpy(m_name, optarg, FILENAME_MAX);
+ safe_strncpy(m_name, optarg, sizeof(m_name));
break;
case 'L': /* Stub warning */
/* This is needed for compatibility with modprobe.
@@ -3482,20 +3482,26 @@ extern int insmod_main( int argc, char **argv)
}
/* Grab the module name */
- if ((tmp = strrchr(argv[optind], '/')) != NULL) {
- tmp++;
- } else {
- tmp = argv[optind];
- }
+ tmp1 = xstrdup(argv[optind]);
+ tmp = basename(tmp1);
len = strlen(tmp);
- if (len > 2 && tmp[len - 2] == '.' && tmp[len - 1] == 'o')
- len -= 2;
- memcpy(m_fullName, tmp, len);
- m_fullName[len]='\0';
+ if (len > 2 && tmp[len - 2] == '.' && tmp[len - 1] == 'o') {
+ len-=2;
+ tmp[len] = '\0';
+ }
+ if (len >= sizeof(m_fullName)) {
+ len = sizeof(m_fullName);
+ }
+ safe_strncpy(m_fullName, tmp, len);
+ if (tmp1)
+ free(tmp1);
if (*m_name == '\0') {
- strcpy(m_name, m_fullName);
+ safe_strncpy(m_name, m_fullName, sizeof(m_name));
}
+ len = strlen(m_fullName);
+ if (len > (sizeof(m_fullName)-3))
+ error_msg_and_die("%s: no module by that name found", m_fullName);
strcat(m_fullName, ".o");
/* Get a filedesc for the module. Check we we have a complete path */