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qcow2: Fix new L1 table size check (CVE-2014-0143)

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The size in bytes is assigned to an int later, so check that instead of
the number of entries.

Signed-off-by: Kevin Wolf <kwolf@redhat.com>
Reviewed-by: Max Reitz <mreitz@redhat.com>
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
This commit is contained in:
Kevin Wolf 2014-03-26 13:05:53 +01:00 committed by Stefan Hajnoczi
parent 0abe740f1d
commit cab60de930
1 changed files with 1 additions and 1 deletions
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block/qcow2-cluster.c
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@ -55,7 +55,7 @@ int qcow2_grow_l1_table(BlockDriverState *bs, uint64_t min_size,
} }
} }
if (new_l1_size > INT_MAX) { if (new_l1_size > INT_MAX / sizeof(uint64_t)) {
return -EFBIG; return -EFBIG;
} }