From: Dima Zavin <dima@android.com>
Date: Thu, 19 Jan 2012 17:51:07 +0000 (-0800)
Subject: Revert "proc: enable writing to /proc/pid/mem"
X-Git-Tag: firefly_0821_release~7613^2~197
X-Git-Url: http://demsky.eecs.uci.edu/git/?a=commitdiff_plain;h=dac306d896642f3dfcd878ab6a0a5b8c123722f3;p=firefly-linux-kernel-4.4.55.git

Revert "proc: enable writing to /proc/pid/mem"

This reverts commit 198214a7ee50375fa71a65e518341980cfd4b2f0.
---

diff --git a/fs/proc/base.c b/fs/proc/base.c
index efb304854b74..1a8d756021f2 100644
--- a/fs/proc/base.c
+++ b/fs/proc/base.c
@@ -891,6 +891,10 @@ out_no_task:
 	return ret;
 }
 
+#define mem_write NULL
+
+#ifndef mem_write
+/* This is a security hazard */
 static ssize_t mem_write(struct file * file, const char __user *buf,
 			 size_t count, loff_t *ppos)
 {
@@ -949,6 +953,7 @@ out_task:
 out_no_task:
 	return copied;
 }
+#endif
 
 loff_t mem_lseek(struct file *file, loff_t offset, int orig)
 {