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authorDave Martin <Dave.Martin@arm.com>2017-01-06 17:54:51 +0000
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>2017-02-01 08:30:52 +0100
commit23bc4e136bca4607f39d65df1ee8ca64359ea2a6 (patch)
tree18e6b9a28caa51a68d747306e5a2445ffbe51caf /arch
parent63db7c91a3c0ebe0e291feea53e4c63391db9465 (diff)
tile/ptrace: Preserve previous registers for short regset write
commit fd7c99142d77dc4a851879a66715abf12a3193fb upstream. Ensure that if userspace supplies insufficient data to PTRACE_SETREGSET to fill all the registers, the thread's old registers are preserved. Signed-off-by: Dave Martin <Dave.Martin@arm.com> Signed-off-by: Chris Metcalf <cmetcalf@mellanox.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'arch')
-rw-r--r--arch/tile/kernel/ptrace.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/arch/tile/kernel/ptrace.c b/arch/tile/kernel/ptrace.c
index bdc126faf741..6239aa155f6d 100644
--- a/arch/tile/kernel/ptrace.c
+++ b/arch/tile/kernel/ptrace.c
@@ -111,7 +111,7 @@ static int tile_gpr_set(struct task_struct *target,
const void *kbuf, const void __user *ubuf)
{
int ret;
- struct pt_regs regs;
+ struct pt_regs regs = *task_pt_regs(target);
ret = user_regset_copyin(&pos, &count, &kbuf, &ubuf, &regs, 0,
sizeof(regs));