patch-2.1.112 linux/mm/mmap.c

• Lines: 15
• Date: Sun Jul 26 13:51:42 1998
• Orig file: v2.1.111/linux/mm/mmap.c
• Orig date: Sun Jul 26 11:57:20 1998

diff -u --recursive --new-file v2.1.111/linux/mm/mmap.c linux/mm/mmap.c
@@ -196,9 +196,14 @@
 			if ((prot & PROT_WRITE) && !(file->f_mode & 2))
 				return -EACCES;
 
+			/* Make sure we don't allow writing to an append-only file.. */
+			if (IS_APPEND(file->f_dentry->d_inode) && (file->f_mode & 2))
+				return -EACCES;
+
 			/* make sure there are no mandatory locks on the file. */
 			if (locks_verify_locked(file->f_dentry->d_inode))
 				return -EAGAIN;
+
 			/* fall through */
 		case MAP_PRIVATE:
 			if (!(file->f_mode & 1))