| From | Greg Kroah-Hartman <> | Subject | [PATCH 3.18 025/124] metag/ptrace: Preserve previous registers for short regset write | Date | Thu, 20 Apr 2017 08:35:00 +0200 |
| |
3.18-stable review patch. If anyone has any objections, please let me know.
------------------
From: Dave Martin <Dave.Martin@arm.com>
commit a78ce80d2c9178351b34d78fec805140c29c193e 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> Acked-by: James Hogan <james.hogan@imgtec.com> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
--- arch/metag/kernel/ptrace.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)
--- a/arch/metag/kernel/ptrace.c +++ b/arch/metag/kernel/ptrace.c @@ -303,7 +303,7 @@ static int metag_tls_set(struct task_str const void *kbuf, const void __user *ubuf) { int ret; - void __user *tls; + void __user *tls = target->thread.tls_ptr; ret = user_regset_copyin(&pos, &count, &kbuf, &ubuf, &tls, 0, -1); if (ret)
|