scsi: storvsc: Fix handling of virtual Fibre Channel timeouts

{
  "id": "9afd89c0383c0c4b71f1d8641125a1256ce9f42b1941f2399c2ab1b192b5b7ac",
  "url": "https://osv.dev/vulnerability/CVE-2023-53245",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "scsi: storvsc: Fix handling of virtual Fibre Channel timeouts",
    "summary": "In the Linux kernel, the following vulnerability has been resolved: scsi: storvsc: Fix handling of virtual Fibre Channel timeouts Hyper-V provides the ability to connect Fibre Channel LUNs to the host system and present them in a guest VM as a SCSI device. I/O to the vFC device is handled by the storvsc driver. The storvsc driver includes a partial integration with the FC transport implemented in the generic portion of the Linux SCSI subsystem so that FC attributes can be displayed in /sys. However, the partial integration means that some aspects of vFC don't work properly. Unfortunately, a full and correct integration isn't practical because of limitations in what Hyper-V provides to the guest. In particular, in the context of Hyper-V storvsc, the FC transport timeout function fc_eh_timed_out() causes a kernel panic because it can't find the rport and dereferences a NULL pointer. The original patch that added the call from storvsc_eh_timed_out() to fc_eh_timed_out() is faulty in this regard. In many cases a timeout is due to a transient condition, so the situation can be improved by just continuing to wait like with other I/O requests issued by storvsc, and avoiding the guaranteed panic. For a permanent failure, continuing to wait may result in a hung thread instead of a panic, which again may be better. So fix the panic by removing the storvsc call to fc_eh_timed_out(). This allows storvsc to keep waiting for a response. The change has been tested by users who experienced a",
    "evidence": "osv:CVE-2023-53245",
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      "modified": "2026-10-28T02:30:49.652711483Z",
      "provider": "osv",
      "references": [
        "https://git.kernel.org/stable/c/048ebc9a28fb918ee635dd4b2fcf4248eb6e4050",
        "https://git.kernel.org/stable/c/1678408d08f31a694d5150a56796dd04c9710b22",
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        "https://git.kernel.org/stable/c/311db605e07f0d4fc0cc7ddb74f1e5692ea2f469",
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        "https://github.com/CVEProject/cvelistV5/tree/main/cves/2023/53xxx/CVE-2023-53245.json",
        "https://nvd.nist.gov/vuln/detail/CVE-2023-53245",
        "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"
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  "source_id": "core-osv",
  "document_id": 517717,
  "published_at": "2025-09-15T14:46:14.28+00:00"
}