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| author | Vladimir Sementsov-Ogievskiy <vsementsov@virtuozzo.com> | 2021-09-14 15:24:51 +0300 |
|---|---|---|
| committer | Hanna Reitz <hreitz@redhat.com> | 2021-09-15 18:42:38 +0200 |
| commit | 289ef5f219d1a94b8225c459dc65821b37637a4f (patch) | |
| tree | e1a617f885f095593fdeae57bd88c8fb3d253e96 /block | |
| parent | 9631c7822ec60eff0701ebf151bd8b9bd5c1d5d4 (diff) | |
| download | qemu-289ef5f219d1a94b8225c459dc65821b37637a4f.zip qemu-289ef5f219d1a94b8225c459dc65821b37637a4f.tar.gz qemu-289ef5f219d1a94b8225c459dc65821b37637a4f.tar.bz2 | |
qcow2-refcount: check_refcounts_l2(): check reserved bits
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: <20210914122454.141075-8-vsementsov@virtuozzo.com>
[hreitz: Separated `type` declaration from statements]
Signed-off-by: Hanna Reitz <hreitz@redhat.com>
Diffstat (limited to 'block')
| -rw-r--r-- | block/qcow2-refcount.c | 14 | ||||
| -rw-r--r-- | block/qcow2.h | 1 |
2 files changed, 14 insertions, 1 deletions
diff --git a/block/qcow2-refcount.c b/block/qcow2-refcount.c index 9a5ae3c..bdac7b1 100644 --- a/block/qcow2-refcount.c +++ b/block/qcow2-refcount.c @@ -1680,10 +1680,22 @@ static int check_refcounts_l2(BlockDriverState *bs, BdrvCheckResult *res, for (i = 0; i < s->l2_size; i++) { uint64_t coffset; int csize; + QCow2ClusterType type; + l2_entry = get_l2_entry(s, l2_table, i); l2_bitmap = get_l2_bitmap(s, l2_table, i); + type = qcow2_get_cluster_type(bs, l2_entry); + + if (type != QCOW2_CLUSTER_COMPRESSED) { + /* Check reserved bits of Standard Cluster Descriptor */ + if (l2_entry & L2E_STD_RESERVED_MASK) { + fprintf(stderr, "ERROR found l2 entry with reserved bits set: " + "%" PRIx64 "\n", l2_entry); + res->corruptions++; + } + } - switch (qcow2_get_cluster_type(bs, l2_entry)) { + switch (type) { case QCOW2_CLUSTER_COMPRESSED: /* Compressed clusters don't have QCOW_OFLAG_COPIED */ if (l2_entry & QCOW_OFLAG_COPIED) { diff --git a/block/qcow2.h b/block/qcow2.h index c0e1e83..b8b1093 100644 --- a/block/qcow2.h +++ b/block/qcow2.h @@ -587,6 +587,7 @@ typedef enum QCow2MetadataOverlap { #define L1E_OFFSET_MASK 0x00fffffffffffe00ULL #define L2E_OFFSET_MASK 0x00fffffffffffe00ULL +#define L2E_STD_RESERVED_MASK 0x3f000000000001feULL #define REFT_OFFSET_MASK 0xfffffffffffffe00ULL |