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author | Dave Martin <Dave.Martin@arm.com> | 2017-01-18 16:11:56 (GMT) |
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committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2017-02-14 23:25:35 (GMT) |
commit | bd7d069c7635da0276ce0f25155514b117b0b1eb (patch) | |
tree | a242087e1f5f621c724456eca054a9490c5d5a9f /arch/arm | |
parent | 14cdf0f590447c4f7c5e1567ce73c81b2d9fe80b (diff) | |
download | linux-bd7d069c7635da0276ce0f25155514b117b0b1eb.tar.xz |
ARM: 8643/3: arm/ptrace: Preserve previous registers for short regset write
commit 228dbbfb5d77f8e047b2a1d78da14b7158433027 upstream.
Ensure that if userspace supplies insufficient data to
PTRACE_SETREGSET to fill all the registers, the thread's old
registers are preserved.
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: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'arch/arm')
-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 ce131ed..ae738a6 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, |