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| author | Peter Oskolkov <posk@google.com> | 2018-12-16 15:42:48 -0800 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2018-12-17 23:11:48 -0800 |
| commit | eedbbb0d98b2a89250a8bb83d9c71b77881e5247 (patch) | |
| tree | 69b9bf067315f9c8e3561d42d2a0b21abed330e4 /net/dccp | |
| parent | 6a95147c513190b8932c5ea695cb653272cf2c14 (diff) | |
| download | linux-eedbbb0d98b2a89250a8bb83d9c71b77881e5247.tar.bz2 | |
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 <syzkaller@googlegroups.com>
Signed-off-by: Peter Oskolkov <posk@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/dccp')
| -rw-r--r-- | net/dccp/proto.c | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/net/dccp/proto.c b/net/dccp/proto.c index 658cd32bb7b3..be0b223aa862 100644 --- a/net/dccp/proto.c +++ b/net/dccp/proto.c @@ -1141,6 +1141,9 @@ static int __init dccp_init(void) goto out_fail; rc = -ENOBUFS; inet_hashinfo_init(&dccp_hashinfo); + inet_hashinfo2_init(&dccp_hashinfo, "dccp_listen_portaddr_hash", + INET_LHTABLE_SIZE, 21, /* one slot per 2 MB*/ + 0, 64 * 1024); dccp_hashinfo.bind_bucket_cachep = kmem_cache_create("dccp_bind_bucket", sizeof(struct inet_bind_bucket), 0, |