https://bugzilla.kernel.org/show_bug.cgi?id=215389
--- Comment #22 from Erhard F. (erhar...@mailbox.org) --- Created attachment 300977 --> https://bugzilla.kernel.org/attachment.cgi?id=300977&action=edit dmesg (5.18-rc6, CONFIG_LOWMEM_SIZE=0x28000000, outline KASAN, PowerMac G4 DP) I increased THREAD_SHIFT to 14 and used outline KASAN still with CONFIG_LOWMEM_SIZE=0x28000000. The memory corruption output looks slightly different (but not much): [...] pagealloc: memory corruption f5fcfff0: 00 00 00 00 .... CPU: 1 PID: 29742 Comm: ld.so.1 Not tainted 5.18.0-rc6-PMacG4 #7 Call Trace: [eea3ba90] [c09890d4] dump_stack_lvl+0x80/0xc0 (unreliable) [eea3bab0] [c03cce40] __kernel_unpoison_pages+0x208/0x250 [eea3bb00] [c03a2e48] post_alloc_hook+0x108/0x144 [eea3bb30] [c03a66e0] get_page_from_freelist+0x9d4/0x12dc [eea3bc70] [c03a7ad0] __alloc_pages+0x23c/0x1570 [eea3bde0] [c0379c8c] handle_mm_fault+0x610/0x1240 [eea3bed0] [c002e2d4] ___do_page_fault+0x19c/0x850 [eea3bf10] [c002ebbc] do_page_fault+0x28/0x5c [eea3bf30] [c000433c] DataAccess_virt+0x124/0x17c --- interrupt: 300 at 0x6fe0338c NIP: 6fe0338c LR: 6fe032c4 CTR: 6fe033e0 REGS: eea3bf40 TRAP: 0300 Not tainted (5.18.0-rc6-PMacG4) MSR: 0000d032 <EE,PR,ME,IR,DR,RI> CR: 48002262 XER: 20000000 DAR: 046a5000 DSISR: 42000000 GPR00: 6ffbcb94 afc45940 a7c95560 046a4fe4 8a000000 000127e0 03e59a8b 00000003 GPR08: 046a5004 046a5000 04621cfc 6fe03170 6fe032c4 6ffece34 00000000 6ffef34d GPR16: 02dea020 04416750 00000003 01f8cbec 02de9fa0 01f8c660 00000000 00000000 GPR24: afc45aa0 6ffef37c afc45a18 04678c7c 0007630c 04678c7c 6ff76ff4 045f5990 NIP [6fe0338c] 0x6fe0338c LR [6fe032c4] 0x6fe032c4 --- interrupt: 300 page:e739d6ec refcount:1 mapcount:0 mapping:00000000 index:0x1 pfn:0x290a3 flags: 0x80000000(zone=2) raw: 80000000 00000100 00000122 00000000 00000001 00000000 ffffffff 00000001 raw: 00000000 page dumped because: pagealloc: corrupted page details [...] With THREAD_SHIFT=14 the stack issue does not show up. A kernel with inline KASAN and same setup otherwise won't boot showing me this at the OpenFirmware prompt: [...] Finalizing device tree... using OF tree (promptr=ff847240) Invalid memory access at %SRR0: 40000000 %SRR1: 00000000 -- You may reply to this email to add a comment. You are receiving this mail because: You are watching the assignee of the bug.
