CVE-2026-98917: parisc: Increase kernel stack size to 32kb
In the Linux kernel, the following vulnerability has been resolved:
parisc: Increase kernel stack size to 32kb
For 64-bit Linux kernels, increase the default kernel stack size (THREADSIZEORDER) to 32 kB, in order to avoid kernel crashes which have been triggered recently when building the debian vtk9 package with gcc 17:
stackcheck: kworker/u128:0 will most likely overflow kernel stack (sp:179a83af0, stk bottom-top:179a80000-179a84000) Kernel panic - not syncing: low stack detected by irq handler - check messages CPU: 2 UID: 0 PID: 30760 Comm: kworker/u128:0 Tainted: G W 6.18.46-dirty #1 NONE Tainted: [W]=WARN Hardware name: 9000/800/rp3440 Workqueue: writeback wbworkfn (flush-259:0) Backtrace: [<000000004022f050>] showstack+0x70/0x90 [<000000004022378c>] dumpstacklvl+0x124/0x190 [<000000004022382c>] dumpstack+0x34/0x48 [<000000004020212c>] vpanic+0x204/0x648 [<00000000402025c4>] panic+0x54/0x58 [<0000000040232230>] docpuirqmask+0x3f8/0x440 [<0000000040227070>] intrreturn+0x0/0xc
Affected Software
Remediation
Recommended actions to resolve this vulnerability, in priority order.
- Configuration
For 64-bit Linux kernels, increase the default kernel stack size by setting THREAD_SIZE_ORDER to 32 kB.
Linux kernel on PA-RISC THREAD_SIZE_ORDER = 32 kB