[PATCH AUTOSEL 6.6 02/20] f2fs: remove clear SB_INLINECRYPT flag in default_options

From: Sasha Levin
Date: Wed Jun 05 2024 - 08:04:49 EST


From: Yunlei He <heyunlei@xxxxxxxx>

[ Upstream commit ac5eecf481c29942eb9a862e758c0c8b68090c33 ]

In f2fs_remount, SB_INLINECRYPT flag will be clear and re-set.
If create new file or open file during this gap, these files
will not use inlinecrypt. Worse case, it may lead to data
corruption if wrappedkey_v0 is enable.

Thread A: Thread B:

-f2fs_remount -f2fs_file_open or f2fs_new_inode
-default_options
<- clear SB_INLINECRYPT flag

-fscrypt_select_encryption_impl

-parse_options
<- set SB_INLINECRYPT again

Signed-off-by: Yunlei He <heyunlei@xxxxxxxx>
Reviewed-by: Chao Yu <chao@xxxxxxxxxx>
Signed-off-by: Jaegeuk Kim <jaegeuk@xxxxxxxxxx>
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
---
fs/f2fs/super.c | 2 --
1 file changed, 2 deletions(-)

diff --git a/fs/f2fs/super.c b/fs/f2fs/super.c
index ab437022ea56f..5d294c8a025ca 100644
--- a/fs/f2fs/super.c
+++ b/fs/f2fs/super.c
@@ -2186,8 +2186,6 @@ static void default_options(struct f2fs_sb_info *sbi, bool remount)
F2FS_OPTION(sbi).memory_mode = MEMORY_MODE_NORMAL;
F2FS_OPTION(sbi).errors = MOUNT_ERRORS_CONTINUE;

- sbi->sb->s_flags &= ~SB_INLINECRYPT;
-
set_opt(sbi, INLINE_XATTR);
set_opt(sbi, INLINE_DATA);
set_opt(sbi, INLINE_DENTRY);
--
2.43.0