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: baikal/aarch64/sdk5.9~119
X-Git-Url: https://git.baikalelectronics.ru/?a=commitdiff_plain;h=087d3ae22c811f163d6f24aaa1ebc72d4da130a3;p=kernel.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: 72631fe02974 ("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 ba084b0b214b9..82bb38370aa9a 100644
--- a/fs/affs/file.c
+++ b/fs/affs/file.c
@@ -878,7 +878,7 @@ 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;