From: "\"Eric W. Beiderman" <ebiederm@xmission.com>
To: <linux-kernel@vger.kernel.org>
Cc: <linux-fsdevel@vger.kernel.org>,
<linux-security-module@vger.kernel.org>,
Linux Containers <containers@lists.linux-foundation.org>,
Andrew Morton <akpm@linux-foundation.org>,
Linus Torvalds <torvalds@linux-foundation.org>,
Al Viro <viro@ZenIV.linux.org.uk>,
Cyrill Gorcunov <gorcunov@openvz.org>,
"Eric W. Biederman" <ebiederm@xmission.com>
Subject: [PATCH 37/43] userns: Convert ext4 to user kuid/kgid where appropriate
Date: Sat, 7 Apr 2012 22:15:33 -0700 [thread overview]
Message-ID: <1333862139-31737-37-git-send-email-ebiederm@xmission.com> (raw)
In-Reply-To: <m11unyn70b.fsf@fess.ebiederm.org>
From: Eric W. Biederman <ebiederm@xmission.com>
Signed-off-by: Eric W. Biederman <ebiederm@xmission.com>
---
fs/ext4/balloc.c | 4 ++--
fs/ext4/ext4.h | 4 ++--
fs/ext4/ialloc.c | 4 ++--
fs/ext4/inode.c | 34 ++++++++++++++++++++--------------
fs/ext4/migrate.c | 4 ++--
fs/ext4/super.c | 38 ++++++++++++++++++++++++++------------
include/trace/events/ext4.h | 4 ++--
7 files changed, 56 insertions(+), 36 deletions(-)
diff --git a/fs/ext4/balloc.c b/fs/ext4/balloc.c
index 4bbd07a..c45c411 100644
--- a/fs/ext4/balloc.c
+++ b/fs/ext4/balloc.c
@@ -461,8 +461,8 @@ static int ext4_has_free_clusters(struct ext4_sb_info *sbi,
return 1;
/* Hm, nope. Are (enough) root reserved clusters available? */
- if (sbi->s_resuid == current_fsuid() ||
- ((sbi->s_resgid != 0) && in_group_p(sbi->s_resgid)) ||
+ if (uid_eq(sbi->s_resuid, current_fsuid()) ||
+ (!gid_eq(sbi->s_resgid, GLOBAL_ROOT_GID) && in_group_p(sbi->s_resgid)) ||
capable(CAP_SYS_RESOURCE) ||
(flags & EXT4_MB_USE_ROOT_BLOCKS)) {
diff --git a/fs/ext4/ext4.h b/fs/ext4/ext4.h
index ab2594a..0b4aeb2 100644
--- a/fs/ext4/ext4.h
+++ b/fs/ext4/ext4.h
@@ -1153,8 +1153,8 @@ struct ext4_sb_info {
unsigned int s_mount_flags;
unsigned int s_def_mount_opt;
ext4_fsblk_t s_sb_block;
- uid_t s_resuid;
- gid_t s_resgid;
+ kuid_t s_resuid;
+ kgid_t s_resgid;
unsigned short s_mount_state;
unsigned short s_pad;
int s_addr_per_block_bits;
diff --git a/fs/ext4/ialloc.c b/fs/ext4/ialloc.c
index 409c2ee..9f9acac 100644
--- a/fs/ext4/ialloc.c
+++ b/fs/ext4/ialloc.c
@@ -808,8 +808,8 @@ got:
}
if (owner) {
inode->i_mode = mode;
- inode->i_uid = owner[0];
- inode->i_gid = owner[1];
+ i_uid_write(inode, owner[0]);
+ i_gid_write(inode, owner[1]);
} else if (test_opt(sb, GRPID)) {
inode->i_mode = mode;
inode->i_uid = current_fsuid();
diff --git a/fs/ext4/inode.c b/fs/ext4/inode.c
index c77b0bd..07eaf56 100644
--- a/fs/ext4/inode.c
+++ b/fs/ext4/inode.c
@@ -3630,6 +3630,8 @@ struct inode *ext4_iget(struct super_block *sb, unsigned long ino)
journal_t *journal = EXT4_SB(sb)->s_journal;
long ret;
int block;
+ uid_t i_uid;
+ gid_t i_gid;
inode = iget_locked(sb, ino);
