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A fix from Larry for a corner case where insmod could end up

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doing an xrealloc(0).
This commit is contained in:
Eric Andersen 2001-04-26 19:29:58 +00:00
parent 6aabfd5e30
commit 7f3b86e7bf
2 changed files with 16 additions and 6 deletions
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11
insmod.c
View File

@ -124,7 +124,7 @@
#ifndef MODUTILS_MODULE_H
static const int MODUTILS_MODULE_H = 1;
#ident "$Id: insmod.c,v 1.59 2001/04/25 17:22:32 andersen Exp $"
#ident "$Id: insmod.c,v 1.60 2001/04/26 19:29:58 andersen Exp $"
/* This file contains the structures used by the 2.0 and 2.1 kernels.
We do not use the kernel headers directly because we do not wish
@ -330,7 +330,7 @@ int delete_module(const char *);
#ifndef MODUTILS_OBJ_H
static const int MODUTILS_OBJ_H = 1;
#ident "$Id: insmod.c,v 1.59 2001/04/25 17:22:32 andersen Exp $"
#ident "$Id: insmod.c,v 1.60 2001/04/26 19:29:58 andersen Exp $"
/* The relocatable object is manipulated using elfin types. */
@ -1536,7 +1536,9 @@ struct obj_section *obj_create_alloced_section_first(struct obj_file *f,
void *obj_extend_section(struct obj_section *sec, unsigned long more)
{
unsigned long oldsize = sec->header.sh_size;
sec->contents = xrealloc(sec->contents, sec->header.sh_size += more);
if (more) {
sec->contents = xrealloc(sec->contents, sec->header.sh_size += more);
}
return sec->contents + oldsize;
}
@ -2474,6 +2476,9 @@ new_init_module(const char *m_name, struct obj_file *f,
tgt_long m_addr;
sec = obj_find_section(f, ".this");
if (!sec || !sec->contents) {
perror_msg_and_die("corrupt module %s?",m_name);
}
module = (struct new_module *) sec->contents;
m_addr = sec->header.sh_addr;

11
modutils/insmod.c
View File

@ -124,7 +124,7 @@
#ifndef MODUTILS_MODULE_H
static const int MODUTILS_MODULE_H = 1;
#ident "$Id: insmod.c,v 1.59 2001/04/25 17:22:32 andersen Exp $"
#ident "$Id: insmod.c,v 1.60 2001/04/26 19:29:58 andersen Exp $"
/* This file contains the structures used by the 2.0 and 2.1 kernels.
We do not use the kernel headers directly because we do not wish
@ -330,7 +330,7 @@ int delete_module(const char *);
#ifndef MODUTILS_OBJ_H
static const int MODUTILS_OBJ_H = 1;
#ident "$Id: insmod.c,v 1.59 2001/04/25 17:22:32 andersen Exp $"
#ident "$Id: insmod.c,v 1.60 2001/04/26 19:29:58 andersen Exp $"
/* The relocatable object is manipulated using elfin types. */
@ -1536,7 +1536,9 @@ struct obj_section *obj_create_alloced_section_first(struct obj_file *f,
void *obj_extend_section(struct obj_section *sec, unsigned long more)
{
unsigned long oldsize = sec->header.sh_size;
sec->contents = xrealloc(sec->contents, sec->header.sh_size += more);
if (more) {
sec->contents = xrealloc(sec->contents, sec->header.sh_size += more);
}
return sec->contents + oldsize;
}
@ -2474,6 +2476,9 @@ new_init_module(const char *m_name, struct obj_file *f,
tgt_long m_addr;
sec = obj_find_section(f, ".this");
if (!sec || !sec->contents) {
perror_msg_and_die("corrupt module %s?",m_name);
}
module = (struct new_module *) sec->contents;
m_addr = sec->header.sh_addr;