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mtd: partitions: redboot: Added conversion of operands to a larger type

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[ Upstream commit 1162bc2f8f5de7da23d18aa4b7fbd4e93c369c50 ]

The value of an arithmetic expression directory * master->erasesize is
subject to overflow due to a failure to cast operands to a larger data
type before perfroming arithmetic

Found by Linux Verification Center (linuxtesting.org) with SVACE.

Signed-off-by: Denis Arefev <arefev@swemel.ru>
Signed-off-by: Miquel Raynal <miquel.raynal@bootlin.com>
Link: https://lore.kernel.org/linux-mtd/20240315093758.20790-1-arefev@swemel.ru
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Denis Arefev 2024-03-15 12:37:58 +03:00 committed by Ksawlii
parent f2f02f7962
commit 89beb176d6
1 changed files with 1 additions and 1 deletions
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2
drivers/mtd/parsers/redboot.c
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@ -102,7 +102,7 @@ static int parse_redboot_partitions(struct mtd_info *master,
offset -= master->erasesize;
}
} else {
offset = directory * master->erasesize;
offset = (unsigned long) directory * master->erasesize;
while (mtd_block_isbad(master, offset)) {
offset += master->erasesize;
if (offset == master->size)