Hello Colin, I can see this issue with 5.0 kernel (5.0.0-47.51~18.04.1)
as well, with the same node hotdog-kernel.
Do you think if we should fix this in 5.0 as well?
Thanks
sysfs FAILED (kernel oopsed)
[ 1108.615397] Unable to handle kernel paging request at virtual address
ffff000046afa6a6
[ 1108.617127] Unable to handle kernel paging request at virtual address
ffff000046afd2d7
[ 1108.623317] Mem abort info:
[ 1108.627466] Unable to handle kernel paging request at virtual address
ffff000046affffd
[ 1108.627469] Mem abort info:
[ 1108.627470] ESR = 0x96000021
[ 1108.627473] Exception class = DABT (current EL), IL = 32 bits
[ 1108.627477] SET = 0, FnV = 0
[ 1108.627480] EA = 0, S1PTW = 0
[ 1108.627482] Data abort info:
[ 1108.627485] ISV = 0, ISS = 0x00000021
[ 1108.627487] CM = 0, WnR = 0
[ 1108.627490] swapper pgtable: 4k pages, 48-bit VAs, pgdp=00000000815ac000
[ 1108.627495] [ffff000046affffd] pgd=000000bffcfff003, pud=0000009f28e05003,
pmd=0000009de53f9003, pte=006800008028f703
[ 1108.627507] Internal error: Oops: 96000021 [#1] SMP
[ 1108.627515] Modules linked in: unix_diag binfmt_misc snd_seq snd_seq_device
snd_timer snd soundcore userio cuse hci_vhci bluetooth ecdh_generic
vfio_iommu_type1 vfio uhid vhost_vsock vmw_vsock_virtio_transport_common vsock
vhost_net vhost tap dccp_ipv4 dccp atm algif_rng aegis128 aegis128l aegis256
morus1280 morus640 algif_aead anubis fcrypt khazad seed sm4_generic tea
crc32_generic md4 michael_mic nhpoly1305_neon nhpoly1305 poly1305_generic
rmd128 rmd160 rmd256 rmd320 sha3_generic sm3_generic streebog_generic tgr192
wp512 algif_hash blowfish_generic blowfish_common cast5_generic des_generic
salsa20_generic chacha_neon chacha_generic camellia_generic cast6_generic
cast_common serpent_generic twofish_generic twofish_common algif_skcipher
af_alg nls_iso8859_1 ipmi_ssif joydev input_leds ipmi_devintf ipmi_msghandler
thunderx2_pmu sch_fq_codel ib_iser rdma_cm iw_cm ib_cm ib_core iscsi_tcp
libiscsi_tcp libiscsi scsi_transport_iscsi ip_tables x_tables autofs4 btrfs
zstd_compress raid10 raid456
[ 1108.627576] async_raid6_recov async_memcpy async_pq async_xor async_tx xor
xor_neon raid6_pq libcrc32c raid1 raid0 multipath linear i2c_smbus aes_ce_blk
aes_ce_cipher uas ast i2c_algo_bit ttm drm_kms_helper syscopyarea crct10dif_ce
usb_storage ghash_ce sysfillrect qede sha2_ce sysimgblt mpt3sas fb_sys_fops qed
sha256_arm64 sha1_ce raid_class drm scsi_transport_sas ahci crc8 gpio_xlp
i2c_xlp9xx hid_generic usbhid hid aes_neon_bs aes_neon_blk crypto_simd cryptd
aes_arm64
[ 1108.627607] Process stress-ng-sysfs (pid: 203940, stack limit =
0x0000000047d7ff87)
[ 1108.627612] CPU: 93 PID: 203940 Comm: stress-ng-sysfs Not tainted
5.0.0-47-generic #51~18.04.1-Ubuntu
[ 1108.627614] Hardware name: To be filled by O.E.M. Saber/Saber, BIOS
0ACKL027 07/01/2019
[ 1108.627616] pstate: 80400009 (Nzcv daif +PAN -UAO)
