[PATCH v2] powerpc/irq: Increase stack_overflow detection limit when KASAN is enabled

[Michael Ellerman]

On Fri, 3 Jun 2022 15:08:14 +0200, Christophe Leroy wrote:
> When KASAN is enabled, as shown by the Oops below, the 2k limit is not
> enough to allow stack dump after a stack overflow detection when
> CONFIG_DEBUG_STACKOVERFLOW is selected:
> 
> 	do_IRQ: stack overflow: 1984
> 	CPU: 0 PID: 126 Comm: systemd-udevd Not tainted 5.18.0-gentoo-PMacG4 #1
> 	Call Trace:
> 	Oops: Kernel stack overflow, sig: 11 [#1]
> 	BE PAGE_SIZE=4K MMU=Hash SMP NR_CPUS=2 PowerMac
> 	Modules linked in: sr_mod cdrom radeon(+) ohci_pci(+) hwmon i2c_algo_bit drm_ttm_helper ttm drm_dp_helper snd_aoa_i2sbus snd_aoa_soundbus snd_pcm ehci_pci snd_timer ohci_hcd snd ssb ehci_hcd 8250_pci soundcore drm_kms_helper pcmcia 8250 pcmcia_core syscopyarea usbcore sysfillrect 8250_base sysimgblt serial_mctrl_gpio fb_sys_fops usb_common pkcs8_key_parser fuse drm drm_panel_orientation_quirks configfs
> 	CPU: 0 PID: 126 Comm: systemd-udevd Not tainted 5.18.0-gentoo-PMacG4 #1
> 	NIP:  c02e5558 LR: c07eb3bc CTR: c07f46a8
> 	REGS: e7fe9f50 TRAP: 0000   Not tainted  (5.18.0-gentoo-PMacG4)
> 	MSR:  00001032 <ME,IR,DR,RI>  CR: 44a14824  XER: 20000000
> 
> [...]

Applied to powerpc/next.

[1/1] powerpc/irq: Increase stack_overflow detection limit when KASAN is enabled
      https://git.kernel.org/powerpc/c/41f20d6db2b64677225bb0b97df956241c353ef8

cheers