patch-2.4.1 linux/fs/exec.c

• Lines: 43
• Date: Mon Jan 29 23:10:58 2001
• Orig file: v2.4.0/linux/fs/exec.c
• Orig date: Wed Jan 3 20:45:26 2001

diff -u --recursive --new-file v2.4.0/linux/fs/exec.c linux/fs/exec.c
@@ -388,10 +388,8 @@
 
 	old_mm = current->mm;
 	if (old_mm && atomic_read(&old_mm->mm_users) == 1) {
-		flush_cache_mm(old_mm);
 		mm_release();
 		exit_mmap(old_mm);
-		flush_tlb_mm(old_mm);
 		return 0;
 	}
 
@@ -407,6 +405,7 @@
 		/* Add it to the list of mm's */
 		spin_lock(&mmlist_lock);
 		list_add(&mm->mmlist, &init_mm.mmlist);
+		mmlist_nr++;
 		spin_unlock(&mmlist_lock);
 
 		task_lock(current);
@@ -938,18 +937,22 @@
 #else
 	corename[4] = '\0';
 #endif
-	file = filp_open(corename, O_CREAT | 2 | O_TRUNC | O_NOFOLLOW, 0600);
+	file = filp_open(corename, O_CREAT | 2 | O_NOFOLLOW, 0600);
 	if (IS_ERR(file))
 		goto fail;
 	inode = file->f_dentry->d_inode;
 	if (inode->i_nlink > 1)
 		goto close_fail;	/* multiple links - don't dump */
+	if (d_unhashed(file->f_dentry))
+		goto close_fail;
 
 	if (!S_ISREG(inode->i_mode))
 		goto close_fail;
 	if (!file->f_op)
 		goto close_fail;
 	if (!file->f_op->write)
+		goto close_fail;
+	if (do_truncate(file->f_dentry, 0) != 0)
 		goto close_fail;
 	if (!binfmt->core_dump(signr, regs, file))
 		goto close_fail;