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| author | Dave Martin <Dave.Martin@arm.com> | 2017-01-18 17:11:56 +0100 |
|---|---|---|
| committer | Russell King <rmk+kernel@armlinux.org.uk> | 2017-01-30 12:04:12 +0000 |
| commit | 228dbbfb5d77f8e047b2a1d78da14b7158433027 (patch) | |
| tree | 755364110d50fc4deb8bbf4a5a228faac3122460 /arch/arm/kernel | |
| parent | 97a98ae5b8acf08d07d972c087b2def060bc9b73 (diff) | |
| download | linux-stable-228dbbfb5d77f8e047b2a1d78da14b7158433027.tar.gz linux-stable-228dbbfb5d77f8e047b2a1d78da14b7158433027.tar.bz2 linux-stable-228dbbfb5d77f8e047b2a1d78da14b7158433027.zip | |
ARM: 8643/3: arm/ptrace: Preserve previous registers for short regset write
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>
Diffstat (limited to 'arch/arm/kernel')
| -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 ce131ed5939d..ae738a6319f6 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, |