CVE-2025-38040 (GCVE-0-2025-38040)
Vulnerability from cvelistv5
Published
2025-06-18 09:33
Modified
2025-06-18 09:33
Severity ?
Summary
In the Linux kernel, the following vulnerability has been resolved: serial: mctrl_gpio: split disable_ms into sync and no_sync APIs The following splat has been observed on a SAMA5D27 platform using atmel_serial: BUG: sleeping function called from invalid context at kernel/irq/manage.c:738 in_atomic(): 1, irqs_disabled(): 128, non_block: 0, pid: 27, name: kworker/u5:0 preempt_count: 1, expected: 0 INFO: lockdep is turned off. irq event stamp: 0 hardirqs last enabled at (0): [<00000000>] 0x0 hardirqs last disabled at (0): [<c01588f0>] copy_process+0x1c4c/0x7bec softirqs last enabled at (0): [<c0158944>] copy_process+0x1ca0/0x7bec softirqs last disabled at (0): [<00000000>] 0x0 CPU: 0 UID: 0 PID: 27 Comm: kworker/u5:0 Not tainted 6.13.0-rc7+ #74 Hardware name: Atmel SAMA5 Workqueue: hci0 hci_power_on [bluetooth] Call trace: unwind_backtrace from show_stack+0x18/0x1c show_stack from dump_stack_lvl+0x44/0x70 dump_stack_lvl from __might_resched+0x38c/0x598 __might_resched from disable_irq+0x1c/0x48 disable_irq from mctrl_gpio_disable_ms+0x74/0xc0 mctrl_gpio_disable_ms from atmel_disable_ms.part.0+0x80/0x1f4 atmel_disable_ms.part.0 from atmel_set_termios+0x764/0x11e8 atmel_set_termios from uart_change_line_settings+0x15c/0x994 uart_change_line_settings from uart_set_termios+0x2b0/0x668 uart_set_termios from tty_set_termios+0x600/0x8ec tty_set_termios from ttyport_set_flow_control+0x188/0x1e0 ttyport_set_flow_control from wilc_setup+0xd0/0x524 [hci_wilc] wilc_setup [hci_wilc] from hci_dev_open_sync+0x330/0x203c [bluetooth] hci_dev_open_sync [bluetooth] from hci_dev_do_open+0x40/0xb0 [bluetooth] hci_dev_do_open [bluetooth] from hci_power_on+0x12c/0x664 [bluetooth] hci_power_on [bluetooth] from process_one_work+0x998/0x1a38 process_one_work from worker_thread+0x6e0/0xfb4 worker_thread from kthread+0x3d4/0x484 kthread from ret_from_fork+0x14/0x28 This warning is emitted when trying to toggle, at the highest level, some flow control (with serdev_device_set_flow_control) in a device driver. At the lowest level, the atmel_serial driver is using serial_mctrl_gpio lib to enable/disable the corresponding IRQs accordingly. The warning emitted by CONFIG_DEBUG_ATOMIC_SLEEP is due to disable_irq (called in mctrl_gpio_disable_ms) being possibly called in some atomic context (some tty drivers perform modem lines configuration in regions protected by port lock). Split mctrl_gpio_disable_ms into two differents APIs, a non-blocking one and a blocking one. Replace mctrl_gpio_disable_ms calls with the relevant version depending on whether the call is protected by some port lock.
