syzbot
inconsistent lock state in fs_reclaim_acquire (4)
Status:
upstream: reported C repro on 2026/09/09 22:45
Subsystems:
mm
cgroups
Labels:
prio:high
[Documentation on labels]
Reported-by: syzbot+093e05755c2d99caab91@syzkaller.appspotmail.com
First crash: 27d, last: 1d00h
Sample crash report:
================================
WARNING: inconsistent lock state
syzkaller #0 Not tainted
--------------------------------
inconsistent {SOFTIRQ-ON-W} -> {IN-SOFTIRQ-W} usage.
swapper/1/0 [HC0[0]:SC1[1]:HE0:SE0] takes:
ffffffff8ee900e0 (fs_reclaim){+.?.}-{0:0}, at: might_alloc include/linux/sched/mm.h:316 [inline]
ffffffff8ee900e0 (fs_reclaim){+.?.}-{0:0}, at: slab_pre_alloc_hook mm/slub.c:4636 [inline]
ffffffff8ee900e0 (fs_reclaim){+.?.}-{0:0}, at: slab_alloc_node mm/slub.c:4974 [inline]
ffffffff8ee900e0 (fs_reclaim){+.?.}-{0:0}, at: __do_kmalloc_node mm/slub.c:5413 [inline]
ffffffff8ee900e0 (fs_reclaim){+.?.}-{0:0}, at: __kmalloc_node_track_caller_noprof+0xb9/0x720 mm/slub.c:5545
{SOFTIRQ-ON-W} state was registered at:
lock_acquire+0x115/0x350 kernel/locking/lockdep.c:5942
__fs_reclaim_acquire mm/page_alloc.c:4375 [inline]
fs_reclaim_acquire+0x71/0x100 mm/page_alloc.c:4389
might_alloc include/linux/sched/mm.h:316 [inline]
xa_alloc include/linux/xarray.h:876 [inline]
mem_cgroup_alloc mm/memcontrol.c:4160 [inline]
mem_cgroup_css_alloc+0xa2/0x1970 mm/memcontrol.c:4225
cgroup_init_subsys+0x114/0x630 kernel/cgroup/cgroup.c:6431
cgroup_init+0x729/0xbf0 kernel/cgroup/cgroup.c:6558
start_kernel+0x379/0x3e0 init/main.c:1176
x86_64_start_reservations+0x24/0x30 arch/x86/kernel/head64.c:310
x86_64_start_kernel+0x137/0x1b0 arch/x86/kernel/head64.c:291
common_startup_64+0x13e/0x157
irq event stamp: 323357
hardirqs last enabled at (323356): [<ffffffff8be7aee0>] __raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:210 [inline]
hardirqs last enabled at (323356): [<ffffffff8be7aee0>] _raw_spin_unlock_irqrestore+0x30/0x80 kernel/locking/spinlock.c:221
hardirqs last disabled at (323357): [<ffffffff8be7ac9a>] __raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:153 [inline]
hardirqs last disabled at (323357): [<ffffffff8be7ac9a>] _raw_spin_lock_irqsave+0x1a/0x60 kernel/locking/spinlock.c:181
softirqs last enabled at (323340): [<ffffffff8188fb2b>] __do_softirq kernel/softirq.c:679 [inline]
softirqs last enabled at (323340): [<ffffffff8188fb2b>] invoke_softirq kernel/softirq.c:519 [inline]
softirqs last enabled at (323340): [<ffffffff8188fb2b>] __irq_exit_rcu+0xcb/0x220 kernel/softirq.c:758
softirqs last disabled at (323353): [<ffffffff8188fb2b>] __do_softirq kernel/softirq.c:679 [inline]
softirqs last disabled at (323353): [<ffffffff8188fb2b>] invoke_softirq kernel/softirq.c:519 [inline]
softirqs last disabled at (323353): [<ffffffff8188fb2b>] __irq_exit_rcu+0xcb/0x220 kernel/softirq.c:758
other info that might help us debug this:
Possible unsafe locking scenario:
CPU0
----
lock(fs_reclaim);
<Interrupt>
lock(fs_reclaim);
*** DEADLOCK ***
locks held by swapper/1/0: 0, last CPU#1
stack backtrace:
CPU: 1 UID: 0 PID: 0 Comm: swapper/1 Not tainted syzkaller #0 PREEMPT(full)
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/24/2026
Call Trace:
<IRQ>
dump_stack_lvl+0xe8/0x150 lib/dump_stack.c:120
print_usage_bug+0x28c/0x2e0 kernel/locking/lockdep.c:4086
