[PATCH v3 00/12] kasan: unify kasan_arch_is_ready() and remove arch-specific implementations
Christophe Leroy
christophe.leroy at csgroup.eu
Mon Aug 4 22:04:28 AEST 2025
Hi,
Le 03/08/2025 à 21:27, Sabyrzhan Tasbolatov a écrit :
> On Wed, Jul 23, 2025 at 10:33 PM Andrey Ryabinin <ryabinin.a.a at gmail.com> wrote:
>>
>> ...
>>
>> I don't know if it's a real problem or not. I'm just pointing out that we might
>> have tricky use case here and maybe that's a problem, because nobody had such use
>> case in mind. But maybe it's just fine.
>> I think we just need to boot test it, to see if this works.
>> ...
>> powerpc used static key same way before your patches, so powerpc should be fine.
>
> Hello,
>
> Just heads up that I am still working on v4.
> While I can verify the success on compile and booting with my changes
> on x86, arm with SW/HW_TAGS modes, I'm having issues with PowerPC, UML
> arch that selects ARCH_DEFER_KASAN.
>
> Adding Christophe Leroy in TO. Please advise on the powerpc panic issue.
I don't have the problem you report. Is it with your v3 series ?
I started from
https://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux.git/log/?h=merge
(commit de12314b471bf)
Took your series with
b4 shazam 20250717142732.292822-1-snovitoll at gmail.com
built ppc64le_defconfig
And successfully boot it under QEMU:
$ qemu-system-ppc64 -M pseries,x-vof=on -m 1G -nographic -vga none
-kernel vmlinux -initrd qemu/rootfs-el.cpio.gz -append noreboot
qemu-system-ppc64: warning: TCG doesn't support requested feature,
cap-cfpc=workaround
qemu-system-ppc64: warning: TCG doesn't support requested feature,
cap-sbbc=workaround
qemu-system-ppc64: warning: TCG doesn't support requested feature,
cap-ibs=workaround
qemu-system-ppc64: warning: TCG doesn't support requested feature,
cap-ccf-assist=on
[ 0.000000][ T0] random: crng init done
[ 0.000000][ T0] radix-mmu: Page sizes from device-tree:
[ 0.000000][ T0] radix-mmu: Page size shift = 12 AP=0x0
[ 0.000000][ T0] radix-mmu: Page size shift = 16 AP=0x5
[ 0.000000][ T0] radix-mmu: Page size shift = 21 AP=0x1
[ 0.000000][ T0] radix-mmu: Page size shift = 30 AP=0x2
[ 0.000000][ T0] Activating Kernel Userspace Access Prevention
[ 0.000000][ T0] Activating Kernel Userspace Execution Prevention
[ 0.000000][ T0] radix-mmu: Mapped
0x0000000000000000-0x0000000003e00000 with 2.00 MiB pages (exec)
[ 0.000000][ T0] radix-mmu: Mapped
0x0000000003e00000-0x0000000040000000 with 2.00 MiB pages
[ 0.000000][ T0] lpar: Using radix MMU under hypervisor
[ 0.000000][ T0] Linux version 6.16.0-02450-g1c11a8599f68
(chleroy at PO20335.IDSI0.si.c-s.fr) (powerpc64-linux-gcc (GCC) 8.5.0, GNU
ld (GNU Binutils) 2.36.1) #1459 SMP Mon Aug 4 12:49:11 CEST 2025
[ 0.000000][ T0] KernelAddressSanitizer initialized (generic)
[ 0.000000][ T0] OF: reserved mem: Reserved memory: No
reserved-memory node in the DT
[ 0.000000][ T0] Found initrd at 0xc000000004cf0000:0xc00000000530d15a
[ 0.000000][ T0] Hardware name: IBM pSeries (emulated by qemu)
POWER9 (architected) 0x4e1202 0xf000005 pSeries
[ 0.000000][ T0] printk: legacy bootconsole [udbg0] enabled
[ 0.000000][ T0] Partition configured for 1 cpus.
[ 0.000000][ T0] CPU maps initialized for 1 thread per core
[ 0.000000][ T0] numa: Partition configured for 1 NUMA nodes.
