ubi: Refuse attaching if mtd's erasesize is 0

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[ Upstream commit 017c73a34a ]

There exists mtd devices with zero erasesize, which will trigger a
divide-by-zero exception while attaching ubi device.
Fix it by refusing attaching if mtd's erasesize is 0.

Fixes: 801c135ce7 ("UBI: Unsorted Block Images")
Reported-by: Yu Hao <yhao016@ucr.edu>
Link: https://lore.kernel.org/lkml/977347543.226888.1682011999468.JavaMail.zimbra@nod.at/T/
Signed-off-by: Zhihao Cheng <chengzhihao1@huawei.com>
Reviewed-by: Miquel Raynal <miquel.raynal@bootlin.com>
Signed-off-by: Richard Weinberger <richard@nod.at>
Signed-off-by: Sasha Levin <sashal@kernel.org>

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Zhihao Cheng 2023-04-23 19:10:41 +08:00 • committed by Greg Kroah-Hartman

parent f237b17611

commit 91aeb418b9

1 changed files with 7 additions and 0 deletions

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drivers/mtd/ubi/build.c

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