[ 1108.627623] pc : __memcpy+0x9c/0x180
[ 1108.627629] lr : memory_read_from_buffer+0x64/0x88
[ 1108.627630] sp : ffff000059933c90
[ 1108.627631] x29: ffff000059933c90 x28: ffff809e4d35ac40
[ 1108.627634] x27: 0000000000000000 x26: 0000000000000000
[ 1108.627636] x25: 0000000056000000 x24: ffff000046af0000
[ 1108.627637] x23: ffff809ee6fad000 x22: 0000000000000003
[ 1108.627639] x21: ffff000059933d08 x20: 0000000000000003
[ 1108.627640] x19: 0000000000010000 x18: 0000000000000000
[ 1108.627641] x17: 0000000000000000 x16: 0000000000000000
[ 1108.627643] x15: 0000000000000000 x14: 0000000000000000
[ 1108.627644] x13: 0000000000000000 x12: 0000000000000000
[ 1108.627645] x11: 0000000000000000 x10: 0000000000000000
[ 1108.627647] x9 : 0000000000000000 x8 : 0000000000000000
[ 1108.627648] x7 : ffff0000106cd1d8 x6 : ffff809ee6fad000
[ 1108.627650] x5 : 0000000000000003 x4 : 0000000000010000
[ 1108.627651] x3 : ffff000046af0000 x2 : 0000000000000003
[ 1108.627653] x1 : ffff000046affffd x0 : ffff809ee6fad000
[ 1108.627655] Call trace:
[ 1108.627657] __memcpy+0x9c/0x180
[ 1108.627661] acpi_data_show+0x54/0x80
[ 1108.627664] sysfs_kf_bin_read+0x6c/0xa8
[ 1108.627669] kernfs_fop_read+0xa8/0x228
[ 1108.627674] __vfs_read+0x48/0x80
[ 1108.627676] vfs_read+0x94/0x150
[ 1108.627678] ksys_read+0x74/0xf0
[ 1108.627680] __arm64_sys_read+0x24/0x30
[ 1108.627686] el0_svc_common+0x88/0x180
[ 1108.627688] el0_svc_handler+0x38/0x78
[ 1108.627692] el0_svc+0x8/0xc
[ 1108.627695] Code: 36100062 b8404423 b80044c3 36080062 (78402423)
[ 1108.627698] ---[ end trace 3ac0a382f7e22655 ]---
[ 1108.631236] Mem abort info:
[ 1108.634018] ESR = 0x96000021
[ 1108.634020] Exception class = DABT (current EL), IL = 32 bits
[ 1108.634021] SET = 0, FnV = 0
[ 1108.634025] EA = 0, S1PTW = 0
[ 1108.641929] ESR = 0x96000021
[ 1108.641930] Exception class = DABT (current EL), IL = 32 bits
[ 1108.641931] SET = 0, FnV = 0
[ 1108.641934] EA = 0, S1PTW = 0
[ 1108.644717] Data abort info:
[ 1108.644718] ISV = 0, ISS = 0x00000021
[ 1108.644719] CM = 0, WnR = 0
[ 1108.644720] swapper pgtable: 4k pages, 48-bit VAs, pgdp=00000000815ac000
[ 1108.644724] [ffff000046afa6a6] pgd=000000bffcfff003, pud=0000009f28e05003,
pmd=0000009de53f9003, pte=006800008028a703
[ 1108.647767] Data abort info:
[ 1108.647768] ISV = 0, ISS = 0x00000021
[ 1108.647769] CM = 0, WnR = 0
[ 1108.647773] swapper pgtable: 4k pages, 48-bit VAs, pgdp=00000000815ac000
[ 1108.653681] Internal error: Oops: 96000021 [#2] SMP
[ 1108.653684] Modules linked in: unix_diag binfmt_misc snd_seq snd_seq_device
snd_timer snd soundcore userio cuse hci_vhci bluetooth ecdh_generic
vfio_iommu_type1 vfio uhid vhost_vsock vmw_vsock_virtio_transport_common vsock
vhost_net vhost tap dccp_ipv4 dccp atm algif_rng aegis128 aegis128l aegis256
morus1280 morus640 algif_aead anubis fcrypt khazad seed sm4_generic tea
