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nvme-fc: initialize nvme_req(rq)->ctrl after calling __nvme_fc_init_request()
__nvme_fc_init_request() invokes memset() on the nvme_fcp_op_w_sgl structure, which NULLed-out the nvme_req(req)->ctrl field previously set by nvme_fc_init_request(). This apparently was not referenced until commit faf4a44fff ("nvme: support traffic based keep-alive") which now results in a crash in nvme_complete_rq(): [ 8386.897130] RIP: 0010:panic+0x220/0x26c [ 8386.901406] Code: 83 3d 6f ee 72 01 00 74 05 e8 e8 54 02 00 48 c7 c6 40 fd 5b b4 48 c7 c7 d8 8d c6 b3 31e [ 8386.922359] RSP: 0018:ffff99650019fc40 EFLAGS: 00000246 ORIG_RAX: ffffffffffffff13 [ 8386.930804] RAX: 0000000000000046 RBX: 0000000000000000 RCX: 0000000000000006 [ 8386.938764] RDX: 0000000000000000 RSI: 0000000000000082 RDI: ffff8e325f8168b0 [ 8386.946725] RBP: ffff99650019fcb0 R08: 0000000000000000 R09: 00000000000004f8 [ 8386.954687] R10: 0000000000000000 R11: ffff99650019f9b8 R12: ffffffffb3c55f3c [ 8386.962648] R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000001 [ 8386.970613] oops_end+0xd1/0xe0 [ 8386.974116] no_context+0x1b2/0x3c0 [ 8386.978006] do_page_fault+0x32/0x140 [ 8386.982090] page_fault+0x1e/0x30 [ 8386.985786] RIP: 0010:nvme_complete_rq+0x65/0x1d0 [nvme_core] [ 8386.992195] Code: 41 bc 03 00 00 00 74 16 0f 86 c3 00 00 00 66 3d 83 00 41 bc 06 00 00 00 0f 85 e7 00 000 [ 8387.013147] RSP: 0018:ffff99650019fe18 EFLAGS: 00010246 [ 8387.018973] RAX: 0000000000000000 RBX: ffff8e322ae51280 RCX: 0000000000000001 [ 8387.026935] RDX: 0000000000000400 RSI: 0000000000000001 RDI: ffff8e322ae51280 [ 8387.034897] RBP: ffff8e322ae51280 R08: 0000000000000000 R09: ffffffffb2f0b890 [ 8387.042859] R10: 0000000000000001 R11: 0000000000000000 R12: 0000000000000000 [ 8387.050821] R13: 0000000000000100 R14: 0000000000000004 R15: ffff8e2b0446d990 [ 8387.058782] ? swiotlb_unmap_page+0x40/0x40 [ 8387.063448] nvme_fc_complete_rq+0x2d/0x70 [nvme_fc] [ 8387.068986] blk_done_softirq+0xa1/0xd0 [ 8387.073264] __do_softirq+0xd6/0x2a9 [ 8387.077251] run_ksoftirqd+0x26/0x40 [ 8387.081238] smpboot_thread_fn+0x10e/0x160 [ 8387.085807] kthread+0xf8/0x130 [ 8387.089309] ? sort_range+0x20/0x20 [ 8387.093198] ? kthread_stop+0x110/0x110 [ 8387.097475] ret_from_fork+0x35/0x40 [ 8387.101462] ---[ end trace 7106b0adf5e422f8 ]--- Fixes: faf4a44fff ("nvme: support traffic based keep-alive") Signed-off-by: Ewan D. Milne <emilne@redhat.com> Reviewed-by: Hannes Reinecke <hare@suse.com> Signed-off-by: Christoph Hellwig <hch@lst.de>
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parent
d6a2b9535d
commit
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@ -1752,12 +1752,12 @@ nvme_fc_init_request(struct blk_mq_tag_set *set, struct request *rq,
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struct nvme_fc_queue *queue = &ctrl->queues[queue_idx];
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int res;
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nvme_req(rq)->ctrl = &ctrl->ctrl;
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res = __nvme_fc_init_request(ctrl, queue, &op->op, rq, queue->rqcnt++);
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if (res)
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return res;
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op->op.fcp_req.first_sgl = &op->sgl[0];
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op->op.fcp_req.private = &op->priv[0];
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nvme_req(rq)->ctrl = &ctrl->ctrl;
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return res;
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}
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