From: Jan Kara <jack@suse.cz>
Date: Tue, 13 Jun 2017 14:08:52 +0000 (+0200)
Subject: udf: Use i_size_read() in udf_adinicb_writepage()
X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=146c4ad6ec034a1fbfbf90ba76cb69b6504c374a;p=GitHub%2Fmoto-9609%2Fandroid_kernel_motorola_exynos9610.git

udf: Use i_size_read() in udf_adinicb_writepage()

We don't hold inode_lock in udf_adinicb_writepage() so use i_size_read()
to get i_size. This cannot cause real problems is i_size is guaranteed
to be small but let's be careful.

Signed-off-by: Jan Kara <jack@suse.cz>
---

diff --git a/fs/udf/file.c b/fs/udf/file.c
index e06d2c15749a..356c2bf148a5 100644
--- a/fs/udf/file.c
+++ b/fs/udf/file.c
@@ -76,7 +76,8 @@ static int udf_adinicb_writepage(struct page *page,
 	BUG_ON(!PageLocked(page));
 
 	kaddr = kmap_atomic(page);
-	memcpy(iinfo->i_ext.i_data + iinfo->i_lenEAttr, kaddr, inode->i_size);
+	memcpy(iinfo->i_ext.i_data + iinfo->i_lenEAttr, kaddr,
+		i_size_read(inode));
 	SetPageUptodate(page);
 	kunmap_atomic(kaddr);
 	mark_inode_dirty(inode);