Commit 7195ee31 authored by Dave Martin's avatar Dave Martin Committed by Linus Torvalds
Browse files

metag/ptrace: Reject partial NT_METAG_RPIPE writes



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>
parent 5fe81fe9
......@@ -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);
......
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