Am 31.07.24 um 16:36 schrieb Peter Maydell:
In vdi_co_pwritev() we multiply a sector count by SECTOR_SIZE to get the size to write in bytes. Coverity notes that this means that we do the multiply as a 32x32->32 multiply before converting to 64 bits, which has the potential to overflow.This is very unlikely to happen, since the block map has 4 bytes per block and the maximum number of blocks in the image must fit into a 32-bit integer. But we can keep Coverity happy by including a cast so we do a 64-bit multiply here. Resolves: Coverity CID 1508076 Signed-off-by: Peter Maydell <peter.mayd...@linaro.org> --- block/vdi.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/block/vdi.c b/block/vdi.c index 6363da08cee..27c60ba18d0 100644 --- a/block/vdi.c +++ b/block/vdi.c @@ -728,7 +728,7 @@ nonallocating_write: logout("will write %u block map sectors starting from entry %u\n", n_sectors, bmap_first); ret = bdrv_co_pwrite(bs->file, bmap_offset * SECTOR_SIZE, - n_sectors * SECTOR_SIZE, base, 0); + n_sectors * (uint64_t)SECTOR_SIZE, base, 0); }return ret;
Thanks. Reviewed-by: Stefan Weil <s...@weilnetz.de>
