CVE-2024-50249 (GCVE-0-2024-50249)
Vulnerability from cvelistv5
Published
2024-11-09 10:14
Modified
2026-05-23 15:54
Severity ?
5.5 (Medium) - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Summary
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
Impacted products
Vendor Product Version
Linux Linux Version: 94e8c988468dafde1d2bfe0532a60a3117f6394b
Version: f812ca13a0d3e3aa418da36b66ca40df0d6f9e60
Version: 8ad28208be7bbe748e90442c45963ddbef0fd1e2
Version: 20cde05aa8bcd7a5ff36a609d813189b7cdbe692
Version: 60949b7b805424f21326b450ca4f1806c06d982e
Version: 82cee12ada68dfd438c7faca152dbfe042868743
Version: 6.10.13   ≤
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   Linux Linux Version: 5.15.168   ≤
Version: 6.1.113   ≤
Version: 6.6.54   ≤
Version: 6.11.2   ≤
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          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nACPI: CPPC: Make rmw_lock a raw_spin_lock\n\nThe following BUG was triggered:\n\n=============================\n[ BUG: Invalid wait context ]\n6.12.0-rc2-XXX #406 Not tainted\n-----------------------------\nkworker/1:1/62 is trying to lock:\nffffff8801593030 (\u0026cpc_ptr-\u003ermw_lock){+.+.}-{3:3}, at: cpc_write+0xcc/0x370\nother info that might help us debug this:\ncontext-{5:5}\n2 locks held by kworker/1:1/62:\n  #0: ffffff897ef5ec98 (\u0026rq-\u003e__lock){-.-.}-{2:2}, at: raw_spin_rq_lock_nested+0x2c/0x50\n  #1: ffffff880154e238 (\u0026sg_policy-\u003eupdate_lock){....}-{2:2}, at: sugov_update_shared+0x3c/0x280\nstack backtrace:\nCPU: 1 UID: 0 PID: 62 Comm: kworker/1:1 Not tainted 6.12.0-rc2-g9654bd3e8806 #406\nWorkqueue:  0x0 (events)\nCall trace:\n  dump_backtrace+0xa4/0x130\n  show_stack+0x20/0x38\n  dump_stack_lvl+0x90/0xd0\n  dump_stack+0x18/0x28\n  __lock_acquire+0x480/0x1ad8\n  lock_acquire+0x114/0x310\n  _raw_spin_lock+0x50/0x70\n  cpc_write+0xcc/0x370\n  cppc_set_perf+0xa0/0x3a8\n  cppc_cpufreq_fast_switch+0x40/0xc0\n  cpufreq_driver_fast_switch+0x4c/0x218\n  sugov_update_shared+0x234/0x280\n  update_load_avg+0x6ec/0x7b8\n  dequeue_entities+0x108/0x830\n  dequeue_task_fair+0x58/0x408\n  __schedule+0x4f0/0x1070\n  schedule+0x54/0x130\n  worker_thread+0xc0/0x2e8\n  kthread+0x130/0x148\n  ret_from_fork+0x10/0x20\n\nsugov_update_shared() locks a raw_spinlock while cpc_write() locks a\nspinlock.\n\nTo have a correct wait-type order, update rmw_lock to a raw spinlock and\nensure that interrupts will be disabled on the CPU holding it.\n\n[ rjw: Changelog edits ]"
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