lkml.org 
[lkml]   [2006]   [Jan]   [11]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
Patch in this message
/
From
SubjectSubject: Fix processing of obsolete-style setup options
Date
When kernel init code checks for presence of obsolete-style
kernel parameters it gets confused if parameters have common
prefix, such as "nousb" and "nousbstorage". Make sure that
we compare entire names, not just common prefixes.

Signed-off-by: Dmitry Torokhov <dtor@mail.ru>
---

init/main.c | 30 ++++++++++++++++--------------
1 files changed, 16 insertions(+), 14 deletions(-)

Index: work/init/main.c
===================================================================
--- work.orig/init/main.c
+++ work/init/main.c
@@ -158,24 +158,22 @@ static const char *panic_later, *panic_p

extern struct obs_kernel_param __setup_start[], __setup_end[];

-static int __init obsolete_checksetup(char *line)
+static int __init obsolete_checksetup(char *line, int len)
{
struct obs_kernel_param *p;

p = __setup_start;
do {
- int n = strlen(p->str);
- if (!strncmp(line, p->str, n)) {
+ if (!strncmp(line, p->str, len) && len == strlen(p->str)) {
if (p->early) {
- /* Already done in parse_early_param? (Needs
- * exact match on param part) */
- if (line[n] == '\0' || line[n] == '=')
- return 1;
+ /* Already done in parse_early_param? */
+ return 1;
} else if (!p->setup_func) {
- printk(KERN_WARNING "Parameter %s is obsolete,"
- " ignored\n", p->str);
+ printk(KERN_WARNING
+ "Parameter %s is obsolete, ignored\n",
+ p->str);
return 1;
- } else if (p->setup_func(line + n))
+ } else if (p->setup_func(line + len))
return 1;
}
p++;
@@ -224,21 +222,25 @@ __setup("loglevel=", loglevel);
*/
static int __init unknown_bootoption(char *param, char *val)
{
+ int len = strlen(param);
+
/* Change NUL term back to "=", to make "param" the whole string. */
if (val) {
/* param=val or param="val"? */
- if (val == param+strlen(param)+1)
+ if (val == param + len + 1) {
val[-1] = '=';
- else if (val == param+strlen(param)+2) {
+ len++;
+ } else if (val == param + len + 2) {
val[-2] = '=';
- memmove(val-1, val, strlen(val)+1);
+ memmove(val - 1, val, strlen(val) + 1);
val--;
+ len++;
} else
BUG();
}

/* Handle obsolete-style parameters */
- if (obsolete_checksetup(param))
+ if (obsolete_checksetup(param, len))
return 0;

/*
-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@vger.kernel.org
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/
\
 
 \ /
  Last update: 2006-01-11 07:48    [W:0.038 / U:1.812 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site