From: "Eric W. Biederman" <ebiederm@xmission.com>
To: <linux-fsdevel@vger.kernel.org>
Cc: <linux-kernel@vger.kernel.org>, Serge Hallyn <serge@hallyn.com>,
Linux Containers <containers@lists.linux-foundation.org>,
"Eric W. Biederman" <ebiederm@xmission.com>,
William Irwin <wli@holomorphy.com>
Subject: [PATCH 05/25] userns: Convert hugetlbfs to use kuid/kgid where appropriate
Date: Thu, 20 Sep 2012 04:41:46 -0700 [thread overview]
Message-ID: <1348141326-23355-5-git-send-email-ebiederm@xmission.com> (raw)
In-Reply-To: <1348141326-23355-1-git-send-email-ebiederm@xmission.com>
From: "Eric W. Biederman" <ebiederm@xmission.com>
Note sysctl_hugetlb_shm_group can only be written in the root user
in the initial user namespace, so we can assume sysctl_hugetlb_shm_group
is in the initial user namespace.
Cc: William Irwin <wli@holomorphy.com>
Acked-by: Serge Hallyn <serge.hallyn@canonical.com>
Signed-off-by: Eric W. Biederman <ebiederm@xmission.com>
---
fs/hugetlbfs/inode.c | 16 +++++++++++-----
init/Kconfig | 1 -
2 files changed, 11 insertions(+), 6 deletions(-)
diff --git a/fs/hugetlbfs/inode.c b/fs/hugetlbfs/inode.c
index 8349a89..6e572c4 100644
--- a/fs/hugetlbfs/inode.c
+++ b/fs/hugetlbfs/inode.c
@@ -42,8 +42,8 @@ static const struct inode_operations hugetlbfs_dir_inode_operations;
static const struct inode_operations hugetlbfs_inode_operations;
struct hugetlbfs_config {
- uid_t uid;
- gid_t gid;
+ kuid_t uid;
+ kgid_t gid;
umode_t mode;
long nr_blocks;
long nr_inodes;
@@ -785,13 +785,17 @@ hugetlbfs_parse_options(char *options, struct hugetlbfs_config *pconfig)
case Opt_uid:
if (match_int(&args[0], &option))
goto bad_val;
- pconfig->uid = option;
+ pconfig->uid = make_kuid(current_user_ns(), option);
+ if (!uid_valid(pconfig->uid))
+ goto bad_val;
break;
case Opt_gid:
if (match_int(&args[0], &option))
goto bad_val;
- pconfig->gid = option;
+ pconfig->gid = make_kgid(current_user_ns(), option);
+ if (!gid_valid(pconfig->gid))
+ goto bad_val;
break;
case Opt_mode:
@@ -924,7 +928,9 @@ static struct vfsmount *hugetlbfs_vfsmount;
static int can_do_hugetlb_shm(void)
{
- return capable(CAP_IPC_LOCK) || in_group_p(sysctl_hugetlb_shm_group);
+ kgid_t shm_group;
+ shm_group = make_kgid(&init_user_ns, sysctl_hugetlb_shm_group);
+ return capable(CAP_IPC_LOCK) || in_group_p(shm_group);
}
struct file *hugetlb_file_setup(const char *name, unsigned long addr,
diff --git a/init/Kconfig b/init/Kconfig
index 96007af..7ee6e19 100644
--- a/init/Kconfig
+++ b/init/Kconfig
@@ -954,7 +954,6 @@ config UIDGID_CONVERTED
depends on HFS_FS = n
depends on HFSPLUS_FS = n
depends on HPFS_FS = n
- depends on HUGETLBFS = n
depends on ISO9660_FS = n
depends on JFFS2_FS = n
depends on JFS_FS = n
--
1.7.5.4
next prev parent reply other threads:[~2012-09-20 11:42 UTC|newest]
