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| author | Paolo Abeni <pabeni@redhat.com> | 2021-05-11 19:13:51 +0200 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2021-05-12 01:19:17 +0200 |
| commit | 29249eac5225429b898f278230a6ca2baa1ae154 (patch) | |
| tree | da66634d5393a645fe2279d0e0a75c022304ee87 /net/sched/sch_etf.c | |
| parent | Merge git://git.kernel.org/pub/scm/linux/kernel/git/bpf/bpf (diff) | |
| download | linux-29249eac5225429b898f278230a6ca2baa1ae154.tar.xz linux-29249eac5225429b898f278230a6ca2baa1ae154.zip | |
mptcp: fix data stream corruption
Maxim reported several issues when forcing a TCP transparent proxy
to use the MPTCP protocol for the inbound connections. He also
provided a clean reproducer.
The problem boils down to 'mptcp_frag_can_collapse_to()' assuming
that only MPTCP will use the given page_frag.
If others - e.g. the plain TCP protocol - allocate page fragments,
we can end-up re-using already allocated memory for mptcp_data_frag.
Fix the issue ensuring that the to-be-expanded data fragment is
located at the current page frag end.
v1 -> v2:
- added missing fixes tag (Mat)
Closes: https://github.com/multipath-tcp/mptcp_net-next/issues/178
Reported-and-tested-by: Maxim Galaganov <max@internet.ru>
Fixes: 18b683bff89d ("mptcp: queue data for mptcp level retransmission")
Signed-off-by: Paolo Abeni <pabeni@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/sched/sch_etf.c')
0 files changed, 0 insertions, 0 deletions