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vhdx: Check for 4 GB maximum log size on creation 

It's unclear what the real maximum is, but we use an uint32_t to store
the log size in vhdx_co_create(), so we should check that the given
value fits in 32 bits.

Signed-off-by: Kevin Wolf <kwolf@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
Reviewed-by: Jeff Cody <jcody@redhat.com>
This commit is contained in:
Kevin Wolf 2018-03-20 18:24:54 +01:00
parent 0fcc38e7d0
commit 6f16f7c562
1 changed files with 4 additions and 0 deletions
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4
block/vhdx.c
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@ -1829,6 +1829,10 @@ static int coroutine_fn vhdx_co_create(BlockdevCreateOptions *opts,
if (!vhdx_opts->has_log_size) {
log_size = DEFAULT_LOG_SIZE;
} else {
if (vhdx_opts->log_size > UINT32_MAX) {
error_setg(errp, "Log size must be smaller than 4 GB");
return -EINVAL;
}
log_size = vhdx_opts->log_size;
}
if (log_size < MiB || (log_size % MiB) != 0) {