crc32_generic md4 michael_mic nhpoly1305_neon nhpoly1305 poly1305_generic
rmd128 rmd160 rmd256 rmd320 sha3_generic sm3_generic streebog_generic tgr192
wp512 algif_hash blowfish_generic blowfish_common cast5_generic des_generic
salsa20_generic chacha_neon chacha_generic camellia_generic cast6_generic
cast_common serpent_generic twofish_generic twofish_common algif_skcipher
af_alg nls_iso8859_1 ipmi_ssif joydev input_leds ipmi_devintf ipmi_msghandler
thunderx2_pmu sch_fq_codel ib_iser rdma_cm iw_cm ib_cm ib_core iscsi_tcp
libiscsi_tcp libiscsi scsi_transport_iscsi ip_tables x_tables autofs4 btrfs
zstd_compress raid10 raid456
[ 1108.653717] async_raid6_recov
[ 1108.656728] [ffff000046afd2d7] pgd=000000bffcfff003
[ 1108.659851] async_memcpy async_pq async_xor async_tx xor xor_neon raid6_pq
libcrc32c raid1 raid0 multipath linear i2c_smbus aes_ce_blk aes_ce_cipher uas
ast i2c_algo_bit ttm drm_kms_helper syscopyarea crct10dif_ce usb_storage
ghash_ce sysfillrect qede sha2_ce sysimgblt mpt3sas fb_sys_fops qed
sha256_arm64 sha1_ce raid_class drm scsi_transport_sas ahci crc8 gpio_xlp
i2c_xlp9xx hid_generic usbhid hid aes_neon_bs aes_neon_blk crypto_simd cryptd
aes_arm64
[ 1108.662734] , pud=0000009f28e05003, pmd=0000009de53f9003,
pte=006800008028d703
[ 1108.666553] Process stress-ng-sysfs (pid: 203926, stack limit =
0x00000000279f28a6)
[ 1108.666556] CPU: 91 PID: 203926 Comm: stress-ng-sysfs Tainted: G D
5.0.0-47-generic #51~18.04.1-Ubuntu
[ 1108.666557] Hardware name: To be filled by O.E.M. Saber/Saber, BIOS
0ACKL027 07/01/2019
[ 1108.666558] pstate: 80400009 (Nzcv daif +PAN -UAO)
[ 1108.666562] pc : __memcpy+0x90/0x180
[ 1108.666567] lr : memory_read_from_buffer+0x64/0x88
[ 1108.840632] Unable to handle kernel paging request at virtual address
ffff000046af8aed
[ 1108.842368] Unable to handle kernel paging request at virtual address
ffff000046af171f
[ 1108.842372] Mem abort info:
[ 1108.842373] ESR = 0x96000021
[ 1108.842376] Exception class = DABT (current EL), IL = 32 bits
[ 1108.842378] SET = 0, FnV = 0
[ 1108.842380] EA = 0, S1PTW = 0
[ 1108.842384] Data abort info:
[ 1108.842386] ISV = 0, ISS = 0x00000021
[ 1108.842390] CM = 0, WnR = 0
[ 1108.842395] swapper pgtable: 4k pages, 48-bit VAs, pgdp=00000000815ac000
[ 1108.842398] [ffff000046af171f] pgd=000000bffcfff003, pud=0000009f28e05003,
pmd=0000009de53f9003, pte=0068000080281703
[ 1108.845483] sp : ffff00004a093c90
[ 1108.845484] x29: ffff00004a093c90 x28: ffff809e4d358ec0
[ 1108.845486] x27: 0000000000000000 x26: 0000000000000000
[ 1108.845487] x25: 0000000056000000 x24: ffff000046af0000
[ 1108.845489] x23: ffff809d53f70600 x22: 0000000000000007
[ 1108.845490] x21: ffff00004a093d08 x20: 0000000000000007
[ 1108.845492] x19: 000000000000a6ad x18: 0000000000000000
[ 1108.850277] Mem abort info:
[ 1108.853833] x17: 0000000000000000 x16: 0000000000000000
[ 1108.858628] ESR = 0x96000021
