Commit c16a98ed authored by Eric Dumazet's avatar Eric Dumazet Committed by David S. Miller

ipv6: tcp: fix panic in SYN processing

commit 72a3effa ([NET]: Size listen hash tables using backlog
hint) added a bug allowing inet6_synq_hash() to return an out of bound
array index, because of u16 overflow.

Bug can happen if system admins set net.core.somaxconn &
net.ipv4.tcp_max_syn_backlog sysctls to values greater than 65536
Signed-off-by: default avatarEric Dumazet <>
Signed-off-by: default avatarDavid S. Miller <>
parent 4d65a246
......@@ -85,7 +85,7 @@ struct dst_entry *inet6_csk_route_req(struct sock *sk,
* request_sock (formerly open request) hash tables.
static u32 inet6_synq_hash(const struct in6_addr *raddr, const __be16 rport,
const u32 rnd, const u16 synq_hsize)
const u32 rnd, const u32 synq_hsize)
u32 c;
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