In the Linux kernel, the following vulnerability has been resolved: HID: i2c-hid: remove I2C_HID_READ_PENDING flag to prevent lock-up The flag I2C_HID_READ_PENDING is used to serialize I2C operations. However, this is not necessary, because I2C core already has its own locking for that. More importantly, this flag can cause a lock-up: if the flag is set in i2c_hid_xfer() and an interrupt happens, the interrupt handler (i2c_hid_irq) will check this flag and return immediately without doing anything, then the interrupt handler will be invoked again in an infinite loop. Since interrupt handler is an RT task, it takes over the CPU and the flag-clearing task never gets scheduled, thus we have a lock-up. Delete this unnecessary flag.
History

No history.

cve-icon MITRE

Status: PUBLISHED

Assigner: Linux

Published: 2024-05-20T09:48:00.363Z

Updated: 2024-12-19T08:59:53.917Z

Reserved: 2024-05-17T13:50:33.148Z

Link: CVE-2024-35997

cve-icon Vulnrichment

Updated: 2024-08-02T03:30:12.481Z

cve-icon NVD

Status : Modified

Published: 2024-05-20T10:15:13.960

Modified: 2024-11-21T09:21:23.627

Link: CVE-2024-35997

cve-icon Redhat

Severity : Low

Publid Date: 2024-05-20T00:00:00Z

Links: CVE-2024-35997 - Bugzilla