tree 31a16594af6cbdf511dadea88664a213e44a52d8
parent 93032e31a5f12df847639db3ad0b7f300bf44b7b
author Matt Redfearn <matt.redfearn@imgtec.com> 1476721306 +0100
committer Ralf Baechle <ralf@linux-mips.org> 1478215849 +0100

MIPS: KASLR: Fix handling of NULL FDT

If platform code returns a NULL pointer to the FDT, initial_boot_params
will not get set to a valid pointer and attempting to find the /chosen
node in it will cause a NULL pointer dereference and the kernel to crash
immediately on startup - with no output to the console.

Fix this by checking that initial_boot_params is valid before using it.

Fixes: 405bc8fd12f5 ("MIPS: Kernel: Implement KASLR using CONFIG_RELOCATABLE")
Cc: stable@vger.kernel.org # 4.7+
Signed-off-by: Matt Redfearn <matt.redfearn@imgtec.com>
Cc: linux-mips@linux-mips.org
Cc: linux-kernel@vger.kernel.org
Patchwork: https://patchwork.linux-mips.org/patch/14414/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>