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Commit 21c95eca authored by Dave Martin's avatar Dave Martin Committed by Greg Kroah-Hartman
Browse files

metag/ptrace: Reject partial NT_METAG_RPIPE writes 



commit 7195ee3120d878259e8d94a5d9f808116f34d5ea upstream.

It's not clear what behaviour is sensible when doing partial write of
NT_METAG_RPIPE, so just don't bother.

This patch assumes that userspace will never rely on a partial SETREGSET
in this case, since it's not clear what should happen anyway.

Signed-off-by: default avatarDave Martin <Dave.Martin@arm.com>
Acked-by: default avatarJames Hogan <james.hogan@imgtec.com>
Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
parent 2d6532ce

arch/metag/kernel/ptrace.c

+2 −0
Original line number Diff line number Diff line
@@ -253,6 +253,8 @@ int metag_rp_state_copyin(struct pt_regs *regs, 
	unsigned long long *ptr;

	int ret, i;



	if (count < 4*13)

		return -EINVAL;

	/* Read the entire pipeline before making any changes */

	ret = user_regset_copyin(&pos, &count, &kbuf, &ubuf,

				 &rp, 0, 4*13);