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Date: Mon, 13 Apr 2020 18:32:11 +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 5/5] Hardening : PPC book3s64: Forbid writes to read-only memory pages of a process
Signed-off-by: Lev Olshvang <levonshe@...il.com>
---
arch/powerpc/mm/book3s64/pkeys.c | 5 -----
1 file changed, 5 deletions(-)
diff --git a/arch/powerpc/mm/book3s64/pkeys.c b/arch/powerpc/mm/book3s64/pkeys.c
index 4c537af6ab01..1199fc2bfaec 100644
--- a/arch/powerpc/mm/book3s64/pkeys.c
+++ b/arch/powerpc/mm/book3s64/pkeys.c
@@ -384,11 +384,6 @@ bool arch_pte_access_permitted(u64 pte, bool write, bool execute)
bool arch_vma_access_permitted(struct vm_area_struct *vma, bool write,
bool execute, bool foreign)
{
- if (unlikely(!vma_write_allowed(vma, write, execute, foreign))) {
- pr_err_once("Error : PID[%d] %s writes to read only memory\n",
- current->tgid, current->comm);
- return false;
- }
if (static_branch_likely(&pkey_disabled))
return true;
/*
--
2.17.1
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