[XFS] Fix signedness issues in dquot ID handling, allowing uids/gids above

MAXINT

SGI-PV: 942528
SGI-Modid: xfs-linux:xfs-kern:23828a

Signed-off-by: Nathan Scott <nathans@sgi.com>

2 files changed, 3 insertions, 9 deletions

diff --git a/fs/xfs/quota/xfs_dquot.c b/fs/xfs/quota/xfs_dquot.c
index e2e8d35fa4d0..9987977a4927 100644
--- a/fs/xfs/quota/xfs_dquot.c
+++ b/fs/xfs/quota/xfs_dquot.c
@@ -563,8 +563,7 @@ xfs_qm_dqtobp(
          */
         if (dqp->q_blkno == (xfs_daddr_t) 0) {
                 /* We use the id as an index */
-                dqp->q_fileoffset = (xfs_fileoff_t) ((uint)id /
-                                                     XFS_QM_DQPERBLK(mp));
+                dqp->q_fileoffset = (xfs_fileoff_t)id / XFS_QM_DQPERBLK(mp);
                 nmaps = 1;
                 quotip = XFS_DQ_TO_QIP(dqp);
                 xfs_ilock(quotip, XFS_ILOCK_SHARED);
diff --git a/fs/xfs/quota/xfs_qm_syscalls.c b/fs/xfs/quota/xfs_qm_syscalls.c
index 15e02e8a9d4f..4e397940b3a6 100644
--- a/fs/xfs/quota/xfs_qm_syscalls.c
+++ b/fs/xfs/quota/xfs_qm_syscalls.c
@@ -109,10 +109,7 @@ xfs_qm_quotactl(
         vfsp = bhvtovfs(bdp);
         mp = XFS_VFSTOM(vfsp);
 
-        if (addr == NULL && cmd != Q_SYNC)
-                return XFS_ERROR(EINVAL);
-        if (id < 0 && cmd != Q_SYNC)
-                return XFS_ERROR(EINVAL);
+        ASSERT(addr != NULL);
 
         /*
          * The following commands are valid even when quotaoff.
@@ -122,7 +119,7 @@ xfs_qm_quotactl(
                 /*
                  * Truncate quota files. quota must be off.
                  */
-                if (XFS_IS_QUOTA_ON(mp) || addr == NULL)
+                if (XFS_IS_QUOTA_ON(mp))
                         return XFS_ERROR(EINVAL);
                 if (vfsp->vfs_flag & VFS_RDONLY)
                         return XFS_ERROR(EROFS);
@@ -140,8 +137,6 @@ xfs_qm_quotactl(
                  * QUOTAON - enabling quota enforcement.
                  * Quota accounting must be turned on at mount time.
                  */
-                if (addr == NULL)
-                        return XFS_ERROR(EINVAL);
                 if (vfsp->vfs_flag & VFS_RDONLY)
                         return XFS_ERROR(EROFS);
                 return (xfs_qm_scall_quotaon(mp,