KCSAN: data-race in acpi_ut_status_exit / acpi_ut_trace_ptr

Status: moderation: reported on 2026/08/02 08:38
Subsystems: acpica
Labels: race:benign prio:low
[Documentation on labels]
Reported-by: syzbot+926bdb029425bbfc1288@syzkaller.appspotmail.com
First crash: 94d, last: 3d03h
▶ ▼ ✨ AI Jobs (3)
ID Workflow Result Correct Bug Created Started Finished Revision
86f29916 repro-c Reproduced: ✅ ❓ KCSAN: data-race in acpi_ut_status_exit / acpi_ut_trace_ptr 2026/10/02 16:24 2026/10/02 16:25 2026/10/02 17:06 57bbd979
c9ad6d9f assessment-security DenialOfService: ❌ Exploitable: ❌ FilesystemTrigger: ❌ NetworkTrigger: ❌ PeripheralTrigger: ❌ RemoteTrigger: ❌ Unprivileged: ❌ UserNamespace: ❌ VMGuestTrigger: ❌ VMHostTrigger: ❌ ❓ KCSAN: data-race in acpi_ut_status_exit / acpi_ut_trace_ptr 2026/08/04 00:27 2026/08/04 00:27 2026/08/04 00:53 cb1adeae
41b2619a assessment-kcsan Benign: ✅ ❓ KCSAN: data-race in acpi_ut_status_exit / acpi_ut_trace_ptr 2026/08/02 08:38 2026/08/02 08:38 2026/08/02 09:05 e611ffe1
▶ ▼ Last patch testing requests (1)
Created Duration User Patch Repo Result
2026/10/02 19:59 9m retest repro git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git 5e0f8396d4805a3e7f753fa58c8c55f1f3cc2160 report job log log

Sample crash report:
bridge0: port 1(bridge_slave_0) entered disabled state
bond0 (unregistering): (slave bond_slave_0): Releasing backup interface
bond0 (unregistering): (slave bond_slave_1): Releasing backup interface
bond0 (unregistering): Released all slaves
tipc: Left network mode
hsr_slave_0: left promiscuous mode
hsr_slave_1: left promiscuous mode
batman_adv: batadv0: Removing interface: batadv_slave_0
batman_adv: batadv0: Removing interface: batadv_slave_1
team0 (unregistering): Port device team_slave_1 removed
team0 (unregistering): Port device team_slave_0 removed
==================================================================
BUG: KCSAN: data-race in acpi_ut_status_exit / acpi_ut_trace_ptr

read-write to 0xffffffff89665af8 of 4 bytes by task 3668 on cpu 1:
 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:705
 acpi_pci_set_power_state+0x56/0x180 drivers/pci/pci-acpi.c:1081
 platform_pci_set_power_state drivers/pci/pci.c:1091 [inline]
 pci_power_up+0x40/0x3b0 drivers/pci/pci.c:1346
 pci_pm_power_up_and_verify_state+0x29/0x130 drivers/pci/pci.c:3211
 pci_pm_default_resume_early drivers/pci/pci-driver.c:614 [inline]
 pci_pm_resume_noirq+0xcb/0x320 drivers/pci/pci-driver.c:1040
 dpm_run_callback+0x53/0x2f0 drivers/base/power/main.c:513
 device_resume_noirq+0x851/0x880 drivers/base/power/main.c:873
 async_resume_noirq+0x2c/0x40 drivers/base/power/main.c:896
 async_run_entry_fn+0x52/0x180 kernel/async.c:129
 process_one_work kernel/workqueue.c:3495 [inline]
 process_scheduled_works+0x53f/0xa20 kernel/workqueue.c:3578
 worker_thread+0x56c/0x770 kernel/workqueue.c:3659
 kthread+0x223/0x270 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 to 0xffffffff89665af8 of 4 bytes by task 5609 on cpu 0:
 acpi_ut_status_exit+0xd8/0x120 drivers/acpi/acpica/utdebug.c:471
 acpi_ns_build_internal_name+0x5af/0x5d0 drivers/acpi/acpica/nsutils.c:-1
 acpi_ns_internalize_name+0x265/0x310 drivers/acpi/acpica/nsutils.c:339
 acpi_ns_get_node_unlocked+0xed/0x2d0 drivers/acpi/acpica/nsutils.c:666
 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:705
 acpi_pci_set_power_state+0x56/0x180 drivers/pci/pci-acpi.c:1081
 platform_pci_set_power_state drivers/pci/pci.c:1091 [inline]
 pci_power_up+0x40/0x3b0 drivers/pci/pci.c:1346
 pci_pm_power_up_and_verify_state+0x29/0x130 drivers/pci/pci.c:3211
 pci_pm_default_resume_early drivers/pci/pci-driver.c:614 [inline]
 pci_pm_resume_noirq+0xcb/0x320 drivers/pci/pci-driver.c:1040
 dpm_run_callback+0x53/0x2f0 drivers/base/power/main.c:513
 device_resume_noirq+0x851/0x880 drivers/base/power/main.c:873
 async_resume_noirq+0x2c/0x40 drivers/base/power/main.c:896
 async_run_entry_fn+0x52/0x180 kernel/async.c:129
 process_one_work kernel/workqueue.c:3495 [inline]
 process_scheduled_works+0x53f/0xa20 kernel/workqueue.c:3578
 worker_thread+0x56c/0x770 kernel/workqueue.c:3659
 kthread+0x223/0x270 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: 0x00000004 -> 0x00000007

Reported by Kernel Concurrency Sanitizer on:
CPU: 0 UID: 0 PID: 5609 Comm: kworker/u8:121 Not tainted syzkaller #0 PREEMPT(lazy) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/07/2026
Workqueue: async async_run_entry_fn
==================================================================

Crashes (11):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2026/11/01 07:24 upstream e9954f3fbddd 25a0ae84 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in acpi_ut_status_exit / acpi_ut_trace_ptr
2026/09/17 19:51 upstream 4982d3552a3b 8d7d05f1 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in acpi_ut_status_exit / acpi_ut_trace_ptr
2026/09/15 06:32 upstream 587858367581 81a27d1a .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in acpi_ut_status_exit / acpi_ut_trace_ptr
2026/09/12 10:19 upstream 3026c6e4f223 70a60e12 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in acpi_ut_status_exit / acpi_ut_trace_ptr
2026/09/09 13:34 upstream 893e11787f78 8387c273 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in acpi_ut_status_exit / acpi_ut_trace_ptr
2026/09/01 05:44 upstream bf1079577a11 316d9396 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in acpi_ut_status_exit / acpi_ut_trace_ptr
2026/08/31 04:36 upstream a23cbb05744b 2f52988a .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in acpi_ut_status_exit / acpi_ut_trace_ptr
2026/08/28 02:14 upstream 1b78070aaef6 69a01293 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in acpi_ut_status_exit / acpi_ut_trace_ptr
2026/08/27 15:43 upstream 73e3f0710014 69a01293 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in acpi_ut_status_exit / acpi_ut_trace_ptr
2026/08/06 02:40 upstream 0d8395707651 cd5b1963 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in acpi_ut_status_exit / acpi_ut_trace_ptr
2026/08/02 08:38 upstream 2d2338c93da7 e611ffe1 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in acpi_ut_status_exit / acpi_ut_trace_ptr
* Struck through repros no longer work on HEAD.