Re: [PATCH] 2.5.47: strdup()

From: Olaf Dietsche (olaf.dietsche#list.linux-kernel@t-online.de)
Date: Sat Nov 16 2002 - 10:53:00 EST


Peter Kjellerstedt <peter.kjellerstedt@axis.com> writes:

>> +char *strdup(const char *s)
>> +{
>> + char *p = kmalloc(strlen(s) + 1, GFP_KERNEL);
>> + if (p)
>> + strcpy(p, s);
>> +
>> + return p;
>> }
>> #endif
>
> You should make sure s != NULL before doing anything else.

Like strcpy(), it's the caller's responsibility to provide a valid
pointer. This shouldn't be a problem however, since access to NULL
triggers an Oops and thus is quickly detected.

Regards, Olaf.
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