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dm integrity: don't replay journal data past the end of the device 

Following commits will 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@redhat.com>
Signed-off-by: Mike Snitzer <snitzer@redhat.com>
alistair/sensors
Mikulas Patocka 2020-03-22 20:42:23 +01:00 committed by Mike Snitzer
parent 7649194a16
commit f6f72f32c2
1 changed files with 4 additions and 0 deletions
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4
drivers/md/dm-integrity.c
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@ -2194,6 +2194,8 @@ static void do_journal_write(struct dm_integrity_c *ic, unsigned write_start,
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++) {
@ -2203,6 +2205,8 @@ static void do_journal_write(struct dm_integrity_c *ic, unsigned write_start,
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;