From eedbbb0d98b2a89250a8bb83d9c71b77881e5247 Mon Sep 17 00:00:00 2001 From: Peter Oskolkov Date: Sun, 16 Dec 2018 15:42:48 -0800 Subject: net: dccp: initialize (addr,port) listening hashtable Commit d9fbc7f6431f "net: tcp: prefer listeners bound to an address" removes port-only listener lookups. This caused segfaults in DCCP lookups because DCCP did not initialize the (addr,port) hashtable. This patch adds said initialization. The only non-trivial issue here is the size of the new hashtable. It seemed reasonable to make it match the size of the port-only hashtable (= INET_LHTABLE_SIZE) that was used previously. Other parameters to inet_hashinfo2_init() match those used in TCP. V2 changes: marked inet_hashinfo2_init as an exported symbol so that DCCP compiles when configured as a module. Tested: syzcaller issues fixed; the second patch in the patchset tests that DCCP lookups work correctly. Fixes: d9fbc7f6431f "net: tcp: prefer listeners bound to an address" Reported-by: syzcaller Signed-off-by: Peter Oskolkov Signed-off-by: David S. Miller --- net/ipv4/inet_hashtables.c | 1 + 1 file changed, 1 insertion(+) (limited to 'net/ipv4') diff --git a/net/ipv4/inet_hashtables.c b/net/ipv4/inet_hashtables.c index cd03ab42705b..2445614de6a7 100644 --- a/net/ipv4/inet_hashtables.c +++ b/net/ipv4/inet_hashtables.c @@ -785,6 +785,7 @@ void __init inet_hashinfo2_init(struct inet_hashinfo *h, const char *name, h->lhash2[i].count = 0; } } +EXPORT_SYMBOL_GPL(inet_hashinfo2_init); int inet_ehash_locks_alloc(struct inet_hashinfo *hashinfo) { -- cgit v1.2.3-59-g8ed1b