GHSA-8C3Q-MR36-WH76

Vulnerability from github – Published: 2025-12-08 03:31 – Updated: 2025-12-08 03:31
VLAI?
Details

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

regmap: slimbus: fix bus_context pointer in regmap init calls

Commit 4e65bda8273c ("ASoC: wcd934x: fix error handling in wcd934x_codec_parse_data()") revealed the problem in the slimbus regmap. That commit breaks audio playback, for instance, on sdm845 Thundercomm Dragonboard 845c board:

Unable to handle kernel paging request at virtual address ffff8000847cbad4 ... CPU: 5 UID: 0 PID: 776 Comm: aplay Not tainted 6.18.0-rc1-00028-g7ea30958b305 #11 PREEMPT Hardware name: Thundercomm Dragonboard 845c (DT) ... Call trace: slim_xfer_msg+0x24/0x1ac [slimbus] (P) slim_read+0x48/0x74 [slimbus] regmap_slimbus_read+0x18/0x24 [regmap_slimbus] _regmap_raw_read+0xe8/0x174 _regmap_bus_read+0x44/0x80 _regmap_read+0x60/0xd8 _regmap_update_bits+0xf4/0x140 _regmap_select_page+0xa8/0x124 _regmap_raw_write_impl+0x3b8/0x65c _regmap_bus_raw_write+0x60/0x80 _regmap_write+0x58/0xc0 regmap_write+0x4c/0x80 wcd934x_hw_params+0x494/0x8b8 [snd_soc_wcd934x] snd_soc_dai_hw_params+0x3c/0x7c [snd_soc_core] __soc_pcm_hw_params+0x22c/0x634 [snd_soc_core] dpcm_be_dai_hw_params+0x1d4/0x38c [snd_soc_core] dpcm_fe_dai_hw_params+0x9c/0x17c [snd_soc_core] snd_pcm_hw_params+0x124/0x464 [snd_pcm] snd_pcm_common_ioctl+0x110c/0x1820 [snd_pcm] snd_pcm_ioctl+0x34/0x4c [snd_pcm] __arm64_sys_ioctl+0xac/0x104 invoke_syscall+0x48/0x104 el0_svc_common.constprop.0+0x40/0xe0 do_el0_svc+0x1c/0x28 el0_svc+0x34/0xec el0t_64_sync_handler+0xa0/0xf0 el0t_64_sync+0x198/0x19c

The __devm_regmap_init_slimbus() started to be used instead of __regmap_init_slimbus() after the commit mentioned above and turns out the incorrect bus_context pointer (3rd argument) was used in __devm_regmap_init_slimbus(). It should be just "slimbus" (which is equal to &slimbus->dev). Correct it. The wcd934x codec seems to be the only or the first user of devm_regmap_init_slimbus() but we should fix it till the point where __devm_regmap_init_slimbus() was introduced therefore two "Fixes" tags.

While at this, also correct the same argument in __regmap_init_slimbus().

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{
  "affected": [],
  "aliases": [
    "CVE-2025-40317"
  ],
  "database_specific": {
    "cwe_ids": [],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2025-12-08T01:16:04Z",
    "severity": null
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nregmap: slimbus: fix bus_context pointer in regmap init calls\n\nCommit 4e65bda8273c (\"ASoC: wcd934x: fix error handling in\nwcd934x_codec_parse_data()\") revealed the problem in the slimbus regmap.\nThat commit breaks audio playback, for instance, on sdm845 Thundercomm\nDragonboard 845c board:\n\n Unable to handle kernel paging request at virtual address ffff8000847cbad4\n ...\n CPU: 5 UID: 0 PID: 776 Comm: aplay Not tainted 6.18.0-rc1-00028-g7ea30958b305 #11 PREEMPT\n Hardware name: Thundercomm Dragonboard 845c (DT)\n ...\n Call trace:\n  slim_xfer_msg+0x24/0x1ac [slimbus] (P)\n  slim_read+0x48/0x74 [slimbus]\n  regmap_slimbus_read+0x18/0x24 [regmap_slimbus]\n  _regmap_raw_read+0xe8/0x174\n  _regmap_bus_read+0x44/0x80\n  _regmap_read+0x60/0xd8\n  _regmap_update_bits+0xf4/0x140\n  _regmap_select_page+0xa8/0x124\n  _regmap_raw_write_impl+0x3b8/0x65c\n  _regmap_bus_raw_write+0x60/0x80\n  _regmap_write+0x58/0xc0\n  regmap_write+0x4c/0x80\n  wcd934x_hw_params+0x494/0x8b8 [snd_soc_wcd934x]\n  snd_soc_dai_hw_params+0x3c/0x7c [snd_soc_core]\n  __soc_pcm_hw_params+0x22c/0x634 [snd_soc_core]\n  dpcm_be_dai_hw_params+0x1d4/0x38c [snd_soc_core]\n  dpcm_fe_dai_hw_params+0x9c/0x17c [snd_soc_core]\n  snd_pcm_hw_params+0x124/0x464 [snd_pcm]\n  snd_pcm_common_ioctl+0x110c/0x1820 [snd_pcm]\n  snd_pcm_ioctl+0x34/0x4c [snd_pcm]\n  __arm64_sys_ioctl+0xac/0x104\n  invoke_syscall+0x48/0x104\n  el0_svc_common.constprop.0+0x40/0xe0\n  do_el0_svc+0x1c/0x28\n  el0_svc+0x34/0xec\n  el0t_64_sync_handler+0xa0/0xf0\n  el0t_64_sync+0x198/0x19c\n\nThe __devm_regmap_init_slimbus() started to be used instead of\n__regmap_init_slimbus() after the commit mentioned above and turns out\nthe incorrect bus_context pointer (3rd argument) was used in\n__devm_regmap_init_slimbus(). It should be just \"slimbus\" (which is equal\nto \u0026slimbus-\u003edev). Correct it. The wcd934x codec seems to be the only or\nthe first user of devm_regmap_init_slimbus() but we should fix it till\nthe point where __devm_regmap_init_slimbus() was introduced therefore\ntwo \"Fixes\" tags.\n\nWhile at this, also correct the same argument in __regmap_init_slimbus().",
  "id": "GHSA-8c3q-mr36-wh76",
  "modified": "2025-12-08T03:31:01Z",
  "published": "2025-12-08T03:31:01Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2025-40317"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/02d3041caaa3fe4dd69e5a8afd1ac6b918ddc6a1"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/2664bfd8969d1c43dcbe3ea313f130dfa6b74f4c"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/434f7349a1f00618a620b316f091bd13a12bc8d2"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/8143e4075d131c528540417a51966f6697be14eb"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/a16e92f8d7dc7371e68f17a9926cb92d2244be7b"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/b65f3303349eaee333e47d2a99045aa12fa0c3a7"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/c0f05129e5734ff3fd14b2c242709314d9ca5433"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/d979639f099c6e51f06ce4dd8d8e56364d6c17ba"
    }
  ],
  "schema_version": "1.4.0",
  "severity": []
}


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