scsi: lpfc: nvmet: avoid hang / use-after-free when destroying targetport
[ Upstream commit c41f59884be5cca293ed61f3d64637dbba3a6381 ] We cannot wait on a completion object in the lpfc_nvme_targetport structure in the _destroy_targetport() code path because the NVMe/fc transport will free that structure immediately after the .targetport_delete() callback. This results in a use-after-free, and a hang if slub_debug=FZPU is enabled. Fix this by putting the completion on the stack. Signed-off-by: NEwan D. Milne <emilne@redhat.com> Acked-by: NJames Smart <james.smart@broadcom.com> Signed-off-by: NMartin K. Petersen <martin.petersen@oracle.com> Signed-off-by: NSasha Levin <sashal@kernel.org>
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