The following patches make it possible to shrink or extend the device. If
the device was shrunk, we don't want to replay journal data pointing past
the end of the device.
Signed-off-by: Mikulas Patocka <mpatocka@xxxxxxxxxx>
---
drivers/md/dm-integrity.c | 4 ++++
1 file changed, 4 insertions(+)
Index: linux-2.6/drivers/md/dm-integrity.c
===================================================================
--- linux-2.6.orig/drivers/md/dm-integrity.c 2020-03-09 15:44:41.000000000 +0100
+++ linux-2.6/drivers/md/dm-integrity.c 2020-03-09 15:44:41.000000000 +0100
@@ -2193,6 +2193,8 @@ static void do_journal_write(struct dm_i
sec &= ~(sector_t)(ic->sectors_per_block - 1);
}
}
+ if (unlikely(sec >= ic->provided_data_sectors))
+ continue;
get_area_and_offset(ic, sec, &area, &offset);
restore_last_bytes(ic, access_journal_data(ic, i, j), je);
for (k = j + 1; k < ic->journal_section_entries; k++) {
@@ -2202,6 +2204,8 @@ static void do_journal_write(struct dm_i
break;
BUG_ON(unlikely(journal_entry_is_inprogress(je2)) && !from_replay);
sec2 = journal_entry_get_sector(je2);
+ if (unlikely(sec2 >= ic->provided_data_sectors))
+ break;
get_area_and_offset(ic, sec2, &area2, &offset2);
if (area2 != area || offset2 != offset + ((k - j) << ic->sb->log2_sectors_per_block))
break;
--
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