syzbot
KCSAN: data-race in acpi_ut_trace / acpi_ut_trace_ptr
Status:
moderation: reported C repro on 2026/08/02 02:47
Subsystems:
acpica
Labels:
race:benign
prio:low
[Documentation on labels]
Reported-by: syzbot+79f31dc9d98920e00d02@syzkaller.appspotmail.com
First crash: 92d, last: 30d
Sample crash report:
==================================================================
BUG: KCSAN: data-race in acpi_ut_trace / acpi_ut_trace_ptr
read-write to 0xffffffff896268c8 of 4 bytes by task 3642 on cpu 1:
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-write to 0xffffffff896268c8 of 4 bytes by task 3648 on cpu 0:
acpi_ut_trace_ptr+0x49/0x180 drivers/acpi/acpica/utdebug.c:306
acpi_ps_complete_this_op+0x39/0x4e0 drivers/acpi/acpica/psparse.c:115
acpi_ps_complete_op+0x6f/0x780 drivers/acpi/acpica/psobject.c:451
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: 0x0000001b -> 0x0000001e
Reported by Kernel Concurrency Sanitizer on:
CPU: 0 UID: 0 PID: 3648 Comm: syz-executor109 Not tainted syzkaller #0 PREEMPT(lazy)
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/16/2026
==================================================================
==================================================================
BUG: KCSAN: data-race in acpi_ut_exit / acpi_ut_trace
read-write to 0xffffffff896268c8 of 4 bytes by task 3647 on cpu 1:
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 0xffffffff896268c8 of 4 bytes by task 3648 on cpu 0:
acpi_ut_exit+0xd5/0xf0 drivers/acpi/acpica/utdebug.c:423
acpi_ds_delete_walk_state+0x20c/0x220 include/acpi/platform/aclinuxex.h:-1
acpi_ps_parse_aml+0x946/0xa10 drivers/acpi/acpica/psparse.c:691
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: 0x00000009 -> 0x0000000c
Reported by Kernel Concurrency Sanitizer on:
CPU: 0 UID: 0 PID: 3648 Comm: syz-executor109 Not tainted syzkaller #0 PREEMPT(lazy)
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/16/2026
==================================================================
==================================================================
BUG: KCSAN: data-race in acpi_ut_trace / acpi_ut_trace
read-write to 0xffffffff896268c8 of 4 bytes by task 3644 on cpu 1:
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-write to 0xffffffff896268c8 of 4 bytes by task 3648 on cpu 0:
acpi_ut_trace+0x44/0x180 drivers/acpi/acpica/utdebug.c:268
acpi_ns_search_parent_tree drivers/acpi/acpica/nssearch.c:171 [inline]
acpi_ns_search_and_enter+0x15c/0x860 drivers/acpi/acpica/nssearch.c:354
acpi_ns_lookup+0xbd8/0x1070 drivers/acpi/acpica/nsaccess.c:589
acpi_ps_get_next_namepath+0xc1/0x620 drivers/acpi/acpica/psargs.c:263
acpi_ps_get_arguments drivers/acpi/acpica/psloop.c:79 [inline]
acpi_ps_parse_loop+0x605/0x1520 drivers/acpi/acpica/psloop.c:408
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: 0x0000000e -> 0x00000011
Reported by Kernel Concurrency Sanitizer on:
CPU: 0 UID: 0 PID: 3648 Comm: syz-executor109 Not tainted syzkaller #0 PREEMPT(lazy)
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/16/2026
==================================================================
==================================================================
BUG: KCSAN: data-race in acpi_ut_acquire_mutex / acpi_ut_release_mutex
write to 0xffffffff89626ac8 of 8 bytes by task 3642 on cpu 1:
acpi_ut_release_mutex+0x209/0x240 drivers/acpi/acpica/utmutex.c:326
acpi_get_name+0xd7/0xf0 drivers/acpi/acpica/nsxfname.c:163
acpi_object_path drivers/acpi/device_sysfs.c:26 [inline]
path_show+0x5d/0xe0 drivers/acpi/device_sysfs.c:459
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 0xffffffff89626ac8 of 8 bytes by task 3648 on cpu 0:
acpi_ut_acquire_mutex+0x54/0x4a0 drivers/acpi/acpica/utmutex.c:212
