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Fri, 14 Aug 2026 03:06:56 -0700 (PDT) From: Jack Wang To: gregkh@linuxfoundation.org, sashal@kernel.org, stable@vger.kernel.org Cc: dmitrii.omelchenko@cloud.ionos.com, Michael Roth , Diego GonzalezVillalobos , Herbert Xu , Jack Wang Subject: [stable-6.12 3/4] crypto: ccp - Fix checks for SNP_VLEK_LOAD input buffer length Date: Fri, 14 Aug 2026 12:02:56 +0200 Message-ID: <20260814100652.225499-4-jinpu.wang@ionos.com> X-Mailer: git-send-email 2.43.0 In-Reply-To: <20260814100652.225499-1-jinpu.wang@ionos.com> References: <20260814100652.225499-1-jinpu.wang@ionos.com> Precedence: bulk X-Mailing-List: stable@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit From: Michael Roth commit ed53a5050f42a3243a7ed8dfa49030e54034b952 upstream. The SNP_VLEK_LOAD IOCTL currently fails due to sev_cmd_buffer_len() returning the default expected buffer length of 0 instead of the correct value, which would be sizeof(struct sev_user_data_snp_vlek_load). Add specific handling for SNP_VLEK_LOAD so the correct expected size is returned. Reported-by: Diego GonzalezVillalobos Cc: Diego GonzalezVillalobos Fixes: 332d2c1d713e ("crypto: ccp: Add the SNP_VLEK_LOAD command") Signed-off-by: Michael Roth Signed-off-by: Herbert Xu [Jack: sev_cmd_buffer_len() in queue/6.12 does not yet have the SEV_CMD_SNP_FEATURE_INFO case the upstream context line matched against (it lands in a later, unrelated commit not queued here), so the new SEV_CMD_SNP_VLEK_LOAD case was placed directly after SEV_CMD_SNP_COMMIT instead. No functional difference from upstream.] Signed-off-by: Jack Wang --- drivers/crypto/ccp/sev-dev.c | 1 + 1 file changed, 1 insertion(+) diff --git a/drivers/crypto/ccp/sev-dev.c b/drivers/crypto/ccp/sev-dev.c index 7c05cae7e577..6e08378eb5fa 100644 --- a/drivers/crypto/ccp/sev-dev.c +++ b/drivers/crypto/ccp/sev-dev.c @@ -226,6 +226,7 @@ static int sev_cmd_buffer_len(int cmd) case SEV_CMD_SNP_GUEST_REQUEST: return sizeof(struct sev_data_snp_guest_request); case SEV_CMD_SNP_CONFIG: return sizeof(struct sev_user_data_snp_config); case SEV_CMD_SNP_COMMIT: return sizeof(struct sev_data_snp_commit); + case SEV_CMD_SNP_VLEK_LOAD: return sizeof(struct sev_user_data_snp_vlek_load); default: return 0; } -- 2.43.0