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authorAndy Lutomirski <luto@amacapital.net>2014-06-10 23:45:42 +0400
committerLinus Torvalds <torvalds@linux-foundation.org>2014-06-11 00:57:22 +0400
commit23adbe12ef7d3d4195e80800ab36b37bee28cd03 (patch)
tree000f8f8b3172aa6629b7c9a4148a96549a07acb6 /fs/xfs
parent5b174fd6472b1d6b6402b30210a212f3fd770d96 (diff)
downloadlinux-23adbe12ef7d3d4195e80800ab36b37bee28cd03.tar.xz
fs,userns: Change inode_capable to capable_wrt_inode_uidgid
The kernel has no concept of capabilities with respect to inodes; inodes exist independently of namespaces. For example, inode_capable(inode, CAP_LINUX_IMMUTABLE) would be nonsense. This patch changes inode_capable to check for uid and gid mappings and renames it to capable_wrt_inode_uidgid, which should make it more obvious what it does. Fixes CVE-2014-4014. Cc: Theodore Ts'o <tytso@mit.edu> Cc: Serge Hallyn <serge.hallyn@ubuntu.com> Cc: "Eric W. Biederman" <ebiederm@xmission.com> Cc: Dave Chinner <david@fromorbit.com> Cc: stable@vger.kernel.org Signed-off-by: Andy Lutomirski <luto@amacapital.net> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'fs/xfs')
-rw-r--r--fs/xfs/xfs_ioctl.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/fs/xfs/xfs_ioctl.c b/fs/xfs/xfs_ioctl.c
index 0b18776b075e..6152cbe353e8 100644
--- a/fs/xfs/xfs_ioctl.c
+++ b/fs/xfs/xfs_ioctl.c
@@ -1215,7 +1215,7 @@ xfs_ioctl_setattr(
* cleared upon successful return from chown()
*/
if ((ip->i_d.di_mode & (S_ISUID|S_ISGID)) &&
- !inode_capable(VFS_I(ip), CAP_FSETID))
+ !capable_wrt_inode_uidgid(VFS_I(ip), CAP_FSETID))
ip->i_d.di_mode &= ~(S_ISUID|S_ISGID);
/*