KCSAN: data-race in acpi_ut_exit / acpi_ut_trace_ptr

Status: moderation: reported C repro on 2026/09/27 14:16
Labels: prio:high race:benign
[Documentation on labels]
Reported-by: syzbot+f8dca90855aa9df4c3a0@syzkaller.appspotmail.com
First crash: 1h17m, last: 1h17m
▶ ▼ ✨ AI Jobs (2)
ID Workflow Result Correct Bug Created Started Finished Revision
82a9cb60 assessment-security DenialOfService: ❌ Exploitable: ❌ FilesystemTrigger: ❌ NetworkTrigger: ❌ PeripheralTrigger: ❌ RemoteTrigger: ❌ Unprivileged: ✅ UserNamespace: ✅ VMGuestTrigger: ✅ VMHostTrigger: ❌ ❓ KCSAN: data-race in acpi_ut_exit / acpi_ut_trace_ptr 2026/09/27 14:16 2026/09/27 14:16 2026/09/27 15:01 a3c7249d
51bcacbb assessment-kcsan Benign: ✅ ❓ KCSAN: data-race in acpi_ut_exit / acpi_ut_trace_ptr 2026/09/27 14:16 2026/09/27 14:16 2026/09/27 15:09 a3c7249d

Sample crash report:
==================================================================
BUG: KCSAN: data-race in acpi_ut_exit / acpi_ut_trace_ptr

read to 0xffffffff896258c8 of 4 bytes by task 3638 on cpu 0:
 acpi_ut_exit+0xaf/0xf0 drivers/acpi/acpica/utdebug.c:422
 acpi_ex_enter_interpreter+0xbb/0xd0 drivers/acpi/acpica/exutils.c:67
 acpi_ds_terminate_control_method+0x28e/0x5e0 drivers/acpi/acpica/dsmethod.c:782
 acpi_ps_parse_aml+0x68f/0xa10 drivers/acpi/acpica/psparse.c:582
 acpi_ps_execute_method+0x4af/0x660 drivers/acpi/acpica/psxface.c:190
 acpi_ns_evaluate+0x8ae/0xac0 drivers/acpi/acpica/nseval.c:205
 acpi_evaluate_object+0x41b/0x800 drivers/acpi/acpica/nsxfeval.c:354
 acpi_evaluate_integer+0x7c/0x120 drivers/acpi/utils.c:260
 status_show+0x5d/0xc0 drivers/acpi/device_sysfs.c:539
 dev_attr_show+0x3f/0xa0 drivers/base/core.c:2491
 sysfs_kf_seq_show+0x1a3/0x280 fs/sysfs/file.c:65
 kernfs_seq_show+0x82/0xa0 fs/kernfs/file.c:216
 seq_read_iter+0x2d9/0x8f0 fs/seq_file.c:231
 kernfs_fop_read_iter+0xbe/0x320 fs/kernfs/file.c:290
 new_sync_read fs/read_write.c:493 [inline]
 vfs_read+0x699/0x7c0 fs/read_write.c:574
 ksys_read+0xdc/0x1a0 fs/read_write.c:716
 __do_sys_read fs/read_write.c:725 [inline]
 __se_sys_read fs/read_write.c:723 [inline]
 __x64_sys_read+0x40/0x50 fs/read_write.c:723
 x64_sys_call+0x2135/0x2550 arch/x86/include/generated/asm/syscalls_64.h:1
 do_syscall_x64 arch/x86/entry/syscall_64.c:61 [inline]
 do_syscall_64+0x112/0x360 arch/x86/entry/syscall_64.c:84
 entry_SYSCALL_64_after_hwframe+0x77/0x7f

