{
    "data_version": "4.0",
    "data_type": "CVE",
    "data_format": "MITRE",
    "CVE_data_meta": {
        "ID": "CVE-2021-47481",
        "ASSIGNER": "cve@kernel.org",
        "STATE": "PUBLIC"
    },
    "description": {
        "description_data": [
            {
                "lang": "eng",
                "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nRDMA/mlx5: Initialize the ODP xarray when creating an ODP MR\n\nNormally the zero fill would hide the missing initialization, but an\nerrant set to desc_size in reg_create() causes a crash:\n\n  BUG: unable to handle page fault for address: 0000000800000000\n  PGD 0 P4D 0\n  Oops: 0000 [#1] SMP PTI\n  CPU: 5 PID: 890 Comm: ib_write_bw Not tainted 5.15.0-rc4+ #47\n  Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS rel-1.13.0-0-gf21b5a4aeb02-prebuilt.qemu.org 04/01/2014\n  RIP: 0010:mlx5_ib_dereg_mr+0x14/0x3b0 [mlx5_ib]\n  Code: 48 63 cd 4c 89 f7 48 89 0c 24 e8 37 30 03 e1 48 8b 0c 24 eb a0 90 0f 1f 44 00 00 41 56 41 55 41 54 55 53 48 89 fb 48 83 ec 30 <48> 8b 2f 65 48 8b 04 25 28 00 00 00 48 89 44 24 28 31 c0 8b 87 c8\n  RSP: 0018:ffff88811afa3a60 EFLAGS: 00010286\n  RAX: 000000000000001c RBX: 0000000800000000 RCX: 0000000000000000\n  RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000800000000\n  RBP: 0000000800000000 R08: 0000000000000000 R09: c0000000fffff7ff\n  R10: ffff88811afa38f8 R11: ffff88811afa38f0 R12: ffffffffa02c7ac0\n  R13: 0000000000000000 R14: ffff88811afa3cd8 R15: ffff88810772fa00\n  FS:  00007f47b9080740(0000) GS:ffff88852cd40000(0000) knlGS:0000000000000000\n  CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033\n  CR2: 0000000800000000 CR3: 000000010761e003 CR4: 0000000000370ea0\n  DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000\n  DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400\n  Call Trace:\n   mlx5_ib_free_odp_mr+0x95/0xc0 [mlx5_ib]\n   mlx5_ib_dereg_mr+0x128/0x3b0 [mlx5_ib]\n   ib_dereg_mr_user+0x45/0xb0 [ib_core]\n   ? xas_load+0x8/0x80\n   destroy_hw_idr_uobject+0x1a/0x50 [ib_uverbs]\n   uverbs_destroy_uobject+0x2f/0x150 [ib_uverbs]\n   uobj_destroy+0x3c/0x70 [ib_uverbs]\n   ib_uverbs_cmd_verbs+0x467/0xb00 [ib_uverbs]\n   ? uverbs_finalize_object+0x60/0x60 [ib_uverbs]\n   ? ttwu_queue_wakelist+0xa9/0xe0\n   ? pty_write+0x85/0x90\n   ? file_tty_write.isra.33+0x214/0x330\n   ? process_echoes+0x60/0x60\n   ib_uverbs_ioctl+0xa7/0x110 [ib_uverbs]\n   __x64_sys_ioctl+0x10d/0x8e0\n   ? vfs_write+0x17f/0x260\n   do_syscall_64+0x3c/0x80\n   entry_SYSCALL_64_after_hwframe+0x44/0xae\n\nAdd the missing xarray initialization and remove the desc_size set."
            }
        ]
    },
    "problemtype": {
        "problemtype_data": [
            {
                "description": [
                    {
                        "lang": "eng",
                        "value": "n/a"
                    }
                ]
            }
        ]
    },
    "affects": {
        "vendor": {
            "vendor_data": [
                {
                    "vendor_name": "Linux",
                    "product": {
                        "product_data": [
                            {
                                "product_name": "Linux",
                                "version": {
                                    "version_data": [
                                        {
                                            "version_affected": "<",
                                            "version_name": "a639e66703ee",
                                            "version_value": "5f6995295f65"
                                        },
                                        {
                                            "version_value": "not down converted",
                                            "x_cve_json_5_version_data": {
                                                "versions": [
                                                    {
                                                        "version": "5.13",
                                                        "status": "affected"
                                                    },
                                                    {
                                                        "version": "0",
                                                        "lessThan": "5.13",
                                                        "status": "unaffected",
                                                        "versionType": "custom"
                                                    },
                                                    {
                                                        "version": "5.14.16",
                                                        "lessThanOrEqual": "5.14.*",
                                                        "status": "unaffected",
                                                        "versionType": "custom"
                                                    },
                                                    {
                                                        "version": "5.15",
                                                        "lessThanOrEqual": "*",
                                                        "status": "unaffected",
                                                        "versionType": "original_commit_for_fix"
                                                    }
                                                ],
                                                "defaultStatus": "affected"
                                            }
                                        }
                                    ]
                                }
                            }
                        ]
                    }
                }
            ]
        }
    },
    "references": {
        "reference_data": [
            {
                "url": "https://git.kernel.org/stable/c/5f6995295f65d1ee6f36d466d26afd98eb797afe",
                "refsource": "MISC",
                "name": "https://git.kernel.org/stable/c/5f6995295f65d1ee6f36d466d26afd98eb797afe"
            },
            {
                "url": "https://git.kernel.org/stable/c/5508546631a0f555d7088203dec2614e41b5106e",
                "refsource": "MISC",
                "name": "https://git.kernel.org/stable/c/5508546631a0f555d7088203dec2614e41b5106e"
            }
        ]
    },
    "generator": {
        "engine": "bippy-a5840b7849dd"
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}