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| author | Neil Horman <nhorman@tuxdriver.com> | 2013-01-17 11:15:08 +0000 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2013-02-14 10:49:05 -0800 |
| commit | 4c921d0ed5d49a93613530f4dd405fc2db3ccb84 (patch) | |
| tree | 2c88fd1c499ead4485c59908979d435ab7ccef03 /net/sctp/outqueue.c | |
| parent | b4129dae20d6e106cb197008d9adf617e1affa89 (diff) | |
| download | lwn-4c921d0ed5d49a93613530f4dd405fc2db3ccb84.tar.gz lwn-4c921d0ed5d49a93613530f4dd405fc2db3ccb84.zip | |
sctp: refactor sctp_outq_teardown to insure proper re-initalization
[ Upstream commit 2f94aabd9f6c925d77aecb3ff020f1cc12ed8f86 ]
Jamie Parsons reported a problem recently, in which the re-initalization of an
association (The duplicate init case), resulted in a loss of receive window
space. He tracked down the root cause to sctp_outq_teardown, which discarded
all the data on an outq during a re-initalization of the corresponding
association, but never reset the outq->outstanding_data field to zero. I wrote,
and he tested this fix, which does a proper full re-initalization of the outq,
fixing this problem, and hopefully future proofing us from simmilar issues down
the road.
Signed-off-by: Neil Horman <nhorman@tuxdriver.com>
Reported-by: Jamie Parsons <Jamie.Parsons@metaswitch.com>
Tested-by: Jamie Parsons <Jamie.Parsons@metaswitch.com>
CC: Jamie Parsons <Jamie.Parsons@metaswitch.com>
CC: Vlad Yasevich <vyasevich@gmail.com>
CC: "David S. Miller" <davem@davemloft.net>
CC: netdev@vger.kernel.org
Acked-by: Vlad Yasevich <vyasevich@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'net/sctp/outqueue.c')
| -rw-r--r-- | net/sctp/outqueue.c | 12 |
1 files changed, 8 insertions, 4 deletions
diff --git a/net/sctp/outqueue.c b/net/sctp/outqueue.c index cfeb1d4a1ee6..96eb168a1f47 100644 --- a/net/sctp/outqueue.c +++ b/net/sctp/outqueue.c @@ -223,7 +223,7 @@ void sctp_outq_init(struct sctp_association *asoc, struct sctp_outq *q) /* Free the outqueue structure and any related pending chunks. */ -void sctp_outq_teardown(struct sctp_outq *q) +static void __sctp_outq_teardown(struct sctp_outq *q) { struct sctp_transport *transport; struct list_head *lchunk, *temp; @@ -276,8 +276,6 @@ void sctp_outq_teardown(struct sctp_outq *q) sctp_chunk_free(chunk); } - q->error = 0; - /* Throw away any leftover control chunks. */ list_for_each_entry_safe(chunk, tmp, &q->control_chunk_list, list) { list_del_init(&chunk->list); @@ -285,11 +283,17 @@ void sctp_outq_teardown(struct sctp_outq *q) } } +void sctp_outq_teardown(struct sctp_outq *q) +{ + __sctp_outq_teardown(q); + sctp_outq_init(q->asoc, q); +} + /* Free the outqueue structure and any related pending chunks. */ void sctp_outq_free(struct sctp_outq *q) { /* Throw away leftover chunks. */ - sctp_outq_teardown(q); + __sctp_outq_teardown(q); /* If we were kmalloc()'d, free the memory. */ if (q->malloced) |