References
Impacted products
Vendor Product Version
Linux Linux Version: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2
Version: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2
Version: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2
Version: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2
Version: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2
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{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "Documentation/driver-api/serial/driver.rst",
            "drivers/tty/serial/8250/8250_port.c",
            "drivers/tty/serial/atmel_serial.c",
            "drivers/tty/serial/imx.c",
            "drivers/tty/serial/serial_mctrl_gpio.c",
            "drivers/tty/serial/serial_mctrl_gpio.h",
            "drivers/tty/serial/sh-sci.c",
            "drivers/tty/serial/stm32-usart.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "68435c1fa3db696db4f480385db9e50e26691d0d",
              "status": "affected",
              "version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2",
              "versionType": "git"
            },
            {
              "lessThan": "c504c11b94d6e4ad818ca5578dffa8ff29ad0f20",
              "status": "affected",
              "version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2",
              "versionType": "git"
            },
            {
              "lessThan": "e6a46719a2369eb5186d4f7e6c0478720ca1ec3d",
              "status": "affected",
              "version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2",
              "versionType": "git"
            },
            {
              "lessThan": "7187ec6b0b9ff22ebac2c3bb4178b7dbbdc0a55a",
              "status": "affected",
              "version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2",
              "versionType": "git"
            },
            {
              "lessThan": "1bd2aad57da95f7f2d2bb52f7ad15c0f4993a685",
              "status": "affected",
              "version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "Documentation/driver-api/serial/driver.rst",
            "drivers/tty/serial/8250/8250_port.c",
            "drivers/tty/serial/atmel_serial.c",
            "drivers/tty/serial/imx.c",
            "drivers/tty/serial/serial_mctrl_gpio.c",
            "drivers/tty/serial/serial_mctrl_gpio.h",
            "drivers/tty/serial/sh-sci.c",
            "drivers/tty/serial/stm32-usart.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThanOrEqual": "6.1.*",
              "status": "unaffected",
              "version": "6.1.141",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.6.*",
              "status": "unaffected",
              "version": "6.6.93",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.12.*",
              "status": "unaffected",
              "version": "6.12.31",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.14.*",
              "status": "unaffected",
              "version": "6.14.9",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "6.15",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.1.141",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.6.93",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.12.31",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.14.9",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.15",
                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nserial: mctrl_gpio: split disable_ms into sync and no_sync APIs\n\nThe following splat has been observed on a SAMA5D27 platform using\natmel_serial:\n\nBUG: sleeping function called from invalid context at kernel/irq/manage.c:738\nin_atomic(): 1, irqs_disabled(): 128, non_block: 0, pid: 27, name: kworker/u5:0\npreempt_count: 1, expected: 0\nINFO: lockdep is turned off.\nirq event stamp: 0\nhardirqs last  enabled at (0): [\u003c00000000\u003e] 0x0\nhardirqs last disabled at (0): [\u003cc01588f0\u003e] copy_process+0x1c4c/0x7bec\nsoftirqs last  enabled at (0): [\u003cc0158944\u003e] copy_process+0x1ca0/0x7bec\nsoftirqs last disabled at (0): [\u003c00000000\u003e] 0x0\nCPU: 0 UID: 0 PID: 27 Comm: kworker/u5:0 Not tainted 6.13.0-rc7+ #74\nHardware name: Atmel SAMA5\nWorkqueue: hci0 hci_power_on [bluetooth]\nCall trace:\n  unwind_backtrace from show_stack+0x18/0x1c\n  show_stack from dump_stack_lvl+0x44/0x70\n  dump_stack_lvl from __might_resched+0x38c/0x598\n  __might_resched from disable_irq+0x1c/0x48\n  disable_irq from mctrl_gpio_disable_ms+0x74/0xc0\n  mctrl_gpio_disable_ms from atmel_disable_ms.part.0+0x80/0x1f4\n  atmel_disable_ms.part.0 from