read-write to 0xffffffff896258c8 of 4 bytes by task 3639 on cpu 1:
 acpi_ut_trace_ptr+0x49/0x180 drivers/acpi/acpica/utdebug.c:306
 acpi_ut_get_simple_object_size+0x33/0x2f0 drivers/acpi/acpica/utobject.c:431
 acpi_ut_get_object_size+0x144/0x1d0 drivers/acpi/acpica/utobject.c:679
 acpi_evaluate_object+0x62c/0x800 drivers/acpi/acpica/nsxfeval.c:394
 acpi_evaluate_integer+0x7c/0x120 drivers/acpi/utils.c:260
 status_show+0x5d/0xc0 drivers/acpi/device_sysfs.c:539
 dev_attr_show+0x3f/0xa0 drivers/base/core.c:2491
 sysfs_kf_seq_show+0x1a3/0x280 fs/sysfs/file.c:65
 kernfs_seq_show+0x82/0xa0 fs/kernfs/file.c:216
 seq_read_iter+0x2d9/0x8f0 fs/seq_file.c:231
 kernfs_fop_read_iter+0xbe/0x320 fs/kernfs/file.c:290
 new_sync_read fs/read_write.c:493 [inline]
 vfs_read+0x699/0x7c0 fs/read_write.c:574
 ksys_read+0xdc/0x1a0 fs/read_write.c:716
 __do_sys_read fs/read_write.c:725 [inline]
 __se_sys_read fs/read_write.c:723 [inline]
 __x64_sys_read+0x40/0x50 fs/read_write.c:723
 x64_sys_call+0x2135/0x2550 arch/x86/include/generated/asm/syscalls_64.h:1
 do_syscall_x64 arch/x86/entry/syscall_64.c:61 [inline]
 do_syscall_64+0x112/0x360 arch/x86/entry/syscall_64.c:84
 entry_SYSCALL_64_after_hwframe+0x77/0x7f

value changed: 0x00000009 -> 0x00000003

Reported by Kernel Concurrency Sanitizer on:
CPU: 1 UID: 0 PID: 3639 Comm: syz-executor145 Not tainted syzkaller #0 PREEMPT(lazy) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/24/2026
==================================================================
==================================================================
BUG: KCSAN: data-race in acpi_ut_exit / acpi_ut_trace

read-write to 0xffffffff896258c8 of 4 bytes by task 3638 on cpu 0:
 acpi_ut_trace+0x44/0x180 drivers/acpi/acpica/utdebug.c:268
 acpi_evaluate_object+0x60/0x800 drivers/acpi/acpica/nsxfeval.c:173
 acpi_evaluate_integer+0x7c/0x120 drivers/acpi/utils.c:260
 status_show+0x5d/0xc0 drivers/acpi/device_sysfs.c:539
 dev_attr_show+0x3f/0xa0 drivers/base/core.c:2491
 sysfs_kf_seq_show+0x1a3/0x280 fs/sysfs/file.c:65
 kernfs_seq_show+0x82/0xa0 fs/kernfs/file.c:216
 seq_read_iter+0x2d9/0x8f0 fs/seq_file.c:231
 kernfs_fop_read_iter+0xbe/0x320 fs/kernfs/file.c:290
 new_sync_read fs/read_write.c:493 [inline]
 vfs_read+0x699/0x7c0 fs/read_write.c:574
 ksys_read+0xdc/0x1a0 fs/read_write.c:716
 __do_sys_read fs/read_write.c:725 [inline]
 __se_sys_read fs/read_write.c:723 [inline]
 __x64_sys_read+0x40/0x50 fs/read_write.c:723
 x64_sys_call+0x2135/0x2550 arch/x86/include/generated/asm/syscalls_64.h:1
 do_syscall_x64 arch/x86/entry/syscall_64.c:61 [inline]
 do_syscall_64+0x112/0x360 arch/x86/entry/syscall_64.c:84
 entry_SYSCALL_64_after_hwframe+0x77/0x7f

