[PATCH v3 3/5] Hardening um: Forbid writes to read-only memory pages of a process

Lev Olshvang
2020-04-13T15:33:17Z

arch/um/include/asm/mmu_context.h | 8 +-------
1 file changed, 1 insertion(+), 7 deletions(-)

diff --git a/arch/um/include/asm/mmu_context.h b/arch/um/include/asm/mmu_context.h
index 3dcee05f950f..b4deb1bfbb68 100644
--- a/arch/um/include/asm/mmu_context.h
+++ b/arch/um/include/asm/mmu_context.h
@@ -8,7 +8,6 @@

#include <linux/sched.h>
#include <linux/mm_types.h>
-#include <linux/mm.h>

#include <asm/mmu.h>

@@ -30,12 +29,7 @@ static inline bool arch_vma_access_permitted(struct vm_area_struct *vma,
bool write, bool execute, bool foreign)
{
/* by default, allow everything */
- if (likely(vma_write_allowed(vma, write, execute, foreign)))
- return true;
-
- pr_err_once("Error : PID[%d] %s writes to read only memory\n",
- current->tgid, current->comm);
- return false;
+ return true;
}

/*
--
2.17.1