From: Dave Martin Dave.Martin@arm.com
This patch has been added to the stable tree. If you have any objections, please let us know.
===============
[ Upstream commit 7195ee3120d878259e8d94a5d9f808116f34d5ea ]
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: Dave Martin Dave.Martin@arm.com Acked-by: James Hogan james.hogan@imgtec.com Signed-off-by: Linus Torvalds torvalds@linux-foundation.org Signed-off-by: Sasha Levin alexander.levin@microsoft.com --- arch/metag/kernel/ptrace.c | 2 ++ 1 file changed, 2 insertions(+)
diff --git a/arch/metag/kernel/ptrace.c b/arch/metag/kernel/ptrace.c index 2e4dfc15abd3..5e2dc7defd2c 100644 --- a/arch/metag/kernel/ptrace.c +++ b/arch/metag/kernel/ptrace.c @@ -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);