{
    "data_version": "4.0",
    "data_type": "CVE",
    "data_format": "MITRE",
    "CVE_data_meta": {
        "ID": "CVE-2022-48940",
        "ASSIGNER": "cve@kernel.org",
        "STATE": "PUBLIC"
    },
    "description": {
        "description_data": [
            {
                "lang": "eng",
                "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nbpf: Fix crash due to incorrect copy_map_value\n\nWhen both bpf_spin_lock and bpf_timer are present in a BPF map value,\ncopy_map_value needs to skirt both objects when copying a value into and\nout of the map. However, the current code does not set both s_off and\nt_off in copy_map_value, which leads to a crash when e.g. bpf_spin_lock\nis placed in map value with bpf_timer, as bpf_map_update_elem call will\nbe able to overwrite the other timer object.\n\nWhen the issue is not fixed, an overwriting can produce the following\nsplat:\n\n[root@(none) bpf]# ./test_progs -t timer_crash\n[   15.930339] bpf_testmod: loading out-of-tree module taints kernel.\n[   16.037849] ==================================================================\n[   16.038458] BUG: KASAN: user-memory-access in __pv_queued_spin_lock_slowpath+0x32b/0x520\n[   16.038944] Write of size 8 at addr 0000000000043ec0 by task test_progs/325\n[   16.039399]\n[   16.039514] CPU: 0 PID: 325 Comm: test_progs Tainted: G           OE     5.16.0+ #278\n[   16.039983] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS ArchLinux 1.15.0-1 04/01/2014\n[   16.040485] Call Trace:\n[   16.040645]  <TASK>\n[   16.040805]  dump_stack_lvl+0x59/0x73\n[   16.041069]  ? __pv_queued_spin_lock_slowpath+0x32b/0x520\n[   16.041427]  kasan_report.cold+0x116/0x11b\n[   16.041673]  ? __pv_queued_spin_lock_slowpath+0x32b/0x520\n[   16.042040]  __pv_queued_spin_lock_slowpath+0x32b/0x520\n[   16.042328]  ? memcpy+0x39/0x60\n[   16.042552]  ? pv_hash+0xd0/0xd0\n[   16.042785]  ? lockdep_hardirqs_off+0x95/0xd0\n[   16.043079]  __bpf_spin_lock_irqsave+0xdf/0xf0\n[   16.043366]  ? bpf_get_current_comm+0x50/0x50\n[   16.043608]  ? jhash+0x11a/0x270\n[   16.043848]  bpf_timer_cancel+0x34/0xe0\n[   16.044119]  bpf_prog_c4ea1c0f7449940d_sys_enter+0x7c/0x81\n[   16.044500]  bpf_trampoline_6442477838_0+0x36/0x1000\n[   16.044836]  __x64_sys_nanosleep+0x5/0x140\n[   16.045119]  do_syscall_64+0x59/0x80\n[   16.045377]  ? lock_is_held_type+0xe4/0x140\n[   16.045670]  ? irqentry_exit_to_user_mode+0xa/0x40\n[   16.046001]  ? mark_held_locks+0x24/0x90\n[   16.046287]  ? asm_exc_page_fault+0x1e/0x30\n[   16.046569]  ? asm_exc_page_fault+0x8/0x30\n[   16.046851]  ? lockdep_hardirqs_on+0x7e/0x100\n[   16.047137]  entry_SYSCALL_64_after_hwframe+0x44/0xae\n[   16.047405] RIP: 0033:0x7f9e4831718d\n[   16.047602] Code: b4 0c 00 0f 05 eb a9 66 0f 1f 44 00 00 f3 0f 1e fa 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 8b 0d b3 6c 0c 00 f7 d8 64 89 01 48\n[   16.048764] RSP: 002b:00007fff488086b8 EFLAGS: 00000206 ORIG_RAX: 0000000000000023\n[   16.049275] RAX: ffffffffffffffda RBX: 00007f9e48683740 RCX: 00007f9e4831718d\n[   16.049747] RDX: 0000000000000000 RSI: 0000000000000000 RDI: 00007fff488086d0\n[   16.050225] RBP: 00007fff488086f0 R08: 00007fff488085d7 R09: 00007f9e4cb594a0\n[   16.050648] R10: 0000000000000000 R11: 0000000000000206 R12: 00007f9e484cde30\n[   16.051124] R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000\n[   16.051608]  </TASK>\n[   16.051762] =================================================================="
            }
        ]
    },
    "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": "68134668c17f",
                                            "version_value": "719d1c2524c8"
                                        },
                                        {
                                            "version_value": "not down converted",
                                            "x_cve_json_5_version_data": {
                                                "versions": [
                                                    {
                                                        "version": "5.15",
                                                        "status": "affected"
                                                    },
                                                    {
                                                        "version": "0",
                                                        "lessThan": "5.15",
                                                        "status": "unaffected",
                                                        "versionType": "semver"
                                                    },
                                                    {
                                                        "version": "5.15.26",
                                                        "lessThanOrEqual": "5.15.*",
                                                        "status": "unaffected",
                                                        "versionType": "semver"
                                                    },
                                                    {
                                                        "version": "5.16.12",
                                                        "lessThanOrEqual": "5.16.*",
                                                        "status": "unaffected",
                                                        "versionType": "semver"
                                                    },
                                                    {
                                                        "version": "5.17",
                                                        "lessThanOrEqual": "*",
                                                        "status": "unaffected",
                                                        "versionType": "original_commit_for_fix"
                                                    }
                                                ],
                                                "defaultStatus": "affected"
                                            }
                                        }
                                    ]
                                }
                            }
                        ]
                    }
                }
            ]
        }
    },
    "references": {
        "reference_data": [
            {
                "url": "https://git.kernel.org/stable/c/719d1c2524c89ada78c4c9202641c1d9e942a322",
                "refsource": "MISC",
                "name": "https://git.kernel.org/stable/c/719d1c2524c89ada78c4c9202641c1d9e942a322"
            },
            {
                "url": "https://git.kernel.org/stable/c/eca9bd215d2233de79d930fa97aefbce03247a98",
                "refsource": "MISC",
                "name": "https://git.kernel.org/stable/c/eca9bd215d2233de79d930fa97aefbce03247a98"
            },
            {
                "url": "https://git.kernel.org/stable/c/a8abb0c3dc1e28454851a00f8b7333d9695d566c",
                "refsource": "MISC",
                "name": "https://git.kernel.org/stable/c/a8abb0c3dc1e28454851a00f8b7333d9695d566c"
            }
        ]
    },
    "generator": {
        "engine": "bippy-9e1c9544281a"
    }
}