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mtd: mtdswap: fix integer overflow

Message ID 1405994822-19376-1-git-send-email-computersforpeace@gmail.com
State Accepted
Commit 8c3f3f1d7941bcb25590b784f84accd7dcb44ba3
Headers show

Commit Message

Brian Norris July 22, 2014, 2:07 a.m. UTC 
Caught by Coverity.

Signed-off-by: Brian Norris <computersforpeace@gmail.com>
---
 drivers/mtd/mtdswap.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
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Patch

diff --git a/drivers/mtd/mtdswap.c b/drivers/mtd/mtdswap.c
index 8b33b26eb12b..8ca8d41bb35e 100644
--- a/drivers/mtd/mtdswap.c
+++ b/drivers/mtd/mtdswap.c
@@ -1474,7 +1474,7 @@  static void mtdswap_add_mtd(struct mtd_blktrans_ops *tr, struct mtd_info *mtd)
 	}
 
 	eblocks = mtd_div_by_eb(use_size, mtd);
-	use_size = eblocks * mtd->erasesize;
+	use_size = (uint64_t)eblocks * mtd->erasesize;
 	bad_blocks = mtdswap_badblocks(mtd, use_size);
 	eavailable = eblocks - bad_blocks;