CVE-2023-53094 (GCVE-0-2023-53094)

Vulnerability from cvelistv5 – Published: 2025-05-02 15:55 – Updated: 2025-05-04 12:50
VLAI?
Title
tty: serial: fsl_lpuart: fix race on RX DMA shutdown
Summary
In the Linux kernel, the following vulnerability has been resolved: tty: serial: fsl_lpuart: fix race on RX DMA shutdown From time to time DMA completion can come in the middle of DMA shutdown: <process ctx>: <IRQ>: lpuart32_shutdown() lpuart_dma_shutdown() del_timer_sync() lpuart_dma_rx_complete() lpuart_copy_rx_to_tty() mod_timer() lpuart_dma_rx_free() When the timer fires a bit later, sport->dma_rx_desc is NULL: Unable to handle kernel NULL pointer dereference at virtual address 0000000000000004 pc : lpuart_copy_rx_to_tty+0xcc/0x5bc lr : lpuart_timer_func+0x1c/0x2c Call trace: lpuart_copy_rx_to_tty lpuart_timer_func call_timer_fn __run_timers.part.0 run_timer_softirq __do_softirq __irq_exit_rcu irq_exit handle_domain_irq gic_handle_irq call_on_irq_stack do_interrupt_handler ... To fix this fold del_timer_sync() into lpuart_dma_rx_free() after dmaengine_terminate_sync() to make sure timer will not be re-started in lpuart_copy_rx_to_tty() <= lpuart_dma_rx_complete().
Severity ?
No CVSS data available.
Assigner
References
Impacted products
Vendor Product Version
Linux Linux Affected: 4a8588a1cf867333187d9ff071e6fbdab587d194 , < 19a98d56dfedafb25652bdb9cd48a4e73ceba702 (git)
Affected: 4a8588a1cf867333187d9ff071e6fbdab587d194 , < 90530e7214c8a04dcdde57502d93fa96af288c38 (git)
Affected: 4a8588a1cf867333187d9ff071e6fbdab587d194 , < 954fc9931f0aabf272b5674cf468affdd88d3a36 (git)
Affected: 4a8588a1cf867333187d9ff071e6fbdab587d194 , < 2a36b444cace9580380467fd1183bb5e85bcc80a (git)
Affected: 4a8588a1cf867333187d9ff071e6fbdab587d194 , < 1be6f2b15f902c02e055ae0b419ca789200473c9 (git)
Affected: 5716a781032693d0f812ed06528d98195e9df028 (git)
Affected: 0d5cb6e8b4b62d8efd1a470615894276341d6db9 (git)
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    Linux Linux Affected: 4.0
Unaffected: 0 , < 4.0 (semver)
Unaffected: 5.10.177 , ≤ 5.10.* (semver)
Unaffected: 5.15.105 , ≤ 5.15.* (semver)
Unaffected: 6.1.23 , ≤ 6.1.* (semver)
Unaffected: 6.2.8 , ≤ 6.2.* (semver)
Unaffected: 6.3 , ≤ * (original_commit_for_fix)
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{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/tty/serial/fsl_lpuart.c"
          ],
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          "product": "Linux",
          "programFiles": [
            "drivers/tty/serial/fsl_lpuart.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
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              "version": "0",
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              "version": "5.10.177",
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            },
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              "lessThanOrEqual": "5.15.*",
              "status": "unaffected",
              "version": "5.15.105",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.1.*",
              "status": "unaffected",
              "version": "6.1.23",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.2.*",
              "status": "unaffected",
              "version": "6.2.8",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "6.3",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ntty: serial: fsl_lpuart: fix race on RX DMA shutdown\n\nFrom time to time DMA completion can come in the middle of DMA shutdown:\n\n\u003cprocess ctx\u003e:\t\t\t\t\u003cIRQ\u003e:\nlpuart32_shutdown()\n  lpuart_dma_shutdown()\n    del_timer_sync()\n\t\t\t\t\tlpuart_dma_rx_complete()\n\t\t\t\t\t  lpuart_copy_rx_to_tty()\n\t\t\t\t\t    mod_timer()\n    lpuart_dma_rx_free()\n\nWhen the timer fires a bit later, sport-\u003edma_rx_desc is NULL:\n\nUnable to handle kernel NULL pointer dereference at virtual address 0000000000000004\npc : lpuart_copy_rx_to_tty+0xcc/0x5bc\nlr : lpuart_timer_func+0x1c/0x2c\nCall trace:\n lpuart_copy_rx_to_tty\n lpuart_timer_func\n call_timer_fn\n __run_timers.part.0\n run_timer_softirq\n __do_softirq\n __irq_exit_rcu\n irq_exit\n handle_domain_irq\n gic_handle_irq\n call_on_irq_stack\n do_interrupt_handler\n ...\n\nTo fix this fold del_timer_sync() into lpuart_dma_rx_free() after\ndmaengine_terminate_sync() to make sure timer will not be re-started in\nlpuart_copy_rx_to_tty() \u003c= lpuart_dma_rx_complete()."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2025-05-04T12:50:23.463Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/19a98d56dfedafb25652bdb9cd48a4e73ceba702"
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          "url": "https://git.kernel.org/stable/c/90530e7214c8a04dcdde57502d93fa96af288c38"
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        },
        {
          "url": "https://git.kernel.org/stable/c/1be6f2b15f902c02e055ae0b419ca789200473c9"
        }
      ],
      "title": "tty: serial: fsl_lpuart: fix race on RX DMA shutdown",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2023-53094",
    "datePublished": "2025-05-02T15:55:39.045Z",
    "dateReserved": "2025-05-02T15:51:43.552Z",
    "dateUpdated": "2025-05-04T12:50:23.463Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.1"
}


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