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| author | Patrick McHardy <kaber@trash.net> | 2010-04-15 13:29:28 +0200 |
|---|---|---|
| committer | Patrick McHardy <kaber@trash.net> | 2010-04-15 13:31:29 +0200 |
| commit | b0ebb739a8f68039f03e80b3476b204fe5adf0d7 (patch) | |
| tree | 45921e2969657f6a35fbac751218ea78e1f3be9b /net/ipv4/ipmr.c | |
| parent | 66496d4973dcb848d163805fa6b485850b7555e3 (diff) | |
| download | blackbird-op-linux-b0ebb739a8f68039f03e80b3476b204fe5adf0d7.tar.gz blackbird-op-linux-b0ebb739a8f68039f03e80b3476b204fe5adf0d7.zip | |
ipv4: ipmr: fix invalid cache resolving when adding a non-matching entry
The patch to convert struct mfc_cache to list_heads (ipv4: ipmr: convert
struct mfc_cache to struct list_head) introduced a bug when adding new
cache entries that don't match any unresolved entries.
The unres queue is searched for a matching entry, which is then resolved.
When no matching entry is present, the iterator points to the head of the
list, but is treated as a matching entry. Use a seperate variable to
indicate that a matching entry was found.
Signed-off-by: Patrick McHardy <kaber@trash.net>
Diffstat (limited to 'net/ipv4/ipmr.c')
| -rw-r--r-- | net/ipv4/ipmr.c | 4 |
1 files changed, 3 insertions, 1 deletions
diff --git a/net/ipv4/ipmr.c b/net/ipv4/ipmr.c index 5df5fd74c6d1..0643fb6d47c4 100644 --- a/net/ipv4/ipmr.c +++ b/net/ipv4/ipmr.c @@ -1089,12 +1089,14 @@ static int ipmr_mfc_add(struct net *net, struct mr_table *mrt, * Check to see if we resolved a queued list. If so we * need to send on the frames and tidy up. */ + found = false; spin_lock_bh(&mfc_unres_lock); list_for_each_entry(uc, &mrt->mfc_unres_queue, list) { if (uc->mfc_origin == c->mfc_origin && uc->mfc_mcastgrp == c->mfc_mcastgrp) { list_del(&uc->list); atomic_dec(&mrt->cache_resolve_queue_len); + found = true; break; } } @@ -1102,7 +1104,7 @@ static int ipmr_mfc_add(struct net *net, struct mr_table *mrt, del_timer(&mrt->ipmr_expire_timer); spin_unlock_bh(&mfc_unres_lock); - if (uc) { + if (found) { ipmr_cache_resolve(net, mrt, uc, c); ipmr_cache_free(uc); } |