if (!inode)
@@ -3645,12 +3647,14 @@ struct inode *ext4_iget(struct super_block *sb, unsigned long ino)
goto bad_inode;
raw_inode = ext4_raw_inode(&iloc);
inode->i_mode = le16_to_cpu(raw_inode->i_mode);
- inode->i_uid = (uid_t)le16_to_cpu(raw_inode->i_uid_low);
- inode->i_gid = (gid_t)le16_to_cpu(raw_inode->i_gid_low);
+ i_uid = (uid_t)le16_to_cpu(raw_inode->i_uid_low);
+ i_gid = (gid_t)le16_to_cpu(raw_inode->i_gid_low);
if (!(test_opt(inode->i_sb, NO_UID32))) {
- inode->i_uid |= le16_to_cpu(raw_inode->i_uid_high) << 16;
- inode->i_gid |= le16_to_cpu(raw_inode->i_gid_high) << 16;
+ i_uid |= le16_to_cpu(raw_inode->i_uid_high) << 16;
+ i_gid |= le16_to_cpu(raw_inode->i_gid_high) << 16;
}
+ i_uid_write(inode, i_uid);
+ i_gid_write(inode, i_gid);
set_nlink(inode, le16_to_cpu(raw_inode->i_links_count));
ext4_clear_state_flags(ei); /* Only relevant on 32-bit archs */
@@ -3870,6 +3874,8 @@ static int ext4_do_update_inode(handle_t *handle,
struct ext4_inode_info *ei = EXT4_I(inode);
struct buffer_head *bh = iloc->bh;
int err = 0, rc, block;
+ uid_t i_uid;
+ gid_t i_gid;
/* For fields not not tracking in the in-memory inode,
* initialise them to zero for new inodes. */
@@ -3878,27 +3884,27 @@ static int ext4_do_update_inode(handle_t *handle,
ext4_get_inode_flags(ei);
raw_inode->i_mode = cpu_to_le16(inode->i_mode);
+ i_uid = i_uid_read(inode);
+ i_gid = i_gid_read(inode);
if (!(test_opt(inode->i_sb, NO_UID32))) {
- raw_inode->i_uid_low = cpu_to_le16(low_16_bits(inode->i_uid));
- raw_inode->i_gid_low = cpu_to_le16(low_16_bits(inode->i_gid));
+ raw_inode->i_uid_low = cpu_to_le16(low_16_bits(i_uid));
+ raw_inode->i_gid_low = cpu_to_le16(low_16_bits(i_gid));
/*
* Fix up interoperability with old kernels. Otherwise, old inodes get
* re-used with the upper 16 bits of the uid/gid intact
*/
if (!ei->i_dtime) {
raw_inode->i_uid_high =
- cpu_to_le16(high_16_bits(inode->i_uid));
+ cpu_to_le16(high_16_bits(i_uid));
raw_inode->i_gid_high =
- cpu_to_le16(high_16_bits(inode->i_gid));
+ cpu_to_le16(high_16_bits(i_gid));
} else {
raw_inode->i_uid_high = 0;
raw_inode->i_gid_high = 0;
}
} else {
- raw_inode->i_uid_low =
- cpu_to_le16(fs_high2lowuid(inode->i_uid));
- raw_inode->i_gid_low =
- cpu_to_le16(fs_high2lowgid(inode->i_gid));
+ raw_inode->i_uid_low = cpu_to_le16(fs_high2lowuid(i_uid));
+ raw_inode->i_gid_low = cpu_to_le16(fs_high2lowgid(i_gid));
raw_inode->i_uid_high = 0;
raw_inode->i_gid_high = 0;
}
@@ -4084,8 +4090,8 @@ int ext4_setattr(struct dentry *dentry, struct iattr *attr)
if (is_quota_modification(inode, attr))
dquot_initialize(inode);
- if ((ia_valid & ATTR_UID && attr->ia_uid != inode->i_uid) ||
- (ia_valid & ATTR_GID && attr->ia_gid != inode->i_gid)) {
+ if ((ia_valid & ATTR_UID && !uid_eq(attr->ia_uid, inode->i_uid)) ||
+ (ia_valid & ATTR_GID && !gid_eq(attr->ia_gid, inode->i_gid))) {
