CVE - CVE-2024-50196

CVE-ID
CVE-2024-50196	Learn more at National Vulnerability Database (NVD) • CVSS Severity Rating • Fix Information • Vulnerable Software Versions • SCAP Mappings • CPE Information
Description
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 ```
References
Note: References are provided for the convenience of the reader to help distinguish between vulnerabilities. The list is not intended to be complete.
MISC:https://git.kernel.org/stable/c/20728e86289ab463b99b7ab4425515bd26aba417 URL:https://git.kernel.org/stable/c/20728e86289ab463b99b7ab4425515bd26aba417 MISC:https://git.kernel.org/stable/c/4a81800ef05bea5a9896f199677f7b7f5020776a URL:https://git.kernel.org/stable/c/4a81800ef05bea5a9896f199677f7b7f5020776a MISC:https://git.kernel.org/stable/c/655f5d4662b958122b260be05aa6dfdf8768efe6 URL:https://git.kernel.org/stable/c/655f5d4662b958122b260be05aa6dfdf8768efe6 MISC:https://git.kernel.org/stable/c/93b8ddc54507a227087c60a0013ed833b6ae7d3c URL:https://git.kernel.org/stable/c/93b8ddc54507a227087c60a0013ed833b6ae7d3c MISC:https://git.kernel.org/stable/c/dcbe9954634807ec54e22bde278b5b269f921381 URL:https://git.kernel.org/stable/c/dcbe9954634807ec54e22bde278b5b269f921381
Assigning CNA
kernel.org
Date Record Created
20241021	Disclaimer: The record creation date may reflect when the CVE ID was allocated or reserved, and does not necessarily indicate when this vulnerability was discovered, shared with the affected vendor, publicly disclosed, or updated in CVE.
Phase (Legacy)
Assigned (20241021)
Votes (Legacy)

Comments (Legacy)

Proposed (Legacy)
N/A
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