1 files changed, 5 insertions, 0 deletions

diff --git a/arch/um/kernel/trap.c b/arch/um/kernel/trap.c
index 8e4daf44e980..34b633ec852f 100644
--- a/arch/um/kernel/trap.c
+++ b/arch/um/kernel/trap.c
@@ -219,6 +219,11 @@ unsigned long segv(struct faultinfo fi, unsigned long ip, int is_user,
                 show_regs(container_of(regs, struct pt_regs, regs));
                 panic("Segfault with no mm");
         }
+        else if (!is_user && address < TASK_SIZE) {
+                show_regs(container_of(regs, struct pt_regs, regs));
+                panic("Kernel tried to access user memory at addr 0x%lx, ip 0x%lx",
+                       address, ip);
+        }
 
         if (SEGV_IS_FIXABLE(&fi))
                 err = handle_page_fault(address, ip, is_write, is_user,