valid_state+0xbe/0xf0 kernel/locking/lockdep.c:4100
mark_lock_irq+0x36/0x380 kernel/locking/lockdep.c:4311
mark_lock+0x117/0x190 kernel/locking/lockdep.c:4797
mark_usage kernel/locking/lockdep.c:-1 [inline]
__lock_acquire+0x71e/0x2de0 kernel/locking/lockdep.c:5242
lock_acquire+0x115/0x350 kernel/locking/lockdep.c:5942
__fs_reclaim_acquire mm/page_alloc.c:4375 [inline]
fs_reclaim_acquire+0x71/0x100 mm/page_alloc.c:4389
might_alloc include/linux/sched/mm.h:316 [inline]
slab_pre_alloc_hook mm/slub.c:4636 [inline]
slab_alloc_node mm/slub.c:4974 [inline]
__do_kmalloc_node mm/slub.c:5413 [inline]
__kmalloc_node_track_caller_noprof+0xb9/0x720 mm/slub.c:5545
alloc_dr drivers/base/devres.c:141 [inline]
devm_kmalloc+0x7f/0x340 drivers/base/devres.c:951
devm_kzalloc include/linux/device/devres.h:50 [inline]
mt_allocate_report_data drivers/hid/hid-multitouch.c:695 [inline]
mt_find_report_data+0xd1/0xc60 drivers/hid/hid-multitouch.c:745
mt_event+0x71/0x180 drivers/hid/hid-multitouch.c:1570
hid_process_event+0x436/0x620 drivers/hid/hid-core.c:1572
hid_process_report drivers/hid/hid-core.c:1730 [inline]
hid_report_raw_event+0xf6a/0x1900 drivers/hid/hid-core.c:2109
__hid_input_report+0x454/0x580 drivers/hid/hid-core.c:2180
hid_ctrl+0x204/0x580 drivers/hid/usbhid/hid-core.c:486
__usb_hcd_giveback_urb+0x378/0x540 drivers/usb/core/hcd.c:1657
dummy_timer+0xa91/0x4cf0 drivers/usb/gadget/udc/dummy_hcd.c:2019
__run_hrtimer kernel/time/hrtimer.c:2067 [inline]
__hrtimer_run_queues+0x3bc/0xa10 kernel/time/hrtimer.c:2124
hrtimer_run_softirq+0x1e3/0x2e0 kernel/time/hrtimer.c:2141
handle_softirqs+0x226/0x860 kernel/softirq.c:645
__do_softirq kernel/softirq.c:679 [inline]
invoke_softirq kernel/softirq.c:519 [inline]
__irq_exit_rcu+0xcb/0x220 kernel/softirq.c:758
irq_exit_rcu+0x9/0x30 kernel/softirq.c:775
instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1062 [inline]
sysvec_apic_timer_interrupt+0xa6/0xc0 arch/x86/kernel/apic/apic.c:1062
</IRQ>
<TASK>
asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:674
RIP: 0010:pv_native_safe_halt+0xf/0x20 arch/x86/kernel/paravirt.c:64
Code: 9c 8f 02 c3 cc cc cc cc cc cc cc 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 f3 0f 1e fa 66 90 0f 00 2d 33 91 24 00 fb f4 <e9> 8c 08 03 00 cc cc cc cc cc cc cc cc cc cc cc cc 90 90 90 90 90
RSP: 0018:ffffc900001a7e40 EFLAGS: 00000246
RAX: 000000000004ef17 RBX: ffffffff819baed0 RCX: 8000000000000001
RDX: 0000000000000001 RSI: ffffffff8e475f59 RDI: ffffffff8c6d9a80
RBP: ffffc900001a7f10 R08: ffff8880b8733a1b R09: 1ffff110170e6743
R10: dffffc0000000000 R11: ffffed10170e6744 R12: 0000000000000000
R13: 1ffff11003cd2bb8 R14: 1ffff92000034fd0 R15: dffffc0000000000
arch_safe_halt arch/x86/kernel/process.c:767 [inline]
default_idle+0x9/0x20 arch/x86/kernel/process.c:768
default_idle_call+0x72/0xb0 kernel/sched/idle.c:122
cpuidle_idle_call kernel/sched/idle.c:199 [inline]
do_idle+0x2e0/0x540 kernel/sched/idle.c:355
cpu_startup_entry+0x43/0x60 kernel/sched/idle.c:454
start_secondary+0x101/0x110 arch/x86/kernel/smpboot.c:312
common_startup_64+0x13e/0x157
</TASK>
BUG: sleeping function called from invalid context at ./include/linux/sched/mm.h:322
in_atomic(): 1, irqs_disabled(): 1, non_block: 0, pid: 0, name: swapper/1
preempt_count: 101, expected: 0
RCU nest depth: 0, expected: 0
INFO: lockdep is turned off.
