diff options
| author | Dmitry Popov <dp@highloadlab.com> | 2010-07-29 01:59:36 +0000 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@suse.de> | 2010-08-26 16:43:42 -0700 |
| commit | 77c043b1e3a8bbb264fca4018fc518e179324fef (patch) | |
| tree | 8026b54fd48817fe06d0b5e8ba62395659b26095 /net | |
| parent | 73be303e5c91ee98bfd67a5fba755ebc29aae391 (diff) | |
tcp: cookie transactions setsockopt memory leak
[ Upstream commit a3bdb549e30e7a263f7a589747c40e9c50110315 ]
There is a bug in do_tcp_setsockopt(net/ipv4/tcp.c),
TCP_COOKIE_TRANSACTIONS case.
In some cases (when tp->cookie_values == NULL) new tcp_cookie_values
structure can be allocated (at cvp), but not bound to
tp->cookie_values. So a memory leak occurs.
Signed-off-by: Dmitry Popov <dp@highloadlab.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Diffstat (limited to 'net')
| -rw-r--r-- | net/ipv4/tcp.c | 7 |
1 files changed, 5 insertions, 2 deletions
diff --git a/net/ipv4/tcp.c b/net/ipv4/tcp.c index 296150b2a62f..4fbf48132869 100644 --- a/net/ipv4/tcp.c +++ b/net/ipv4/tcp.c @@ -2175,6 +2175,8 @@ static int do_tcp_setsockopt(struct sock *sk, int level, GFP_KERNEL); if (cvp == NULL) return -ENOMEM; + + kref_init(&cvp->kref); } lock_sock(sk); tp->rx_opt.cookie_in_always = @@ -2189,12 +2191,11 @@ static int do_tcp_setsockopt(struct sock *sk, int level, */ kref_put(&tp->cookie_values->kref, tcp_cookie_values_release); - kref_init(&cvp->kref); - tp->cookie_values = cvp; } else { cvp = tp->cookie_values; } } + if (cvp != NULL) { cvp->cookie_desired = ctd.tcpct_cookie_desired; @@ -2208,6 +2209,8 @@ static int do_tcp_setsockopt(struct sock *sk, int level, cvp->s_data_desired = ctd.tcpct_s_data_desired; cvp->s_data_constant = 0; /* false */ } + + tp->cookie_values = cvp; } release_sock(sk); return err; |