The patch does not belong there in stable. It was my mistake. Sorry about that. Alex. > -----Original Message----- > From: gregkh@xxxxxxxxxxxxxxxxxxx [mailto:gregkh@xxxxxxxxxxxxxxxxxxx] > Sent: Monday, October 2, 2017 7:14 AM > To: Estrin, Alex <alex.estrin@xxxxxxxxx>; Dalessandro, Dennis > <dennis.dalessandro@xxxxxxxxx>; dledford@xxxxxxxxxx; leonro@xxxxxxxxxxxx; > yuval.shaia@xxxxxxxxxx > Cc: stable@xxxxxxxxxxxxxxx > Subject: FAILED: patch "[PATCH] IB/core: Fix for core panic" failed to apply to > 4.13-stable tree > > > The patch below does not apply to the 4.13-stable tree. > If someone wants it applied there, or to any other stable or longterm > tree, then please email the backport, including the original git commit > id to <stable@xxxxxxxxxxxxxxx>. > > thanks, > > greg k-h > > ------------------ original commit in Linus's tree ------------------ > > From e6f9bc34d3779cb7b6a337afed5de8be3f0fab77 Mon Sep 17 00:00:00 > 2001 > From: Alex Estrin <alex.estrin@xxxxxxxxx> > Date: Thu, 31 Aug 2017 09:30:34 -0700 > Subject: [PATCH] IB/core: Fix for core panic > > Build with the latest patches resulted in panic: > 11384.486289] BUG: unable to handle kernel NULL pointer dereference at > (null) > [11384.486293] IP: (null) > [11384.486295] PGD 0 > [11384.486295] P4D 0 > [11384.486296] > [11384.486299] Oops: 0010 [#1] SMP > ......... snip ...... > [11384.486401] CPU: 0 PID: 968 Comm: kworker/0:1H Tainted: G W O > 4.13.0-a-stream-20170825 #1 > [11384.486402] Hardware name: Intel Corporation S2600WT2R/S2600WT2R, > BIOS SE5C610.86B.01.01.0014.121820151719 12/18/2015 > [11384.486418] Workqueue: ib-comp-wq ib_cq_poll_work [ib_core] > [11384.486419] task: ffff880850579680 task.stack: ffffc90007fec000 > [11384.486420] RIP: 0010: (null) > [11384.486420] RSP: 0018:ffffc90007fef970 EFLAGS: 00010206 > [11384.486421] RAX: ffff88084cfe8000 RBX: ffff88084dce4000 RCX: > ffffc90007fef978 > [11384.486422] RDX: 0000000000000000 RSI: 0000000000000001 RDI: > ffff88084cfe8000 > [11384.486422] RBP: ffffc90007fefab0 R08: 0000000000000000 R09: > ffff88084dce4080 > [11384.486423] R10: ffffffffa02d7f60 R11: 0000000000000000 R12: > ffff88105af65a00 > [11384.486423] R13: ffff88084dce4000 R14: 000000000000c000 R15: > 000000000000c000 > [11384.486424] FS: 0000000000000000(0000) GS:ffff88085f400000(0000) > knlGS:0000000000000000 > [11384.486425] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 > [11384.486425] CR2: 0000000000000000 CR3: 0000000001c09000 CR4: > 00000000001406f0 > [11384.486426] Call Trace: > [11384.486431] ? is_valid_mcast_lid.isra.21+0xfb/0x110 [ib_core] > [11384.486436] ib_attach_mcast+0x6f/0xa0 [ib_core] > [11384.486441] ipoib_mcast_attach+0x81/0x190 [ib_ipoib] > [11384.486443] ipoib_mcast_join_complete+0x354/0xb40 [ib_ipoib] > [11384.486448] mcast_work_handler+0x330/0x6c0 [ib_core] > [11384.486452] join_handler+0x101/0x220 [ib_core] > [11384.486455] ib_sa_mcmember_rec_callback+0x54/0x80 [ib_core] > [11384.486459] recv_handler+0x3a/0x60 [ib_core] > [11384.486462] ib_mad_recv_done+0x423/0x9b0 [ib_core] > [11384.486466] __ib_process_cq+0x5d/0xb0 [ib_core] > [11384.486469] ib_cq_poll_work+0x20/0x60 [ib_core] > [11384.486472] process_one_work+0x149/0x360 > [11384.486474] worker_thread+0x4d/0x3c0 > [11384.486487] kthread+0x109/0x140 > [11384.486488] ? rescuer_thread+0x380/0x380 > [11384.486489] ? kthread_park+0x60/0x60 > [11384.486490] ? kthread_park+0x60/0x60 > [11384.486493] ret_from_fork+0x25/0x30 > [11384.486493] Code: Bad RIP value. > [11384.486493] Code: Bad RIP value. > [11384.486496] RIP: (null) RSP: ffffc90007fef970 > [11384.486497] CR2: 0000000000000000 > [11384.486531] ---[ end trace b1acec6fb4ff6e75 ]--- > [11384.532133] Kernel panic - not syncing: Fatal exception > [11384.536541] Kernel Offset: disabled > [11384.969491] ---[ end Kernel panic - not syncing: Fatal exception > [11384.976875] sched: Unexpected reschedule of offline CPU#1! > [11384.983646] ------------[ cut here ]------------ > > Rdma device driver may not have implemented (*get_link_layer)() > so it can not be called directly. Should use appropriate helper function. > > Reviewed-by: Yuval Shaia <yuval.shaia@xxxxxxxxxx> > Fixes: 523633359224 ("IB/core: Fix the validations of a multicast LID in attach or > detach operations") > Cc: stable@xxxxxxxxxx # 4.13 > Reviewed-by: Dennis Dalessandro <dennis.dalessandro@xxxxxxxxx> > Signed-off-by: Alex Estrin <alex.estrin@xxxxxxxxx> > Signed-off-by: Dennis Dalessandro <dennis.dalessandro@xxxxxxxxx> > Reviewed-by: Leon Romanovsky <leonro@xxxxxxxxxxxx> > Signed-off-by: Doug Ledford <dledford@xxxxxxxxxx> > > diff --git a/drivers/infiniband/core/verbs.c b/drivers/infiniband/core/verbs.c > index ee9e27dc799b..de57d6c11a25 100644 > --- a/drivers/infiniband/core/verbs.c > +++ b/drivers/infiniband/core/verbs.c > @@ -1646,7 +1646,7 @@ static bool is_valid_mcast_lid(struct ib_qp *qp, u16 lid) > */ > if (!ib_query_qp(qp, &attr, IB_QP_STATE | IB_QP_PORT, &init_attr)) { > if (attr.qp_state >= IB_QPS_INIT) { > - if (qp->device->get_link_layer(qp->device, attr.port_num) != > + if (rdma_port_get_link_layer(qp->device, attr.port_num) != > IB_LINK_LAYER_INFINIBAND) > return true; > goto lid_check; > @@ -1655,7 +1655,7 @@ static bool is_valid_mcast_lid(struct ib_qp *qp, u16 lid) > > /* Can't get a quick answer, iterate over all ports */ > for (port = 0; port < qp->device->phys_port_cnt; port++) > - if (qp->device->get_link_layer(qp->device, port) != > + if (rdma_port_get_link_layer(qp->device, port) != > IB_LINK_LAYER_INFINIBAND) > num_eth_ports++; >