6.9-stable review patch. If anyone has any objections, please let me know. ------------------ From: Denis Arefev <arefev@xxxxxxxxx> [ 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@xxxxxxxxx> Signed-off-by: Miquel Raynal <miquel.raynal@xxxxxxxxxxx> Link: https://lore.kernel.org/linux-mtd/20240315093758.20790-1-arefev@xxxxxxxxx Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx> --- drivers/mtd/parsers/redboot.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/mtd/parsers/redboot.c b/drivers/mtd/parsers/redboot.c index a16b42a885816..3b55b676ca6b9 100644 --- a/drivers/mtd/parsers/redboot.c +++ b/drivers/mtd/parsers/redboot.c @@ -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) -- 2.43.0
