parisc: Increase kernel stack size to 32kb

Overview

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 (THREAD_SIZE_ORDER) 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 wb_workfn (flush-259:0) Backtrace: [<000000004022f050>] show_stack+0x70/0x90 [<000000004022378c>] dump_stack_lvl+0x124/0x190 [<000000004022382c>] dump_stack+0x34/0x48 [<000000004020212c>] vpanic+0x204/0x648 [<00000000402025c4>] panic+0x54/0x58 [<0000000040232230>] do_cpu_irq_mask+0x3f8/0x440 [<0000000040227070>] intr_return+0x0/0xc

Affected

• Linux >= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < 5023c70853ad9829c53d8e9def5ee969b4e1b931
• Linux >= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < db45f02b7a5f753efc9003f616dfb5ee4cb6d077
• Linux >= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < 94b7e3a7e871ae27d4935c76959dfc61829f27f9
• Linux < 6.18.55
• Linux < 7.2.9
• Linux (all versions)

Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.