KASAN / KUNIT: testing ran on qemu-arm and list of failures

From: Naresh Kamboju
Date: Wed Nov 02 2022 - 10:15:48 EST

This is a report to get a quick update on kasan on qemu-arm.

The KASAN / KUNIT testing ran on qemu-arm and the following test cases failed
and the kernel crashed.

Following tests failed,
kasan_strings - FAILED
vmalloc_oob - FAILED
kasan_memchr - FAILED
kasan - FAILED
kasan_bitops_generic - FAILED

Reported-by: Linux Kernel Functional Testing <lkft@xxxxxxxxxx>

Boot and test log:
[ 0.000000] Linux version 6.0.7-rc1 (tuxmake@tuxmake)
(arm-linux-gnueabihf-gcc (Debian 10.2.1-6) 10.2.1 20210110, GNU ld
(GNU Binutils for Debian) 2.35.2) #1 SMP @1667356522
[ 0.000000] CPU: ARMv7 Processor [410fd034] revision 4 (ARMv7), cr=10c5383d
...
[ 0.000000] kasan: Mapping kernel virtual memory block:
c0000000-f0000000 at shadow: b7000000-bd000000
[ 0.000000] kasan: Mapping kernel virtual memory block:
bfe00000-c0000000 at shadow: b6fc0000-b7000000
[ 0.000000] kasan: Kernel address sanitizer initialized
...
[ 81.058636] ok 41 - kmem_cache_double_destroy
[ 81.059932] # kasan_memchr: EXPECTATION FAILED at lib/test_kasan.c:920
[ 81.059932] KASAN failure expected in \"kasan_ptr_result =
memchr(ptr, '1', size + 1)\", but none occurred
[ 81.063106] not ok 42 - kasan_memchr
...
[ 81.221595] # kasan_strings: EXPECTATION FAILED at lib/test_kasan.c:975
[ 81.221595] KASAN failure expected in \"kasan_ptr_result =
strchr(ptr, '1')\", but none occurred
[ 81.223903] # kasan_strings: EXPECTATION FAILED at lib/test_kasan.c:977
[ 81.223903] KASAN failure expected in \"kasan_ptr_result =
strrchr(ptr, '1')\", but none occurred
...
[ 429.920201] Insufficient stack space to handle exception!
[ 429.920232] Task stack: [0xfa000000..0xfa004000]
[ 429.925226] IRQ stack: [0xf0808000..0xf080c000]
[ 429.927424] Overflow stack: [0xc4190000..0xc4191000]
[ 429.929785] Internal error: kernel stack overflow: 0 [#1] SMP ARM
[ 429.933101] Modules linked in: usbtest pci_endpoint_test
pci_epf_test preemptirq_delay_test soc_utils_test(N) snd_soc_core
ac97_bus snd_pcm_dmaengine snd_pcm snd_timer snd soundcore cfg80211
bluetooth crc32_arm_ce sha2_arm_ce sha256_arm sha1_arm_ce sha1_arm
aes_arm_ce crypto_simd
[ 429.946324] CPU: 1 PID: 3390 Comm: grep Tainted: G B
N 6.0.7-rc1 #1
[ 429.950389] Hardware name: Generic DT based system
[ 429.952979] PC is at trace_hardirqs_off+0x0/0x16c
[ 429.955349] LR is at __dabt_svc+0x48/0x80
...
[ 902.927481] Insufficient stack space to handle exception!
[ 902.927520] Task stack: [0xfa138000..0xfa13c000]
[ 902.932386] IRQ stack: [0xf0800000..0xf0804000]
[ 902.934770] Overflow stack: [0xc418f000..0xc4190000]
[ 902.937770] Internal error: kernel stack overflow: 0 [#3] SMP ARM
[ 902.941255] Modules linked in: usbtest pci_endpoint_test
pci_epf_test preemptirq_delay_test soc_utils_test(N) snd_soc_core
ac97_bus snd_pcm_dmaengine snd_pcm snd_timer snd soundcore cfg80211
bluetooth crc32_arm_ce sha2_arm_ce sha256_arm sha1_arm_ce sha1_arm
aes_arm_ce crypto_simd
[ 902.954667] CPU: 0 PID: 3440 Comm: agetty Tainted: G B D
N 6.0.7-rc1 #1
[ 902.959155] Hardware name: Generic DT based system
[ 902.961688] PC is at trace_hardirqs_off+0x0/0x16c
