Staging: bcm: Check correct user provided length and fix error code returned

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bcm driver copies a buffer length provided by userpace without checking it.

RxCntrlMsgBitMask is of type unsigned long so only makes sense to copy
sizeof(unsigned long) bytes.

Also, copy_from_user() returns the number of bytes that could not be copied.
The driver is returning that value as error code instead of -EFAULT.

This patch solves both issues.

Signed-off-by: Javier Martinez Canillas <martinez.javier@gmail.com>
Cc: Stephen Hemminger <shemminger@vyatta.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

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Javier Martinez Canillas 2011-01-25 01:46:18 +01:00 • committed by Greg Kroah-Hartman

parent c69ab1a2cf

commit 00719fab9f

1 changed files with 7 additions and 0 deletions

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drivers/staging/bcm/Bcmchar.c

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