CVE-2024-56621

Description

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().

Reserved 2024-12-27 | Published 2024-12-27 | Updated 2024-12-27 | Assigner Linux

Product status

Default status
unaffected

6bf999e0eb41850d5c857102535d5c53b2ede224 before 2e7a3bb0331efb292e0fb022c36bc592137f0520
affected

6bf999e0eb41850d5c857102535d5c53b2ede224 before 1695c4361d35b7bdadd7b34f99c9c07741e181e5
affected

Default status
affected

6.8
affected

Any version before 6.8
unaffected

6.12.5
unaffected

6.13-rc2
unaffected

References

git.kernel.org/...c/2e7a3bb0331efb292e0fb022c36bc592137f0520

git.kernel.org/...c/1695c4361d35b7bdadd7b34f99c9c07741e181e5

cve.org (CVE-2024-56621)

nvd.nist.gov (CVE-2024-56621)

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