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Message-Id: <20200413153211.29876-4-levonshe@gmail.com>
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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