pinctrl: ocelot: fix system hang on level based interrupts 漏洞信息(CVE-2024-50196)

一、漏洞 CVE-2024-50196 基础信息

漏洞标题

pinctrl: ocelot: 层次中断异常导致系统卡死漏洞

来源：AIGC 神龙大模型

漏洞描述信息

N/A

来源：AIGC 神龙大模型

CVSS信息

CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

来源：AIGC 神龙大模型

漏洞类别

未加控制的资源消耗(资源穷尽)

来源：AIGC 神龙大模型

漏洞标题

pinctrl: ocelot: fix system hang on level based interrupts

来源：美国国家漏洞数据库 NVD

漏洞描述信息

In the Linux kernel, the following vulnerability has been resolved: pinctrl: ocelot: fix system hang on level based interrupts The current implementation only calls chained_irq_enter() and chained_irq_exit() if it detects pending interrupts. ``` for (i = 0; i < info->stride; i++) { uregmap_read(info->map, id_reg + 4 * i, &reg); if (!reg) continue; chained_irq_enter(parent_chip, desc); ``` However, in case of GPIO pin configured in level mode and the parent controller configured in edge mode, GPIO interrupt might be lowered by the hardware. In the result, if the interrupt is short enough, the parent interrupt is still pending while the GPIO interrupt is cleared; chained_irq_enter() never gets called and the system hangs trying to service the parent interrupt. Moving chained_irq_enter() and chained_irq_exit() outside the for loop ensures that they are called even when GPIO interrupt is lowered by the hardware. The similar code with chained_irq_enter() / chained_irq_exit() functions wrapping interrupt checking loop may be found in many other drivers: ``` grep -r -A 10 chained_irq_enter drivers/pinctrl ```

来源：美国国家漏洞数据库 NVD

CVSS信息

N/A

来源：美国国家漏洞数据库 NVD

漏洞类别

N/A

来源：美国国家漏洞数据库 NVD

漏洞标题

Linux kernel 安全漏洞

来源：中国国家信息安全漏洞库 CNNVD

漏洞描述信息

Linux kernel是美国Linux基金会的开源操作系统Linux所使用的内核。 Linux kernel存在安全漏洞，该漏洞源于存在基于级别的中断处理不当问题。

来源：中国国家信息安全漏洞库 CNNVD

CVSS信息

N/A

来源：中国国家信息安全漏洞库 CNNVD

漏洞类别

其他

来源：中国国家信息安全漏洞库 CNNVD

二、漏洞 CVE-2024-50196 的公开POC

#	POC 描述	源链接	神龙链接

三、漏洞 CVE-2024-50196 的情报信息

标题： pinctrl: ocelot: fix system hang on level based interrupts - kernel/git/stable/linux.git - Linux kernel stable tree -- 🔗来源链接

标签：
神龙速读
标题： pinctrl: ocelot: fix system hang on level based interrupts - kernel/git/stable/linux.git - Linux kernel stable tree -- 🔗来源链接

标签：
神龙速读
标题： pinctrl: ocelot: fix system hang on level based interrupts - kernel/git/stable/linux.git - Linux kernel stable tree -- 🔗来源链接

标签：
神龙速读
标题： pinctrl: ocelot: fix system hang on level based interrupts - kernel/git/stable/linux.git - Linux kernel stable tree -- 🔗来源链接

标签：
神龙速读
标题： pinctrl: ocelot: fix system hang on level based interrupts - kernel/git/stable/linux.git - Linux kernel stable tree -- 🔗来源链接

标签：
神龙速读
https://nvd.nist.gov/vuln/detail/CVE-2024-50196