From: Alexander Potapenko <glider@google.com>
Date: Tue, 10 Jan 2023 12:49:30 +0000 (+0100)
Subject: affs: initialize fsdata in affs_truncate()
X-Git-Tag: v5.15.92~199
X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=b7a479c76481f85f8b39a59c9aff4737b761158c;p=platform%2Fkernel%2Flinux-rpi.git

affs: initialize fsdata in affs_truncate()

[ Upstream commit eef034ac6690118c88f357b00e2b3239c9d8575d ]

When aops->write_begin() does not initialize fsdata, KMSAN may report
an error passing the latter to aops->write_end().

Fix this by unconditionally initializing fsdata.

Fixes: f2b6a16eb8f5 ("fs: affs convert to new aops")
Suggested-by: Eric Biggers <ebiggers@kernel.org>
Signed-off-by: Alexander Potapenko <glider@google.com>
Reviewed-by: David Sterba <dsterba@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---

diff --git a/fs/affs/file.c b/fs/affs/file.c
index 75ebd2b..25d480e 100644
--- a/fs/affs/file.c
+++ b/fs/affs/file.c
@@ -881,7 +881,7 @@ affs_truncate(struct inode *inode)
 	if (inode->i_size > AFFS_I(inode)->mmu_private) {
 		struct address_space *mapping = inode->i_mapping;
 		struct page *page;
-		void *fsdata;
+		void *fsdata = NULL;
 		loff_t isize = inode->i_size;
 		int res;