diff mbox series

[v3,2/5] Hardening PowerPC: Forbid writes to read-only memory pages of a process

Message ID 20200413153211.29876-3-levonshe@gmail.com (mailing list archive)
State New, archived
Headers show
Series hardening : prevent write to proces's read-only pages | expand

Commit Message

Lev R. Oshvang . April 13, 2020, 3:32 p.m. UTC 
Signed-off-by: Lev Olshvang <levonshe@gmail.com>
---
 arch/powerpc/include/asm/mmu_context.h | 9 +--------
 1 file changed, 1 insertion(+), 8 deletions(-)
diff mbox series

Patch

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)