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linux-stable/net/rds
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Guanglei Li 2c0aa08631 RDS: IB: Fix null pointer issue 
Scenario:
1. Port down and do fail over
2. Ap do rds_bind syscall

PID: 47039  TASK: ffff89887e2fe640  CPU: 47  COMMAND: "kworker/u:6"
 #0 [ffff898e35f159f0] machine_kexec at ffffffff8103abf9
 #1 [ffff898e35f15a60] crash_kexec at ffffffff810b96e3
 #2 [ffff898e35f15b30] oops_end at ffffffff8150f518
 #3 [ffff898e35f15b60] no_context at ffffffff8104854c
 #4 [ffff898e35f15ba0] __bad_area_nosemaphore at ffffffff81048675
 #5 [ffff898e35f15bf0] bad_area_nosemaphore at ffffffff810487d3
 #6 [ffff898e35f15c00] do_page_fault at ffffffff815120b8
 #7 [ffff898e35f15d10] page_fault at ffffffff8150ea95
    [exception RIP: unknown or invalid address]
    RIP: 0000000000000000  RSP: ffff898e35f15dc8  RFLAGS: 00010282
    RAX: 00000000fffffffe  RBX: ffff889b77f6fc00  RCX:ffffffff81c99d88
    RDX: 0000000000000000  RSI: ffff896019ee08e8  RDI:ffff889b77f6fc00
    RBP: ffff898e35f15df0   R8: ffff896019ee08c8  R9:0000000000000000
    R10: 0000000000000400  R11: 0000000000000000  R12:ffff896019ee08c0
    R13: ffff889b77f6fe68  R14: ffffffff81c99d80  R15: ffffffffa022a1e0
    ORIG_RAX: ffffffffffffffff  CS: 0010 SS: 0018
 #8 [ffff898e35f15dc8] cma_ndev_work_handler at ffffffffa022a228 [rdma_cm]
 #9 [ffff898e35f15df8] process_one_work at ffffffff8108a7c6
 #10 [ffff898e35f15e58] worker_thread at ffffffff8108bda0
 #11 [ffff898e35f15ee8] kthread at ffffffff81090fe6

PID: 45659  TASK: ffff880d313d2500  CPU: 31  COMMAND: "oracle_45659_ap"
 #0 [ffff881024ccfc98] __schedule at ffffffff8150bac4
 #1 [ffff881024ccfd40] schedule at ffffffff8150c2cf
 #2 [ffff881024ccfd50] __mutex_lock_slowpath at ffffffff8150cee7
 #3 [ffff881024ccfdc0] mutex_lock at ffffffff8150cdeb
 #4 [ffff881024ccfde0] rdma_destroy_id at ffffffffa022a027 [rdma_cm]
 #5 [ffff881024ccfe10] rds_ib_laddr_check at ffffffffa0357857 [rds_rdma]
 #6 [ffff881024ccfe50] rds_trans_get_preferred at ffffffffa0324c2a [rds]
 #7 [ffff881024ccfe80] rds_bind at ffffffffa031d690 [rds]
 #8 [ffff881024ccfeb0] sys_bind at ffffffff8142a670

PID: 45659                          PID: 47039
rds_ib_laddr_check
  /* create id_priv with a null event_handler */
  rdma_create_id
  rdma_bind_addr
    cma_acquire_dev
      /* add id_priv to cma_dev->id_list */
      cma_attach_to_dev
                                    cma_ndev_work_handler
                                      /* event_hanlder is null */
                                      id_priv->id.event_handler

Signed-off-by: Guanglei Li <guanglei.li@oracle.com>
Signed-off-by: Honglei Wang <honglei.wang@oracle.com>
Reviewed-by: Junxiao Bi <junxiao.bi@oracle.com>
Reviewed-by: Yanjun Zhu <yanjun.zhu@oracle.com>
Reviewed-by: Leon Romanovsky <leonro@mellanox.com>
Acked-by: Santosh Shilimkar <santosh.shilimkar@oracle.com>
Acked-by: Doug Ledford <dledford@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2018-02-06 11:44:32 -05:00
..
af_rds.c net: annotate ->poll() instances 2017-11-27 16:20:04 -05:00
bind.c rds; Reset rs->rs_bound_addr in rds_add_bound() failure path 2017-12-27 13:37:27 -05:00
cong.c rds: use RCU to synchronize work-enqueue with connection teardown 2018-01-05 13:39:18 -05:00
connection.c rds: use RCU to synchronize work-enqueue with connection teardown 2018-01-05 13:39:18 -05:00
ib.c RDS: IB: Fix null pointer issue 2018-02-06 11:44:32 -05:00
ib.h Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net 2017-11-04 09:26:51 +09:00
ib_cm.c Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net 2017-03-15 11:59:10 -07:00
ib_fmr.c net/rds/ib_fmr.c: use kmalloc_array_node() 2017-11-15 18:21:02 -08:00
ib_frmr.c RDS: IB: split the mr registration and invalidation path 2017-01-02 14:02:47 -08:00
ib_mr.h rds: ib: add the static type to the function 2017-03-13 23:20:05 -07:00
ib_rdma.c RDS: IB: Initialize max_items based on underlying device attributes 2017-10-05 21:16:33 -07:00
ib_recv.c rds: ib: Fix NULL pointer dereference in debug code 2017-11-10 14:54:47 +09:00
ib_ring.c
ib_send.c rds: Fix inaccurate accounting of unsignaled wrs 2017-10-26 17:35:57 +09:00
ib_stats.c RDS: IB: add few useful cache stasts 2017-01-02 14:02:51 -08:00
ib_sysctl.c
info.c
info.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
Kconfig
loop.c RDS: TCP: Hooks to set up a single connection path 2016-07-01 16:45:17 -04:00
loop.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
Makefile License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
message.c net, rds: convert rds_message.m_refcount from atomic_t to refcount_t 2017-07-04 22:35:18 +01:00
page.c rds: remove dead code 2016-12-26 21:35:39 -05:00
rdma.c RDS: null pointer dereference in rds_atomic_free_op 2018-01-04 14:19:26 -05:00
rdma_transport.c RDS: RDMA: start rdma listening after init 2017-01-02 14:02:45 -08:00
rdma_transport.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
rds.h rds: Use atomic flag to track connections being destroyed 2018-01-05 13:39:18 -05:00
rds_single_path.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
recv.c net, rds: convert rds_incoming.i_refcount from atomic_t to refcount_t 2017-07-04 22:35:17 +01:00
send.c rds: use RCU to synchronize work-enqueue with connection teardown 2018-01-05 13:39:18 -05:00
stats.c
sysctl.c net: rds: fix coding style issues 2016-06-18 21:34:09 -07:00
tcp.c Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net 2018-01-23 13:51:56 -05:00
tcp.h Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net 2018-01-23 13:51:56 -05:00
tcp_connect.c rds: Use atomic flag to track connections being destroyed 2018-01-05 13:39:18 -05:00
tcp_listen.c rds: tcp: use sock_create_lite() to create the accept socket 2017-07-08 11:16:16 +01:00
tcp_recv.c rds: use RCU to synchronize work-enqueue with connection teardown 2018-01-05 13:39:18 -05:00
tcp_send.c Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net 2018-01-23 13:51:56 -05:00
tcp_stats.c
threads.c rds: use RCU to synchronize work-enqueue with connection teardown 2018-01-05 13:39:18 -05:00
transport.c rds: remove unnecessary returned value check 2017-03-03 09:51:22 -08:00