Acquire write permissions before zeroing page in ELF loader

f81b722bf004177eadaf6f1b4b9e699e20257521 is a regression.  If a
read-only segment does not begin on a page boundary, it would cause
the ELF loader to blow up.

1 files changed, 2 insertions, 1 deletions

diff --git a/pk/mmap.c b/pk/mmap.c
index e00d18e..1fac4c8 100644
--- a/pk/mmap.c
+++ b/pk/mmap.c
@@ -354,7 +354,8 @@ uintptr_t do_mprotect(uintptr_t addr, size_t length, int prot)
       }
     }
   spinlock_unlock(&vm_lock);
- 
+
+  flush_tlb();
   return res;
 }