qemu-img: validate image length in img_map
The code handles this case correctly: we merely skip the loop. However it is probably best to return an explicit error. Reviewed-by: Eric Blake <eblake@redhat.com> Acked-by: Mark Kanda <mark.kanda@oracle.com> Signed-off-by: Eyal Moscovici <eyal.moscovici@oracle.com> Message-Id: <20200513133629.18508-3-eyal.moscovici@oracle.com> [eblake: commit message tweak] Signed-off-by: Eric Blake <eblake@redhat.com>
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@ -3092,6 +3092,11 @@ static int img_map(int argc, char **argv)
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}
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length = blk_getlength(blk);
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if (length < 0) {
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error_report("Failed to get size for '%s'", filename);
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return 1;
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}
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while (curr.start + curr.length < length) {
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int64_t offset = curr.start + curr.length;
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int64_t n;
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