From bdc772adbd2de9384a869e06d2a72f31a5a6d1cb Mon Sep 17 00:00:00 2001
From: "chunhui.li" <chunhui.li@mediatek.com>
Date: Tue, 4 Jan 2022 15:16:58 +0800
Subject: [PATCH] ANDROID: kernel: fix debug_kinfo set twice crash issue

  If write string to /sys/module/debug_kinfo/parameters/build_info
twice, kernel will crash. fix by removing vunmap in build_info_set.

Bug: 213120696
Signed-off-by: Chunhui Li <chunhui.li@mediatek.com>
Change-Id: I683859067a31068de0006be8490efa4b0107044f
---
 drivers/staging/android/debug_kinfo.c | 1 -
 1 file changed, 1 deletion(-)

diff --git a/drivers/staging/android/debug_kinfo.c b/drivers/staging/android/debug_kinfo.c
index 8e67fb3a205f..6a162325911e 100644
--- a/drivers/staging/android/debug_kinfo.c
+++ b/drivers/staging/android/debug_kinfo.c
@@ -81,7 +81,6 @@ static int build_info_set(const char *str, const struct kernel_param *kp)
 	}
 
 Exit:
-	vunmap(all_info_addr);
 	return ret;
 }