{
    "data_version": "4.0",
    "data_type": "CVE",
    "data_format": "MITRE",
    "CVE_data_meta": {
        "ID": "CVE-2024-39474",
        "ASSIGNER": "cve@kernel.org",
        "STATE": "PUBLIC"
    },
    "description": {
        "description_data": [
            {
                "lang": "eng",
                "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nmm/vmalloc: fix vmalloc which may return null if called with __GFP_NOFAIL\n\ncommit a421ef303008 (\"mm: allow !GFP_KERNEL allocations for kvmalloc\")\nincludes support for __GFP_NOFAIL, but it presents a conflict with commit\ndd544141b9eb (\"vmalloc: back off when the current task is OOM-killed\").  A\npossible scenario is as follows:\n\nprocess-a\n__vmalloc_node_range(GFP_KERNEL | __GFP_NOFAIL)\n    __vmalloc_area_node()\n        vm_area_alloc_pages()\n\t\t--> oom-killer send SIGKILL to process-a\n        if (fatal_signal_pending(current)) break;\n--> return NULL;\n\nTo fix this, do not check fatal_signal_pending() in vm_area_alloc_pages()\nif __GFP_NOFAIL set.\n\nThis issue occurred during OPLUS KASAN TEST. Below is part of the log\n-> oom-killer sends signal to process\n[65731.222840] [ T1308] oom-kill:constraint=CONSTRAINT_NONE,nodemask=(null),cpuset=/,mems_allowed=0,global_oom,task_memcg=/apps/uid_10198,task=gs.intelligence,pid=32454,uid=10198\n\n[65731.259685] [T32454] Call trace:\n[65731.259698] [T32454]  dump_backtrace+0xf4/0x118\n[65731.259734] [T32454]  show_stack+0x18/0x24\n[65731.259756] [T32454]  dump_stack_lvl+0x60/0x7c\n[65731.259781] [T32454]  dump_stack+0x18/0x38\n[65731.259800] [T32454]  mrdump_common_die+0x250/0x39c [mrdump]\n[65731.259936] [T32454]  ipanic_die+0x20/0x34 [mrdump]\n[65731.260019] [T32454]  atomic_notifier_call_chain+0xb4/0xfc\n[65731.260047] [T32454]  notify_die+0x114/0x198\n[65731.260073] [T32454]  die+0xf4/0x5b4\n[65731.260098] [T32454]  die_kernel_fault+0x80/0x98\n[65731.260124] [T32454]  __do_kernel_fault+0x160/0x2a8\n[65731.260146] [T32454]  do_bad_area+0x68/0x148\n[65731.260174] [T32454]  do_mem_abort+0x151c/0x1b34\n[65731.260204] [T32454]  el1_abort+0x3c/0x5c\n[65731.260227] [T32454]  el1h_64_sync_handler+0x54/0x90\n[65731.260248] [T32454]  el1h_64_sync+0x68/0x6c\n\n[65731.260269] [T32454]  z_erofs_decompress_queue+0x7f0/0x2258\n--> be->decompressed_pages = kvcalloc(be->nr_pages, sizeof(struct page *), GFP_KERNEL | __GFP_NOFAIL);\n\tkernel panic by NULL pointer dereference.\n\terofs assume kvmalloc with __GFP_NOFAIL never return NULL.\n[65731.260293] [T32454]  z_erofs_runqueue+0xf30/0x104c\n[65731.260314] [T32454]  z_erofs_readahead+0x4f0/0x968\n[65731.260339] [T32454]  read_pages+0x170/0xadc\n[65731.260364] [T32454]  page_cache_ra_unbounded+0x874/0xf30\n[65731.260388] [T32454]  page_cache_ra_order+0x24c/0x714\n[65731.260411] [T32454]  filemap_fault+0xbf0/0x1a74\n[65731.260437] [T32454]  __do_fault+0xd0/0x33c\n[65731.260462] [T32454]  handle_mm_fault+0xf74/0x3fe0\n[65731.260486] [T32454]  do_mem_abort+0x54c/0x1b34\n[65731.260509] [T32454]  el0_da+0x44/0x94\n[65731.260531] [T32454]  el0t_64_sync_handler+0x98/0xb4\n[65731.260553] [T32454]  el0t_64_sync+0x198/0x19c"
            }
        ]
    },
    "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": "9376130c390a",
                                            "version_value": "198a80833e34"
                                        },
                                        {
                                            "version_value": "not down converted",
                                            "x_cve_json_5_version_data": {
                                                "versions": [
                                                    {
                                                        "version": "5.17",
                                                        "status": "affected"
                                                    },
                                                    {
                                                        "version": "0",
                                                        "lessThan": "5.17",
                                                        "status": "unaffected",
                                                        "versionType": "custom"
                                                    },
                                                    {
                                                        "version": "6.1.95",
                                                        "lessThanOrEqual": "6.1.*",
                                                        "status": "unaffected",
                                                        "versionType": "custom"
                                                    },
                                                    {
                                                        "version": "6.6.34",
                                                        "lessThanOrEqual": "6.6.*",
                                                        "status": "unaffected",
                                                        "versionType": "custom"
                                                    },
                                                    {
                                                        "version": "6.9.5",
                                                        "lessThanOrEqual": "6.9.*",
                                                        "status": "unaffected",
                                                        "versionType": "custom"
                                                    },
                                                    {
                                                        "version": "6.10",
                                                        "lessThanOrEqual": "*",
                                                        "status": "unaffected",
                                                        "versionType": "original_commit_for_fix"
                                                    }
                                                ],
                                                "defaultStatus": "affected"
                                            }
                                        }
                                    ]
                                }
                            }
                        ]
                    }
                }
            ]
        }
    },
    "references": {
        "reference_data": [
            {
                "url": "https://git.kernel.org/stable/c/198a80833e3421d4c9820a4ae907120adf598c91",
                "refsource": "MISC",
                "name": "https://git.kernel.org/stable/c/198a80833e3421d4c9820a4ae907120adf598c91"
            },
            {
                "url": "https://git.kernel.org/stable/c/c55d3564ad25ce87ab7cc6af251f9574faebd8da",
                "refsource": "MISC",
                "name": "https://git.kernel.org/stable/c/c55d3564ad25ce87ab7cc6af251f9574faebd8da"
            },
            {
                "url": "https://git.kernel.org/stable/c/758678b65164b2158fc1de411092191cb3c394d4",
                "refsource": "MISC",
                "name": "https://git.kernel.org/stable/c/758678b65164b2158fc1de411092191cb3c394d4"
            },
            {
                "url": "https://git.kernel.org/stable/c/8e0545c83d672750632f46e3f9ad95c48c91a0fc",
                "refsource": "MISC",
                "name": "https://git.kernel.org/stable/c/8e0545c83d672750632f46e3f9ad95c48c91a0fc"
            }
        ]
    },
    "generator": {
        "engine": "bippy-c9c4e1df01b2"
    }
}