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| author |   Soheil Hassas Yeganeh <soheil@google.com> | 2017-05-15 17:05:47 -0400 |
|---|---|---|
| committer |   David S. Miller <davem@davemloft.net> | 2017-05-16 12:45:21 -0400 |
| commit | bafbb9c73241760023d8981191ddd30bb1c6dbac (patch) | |
| tree | 1db6b24ae97377ab0f55c1e36b8dd3ae91880422 /net/ipv4/ipmr.c | |
| parent | Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net (diff) | |
| download | linux-dev-bafbb9c73241760023d8981191ddd30bb1c6dbac.tar.xz linux-dev-bafbb9c73241760023d8981191ddd30bb1c6dbac.zip | |
tcp: eliminate negative reordering in tcp_clean_rtx_queue
tcp_ack() can call tcp_fragment() which may dededuct the
value tp->fackets_out when MSS changes. When prior_fackets
is larger than tp->fackets_out, tcp_clean_rtx_queue() can
invoke tcp_update_reordering() with negative values. This
results in absurd tp->reodering values higher than
sysctl_tcp_max_reordering.
Note that tcp_update_reordering indeeds sets tp->reordering
to min(sysctl_tcp_max_reordering, metric), but because
the comparison is signed, a negative metric always wins.
Fixes: c7caf8d3ed7a ("[TCP]: Fix reord detection due to snd_una covered holes")
Reported-by: Rebecca Isaacs <risaacs@google.com>
Signed-off-by: Soheil Hassas Yeganeh <soheil@google.com>
Signed-off-by: Neal Cardwell <ncardwell@google.com>
Signed-off-by: Yuchung Cheng <ycheng@google.com>
Signed-off-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/ipv4/ipmr.c')
0 files changed, 0 insertions, 0 deletions