diff options
Diffstat (limited to 'fs/xfs/libxfs/xfs_sb.c')
| -rw-r--r-- | fs/xfs/libxfs/xfs_sb.c | 35 |
1 files changed, 34 insertions, 1 deletions
diff --git a/fs/xfs/libxfs/xfs_sb.c b/fs/xfs/libxfs/xfs_sb.c index 05e7ed1b8022..ca1b3a7a9171 100644 --- a/fs/xfs/libxfs/xfs_sb.c +++ b/fs/xfs/libxfs/xfs_sb.c @@ -166,7 +166,40 @@ xfs_validate_sb_write( if (XFS_SB_VERSION_NUM(sbp) != XFS_SB_VERSION_5) return 0; - /* XXX: For write validation, we don't need to check feature masks?? */ + /* + * Version 5 superblock feature mask validation. Reject combinations + * the kernel cannot support since we checked for unsupported bits in + * the read verifier, which means that memory is corrupt. + */ + if (xfs_sb_has_compat_feature(sbp, XFS_SB_FEAT_COMPAT_UNKNOWN)) { + xfs_warn(mp, +"Corruption detected in superblock compatible features (0x%x)!", + (sbp->sb_features_compat & XFS_SB_FEAT_COMPAT_UNKNOWN)); + return -EFSCORRUPTED; + } + + if (xfs_sb_has_ro_compat_feature(sbp, XFS_SB_FEAT_RO_COMPAT_UNKNOWN)) { + xfs_alert(mp, +"Corruption detected in superblock read-only compatible features (0x%x)!", + (sbp->sb_features_ro_compat & + XFS_SB_FEAT_RO_COMPAT_UNKNOWN)); + return -EFSCORRUPTED; + } + if (xfs_sb_has_incompat_feature(sbp, XFS_SB_FEAT_INCOMPAT_UNKNOWN)) { + xfs_warn(mp, +"Corruption detected in superblock incompatible features (0x%x)!", + (sbp->sb_features_incompat & + XFS_SB_FEAT_INCOMPAT_UNKNOWN)); + return -EFSCORRUPTED; + } + if (xfs_sb_has_incompat_log_feature(sbp, + XFS_SB_FEAT_INCOMPAT_LOG_UNKNOWN)) { + xfs_warn(mp, +"Corruption detected in superblock incompatible log features (0x%x)!", + (sbp->sb_features_log_incompat & + XFS_SB_FEAT_INCOMPAT_LOG_UNKNOWN)); + return -EFSCORRUPTED; + } /* * We can't read verify the sb LSN because the read verifier is called |