write to 0xffffffff896258c8 of 4 bytes by task 3639 on cpu 1:
 acpi_ut_exit+0xd5/0xf0 drivers/acpi/acpica/utdebug.c:423
 acpi_ds_method_data_init+0x506/0x510 drivers/acpi/acpica/dsmthdat.c:86
 acpi_ds_create_walk_state+0xf1/0x1c0 drivers/acpi/acpica/dswstate.c:534
 acpi_ps_execute_method+0x24f/0x660 drivers/acpi/acpica/psxface.c:134
 acpi_ns_evaluate+0x8ae/0xac0 drivers/acpi/acpica/nseval.c:205
 acpi_evaluate_object+0x41b/0x800 drivers/acpi/acpica/nsxfeval.c:354
 acpi_evaluate_integer+0x7c/0x120 drivers/acpi/utils.c:260
 status_show+0x5d/0xc0 drivers/acpi/device_sysfs.c:539
 dev_attr_show+0x3f/0xa0 drivers/base/core.c:2491
 sysfs_kf_seq_show+0x1a3/0x280 fs/sysfs/file.c:65
 kernfs_seq_show+0x82/0xa0 fs/kernfs/file.c:216
 seq_read_iter+0x2d9/0x8f0 fs/seq_file.c:231
 kernfs_fop_read_iter+0xbe/0x320 fs/kernfs/file.c:290
 new_sync_read fs/read_write.c:493 [inline]
 vfs_read+0x699/0x7c0 fs/read_write.c:574
 ksys_read+0xdc/0x1a0 fs/read_write.c:716
 __do_sys_read fs/read_write.c:725 [inline]
 __se_sys_read fs/read_write.c:723 [inline]
 __x64_sys_read+0x40/0x50 fs/read_write.c:723
 x64_sys_call+0x2135/0x2550 arch/x86/include/generated/asm/syscalls_64.h:1
 do_syscall_x64 arch/x86/entry/syscall_64.c:61 [inline]
 do_syscall_64+0x112/0x360 arch/x86/entry/syscall_64.c:84
 entry_SYSCALL_64_after_hwframe+0x77/0x7f

value changed: 0x00000005 -> 0x00000008

Reported by Kernel Concurrency Sanitizer on:
CPU: 1 UID: 0 PID: 3639 Comm: syz-executor145 Not tainted syzkaller #0 PREEMPT(lazy) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/24/2026
==================================================================
==================================================================
BUG: KCSAN: data-race in acpi_ut_status_exit / acpi_ut_trace

read-write to 0xffffffff896258c8 of 4 bytes by task 3638 on cpu 0:
 acpi_ut_trace+0x44/0x180 drivers/acpi/acpica/utdebug.c:268
 acpi_evaluate_object+0x60/0x800 drivers/acpi/acpica/nsxfeval.c:173
 acpi_evaluate_integer+0x7c/0x120 drivers/acpi/utils.c:260
 status_show+0x5d/0xc0 drivers/acpi/device_sysfs.c:539
 dev_attr_show+0x3f/0xa0 drivers/base/core.c:2491
 sysfs_kf_seq_show+0x1a3/0x280 fs/sysfs/file.c:65
 kernfs_seq_show+0x82/0xa0 fs/kernfs/file.c:216
 seq_read_iter+0x2d9/0x8f0 fs/seq_file.c:231
 kernfs_fop_read_iter+0xbe/0x320 fs/kernfs/file.c:290
 new_sync_read fs/read_write.c:493 [inline]
 vfs_read+0x699/0x7c0 fs/read_write.c:574
 ksys_read+0xdc/0x1a0 fs/read_write.c:716
 __do_sys_read fs/read_write.c:725 [inline]
 __se_sys_read fs/read_write.c:723 [inline]
 __x64_sys_read+0x40/0x50 fs/read_write.c:723
 x64_sys_call+0x2135/0x2550 arch/x86/include/generated/asm/syscalls_64.h:1
 do_syscall_x64 arch/x86/entry/syscall_64.c:61 [inline]
 do_syscall_64+0x112/0x360 arch/x86/entry/syscall_64.c:84
 entry_SYSCALL_64_after_hwframe+0x77/0x7f

