diff options
Diffstat (limited to 'init/do_mounts.c')
| -rw-r--r-- | init/do_mounts.c | 27 |
1 files changed, 16 insertions, 11 deletions
diff --git a/init/do_mounts.c b/init/do_mounts.c index 2ed30ff6c906..9207bde9ca3f 100644 --- a/init/do_mounts.c +++ b/init/do_mounts.c @@ -338,20 +338,19 @@ __setup("rootflags=", root_data_setup); __setup("rootfstype=", fs_names_setup); __setup("rootdelay=", root_delay_setup); -static int __init split_fs_names(char *page, char *names) +/* This can return zero length strings. Caller should check */ +static int __init split_fs_names(char *page, size_t size, char *names) { - int count = 0; + int count = 1; char *p = page; - strcpy(p, root_fs_names); + strlcpy(p, root_fs_names, size); while (*p++) { - if (p[-1] == ',') + if (p[-1] == ',') { p[-1] = '\0'; + count++; + } } - *p = '\0'; - - for (p = page; *p; p += strlen(p)+1) - count++; return count; } @@ -404,12 +403,16 @@ void __init mount_block_root(char *name, int flags) scnprintf(b, BDEVNAME_SIZE, "unknown-block(%u,%u)", MAJOR(ROOT_DEV), MINOR(ROOT_DEV)); if (root_fs_names) - num_fs = split_fs_names(fs_names, root_fs_names); + num_fs = split_fs_names(fs_names, PAGE_SIZE, root_fs_names); else num_fs = list_bdev_fs_names(fs_names, PAGE_SIZE); retry: for (i = 0, p = fs_names; i < num_fs; i++, p += strlen(p)+1) { - int err = do_mount_root(name, p, flags, root_mount_data); + int err; + + if (!*p) + continue; + err = do_mount_root(name, p, flags, root_mount_data); switch (err) { case 0: goto out; @@ -543,10 +546,12 @@ static int __init mount_nodev_root(void) fs_names = (void *)__get_free_page(GFP_KERNEL); if (!fs_names) return -EINVAL; - num_fs = split_fs_names(fs_names, root_fs_names); + num_fs = split_fs_names(fs_names, PAGE_SIZE, root_fs_names); for (i = 0, fstype = fs_names; i < num_fs; i++, fstype += strlen(fstype) + 1) { + if (!*fstype) + continue; if (!fs_is_nodev(fstype)) continue; err = do_mount_root(root_device_name, fstype, root_mountflags, |