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-rw-r--r--drivers/md/md.c12
1 files changed, 10 insertions, 2 deletions
diff --git a/drivers/md/md.c b/drivers/md/md.c
index 3742ce8b0acf..5404b2295820 100644
--- a/drivers/md/md.c
+++ b/drivers/md/md.c
@@ -1138,8 +1138,11 @@ static int super_90_load(mdk_rdev_t *rdev, mdk_rdev_t *refdev, int minor_version
1138 ret = 0; 1138 ret = 0;
1139 } 1139 }
1140 rdev->sectors = rdev->sb_start; 1140 rdev->sectors = rdev->sb_start;
1141 /* Limit to 4TB as metadata cannot record more than that */
1142 if (rdev->sectors >= (2ULL << 32))
1143 rdev->sectors = (2ULL << 32) - 2;
1141 1144
1142 if (rdev->sectors < sb->size * 2 && sb->level > 1) 1145 if (rdev->sectors < ((sector_t)sb->size) * 2 && sb->level >= 1)
1143 /* "this cannot possibly happen" ... */ 1146 /* "this cannot possibly happen" ... */
1144 ret = -EINVAL; 1147 ret = -EINVAL;
1145 1148
@@ -1173,7 +1176,7 @@ static int super_90_validate(mddev_t *mddev, mdk_rdev_t *rdev)
1173 mddev->clevel[0] = 0; 1176 mddev->clevel[0] = 0;
1174 mddev->layout = sb->layout; 1177 mddev->layout = sb->layout;
1175 mddev->raid_disks = sb->raid_disks; 1178 mddev->raid_disks = sb->raid_disks;
1176 mddev->dev_sectors = sb->size * 2; 1179 mddev->dev_sectors = ((sector_t)sb->size) * 2;
1177 mddev->events = ev1; 1180 mddev->events = ev1;
1178 mddev->bitmap_info.offset = 0; 1181 mddev->bitmap_info.offset = 0;
1179 mddev->bitmap_info.default_offset = MD_SB_BYTES >> 9; 1182 mddev->bitmap_info.default_offset = MD_SB_BYTES >> 9;
@@ -1415,6 +1418,11 @@ super_90_rdev_size_change(mdk_rdev_t *rdev, sector_t num_sectors)
1415 rdev->sb_start = calc_dev_sboffset(rdev); 1418 rdev->sb_start = calc_dev_sboffset(rdev);
1416 if (!num_sectors || num_sectors > rdev->sb_start) 1419 if (!num_sectors || num_sectors > rdev->sb_start)
1417 num_sectors = rdev->sb_start; 1420 num_sectors = rdev->sb_start;
1421 /* Limit to 4TB as metadata cannot record more than that.
1422 * 4TB == 2^32 KB, or 2*2^32 sectors.
1423 */
1424 if (num_sectors >= (2ULL << 32))
1425 num_sectors = (2ULL << 32) - 2;
1418 md_super_write(rdev->mddev, rdev, rdev->sb_start, rdev->sb_size, 1426 md_super_write(rdev->mddev, rdev, rdev->sb_start, rdev->sb_size,
1419 rdev->sb_page); 1427 rdev->sb_page);
1420 md_super_wait(rdev->mddev); 1428 md_super_wait(rdev->mddev);