read to 0xffffffff896258c8 of 4 bytes by task 3639 on cpu 1:
 acpi_ut_status_exit+0xd8/0x120 drivers/acpi/acpica/utdebug.c:471
 acpi_ds_init_aml_walk+0x174/0x310 drivers/acpi/acpica/dswstate.c:-1
 acpi_ps_execute_method+0x2bd/0x660 drivers/acpi/acpica/psxface.c:141
 acpi_ns_evaluate+0x8ae/0xac0 drivers/acpi/acpica/nseval.c:205
 acpi_evaluate_object+0x41b/0x800 drivers/acpi/acpica/nsxfeval.c:354
 acpi_evaluate_integer+0x7c/0x120 drivers/acpi/utils.c:260
 status_show+0x5d/0xc0 drivers/acpi/device_sysfs.c:539
 dev_attr_show+0x3f/0xa0 drivers/base/core.c:2491
 sysfs_kf_seq_show+0x1a3/0x280 fs/sysfs/file.c:65
 kernfs_seq_show+0x82/0xa0 fs/kernfs/file.c:216
 seq_read_iter+0x2d9/0x8f0 fs/seq_file.c:231
 kernfs_fop_read_iter+0xbe/0x320 fs/kernfs/file.c:290
 new_sync_read fs/read_write.c:493 [inline]
 vfs_read+0x699/0x7c0 fs/read_write.c:574
 ksys_read+0xdc/0x1a0 fs/read_write.c:716
 __do_sys_read fs/read_write.c:725 [inline]
 __se_sys_read fs/read_write.c:723 [inline]
 __x64_sys_read+0x40/0x50 fs/read_write.c:723
 x64_sys_call+0x2135/0x2550 arch/x86/include/generated/asm/syscalls_64.h:1
 do_syscall_x64 arch/x86/entry/syscall_64.c:61 [inline]
 do_syscall_64+0x112/0x360 arch/x86/entry/syscall_64.c:84
 entry_SYSCALL_64_after_hwframe+0x77/0x7f

value changed: 0x00000004 -> 0x00000007

Reported by Kernel Concurrency Sanitizer on:
CPU: 1 UID: 0 PID: 3639 Comm: syz-executor145 Not tainted syzkaller #0 PREEMPT(lazy) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/24/2026
==================================================================
==================================================================
BUG: KCSAN: data-race in acpi_ut_status_exit / acpi_ut_track_stack_ptr

read to 0xffffffff896258c8 of 4 bytes by task 3636 on cpu 0:
 acpi_ut_track_stack_ptr+0x5f/0xd0 drivers/acpi/acpica/utdebug.c:73
 acpi_get_handle+0x40/0x180 drivers/acpi/acpica/nsxfname.c:53
 acpi_has_method+0x46/0x80 drivers/acpi/utils.c:672
 acpi_pci_set_power_state+0x5d/0x190 drivers/pci/pci-acpi.c:1084
 platform_pci_set_power_state drivers/pci/pci.c:1091 [inline]
 pci_power_up+0x40/0x3b0 drivers/pci/pci.c:1339
 pci_pm_power_up_and_verify_state+0x29/0x130 drivers/pci/pci.c:3186
 pci_pm_default_resume_early drivers/pci/pci-driver.c:614 [inline]
 pci_pm_runtime_resume+0x5b/0x170 drivers/pci/pci-driver.c:1406
 __rpm_callback+0x2e6/0x6d0 drivers/base/power/runtime.c:406
 rpm_callback drivers/base/power/runtime.c:460 [inline]
 rpm_resume+0x94e/0xce0 drivers/base/power/runtime.c:939
 pm_runtime_forbid+0x84/0xa0 drivers/base/power/runtime.c:1672
 control_store+0x6a/0x90 drivers/base/power/sysfs.c:114
 dev_attr_store+0x4a/0x70 drivers/base/core.c:2509
 sysfs_kf_write+0xfe/0x120 fs/sysfs/file.c:145
 kernfs_fop_write_iter+0x1d2/0x2e0 fs/kernfs/file.c:345
 new_sync_write fs/read_write.c:595 [inline]
 vfs_write+0x57f/0x9a0 fs/read_write.c:687
 ksys_write+0xdc/0x1a0 fs/read_write.c:739
 __do_sys_write fs/read_write.c:750 [inline]
 __se_sys_write fs/read_write.c:747 [inline]
 __x64_sys_write+0x40/0x50 fs/read_write.c:747
 x64_sys_call+0x154e/0x2550 arch/x86/include/generated/asm/syscalls_64.h:2
 do_syscall_x64 arch/x86/entry/syscall_64.c:61 [inline]
 do_syscall_64+0x112/0x360 arch/x86/entry/syscall_64.c:84
 entry_SYSCALL_64_after_hwframe+0x77/0x7f

