Entreprise française de cybersécurité depuis 2004
☎ 03 60 47 09 81 - info@securiteinfo.com
☎ 03 60 47 09 81 - info@securiteinfo.com
In the Linux kernel, the following vulnerability has been resolved:fs/proc: do_task_stat: use sig->stats_lock to gather the threads/children statslock_task_sighand() can trigger a hard lockup. If NR_CPUS threads calldo_task_stat() at the same time and the process has NR_THREADS, it willspin with irqs disabled O(NR_CPUS * NR_THREADS) time.Change do_task_stat() to use sig->stats_lock to gather the statisticsoutside of ->siglock protected section, in the likely case this code willrun lockless.
No PoCs from references.
- https://github.com/w4zu/Debian_security