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libpayload: Fix an integer overflow in USB mass storage 

Change-Id: I3d618497016478ea727c520e866d27dbc3ebf9af
Signed-off-by: Nico Huber <nico.huber@secunet.com>
Reviewed-on: http://review.coreboot.org/1070
Reviewed-by: Mathias Krause <minipli@googlemail.com>
Tested-by: build bot (Jenkins)
Reviewed-by: Patrick Georgi <patrick@georgi-clan.de>
This commit is contained in:
Nico Huber 2012-05-21 13:59:43 +02:00 committed by Patrick Georgi
parent 0421dc84df
commit c43e736c0c
1 changed files with 3 additions and 0 deletions
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3
payloads/libpayload/drivers/usb/usbmsc.c
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@ -360,6 +360,9 @@ read_capacity (usbdev_t *dev)
}
printf (" %d %d-byte sectors (%d MB)\n", MSC_INST (dev)->numblocks,
MSC_INST (dev)->blocksize,
/* round down high block counts to avoid integer overflow */
MSC_INST (dev)->numblocks > 1000000
? (MSC_INST (dev)->numblocks / 1000) * MSC_INST (dev)->blocksize / 1000 :
MSC_INST (dev)->numblocks * MSC_INST (dev)->blocksize / 1000 / 1000);
}