On 16.3.2017 04:24, Jitendra Bhivare wrote: > scsi host12: BS_1377 : mgmt_invalidate_connection Failed for cid=256 > BUG: unable to handle kernel NULL pointer dereference at 0000000000000008 > IP: [<ffffffff81332ebf>] __list_add+0xf/0xc0 > PGD 0 > Oops: 0000 [#1] SMP > Modules linked in: > ... > CPU: 9 PID: 1542 Comm: iscsid Tainted: G ------------ T 3.10.0-514.el7.x86_64 #1 > Hardware name: HP ProLiant DL360 Gen9/ProLiant DL360 Gen9, BIOS P89 09/12/2016 > task: ffff88076f310fb0 ti: ffff88076bba8000 task.ti: ffff88076bba8000 > RIP: 0010:[<ffffffff81332ebf>] [<ffffffff81332ebf>] __list_add+0xf/0xc0 > RSP: 0018:ffff88076bbab8e8 EFLAGS: 00010046 > RAX: 0000000000000246 RBX: ffff88076bbab990 RCX: 0000000000000000 > RDX: 0000000000000000 RSI: ffff880468badf58 RDI: ffff88076bbab990 > RBP: ffff88076bbab900 R08: 0000000000000246 R09: 00000000000020de > R10: 0000000000000000 R11: ffff88076bbab5be R12: 0000000000000000 > R13: ffff880468badf58 R14: 000000000001adb0 R15: ffff88076f310fb0 > FS: 00007f377124a880(0000) GS:ffff88046fa40000(0000) knlGS:0000000000000000 > CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 > CR2: 0000000000000008 CR3: 0000000771318000 CR4: 00000000001407e0 > DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 > DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000400 > Stack: > ffff88076bbab990 ffff880468badf50 0000000000000001 ffff88076bbab938 > ffffffff810b128b 0000000000000246 00000000cf9b7040 ffff880468bac7a0 > 0000000000000000 ffff880468bac7a0 ffff88076bbab9d0 ffffffffa05a6ea3 > > Call Trace: > [<ffffffff810b128b>] prepare_to_wait+0x7b/0x90 > [<ffffffffa05a6ea3>] beiscsi_mccq_compl_wait+0x153/0x330 [be2iscsi] > [<ffffffff810b1600>] ? wake_up_atomic_t+0x30/0x30 > [<ffffffffa05981b1>] beiscsi_ep_disconnect+0x91/0x2d0 [be2iscsi] > [<ffffffffa0202ffa>] iscsi_if_ep_disconnect.isra.14+0x5a/0x70 [scsi_transport_iscsi] > [<ffffffffa02042fb>] iscsi_if_recv_msg+0x113b/0x14a0 [scsi_transport_iscsi] > [<ffffffff811dffd8>] ? __kmalloc_node_track_caller+0x58/0x290 > [<ffffffffa02046ee>] iscsi_if_rx+0x8e/0x1f0 [scsi_transport_iscsi] > [<ffffffff815a351d>] netlink_unicast+0xed/0x1b0 > [<ffffffff815a38fe>] netlink_sendmsg+0x31e/0x690 > [<ffffffff815a03e4>] ? netlink_rcv_wake+0x44/0x60 > [<ffffffff815a19e3>] ? netlink_recvmsg+0x1e3/0x450 > > beiscsi_mccq_compl_wait gets called even when MCC tag allocation failed > for mgmt_invalidate_connection. > mcc_wait is not initialized for tag 0 so causes crash in prepare_to_wait. > > Signed-off-by: Jitendra Bhivare <jitendra.bhivare@xxxxxxxxxxxx> Reviewed-by: Tomas Henzl <thenzl@xxxxxxxxxx> tomash
