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
