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

From: [email-masked]
Date: Mon, 20 Jun 2022 23:14:43 +0000

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

            Bug ID: 216156
           Summary: kmemleak: Not scanning unknown object at
                    0xc00000007f000000
           Product: Platform Specific/Hardware
           Version: 2.5
    Kernel Version: 5.19-rc3
          Hardware: PPC-64
                OS: Linux
              Tree: Mainline
            Status: NEW
          Severity: normal
          Priority: P1
         Component: PPC-64
          Assignee: [email-masked]
          Reporter: [email-masked]
        Regression: No

Created attachment 301230
  --> https://bugzilla.kernel.org/attachment.cgi?id=301230&action=edit
dmesg (5.19-rc3, PowerMac G5 11,2)

Happens every boot with kmemleak enabled:

[...]
PowerMac motherboard: PowerMac G5 Dual Core
ioremap() called early from .btext_map+0x64/0xc0. Use early_ioremap() instead
ioremap() called early from .iommu_init_early_dart+0x260/0x924. Use
early_ioremap() instead
kmemleak: Not scanning unknown object at 0xc00000007f000000
CPU: 0 PID: 0 Comm: swapper Not tainted 5.19.0-rc3-PMacG5+ #2
Call Trace:
[c00000000113faf0] [c0000000006c03d0] .dump_stack_lvl+0x7c/0xc4 (unreliable)
[c00000000113fb80] [c0000000002dff90] .kmemleak_no_scan+0xe0/0x100
[c00000000113fc00] [c000000000d487e8] .iommu_init_early_dart+0x2f0/0x924
[c00000000113fd40] [c000000000d49984] .pmac_probe+0x1b0/0x20c
[c00000000113fde0] [c000000000d36ee8] .setup_arch+0x1b8/0x674
[c00000000113feb0] [c000000000d316f4] .start_kernel+0xdc/0xb74
[c00000000113ff90] [c00000000000c5d8] start_here_common+0x1c/0x44
DART table allocated at: (____ptrval____)
DART IOMMU initialized for U4 type chipset
Using PowerMac machine description
printk: bootconsole [udbg0] enabled
CPU maps initialized for 1 thread per core
[...]

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