nvme-multipath: zero out ANA log buffer
When nvme_init_identify() fails the ANA log buffer is deallocated
but _not_ set to NULL. This can cause double free oops when this
controller is deleted without ever being reconnected.
Signed-off-by: Hannes Reinecke <hare@suse.com>
Signed-off-by: Christoph Hellwig <hch@lst.de>
diff --git a/drivers/nvme/host/multipath.c b/drivers/nvme/host/multipath.c
index 183ec17..df4b3a6 100644
--- a/drivers/nvme/host/multipath.c
+++ b/drivers/nvme/host/multipath.c
@@ -570,6 +570,7 @@ int nvme_mpath_init(struct nvme_ctrl *ctrl, struct nvme_id_ctrl *id)
return 0;
out_free_ana_log_buf:
kfree(ctrl->ana_log_buf);
+ ctrl->ana_log_buf = NULL;
out:
return error;
}
@@ -577,5 +578,6 @@ int nvme_mpath_init(struct nvme_ctrl *ctrl, struct nvme_id_ctrl *id)
void nvme_mpath_uninit(struct nvme_ctrl *ctrl)
{
kfree(ctrl->ana_log_buf);
+ ctrl->ana_log_buf = NULL;
}