From: Jaegeuk Kim <jaegeuk@kernel.org>
Date: Fri, 17 Mar 2017 02:04:15 +0000 (+0800)
Subject: f2fs: don't allow atomic writes for not regular files
X-Git-Url: https://git.stricted.de/?p=GitHub%2FLineageOS%2Fandroid_kernel_motorola_exynos9610.git;a=commitdiff_plain;h=e811898c97f83aef6c1652fbfbf5294bf542159c

f2fs: don't allow atomic writes for not regular files

The atomic writes only supports regular files for database.

Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
---

diff --git a/fs/f2fs/file.c b/fs/f2fs/file.c
index 3212dfa1a50e..2cf16ed5b74c 100644
--- a/fs/f2fs/file.c
+++ b/fs/f2fs/file.c
@@ -1518,6 +1518,9 @@ static int f2fs_ioc_start_atomic_write(struct file *filp)
 	if (!inode_owner_or_capable(inode))
 		return -EACCES;
 
+	if (!S_ISREG(inode->i_mode))
+		return -EINVAL;
+
 	ret = mnt_want_write_file(filp);
 	if (ret)
 		return ret;