Multiplying block_num and mtd->erasesize may potentially overflow
as they are both unsigned ints and so the multiplication is evaluated
in unsigned int arithmetic. Cast block_adr to off_t to ensure
multiplication is off_t sized to avoid any potential overflow.
Detected by CoverityScan, CID#
1461264 ("Unintentional integer overflow")
Signed-off-by: Colin Ian King <colin.king@canonical.com>
Acked-by: Andrea Adami <andrea.adami@gmail.com>
Signed-off-by: Boris Brezillon <boris.brezillon@free-electrons.com>
/* create physical-logical table */
for (block_num = 0; block_num < phymax; block_num++) {
- block_adr = block_num * mtd->erasesize;
+ block_adr = (loff_t)block_num * mtd->erasesize;
if (mtd_block_isbad(mtd, block_adr))
continue;
return -EINVAL;
block_num = ftl->log2phy[log_num];
- block_adr = block_num * mtd->erasesize;
+ block_adr = (loff_t)block_num * mtd->erasesize;
block_ofs = mtd_mod_by_eb((u32)from, mtd);
err = mtd_read(mtd, block_adr + block_ofs, len, &retlen, buf);