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isdn: fix a wrapping bug in isdn_ppp_ioctl()

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"protos" is an array of unsigned longs and "i" is the number of bits in
an unsigned long so we need to use 1UL as well to prevent the shift
from wrapping around.

Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Dan Carpenter 2012-10-09 23:42:18 +00:00 committed by David S. Miller
parent 34e02aa1fb
commit 435f08a721
1 changed files with 1 additions and 1 deletions
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2
drivers/isdn/i4l/isdn_ppp.c
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@ -595,7 +595,7 @@ isdn_ppp_ioctl(int min, struct file *file, unsigned int cmd, unsigned long arg)
j = ipc->num / (sizeof(long) * 8);
i = ipc->num % (sizeof(long) * 8);
if (j < 8)
protos[j] |= (0x1 << i);
protos[j] |= (1UL << i);
ipc = ipc->next;
}
if ((r = set_arg(argp, protos, 8 * sizeof(long))))