patch-2.2.0-pre2 linux/arch/i386/kernel/ptrace.c

• Lines: 20
• Date: Tue Dec 29 15:59:32 1998
• Orig file: v2.2.0-pre1/linux/arch/i386/kernel/ptrace.c
• Orig date: Fri Nov 27 13:09:22 1998

diff -u --recursive --new-file v2.2.0-pre1/linux/arch/i386/kernel/ptrace.c linux/arch/i386/kernel/ptrace.c
@@ -420,7 +420,9 @@
 		case PTRACE_PEEKDATA: {
 			unsigned long tmp;
 
+			down(&child->mm->mmap_sem);
 			ret = read_long(child, addr, &tmp);
+			up(&child->mm->mmap_sem);
 			if (ret >= 0)
 				ret = put_user(tmp,(unsigned long *) data);
 			goto out;
@@ -451,7 +453,9 @@
       /* when I and D space are separate, this will have to be fixed. */
 		case PTRACE_POKETEXT: /* write the word at location addr. */
 		case PTRACE_POKEDATA:
+			down(&child->mm->mmap_sem);
 			ret = write_long(child,addr,data);
+			up(&child->mm->mmap_sem);
 			goto out;
 
 		case PTRACE_POKEUSR: /* write the word at location addr in the USER area */