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From: Richard Weinberger <richard@nod.at>
To: linux-mtd@lists.infradead.org
Cc: linux-kernel@vger.kernel.org, linux-fsdevel@vger.kernel.org,
	dedekind1@gmail.com, adrian.hunter@intel.com, tytso@mit.edu,
	jaegeuk@kernel.org, david@sigma-star.at, wd@denx.de,
	sbabic@denx.de, dengler@linutronix.de,
	Richard Weinberger <richard@nod.at>
Subject: [PATCH 12/26] ubifs: Massage assert in ubifs_xattr_set() wrt. fscrypto
Date: Fri, 21 Oct 2016 14:48:27 +0200	[thread overview]
Message-ID: <1477054121-10198-13-git-send-email-richard@nod.at> (raw)
In-Reply-To: <1477054121-10198-1-git-send-email-richard@nod.at>

When we're creating a new inode in UBIFS the inode is not
yet exposed and fscrypto calls ubifs_xattr_set() without
holding the inode mutex. This is okay but ubifs_xattr_set()
has to know about this.

Signed-off-by: Richard Weinberger <richard@nod.at>
---
 fs/ubifs/xattr.c | 8 +++++++-
 1 file changed, 7 insertions(+), 1 deletion(-)

diff --git a/fs/ubifs/xattr.c b/fs/ubifs/xattr.c
index 54ec2b9fd506..d3b53c55ea39 100644
--- a/fs/ubifs/xattr.c
+++ b/fs/ubifs/xattr.c
@@ -286,7 +286,13 @@ int ubifs_xattr_set(struct inode *host, const char *name, const void *value,
 	union ubifs_key key;
 	int err;
 
-	ubifs_assert(inode_is_locked(host));
+	/*
+	 * Creating an encryption context is done unlocked since we
+	 * operate on a new inode which is not visible to other users
+	 * at this point.
+	 */
+	if (strcmp(name, UBIFS_XATTR_NAME_ENCRYPTION_CONTEXT) != 0)
+		ubifs_assert(inode_is_locked(host));
 
 	if (size > UBIFS_MAX_INO_DATA)
 		return -ERANGE;
-- 
2.7.3

  parent reply	other threads:[~2016-10-21 12:59 UTC|newest]

Thread overview: 50+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2016-10-21 12:48 [PATCH 00/26] UBIFS File Encryption Richard Weinberger
2016-10-21 12:48 ` [PATCH 01/26] fscrypto: Add buffer operations Richard Weinberger
2016-10-21 13:05   ` Christoph Hellwig
2016-10-21 13:17     ` Richard Weinberger
2016-10-21 13:24       ` Christoph Hellwig
2016-10-21 15:14         ` Theodore Ts'o
2016-10-24  7:05         ` Richard Weinberger
2016-10-21 12:48 ` [PATCH 02/26] fscrypto: Constify struct inode pointer Richard Weinberger
2016-10-21 14:57   ` Theodore Ts'o
2016-10-21 15:10     ` Richard Weinberger
2016-10-21 12:48 ` [PATCH 03/26] ubifs: Export ubifs_check_dir_empty() Richard Weinberger
2016-10-21 12:48 ` [PATCH 04/26] ubifs: Export xattr get and set functions Richard Weinberger
2016-10-21 12:48 ` [PATCH 05/26] ubifs: Define UBIFS crypto context xattr Richard Weinberger
2016-10-21 12:48 ` [PATCH 06/26] ubifs: Add skeleton for fscrypto Richard Weinberger
2016-10-21 12:48 ` [PATCH 07/26] ubifs: Massage ubifs_listxattr() for encryption context Richard Weinberger
2016-10-21 12:48 ` [PATCH 08/26] ubifs: Implement directory open operation Richard Weinberger
2016-10-21 12:48 ` [PATCH 09/26] ubifs: Implement file " Richard Weinberger
2016-10-21 12:48 ` [PATCH 10/26] ubifs: Enforce crypto policy in ->link and ->rename Richard Weinberger
2016-10-21 12:48 ` [PATCH 11/26] ubifs: Preload crypto context in ->lookup() Richard Weinberger
2016-10-21 12:48 ` Richard Weinberger [this message]
2016-10-21 12:48 ` [PATCH 13/26] ubifs: Enforce crypto policy in mmap Richard Weinberger
2016-10-21 12:48 ` [PATCH 14/26] ubifs: Introduce new data node field, compr_size Richard Weinberger
2016-10-21 12:48 ` [PATCH 15/26] ubifs: Implement encrypt/decrypt for all IO Richard Weinberger
2016-10-21 17:14   ` Michael Halcrow
2016-10-21 17:21     ` Richard Weinberger
2016-10-21 17:52       ` Michael Halcrow
2016-10-21 18:21         ` Richard Weinberger
2016-10-21 18:25   ` Eric Biggers
2016-10-24  7:00     ` Richard Weinberger
2016-10-21 12:48 ` [PATCH 16/26] ubifs: Relax checks in ubifs_validate_entry() Richard Weinberger
2016-10-21 12:48 ` [PATCH 17/26] ubifs: Make r5 hash binary string aware Richard Weinberger
2016-10-21 12:48 ` [PATCH 18/26] ubifs: Constify struct inode pointer in ubifs_crypt_is_encrypted() Richard Weinberger
2016-10-21 12:48 ` [PATCH 19/26] ubifs: Implement encrypted filenames Richard Weinberger
2016-10-21 12:48 ` [PATCH 20/26] ubifs: Add support for encrypted symlinks Richard Weinberger
2016-10-21 18:42   ` Eric Biggers
2016-10-24  6:54     ` Richard Weinberger
2016-10-21 12:48 ` [PATCH 21/26] ubifs: Rename tnc_read_node_nm Richard Weinberger
2016-10-21 12:48 ` [PATCH 22/26] ubifs: Add full hash lookup support Richard Weinberger
2016-10-21 12:48 ` [PATCH 23/26] ubifs: Use a random number for cookies Richard Weinberger
2016-10-21 12:48 ` [PATCH 24/26] ubifs: Implement UBIFS_FLG_DOUBLE_HASH Richard Weinberger
2016-10-21 12:48 ` [PATCH 25/26] ubifs: Implement UBIFS_FLG_ENCRYPTION Richard Weinberger
2016-10-21 18:30   ` Eric Biggers
2016-10-24  6:59     ` Richard Weinberger
2016-10-24 13:48       ` Theodore Ts'o
2016-10-21 12:48 ` [PATCH 26/26] ubifs: Raise write version to 5 Richard Weinberger
2016-10-21 17:31   ` Michael Halcrow
2016-10-21 17:47     ` Theodore Ts'o
2016-10-21 18:19       ` Eric Biggers
2016-10-21 22:34         ` Theodore Ts'o
2016-10-24  7:03       ` Richard Weinberger

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