CVE-2023-52932

In the Linux kernel, the following vulnerability has been resolved: mm/swapfile: add cond_resched() in get_swap_pages() The softlockup still occurs in get_swap_pages() under memory pressure. 64 CPU cores, 64GB memory, and 28 zram devices, the disksize of each zram device is 50MB with same priority as si. Use the stress-ng tool to increase memory pressure, causing the system to oom frequently. The plist_for_each_entry_safe() loops in get_swap_pages() could reach tens of thousands of times to find available space (extreme case: cond_resched() is not called in scan_swap_map_slots()). Let's add cond_resched() into get_swap_pages() when failed to find available space to avoid softlockup.

• linux linux kernel (< 4.14.306) • linux linux kernel (>= 4.15 < 4.19.273) • linux linux kernel (>= 4.20 < 5.4.232) • linux linux kernel (>= 5.5 < 5.10.168) • linux linux kernel (>= 5.11 < 5.15.93) • linux linux kernel (>= 5.16 < 6.1.11) • linux linux kernel 6.2