handle_t *handle;
/* (user+group)*(old+new) structure, inode write (sb,
diff --git a/fs/ext4/migrate.c b/fs/ext4/migrate.c
index f39f80f..f1bb32e 100644
--- a/fs/ext4/migrate.c
+++ b/fs/ext4/migrate.c
@@ -466,8 +466,8 @@ int ext4_ext_migrate(struct inode *inode)
}
goal = (((inode->i_ino - 1) / EXT4_INODES_PER_GROUP(inode->i_sb)) *
EXT4_INODES_PER_GROUP(inode->i_sb)) + 1;
- owner[0] = inode->i_uid;
- owner[1] = inode->i_gid;
+ owner[0] = i_uid_read(inode);
+ owner[1] = i_gid_read(inode);
tmp_inode = ext4_new_inode(handle, inode->i_sb->s_root->d_inode,
S_IFREG, NULL, goal, owner);
if (IS_ERR(tmp_inode)) {
diff --git a/fs/ext4/super.c b/fs/ext4/super.c
index ceebaf8..9d8eba0 100644
--- a/fs/ext4/super.c
+++ b/fs/ext4/super.c
@@ -1448,6 +1448,8 @@ static int handle_mount_opt(struct super_block *sb, char *opt, int token,
{
struct ext4_sb_info *sbi = EXT4_SB(sb);
const struct mount_opts *m;
+ kuid_t uid;
+ kgid_t gid;
int arg = 0;
if (args->from && match_int(args, &arg))
@@ -1464,10 +1466,20 @@ static int handle_mount_opt(struct super_block *sb, char *opt, int token,
"Ignoring removed %s option", opt);
return 1;
case Opt_resuid:
- sbi->s_resuid = arg;
+ uid = make_kuid(current_user_ns(), arg);
+ if (!uid_valid(uid)) {
+ ext4_msg(sb, KERN_ERR, "Invalid uid value %d", arg);
+ return -1;
+ }
+ sbi->s_resuid = uid;
return 1;
case Opt_resgid:
- sbi->s_resgid = arg;
+ gid = make_kgid(current_user_ns(), arg);
+ if (!gid_valid(gid)) {
+ ext4_msg(sb, KERN_ERR, "Invalid gid value %d", arg);
+ return -1;
+ }
+ sbi->s_resgid = gid;
return 1;
case Opt_abort:
sbi->s_mount_flags |= EXT4_MF_FS_ABORTED;
@@ -1732,12 +1744,14 @@ static int _ext4_show_options(struct seq_file *seq, struct super_block *sb,
SEQ_OPTS_PRINT("%s", token2str(m->token));
}
- if (nodefs || sbi->s_resuid != EXT4_DEF_RESUID ||
+ if (nodefs || !uid_eq(sbi->s_resuid, make_kuid(&init_user_ns, EXT4_DEF_RESUID)) ||
le16_to_cpu(es->s_def_resuid) != EXT4_DEF_RESUID)
- SEQ_OPTS_PRINT("resuid=%u", sbi->s_resuid);
- if (nodefs || sbi->s_resgid != EXT4_DEF_RESGID ||
+ SEQ_OPTS_PRINT("resuid=%u",
+ from_kuid_munged(&init_user_ns, sbi->s_resuid));
+ if (nodefs || !gid_eq(sbi->s_resgid, make_kgid(&init_user_ns, EXT4_DEF_RESGID)) ||
le16_to_cpu(es->s_def_resgid) != EXT4_DEF_RESGID)
- SEQ_OPTS_PRINT("resgid=%u", sbi->s_resgid);
+ SEQ_OPTS_PRINT("resgid=%u",
+ from_kgid_munged(&init_user_ns, sbi->s_resgid));
def_errors = nodefs ? -1 : le16_to_cpu(es->s_errors);
if (test_opt(sb, ERRORS_RO) && def_errors != EXT4_ERRORS_RO)
SEQ_OPTS_PUTS("errors=remount-ro");
@@ -2996,8 +3010,8 @@ static int ext4_fill_super(struct super_block *sb, void *data, int silent)
}
sb->s_fs_info = sbi;
sbi->s_mount_opt = 0;
- sbi->s_resuid = EXT4_DEF_RESUID;
- sbi->s_resgid = EXT4_DEF_RESGID;
+ sbi->s_resuid = make_kuid(&init_user_ns, EXT4_DEF_RESUID);
