CVE-2024-56621

In the Linux kernel, the following vulnerability has been resolved: scsi: ufs: core: Cancel RTC work during ufshcd_remove() Currently, RTC work is only cancelled during __ufshcd_wl_suspend(). When ufshcd is removed in ufshcd_remove(), RTC work is not cancelled. Due to this, any further trigger of the RTC work after ufshcd_remove() would result in a NULL pointer dereference as below: Unable to handle kernel NULL pointer dereference at virtual address 00000000000002a4 Workqueue: events ufshcd_rtc_work Call trace: _raw_spin_lock_irqsave+0x34/0x8c pm_runtime_get_if_active+0x24/0xb4 ufshcd_rtc_work+0x124/0x19c process_scheduled_works+0x18c/0x2d8 worker_thread+0x144/0x280 kthread+0x11c/0x128 ret_from_fork+0x10/0x20 Since RTC work accesses the ufshcd internal structures, it should be cancelled when ufshcd is removed. So do that in ufshcd_remove(), as per the order in ufshcd_init().

The following products are affected by CVE-2024-56621 vulnerability.

Here, you will find a curated list of external links that provide in-depth information to CVE-2024-56621.

URL	Resource
https://git.kernel.org/stable/c/1695c4361d35b7bdadd7b34f99c9c07741e181e5
https://git.kernel.org/stable/c/2e7a3bb0331efb292e0fb022c36bc592137f0520
https://git.kernel.org/stable/c/57479e37d3f69efee2f0678568274db773284bc8
https://lore.kernel.org/linux-cve-announce/2024122710-CVE-2024-56621-98bf@gregkh/T
https://nvd.nist.gov/vuln/detail/CVE-2024-56621
https://www.cve.org/CVERecord?id=CVE-2024-56621