tcp: beware of alignments in tcp_get_info()

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[ Upstream commit ff5d749772 ]

With some combinations of user provided flags in netlink command,
it is possible to call tcp_get_info() with a buffer that is not 8-bytes
aligned.

It does matter on some arches, so we need to use put_unaligned() to
store the u64 fields.

Current iproute2 package does not trigger this particular issue.

Fixes: 0df48c26d8 ("tcp: add tcpi_bytes_acked to tcp_info")
Fixes: 977cb0ecf8 ("tcp: add pacing_rate information into tcp_info")
Signed-off-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

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Eric Dumazet 2016-01-27 10:52:43 -08:00 • committed by Greg Kroah-Hartman

parent ba50e6d96f

commit 87e40d8d8b

1 changed files with 8 additions and 4 deletions

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net/ipv4/tcp.c

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