irq event stamp: 323357
hardirqs last enabled at (323356): [<ffffffff8be7aee0>] __raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:210 [inline]
hardirqs last enabled at (323356): [<ffffffff8be7aee0>] _raw_spin_unlock_irqrestore+0x30/0x80 kernel/locking/spinlock.c:221
hardirqs last disabled at (323357): [<ffffffff8be7ac9a>] __raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:153 [inline]
hardirqs last disabled at (323357): [<ffffffff8be7ac9a>] _raw_spin_lock_irqsave+0x1a/0x60 kernel/locking/spinlock.c:181
softirqs last enabled at (323340): [<ffffffff8188fb2b>] __do_softirq kernel/softirq.c:679 [inline]
softirqs last enabled at (323340): [<ffffffff8188fb2b>] invoke_softirq kernel/softirq.c:519 [inline]
softirqs last enabled at (323340): [<ffffffff8188fb2b>] __irq_exit_rcu+0xcb/0x220 kernel/softirq.c:758
softirqs last disabled at (323353): [<ffffffff8188fb2b>] __do_softirq kernel/softirq.c:679 [inline]
softirqs last disabled at (323353): [<ffffffff8188fb2b>] invoke_softirq kernel/softirq.c:519 [inline]
softirqs last disabled at (323353): [<ffffffff8188fb2b>] __irq_exit_rcu+0xcb/0x220 kernel/softirq.c:758
Preemption disabled at:
[<0000000000000000>] 0x0
CPU: 1 UID: 0 PID: 0 Comm: swapper/1 Not tainted syzkaller #0 PREEMPT(full)
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/24/2026
Call Trace:
<IRQ>
dump_stack_lvl+0xe8/0x150 lib/dump_stack.c:120
__might_resched+0x36a/0x4c0 kernel/sched/core.c:9256
might_alloc include/linux/sched/mm.h:322 [inline]
slab_pre_alloc_hook mm/slub.c:4636 [inline]
slab_alloc_node mm/slub.c:4974 [inline]
__do_kmalloc_node mm/slub.c:5413 [inline]
__kmalloc_node_track_caller_noprof+0xec/0x720 mm/slub.c:5545
alloc_dr drivers/base/devres.c:141 [inline]
devm_kmalloc+0x7f/0x340 drivers/base/devres.c:951
devm_kzalloc include/linux/device/devres.h:50 [inline]
mt_allocate_report_data drivers/hid/hid-multitouch.c:695 [inline]
mt_find_report_data+0xd1/0xc60 drivers/hid/hid-multitouch.c:745
mt_event+0x71/0x180 drivers/hid/hid-multitouch.c:1570
hid_process_event+0x436/0x620 drivers/hid/hid-core.c:1572
hid_process_report drivers/hid/hid-core.c:1730 [inline]
hid_report_raw_event+0xf6a/0x1900 drivers/hid/hid-core.c:2109
__hid_input_report+0x454/0x580 drivers/hid/hid-core.c:2180
hid_ctrl+0x204/0x580 drivers/hid/usbhid/hid-core.c:486
__usb_hcd_giveback_urb+0x378/0x540 drivers/usb/core/hcd.c:1657
dummy_timer+0xa91/0x4cf0 drivers/usb/gadget/udc/dummy_hcd.c:2019
__run_hrtimer kernel/time/hrtimer.c:2067 [inline]
__hrtimer_run_queues+0x3bc/0xa10 kernel/time/hrtimer.c:2124
hrtimer_run_softirq+0x1e3/0x2e0 kernel/time/hrtimer.c:2141
handle_softirqs+0x226/0x860 kernel/softirq.c:645
__do_softirq kernel/softirq.c:679 [inline]
invoke_softirq kernel/softirq.c:519 [inline]
__irq_exit_rcu+0xcb/0x220 kernel/softirq.c:758
irq_exit_rcu+0x9/0x30 kernel/softirq.c:775
instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1062 [inline]
sysvec_apic_timer_interrupt+0xa6/0xc0 arch/x86/kernel/apic/apic.c:1062
</IRQ>
<TASK>
asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:674