acpi_get_name+0x62/0xf0 drivers/acpi/acpica/nsxfname.c:143
acpi_object_path drivers/acpi/device_sysfs.c:26 [inline]
path_show+0x5d/0xe0 drivers/acpi/device_sysfs.c:459
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: 0xffff8881003dd640 -> 0x0000000000000000
Reported by Kernel Concurrency Sanitizer on:
CPU: 0 UID: 0 PID: 3648 Comm: syz-executor109 Not tainted syzkaller #0 PREEMPT(lazy)
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/16/2026
==================================================================
==================================================================
BUG: KCSAN: data-race in acpi_ut_exit / acpi_ut_track_stack_ptr
write to 0xffffffff896268c8 of 4 bytes by task 3642 on cpu 1:
acpi_ut_exit+0xd5/0xf0 drivers/acpi/acpica/utdebug.c:423
acpi_ex_enter_interpreter+0xbb/0xd0 drivers/acpi/acpica/exutils.c:67
acpi_evaluate_object+0x661/0x800 drivers/acpi/acpica/nsxfeval.c:427
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 0xffffffff896268c8 of 4 bytes by task 3648 on cpu 0:
acpi_ut_track_stack_ptr+0x5f/0xd0 drivers/acpi/acpica/utdebug.c:73
acpi_ut_get_object_size+0x2f/0x1d0 drivers/acpi/acpica/utobject.c:669
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: 0x00000008 -> 0x00000006
Reported by Kernel Concurrency Sanitizer on:
CPU: 0 UID: 0 PID: 3648 Comm: syz-executor109 Not tainted syzkaller #0 PREEMPT(lazy)
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/16/2026
==================================================================
==================================================================
BUG: KCSAN: data-race in acpi_ut_exit / acpi_ut_exit
read to 0xffffffff896268c8 of 4 bytes by task 3643 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
write to 0xffffffff896268c8 of 4 bytes by task 3648 on cpu 1:
acpi_ut_exit+0xd5/0xf0 drivers/acpi/acpica/utdebug.c:423
acpi_ex_exit_interpreter+0xbb/0xd0 drivers/acpi/acpica/exutils.c:109
acpi_ns_evaluate+0x8b5/0xac0 drivers/acpi/acpica/nseval.c:206
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: 0x00000010 -> 0x0000000e
Reported by Kernel Concurrency Sanitizer on:
CPU: 1 UID: 0 PID: 3648 Comm: syz-executor109 Not tainted syzkaller #0 PREEMPT(lazy)
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/16/2026
==================================================================
==================================================================
BUG: KCSAN: data-race in acpi_ut_trace / acpi_ut_trace_ptr
read-write to 0xffffffff896268c8 of 4 bytes by task 3647 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-write to 0xffffffff896268c8 of 4 bytes by task 3648 on cpu 1:
acpi_ut_trace_ptr+0x49/0x180 drivers/acpi/acpica/utdebug.c:306
acpi_ns_build_normalized_path+0x43/0x420 drivers/acpi/acpica/nsnames.c:202
acpi_ns_get_normalized_pathname+0x44/0x1b0 drivers/acpi/acpica/nsnames.c:305
acpi_ex_start_trace_method+0x2c/0x270 drivers/acpi/acpica/extrace.c:227
acpi_ds_begin_method_execution+0x50/0x6a0 drivers/acpi/acpica/dsmethod.c:304
acpi_ds_call_control_method+0x264/0x620 drivers/acpi/acpica/dsmethod.c:502
acpi_ps_parse_aml+0x4c3/0xa10 drivers/acpi/acpica/psparse.c:517
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: 0x0000001e -> 0x00000021
Reported by Kernel Concurrency Sanitizer on:
CPU: 1 UID: 0 PID: 3648 Comm: syz-executor109 Not tainted syzkaller #0 PREEMPT(lazy)
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/16/2026
==================================================================
==================================================================
BUG: KCSAN: data-race in acpi_ut_ptr_exit / acpi_ut_trace
read-write to 0xffffffff896268c8 of 4 bytes by task 3647 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 0xffffffff896268c8 of 4 bytes by task 3648 on cpu 1:
