All of lore.kernel.org
 help / color / mirror / Atom feed
From: Eric Biggers <ebiggers@kernel.org>
To: linux-fscrypt@vger.kernel.org
Cc: linux-ext4@vger.kernel.org,
	linux-f2fs-devel@lists.sourceforge.net,
	Satya Tangirala <satyat@google.com>,
	Jaegeuk Kim <jaegeuk@kernel.org>
Subject: [PATCH] fscrypt: fix inline encryption not used on new files
Date: Tue, 10 Nov 2020 17:52:24 -0800	[thread overview]
Message-ID: <20201111015224.303073-1-ebiggers@kernel.org> (raw)

From: Eric Biggers <ebiggers@google.com>

The new helper function fscrypt_prepare_new_inode() runs before
S_ENCRYPTED has been set on the new inode.  This accidentally made
fscrypt_select_encryption_impl() never enable inline encryption on newly
created files, due to its use of fscrypt_needs_contents_encryption()
which only returns true when S_ENCRYPTED is set.

Fix this by using S_ISREG() directly instead of
fscrypt_needs_contents_encryption(), analogous to what
select_encryption_mode() does.

I didn't notice this earlier because by design, the user-visible
behavior is the same (other than performance, potentially) regardless of
whether inline encryption is used or not.

Fixes: a992b20cd4ee ("fscrypt: add fscrypt_prepare_new_inode() and fscrypt_set_context()")
Signed-off-by: Eric Biggers <ebiggers@google.com>
---
 fs/crypto/inline_crypt.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/fs/crypto/inline_crypt.c b/fs/crypto/inline_crypt.c
index 89bffa82ed74a..c57bebfa48fea 100644
--- a/fs/crypto/inline_crypt.c
+++ b/fs/crypto/inline_crypt.c
@@ -74,7 +74,7 @@ int fscrypt_select_encryption_impl(struct fscrypt_info *ci)
 	int i;
 
 	/* The file must need contents encryption, not filenames encryption */
-	if (!fscrypt_needs_contents_encryption(inode))
+	if (!S_ISREG(inode->i_mode))
 		return 0;
 
 	/* The crypto mode must have a blk-crypto counterpart */

base-commit: 92cfcd030e4b1de11a6b1edb0840e55c26332d31
-- 
2.29.2


WARNING: multiple messages have this Message-ID (diff)
From: Eric Biggers <ebiggers@kernel.org>
To: linux-fscrypt@vger.kernel.org
Cc: Satya Tangirala <satyat@google.com>,
	Jaegeuk Kim <jaegeuk@kernel.org>,
	linux-ext4@vger.kernel.org,
	linux-f2fs-devel@lists.sourceforge.net
Subject: [f2fs-dev] [PATCH] fscrypt: fix inline encryption not used on new files
Date: Tue, 10 Nov 2020 17:52:24 -0800	[thread overview]
Message-ID: <20201111015224.303073-1-ebiggers@kernel.org> (raw)

From: Eric Biggers <ebiggers@google.com>

The new helper function fscrypt_prepare_new_inode() runs before
S_ENCRYPTED has been set on the new inode.  This accidentally made
fscrypt_select_encryption_impl() never enable inline encryption on newly
created files, due to its use of fscrypt_needs_contents_encryption()
which only returns true when S_ENCRYPTED is set.

Fix this by using S_ISREG() directly instead of
fscrypt_needs_contents_encryption(), analogous to what
select_encryption_mode() does.

I didn't notice this earlier because by design, the user-visible
behavior is the same (other than performance, potentially) regardless of
whether inline encryption is used or not.

Fixes: a992b20cd4ee ("fscrypt: add fscrypt_prepare_new_inode() and fscrypt_set_context()")
Signed-off-by: Eric Biggers <ebiggers@google.com>
---
 fs/crypto/inline_crypt.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/fs/crypto/inline_crypt.c b/fs/crypto/inline_crypt.c
index 89bffa82ed74a..c57bebfa48fea 100644
--- a/fs/crypto/inline_crypt.c
+++ b/fs/crypto/inline_crypt.c
@@ -74,7 +74,7 @@ int fscrypt_select_encryption_impl(struct fscrypt_info *ci)
 	int i;
 
 	/* The file must need contents encryption, not filenames encryption */
-	if (!fscrypt_needs_contents_encryption(inode))
+	if (!S_ISREG(inode->i_mode))
 		return 0;
 
 	/* The crypto mode must have a blk-crypto counterpart */

base-commit: 92cfcd030e4b1de11a6b1edb0840e55c26332d31
-- 
2.29.2



_______________________________________________
Linux-f2fs-devel mailing list
Linux-f2fs-devel@lists.sourceforge.net
https://lists.sourceforge.net/lists/listinfo/linux-f2fs-devel

             reply	other threads:[~2020-11-11  1:52 UTC|newest]

Thread overview: 6+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-11-11  1:52 Eric Biggers [this message]
2020-11-11  1:52 ` [f2fs-dev] [PATCH] fscrypt: fix inline encryption not used on new files Eric Biggers
2020-11-12  2:40 ` Satya Tangirala
2020-11-12  2:40   ` [f2fs-dev] " Satya Tangirala via Linux-f2fs-devel
2020-11-12 20:29 ` Eric Biggers
2020-11-12 20:29   ` [f2fs-dev] " Eric Biggers

Reply instructions:

You may reply publicly to this message via plain-text email
using any one of the following methods:

* Save the following mbox file, import it into your mail client,
  and reply-to-all from there: mbox

  Avoid top-posting and favor interleaved quoting:
  https://en.wikipedia.org/wiki/Posting_style#Interleaved_style

* Reply using the --to, --cc, and --in-reply-to
  switches of git-send-email(1):

  git send-email \
    --in-reply-to=20201111015224.303073-1-ebiggers@kernel.org \
    --to=ebiggers@kernel.org \
    --cc=jaegeuk@kernel.org \
    --cc=linux-ext4@vger.kernel.org \
    --cc=linux-f2fs-devel@lists.sourceforge.net \
    --cc=linux-fscrypt@vger.kernel.org \
    --cc=satyat@google.com \
    /path/to/YOUR_REPLY

  https://kernel.org/pub/software/scm/git/docs/git-send-email.html

* If your mail client supports setting the In-Reply-To header
  via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line before the message body. 
This is an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.