atmel_set_termios+0x764/0x11e8\n  atmel_set_termios from uart_change_line_settings+0x15c/0x994\n  uart_change_line_settings from uart_set_termios+0x2b0/0x668\n  uart_set_termios from tty_set_termios+0x600/0x8ec\n  tty_set_termios from ttyport_set_flow_control+0x188/0x1e0\n  ttyport_set_flow_control from wilc_setup+0xd0/0x524 [hci_wilc]\n  wilc_setup [hci_wilc] from hci_dev_open_sync+0x330/0x203c [bluetooth]\n  hci_dev_open_sync [bluetooth] from hci_dev_do_open+0x40/0xb0 [bluetooth]\n  hci_dev_do_open [bluetooth] from hci_power_on+0x12c/0x664 [bluetooth]\n  hci_power_on [bluetooth] from process_one_work+0x998/0x1a38\n  process_one_work from worker_thread+0x6e0/0xfb4\n  worker_thread from kthread+0x3d4/0x484\n  kthread from ret_from_fork+0x14/0x28\n\nThis warning is emitted when trying to toggle, at the highest level,\nsome flow control (with serdev_device_set_flow_control) in a device\ndriver. At the lowest level, the atmel_serial driver is using\nserial_mctrl_gpio lib to enable/disable the corresponding IRQs\naccordingly.  The warning emitted by CONFIG_DEBUG_ATOMIC_SLEEP is due to\ndisable_irq (called in mctrl_gpio_disable_ms) being possibly called in\nsome atomic context (some tty drivers perform modem lines configuration\nin regions protected by port lock).\n\nSplit mctrl_gpio_disable_ms into two differents APIs, a non-blocking one\nand a blocking one. Replace mctrl_gpio_disable_ms calls with the\nrelevant version depending on whether the call is protected by some port\nlock."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2025-06-18T09:33:25.720Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/68435c1fa3db696db4f480385db9e50e26691d0d"
        },
        {
          "url": "https://git.kernel.org/stable/c/c504c11b94d6e4ad818ca5578dffa8ff29ad0f20"
        },
        {
          "url": "https://git.kernel.org/stable/c/e6a46719a2369eb5186d4f7e6c0478720ca1ec3d"
        },
        {
          "url": "https://git.kernel.org/stable/c/7187ec6b0b9ff22ebac2c3bb4178b7dbbdc0a55a"
        },
        {
          "url": "https://git.kernel.org/stable/c/1bd2aad57da95f7f2d2bb52f7ad15c0f4993a685"
        }
      ],
      "title": "serial: mctrl_gpio: split disable_ms into sync and no_sync APIs",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2025-38040",
    "datePublished": "2025-06-18T09:33:25.720Z",
    "dateReserved": "2025-04-16T04:51:23.978Z",
    "dateUpdated": "2025-06-18T09:33:25.720Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.1",
  "vulnerability-lookup:meta": {
    "nvd": "{\"cve\":{\"id\":\"CVE-2025-38040\",\"sourceIdentifier\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"published\":\"2025-06-18T10:15:36.400\",\"lastModified\":\"2025-06-18T13:46:52.973\",\"vulnStatus\":\"Awaiting Analysis\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"In the Linux kernel, the following vulnerability has been resolved:\\n\\nserial: mctrl_gpio: split disable_ms into sync and no_sync APIs\\n\\nThe following splat has been observed on a SAMA5D27 platform using\\natmel_serial:\\n\\nBUG: sleeping function called from invalid context at kernel/irq/manage.c:738\\nin_atomic(): 1, irqs_disabled(): 128, non_block: 0, pid: 27, name: kworker/u5:0\\npreempt_count: 1, expected: 0\\nINFO: lockdep is turned off.\\nirq event stamp: 0\\nhardirqs last  enabled at (0): [\u003c00000000\u003e] 0x0\\nhardirqs last disabled at (0): [\u003cc01588f0\u003e] copy_process+0x1c4c/0x7bec\\nsoftirqs last  enabled at (0): [\u003cc0158944\u003e] copy_process+0x1ca0/0x7bec\\nsoftirqs last disabled at (0): [\u003c00000000\u003e] 0x0\\nCPU: 0 UID: 0 PID: 27 Comm: kworker/u5:0 Not tainted 6.13.0-rc7+ #74\\nHardware name: Atmel SAMA5\\nWorkqueue: hci0 hci_power_on [bluetooth]\\nCall trace:\\n  unwind_backtrace from show_stack+0x18/0x1c\\n  show_stack from dump_stack_lvl+0x44/0x70\\n  dump_stack_lvl from __might_resched+0x38c/0x598\\n  __might_resched from disable_irq+0x1c/0x48\\n  disable_irq from mctrl_gpio_disable_ms+0x74/0xc0\\n  mctrl_gpio_disable_ms from atmel_disable_ms.part.0+0x80/0x1f4\\n  atmel_disable_ms.part.0 from atmel_set_termios+0x764/0x11e8\\n  atmel_set_termios from uart_change_line_settings+0x15c/0x994\\n  uart_change_line_settings from uart_set_termios+0x2b0/0x668\\n  uart_set_termios from tty_set_termios+0x600/0x8ec\\n  tty_set_termios from ttyport_set_flow_control+0x188/0x1e0\\n  ttyport_set_flow_control from wilc_setup+0xd0/0x524 [hci_wilc]\\n  wilc_setup [hci_wilc] from hci_dev_open_sync+0x330/0x203c [bluetooth]\\n  hci_dev_open_sync [bluetooth] from hci_dev_do_open+0x40/0xb0 [bluetooth]\\n  hci_dev_do_open [bluetooth] from hci_power_on+0x12c/0x664 [bluetooth]\\n  hci_power_on [bluetooth] from process_one_work+0x998/0x1a38\\n  process_one_work from worker_thread+0x6e0/0xfb4\\n  worker_thread from kthread+0x3d4/0x484\\n  kthread from ret_from_fork+0x14/0x28\\n\\nThis warning is emitted when trying to toggle, at the highest level,\\nsome flow control (with serdev_device_set_flow_control) in a device\\ndriver. At the lowest level, the atmel_serial driver is using\\nserial_mctrl_gpio lib to enable/disable the corresponding IRQs\\naccordingly.  