befs: ensure fast symlinks are NUL-terminated
Ensure fast symlink targets are NUL-terminated, even if corrupted
on-disk.
Cc: Sergey S. Kostyliov <rathamahata@php4.ru>
Signed-off-by: Duane Griffin <duaneg@dghda.com>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
diff --git a/fs/befs/linuxvfs.c b/fs/befs/linuxvfs.c
index b6dfee3..d06cb02 100644
--- a/fs/befs/linuxvfs.c
+++ b/fs/befs/linuxvfs.c
@@ -378,7 +378,8 @@
inode->i_size = 0;
inode->i_blocks = befs_sb->block_size / VFS_BLOCK_SIZE;
strncpy(befs_ino->i_data.symlink, raw_inode->data.symlink,
- BEFS_SYMLINK_LEN);
+ BEFS_SYMLINK_LEN - 1);
+ befs_ino->i_data.symlink[BEFS_SYMLINK_LEN - 1] = '\0';
} else {
int num_blks;
@@ -477,6 +478,8 @@
kfree(link);
befs_error(sb, "Failed to read entire long symlink");
link = ERR_PTR(-EIO);
+ } else {
+ link[len - 1] = '\0';
}
} else {
link = befs_ino->i_data.symlink;