write to 0xffffffff896258c8 of 4 bytes by task 3639 on cpu 1:
 acpi_ut_status_exit+0xfe/0x120 drivers/acpi/acpica/utdebug.c:472
 acpi_ds_restart_control_method+0x2ce/0x2e0 drivers/acpi/acpica/dsmethod.c:-1
 acpi_ps_parse_aml+0x906/0xa10 drivers/acpi/acpica/psparse.c:-1
 acpi_ps_execute_method+0x4af/0x660 drivers/acpi/acpica/psxface.c:190
 acpi_ns_evaluate+0x8ae/0xac0 drivers/acpi/acpica/nseval.c:205
 acpi_evaluate_object+0x41b/0x800 drivers/acpi/acpica/nsxfeval.c:354
 acpi_evaluate_integer+0x7c/0x120 drivers/acpi/utils.c:260
 status_show+0x5d/0xc0 drivers/acpi/device_sysfs.c:539
 dev_attr_show+0x3f/0xa0 drivers/base/core.c:2491
 sysfs_kf_seq_show+0x1a3/0x280 fs/sysfs/file.c:65
 kernfs_seq_show+0x82/0xa0 fs/kernfs/file.c:216
 seq_read_iter+0x2d9/0x8f0 fs/seq_file.c:231
 kernfs_fop_read_iter+0xbe/0x320 fs/kernfs/file.c:290
 new_sync_read fs/read_write.c:493 [inline]
 vfs_read+0x699/0x7c0 fs/read_write.c:574
 ksys_read+0xdc/0x1a0 fs/read_write.c:716
 __do_sys_read fs/read_write.c:725 [inline]
 __se_sys_read fs/read_write.c:723 [inline]
 __x64_sys_read+0x40/0x50 fs/read_write.c:723
 x64_sys_call+0x2135/0x2550 arch/x86/include/generated/asm/syscalls_64.h:1
 do_syscall_x64 arch/x86/entry/syscall_64.c:61 [inline]
 do_syscall_64+0x112/0x360 arch/x86/entry/syscall_64.c:84
 entry_SYSCALL_64_after_hwframe+0x77/0x7f

value changed: 0x0000000b -> 0x0000000c

Reported by Kernel Concurrency Sanitizer on:
CPU: 1 UID: 0 PID: 3639 Comm: syz-executor145 Not tainted syzkaller #0 PREEMPT(lazy) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/24/2026
==================================================================
==================================================================
BUG: KCSAN: data-race in acpi_ut_status_exit / acpi_ut_trace_ptr

read-write to 0xffffffff896258c8 of 4 bytes by task 3636 on cpu 0:
 acpi_ut_trace_ptr+0x49/0x180 drivers/acpi/acpica/utdebug.c:306
 acpi_ns_get_node+0x3c/0xc0 drivers/acpi/acpica/nsutils.c:719
 acpi_get_handle+0xfd/0x180 drivers/acpi/acpica/nsxfname.c:98
 acpi_has_method+0x46/0x80 drivers/acpi/utils.c:672
 acpi_pci_set_power_state+0x5d/0x190 drivers/pci/pci-acpi.c:1084
 platform_pci_set_power_state drivers/pci/pci.c:1091 [inline]
 pci_power_up+0x40/0x3b0 drivers/pci/pci.c:1339
 pci_pm_power_up_and_verify_state+0x29/0x130 drivers/pci/pci.c:3186
 pci_pm_default_resume_early drivers/pci/pci-driver.c:614 [inline]
 pci_pm_runtime_resume+0x5b/0x170 drivers/pci/pci-driver.c:1406
 __rpm_callback+0x2e6/0x6d0 drivers/base/power/runtime.c:406
 rpm_callback drivers/base/power/runtime.c:460 [inline]
 rpm_resume+0x94e/0xce0 drivers/base/power/runtime.c:939
 pm_runtime_forbid+0x84/0xa0 drivers/base/power/runtime.c:1672
 control_store+0x6a/0x90 drivers/base/power/sysfs.c:114
 dev_attr_store+0x4a/0x70 drivers/base/core.c:2509
 sysfs_kf_write+0xfe/0x120 fs/sysfs/file.c:145
 kernfs_fop_write_iter+0x1d2/0x2e0 fs/kernfs/file.c:345
 new_sync_write fs/read_write.c:595 [inline]
 vfs_write+0x57f/0x9a0 fs/read_write.c:687
 ksys_write+0xdc/0x1a0 fs/read_write.c:739
 __do_sys_write fs/read_write.c:750 [inline]
 __se_sys_write fs/read_write.c:747 [inline]
 __x64_sys_write+0x40/0x50 fs/read_write.c:747
 x64_sys_call+0x154e/0x2550 arch/x86/include/generated/asm/syscalls_64.h:2
 do_syscall_x64 arch/x86/entry/syscall_64.c:61 [inline]
 do_syscall_64+0x112/0x360 arch/x86/entry/syscall_64.c:84
 entry_SYSCALL_64_after_hwframe+0x77/0x7f