The warning emitted by CONFIG_DEBUG_ATOMIC_SLEEP is due to\\ndisable_irq (called in mctrl_gpio_disable_ms) being possibly called in\\nsome atomic context (some tty drivers perform modem lines configuration\\nin regions protected by port lock).\\n\\nSplit mctrl_gpio_disable_ms into two differents APIs, a non-blocking one\\nand a blocking one. Replace mctrl_gpio_disable_ms calls with the\\nrelevant version depending on whether the call is protected by some port\\nlock.\"},{\"lang\":\"es\",\"value\":\"En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: serial: mctrl_gpio: divide disabled_ms en API sync y no_sync Se ha observado el siguiente splat en una plataforma SAMA5D27 usando atmel_serial: BUG: funci\u00f3n inactiva llamada desde un contexto no v\u00e1lido en kernel/irq/manage.c:738 in_atomic(): 1, irqs_disabled(): 128, non_block: 0, pid: 27, name: kworker/u5:0 preempt_count: 1, expected: 0 INFO: lockdep est\u00e1 desactivado. Marca de evento irq: 0 hardirqs habilitados por \u00faltima vez en (0): [\u0026lt;00000000\u0026gt;] 0x0 hardirqs deshabilitados por \u00faltima vez en (0): [] copy_process+0x1c4c/0x7bec softirqs habilitados por \u00faltima vez en (0): [] copy_process+0x1ca0/0x7bec softirqs deshabilitados por \u00faltima vez en (0): [\u0026lt;00000000\u0026gt;] 0x0 CPU: 0 UID: 0 PID: 27 Comm: kworker/u5:0 No contaminado 6.13.0-rc7+ #74 Nombre del hardware: Atmel SAMA5 Cola de trabajo: hci0 hci_power_on [bluetooth] Rastreo de llamadas: unwind_backtrace from show_stack+0x18/0x1c show_stack from dump_stack_lvl+0x44/0x70 dump_stack_lvl from __might_resched+0x38c/0x598 __might_resched from disable_irq+0x1c/0x48 disable_irq from mctrl_gpio_disable_ms+0x74/0xc0 mctrl_gpio_disable_ms from atmel_disable_ms.part.0+0x80/0x1f4 atmel_disable_ms.part.0 from atmel_set_termios+0x764/0x11e8 atmel_set_termios from uart_change_line_settings+0x15c/0x994 uart_change_line_settings from uart_set_termios+0x2b0/0x668 uart_set_termios from tty_set_termios+0x600/0x8ec tty_set_termios from ttyport_set_flow_control+0x188/0x1e0 ttyport_set_flow_control from wilc_setup+0xd0/0x524 [hci_wilc] wilc_setup [hci_wilc] from hci_dev_open_sync+0x330/0x203c [bluetooth] hci_dev_open_sync [bluetooth] from hci_dev_do_open+0x40/0xb0 [bluetooth] hci_dev_do_open [bluetooth] from hci_power_on+0x12c/0x664 [bluetooth] hci_power_on [bluetooth] from process_one_work+0x998/0x1a38 process_one_work from worker_thread+0x6e0/0xfb4 worker_thread from kthread+0x3d4/0x484 kthread from ret_from_fork+0x14/0x28 Esta advertencia se emite al intentar alternar, en el nivel m\u00e1s alto, alg\u00fan control de flujo (con serdev_device_set_flow_control) en un controlador de dispositivo. En el nivel m\u00e1s bajo, el controlador atmel_serial est\u00e1 usando la librer\u00eda serial_mctrl_gpio para habilitar/deshabilitar las IRQ correspondientes seg\u00fan corresponda. La advertencia emitida por CONFIG_DEBUG_ATOMIC_SLEEP se debe a que la funci\u00f3n disabled_irq (llamada en mctrl_gpio_disable_ms) posiblemente se llama en alg\u00fan contexto at\u00f3mico (algunos controladores tty realizan la configuraci\u00f3n de l\u00edneas de m\u00f3dem en regiones protegidas por bloqueo de puerto). Divida mctrl_gpio_disable_ms en dos API diferentes, una sin bloqueo y otra con bloqueo. Reemplace las llamadas a mctrl_gpio_disable_ms con la versi\u00f3n relevante dependiendo de si la llamada est\u00e1 protegida por alg\u00fan bloqueo de puerto.\"}],\"metrics\":{},\"references\":[{\"url\":\"https://git.kernel.org/stable/c/1bd2aad57da95f7f2d2bb52f7ad15c0f4993a685\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/68435c1fa3db696db4f480385db9e50e26691d0d\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/7187ec6b0b9ff22ebac2c3bb4178b7dbbdc0a55a\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/c504c11b94d6e4ad818ca5578dffa8ff29ad0f20\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/e6a46719a2369eb5186d4f7e6c0478720ca1ec3d\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"}]}}"
  }
}


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