This removes an ugly BUG_ON which has been pointed out by Arnaldo.
Instead of freezing up the machine, a `critical' message is now issued
to the system log.
There is potential of doing this more gracefully (eg. there are a few internal
variables which could be updated despite the lack of memory), but that requires
more complicated changes to the algorithm; thus a `FIXME' has been added.
Signed-off-by: Gerrit Renker <gerrit@xxxxxxxxxxxxxx>
Signed-off-by: Arnaldo Carvalho de Melo <acme@xxxxxxxxxx>
---
net/dccp/ccids/ccid2.c | 11 +++++------
1 files changed, 5 insertions(+), 6 deletions(-)
diff --git a/net/dccp/ccids/ccid2.c b/net/dccp/ccids/ccid2.c
index 5c6b4f9..3e4fa6b 100644
--- a/net/dccp/ccids/ccid2.c
+++ b/net/dccp/ccids/ccid2.c
@@ -294,12 +294,11 @@ static void ccid2_hc_tx_packet_sent(struct sock *sk, int more, unsigned int len)
next = hctx->ccid2hctx_seqh->ccid2s_next;
/* check if we need to alloc more space */
if (next == hctx->ccid2hctx_seqt) {
- int rc;
-
- ccid2_pr_debug("allocating more space in history\n");
- rc = ccid2_hc_tx_alloc_seq(hctx);
- BUG_ON(rc); /* XXX what do we do? */
-
+ if (ccid2_hc_tx_alloc_seq(hctx)) {
+ DCCP_CRIT("packet history - out of memory!");
+ /* FIXME: find a more graceful way to bail out */
+ return;
+ }
next = hctx->ccid2hctx_seqh->ccid2s_next;
BUG_ON(next == hctx->ccid2hctx_seqt);
}
--
1.5.2.2
-
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