Am 05.08.2020 um 11:22 hat Tuguoyi geschrieben: > When calculating the offset, the result of left shift operation will be > promoted > to type int64 automatically because the left operand of + operator is > uint64_t. > but the result after integer promotion may be produce an error value for us > and > trigger the following asserting error. > > For example, consider i=0x2000, cluster_bits=18, the result of left shift > operation will be 0x80000000. Cause argument i is of signed integer type, > the result is automatically promoted to 0xffffffff80000000 which is not > we expected > > The way to trigger the assertion error: > qemu-img create -f qcow2 -o preallocation=full,cluster_size=256k tmpdisk 10G > > This patch fix it by casting @i to uint64_t before doing left shift operation > > Signed-off-by: Guoyi Tu <tu.gu...@h3c.com>
Reviewed-by: Kevin Wolf <kw...@redhat.com>