Thread overview: 39+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-09-20 11:40 [REVIEW][PATCH 00/25] userns: Trivial filesystem conversions Eric W. Biederman
2012-09-20 11:41 ` [PATCH 01/25] userns: Convert fat to use kuid/kgid where appropriate Eric W. Biederman
2012-09-20 11:41 ` [PATCH 02/25] userns: Convert gadgetfs to use kuid and kgid " Eric W. Biederman
2012-09-20 11:58 ` Greg Kroah-Hartman
2012-09-21 9:33 ` Felipe Balbi
2012-09-20 11:41 ` [PATCH 03/25] userns: Convert usb functionfs to use kuid/kgid " Eric W. Biederman
2012-09-20 11:58 ` Greg Kroah-Hartman
2012-09-21 9:32 ` Felipe Balbi
2012-09-20 11:41 ` [PATCH 04/25] userns: Convert devtmpfs to use GLOBAL_ROOT_UID and GLOBAL_ROOT_GID Eric W. Biederman
2012-09-20 11:58 ` Greg Kroah-Hartman
2012-09-20 11:41 ` Eric W. Biederman [this message]
2012-09-20 11:41 ` [PATCH 06/25] userns: Convert xenfs to use kuid and kgid where appropriate Eric W. Biederman
2012-09-20 11:41 ` [PATCH 07/25] userns: Convert adfs " Eric W. Biederman
2012-09-20 11:41 ` [PATCH 08/25] userns: Convert befs to use kuid/kgid " Eric W. Biederman
2012-09-20 11:41 ` [PATCH 09/25] userns: Convert cramfs " Eric W. Biederman
2012-09-20 11:41 ` [PATCH 10/25] userns: Convert ecryptfs " Eric W. Biederman
2012-09-20 11:41 ` [PATCH 11/25] userns: Convert efs " Eric W. Biederman
2012-09-20 11:41 ` [PATCH 12/25] userns: Convert exofs " Eric W. Biederman
2012-09-20 12:20 ` Boaz Harrosh
2012-09-20 11:41 ` [PATCH 13/25] userns: Convert hfs to use kuid and kgid " Eric W. Biederman
2012-09-20 11:41 ` [PATCH 14/25] userns: Convert hfsplus " Eric W. Biederman
2012-09-20 11:41 ` [PATCH 15/25] userns: Convert isofs to use kuid/kgid " Eric W. Biederman
2012-09-20 11:41 ` [PATCH 16/25] userns: Convert logfs " Eric W. Biederman
2012-09-20 11:41 ` [PATCH 17/25] userns: Convert minix " Eric W. Biederman
2012-09-20 11:41 ` [PATCH 18/25] userns: Convert nillfs2 " Eric W. Biederman
2012-09-20 14:34 ` Ryusuke Konishi
2012-09-20 11:42 ` [PATCH 19/25] userns: Convert ntfs to use kuid and kgid " Eric W. Biederman
2012-09-20 11:42 ` [PATCH 20/25] userns: Convert omfs " Eric W. Biederman
2012-09-20 12:50 ` Bob Copeland
2012-09-20 13:13 ` Eric W. Biederman
2012-09-20 13:19 ` Bob Copeland
2012-09-20 11:42 ` [PATCH 21/25] userns: Convert the qnx4 filesystem to use kuid/kgid " Eric W. Biederman
2012-09-20 12:34 ` Anders Larsen
2012-09-20 11:42 ` [PATCH 22/25] userns: Convert the qnx6 " Eric W. Biederman
2012-09-20 11:42 ` [PATCH 25/25] userns: Convert ipathfs to use GLOBAL_ROOT_UID and GLOBAL_ROOT_GID Eric W. Biederman
2012-09-20 16:47 ` Marciniszyn, Mike
2012-09-20 11:55 ` [PATCH 01/25] userns: Convert fat to use kuid/kgid where appropriate OGAWA Hirofumi
2012-09-20 12:04 ` Eric W. Biederman
2012-09-20 12:28 ` OGAWA Hirofumi
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