[ 1108.861909] x15: 0000000000000000 x14: 0000000000000000
[ 1108.867216] Exception class = DABT (current EL), IL = 32 bits
[ 1108.872503] x13: 0000000000000000 x12: 0000000000000000
[ 1108.872504] x11: 0000000000000000 x10: 0000000000000000
[ 1108.872506] x9 : 0000000000000000 x8 : 0000000000000000
[ 1108.872507] x7 : ffff0000106cd1d8 x6 : ffff809d53f70600
[ 1108.872508] x5 : 0000000000000007 x4 : 0000000000010000
[ 1108.872510] x3 : ffff000046af0000 x2 : 0000000000000007
[ 1108.872514] x1 : ffff000046afa6a6 x0 : ffff809d53f70600
[ 1108.877816] SET = 0, FnV = 0
[ 1108.883108] Call trace:
[ 1108.883113] __memcpy+0x90/0x180
[ 1108.883116] acpi_data_show+0x54/0x80
[ 1108.883119] sysfs_kf_bin_read+0x6c/0xa8
[ 1108.883124] kernfs_fop_read+0xa8/0x228
[ 1108.888421] EA = 0, S1PTW = 0
[ 1108.893718] __vfs_read+0x48/0x80
[ 1108.893719] vfs_read+0x94/0x150
[ 1108.893721] ksys_read+0x74/0xf0
[ 1108.893722] __arm64_sys_read+0x24/0x30
[ 1108.893727] el0_svc_common+0x88/0x180
[ 1108.893728] el0_svc_handler+0x38/0x78
[ 1108.893731] el0_svc+0x8/0xc
[ 1108.893736] Code: 36180062 f8408423 f80084c3 36100062 (b8404423)
[ 1108.899039] Data abort info:
[ 1108.904332] ---[ end trace 3ac0a382f7e22656 ]---
--
You received this bug notification because you are a member of Kernel
Packages, which is subscribed to linux in Ubuntu.
https://bugs.launchpad.net/bugs/1866772
Title:
Sys oopsed with sysfs test in ubuntu_stress_smoke_test on X-hwe ARM64
Status in Stress-ng:
New
Status in ubuntu-kernel-tests:
In Progress
Status in linux package in Ubuntu:
Fix Released
Status in linux source package in Bionic:
Fix Committed
Status in linux source package in Eoan:
Fix Committed
Status in linux source package in Focal:
Fix Released
Bug description:
== SRU Request [ BIONIC, EOAN, FOCAL ] ==
Reading /sys/firmware/acpi/tables/data/BERT as root at at odd byte
offset will cause an oops. This is because the source address is I/O
mapped and this needs to be read with an I/O memcpy rather than an
memcpy.
== Fix ==
The fix is upstream (linux-next) commit that will land in 5.7, the
backport to bionic, eoan and focal is just a minor context wiggle.
commit 08c07cefb3042a55bc9f8243814b504d5eff93f3
Author: Colin Ian King <colin.k...@canonical.com>
Date: Thu Mar 12 11:13:45 2020 +0000
ACPI: sysfs: copy ACPI data using io memory copying
== Test ==
Running on hotdog with the reproducer below (run as root):
#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <unistd.h>
#include <errno.h>
#include <stdio.h>
#include <string.h>
int main(void)
{
int fd;
char buffer[3];
ssize_t n;
fd = open("/sys/firmware/acpi/tables/data/BERT", O_RDONLY);
if (fd < 0) {
fprintf(stderr, "open failed: %d (%s)\n", errno,
strerror(errno));
return -1;
}
do {
n = read(fd, buffer, sizeof(buffer));
} while (n > 0);
return 0;
}
Without the fix it will oops. With the fix it works OK.