read to 0xffffffff896258c8 of 4 bytes by task 3639 on cpu 1:
 acpi_ut_status_exit+0xd8/0x120 drivers/acpi/acpica/utdebug.c:471
 acpi_ps_next_parse_state+0x2fb/0x310 drivers/acpi/acpica/psparse.c:406
 acpi_ps_complete_op+0x1d0/0x780 drivers/acpi/acpica/psobject.c:484
 acpi_ps_parse_loop+0x1104/0x1520 drivers/acpi/acpica/psloop.c:580
 acpi_ps_parse_aml+0x2b0/0xa10 drivers/acpi/acpica/psparse.c:489
 acpi_ps_execute_method+0x4af/0x660 drivers/acpi/acpica/psxface.c:190
 acpi_ns_evaluate+0x8ae/0xac0 drivers/acpi/acpica/nseval.c:205
 acpi_evaluate_object+0x41b/0x800 drivers/acpi/acpica/nsxfeval.c:354
 acpi_evaluate_integer+0x7c/0x120 drivers/acpi/utils.c:260
 status_show+0x5d/0xc0 drivers/acpi/device_sysfs.c:539
 dev_attr_show+0x3f/0xa0 drivers/base/core.c:2491
 sysfs_kf_seq_show+0x1a3/0x280 fs/sysfs/file.c:65
 kernfs_seq_show+0x82/0xa0 fs/kernfs/file.c:216
 seq_read_iter+0x2d9/0x8f0 fs/seq_file.c:231
 kernfs_fop_read_iter+0xbe/0x320 fs/kernfs/file.c:290
 new_sync_read fs/read_write.c:493 [inline]
 vfs_read+0x699/0x7c0 fs/read_write.c:574
 ksys_read+0xdc/0x1a0 fs/read_write.c:716
 __do_sys_read fs/read_write.c:725 [inline]
 __se_sys_read fs/read_write.c:723 [inline]
 __x64_sys_read+0x40/0x50 fs/read_write.c:723
 x64_sys_call+0x2135/0x2550 arch/x86/include/generated/asm/syscalls_64.h:1
 do_syscall_x64 arch/x86/entry/syscall_64.c:61 [inline]
 do_syscall_64+0x112/0x360 arch/x86/entry/syscall_64.c:84
 entry_SYSCALL_64_after_hwframe+0x77/0x7f

value changed: 0x0000000b -> 0x0000000c

Reported by Kernel Concurrency Sanitizer on:
CPU: 1 UID: 0 PID: 3639 Comm: syz-executor145 Not tainted syzkaller #0 PREEMPT(lazy) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/24/2026
==================================================================
==================================================================
BUG: KCSAN: data-race in acpi_ut_status_exit / acpi_ut_trace