acpi_ut_ptr_exit+0xdd/0x100 drivers/acpi/acpica/utdebug.c:549
acpi_ut_create_internal_object_dbg drivers/acpi/acpica/utobject.c:115 [inline]
acpi_ut_create_integer_object+0xb0/0x130 drivers/acpi/acpica/utobject.c:180
acpi_ps_execute_method+0x3f5/0x660 drivers/acpi/acpica/psxface.c:180
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: 0x0000000e -> 0x00000011
Reported by Kernel Concurrency Sanitizer on:
CPU: 1 UID: 0 PID: 3648 Comm: syz-executor109 Not tainted syzkaller #0 PREEMPT(lazy)
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/16/2026
==================================================================
==================================================================
BUG: KCSAN: data-race in acpi_ut_acquire_mutex / acpi_ut_acquire_mutex
write to 0xffffffff89626ac8 of 8 bytes by task 3645 on cpu 0:
acpi_ut_acquire_mutex+0x378/0x4a0 drivers/acpi/acpica/utmutex.c:250
acpi_ex_enter_interpreter+0x6b/0xd0 drivers/acpi/acpica/exutils.c:62
acpi_ns_evaluate+0x8a6/0xac0 drivers/acpi/acpica/nseval.c:204
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 to 0xffffffff89626ac8 of 8 bytes by task 3648 on cpu 1:
acpi_ut_acquire_mutex+0x167/0x4a0 drivers/acpi/acpica/utmutex.c:212
acpi_ex_enter_interpreter+0x2e/0xd0 drivers/acpi/acpica/exutils.c:57
acpi_ns_evaluate+0x8a6/0xac0 drivers/acpi/acpica/nseval.c:204
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: 0x0000000000000000 -> 0xffff8881003da280
Reported by Kernel Concurrency Sanitizer on:
CPU: 1 UID: 0 PID: 3648 Comm: syz-executor109 Not tainted syzkaller #0 PREEMPT(lazy)
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/16/2026
==================================================================
==================================================================
BUG: KCSAN: data-race in acpi_ut_trace_ptr / acpi_ut_track_stack_ptr
read-write to 0xffffffff896268c8 of 4 bytes by task 3644 on cpu 0:
acpi_ut_trace_ptr+0x49/0x180 drivers/acpi/acpica/utdebug.c:306
acpi_ns_get_normalized_pathname+0x36/0x1b0 drivers/acpi/acpica/nsnames.c:301
acpi_ns_evaluate+0x24e/0xac0 drivers/acpi/acpica/nseval.c:96
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 to 0xffffffff896268c8 of 4 bytes by task 3648 on cpu 1:
acpi_ut_track_stack_ptr+0x5f/0xd0 drivers/acpi/acpica/utdebug.c:73
acpi_ps_init_op+0x17/0xa0 drivers/acpi/acpica/psutils.c:58
acpi_ps_alloc_op+0xdb/0x170 drivers/acpi/acpica/psutils.c:121
acpi_ps_create_op+0x289/0x6b0 drivers/acpi/acpica/psobject.c:321
acpi_ps_parse_loop+0x4e1/0x1520 drivers/acpi/acpica/psloop.c:306
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: 0x00000013 -> 0x00000014
Reported by Kernel Concurrency Sanitizer on:
CPU: 1 UID: 0 PID: 3648 Comm: syz-executor109 Not tainted syzkaller #0 PREEMPT(lazy)
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/16/2026
==================================================================
==================================================================
BUG: KCSAN: data-race in acpi_ut_trace / acpi_ut_value_exit
read-write to 0xffffffff896268c8 of 4 bytes by task 3642 on cpu 1:
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 0xffffffff896268c8 of 4 bytes by task 3648 on cpu 0:
acpi_ut_value_exit+0xbf/0x110 drivers/acpi/acpica/utdebug.c:510
acpi_ns_get_type+0x9d/0xb0 drivers/acpi/acpica/nsutils.c:-1
acpi_ns_evaluate+0x5f/0xac0 drivers/acpi/acpica/nseval.c:73
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: 0x00000008 -> 0x0000000b
Reported by Kernel Concurrency Sanitizer on:
CPU: 0 UID: 0 PID: 3648 Comm: syz-executor109 Not tainted syzkaller #0 PREEMPT(lazy)
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/16/2026
==================================================================
Struck through repros no longer work on HEAD.