If memchr argument is longer than strlen(kp->name), there will be some
weird result.
Signed-off-by: Dave Young <[email protected]>
---
params.c | 10 ++++++++--
1 file changed, 8 insertions(+), 2 deletions(-)
diff -upr linux/kernel/params.c linux.new/kernel/params.c
--- linux/kernel/params.c 2007-10-08 14:30:06.000000000 +0800
+++ linux.new/kernel/params.c 2007-10-08 14:31:22.000000000 +0800
@@ -592,15 +592,21 @@ static void __init param_sysfs_builtin(v
for (i=0; i < __stop___param - __start___param; i++) {
char *dot;
+ int kplen;
kp = &__start___param[i];
+ kplen = strlen(kp->name);
/* We do not handle args without periods. */
- dot = memchr(kp->name, '.', MAX_KBUILD_MODNAME);
+ if (kplen > MAX_KBUILD_MODNAME) {
+ DEBUGP("kernel parameter %s is too long\n", kp->name);
+ continue;
+ }
+ dot = memchr(kp->name, '.', kplen);
if (!dot) {
DEBUGP("couldn't find period in %s\n", kp->name);
continue;
- }
+ }
name_len = dot - kp->name;
/* new kbuild_modname? */
-
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