> Um, what about delivering a SIGSEGV? So, copy_to/from_user always
> returns 0, but a signal is delivered. Then the only places which need
> to be clever are the mount option copying, and the signal delivery
> code for SIGSEGV (which uses copy_to_user).
Sorry, this doesn't work here either: this would return the wrong
value from read.
Of course, everyone who does more than one copy_to_user should be
checking that return value, and not doing:
if (copy_to_user(uptr....)
|| copy_to_user(uptr+10,....)
return -EFAULT
So that such gc schemes actually work,
Rusty.
-- Anyone who quotes me in their sig is an idiot. -- Rusty Russell. - 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/
This archive was generated by hypermail 2b29 : Thu May 23 2002 - 22:00:16 EST