From: Eric Andersen <andersen@codepoet.org>
Date: Thu, 28 Jun 2001 21:36:06 +0000 (-0000)
Subject: Fix a nasty hard to spot bug found by Ralph Siemsen <ralphs@netwinder.org>.
X-Git-Tag: 0_52~45
X-Git-Url: https://git.librecmc.org/?a=commitdiff_plain;h=66ca9480c8878285af3c1fceb526d592d1390579;p=oweals%2Fbusybox.git

Fix a nasty hard to spot bug found by Ralph Siemsen <ralphs@netwinder.org>.
This would cause it to obliterates the end of the strtab section, so
symbol lookups would fail and then it would crash.  Ugh.  This should
fix things for people having trouble with insmod.
---

diff --git a/insmod.c b/insmod.c
index 71f76c750..4b0051594 100644
--- a/insmod.c
+++ b/insmod.c
@@ -130,7 +130,7 @@
 #ifndef MODUTILS_MODULE_H
 static const int MODUTILS_MODULE_H = 1;
 
-#ident "$Id: insmod.c,v 1.66 2001/06/19 15:00:52 andersen Exp $"
+#ident "$Id: insmod.c,v 1.67 2001/06/28 21:36:06 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
@@ -347,7 +347,7 @@ int delete_module(const char *);
 #ifndef MODUTILS_OBJ_H
 static const int MODUTILS_OBJ_H = 1;
 
-#ident "$Id: insmod.c,v 1.66 2001/06/19 15:00:52 andersen Exp $"
+#ident "$Id: insmod.c,v 1.67 2001/06/28 21:36:06 andersen Exp $"
 
 /* The relocatable object is manipulated using elfin types.  */
 
@@ -1460,8 +1460,13 @@ struct obj_symbol *obj_add_symbol(struct obj_file *f, const char *name,
 	f->symtab[hash] = sym;
 	sym->ksymidx = -1;
 
-	if (ELFW(ST_BIND) (info) == STB_LOCAL)
-		f->local_symtab[symidx] = sym;
+	if (ELFW(ST_BIND)(info) == STB_LOCAL && symidx != -1) {
+		if (symidx >= f->local_symtab_size)
+			error_msg("local symbol %s with index %ld exceeds local_symtab_size %ld",
+					name, (long) symidx, (long) f->local_symtab_size);
+		else
+			f->local_symtab[symidx] = sym;
+	}
 
   found:
 	sym->name = name;
diff --git a/modutils/insmod.c b/modutils/insmod.c
index 71f76c750..4b0051594 100644
--- a/modutils/insmod.c
+++ b/modutils/insmod.c
@@ -130,7 +130,7 @@
 #ifndef MODUTILS_MODULE_H
 static const int MODUTILS_MODULE_H = 1;
 
-#ident "$Id: insmod.c,v 1.66 2001/06/19 15:00:52 andersen Exp $"
+#ident "$Id: insmod.c,v 1.67 2001/06/28 21:36:06 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
@@ -347,7 +347,7 @@ int delete_module(const char *);
 #ifndef MODUTILS_OBJ_H
 static const int MODUTILS_OBJ_H = 1;
 
-#ident "$Id: insmod.c,v 1.66 2001/06/19 15:00:52 andersen Exp $"
+#ident "$Id: insmod.c,v 1.67 2001/06/28 21:36:06 andersen Exp $"
 
 /* The relocatable object is manipulated using elfin types.  */
 
@@ -1460,8 +1460,13 @@ struct obj_symbol *obj_add_symbol(struct obj_file *f, const char *name,
 	f->symtab[hash] = sym;
 	sym->ksymidx = -1;
 
-	if (ELFW(ST_BIND) (info) == STB_LOCAL)
-		f->local_symtab[symidx] = sym;
+	if (ELFW(ST_BIND)(info) == STB_LOCAL && symidx != -1) {
+		if (symidx >= f->local_symtab_size)
+			error_msg("local symbol %s with index %ld exceeds local_symtab_size %ld",
+					name, (long) symidx, (long) f->local_symtab_size);
+		else
+			f->local_symtab[symidx] = sym;
+	}
 
   found:
 	sym->name = name;