== Regession Potential ==
This only affects the reading of the ACPI BERT table from /sys as root
so it is limited in scope to just a very narrow use case. Normally the
BERT table is just handled by the kernel, so access to this table is
just for debugging purposes.
-----------------------
Issue found on new ARM64 node "hotdog" 4.15.0-91.92~16.04.1
Failed 2 of 2 attempts.
Test suite HEAD SHA1: 3f43e81
sysfs STARTING
sysfs RETURNED 0
sysfs FAILED (kernel oopsed)
[ 1075.760640] Unable to handle kernel paging request at virtual address
ffff00004a70072a
[ 1075.763319] Unable to handle kernel paging request at virtual address
ffff00004a70e4ba
[ 1075.768563] Mem abort info:
[ 1075.768566] ESR = 0x96000021
[ 1075.768568] Exception class = DABT (current EL), IL = 32 bits
[ 1075.768569] SET = 0, FnV = 0
[ 1075.768570] EA = 0, S1PTW = 0
[ 1075.768571] Data abort info:
[ 1075.768577] ISV = 0, ISS = 0x00000021
[ 1075.776489] Mem abort info:
[ 1075.776491] ESR = 0x96000021
[ 1075.776493] Exception class = DABT (current EL), IL = 32 bits
[ 1075.776494] SET = 0, FnV = 0
[ 1075.776495] EA = 0, S1PTW = 0
[ 1075.776496] Data abort info:
[ 1075.776500] ISV = 0, ISS = 0x00000021
[ 1075.779284] CM = 0, WnR = 0
[ 1075.779288] swapper pgtable: 4k pages, 48-bit VAs, pgd = 00000000facfed4f
[ 1075.779290] [ffff00004a70072a] *pgd=000000bffcffe003,
*pud=0000009f6122c003, *pmd=000000bf5adf4003, *pte=0068000080280703
[ 1075.782342] CM = 0, WnR = 0
[ 1075.782346] swapper pgtable: 4k pages, 48-bit VAs, pgd = 00000000facfed4f
[ 1075.782352] [ffff00004a70e4ba] *pgd=000000bffcffe003,
*pud=0000009f6122c003, *pmd=000000bf5adf4003, *pte=006800008028e703
[ 1075.788262] Internal error: Oops: 96000021 [#2] SMP
[ 1075.788269] Modules linked in: unix_diag binfmt_misc snd_seq
snd_seq_device snd_timer snd soundcore userio vfio_iommu_type1 vfio hci_vhci
bluetooth ecdh_generic uhid cuse vhost_vsock vmw_vsock_virtio_transport_common
vhost_net vhost vsock tap dccp_ipv4 dccp ipx p8023 atm psnap p8022 llc
algif_rng algif_aead anubis fcrypt khazad seed tea md4 michael_mic
poly1305_generic rmd128 rmd160 rmd256 rmd320 sha3_generic sm3_generic tgr192
wp512 algif_hash chacha20_neon chacha20_generic blowfish_generic
blowfish_common cast5_generic des_generic salsa20_generic camellia_generic
cast6_generic cast_common serpent_generic twofish_generic twofish_common
algif_skcipher af_alg nls_iso8859_1 ipmi_ssif ipmi_devintf joydev input_leds
ipmi_msghandler shpchp i2c_xlp9xx(+) thunderx2_pmu ib_iser rdma_cm iw_cm ib_cm
ib_core
[ 1075.942470] iscsi_tcp libiscsi_tcp libiscsi scsi_transport_iscsi autofs4
btrfs zstd_compress raid10 raid456 async_raid6_recov async_memcpy async_pq
async_xor async_tx xor raid6_pq libcrc32c raid1 raid0 multipath linear
