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| author | Dave Martin <Dave.Martin@arm.com> | 2017-03-27 17:10:57 +0300 |
|---|---|---|
| committer | Sasha Levin <alexander.levin@microsoft.com> | 2018-01-17 20:32:51 +0300 |
| commit | 21af28db5ef7c8bed49f9dfaaa9ad410032b635e (patch) | |
| tree | f438cf829d7d7ef07b7a0c0366d91fb59cf8d76e /arch/metag | |
| parent | 6779b4582eca8357ee731e95185c0f9f20abf71b (diff) | |
| download | linux-21af28db5ef7c8bed49f9dfaaa9ad410032b635e.tar.xz | |
metag/ptrace: Reject partial NT_METAG_RPIPE writes
[ 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>
Diffstat (limited to 'arch/metag')
| -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); |