[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]
[PULL 31/32] qcow2-refcount: check_refblocks(): add separate message for
From: |
Hanna Reitz |
Subject: |
[PULL 31/32] qcow2-refcount: check_refblocks(): add separate message for reserved |
Date: |
Wed, 15 Sep 2021 19:53:17 +0200 |
From: Vladimir Sementsov-Ogievskiy <vsementsov@virtuozzo.com>
Split checking for reserved bits out of aligned offset check.
Signed-off-by: Vladimir Sementsov-Ogievskiy <vsementsov@virtuozzo.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
Tested-by: Kirill Tkhai <ktkhai@virtuozzo.com>
Reviewed-by: Hanna Reitz <hreitz@redhat.com>
Message-Id: <20210914122454.141075-11-vsementsov@virtuozzo.com>
Signed-off-by: Hanna Reitz <hreitz@redhat.com>
---
block/qcow2.h | 1 +
block/qcow2-refcount.c | 10 +++++++++-
2 files changed, 10 insertions(+), 1 deletion(-)
diff --git a/block/qcow2.h b/block/qcow2.h
index 58fd7f1678..fd48a89d45 100644
--- a/block/qcow2.h
+++ b/block/qcow2.h
@@ -591,6 +591,7 @@ typedef enum QCow2MetadataOverlap {
#define L2E_STD_RESERVED_MASK 0x3f000000000001feULL
#define REFT_OFFSET_MASK 0xfffffffffffffe00ULL
+#define REFT_RESERVED_MASK 0x1ffULL
#define INV_OFFSET (-1ULL)
diff --git a/block/qcow2-refcount.c b/block/qcow2-refcount.c
index 1c246b9227..4614572252 100644
--- a/block/qcow2-refcount.c
+++ b/block/qcow2-refcount.c
@@ -2089,9 +2089,17 @@ static int check_refblocks(BlockDriverState *bs,
BdrvCheckResult *res,
for(i = 0; i < s->refcount_table_size; i++) {
uint64_t offset, cluster;
- offset = s->refcount_table[i];
+ offset = s->refcount_table[i] & REFT_OFFSET_MASK;
cluster = offset >> s->cluster_bits;
+ if (s->refcount_table[i] & REFT_RESERVED_MASK) {
+ fprintf(stderr, "ERROR refcount table entry %" PRId64 " has "
+ "reserved bits set\n", i);
+ res->corruptions++;
+ *rebuild = true;
+ continue;
+ }
+
/* Refcount blocks are cluster aligned */
if (offset_into_cluster(s, offset)) {
fprintf(stderr, "ERROR refcount block %" PRId64 " is not "
--
2.31.1
- [PULL 20/32] qcow2: handle_dependencies(): relax conflict detection, (continued)
- [PULL 20/32] qcow2: handle_dependencies(): relax conflict detection, Hanna Reitz, 2021/09/15
- [PULL 22/32] qcow2-refcount: improve style of check_refcounts_l2(), Hanna Reitz, 2021/09/15
- [PULL 23/32] qcow2: compressed read: simplify cluster descriptor passing, Hanna Reitz, 2021/09/15
- [PULL 25/32] qcow2-refcount: introduce fix_l2_entry_by_zero(), Hanna Reitz, 2021/09/15
- [PULL 24/32] qcow2: introduce qcow2_parse_compressed_l2_entry() helper, Hanna Reitz, 2021/09/15
- [PULL 26/32] qcow2-refcount: fix_l2_entry_by_zero(): also zero L2 entry bitmap, Hanna Reitz, 2021/09/15
- [PULL 27/32] qcow2-refcount: check_refcounts_l2(): check l2_bitmap, Hanna Reitz, 2021/09/15
- [PULL 28/32] qcow2-refcount: check_refcounts_l2(): check reserved bits, Hanna Reitz, 2021/09/15
- [PULL 30/32] qcow2-refcount: check_refcounts_l1(): check reserved bits, Hanna Reitz, 2021/09/15
- [PULL 29/32] qcow2-refcount: improve style of check_refcounts_l1(), Hanna Reitz, 2021/09/15
- [PULL 31/32] qcow2-refcount: check_refblocks(): add separate message for reserved,
Hanna Reitz <=
- [PULL 32/32] qemu-img: Add -F shorthand to convert, Hanna Reitz, 2021/09/15
- Re: [PULL 00/32] Block patches, Peter Maydell, 2021/09/16