https://vulnerability.circl.lu Contains only the most 10 recent entries. http://www.rssboard.org/rss-specification python-feedgen en Thu, 01 Oct 2026 05:16:59 +0000 https://vulnerability.circl.lu/vuln/cve-2024-49976 <p><strong>Affected:</strong> Linux</p> <p>In the Linux kernel, the following vulnerability has been resolved:</p> <p>tracing/timerlat: Drop interface_lock in stop_kthread()</p> <p>stop_kthread() is the offline callback for &#34;trace/osnoise:online&#34;, since commit 5bfbcd1ee57b (&#34;tracing/timerlat: Add interface_lock around clearing of kthread in stop_kthread()&#34;), the following ABBA deadlock scenario is introduced:</p> <p>T1 | T2 [BP] | T3 [AP] osnoise_hotplug_workfn() | work_for_cpu_fn() | cpuhp_thread_fun() | _cpu_down() | osnoise_cpu_die() mutex_lock(&amp;interface_lock) | | stop_kthread() | cpus_write_lock() | mutex_lock(&amp;interface_lock) cpus_read_lock() | cpuhp_kick_ap() |</p> <p>As the interface_lock here in just for protecting the &#34;kthread&#34; field of the osn_var, use xchg() instead to fix this issue. Also use for_each_online_cpu() back in stop_per_cpu_kthreads() as it can take cpu_read_lock() again.</p> <p><strong>Affected:</strong> Linux</p> <p>In the Linux kernel, the following vulnerability has been resolved:</p> <p>tracing/timerlat: Drop interface_lock in stop_kthread()</p> <p>stop_kthread() is the offline callback for &#34;trace/osnoise:online&#34;, since commit 5bfbcd1ee57b (&#34;tracing/timerlat: Add interface_lock around clearing of kthread in stop_kthread()&#34;), the following ABBA deadlock scenario is introduced:</p> <p>T1 | T2 [BP] | T3 [AP] osnoise_hotplug_workfn() | work_for_cpu_fn() | cpuhp_thread_fun() | _cpu_down() | osnoise_cpu_die() mutex_lock(&amp;interface_lock) | | stop_kthread() | cpus_write_lock() | mutex_lock(&amp;interface_lock) cpus_read_lock() | cpuhp_kick_ap() |</p> <p>As the interface_lock here in just for protecting the &#34;kthread&#34; field of the osn_var, use xchg() instead to fix this issue. Also use for_each_online_cpu() back in stop_per_cpu_kthreads() as it can take cpu_read_lock() again.</p> https://vulnerability.circl.lu/vuln/cve-2024-49976