diff options
| author | Xi Wang <xi.wang@gmail.com> | 2011-12-16 12:44:15 +0000 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@suse.de> | 2012-01-06 14:17:28 -0800 |
| commit | 74631fca684d7a475f1eed5f6823c11b62bbd2bc (patch) | |
| tree | 7f4581d47ce64338943371c10fd5b56712aa5a5b /net/sctp/socket.c | |
| parent | 79a25778ca9fbc4ea2bd8c1f32d73bd73a1a3817 (diff) | |
sctp: fix incorrect overflow check on autoclose
[ Upstream commit 2692ba61a82203404abd7dd2a027bda962861f74 ]
Commit 8ffd3208 voids the previous patches f6778aab and 810c0719 for
limiting the autoclose value. If userspace passes in -1 on 32-bit
platform, the overflow check didn't work and autoclose would be set
to 0xffffffff.
This patch defines a max_autoclose (in seconds) for limiting the value
and exposes it through sysctl, with the following intentions.
1) Avoid overflowing autoclose * HZ.
2) Keep the default autoclose bound consistent across 32- and 64-bit
platforms (INT_MAX / HZ in this patch).
3) Keep the autoclose value consistent between setsockopt() and
getsockopt() calls.
Suggested-by: Vlad Yasevich <vladislav.yasevich@hp.com>
Signed-off-by: Xi Wang <xi.wang@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Diffstat (limited to 'net/sctp/socket.c')
| -rw-r--r-- | net/sctp/socket.c | 2 |
1 files changed, 0 insertions, 2 deletions
diff --git a/net/sctp/socket.c b/net/sctp/socket.c index 836aa63ee121..4760f4e65b80 100644 --- a/net/sctp/socket.c +++ b/net/sctp/socket.c @@ -2199,8 +2199,6 @@ static int sctp_setsockopt_autoclose(struct sock *sk, char __user *optval, return -EINVAL; if (copy_from_user(&sp->autoclose, optval, optlen)) return -EFAULT; - /* make sure it won't exceed MAX_SCHEDULE_TIMEOUT */ - sp->autoclose = min_t(long, sp->autoclose, MAX_SCHEDULE_TIMEOUT / HZ); return 0; } |