summaryrefslogtreecommitdiff
path: root/arch
diff options
context:
space:
mode:
authorDave Martin <Dave.Martin@arm.com>2017-01-18 17:11:56 +0100
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>2017-02-14 15:22:51 -0800
commitfcc038db59597e05030a757c4df8e58d2d8919ab (patch)
treef865cbe813408bfc17d8ae44c6e255925bf7c77c /arch
parentcc187c6200f8316cc211d77fc35f269e7135fab4 (diff)
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')
-rw-r--r--arch/arm/kernel/ptrace.c2
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,