Was testing ibacm with rxe loaded and the kernel oops'd after starting ibacm. This is 4.13-rc2: [71622.872134] BUG: unable to handle kernel NULL pointer dereference at (null) [71622.873509] IP: (null) [71622.874046] PGD 22dca8067 [71622.874047] P4D 22dca8067 [71622.874493] PUD 22dca7067 [71622.874947] PMD 0 [71622.875396] [71622.876001] Oops: 0010 [#1] SMP [71622.876524] Modules linked in: rdma_rxe ib_srp scsi_transport_srp scsi_mod rdma_ucm ib_umad ib_ipoib ib_uverbs mlx4_ib mlx4_core [71622.878395] CPU: 0 PID: 7 Comm: ksoftirqd/0 Tainted: G W 4.13.0-rc2+ #3 [71622.879644] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS Ubuntu-1.8.2-1ubuntu1 04/01/2014 [71622.881125] task: ffff88022ec84b00 task.stack: ffffc9000003c000 [71622.882084] RIP: 0010: (null) [71622.882699] RSP: 0018:ffffc9000003fca0 EFLAGS: 00010282 [71622.883554] RAX: ffffffff81a5d84c RBX: ffff880228d3b700 RCX: ffff880228d3b700 [71622.884710] RDX: ffffc9000003fcd8 RSI: ffff880228d3b700 RDI: 81a664c000000000 [71622.885860] RBP: ffffc9000003fcc8 R08: ffff880227a73400 R09: ffff880227a72c3c [71622.887013] R10: ffffc9000033d338 R11: 0000000000000100 R12: ffffc9000003fcd8 [71622.888167] R13: ffff880228dbfc00 R14: ffff880227820000 R15: ffffc9000033d280 [71622.889318] FS: 0000000000000000(0000) GS:ffff880236e00000(0000) knlGS:0000000000000000 [71622.890626] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [71622.891556] CR2: 0000000000000000 CR3: 000000022dca9000 CR4: 00000000000406b0 [71622.892698] Call Trace: [71622.893109] ? nf_hook_slow+0x25/0xa0 [71622.893713] __ip6_local_out+0xa1/0xb0 [71622.894330] ? inet6_unregister_icmp_sender+0x30/0x30 [71622.895161] ip6_local_out+0x17/0x40 [71622.895750] rxe_send+0x76/0x100 [rdma_rxe] [71622.896435] rxe_requester+0x9e1/0x11d0 [rdma_rxe] [71622.897222] rxe_do_task+0x82/0xf0 [rdma_rxe] [71622.897938] tasklet_action+0xa9/0xc0 [71622.898546] __do_softirq+0xdd/0x1e0 [71622.899132] run_ksoftirqd+0x24/0x40 [71622.899732] smpboot_thread_fn+0x105/0x160 [71622.900398] kthread+0xfe/0x140 [71622.900918] ? sort_range+0x20/0x20 [71622.901496] ? kthread_create_on_node+0x40/0x40 [71622.902242] ret_from_fork+0x25/0x30 [71622.902837] Code: Bad RIP value. [71622.903384] RIP: (null) RSP: ffffc9000003fca0 [71622.904236] CR2: 0000000000000000 [71622.904789] ---[ end trace 7744317ce238bd28 ]--- [71622.905547] Kernel panic - not syncing: Fatal exception in interrupt [71622.906701] Kernel Offset: disabled [71622.907272] ---[ end Kernel panic - not syncing: Fatal exception in interrupt -- To unsubscribe from this list: send the line "unsubscribe linux-rdma" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html