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| author | Carlos Maiolino <cmaiolino@redhat.com> | 2013-06-21 19:45:53 +0200 |
|---|---|---|
| committer | Ben Myers <bpm@sgi.com> | 2013-07-10 17:21:51 +0200 |
| commit | 42c49d7f249c2487f36d3314753d5d8ebcee8249 (patch) | |
| tree | 6c0863677aa03d43d5a5c3e8cb5a53c4b1653b08 /fs | |
| parent | xfs: dquot log reservations are too small (diff) | |
| download | linux-42c49d7f249c2487f36d3314753d5d8ebcee8249.tar.xz linux-42c49d7f249c2487f36d3314753d5d8ebcee8249.zip | |
xfs: fix sgid inheritance for subdirectories inheriting default acls [V3]
XFS removes sgid bits of subdirectories under a directory containing a default
acl.
When a default acl is set, it implies xfs to call xfs_setattr_nonsize() in its
code path. Such function is shared among mkdir and chmod system calls, and
does some checks unneeded by mkdir (calling inode_change_ok()). Such checks
remove sgid bit from the inode after it has been granted.
With this patch, we extend the meaning of XFS_ATTR_NOACL flag to avoid these
checks when acls are being inherited (thanks hch).
Also, xfs_setattr_mode, doesn't need to re-check for group id and capabilities
permissions, this only implies in another try to remove sgid bit from the
directories. Such check is already done either on inode_change_ok() or
xfs_setattr_nonsize().
Changelog:
V2: Extends the meaning of XFS_ATTR_NOACL instead of wrap the tests into another
function
V3: Remove S_ISDIR check in xfs_setattr_nonsize() from the patch
Signed-off-by: Carlos Maiolino <cmaiolino@redhat.com>
Reviewed-by: Ben Myers <bpm@sgi.com>
Signed-off-by: Ben Myers <bpm@sgi.com>
Diffstat (limited to 'fs')
| -rw-r--r-- | fs/xfs/xfs_iops.c | 20 |
1 files changed, 10 insertions, 10 deletions
diff --git a/fs/xfs/xfs_iops.c b/fs/xfs/xfs_iops.c index c69bbc493cb0..8865261e5417 100644 --- a/fs/xfs/xfs_iops.c +++ b/fs/xfs/xfs_iops.c @@ -467,9 +467,6 @@ xfs_setattr_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; @@ -495,15 +492,18 @@ xfs_setattr_nonsize( trace_xfs_setattr(ip); - if (mp->m_flags & XFS_MOUNT_RDONLY) - return XFS_ERROR(EROFS); + /* If acls are being inherited, we already have this checked */ + if (!(flags & XFS_ATTR_NOACL)) { + if (mp->m_flags & XFS_MOUNT_RDONLY) + return XFS_ERROR(EROFS); - if (XFS_FORCED_SHUTDOWN(mp)) - return XFS_ERROR(EIO); + if (XFS_FORCED_SHUTDOWN(mp)) + return XFS_ERROR(EIO); - error = -inode_change_ok(inode, iattr); - if (error) - return XFS_ERROR(error); + error = -inode_change_ok(inode, iattr); + if (error) + return XFS_ERROR(error); + } ASSERT((mask & ATTR_SIZE) == 0); |