nvmet: use the local P2P device on metadata allocation failure

Overview

In the Linux kernel, the following vulnerability has been resolved:

nvmet: use the local P2P device on metadata allocation failure

nvmet_req_alloc_p2pmem_sgls() assigns req->p2p_dev only after the data and metadata SGL allocations succeed. If the data allocation succeeds but the metadata allocation fails, out_free_sg passes req->p2p_dev to pci_p2pmem_free_sgl() before that assignment has taken place.

Pass the local p2p_dev argument instead, so cleanup uses the same PCI device as the successful data allocation.

Affected

• Linux >= bcd9a0797d73eeff659582f23277e7ab6e5f18f3 < 3c231142c4f4bb96836469eb276026ec55940093
• Linux >= bcd9a0797d73eeff659582f23277e7ab6e5f18f3 < 32f21607911a1f69c8f0f93a6c28fe6f8490aa98
• Linux >= bcd9a0797d73eeff659582f23277e7ab6e5f18f3 < ce79a6c5cc1b8054ec8d3eba16adda4a36113438
• Linux >= bcd9a0797d73eeff659582f23277e7ab6e5f18f3 < 73bf0f9579633b531098a475e6e55c9316763aed
• Linux >= bcd9a0797d73eeff659582f23277e7ab6e5f18f3 < 4aa9c0f377a4de5e8fddce76b34ee4529639a1ff
• Linux c440cd080761b18a52cac20f2a42e5da1e3995af
• Linux 8a452d62e7cea3c8a2676a3b89a9118755a1a271
• Linux >= 5.10.43 < 5.11
• Linux >= 5.12.10 < 5.13
• Linux 5.13

Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.