Re:Re: Re: [PATCH v2] RDMA/srpt: fix NULL deref when sending BUSY before target_init_cmd()

kensanya <[email protected]> Mon, 27 Jul 2026 14:39:08 +0800 (CST)
Newsgroups org.kernel.vger.target-devel,org.kernel.vger.linux-kernel,org.kernel.vger.linux-rdma
Message-ID <[email protected]>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