diff options
author | Dave Martin <Dave.Martin@arm.com> | 2017-01-18 17:11:56 +0100 |
---|---|---|
committer | Sasha Levin <alexander.levin@verizon.com> | 2017-03-06 17:31:12 -0500 |
commit | c59ef58eddf01dc661973a6c00030f006ce928cd (patch) | |
tree | 9101636f771693e29b9b841f95921d89df84e49d | |
parent | c616b2480f8aac4400423ee13ebd267b923bc15e (diff) |
ARM: 8643/3: arm/ptrace: Preserve previous registers for short regset write
[ Upstream commit 228dbbfb5d77f8e047b2a1d78da14b7158433027 ]
Ensure that if userspace supplies insufficient data to
PTRACE_SETREGSET to fill all the registers, the thread's old
registers are preserved.
Cc: <stable@vger.kernel.org> # 3.0.x-
Fixes: 5be6f62b0059 ("ARM: 6883/1: ptrace: Migrate to regsets framework")
Signed-off-by: Dave Martin <Dave.Martin@arm.com>
Acked-by: Russell King <rmk+kernel@armlinux.org.uk>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
Signed-off-by: Sasha Levin <alexander.levin@verizon.com>
-rw-r--r-- | arch/arm/kernel/ptrace.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/arch/arm/kernel/ptrace.c b/arch/arm/kernel/ptrace.c index 4d9375814b53..d54c53b7ab63 100644 --- a/arch/arm/kernel/ptrace.c +++ b/arch/arm/kernel/ptrace.c @@ -600,7 +600,7 @@ static int gpr_set(struct task_struct *target, const void *kbuf, const void __user *ubuf) { int ret; - struct pt_regs newregs; + struct pt_regs newregs = *task_pt_regs(target); ret = user_regset_copyin(&pos, &count, &kbuf, &ubuf, &newregs, |