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Message-Id: <20200413153211.29876-3-levonshe@gmail.com>
Date: Mon, 13 Apr 2020 18:32:08 +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 2/5] Hardening PowerPC: Forbid writes to read-only memory pages of a process
Signed-off-by: Lev Olshvang <levonshe@...il.com>
---
arch/powerpc/include/asm/mmu_context.h | 9 +--------
1 file changed, 1 insertion(+), 8 deletions(-)
diff --git a/arch/powerpc/include/asm/mmu_context.h b/arch/powerpc/include/asm/mmu_context.h
index ddd6d01dd2a1..f4b6b44e304c 100644
--- a/arch/powerpc/include/asm/mmu_context.h
+++ b/arch/powerpc/include/asm/mmu_context.h
@@ -10,7 +10,6 @@
#include <asm/mmu.h>
#include <asm/cputable.h>
#include <asm/cputhreads.h>
-#include <linux/sched.h>
/*
* Most if the context management is out of line
@@ -248,15 +247,9 @@ 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;
}
-#endif
#define pkey_mm_init(mm)
#define thread_pkey_regs_save(thread)
#define thread_pkey_regs_restore(new_thread, old_thread)
--
2.17.1
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