parisc: also set iaoq_b in instruction_pointer_set()

commit f324fa58327791b2696628b31480e7e21c745706 upstream.

When setting the instruction pointer on PA-RISC we also need
to set the back of the instruction queue to the new offset, otherwise
we will execute on instruction from the new location, and jumping
back to the old location stored in iaoq_b.

Signed-off-by: Sven Schnelle <svens@stackframe.org>
Signed-off-by: Helge Deller <deller@gmx.de>
Fixes: 75ebedf1d263 ("parisc: Add HAVE_REGS_AND_STACK_ACCESS_API feature")
Cc: stable@vger.kernel.org # 4.19+
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/arch/parisc/include/asm/ptrace.h b/arch/parisc/include/asm/ptrace.h
index 4a87b3d600c61007b5cc6751cf763555ad83e6bb..9ff033d261ab381c9e356fea458d768170f9effc 100644 (file)
--- a/arch/parisc/include/asm/ptrace.h
+++ b/arch/parisc/include/asm/ptrace.h
@@ -28,7 +28,8 @@ static inline unsigned long regs_return_value(struct pt_regs *regs)
 static inline void instruction_pointer_set(struct pt_regs *regs,
                                                unsigned long val)
 {
-        regs->iaoq[0] = val;
+       regs->iaoq[0] = val;
+       regs->iaoq[1] = val + 4;
 }
 
 /* Query offset/name of register from its name/offset */