GHSA-89WP-46HF-77PQ

Vulnerability from github – Published: 2025-10-04 18:31 – Updated: 2025-10-04 18:31
VLAI?
Details

In the Linux kernel, the following vulnerability has been resolved:

powerpc/rtas: avoid scheduling in rtas_os_term()

It's unsafe to use rtas_busy_delay() to handle a busy status from the ibm,os-term RTAS function in rtas_os_term():

Kernel panic - not syncing: Attempted to kill init! exitcode=0x0000000b BUG: sleeping function called from invalid context at arch/powerpc/kernel/rtas.c:618 in_atomic(): 1, irqs_disabled(): 1, non_block: 0, pid: 1, name: swapper/0 preempt_count: 2, expected: 0 CPU: 7 PID: 1 Comm: swapper/0 Tainted: G D 6.0.0-rc5-02182-gf8553a572277-dirty #9 Call Trace: [c000000007b8f000] [c000000001337110] dump_stack_lvl+0xb4/0x110 (unreliable) [c000000007b8f040] [c0000000002440e4] __might_resched+0x394/0x3c0 [c000000007b8f0e0] [c00000000004f680] rtas_busy_delay+0x120/0x1b0 [c000000007b8f100] [c000000000052d04] rtas_os_term+0xb8/0xf4 [c000000007b8f180] [c0000000001150fc] pseries_panic+0x50/0x68 [c000000007b8f1f0] [c000000000036354] ppc_panic_platform_handler+0x34/0x50 [c000000007b8f210] [c0000000002303c4] notifier_call_chain+0xd4/0x1c0 [c000000007b8f2b0] [c0000000002306cc] atomic_notifier_call_chain+0xac/0x1c0 [c000000007b8f2f0] [c0000000001d62b8] panic+0x228/0x4d0 [c000000007b8f390] [c0000000001e573c] do_exit+0x140c/0x1420 [c000000007b8f480] [c0000000001e586c] make_task_dead+0xdc/0x200

Use rtas_busy_delay_time() instead, which signals without side effects whether to attempt the ibm,os-term RTAS call again.

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{
  "affected": [],
  "aliases": [
    "CVE-2022-50504"
  ],
  "database_specific": {
    "cwe_ids": [],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2025-10-04T16:15:47Z",
    "severity": null
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\npowerpc/rtas: avoid scheduling in rtas_os_term()\n\nIt\u0027s unsafe to use rtas_busy_delay() to handle a busy status from\nthe ibm,os-term RTAS function in rtas_os_term():\n\nKernel panic - not syncing: Attempted to kill init! exitcode=0x0000000b\nBUG: sleeping function called from invalid context at arch/powerpc/kernel/rtas.c:618\nin_atomic(): 1, irqs_disabled(): 1, non_block: 0, pid: 1, name: swapper/0\npreempt_count: 2, expected: 0\nCPU: 7 PID: 1 Comm: swapper/0 Tainted: G      D            6.0.0-rc5-02182-gf8553a572277-dirty #9\nCall Trace:\n[c000000007b8f000] [c000000001337110] dump_stack_lvl+0xb4/0x110 (unreliable)\n[c000000007b8f040] [c0000000002440e4] __might_resched+0x394/0x3c0\n[c000000007b8f0e0] [c00000000004f680] rtas_busy_delay+0x120/0x1b0\n[c000000007b8f100] [c000000000052d04] rtas_os_term+0xb8/0xf4\n[c000000007b8f180] [c0000000001150fc] pseries_panic+0x50/0x68\n[c000000007b8f1f0] [c000000000036354] ppc_panic_platform_handler+0x34/0x50\n[c000000007b8f210] [c0000000002303c4] notifier_call_chain+0xd4/0x1c0\n[c000000007b8f2b0] [c0000000002306cc] atomic_notifier_call_chain+0xac/0x1c0\n[c000000007b8f2f0] [c0000000001d62b8] panic+0x228/0x4d0\n[c000000007b8f390] [c0000000001e573c] do_exit+0x140c/0x1420\n[c000000007b8f480] [c0000000001e586c] make_task_dead+0xdc/0x200\n\nUse rtas_busy_delay_time() instead, which signals without side effects\nwhether to attempt the ibm,os-term RTAS call again.",
  "id": "GHSA-89wp-46hf-77pq",
  "modified": "2025-10-04T18:31:14Z",
  "published": "2025-10-04T18:31:14Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2022-50504"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/4768935b8cc2d2afeb7956292df0f6e2c49ca0a5"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/482d990a5dd1027ee0b70a8a570d56749cac8103"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/515959eb49e6d218a46979d66f36fdef329ac7d2"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/6c606e57eecc37d6b36d732b1ff7e55b7dc32dd4"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/6f7e2fcab73372a371ab4017cbedf7a71f4f9b40"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/7280fdb80bf0fe35d9b799fc7009f2cbe0a397d7"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/bed48651c87bef59ea1a9d6dbc381bcbc452f4ff"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/f413135b337c4e90c1e593c6613f8717e17bc724"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/ffa991a003abb4f8cb9e5004646bfe2d9a46912c"
    }
  ],
  "schema_version": "1.4.0",
  "severity": []
}


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