[ 0.000000][ T0] -----------------------------------------------------
[ 0.000000][ T0] phys_mem_size = 0x40000000
[ 0.000000][ T0] dcache_bsize = 0x80
[ 0.000000][ T0] icache_bsize = 0x80
[ 0.000000][ T0] cpu_features = 0x0001c06b8f4f9187
[ 0.000000][ T0] possible = 0x003ffbfbcf5fb187
[ 0.000000][ T0] always = 0x0000000380008181
[ 0.000000][ T0] cpu_user_features = 0xdc0065c2 0xaef00000
[ 0.000000][ T0] mmu_features = 0x3c007641
[ 0.000000][ T0] firmware_features = 0x00000a85455a445f
[ 0.000000][ T0] vmalloc start = 0xc008000000000000
[ 0.000000][ T0] IO start = 0xc00a000000000000
[ 0.000000][ T0] vmemmap start = 0xc00c000000000000
[ 0.000000][ T0] -----------------------------------------------------
[ 0.000000][ T0] NODE_DATA(0) allocated [mem 0x3fb30800-0x3fb37fff]
[ 0.000000][ T0] rfi-flush: fallback displacement flush available
[ 0.000000][ T0] rfi-flush: ori type flush available
[ 0.000000][ T0] rfi-flush: mttrig type flush available
[ 0.000000][ T0] count-cache-flush: hardware flush enabled.
[ 0.000000][ T0] link-stack-flush: software flush enabled.
[ 0.000000][ T0] stf-barrier: eieio barrier available
[ 0.000000][ T0] PPC64 nvram contains 65536 bytes
[ 0.000000][ T0] barrier-nospec: using ORI speculation barrier
[ 0.000000][ T0] Zone ranges:
[ 0.000000][ T0] Normal [mem
0x0000000000000000-0x000000003fffffff]
[ 0.000000][ T0] Device empty
[ 0.000000][ T0] Movable zone start for each node
[ 0.000000][ T0] Early memory node ranges
[ 0.000000][ T0] node 0: [mem
0x0000000000000000-0x000000003fffffff]
[ 0.000000][ T0] Initmem setup node 0 [mem
0x0000000000000000-0x000000003fffffff]
[ 0.000000][ T0] percpu: Embedded 3 pages/cpu s122904 r0 d73704
u196608
[ 0.000000][ T0] Kernel command line: noreboot
[ 0.000000][ T0] Unknown kernel command line parameters
"noreboot", will be passed to user space.
[ 0.000000][ T0] printk: log buffer data + meta data: 262144 +
917504 = 1179648 bytes
[ 0.000000][ T0] Dentry cache hash table entries: 131072 (order:
4, 1048576 bytes, linear)
[ 0.000000][ T0] Inode-cache hash table entries: 65536 (order: 3,
524288 bytes, linear)
[ 0.000000][ T0] Fallback order for Node 0: 0
[ 0.000000][ T0] Built 1 zonelists, mobility grouping on. Total
pages: 16384
[ 0.000000][ T0] Policy zone: Normal
[ 0.000000][ T0] mem auto-init: stack:off, heap alloc:off, heap
free:off
[ 0.000000][ T0] stackdepot: allocating hash table via
alloc_large_system_hash
[ 0.000000][ T0] stackdepot hash table entries: 1048576 (order: 8,
16777216 bytes, linear)
[ 0.000000][ T0] SLUB: HWalign=128, Order=0-3, MinObjects=0,
CPUs=1, Nodes=1
[ 0.000000][ T0] ftrace: allocating 47840 entries in 12 pages
[ 0.000000][ T0] ftrace: allocated 12 pages with 2 groups
[ 0.000000][ T0] rcu: Hierarchical RCU implementation.
[ 0.000000][ T0] rcu: RCU event tracing is enabled.
[ 0.000000][ T0] rcu: RCU restricting CPUs from NR_CPUS=2048 to
nr_cpu_ids=1.
[ 0.000000][ T0] Rude variant of Tasks RCU enabled.
[ 0.000000][ T0] Tracing variant of Tasks RCU enabled.
[ 0.000000][ T0] rcu: RCU calculated value of scheduler-enlistment
delay is 100 jiffies.
[ 0.000000][ T0] rcu: Adjusting geometry for rcu_fanout_leaf=16,
nr_cpu_ids=1
[ 0.000000][ T0] RCU Tasks Rude: Setting shift to 0 and lim to 1
rcu_task_cb_adjust=1 rcu_task_cpu_ids=1.
