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SubjectWARNING: CPU: 0 PID: 0 at arch/x86/include/asm/kfence.h:46 kfence_protect
Kunit test cases failed and found warnings while booting Linux next
version 6.1.0-rc5-next-20221117 on qemu-x86_64 [1].

It was working on Linux next-20221116 tag.

[ 0.663761] WARNING: CPU: 0 PID: 0 at
arch/x86/include/asm/kfence.h:46 kfence_protect+0x7b/0x120
[ 0.664033] WARNING: CPU: 0 PID: 0 at mm/kfence/core.c:234
kfence_protect+0x7d/0x120
[ 0.664465] kfence: kfence_init failed

Reported-by: Linux Kernel Functional Testing <lkft@linaro.org>

Regressions found on qemu_x86_64:[2]

- kunit/test_use_after_free_read
- kunit/test_invalid_access
- kunit/test_double_free-memcache
- kunit/test_krealloc
- kunit/test_shrink_memcache
- kunit/test_memcache_typesafe_by_rcu
- kunit/test_use_after_free_read-memcache
- kunit/test_invalid_addr_free-memcache
- kunit/test_out_of_bounds_read-memcache
- kunit/test_memcache_alloc_bulk
- kunit/test_out_of_bounds_read
- kunit/test_memcache_ctor
- kunit/test_corruption-memcache
- kunit/test_gfpzero
- kunit/test_out_of_bounds_write
- kunit/test_out_of_bounds_write-memcache
- kunit/test_kmalloc_aligned_oob_read
- kunit/test_free_bulk-memcache

