From: Yunlei He heyunlei@oppo.com
[ 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@oppo.com Reviewed-by: Chao Yu chao@kernel.org Signed-off-by: Jaegeuk Kim jaegeuk@kernel.org Signed-off-by: Sasha Levin sashal@kernel.org --- fs/f2fs/super.c | 2 -- 1 file changed, 2 deletions(-)
diff --git a/fs/f2fs/super.c b/fs/f2fs/super.c index df1e5496352c2..706d7adda3b22 100644 --- a/fs/f2fs/super.c +++ b/fs/f2fs/super.c @@ -2068,8 +2068,6 @@ static void default_options(struct f2fs_sb_info *sbi) F2FS_OPTION(sbi).compress_mode = COMPR_MODE_FS; F2FS_OPTION(sbi).bggc_mode = BGGC_MODE_ON;
- sbi->sb->s_flags &= ~SB_INLINECRYPT; - set_opt(sbi, INLINE_XATTR); set_opt(sbi, INLINE_DATA); set_opt(sbi, INLINE_DENTRY);