+ sbi->s_resgid = make_kgid(&init_user_ns, EXT4_DEF_RESGID);
sbi->s_inode_readahead_blks = EXT4_DEF_INODE_READAHEAD_BLKS;
sbi->s_sb_block = sb_block;
if (sb->s_bdev->bd_part)
@@ -3076,8 +3090,8 @@ static int ext4_fill_super(struct super_block *sb, void *data, int silent)
if (def_mount_opts & EXT4_DEFM_DISCARD)
set_opt(sb, DISCARD);
- sbi->s_resuid = le16_to_cpu(es->s_def_resuid);
- sbi->s_resgid = le16_to_cpu(es->s_def_resgid);
+ sbi->s_resuid = make_kuid(&init_user_ns, le16_to_cpu(es->s_def_resuid));
+ sbi->s_resgid = make_kgid(&init_user_ns, le16_to_cpu(es->s_def_resgid));
sbi->s_commit_interval = JBD2_DEFAULT_MAX_COMMIT_AGE * HZ;
sbi->s_min_batch_time = EXT4_DEF_MIN_BATCH_TIME;
sbi->s_max_batch_time = EXT4_DEF_MAX_BATCH_TIME;
@@ -4229,8 +4243,8 @@ static int ext4_unfreeze(struct super_block *sb)
struct ext4_mount_options {
unsigned long s_mount_opt;
unsigned long s_mount_opt2;
- uid_t s_resuid;
- gid_t s_resgid;
+ kuid_t s_resuid;
+ kgid_t s_resgid;
unsigned long s_commit_interval;
u32 s_min_batch_time, s_max_batch_time;
#ifdef CONFIG_QUOTA
diff --git a/include/trace/events/ext4.h b/include/trace/events/ext4.h
index 319538b..69d8a69 100644
--- a/include/trace/events/ext4.h
+++ b/include/trace/events/ext4.h
@@ -36,8 +36,8 @@ TRACE_EVENT(ext4_free_inode,
__entry->dev = inode->i_sb->s_dev;
__entry->ino = inode->i_ino;
__entry->mode = inode->i_mode;
- __entry->uid = inode->i_uid;
- __entry->gid = inode->i_gid;
+ __entry->uid = i_uid_read(inode);
+ __entry->gid = i_gid_read(inode);
__entry->blocks = inode->i_blocks;
),
--
1.7.2.5
next prev parent reply other threads:[~2012-04-08 5:13 UTC|newest]
Thread overview: 89+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-04-08 5:10 [REVIEW][PATCH 0/43] Completing the user namespace Eric W. Biederman
2012-04-08 5:14 ` [PATCH 01/43] vfs: Don't allow a user namespace root to make device nodes "Eric W. Beiderman
2012-04-08 5:14 ` [PATCH 02/43] userns: Kill bogus declaration of function release_uids "Eric W. Beiderman
2012-04-08 5:14 ` [PATCH 03/43] userns: Replace netlink uses of cap_raised with capable "Eric W. Beiderman
2012-04-08 5:15 ` [PATCH 04/43] userns: Remove unnecessary cast to struct user_struct when copying cred->user "Eric W. Beiderman
2012-04-08 5:15 ` [PATCH 05/43] cred: Add forward declaration of init_user_ns in all cases "Eric W. Beiderman
2012-04-08 5:15 ` [PATCH 06/43] userns: Use cred->user_ns instead of cred->user->user_ns "Eric W. Beiderman
2012-04-08 5:15 ` [PATCH 07/43] cred: Refcount the user_ns pointed to by the cred "Eric W. Beiderman
2012-04-08 5:15 ` [PATCH 08/43] userns: Add an explicit reference to the parent user namespace "Eric W. Beiderman
2012-04-08 5:15 ` [PATCH 09/43] mqueue: Explicitly capture the user namespace to send the notification to "Eric W. Beiderman