[ 0.663758] ------------[ cut here ]------------
[ 0.663761] WARNING: CPU: 0 PID: 0 at
arch/x86/include/asm/kfence.h:46 kfence_protect+0x7b/0x120
[ 0.663782] Modules linked in:
[ 0.663788] CPU: 0 PID: 0 Comm: swapper/0 Not tainted
6.1.0-rc5-next-20221117 #1
[ 0.663795] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996),
BIOS 1.12.0-1 04/01/2014
[ 0.663801] RIP: 0010:kfence_protect+0x7b/0x120
[ 0.663811] Code: f1 f1 f1 f1 c7 40 04 04 f3 f3 f3 65 48 8b 04 25
28 00 00 00 48 89 45 d8 31 c0 e8 e0 0d ba ff 48 85 c0 74 06 83 7d a0
01 74 17 <0f> 0b 0f 0b c6 05 cb 97 1d 03 00 45 31 c0 c6 05 c0 97 1d 03
01 eb
[ 0.663819] RSP: 0000:ffffffff9c407d98 EFLAGS: 00010002
[ 0.663826] RAX: ffff8880adc01020 RBX: 00000000000001ff RCX: 80000001000001e3
[ 0.663830] RDX: dffffc0000000000 RSI: ffff88811ac00000 RDI: ffff8880adc01020
[ 0.663836] RBP: ffffffff9c407e18 R08: ffffffff997c8ef8 R09: ffffea00046b7f87
[ 0.663841] R10: fffff940008d6ff0 R11: 0000000000000001 R12: 1ffffffff3880fb3
[ 0.663845] R13: ffff88811ac00000 R14: ffffea00046b7fc0 R15: 0000000000000200
[ 0.663852] FS: 0000000000000000(0000) GS:ffff88811b400000(0000)
knlGS:0000000000000000
[ 0.663859] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 0.663864] CR2: ffff88813ffff000 CR3: 00000000ac814000 CR4: 00000000000406b0
[ 0.663869] Call Trace:
[ 0.663871] <TASK>
[ 0.663876] ? __pfx_kfence_protect+0x10/0x10
[ 0.663886] ? __pfx_set_memory_4k+0x10/0x10
[ 0.663899] kfence_init_pool+0x1ea/0x350
[ 0.663909] ? __pfx_kfence_init_pool+0x10/0x10
[ 0.663919] ? random_init+0xe9/0x13b
[ 0.663930] ? __pfx_random_init+0x10/0x10
[ 0.663936] ? _find_next_bit+0x46/0xe0
[ 0.663947] kfence_init+0x42/0x1e8
[ 0.663959] start_kernel+0x1fd/0x3a6
[ 0.663970] x86_64_start_reservations+0x28/0x2e
[ 0.663978] x86_64_start_kernel+0x96/0xa0
[ 0.663986] secondary_startup_64_no_verify+0xe0/0xeb
[ 0.664001] </TASK>
[ 0.664003] ---[ end trace 0000000000000000 ]---
[ 0.664032] ------------[ cut here ]------------
[ 0.664033] WARNING: CPU: 0 PID: 0 at mm/kfence/core.c:234
kfence_protect+0x7d/0x120
[ 0.664045] Modules linked in:
[ 0.664049] CPU: 0 PID: 0 Comm: swapper/0 Tainted: G W
6.1.0-rc5-next-20221117 #1
[ 0.664055] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996),
BIOS 1.12.0-1 04/01/2014
[ 0.664058] RIP: 0010:kfence_protect+0x7d/0x120
[ 0.664068] Code: f1 f1 c7 40 04 04 f3 f3 f3 65 48 8b 04 25 28 00
00 00 48 89 45 d8 31 c0 e8 e0 0d ba ff 48 85 c0 74 06 83 7d a0 01 74
17 0f 0b <0f> 0b c6 05 cb 97 1d 03 00 45 31 c0 c6 05 c0 97 1d 03 01 eb
4a 48
[ 0.664074] RSP: 0000:ffffffff9c407d98 EFLAGS: 00010002
[ 0.664080] RAX: ffff8880adc01020 RBX: 00000000000001ff RCX: 80000001000001e3
[ 0.664085] RDX: dffffc0000000000 RSI: ffff88811ac00000 RDI: ffff8880adc01020
[ 0.664090] RBP: ffffffff9c407e18 R08: ffffffff997c8ef8 R09: ffffea00046b7f87
[ 0.664095] R10: fffff940008d6ff0 R11: 0000000000000001 R12: 1ffffffff3880fb3
[ 0.664099] R13: ffff88811ac00000 R14: ffffea00046b7fc0 R15: 0000000000000200
[ 0.664105] FS: 0000000000000000(0000) GS:ffff88811b400000(0000)
knlGS:0000000000000000
[ 0.664112] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 0.664116] CR2: ffff88813ffff000 CR3: 00000000ac814000 CR4: 00000000000406b0
[ 0.664121] Call Trace:
[ 0.664123] <TASK>
[ 0.664126] ? __pfx_kfence_protect+0x10/0x10
[ 0.664136] ? __pfx_set_memory_4k+0x10/0x10
[ 0.664146] kfence_init_pool+0x1ea/0x350
[ 0.664156] ? __pfx_kfence_init_pool+0x10/0x10
[ 0.664166] ? random_init+0xe9/0x13b
[ 0.664172] ? __pfx_random_init+0x10/0x10
[ 0.664179] ? _find_next_bit+0x46/0xe0
[ 0.664186] kfence_init+0x42/0x1e8
[ 0.664196] start_kernel+0x1fd/0x3a6
[ 0.664205] x86_64_start_reservations+0x28/0x2e
[ 0.664213] x86_64_start_kernel+0x96/0xa0
[ 0.664221] secondary_startup_64_no_verify+0xe0/0xeb
[ 0.664232] </TASK>
[ 0.664235] ---[ end trace 0000000000000000 ]---
[ 0.664465] kfence: kfence_init failed

metadata:
git_ref: master
git_repo: https://gitlab.com/Linaro/lkft/mirrors/next/linux-next
git_sha: af37ad1e01c72483c4ee8453d9d9bac95d35f023
git_describe: next-20221117
kernel_version: 6.1.0-rc5
kernel-config: https://builds.tuxbuild.com/2Hfb6n1z0frt4iBlIvqUzjMHiLm/config
build-url: https://gitlab.com/Linaro/lkft/mirrors/next/linux-next/-/pipelines/697483979
artifact-location: https://builds.tuxbuild.com/2Hfb6n1z0frt4iBlIvqUzjMHiLm
toolchain: gcc-11


[1] https://qa-reports.linaro.org/lkft/linux-next-master/build/next-20221117/testrun/13045566/suite/kunit/test/kfence/log
[2] https://qa-reports.linaro.org/lkft/linux-next-master/build/next-20221117/testrun/13045566/suite/kunit/tests/
[3] https://qa-reports.linaro.org/lkft/linux-next-master/build/next-20221117/testrun/13045566/suite/kunit/test/test_invalid_access/history/



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

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