Subject: [Bug 216156] [bisected] kmemleak: Not scanning unknown object at 0xc00000007f000000

From: [email-masked]
Date: Fri, 19 Apr 2024 08:30:34 +0000

https://bugzilla.kernel.org/show_bug.cgi?id=216156

--- Comment #17 from Erhard F. ([email-masked]) ---
Just noticed the issue is still there in v6.9-rc4. Does some side effects
prevented the patch to get upstream or was it overlooked? ;)

[..]
Page orders: linear mapping = 12, virtual = 12, io = 12
hash-mmu: Initializing hash mmu with SLB
Linux version 6.9.0-rc4-PMacG5-dirty (root@T1000) (gcc (Gentoo 13.2.1_p20240210
p14) 13.2.1 20240210, GNU ld (Gentoo 2.42 p3) 2.42.0) #1 SMP Fri Apr 19
01:23:36 CEST 2024
ioremap() called early from pmac_feature_init+0x5e8/0x12d8. Use early_ioremap()
instead
ioremap() called early from pmac_feature_init+0x1040/0x12d8. Use
early_ioremap() instead
Found U4 memory controller & host bridge @ 0xf8000000 revision: 0x42
Mapped at 0xc0003e0080000000
ioremap() called early from probe_one_macio+0x3e4/0x6cc. Use early_ioremap()
instead
Found a Shasta mac-io controller, rev: 0, mapped at 0x(____ptrval____)
PowerMac motherboard: PowerMac G5 Dual Core
ioremap() called early from btext_map+0x6c/0xf0. Use early_ioremap() instead
ioremap() called early from iommu_init_early_dart+0x174/0xac4. Use
early_ioremap() instead
kmemleak: Not scanning unknown object at 0xc00000007f000000
CPU: 0 PID: 0 Comm: swapper Not tainted 6.9.0-rc4-PMacG5-dirty #1
Call Trace:
[c0000000022f3c50] [c000000000d6524c] dump_stack_lvl+0x84/0x10c (unreliable)
[c0000000022f3c80] [c000000000379118] kmemleak_no_scan+0x118/0x12c
[c0000000022f3cf0] [c000000002029110] iommu_init_early_dart+0x1e4/0xac4
[c0000000022f3e00] [c00000000202a3d8] pmac_probe+0x158/0x290
[c0000000022f3e60] [c000000002011608] setup_arch+0x2b0/0xa18
[c0000000022f3f30] [c00000000200613c] start_kernel+0x98/0x81c
[c0000000022f3fe0] [c00000000000c848] start_here_common+0x1c/0x20
DART table allocated at: (____ptrval____)
DART IOMMU initialized for U4 type chipset
Hardware name: PowerMac11,2 PPC970MP 0x440101 PowerMac
printk: legacy bootconsole [udbg0] enabled
CPU maps initialized for 1 thread per core
 (thread shift is 0)
Allocated 1040 bytes for 2 pacas
-----------------------------------------------------
phys_mem_size     = 0x400000000
dcache_bsize      = 0x80
icache_bsize      = 0x80
cpu_features      = 0x00000100900c218a
  possible        = 0x001ffbebfbffb18f
  always          = 0x0000000000000180
cpu_user_features = 0xdc080000 0x00000000
mmu_features      = 0x0c008001
firmware_features = 0x0000000000000000
vmalloc start     = 0xc0003d0000000000
IO start          = 0xc0003e0000000000
vmemmap start     = 0xc0003f0000000000
hash-mmu: ppc64_pft_size    = 0x0
hash-mmu: htab_hash_mask    = 0x1fffff
-----------------------------------------------------

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