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Date: Mon, 13 Apr 2020 18:32:09 +0300
From: Lev Olshvang <levonshe@...il.com>
To: keescook@...omium.orh
Cc: kernel-hardening@...ts.openwall.com,
	Lev Olshvang <levonshe@...il.com>
Subject: [PATCH v3 3/5] Hardening um: Forbid writes to read-only memory pages of a process

Signed-off-by: Lev Olshvang <levonshe@...il.com>
---
 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

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