read-write to 0xffffffff896258c8 of 4 bytes by task 3638 on cpu 0:
 acpi_ut_trace+0x44/0x180 drivers/acpi/acpica/utdebug.c:268
 acpi_evaluate_object+0x60/0x800 drivers/acpi/acpica/nsxfeval.c:173
 acpi_evaluate_integer+0x7c/0x120 drivers/acpi/utils.c:260
 status_show+0x5d/0xc0 drivers/acpi/device_sysfs.c:539
 dev_attr_show+0x3f/0xa0 drivers/base/core.c:2491
 sysfs_kf_seq_show+0x1a3/0x280 fs/sysfs/file.c:65
 kernfs_seq_show+0x82/0xa0 fs/kernfs/file.c:216
 seq_read_iter+0x2d9/0x8f0 fs/seq_file.c:231
 kernfs_fop_read_iter+0xbe/0x320 fs/kernfs/file.c:290
 new_sync_read fs/read_write.c:493 [inline]
 vfs_read+0x699/0x7c0 fs/read_write.c:574
 ksys_read+0xdc/0x1a0 fs/read_write.c:716
 __do_sys_read fs/read_write.c:725 [inline]
 __se_sys_read fs/read_write.c:723 [inline]
 __x64_sys_read+0x40/0x50 fs/read_write.c:723
 x64_sys_call+0x2135/0x2550 arch/x86/include/generated/asm/syscalls_64.h:1
 do_syscall_x64 arch/x86/entry/syscall_64.c:61 [inline]
 do_syscall_64+0x112/0x360 arch/x86/entry/syscall_64.c:84
 entry_SYSCALL_64_after_hwframe+0x77/0x7f

write to 0xffffffff896258c8 of 4 bytes by task 3639 on cpu 1:
 acpi_ut_status_exit+0xfe/0x120 drivers/acpi/acpica/utdebug.c:472
 acpi_ds_init_aml_walk+0x174/0x310 drivers/acpi/acpica/dswstate.c:-1
 acpi_ps_execute_method+0x2bd/0x660 drivers/acpi/acpica/psxface.c:141
 acpi_ns_evaluate+0x8ae/0xac0 drivers/acpi/acpica/nseval.c:205
 acpi_evaluate_object+0x41b/0x800 drivers/acpi/acpica/nsxfeval.c:354
 acpi_evaluate_integer+0x7c/0x120 drivers/acpi/utils.c:260
 status_show+0x5d/0xc0 drivers/acpi/device_sysfs.c:539
 dev_attr_show+0x3f/0xa0 drivers/base/core.c:2491
 sysfs_kf_seq_show+0x1a3/0x280 fs/sysfs/file.c:65
 kernfs_seq_show+0x82/0xa0 fs/kernfs/file.c:216
 seq_read_iter+0x2d9/0x8f0 fs/seq_file.c:231
 kernfs_fop_read_iter+0xbe/0x320 fs/kernfs/file.c:290
 new_sync_read fs/read_write.c:493 [inline]
 vfs_read+0x699/0x7c0 fs/read_write.c:574
 ksys_read+0xdc/0x1a0 fs/read_write.c:716
 __do_sys_read fs/read_write.c:725 [inline]
 __se_sys_read fs/read_write.c:723 [inline]
 __x64_sys_read+0x40/0x50 fs/read_write.c:723
 x64_sys_call+0x2135/0x2550 arch/x86/include/generated/asm/syscalls_64.h:1
 do_syscall_x64 arch/x86/entry/syscall_64.c:61 [inline]
 do_syscall_64+0x112/0x360 arch/x86/entry/syscall_64.c:84
 entry_SYSCALL_64_after_hwframe+0x77/0x7f

value changed: 0x00000006 -> 0x0000000a

Reported by Kernel Concurrency Sanitizer on:
CPU: 1 UID: 0 PID: 3639 Comm: syz-executor145 Not tainted syzkaller #0 PREEMPT(lazy) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/24/2026
==================================================================

Crashes (1):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2026/09/27 14:15 git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git fddfc3ec3179 e12281bd .config console log report C ci2-upstream-kcsan-gce KCSAN: data-race in acpi_ut_exit / acpi_ut_trace_ptr
* Struck through repros no longer work on HEAD.