[ 0.000000][ T0] RCU Tasks Trace: Setting shift to 0 and lim to 1
rcu_task_cb_adjust=1 rcu_task_cpu_ids=1.
[ 0.000000][ T0] NR_IRQS: 512, nr_irqs: 512, preallocated irqs: 16
[ 0.000000][ T0] xive: Using IRQ range [0-0]
[ 0.000000][ T0] xive: Interrupt handling initialized with spapr
backend
[ 0.000000][ T0] xive: Using priority 6 for all interrupts
[ 0.000000][ T0] xive: Using 64kB queues
[ 0.000000][ T0] rcu: srcu_init: Setting srcu_struct sizes based
on contention.
[ 0.000290][ T0] time_init: 56 bit decrementer (max: 7fffffffffffff)
[ 0.001690][ T0] clocksource: timebase: mask: 0xffffffffffffffff
max_cycles: 0x761537d007, max_idle_ns: 440795202126 ns
[ 0.003232][ T0] clocksource: timebase mult[1f40000] shift[24]
registered
[ 0.040308][ T0] Console: colour dummy device 80x25
[ 0.042553][ T0] printk: legacy console [hvc0] enabled
[ 0.042553][ T0] printk: legacy console [hvc0] enabled
[ 0.043883][ T0] printk: legacy bootconsole [udbg0] disabled
[ 0.043883][ T0] printk: legacy bootconsole [udbg0] disabled
[ 0.052810][ T0] pid_max: default: 32768 minimum: 301
[ 0.062682][ T0] LSM: initializing
lsm=lockdown,capability,landlock,yama,selinux,bpf,ima
[ 0.075902][ T0] landlock: Up and running.
[ 0.076246][ T0] Yama: becoming mindful.
[ 0.077639][ T0] SELinux: Initializing.
[ 0.157184][ T0] LSM support for eBPF active
[ 0.170713][ T0] Mount-cache hash table entries: 8192 (order: 0,
65536 bytes, linear)
[ 0.171081][ T0] Mountpoint-cache hash table entries: 8192 (order:
0, 65536 bytes, linear)
[ 0.319421][ T1] POWER9 performance monitor hardware support
registered
[ 0.329508][ T1] rcu: Hierarchical SRCU implementation.
[ 0.329940][ T1] rcu: Max phase no-delay instances is 400.
[ 0.382714][ T1] smp: Bringing up secondary CPUs ...
[ 0.385679][ T1] smp: Brought up 1 node, 1 CPU
[ 0.392599][ T1] numa: Node 0 CPUs: 0
[ 0.445093][ T20] node 0 deferred pages initialised in 21ms
[ 0.447420][ T1] Memory: 784000K/1048576K available (25600K kernel
code, 9216K rwdata, 23552K rodata, 13824K init, 2373K bss, 254528K
reserved, 0K cma-reserved)
[ 0.469596][ T20] pgdatinit0 (20) used greatest stack depth: 29936
bytes left
[ 0.504269][ T1] devtmpfs: initialized
[ 0.605561][ T1] PCI host bridge /pci at 800000020000000 ranges:
[ 0.607269][ T1] IO 0x0000200000000000..0x000020000000ffff ->
0x0000000000000000
[ 0.607837][ T1] MEM 0x0000200080000000..0x00002000ffffffff ->
0x0000000080000000
[ 0.608141][ T1] MEM 0x0000210000000000..0x000021ffffffffff ->
0x0000210000000000
[ 0.623659][ T1] clocksource: jiffies: mask: 0xffffffff
max_cycles: 0xffffffff, max_idle_ns: 1911260446275000 ns
[ 0.625600][ T1] posixtimers hash table entries: 512 (order: -3,
8192 bytes, linear)
[ 0.627067][ T1] futex hash table entries: 256 (32768 bytes on 1
NUMA nodes, total 32 KiB, linear).
