CVE-2024-50249 Affecting kernel-uek-devel package, versions <0:5.15.0-303.171.5.2.el9uek
Threat Intelligence
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Test your applications- Snyk IDSNYK-ORACLE9-KERNELUEKDEVEL-8531083
- published19 Dec 2024
- disclosed9 Nov 2024
Introduced: 9 Nov 2024
CVE-2024-50249 (opens in a new tab)How to fix?
Upgrade Oracle:9 kernel-uek-devel to version 0:5.15.0-303.171.5.2.el9uek or higher.
This issue was patched in ELSA-2024-12887.
NVD Description
Note: Versions mentioned in the description apply only to the upstream kernel-uek-devel package and not the kernel-uek-devel package as distributed by Oracle.
See How to fix? for Oracle:9 relevant fixed versions and status.
In the Linux kernel, the following vulnerability has been resolved:
ACPI: CPPC: Make rmw_lock a raw_spin_lock
The following BUG was triggered:
============================= [ BUG: Invalid wait context ] 6.12.0-rc2-XXX #406 Not tainted
kworker/1:1/62 is trying to lock: ffffff8801593030 (&cpc_ptr->rmw_lock){+.+.}-{3:3}, at: cpc_write+0xcc/0x370 other info that might help us debug this: context-{5:5} 2 locks held by kworker/1:1/62: #0: ffffff897ef5ec98 (&rq->__lock){-.-.}-{2:2}, at: raw_spin_rq_lock_nested+0x2c/0x50 #1: ffffff880154e238 (&sg_policy->update_lock){....}-{2:2}, at: sugov_update_shared+0x3c/0x280 stack backtrace: CPU: 1 UID: 0 PID: 62 Comm: kworker/1:1 Not tainted 6.12.0-rc2-g9654bd3e8806 #406 Workqueue: 0x0 (events) Call trace: dump_backtrace+0xa4/0x130 show_stack+0x20/0x38 dump_stack_lvl+0x90/0xd0 dump_stack+0x18/0x28 __lock_acquire+0x480/0x1ad8 lock_acquire+0x114/0x310 _raw_spin_lock+0x50/0x70 cpc_write+0xcc/0x370 cppc_set_perf+0xa0/0x3a8 cppc_cpufreq_fast_switch+0x40/0xc0 cpufreq_driver_fast_switch+0x4c/0x218 sugov_update_shared+0x234/0x280 update_load_avg+0x6ec/0x7b8 dequeue_entities+0x108/0x830 dequeue_task_fair+0x58/0x408 __schedule+0x4f0/0x1070 schedule+0x54/0x130 worker_thread+0xc0/0x2e8 kthread+0x130/0x148 ret_from_fork+0x10/0x20
sugov_update_shared() locks a raw_spinlock while cpc_write() locks a spinlock.
To have a correct wait-type order, update rmw_lock to a raw spinlock and ensure that interrupts will be disabled on the CPU holding it.
[ rjw: Changelog edits ]
References
- https://linux.oracle.com/cve/CVE-2024-50249.html
- https://linux.oracle.com/errata/ELSA-2024-12887.html
- https://git.kernel.org/stable/c/0eb2b767c42fac61ab23c4063eb456baa4c2c262
- https://git.kernel.org/stable/c/1c10941e34c5fdc0357e46a25bd130d9cf40b925
- https://git.kernel.org/stable/c/23039b4aaf1e82e0feea1060834d4ec34262e453
- https://git.kernel.org/stable/c/43b1df48d1e7000a214acd1a81b8012ca8a929c8
- https://git.kernel.org/stable/c/c46d6b02588000c27b7b869388c2c0278bd0d173