From: "Serge E. Hallyn" <serge@hallyn.com>
To: "Eric W. Beiderman" <ebiederm@xmission.com>
Cc: linux-kernel@vger.kernel.org, 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>
Subject: Re: [PATCH 29/43] userns: Convert stat to return values mapped from kuids and kgids
Date: Wed, 18 Apr 2012 19:03:53 +0000 [thread overview]
Message-ID: <20120418190353.GG5186@mail.hallyn.com> (raw)
In-Reply-To: <1333862139-31737-29-git-send-email-ebiederm@xmission.com>
Quoting Eric W. Beiderman (ebiederm@xmission.com):
> From: Eric W. Biederman <ebiederm@xmission.com>
>
> - Store uids and gids with kuid_t and kgid_t in struct kstat
> - Convert uid and gids to userspace usable values with
> from_kuid and from_kgid
>
> Signed-off-by: Eric W. Biederman <ebiederm@xmission.com>
Acked-by: Serge Hallyn <serge.hallyn@canonical.com>
> ---
> arch/arm/kernel/sys_oabi-compat.c | 4 ++--
> arch/parisc/hpux/fs.c | 4 ++--
> arch/s390/kernel/compat_linux.c | 4 ++--
> arch/sparc/kernel/sys_sparc32.c | 4 ++--
> arch/x86/ia32/sys_ia32.c | 4 ++--
> fs/compat.c | 4 ++--
> fs/stat.c | 8 ++++----
> include/linux/stat.h | 5 +++--
> 8 files changed, 19 insertions(+), 18 deletions(-)
>
> diff --git a/arch/arm/kernel/sys_oabi-compat.c b/arch/arm/kernel/sys_oabi-compat.c
> index af0aaeb..3e94811 100644
> --- a/arch/arm/kernel/sys_oabi-compat.c
> +++ b/arch/arm/kernel/sys_oabi-compat.c
> @@ -124,8 +124,8 @@ static long cp_oldabi_stat64(struct kstat *stat,
> tmp.__st_ino = stat->ino;
> tmp.st_mode = stat->mode;
> tmp.st_nlink = stat->nlink;
> - tmp.st_uid = stat->uid;
> - tmp.st_gid = stat->gid;
> + tmp.st_uid = from_kuid_munged(current_user_ns(), stat->uid);
> + tmp.st_gid = from_kgid_munged(current_user_ns(), stat->gid);
> tmp.st_rdev = huge_encode_dev(stat->rdev);
> tmp.st_size = stat->size;
> tmp.st_blocks = stat->blocks;
> diff --git a/arch/parisc/hpux/fs.c b/arch/parisc/hpux/fs.c
> index 0dc8543..c71eb6c 100644
> --- a/arch/parisc/hpux/fs.c
> +++ b/arch/parisc/hpux/fs.c
> @@ -159,8 +159,8 @@ static int cp_hpux_stat(struct kstat *stat, struct hpux_stat64 __user *statbuf)
> tmp.st_ino = stat->ino;
> tmp.st_mode = stat->mode;
> tmp.st_nlink = stat->nlink;
> - tmp.st_uid = stat->uid;
> - tmp.st_gid = stat->gid;
> + tmp.st_uid = from_kuid_munged(current_user_ns(), stat->uid);
> + tmp.st_gid = from_kgid_munged(current_user_ns(), stat->gid);
> tmp.st_rdev = new_encode_dev(stat->rdev);
> tmp.st_size = stat->size;
> tmp.st_atime = stat->atime.tv_sec;
> diff --git a/arch/s390/kernel/compat_linux.c b/arch/s390/kernel/compat_linux.c
> index 5baac18..80ab23a 100644
> --- a/arch/s390/kernel/compat_linux.c
> +++ b/arch/s390/kernel/compat_linux.c
> @@ -546,8 +546,8 @@ static int cp_stat64(struct stat64_emu31 __user *ubuf, struct kstat *stat)
> tmp.__st_ino = (u32)stat->ino;
> tmp.st_mode = stat->mode;
> tmp.st_nlink = (unsigned int)stat->nlink;
> - tmp.st_uid = stat->uid;
> - tmp.st_gid = stat->gid;
> + tmp.st_uid = from_kuid_munged(current_user_ns(), stat->uid);
> + tmp.st_gid = from_kgid_munged(current_user_ns(), stat->gid);
> tmp.st_rdev = huge_encode_dev(stat->rdev);
> tmp.st_size = stat->size;
> tmp.st_blksize = (u32)stat->blksize;
> diff --git a/arch/sparc/kernel/sys_sparc32.c b/arch/sparc/kernel/sys_sparc32.c
> index 29c478f..f739233 100644
> --- a/arch/sparc/kernel/sys_sparc32.c
> +++ b/arch/sparc/kernel/sys_sparc32.c
> @@ -139,8 +139,8 @@ static int cp_compat_stat64(struct kstat *stat,
> err |= put_user(stat->ino, &statbuf->st_ino);
> err |= put_user(stat->mode, &statbuf->st_mode);
> err |= put_user(stat->nlink, &statbuf->st_nlink);
> - err |= put_user(stat->uid, &statbuf->st_uid);
> - err |= put_user(stat->gid, &statbuf->st_gid);
