[moderation] [acpica?] KCSAN: data-race in acpi_ut_trace / acpi_ut_track_stack_ptr

[syzbot]

Hello,

syzbot found the following issue on:

HEAD commit: e2a936998ab2 Merge tag 'drm-fixes-2026-07-25' of https://g..
git tree: upstream
console output: https://syzkaller.appspot.com/x/log.txt?x=1454109e580000
kernel config: https://syzkaller.appspot.com/x/.config?x=84b3039e8461eef5
dashboard link: https://syzkaller.appspot.com/bug?extid=b60b9dcd3441fc7ac4e2
compiler: Debian clang version 22.1.8 (++20260613092233+e80beda6e255-1~exp1~20260613092250.77), Debian LLD 22.1.8
CC: [acpica...@lists.linux.dev le...@kernel.org linux...@vger.kernel.org linux-...@vger.kernel.org raf...@kernel.org robert...@intel.com saket....@intel.com]

Unfortunately, I don't have any reproducer for this issue yet.

Downloadable assets:
disk image: https://storage.googleapis.com/syzbot-assets/18e4408ad25d/disk-e2a93699.raw.xz
vmlinux: https://storage.googleapis.com/syzbot-assets/869cf07c3dad/vmlinux-e2a93699.xz
kernel image: https://storage.googleapis.com/syzbot-assets/5af11d8058c4/bzImage-e2a93699.xz

IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+b60b9d...@syzkaller.appspotmail.com

==================================================================
BUG: KCSAN: data-race in acpi_ut_trace / acpi_ut_track_stack_ptr

read to 0xffffffff89404508 of 4 bytes by task 14486 on cpu 1:
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:1068 [inline]
pci_power_up+0x40/0x3b0 drivers/pci/pci.c:1306
pci_pm_power_up_and_verify_state+0x29/0x130 drivers/pci/pci.c:3153
pci_pm_default_resume_early drivers/pci/pci-driver.c:591 [inline]
pci_pm_resume_noirq+0xcb/0x320 drivers/pci/pci-driver.c:996
dpm_run_callback+0x53/0x2f0 drivers/base/power/main.c:510
device_resume_noirq+0x851/0x880 drivers/base/power/main.c:857
async_resume_noirq+0x2c/0x40 drivers/base/power/main.c:879
async_run_entry_fn+0x52/0x180 kernel/async.c:129
process_one_work kernel/workqueue.c:3322 [inline]
process_scheduled_works+0x4d4/0x9a0 kernel/workqueue.c:3405
worker_thread+0x569/0x750 kernel/workqueue.c:3486
kthread+0x221/0x270 kernel/kthread.c:436
ret_from_fork+0x146/0x330 arch/x86/kernel/process.c:158
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245

read-write to 0xffffffff89404508 of 4 bytes by task 14491 on cpu 0:
acpi_ut_trace+0x44/0x180 drivers/acpi/acpica/utdebug.c:268
acpi_ns_search_and_enter+0x69/0x860 drivers/acpi/acpica/nssearch.c:261
acpi_ns_lookup+0xbd8/0x1070 drivers/acpi/acpica/nsaccess.c:589
acpi_ns_get_node_unlocked+0x143/0x2d0 drivers/acpi/acpica/nsutils.c:677
acpi_ns_get_node+0x76/0xc0 drivers/acpi/acpica/nsutils.c:726
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:1068 [inline]
pci_power_up+0x40/0x3b0 drivers/pci/pci.c:1306
pci_pm_power_up_and_verify_state+0x29/0x130 drivers/pci/pci.c:3153
pci_pm_default_resume_early drivers/pci/pci-driver.c:591 [inline]
pci_pm_resume_noirq+0xcb/0x320 drivers/pci/pci-driver.c:996
dpm_run_callback+0x53/0x2f0 drivers/base/power/main.c:510
device_resume_noirq+0x851/0x880 drivers/base/power/main.c:857
async_resume_noirq+0x2c/0x40 drivers/base/power/main.c:879
async_run_entry_fn+0x52/0x180 kernel/async.c:129
process_one_work kernel/workqueue.c:3322 [inline]
process_scheduled_works+0x4d4/0x9a0 kernel/workqueue.c:3405
worker_thread+0x569/0x750 kernel/workqueue.c:3486
kthread+0x221/0x270 kernel/kthread.c:436
ret_from_fork+0x146/0x330 arch/x86/kernel/process.c:158
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245

value changed: 0x00000003 -> 0x00000004

Reported by Kernel Concurrency Sanitizer on:
CPU: 0 UID: 0 PID: 14491 Comm: kworker/u8:13 Tainted: G W syzkaller #0 PREEMPT(lazy)
Tainted: [W]=WARN
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/16/2026
Workqueue: async async_run_entry_fn
==================================================================


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