ipv6: check raw payload size correctly in ioctl

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[ Upstream commit 105f5528b9 ]

In situations where an skb is paged, the transport header pointer and
tail pointer can be the same because the skb contents are in frags.

This results in ioctl(SIOCINQ/FIONREAD) incorrectly returning a
length of 0 when the length to receive is actually greater than zero.

skb->len is already correctly set in ip6_input_finish() with
pskb_pull(), so use skb->len as it always returns the correct result
for both linear and paged data.

Signed-off-by: Jamie Bainbridge <jbainbri@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

...

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Jamie Bainbridge 2017-04-26 10:43:27 +10:00 • committed by Greg Kroah-Hartman

parent 1dc1b7b508

commit b1fc1b057b

1 changed files with 1 additions and 2 deletions

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net/ipv6/raw.c

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