hid_generic usbhid hid uas usb_storage aes_ce_blk aes_ce_cipher crc32_ce qede
ast i2c_algo_bit crct10dif_ce ptp ghash_ce ttm drm_kms_helper sha2_ce pps_core
syscopyarea sysfillrect sysimgblt fb_sys_fops sha256_arm64 sha1_ce mpt3sas qed
drm raid_class scsi_transport_sas ahci libahci gpio_xlp aes_neon_bs
aes_neon_blk crypto_simd cryptd aes_arm64
[ 1075.991997] Process stress-ng-sysfs (pid: 108395, stack limit =
0x000000009cb607b8)
[ 1075.999643] CPU: 100 PID: 108395 Comm: stress-ng-sysfs Tainted: G D
4.15.0-91-generic #92~16.04.1-Ubuntu
[ 1076.010324] Hardware name: To be filled by O.E.M. Saber/Saber, BIOS
0ACKL027 07/01/2019
[ 1076.018314] pstate: 80400009 (Nzcv daif +PAN -UAO)
[ 1076.023096] pc : __memcpy+0x84/0x180
[ 1076.026663] lr : memory_read_from_buffer+0x64/0x88
[ 1076.031441] sp : ffff00003ea2bd10
[ 1076.034743] x29: ffff00003ea2bd10 x28: ffff80be4d85cb00
[ 1076.040042] x27: ffff000008b42000 x26: 000000000000003f
[ 1076.045342] x25: 0000000000000124 x24: ffff00004a700000
[ 1076.050643] x23: ffff809e3a7e8500 x22: 000000000000000a
[ 1076.055942] x21: ffff00003ea2bd88 x20: 000000000000000a
[ 1076.061240] x19: 0000000000000734 x18: 0000000000000014
[ 1076.066540] x17: 0000ffffaf4e1a58 x16: ffff0000082e8e28
[ 1076.071839] x15: 00002d88734750e0 x14: 00181a0596c27059
[ 1076.077138] x13: 00000003e8000000 x12: 0000000000000018
[ 1076.082436] x11: 000000000006372e x10: 000000005e66c174
[ 1076.087735] x9 : 003b9aca00000000 x8 : 000000000000003f
[ 1076.093034] x7 : ffff000008645490 x6 : ffff809e3a7e8500
[ 1076.098333] x5 : 000000000000000a x4 : 0000000000010000
[ 1076.103633] x3 : ffff00004a700000 x2 : 000000000000000a
[ 1076.108932] x1 : ffff00004a70072a x0 : ffff809e3a7e8500
[ 1076.114231] Call trace:
[ 1076.116668] __memcpy+0x84/0x180
[ 1076.119887] acpi_data_show+0x54/0x80
[ 1076.123541] sysfs_kf_bin_read+0x6c/0xa8
[ 1076.127451] kernfs_fop_read+0xa4/0x1e0
[ 1076.131274] __vfs_read+0x48/0x90
[ 1076.134577] vfs_read+0x94/0x150
[ 1076.137792] SyS_read+0x74/0xf0
[ 1076.140923] el0_svc_naked+0x30/0x34
[ 1076.144487] Code: a88120c7 a8c12027 a88120c7 36180062 (f8408423)
[ 1076.150570] ---[ end trace 496ae41e9716bef2 ]---
[ 1076.155180] Internal error: Oops: 96000021 [#3] SMP
[ 1076.160054] Modules linked in: unix_diag binfmt_misc snd_seq
snd_seq_device snd_timer snd soundcore userio vfio_iommu_type1 vfio hci_vhci
bluetooth ecdh_generic uhid cuse vhost_vsock vmw_vsock_virtio_transport_common
vhost_net vhost vsock tap dccp_ipv4 dccp ipx p8023 atm psnap p8022 llc
algif_rng algif_aead anubis fcrypt khazad seed tea md4 michael_mic
poly1305_generic rmd128 rmd160 rmd256 rmd320 sha3_generic sm3_generic tgr192
wp512 algif_hash chacha20_neon chacha20_generic blowfish_generic