2012-04-08 5:15 ` [PATCH 10/43] userns: Deprecate and rename the user_namespace reference in the user_struct "Eric W. Beiderman
2012-04-08 5:15 ` [PATCH 11/43] userns: Start out with a full set of capabilities "Eric W. Beiderman
2012-04-08 5:15 ` [PATCH 12/43] userns: Replace the hard to write inode_userns with inode_capable "Eric W. Beiderman
2012-04-08 5:15 ` [PATCH 13/43] userns: Add kuid_t and kgid_t and associated infrastructure in uidgid.h "Eric W. Beiderman
2012-04-08 5:15 ` [PATCH 14/43] userns: Add a Kconfig option to enforce strict kuid and kgid type checks "Eric W. Beiderman
2012-04-08 5:15 ` [PATCH 15/43] userns: Disassociate user_struct from the user_namespace "Eric W. Beiderman
2012-04-08 5:15 ` [PATCH 16/43] userns: Simplify the user_namespace by making userns->creator a kuid "Eric W. Beiderman
2012-04-18 18:48 ` Serge E. Hallyn
2012-04-20 22:58 ` Eric W. Biederman
2012-04-24 17:33 ` Serge E. Hallyn
2012-04-24 19:41 ` Eric W. Biederman
2012-04-24 20:23 ` Serge E. Hallyn
2012-04-26 9:09 ` Eric W. Biederman
2012-04-26 16:21 ` Serge E. Hallyn
2012-04-08 5:15 ` [PATCH 18/43] userns: Convert group_info values from gid_t to kgid_t "Eric W. Beiderman
2012-04-18 18:49 ` Serge E. Hallyn
2012-04-20 23:05 ` Eric W. Biederman
2012-04-08 5:15 ` [PATCH 19/43] userns: Store uid and gid values in struct cred with kuid_t and kgid_t types "Eric W. Beiderman
2012-04-18 18:49 ` Serge E. Hallyn
2012-04-08 5:15 ` [PATCH 20/43] userns: Replace user_ns_map_uid and user_ns_map_gid with from_kuid and from_kgid "Eric W. Beiderman
2012-04-18 18:49 ` Serge E. Hallyn
2012-04-08 5:15 ` [PATCH 21/43] userns: Convert sched_set_affinity and sched_set_scheduler's permission checks "Eric W. Beiderman
2012-04-18 18:50 ` Serge E. Hallyn
2012-04-08 5:15 ` [PATCH 22/43] userns: Convert capabilities related permsion checks "Eric W. Beiderman
2012-04-18 18:51 ` Serge E. Hallyn
2012-04-20 23:18 ` Eric W. Biederman
2012-04-08 5:15 ` [PATCH 23/43] userns: Convert setting and getting uid and gid system calls to use kuid and kgid "Eric W. Beiderman
2012-04-26 16:20 ` Serge E. Hallyn
2012-04-08 5:15 ` [PATCH 24/43] userns: Convert ptrace, kill, set_priority permission checks to work with kuids and kgids "Eric W. Beiderman
2012-04-18 18:56 ` Serge E. Hallyn
2012-04-20 23:51 ` Eric W. Biederman
2012-04-08 5:15 ` [PATCH 25/43] userns: Store uid and gid types in vfs structures with kuid_t and kgid_t types "Eric W. Beiderman
2012-04-18 18:57 ` Serge E. Hallyn
2012-04-08 5:15 ` [PATCH 26/43] userns: Convert in_group_p and in_egroup_p to use kgid_t "Eric W. Beiderman
2012-04-18 18:58 ` Serge E. Hallyn
2012-04-08 5:15 ` [PATCH 27/43] userns: Use uid_eq gid_eq helpers when comparing kuids and kgids in the vfs "Eric W. Beiderman
2012-04-18 19:02 ` Serge E. Hallyn
2012-04-21 0:05 ` Eric W. Biederman
