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| author | Paolo Abeni <pabeni@redhat.com> | 2018-06-08 11:35:40 +0200 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2018-06-09 01:55:15 +0200 |
| commit | 6c206b20092a3623184cff9470dba75d21507874 (patch) | |
| tree | acc594ed296987e67d25703d1317772239dd3132 /net/bridge | |
| parent | cdc_ncm: avoid padding beyond end of skb (diff) | |
| download | linux-6c206b20092a3623184cff9470dba75d21507874.tar.xz linux-6c206b20092a3623184cff9470dba75d21507874.zip | |
udp: fix rx queue len reported by diag and proc interface
After commit 6b229cf77d68 ("udp: add batching to udp_rmem_release()")
the sk_rmem_alloc field does not measure exactly anymore the
receive queue length, because we batch the rmem release. The issue
is really apparent only after commit 0d4a6608f68c ("udp: do rmem bulk
free even if the rx sk queue is empty"): the user space can easily
check for an empty socket with not-0 queue length reported by the 'ss'
tool or the procfs interface.
We need to use a custom UDP helper to report the correct queue length,
taking into account the forward allocation deficit.
Reported-by: trevor.francis@46labs.com
Fixes: 6b229cf77d68 ("UDP: add batching to udp_rmem_release()")
Signed-off-by: Paolo Abeni <pabeni@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/bridge')
0 files changed, 0 insertions, 0 deletions