> + err |= put_user(from_kuid_munged(current_user_ns(), stat->uid), &statbuf->st_uid);
> + err |= put_user(from_kgid_munged(current_user_ns(), stat->gid), &statbuf->st_gid);
> err |= put_user(huge_encode_dev(stat->rdev), &statbuf->st_rdev);
> err |= put_user(0, (unsigned long __user *) &statbuf->__pad3[0]);
> err |= put_user(stat->size, &statbuf->st_size);
> diff --git a/arch/x86/ia32/sys_ia32.c b/arch/x86/ia32/sys_ia32.c
> index aec2202..d5c820a 100644
> --- a/arch/x86/ia32/sys_ia32.c
> +++ b/arch/x86/ia32/sys_ia32.c
> @@ -71,8 +71,8 @@ static int cp_stat64(struct stat64 __user *ubuf, struct kstat *stat)
> {
> typeof(ubuf->st_uid) uid = 0;
> typeof(ubuf->st_gid) gid = 0;
> - SET_UID(uid, stat->uid);
> - SET_GID(gid, stat->gid);
> + SET_UID(uid, from_kuid_munged(current_user_ns(), stat->uid));
> + SET_GID(gid, from_kgid_munged(current_user_ns(), stat->gid));
> if (!access_ok(VERIFY_WRITE, ubuf, sizeof(struct stat64)) ||
> __put_user(huge_encode_dev(stat->dev), &ubuf->st_dev) ||
> __put_user(stat->ino, &ubuf->__st_ino) ||
> diff --git a/fs/compat.c b/fs/compat.c
> index f2944ac..0781e61 100644
> --- a/fs/compat.c
> +++ b/fs/compat.c
> @@ -144,8 +144,8 @@ static int cp_compat_stat(struct kstat *stat, struct compat_stat __user *ubuf)
> tmp.st_nlink = stat->nlink;
> if (tmp.st_nlink != stat->nlink)
> return -EOVERFLOW;
> - SET_UID(tmp.st_uid, stat->uid);
> - SET_GID(tmp.st_gid, stat->gid);
> + SET_UID(tmp.st_uid, from_kuid_munged(current_user_ns(), stat->uid));
> + SET_GID(tmp.st_gid, from_kgid_munged(current_user_ns(), stat->gid));
> tmp.st_rdev = old_encode_dev(stat->rdev);
> if ((u64) stat->size > MAX_NON_LFS)
> return -EOVERFLOW;
> diff --git a/fs/stat.c b/fs/stat.c
> index c733dc5..fca17f9 100644
> --- a/fs/stat.c
> +++ b/fs/stat.c
> @@ -137,8 +137,8 @@ static int cp_old_stat(struct kstat *stat, struct __old_kernel_stat __user * sta
> tmp.st_nlink = stat->nlink;
> if (tmp.st_nlink != stat->nlink)
> return -EOVERFLOW;
> - SET_UID(tmp.st_uid, stat->uid);
> - SET_GID(tmp.st_gid, stat->gid);
> + SET_UID(tmp.st_uid, from_kuid_munged(current_user_ns(), stat->uid));
> + SET_GID(tmp.st_gid, from_kgid_munged(current_user_ns(), stat->gid));
> tmp.st_rdev = old_encode_dev(stat->rdev);
> #if BITS_PER_LONG == 32
> if (stat->size > MAX_NON_LFS)
> @@ -215,8 +215,8 @@ static int cp_new_stat(struct kstat *stat, struct stat __user *statbuf)
> tmp.st_nlink = stat->nlink;
> if (tmp.st_nlink != stat->nlink)
> return -EOVERFLOW;
> - SET_UID(tmp.st_uid, stat->uid);
> - SET_GID(tmp.st_gid, stat->gid);
> + SET_UID(tmp.st_uid, from_kuid_munged(current_user_ns(), stat->uid));
> + SET_GID(tmp.st_gid, from_kgid_munged(current_user_ns(), stat->gid));
> #if BITS_PER_LONG == 32
> tmp.st_rdev = old_encode_dev(stat->rdev);
> #else
> diff --git a/include/linux/stat.h b/include/linux/stat.h
> index 611c398..4613240 100644
> --- a/include/linux/stat.h
> +++ b/include/linux/stat.h
> @@ -58,14 +58,15 @@
>
> #include <linux/types.h>
> #include <linux/time.h>
> +#include <linux/uidgid.h>
>
> struct kstat {
> u64 ino;
> dev_t dev;
> umode_t mode;
> unsigned int nlink;
> - uid_t uid;
> - gid_t gid;
> + kuid_t uid;
> + kgid_t gid;
> dev_t rdev;
> loff_t size;
> struct timespec atime;
> --
> 1.7.2.5
>
> --
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next prev parent reply other threads:[~2012-04-18 19:02 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 [this message]
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 ` [PATCH 37/43] userns: Convert ext4 to user " "Eric W. Beiderman
2012-04-08 5:15 ` [PATCH 38/43] userns: Convert proc to use " "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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