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

From: [email-masked]
Date: Mon, 09 Oct 2023 15:50:06 +0000

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

--- Comment #14 from Erhard F. ([email-masked]) ---
Thanks for having a look at the issue!

Applied your patch on top of v6.5.6 but it didn't work out. Now I get:

[...]
drmem: No dynamic reconfiguration memory found
ata5.00: ATAPI: HL-DT-STDVD-RAM GH22NP20, 2.00, max UDMA/66
kmemleak: Not scanning unknown object at 0xc00000007f000000
ata5.01: CFA: DeLOCK 54143 512MB, 100511E, max UDMA/66
CPU: 1 PID: 1 Comm: swapper/0 Not tainted 6.5.6-PMacG5-dirty #1
ata5.01: 1009008 sectors, multi 1: LBA 
Hardware name: PowerMac11,2 PPC970MP 0x440101 PowerMac
Call Trace:
[c0000000030ebbd0] [c000000000c2adac] dump_stack_lvl+0x70/0xa0 (unreliable)
[c0000000030ebc00] [c0000000003125d0] kmemleak_no_scan+0xf0/0x110
[c0000000030ebc70] [c000000001011594] iommu_init_late_dart+0x28/0x5c
[c0000000030ebc90] [c00000000000d6f8] do_one_initcall+0x68/0x2f8
[c0000000030ebd60] [c000000001004534] kernel_init_freeable+0x2d8/0x358
[c0000000030ebdf0] [c00000000000dc18] kernel_init+0x28/0x180
[c0000000030ebe50] [c00000000000bf94] ret_from_kernel_user_thread+0x14/0x1c
--- interrupt: 0 at 0x0
NIP:  0000000000000000 LR: 0000000000000000 CTR: 0000000000000000
REGS: c0000000030ebe80 TRAP: 0000   Not tainted  (6.5.6-PMacG5-dirty)
MSR:  0000000000000000 <>  CR: 00000000  XER: 00000000
IRQMASK: 0 
GPR00: 0000000000000000 0000000000000000 0000000000000000 0000000000000000 
GPR04: 0000000000000000 0000000000000000 0000000000000000 0000000000000000 
GPR08: 0000000000000000 0000000000000000 0000000000000000 0000000000000000 
GPR12: 0000000000000000 0000000000000000 0000000000000000 0000000000000000 
GPR16: 0000000000000000 0000000000000000 0000000000000000 0000000000000000 
GPR20: 0000000000000000 0000000000000000 0000000000000000 0000000000000000 
GPR24: 0000000000000000 0000000000000000 0000000000000000 0000000000000000 
GPR28: 0000000000000000 0000000000000000 0000000000000000 0000000000000000 
ata1: SATA link down (SStatus 4 SControl 300)
NIP [0000000000000000] 0x0
LR [0000000000000000] 0x0
--- interrupt: 0
Loading compiled-in X.509 certificates
kmemleak: Kernel memory leak detector initialized (mem pool available: 15788)
kmemleak: Automatic memory scanning thread started
debug_vm_pgtable: [debug_vm_pgtable         ]: Validating architecture page
table helpers
Btrfs loaded, zoned=no, fsverity=no
[...]

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