From 143148444ddd57cfd3b26868eec6d2a5dbb3b0dd Mon Sep 17 00:00:00 2001
From: xieliujie <xieliujie@oppo.com>
Date: Mon, 21 Jun 2021 18:42:37 +0800
Subject: [PATCH] FROMLIST: staging: android: ashmem: add size field in procfs
 fdinfo

add this information to help user to find ashmem problem.

ashmem leak scenario:
-000|fd = ashmem_create_region
-001|mmap and pagefault
-002|munmap
-003|forget close(fd) <---- which lead to ashmem leak

Link: https://lore.kernel.org/patchwork/patch/1448571
Bug: 191291741
Signed-off-by: liuhailong <liuhailong@oppo.com>
Signed-off-by: xieliujie <xieliujie@oppo.com>
Change-Id: I68ac5a42357eff11056c9ed1207da07fefbea77d
---
 drivers/staging/android/ashmem.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/drivers/staging/android/ashmem.c b/drivers/staging/android/ashmem.c
index 10b4be1f3e78..900cad5d79da 100644
--- a/drivers/staging/android/ashmem.c
+++ b/drivers/staging/android/ashmem.c
@@ -894,6 +894,8 @@ static void ashmem_show_fdinfo(struct seq_file *m, struct file *file)
 		seq_printf(m, "name:\t%s\n",
 			   asma->name + ASHMEM_NAME_PREFIX_LEN);
 
+	seq_printf(m, "size:\t%zu\n", asma->size);
+
 	mutex_unlock(&ashmem_mutex);
 }
 #endif