From 1001ff7a4f64f3f4264e69d3ed70ff428f627e01 Mon Sep 17 00:00:00 2001 From: Brian Norris Date: Mon, 21 Jul 2014 19:07:12 -0700 Subject: mtd: tests: fix integer overflow issues These multiplications are done with 32-bit arithmetic, then converted to 64-bit. We should widen the integers first to prevent overflow. This could be a problem for large (>4GB) MTD's. Detected by Coverity. Signed-off-by: Brian Norris Cc: Akinobu Mita --- drivers/mtd/tests/pagetest.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) (limited to 'drivers/mtd/tests/pagetest.c') diff --git a/drivers/mtd/tests/pagetest.c b/drivers/mtd/tests/pagetest.c index ed2d3f656fd2..88296e888e9d 100644 --- a/drivers/mtd/tests/pagetest.c +++ b/drivers/mtd/tests/pagetest.c @@ -52,7 +52,7 @@ static struct rnd_state rnd_state; static int write_eraseblock(int ebnum) { - loff_t addr = ebnum * mtd->erasesize; + loff_t addr = (loff_t)ebnum * mtd->erasesize; prandom_bytes_state(&rnd_state, writebuf, mtd->erasesize); cond_resched(); @@ -64,7 +64,7 @@ static int verify_eraseblock(int ebnum) uint32_t j; int err = 0, i; loff_t addr0, addrn; - loff_t addr = ebnum * mtd->erasesize; + loff_t addr = (loff_t)ebnum * mtd->erasesize; addr0 = 0; for (i = 0; i < ebcnt && bbt[i]; ++i) -- cgit v1.2.3