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mtd: diskonchip: Cast an operand to prevent potential overflow

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commit 9b458e8be0d13e81ed03fffa23f8f9b528bbd786 upstream.

There may be a potential integer overflow issue in inftl_partscan().
parts[0].size is defined as "uint64_t"  while mtd->erasesize and
ip->firstUnit are defined as 32-bit unsigned integer. The result of
the calculation will be limited to 32 bits without correct casting.

Fixes: 1da177e4c3f4 ("Linux-2.6.12-rc2")
Signed-off-by: Zichen Xie <zichenxie0106@gmail.com>
Cc: stable@vger.kernel.org
Signed-off-by: Miquel Raynal <miquel.raynal@bootlin.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Zichen Xie 2024-10-23 16:13:10 -05:00 • committed by Ksawlii
parent 5554be6263
commit db6bfb46d7
1 changed files with 1 additions and 1 deletions

2
drivers/mtd/nand/raw/diskonchip.c
View file

@ -1098,7 +1098,7 @@ static inline int __init inftl_partscan(struct mtd_info *mtd, struct mtd_partiti
(i == 0) && (ip->firstUnit > 0)) {
parts[0].name = " DiskOnChip IPL / Media Header partition";
parts[0].offset = 0;
parts[0].size = mtd->erasesize * ip->firstUnit;
parts[0].size = (uint64_t)mtd->erasesize * ip->firstUnit;
numparts = 1;
}