blowfish_common cast5_generic des_generic salsa20_generic camellia_generic
cast6_generic cast_common serpent_generic twofish_generic twofish_common
algif_skcipher af_alg nls_iso8859_1 ipmi_ssif ipmi_devintf joydev input_leds
ipmi_msghandler shpchp i2c_xlp9xx(+) thunderx2_pmu ib_iser rdma_cm iw_cm ib_cm
ib_core
[ 1076.230688] iscsi_tcp libiscsi_tcp libiscsi scsi_transport_iscsi autofs4
btrfs zstd_compress raid10 raid456 async_raid6_recov async_memcpy async_pq
async_xor async_tx xor raid6_pq libcrc32c raid1 raid0 multipath linear
hid_generic usbhid hid uas usb_storage aes_ce_blk aes_ce_cipher crc32_ce qede
ast i2c_algo_bit crct10dif_ce ptp ghash_ce ttm drm_kms_helper sha2_ce pps_core
syscopyarea sysfillrect sysimgblt fb_sys_fops sha256_arm64 sha1_ce mpt3sas qed
drm raid_class scsi_transport_sas ahci libahci gpio_xlp aes_neon_bs
aes_neon_blk crypto_simd cryptd aes_arm64
[ 1076.280211] Process stress-ng-sysfs (pid: 108405, stack limit =
0x00000000081889d7)
[ 1076.287856] CPU: 155 PID: 108405 Comm: stress-ng-sysfs Tainted: G D
4.15.0-91-generic #92~16.04.1-Ubuntu
[ 1076.298538] Hardware name: To be filled by O.E.M. Saber/Saber, BIOS
0ACKL027 07/01/2019
[ 1076.306530] pstate: 80400009 (Nzcv daif +PAN -UAO)
[ 1076.311319] pc : __memcpy+0x84/0x180
[ 1076.314890] lr : memory_read_from_buffer+0x64/0x88
[ 1076.319667] sp : ffff00003eea3d10
[ 1076.322969] x29: ffff00003eea3d10 x28: ffff80be4d858000
[ 1076.328269] x27: ffff000008b42000 x26: 000000000000003f
[ 1076.333568] x25: 0000000000000124 x24: ffff00004a700000
[ 1076.338868] x23: ffff80bec6fa7400 x22: 000000000000000d
[ 1076.344167] x21: ffff00003eea3d88 x20: 000000000000000d
[ 1076.349467] x19: 000000000000e4c7 x18: 0000000000000014
[ 1076.354767] x17: 0000ffffaf4e1a58 x16: ffff0000082e8e28
[ 1076.360068] x15: 0000566c10765956 x14: 00181a0596c27059
[ 1076.365368] x13: 00000003e8000000 x12: 0000000000000018
[ 1076.370667] x11: 00000000000641a6 x10: 000000005e66c174
[ 1076.375966] x9 : 003b9aca00000000 x8 : 000000000000003f
[ 1076.381265] x7 : ffff000008645490 x6 : ffff80bec6fa7400
[ 1076.386564] x5 : 000000000000000d x4 : 0000000000010000
[ 1076.391864] x3 : ffff00004a700000 x2 : 000000000000000d
[ 1076.397163] x1 : ffff00004a70e4ba x0 : ffff80bec6fa7400
[ 1076.402463] Call trace:
[ 1076.404901] __memcpy+0x84/0x180
[ 1076.408125] acpi_data_show+0x54/0x80
[ 1076.411785] sysfs_kf_bin_read+0x6c/0xa8
[ 1076.415696] kernfs_fop_read+0xa4/0x1e0
[ 1076.419520] __vfs_read+0x48/0x90
[ 1076.422823] vfs_read+0x94/0x150
[ 1076.426038] SyS_read+0x74/0xf0
[ 1076.429171] el0_svc_naked+0x30/0x34
[ 1076.432736] Code: a88120c7 a8c12027 a88120c7 36180062 (f8408423)
[ 1076.438818] ---[ end trace 496ae41e9716bef3 ]---
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