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bc7f75eba5
nvmet_passthru_override_id_descs() walks a namespace identification descriptor list populated from the underlying passthru controller's Identify response, which is device reported. The loop advanced pos by device controlled amounts (sizeof(*cur) + nidl) without checking that the next descriptor header actually fits inside the buffer, so a malicious device could push pos to within a few bytes of the buffer end and cause cur->nidl, cur->nidt or the reserved field to be read past the allocation. Additionally, when a CSI descriptor lands exactly at the last valid header offset, cur + 1 points one byte past the end of the buffer. The unconditional memcpy(&csi, cur + 1, NVME_NIDT_CSI_LEN) could read that out-of-bounds byte and copy it back to the initiator via nvmet_copy_to_sgl(), leaking adjacent heap memory. Bounds check both the descriptor header and the CSI value before dereferencing them. Signed-off-by: Hari Mishal <harimishal1@gmail.com> Signed-off-by: Keith Busch <kbusch@kernel.org> |
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