[ 902.964151] LR is at __dabt_svc+0x48/0x80
[ 902.966393] pc : [<c04c98fc>] lr : [<c0300b28>] psr: 400c0193
[ 902.969925] sp : fa138008 ip : 00000051 fp : fa13be74
[ 902.973008] r10: c6175180 r9 : ce082c00 r8 : fa1380b8
[ 902.976025] r7 : fa13803c r6 : ffffffff r5 : 200c0193 r4 : c05eb00c
[ 902.979718] r3 : c1b29438 r2 : fa138054 r1 : be42701f r0 : 00000051
[ 902.983275] Flags: nZcv IRQs off FIQs on Mode SVC_32 ISA ARM
Segment none
[ 902.986903] Control: 10c5383d Table: 498d806a DAC: 00000051
[ 902.989830] Register r0 information: non-paged memory
[ 902.992732] Register r1 information: non-paged memory
[ 902.995532] Register r2 information: 4-page vmalloc region starting
at 0xfa138000 allocated at kernel_clone+0xb0/0x53c
[ 903.001090] Register r3 information: non-slab/vmalloc memory
[ 903.004149] Register r4 information: non-slab/vmalloc memory
[ 903.007262] Register r5 information: non-paged memory
[ 903.010091] Register r6 information: non-paged memory
[ 903.012782] Register r7 information: 4-page vmalloc region starting
at 0xfa138000 allocated at kernel_clone+0xb0/0x53c
[ 903.018743] Register r8 information: 4-page vmalloc region starting
at 0xfa138000 allocated at kernel_clone+0xb0/0x53c
[ 903.024227] Register r9 information: slab task_struct start
ce082c00 pointer offset 0
[ 903.028265] Register r10 information: slab mm_struct start c6175180
pointer offset 0 size 168
[ 903.033051] Register r11 information: 4-page vmalloc region
starting at 0xfa138000 allocated at kernel_clone+0xb0/0x53c
[ 903.038677] Register r12 information: non-paged memory
[ 903.041458] Process agetty (pid: 3440, stack limit = 0xa4d91b13)
...
[ 905.331477] trace_hardirqs_off from __dabt_svc+0x48/0x80
[ 905.334275] Exception stack(0xfa138008 to 0xfa138050)
[ 905.337192] 8000: fa1380f8 be42701f fa1380f8
00000003 be427035 fa1380b8
[ 905.341804] 8020: c31192e0 00000005 fa1380b8 c3119330 c6175180
fa13be74 00000051 fa138054
[ 905.346074] 8040: c1b29438 c05eb00c 200c0193 ffffffff
[ 905.348746] __dabt_svc from __asan_load4+0x30/0x88
[ 905.351332] __asan_load4 from do_translation_fault+0x34/0x124
[ 905.354779] do_translation_fault from do_DataAbort+0x54/0xf4
[ 905.358091] do_DataAbort from __dabt_svc+0x50/0x80
[ 905.360842] Exception stack(0xfa1380b8 to 0xfa138100)

[1] https://qa-reports.linaro.org/lkft/linux-stable-rc-linux-6.0.y/build/v6.0.6-241-g436175d0f780/testrun/12809413/suite/log-parser-test/test/check-kernel-bug/details/
[2] https://qa-reports.linaro.org/lkft/linux-stable-rc-linux-6.0.y/build/v6.0.6-241-g436175d0f780/testrun/12809413/suite/log-parser-test/test/check-kernel-bug/log

metadata:
git_ref: linux-6.0.y
git_repo: https://gitlab.com/Linaro/lkft/mirrors/stable/linux-stable-rc
git_sha: 436175d0f780af8302164b3102ecf0ff99f7a376
git_describe: v6.0.6-241-g436175d0f780
kernel_version: 6.0.7-rc1
kernel-config: https://builds.tuxbuild.com/2GyMQxdakmLexUwkh1d3VjAfSgv/config
build-url: https://gitlab.com/Linaro/lkft/mirrors/stable/linux-stable-rc/-/pipelines/683032123
artifact-location: https://builds.tuxbuild.com/2GyMQxdakmLexUwkh1d3VjAfSgv
toolchain: gcc-10


--
Linaro LKFT
https://lkft.linaro.org