diff options
| -rw-r--r-- | arch/um/drivers/line.c | 22 |
1 files changed, 16 insertions, 6 deletions
diff --git a/arch/um/drivers/line.c b/arch/um/drivers/line.c index 08c5fba6db84..b0022cf4efbb 100644 --- a/arch/um/drivers/line.c +++ b/arch/um/drivers/line.c @@ -572,22 +572,32 @@ int line_config(struct line *lines, unsigned int num, char *str, { struct line *line; char *new; - int n; + char *end; + int n, err; if (*str == '=') { *error_out = "Can't configure all devices from mconsole"; return -EINVAL; } - new = kstrdup(str, GFP_KERNEL); + n = simple_strtoul(str, &end, 0); + if (*end++ != '=') { + *error_out = "Couldn't parse device number"; + return -EINVAL; + } + if (n >= num) { + *error_out = "Device number out of range"; + return -EINVAL; + } + + new = kstrdup(end, GFP_KERNEL); if (new == NULL) { *error_out = "Failed to allocate memory"; return -ENOMEM; } - n = line_setup(lines, num, new, error_out); - if (n < 0) - return n; - + err = setup_one_line(lines, n, new, INIT_ONE, error_out); + if (err) + return err; line = &lines[n]; return parse_chan_pair(line->init_str, line, n, opts, error_out); } |