cve-2022-48755
Vulnerability from cvelistv5
Published
2024-06-20 11:13
Modified
2024-09-11 17:34
Severity ?
Summary
powerpc64/bpf: Limit 'ldbrx' to processors compliant with ISA v2.06
Impacted products
LinuxLinux
LinuxLinux
Show details on NVD website


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        "metrics": [
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                "id": "CVE-2022-48755",
                "options": [
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                    "Exploitation": "none"
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                    "Automatable": "no"
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    "cna": {
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          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
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            "arch/powerpc/net/bpf_jit_comp64.c"
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          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
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          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\npowerpc64/bpf: Limit \u0027ldbrx\u0027 to processors compliant with ISA v2.06\n\nJohan reported the below crash with test_bpf on ppc64 e5500:\n\n  test_bpf: #296 ALU_END_FROM_LE 64: 0x0123456789abcdef -\u003e 0x67452301 jited:1\n  Oops: Exception in kernel mode, sig: 4 [#1]\n  BE PAGE_SIZE=4K SMP NR_CPUS=24 QEMU e500\n  Modules linked in: test_bpf(+)\n  CPU: 0 PID: 76 Comm: insmod Not tainted 5.14.0-03771-g98c2059e008a-dirty #1\n  NIP:  8000000000061c3c LR: 80000000006dea64 CTR: 8000000000061c18\n  REGS: c0000000032d3420 TRAP: 0700   Not tainted (5.14.0-03771-g98c2059e008a-dirty)\n  MSR:  0000000080089000 \u003cEE,ME\u003e  CR: 88002822  XER: 20000000 IRQMASK: 0\n  \u003c...\u003e\n  NIP [8000000000061c3c] 0x8000000000061c3c\n  LR [80000000006dea64] .__run_one+0x104/0x17c [test_bpf]\n  Call Trace:\n   .__run_one+0x60/0x17c [test_bpf] (unreliable)\n   .test_bpf_init+0x6a8/0xdc8 [test_bpf]\n   .do_one_initcall+0x6c/0x28c\n   .do_init_module+0x68/0x28c\n   .load_module+0x2460/0x2abc\n   .__do_sys_init_module+0x120/0x18c\n   .system_call_exception+0x110/0x1b8\n   system_call_common+0xf0/0x210\n  --- interrupt: c00 at 0x101d0acc\n  \u003c...\u003e\n  ---[ end trace 47b2bf19090bb3d0 ]---\n\n  Illegal instruction\n\nThe illegal instruction turned out to be \u0027ldbrx\u0027 emitted for\nBPF_FROM_[L|B]E, which was only introduced in ISA v2.06. Guard use of\nthe same and implement an alternative approach for older processors."
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      "title": "powerpc64/bpf: Limit \u0027ldbrx\u0027 to processors compliant with ISA v2.06",
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    "assignerShortName": "Linux",
    "cveId": "CVE-2022-48755",
    "datePublished": "2024-06-20T11:13:35.212Z",
    "dateReserved": "2024-06-20T11:09:39.059Z",
    "dateUpdated": "2024-09-11T17:34:47.728Z",
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