net/smc: fix one NULL pointer dereference in smc_ib_is_sg_need_sync()

{
                    "product": "Linux",
                    "vendor": "Linux",
                    "defaultStatus": "unaffected",
                    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
                    "programFiles": [
                        "net/smc/smc_ib.c"
                    ],
                    "versions": [
                        {
                            "version": "0ef69e788411cba2af017db731a9fc62d255e9ac",
                            "lessThan": "0cdf1fd8fc59d44a48c694324611136910301ef9",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "0ef69e788411cba2af017db731a9fc62d255e9ac",
                            "lessThan": "f18d9b3abf9c6587372cc702f963a7592277ed56",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "0ef69e788411cba2af017db731a9fc62d255e9ac",
                            "lessThan": "eb929910bd4b4165920fa06a87b22cc6cae92e0e",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "0ef69e788411cba2af017db731a9fc62d255e9ac",
                            "lessThan": "34f17cbe027050b8d5316ea1b6f9bd7c378e92de",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "0ef69e788411cba2af017db731a9fc62d255e9ac",
                            "lessThan": "ba1e9421cf1a8369d25c3832439702a015d6b5f9",
                            "status": "affected",
                            "versionType": "git"
                        }
                    ]
                }

{
                    "product": "Linux",
                    "vendor": "Linux",
                    "defaultStatus": "affected",
                    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
                    "programFiles": [
                        "net/smc/smc_ib.c"
                    ],
                    "versions": [
                        {
                            "version": "6.0",
                            "status": "affected"
                        },
                        {
                            "version": "0",
                            "lessThan": "6.0",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.1.151",
                            "lessThanOrEqual": "6.1.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.6.105",
                            "lessThanOrEqual": "6.6.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.12.46",
                            "lessThanOrEqual": "6.12.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.16.6",
                            "lessThanOrEqual": "6.16.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.17",
                            "lessThanOrEqual": "*",
                            "status": "unaffected",
                            "versionType": "original_commit_for_fix"
                        }
                    ]
                }