2012-04-18 19:03 ` Serge E. Hallyn
2012-04-21 0:58 ` Eric W. Biederman
2012-04-24 17:41 ` Serge E. Hallyn
2012-04-26 0:11 ` Serge E. Hallyn
2012-04-26 5:33 ` Eric W. Biederman
2012-04-08 5:15 ` [PATCH 28/43] userns: Convert user specfied uids and gids in chown into kuids and kgid "Eric W. Beiderman
2012-04-18 19:03 ` Serge E. Hallyn
2012-04-08 5:15 ` [PATCH 29/43] userns: Convert stat to return values mapped from kuids and kgids "Eric W. Beiderman
2012-04-18 19:03 ` Serge E. Hallyn
2012-04-08 5:15 ` [PATCH 30/43] userns: Fail exec for suid and sgid binaries with ids outside our user namespace "Eric W. Beiderman
2012-04-18 19:05 ` Serge E. Hallyn
2012-04-18 19:09 ` Serge E. Hallyn
2012-04-24 2:28 ` Eric W. Biederman
2012-04-24 15:10 ` Serge Hallyn
2012-04-08 5:15 ` [PATCH 31/43] userns: Teach inode_capable to understand inodes whose uids map to other namespaces "Eric W. Beiderman
2012-04-18 19:06 ` Serge E. Hallyn
2012-04-08 5:15 ` [PATCH 32/43] userns: signal remove unnecessary map_cred_ns "Eric W. Beiderman
2012-04-18 19:07 ` Serge E. Hallyn
2012-04-08 5:15 ` [PATCH 33/43] userns: Convert binary formats to use kuid/kgid where appropriate "Eric W. Beiderman
2012-04-18 19:10 ` Serge E. Hallyn
2012-04-24 2:44 ` Eric W. Biederman
2012-04-08 5:15 ` [PATCH 34/43] userns: Convert devpts " "Eric W. Beiderman
2012-04-08 5:15 ` [PATCH 35/43] userns: Convert ext2 " "Eric W. Beiderman
2012-04-08 5:15 ` [PATCH 36/43] userns: Convert ext3 " "Eric W. Beiderman
2012-04-08 5:15 ` "Eric W. Beiderman [this message]
2012-04-08 5:15 ` [PATCH 38/43] userns: Convert proc " "Eric W. Beiderman
2012-04-08 5:15 ` [PATCH 39/43] userns: Convert sysctl permission checks to use kuid and kgids "Eric W. Beiderman
2012-04-08 5:15 ` [PATCH 40/43] userns: Convert sysfs to use kgid/kuid where appropriate "Eric W. Beiderman
2012-04-08 5:15 ` [PATCH 41/43] userns: Convert tmpfs to use kuid and kgid " "Eric W. Beiderman
2012-04-08 5:15 ` [PATCH 42/43] userns: Convert cgroup permission checks to use uid_eq "Eric W. Beiderman
2012-04-08 5:15 ` [PATCH 43/43] userns: Convert the move_pages, and migrate_pages " "Eric W. Beiderman
2012-04-08 14:54 ` [REVIEW][PATCH 0/43] Completing the user namespace Serge Hallyn
2012-04-08 17:40 ` richard -rw- weinberger
2012-04-08 21:30 ` Eric W. Biederman
2012-04-08 22:04 ` richard -rw- weinberger
2012-04-08 22:52 ` Eric W. Biederman
[not found] ` <1333862139-31737-17-git-send-email-ebiederm@xmission.com>
2012-04-18 18:49 ` [PATCH 17/43] userns: Rework the user_namespace adding uid/gid mapping support Serge E. Hallyn
2012-05-11 23:20 ` Please include user-namespace.git in linux-next Eric W. Biederman
2012-05-13 23:35 ` Stephen Rothwell
2012-05-21 2:25 ` Tetsuo Handa
2012-05-22 17:26 ` Eric W. Biederman
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