07edff9265
KDGKBSENT (the getter) needs only 'user_kdgkb->kb_func' from the userspace, i.e. the index. Then it needs a buffer for a local copy of 'kb_string'. KDSKBSENT (the setter) needs a copy up to the length of 'user_kdgkb->kb_string'. That means, we obtain the index before the switch-case and use it in both paths and: 1) allocate full space in the getter case, and 2) copy the string only in the setter case. We do it by strndup_user helper now which was not available when this function was written. Given we copy the two members of 'struct kbsentry' separately, we no longer need a local definition. Hence we need to change all the sizeofs here too. Signed-off-by: Jiri Slaby <jslaby@suse.cz> Link: https://lore.kernel.org/r/20201029113222.32640-11-jslaby@suse.cz Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> |
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| Kconfig | ||
| Makefile | ||