[ 0.692128][ T1] NET: Registered PF_NETLINK/PF_ROUTE protocol family
[ 0.714282][ T1] audit: initializing netlink subsys (disabled)
[ 0.722232][ T25] audit: type=2000 audit(1754308137.543:1):
state=initialized audit_enabled=0 res=1
[ 0.743697][ T1] cpuidle: using governor menu
[ 0.755015][ T1] WARNING: nvram corruption detected: 0-length
partition
[ 0.755541][ T1] nvram: No room to create ibm,rtas-log partition,
deleting any obsolete OS partitions...
[ 0.755794][ T1] nvram: Failed to find or create ibm,rtas-log
partition, err -28
[ 0.756219][ T1] nvram: No room to create lnx,oops-log partition,
deleting any obsolete OS partitions...
[ 0.756379][ T1] nvram: Failed to find or create lnx,oops-log
partition, err -28
Linux ppc64le
#1459 SMP Mon Au[ 0.756539][ T1] nvram: Failed to initialize oops
partition!
[ 0.762921][ T1] EEH: pSeries platform initialized
[ 0.808097][ T1] kprobes: kprobe jump-optimization is enabled. All
kprobes are optimized if possible.
[ 1.365147][ T1] HugeTLB: allocation took 0ms with
hugepage_allocation_threads=1
[ 1.366269][ T1] HugeTLB: registered 2.00 MiB page size,
pre-allocated 0 pages
[ 1.366456][ T1] HugeTLB: 0 KiB vmemmap can be freed for a 2.00
MiB page
[ 1.366728][ T1] HugeTLB: registered 1.00 GiB page size,
pre-allocated 0 pages
[ 1.366870][ T1] HugeTLB: 0 KiB vmemmap can be freed for a 1.00
GiB page
[ 1.486251][ T1] iommu: Default domain type: Translated
[ 1.486543][ T1] iommu: DMA domain TLB invalidation policy: strict
mode
[ 1.525452][ T1] SCSI subsystem initialized
[ 1.552424][ T1] usbcore: registered new interface driver usbfs
[ 1.554049][ T1] usbcore: registered new interface driver hub
[ 1.559907][ T1] usbcore: registered new device driver usb
[ 1.562100][ T1] pps_core: LinuxPPS API ver. 1 registered
[ 1.562266][ T1] pps_core: Software ver. 5.3.6 - Copyright
2005-2007 Rodolfo Giometti <giometti at linux.it>
[ 1.566642][ T1] PTP clock support registered
[ 1.577168][ T1] EDAC MC: Ver: 3.0.0
[ 1.672772][ T1] PCI: Probing PCI hardware
[ 1.833395][ T1] PCI host bridge to bus 0000:00
[ 1.834524][ T1] pci_bus 0000:00: root bus resource [io
0x10000-0x1ffff] (bus address [0x0000-0xffff])
[ 1.835316][ T1] pci_bus 0000:00: root bus resource [mem
0x200080000000-0x2000ffffffff] (bus address [0x80000000-0xffffffff])
[ 1.835750][ T1] pci_bus 0000:00: root bus resource [mem
0x210000000000-0x21ffffffffff 64bit]
[ 1.836268][ T1] pci_bus 0000:00: root bus resource [bus 00-ff]
[ 1.852192][ T1] IOMMU table initialized, virtual merging enabled
[ 1.864698][ T1] pci_bus 0000:00: resource 4 [io 0x10000-0x1ffff]
[ 1.864967][ T1] pci_bus 0000:00: resource 5 [mem
0x200080000000-0x2000ffffffff]
[ 1.865136][ T1] pci_bus 0000:00: resource 6 [mem
0x210000000000-0x21ffffffffff 64bit]
[ 1.865619][ T1] EEH: No capable adapters found: recovery disabled.
[ 1.895816][ T1] vgaarb: loaded
[ 1.906597][ T1] clocksource: Switched to clocksource timebase
[ 7.645823][ T1] NET: Registered PF_INET protocol family
[ 7.650783][ T1] IP idents hash table entries: 16384 (order: 1,
131072 bytes, linear)
[ 7.684628][ T1] tcp_listen_portaddr_hash hash table entries: 4096
(order: 0, 65536 bytes, linear)
[ 7.686311][ T1] Table-perturb hash table entries: 65536 (order:
2, 262144 bytes, linear)
[ 7.687827][ T1] TCP established hash table entries: 8192 (order:
0, 65536 bytes, linear)
[ 7.690430][ T1] TCP bind hash table entries: 8192 (order: 2,
262144 bytes, linear)
[ 7.694736][ T1] TCP: Hash tables configured (established 8192
bind 8192)
[ 7.697887][ T1] UDP hash table entries: 1024 (order: 0, 65536
bytes, linear)
[ 7.700717][ T1] UDP-Lite hash table entries: 1024 (order: 0,
65536 bytes, linear)
[ 7.709437][ T1] NET: Registered PF_UNIX/PF_LOCAL protocol family
[ 7.728670][ T1] RPC: Registered named UNIX socket transport module.
