From: Hannes Reinecke hare@suse.de
[ Upstream commit cd9aed606088d36a7ffff3e808db4e76b1854285 ]
nvme_configure_metadata() is issuing I/O, so we might incur an I/O error which will cause the connection to be reset. But in that case any further probing will race with reset and cause UAF errors. So return a status from nvme_configure_metadata() and abort probing if there was an I/O error.
Signed-off-by: Hannes Reinecke hare@suse.de Signed-off-by: Keith Busch kbusch@kernel.org Signed-off-by: Sasha Levin sashal@kernel.org --- drivers/nvme/host/core.c | 19 +++++++++++++------ 1 file changed, 13 insertions(+), 6 deletions(-)
diff --git a/drivers/nvme/host/core.c b/drivers/nvme/host/core.c index 21783aa2ee8e1..5e314a8fb9407 100644 --- a/drivers/nvme/host/core.c +++ b/drivers/nvme/host/core.c @@ -1813,16 +1813,18 @@ static int nvme_init_ms(struct nvme_ns *ns, struct nvme_id_ns *id) return ret; }
-static void nvme_configure_metadata(struct nvme_ns *ns, struct nvme_id_ns *id) +static int nvme_configure_metadata(struct nvme_ns *ns, struct nvme_id_ns *id) { struct nvme_ctrl *ctrl = ns->ctrl; + int ret;
- if (nvme_init_ms(ns, id)) - return; + ret = nvme_init_ms(ns, id); + if (ret) + return ret;
ns->features &= ~(NVME_NS_METADATA_SUPPORTED | NVME_NS_EXT_LBAS); if (!ns->ms || !(ctrl->ops->flags & NVME_F_METADATA_SUPPORTED)) - return; + return 0;
if (ctrl->ops->flags & NVME_F_FABRICS) { /* @@ -1831,7 +1833,7 @@ static void nvme_configure_metadata(struct nvme_ns *ns, struct nvme_id_ns *id) * remap the separate metadata buffer from the block layer. */ if (WARN_ON_ONCE(!(id->flbas & NVME_NS_FLBAS_META_EXT))) - return; + return 0;
ns->features |= NVME_NS_EXT_LBAS;
@@ -1858,6 +1860,7 @@ static void nvme_configure_metadata(struct nvme_ns *ns, struct nvme_id_ns *id) else ns->features |= NVME_NS_METADATA_SUPPORTED; } + return 0; }
static void nvme_set_queue_limits(struct nvme_ctrl *ctrl, @@ -2031,7 +2034,11 @@ static int nvme_update_ns_info_block(struct nvme_ns *ns, ns->lba_shift = id->lbaf[lbaf].ds; nvme_set_queue_limits(ns->ctrl, ns->queue);
- nvme_configure_metadata(ns, id); + ret = nvme_configure_metadata(ns, id); + if (ret < 0) { + blk_mq_unfreeze_queue(ns->disk->queue); + goto out; + } nvme_set_chunk_sectors(ns, id); nvme_update_disk_info(ns->disk, ns, id);