Re: [linux-next20250901] Boot fail on IBM Power Server

[Vlastimil Babka]

On 9/2/25 06:55, Venkat Rao Bagalkote wrote:
> Greetings!!!
> 
> 
> IBM CI has reported a boot failure with next-20250901 repo on IBM Power 
> Server.
> 
> 
> Repo: https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git
> 
> gcc version 11.5.0 20240719
> 
> GNU ld version 2.35.2-54.el9
> 
> 
> Attached is the .config file.
> 
> 
> Traces:
> 
> 
> [    0.000000] mem auto-init: stack:off, heap alloc:off, heap free:off
> [    0.000000] SLUB: HWalign=128, Order=0-3, MinObjects=0, CPUs=32, Nodes=32
> [    0.000000] BUG: Kernel NULL pointer dereference on read at 0x00000040
> [    0.000000] Faulting instruction address: 0xc00000000059eaac
> [    0.000000] Oops: Kernel access of bad area, sig: 7 [#1]
> [    0.000000] LE PAGE_SIZE=64K MMU=Radix  SMP NR_CPUS=8192 NUMA pSeries
> [    0.000000] Modules linked in:
> [    0.000000] CPU: 0 UID: 0 PID: 0 Comm: swapper Not tainted 
> 6.17.0-rc4-next-20250901 #1 VOLUNTARY
> [    0.000000] Hardware name: IBM,9080-HEX Power11 (architected) 
> 0x820200 0xf000007 of:IBM,FW1110.01 (NH1110_069) hv:phyp pSeries
> [    0.000000] NIP:  c00000000059eaac LR: c00000000059eadc CTR: 
> 0000000000000000
> [    0.000000] REGS: c000000002c7faf0 TRAP: 0300   Not tainted 
> (6.17.0-rc4-next-20250901)
> [    0.000000] MSR:  8000000002001033 <SF,VEC,ME,IR,DR,RI,LE>  CR: 
> 44008220  XER: 20040001
> [    0.000000] CFAR: c00000000059eaf8 DAR: 0000000000000040 DSISR: 
> 00080000 IRQMASK: 3
> [    0.000000] GPR00: c00000000059eab8 c000000002c7fd90 c000000001678100 
> c000000004017400
> [    0.000000] GPR04: 0000000000000cc0 0000000000000001 0000000000000000 
> c000000002cea768
> [    0.000000] GPR08: 0000000000000008 0000000000000000 0000000000000000 
> 0000000000008000
> [    0.000000] GPR12: c00000000058f8d0 c000000002ff0000 0000000000000000 
> 0000000000000000
> [    0.000000] GPR16: 0000000000000000 0000000000000000 0000000000000000 
> 0000000000000000
> [    0.000000] GPR20: 0000000000c00000 0000000000000008 0000000000000000 
> c000000002f46870
> [    0.000000] GPR24: 0000000000000100 c000000002f468c8 c000000002f425c0 
> c000000004017400
> [    0.000000] GPR28: c000000001591188 c000000002cfca00 0000000000000001 
> c0000013fd27ebe0
> [    0.000000] NIP [c00000000059eaac] do_kmem_cache_create+0x4d4/0x634
> [    0.000000] LR [c00000000059eadc] do_kmem_cache_create+0x504/0x634
> [    0.000000] Call Trace:
> [    0.000000] [c000000002c7fd90] [c00000000059eab8] 
> do_kmem_cache_create+0x4e0/0x634 (unreliable)
> [    0.000000] [c000000002c7fe40] [c00000000050e518] 
> __kmem_cache_create_args+0x198/0x434
> [    0.000000] [c000000002c7fef0] [c0000000020b3630] 
> maple_tree_init+0x60/0x98
> [    0.000000] [c000000002c7ff40] [c000000002006420] 
> start_kernel+0x288/0x60c
> [    0.000000] [c000000002c7ffe0] [c00000000000ea9c] 
> start_here_common+0x1c/0x20
> [    0.000000] Code: 4e800020 3d220167 38e92668 3d2200c0 39490a84 
> e93b0008 7fe7402a 7d5f52aa 7fe9fa14 392a001c 79291f24 7d3b482a 
> <e9290040> f93f0020 4bff15e5 38be0001
> [    0.000000] ---[ end trace 0000000000000000 ]---
> [    0.000000]
> [    0.000000] Kernel panic - not syncing: Fatal exception
> [    0.000000] Rebooting in 10 seconds..
> 
> 
> 
> If you happen to fix this please add below tag.
> 
> 
> Reported-by: Venkat Rao Bagalkote <venkat88@xxxxxxxxxxxxx>

Could you check if this fixes it please?