[ 7.729411][ T1] RPC: Registered udp transport module.
[ 7.729661][ T1] RPC: Registered tcp transport module.
[ 7.729825][ T1] RPC: Registered tcp-with-tls transport module.
[ 7.731574][ T1] RPC: Registered tcp NFSv4.1 backchannel transport
module.
[ 7.732309][ T1] PCI: CLS 0 bytes, default 128
[ 7.769612][ T12] Trying to unpack rootfs image as initramfs...
[ 7.937617][ T1] Initialise system trusted keyrings
[ 7.942505][ T1] Key type blacklist registered
[ 7.964894][ T1] workingset: timestamp_bits=38 max_order=14
bucket_order=0
[ 8.127738][ T1] NFS: Registering the id_resolver key type
[ 8.129779][ T1] Key type id_resolver registered
[ 8.130646][ T1] Key type id_legacy registered
[ 8.150761][ T1] SGI XFS with ACLs, security attributes, no debug
enabled
[ 8.343926][ T1] integrity: Platform Keyring initialized
[ 8.348809][ T1] Key type asymmetric registered
[ 8.354232][ T1] Asymmetric key parser 'x509' registered
[ 8.372851][ T1] Block layer SCSI generic (bsg) driver version 0.4
loaded (major 247)
[ 8.375844][ T1] io scheduler mq-deadline registered
[ 8.377498][ T1] io scheduler kyber registered
[ 11.082153][ T1] Serial: 8250/16550 driver, 4 ports, IRQ sharing
disabled
[ 11.199822][ T1] Non-volatile memory driver v1.3
[ 11.749528][ T1] brd: module loaded
[ 12.062135][ T1] loop: module loaded
[ 12.078153][ T1] ipr: IBM Power RAID SCSI Device Driver version:
2.6.4 (March 14, 2017)
[ 12.118444][ T1] ibmvscsi 71000003: SRP_VERSION: 16.a
[ 12.134566][ T1] ibmvscsi 71000003: Maximum ID: 64 Maximum LUN: 32
Maximum Channel: 3
[ 12.135207][ T1] scsi host0: IBM POWER Virtual SCSI Adapter 1.5.9
[ 12.188126][ C0] ibmvscsi 71000003: partner initialization complete
[ 12.191555][ C0] ibmvscsi 71000003: host srp version: 16.a, host
partition qemu (0), OS 2, max io 2097152
[ 12.192709][ C0] ibmvscsi 71000003: sent SRP login
[ 12.193698][ C0] ibmvscsi 71000003: SRP_LOGIN succeeded
[ 12.381686][ T1] scsi 0:0:2:0: CD-ROM QEMU QEMU
CD-ROM 2.5+ PQ: 0 ANSI: 5
[ 17.470934][ T12] Freeing initrd memory: 6208K
[ 18.458146][ C0] sr 0:0:2:0: Power-on or device reset occurred
[ 18.468304][ T1] sr 0:0:2:0: [sr0] scsi3-mmc drive: 16x/50x cd/rw
xa/form2 cdda tray
[ 18.469176][ T1] cdrom: Uniform CD-ROM driver Revision: 3.20
[ 18.507507][ T1] sr 0:0:2:0: Attached scsi generic sg0 type 5
[ 18.535454][ T1] e100: Intel(R) PRO/100 Network Driver
[ 18.535682][ T1] e100: Copyright(c) 1999-2006 Intel Corporation
[ 18.536741][ T1] e1000: Intel(R) PRO/1000 Network Driver
[ 18.536894][ T1] e1000: Copyright (c) 1999-2006 Intel Corporation.
[ 18.538093][ T1] e1000e: Intel(R) PRO/1000 Network Driver
[ 18.538241][ T1] e1000e: Copyright(c) 1999 - 2015 Intel Corporation.
