diff options
| author | Dave Chinner <dchinner@redhat.com> | 2013-05-27 10:38:25 +0400 |
|---|---|---|
| committer | Ben Myers <bpm@sgi.com> | 2013-05-31 02:17:35 +0400 |
| commit | 2962f5a5dcc56f69cbf62121a7be67cc15d6940b (patch) | |
| tree | bd6e72c1c65e2e2c897e0e214528cf750c06ae27 | |
| parent | 08fb39051f5581df45ae2a20c6cf2d0c4cddf7c2 (diff) | |
| download | linux-2962f5a5dcc56f69cbf62121a7be67cc15d6940b.tar.xz | |
xfs: kill suid/sgid through the truncate path.
XFS has failed to kill suid/sgid bits correctly when truncating
files of non-zero size since commit c4ed4243 ("xfs: split
xfs_setattr") introduced in the 3.1 kernel. Fix it.
Fix it.
cc: stable kernel <stable@vger.kernel.org>
Signed-off-by: Dave Chinner <dchinner@redhat.com>
Reviewed-by: Brian Foster <bfoster@redhat.com>
Signed-off-by: Ben Myers <bpm@sgi.com>
(cherry picked from commit 56c19e89b38618390addfc743d822f99519055c6)
| -rw-r--r-- | fs/xfs/xfs_iops.c | 47 |
1 files changed, 32 insertions, 15 deletions
diff --git a/fs/xfs/xfs_iops.c b/fs/xfs/xfs_iops.c index d82efaa2ac73..ca9ecaa81112 100644 --- a/fs/xfs/xfs_iops.c +++ b/fs/xfs/xfs_iops.c @@ -455,6 +455,28 @@ xfs_vn_getattr( return 0; } +static void +xfs_setattr_mode( + struct xfs_trans *tp, + struct xfs_inode *ip, + struct iattr *iattr) +{ + struct inode *inode = VFS_I(ip); + umode_t mode = iattr->ia_mode; + + ASSERT(tp); + ASSERT(xfs_isilocked(ip, XFS_ILOCK_EXCL)); + + if (!in_group_p(inode->i_gid) && !capable(CAP_FSETID)) + mode &= ~S_ISGID; + + ip->i_d.di_mode &= S_IFMT; + ip->i_d.di_mode |= mode & ~S_IFMT; + + inode->i_mode &= S_IFMT; + inode->i_mode |= mode & ~S_IFMT; +} + int xfs_setattr_nonsize( struct xfs_inode *ip, @@ -606,18 +628,8 @@ xfs_setattr_nonsize( /* * Change file access modes. */ - if (mask & ATTR_MODE) { - umode_t mode = iattr->ia_mode; - - if (!in_group_p(inode->i_gid) && !capable(CAP_FSETID)) - mode &= ~S_ISGID; - - ip->i_d.di_mode &= S_IFMT; - ip->i_d.di_mode |= mode & ~S_IFMT; - - inode->i_mode &= S_IFMT; - inode->i_mode |= mode & ~S_IFMT; - } + if (mask & ATTR_MODE) + xfs_setattr_mode(tp, ip, iattr); /* * Change file access or modified times. @@ -714,9 +726,8 @@ xfs_setattr_size( return XFS_ERROR(error); ASSERT(S_ISREG(ip->i_d.di_mode)); - ASSERT((mask & (ATTR_MODE|ATTR_UID|ATTR_GID|ATTR_ATIME|ATTR_ATIME_SET| - ATTR_MTIME_SET|ATTR_KILL_SUID|ATTR_KILL_SGID| - ATTR_KILL_PRIV|ATTR_TIMES_SET)) == 0); + ASSERT((mask & (ATTR_UID|ATTR_GID|ATTR_ATIME|ATTR_ATIME_SET| + ATTR_MTIME_SET|ATTR_KILL_PRIV|ATTR_TIMES_SET)) == 0); if (!(flags & XFS_ATTR_NOLOCK)) { lock_flags |= XFS_IOLOCK_EXCL; @@ -860,6 +871,12 @@ xfs_setattr_size( xfs_inode_clear_eofblocks_tag(ip); } + /* + * Change file access modes. + */ + if (mask & ATTR_MODE) + xfs_setattr_mode(tp, ip, iattr); + if (mask & ATTR_CTIME) { inode->i_ctime = iattr->ia_ctime; ip->i_d.di_ctime.t_sec = iattr->ia_ctime.tv_sec; |