diff options
| author | Sowmini Varadhan <sowmini.varadhan@oracle.com> | 2017-12-22 09:38:59 -0800 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2018-04-13 19:48:08 +0200 |
| commit | 59bf03657ac6cd5595951440514ef59639d56648 (patch) | |
| tree | 57129c93593ce3ea587cef5245d5d518d104e1de /net | |
| parent | ca1853c03eae86fe8504f72fb80bb0b63b9834e4 (diff) | |
rds; Reset rs->rs_bound_addr in rds_add_bound() failure path
[ Upstream commit 7ae0c649c47f1c5d2db8cee6dd75855970af1669 ]
If the rds_sock is not added to the bind_hash_table, we must
reset rs_bound_addr so that rds_remove_bound will not trip on
this rds_sock.
rds_add_bound() does a rds_sock_put() in this failure path, so
failing to reset rs_bound_addr will result in a socket refcount
bug, and will trigger a WARN_ON with the stack shown below when
the application subsequently tries to close the PF_RDS socket.
WARNING: CPU: 20 PID: 19499 at net/rds/af_rds.c:496 \
rds_sock_destruct+0x15/0x30 [rds]
:
__sk_destruct+0x21/0x190
rds_remove_bound.part.13+0xb6/0x140 [rds]
rds_release+0x71/0x120 [rds]
sock_release+0x1a/0x70
sock_close+0xe/0x20
__fput+0xd5/0x210
task_work_run+0x82/0xa0
do_exit+0x2ce/0xb30
? syscall_trace_enter+0x1cc/0x2b0
do_group_exit+0x39/0xa0
SyS_exit_group+0x10/0x10
do_syscall_64+0x61/0x1a0
Signed-off-by: Sowmini Varadhan <sowmini.varadhan@oracle.com>
Acked-by: Santosh Shilimkar <santosh.shilimkar@oracle.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Sasha Levin <alexander.levin@microsoft.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'net')
| -rw-r--r-- | net/rds/bind.c | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/net/rds/bind.c b/net/rds/bind.c index 095f6ce583fe..adb53ae97a02 100644 --- a/net/rds/bind.c +++ b/net/rds/bind.c @@ -114,6 +114,7 @@ static int rds_add_bound(struct rds_sock *rs, __be32 addr, __be16 *port) rs, &addr, (int)ntohs(*port)); break; } else { + rs->rs_bound_addr = 0; rds_sock_put(rs); ret = -ENOMEM; break; |