[ 18.548528][ T1] i2c_dev: i2c /dev entries driver
[ 18.551722][ T1] device-mapper: core: CONFIG_IMA_DISABLE_HTABLE is
disabled. Duplicate IMA measurements will not be recorded in the IMA log.
[ 18.553452][ T1] device-mapper: uevent: version 1.0.3
[ 18.564534][ T1] device-mapper: ioctl: 4.50.0-ioctl (2025-04-28)
initialised: dm-devel at lists.linux.dev
[ 18.591869][ T1] usbcore: registered new interface driver usbhid
[ 18.592226][ T1] usbhid: USB HID core driver
[ 18.594958][ T1] ipip: IPv4 and MPLS over IPv4 tunneling driver
[ 18.611797][ T1] NET: Registered PF_INET6 protocol family
[ 18.651618][ T1] Segment Routing with IPv6
[ 18.653186][ T1] In-situ OAM (IOAM) with IPv6
[ 18.656776][ T1] sit: IPv6, IPv4 and MPLS over IPv4 tunneling driver
[ 18.672737][ T1] NET: Registered PF_PACKET protocol family
[ 18.676757][ T1] Key type dns_resolver registered
[ 18.678951][ T1] secvar-sysfs: Failed to retrieve secvar operations
[ 18.683474][ T1] Running code patching self-tests ...
[ 19.045499][ T1] registered taskstats version 1
[ 19.055453][ T1] Loading compiled-in X.509 certificates
[ 19.106895][ T1] Loaded X.509 cert 'Build time autogenerated
kernel key: 9f01b0d991e9d73077cd296c67edb3efb56e2c47'
[ 19.372917][ T1] Demotion targets for Node 0: null
[ 19.373664][ T1] page_owner is disabled
[ 19.385615][ T1] Secure boot mode disabled
[ 19.387815][ T1] ima: No TPM chip found, activating TPM-bypass!
[ 19.389833][ T1] Loading compiled-in module X.509 certificates
[ 19.406497][ T1] Loaded X.509 cert 'Build time autogenerated
kernel key: 9f01b0d991e9d73077cd296c67edb3efb56e2c47'
[ 19.407680][ T1] ima: Allocated hash algorithm: sha256
[ 19.416714][ T1] Secure boot mode disabled
[ 19.417345][ T1] Trusted boot mode disabled
[ 19.417596][ T1] ima: No architecture policies found
[ 19.426439][ T1] printk: legacy console [netcon0] enabled
[ 19.426791][ T1] netconsole: network logging started
[ 19.610553][ T1] Freeing unused kernel image (initmem) memory: 13824K
[ 19.766345][ T1] Checked W+X mappings: passed, no W+X pages found
[ 19.767739][ T1] rodata_test: all tests were successful
[ 19.768936][ T1] Run /init as init process
[ 20.432221][ T58] mount (58) used greatest stack depth: 26992 bytes
left
[ 20.808923][ T60] mount (60) used greatest stack depth: 26416 bytes
left
mount: mounting devtmpfs on /dev failed: Device or resource busy
Starting syslogd: OK
Starting klogd: OK
Running sysctl: [ 24.879851][ T83] find (83) used greatest stack
depth: 26368 bytes left
[ 24.945794][ T84] xargs (84) used greatest stack depth: 26240 bytes
left
OK
Saving 256 bits of creditable seed for next boot
Starting network: [ 26.530674][ T96] ip (96) used greatest stack
depth: 26048 bytes left
[ 27.018425][ T97] ip (97) used greatest stack depth: 24256 bytes left
Waiting for interface eth0 to appear..... timeout!
run-parts: /etc/network/if-pre-up.d/wait_iface: exit status 1
FAIL
[ 33.902403][ C0] hrtimer: interrupt took 3450588 ns
Found console hvc0
Linux version 6.16.0-02450-g1c11a8599f68
(chleroy at PO20335.IDSI0.si.c-s.fr) (powerpc64-linux-gcc (GCC) 8.5.0, GNU
ld (GNU Binutils) 2.36.1) #1459 SMP Mon Aug 4 12:49:11 CEST 2025
Network interface test failed
TPM selftest failed
File system test skipped
Boot successful.
~ #
Christophe
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