From: Chao Yu <chao@kernel.org>
Date: Wed, 5 Apr 2023 22:44:53 +0800
Subject: [PATCH] f2fs: fix to check return value of f2fs_do_truncate_blocks()
References: bsc#1012628
Patch-mainline: 6.3.2
Git-commit: b851ee6ba3cc212641e622ebcf92b950c7bafa07
[ Upstream commit b851ee6ba3cc212641e622ebcf92b950c7bafa07 ]
Otherwise, if truncation on cow_inode failed, remained data may
pollute current transaction of atomic write.
Cc: Daeho Jeong <daehojeong@google.com>
Fixes: a46bebd502fe ("f2fs: synchronize atomic write aborts")
Signed-off-by: Chao Yu <chao@kernel.org>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
Signed-off-by: Jiri Slaby <jslaby@suse.cz>
---
fs/f2fs/file.c | 6 +++++-
1 file changed, 5 insertions(+), 1 deletion(-)
diff --git a/fs/f2fs/file.c b/fs/f2fs/file.c
index 4f684b99..16e286ce 100644
--- a/fs/f2fs/file.c
+++ b/fs/f2fs/file.c
@@ -2113,7 +2113,11 @@ static int f2fs_ioc_start_atomic_write(struct file *filp, bool truncate)
clear_inode_flag(fi->cow_inode, FI_INLINE_DATA);
} else {
/* Reuse the already created COW inode */
- f2fs_do_truncate_blocks(fi->cow_inode, 0, true);
+ ret = f2fs_do_truncate_blocks(fi->cow_inode, 0, true);
+ if (ret) {
+ f2fs_up_write(&fi->i_gc_rwsem[WRITE]);
+ goto out;
+ }
}
f2fs_write_inode(inode, NULL);
--
2.35.3