arm64: Enable interrupts in the EL0 undef handler

do_undefinstr() has to be called with interrupts disabled since it may
read the instruction from the user address space which could lead to a
data abort and subsequent might_sleep() warning in do_page_fault().

Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>

1 files changed, 2 insertions, 0 deletions

diff --git a/arch/arm64/kernel/entry.S b/arch/arm64/kernel/entry.S
index 6ad781b21c08..57640df9d70c 100644
--- a/arch/arm64/kernel/entry.S
+++ b/arch/arm64/kernel/entry.S
@@ -476,6 +476,8 @@ el0_undef:
          * Undefined instruction
          */
         mov     x0, sp
+        // enable interrupts before calling the main handler
+        enable_irq
         b       do_undefinstr
 el0_dbg:
         /*