Merge tag 'arm64-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux

Pull arm64 fix from Catalin Marinas:
 "Fix unwind_frame() in the context of pseudo NMI"

* tag 'arm64-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux:
  arm64: fix wrong check of on_sdei_stack in nmi context

1 files changed, 6 insertions, 0 deletions

diff --git a/arch/arm64/kernel/sdei.c b/arch/arm64/kernel/sdei.c
index 5ba4465e44f0..ea94cf8f9dc6 100644
--- a/arch/arm64/kernel/sdei.c
+++ b/arch/arm64/kernel/sdei.c
@@ -94,6 +94,9 @@ static bool on_sdei_normal_stack(unsigned long sp, struct stack_info *info)
         unsigned long low = (unsigned long)raw_cpu_read(sdei_stack_normal_ptr);
         unsigned long high = low + SDEI_STACK_SIZE;
 
+        if (!low)
+                return false;
+
         if (sp < low || sp >= high)
                 return false;
 
@@ -111,6 +114,9 @@ static bool on_sdei_critical_stack(unsigned long sp, struct stack_info *info)
         unsigned long low = (unsigned long)raw_cpu_read(sdei_stack_critical_ptr);
         unsigned long high = low + SDEI_STACK_SIZE;
 
+        if (!low)
+                return false;
+
         if (sp < low || sp >= high)
                 return false;