1 files changed, 11 insertions, 0 deletions

diff --git a/arch/x86/entry/entry_32.S b/arch/x86/entry/entry_32.S
index 983e5d3a0d27..0b56666e6039 100644
--- a/arch/x86/entry/entry_32.S
+++ b/arch/x86/entry/entry_32.S
@@ -1153,3 +1153,14 @@ ENTRY(async_page_fault)
         jmp     error_code
 END(async_page_fault)
 #endif
+
+ENTRY(rewind_stack_do_exit)
+        /* Prevent any naive code from trying to unwind to our caller. */
+        xorl    %ebp, %ebp
+
+        movl    PER_CPU_VAR(cpu_current_top_of_stack), %esi
+        leal    -TOP_OF_KERNEL_STACK_PADDING-PTREGS_SIZE(%esi), %esp
+
+        call    do_exit
+1:      jmp 1b
+END(rewind_stack_do_exit)