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[PATCH] ISDN: check for userspace copy faults

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Most of the ISDN ->readstat() implementations needed to check
copy_to_user() and put_user() return values.

Signed-off-by: Jeff Garzik <jeff@garzik.org>
Cc: Karsten Keil <kkeil@suse.de>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
This commit is contained in:
Jeff Garzik
2006-10-17 00:10:40 -07:00
committed by Linus Torvalds
parent 04518bfe8e
commit 7786ce192f
5 changed files with 20 additions and 11 deletions
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3
drivers/isdn/isdnloop/isdnloop.c
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@ -446,7 +446,8 @@ isdnloop_readstatus(u_char __user *buf, int len, isdnloop_card * card)
for (p = buf, count = 0; count < len; p++, count++) {
if (card->msg_buf_read == card->msg_buf_write)
return count;
put_user(*card->msg_buf_read++, p);
if (put_user(*card->msg_buf_read++, p))
return -EFAULT;
if (card->msg_buf_read > card->msg_buf_end)
card->msg_buf_read = card->msg_buf;
}