diff options
| author | Dave Martin <Dave.Martin@arm.com> | 2017-03-27 15:10:57 +0100 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2017-03-31 10:31:46 +0200 |
| commit | 21c95eca627bf63fa56dc19f5fb5fb2a770dadc0 (patch) | |
| tree | d83d5e2a515fa0cc510ed0a8ee80a0a7799d448a | |
| parent | 2d6532ceb45bffcc05036f93a0590ffa82c7794f (diff) | |
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: 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: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
| -rw-r--r-- | arch/metag/kernel/ptrace.c | 2 |
1 files changed, 2 insertions, 0 deletions
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); |