RIP: 0010:pv_native_safe_halt+0xf/0x20 arch/x86/kernel/paravirt.c:64
Code: 9c 8f 02 c3 cc cc cc cc cc cc cc 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 f3 0f 1e fa 66 90 0f 00 2d 33 91 24 00 fb f4 <e9> 8c 08 03 00 cc cc cc cc cc cc cc cc cc cc cc cc 90 90 90 90 90
RSP: 0018:ffffc900001a7e40 EFLAGS: 00000246
RAX: 000000000004ef17 RBX: ffffffff819baed0 RCX: 8000000000000001
RDX: 0000000000000001 RSI: ffffffff8e475f59 RDI: ffffffff8c6d9a80
RBP: ffffc900001a7f10 R08: ffff8880b8733a1b R09: 1ffff110170e6743
R10: dffffc0000000000 R11: ffffed10170e6744 R12: 0000000000000000
R13: 1ffff11003cd2bb8 R14: 1ffff92000034fd0 R15: dffffc0000000000
arch_safe_halt arch/x86/kernel/process.c:767 [inline]
default_idle+0x9/0x20 arch/x86/kernel/process.c:768
default_idle_call+0x72/0xb0 kernel/sched/idle.c:122
cpuidle_idle_call kernel/sched/idle.c:199 [inline]
do_idle+0x2e0/0x540 kernel/sched/idle.c:355
cpu_startup_entry+0x43/0x60 kernel/sched/idle.c:454
start_secondary+0x101/0x110 arch/x86/kernel/smpboot.c:312
common_startup_64+0x13e/0x157
</TASK>
BUG: sleeping function called from invalid context at ./include/linux/sched/mm.h:322
in_atomic(): 1, irqs_disabled(): 1, non_block: 0, pid: 0, name: swapper/1
preempt_count: 101, expected: 0
RCU nest depth: 0, expected: 0
INFO: lockdep is turned off.
irq event stamp: 323357
hardirqs last enabled at (323356): [<ffffffff8be7aee0>] __raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:210 [inline]
hardirqs last enabled at (323356): [<ffffffff8be7aee0>] _raw_spin_unlock_irqrestore+0x30/0x80 kernel/locking/spinlock.c:221
hardirqs last disabled at (323357): [<ffffffff8be7ac9a>] __raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:153 [inline]
hardirqs last disabled at (323357): [<ffffffff8be7ac9a>] _raw_spin_lock_irqsave+0x1a/0x60 kernel/locking/spinlock.c:181
softirqs last enabled at (323340): [<ffffffff8188fb2b>] __do_softirq kernel/softirq.c:679 [inline]
softirqs last enabled at (323340): [<ffffffff8188fb2b>] invoke_softirq kernel/softirq.c:519 [inline]
softirqs last enabled at (323340): [<ffffffff8188fb2b>] __irq_exit_rcu+0xcb/0x220 kernel/softirq.c:758
softirqs last disabled at (323353): [<ffffffff8188fb2b>] __do_softirq kernel/softirq.c:679 [inline]
softirqs last disabled at (323353): [<ffffffff8188fb2b>] invoke_softirq kernel/softirq.c:519 [inline]
softirqs last disabled at (323353): [<ffffffff8188fb2b>] __irq_exit_rcu+0xcb/0x220 kernel/softirq.c:758
Preemption disabled at:
[<0000000000000000>] 0x0
CPU: 1 UID: 0 PID: 0 Comm: swapper/1 Tainted: G W syzkaller #0 PREEMPT(full)
Tainted: [W]=WARN
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/24/2026
Call Trace:
<IRQ>
dump_stack_lvl+0xe8/0x150 lib/dump_stack.c:120
__might_resched+0x36a/0x4c0 kernel/sched/core.c:9256
might_alloc include/linux/sched/mm.h:322 [inline]
slab_pre_alloc_hook mm/slub.c:4636 [inline]
slab_alloc_node mm/slub.c:4974 [inline]
__do_kmalloc_node mm/slub.c:5413 [inline]
__kmalloc_node_track_caller_noprof+0xec/0x720 mm/slub.c:5545
alloc_dr drivers/base/devres.c:141 [inline]
devm_kmalloc+0x7f/0x340 drivers/base/devres.c:951
devm_kzalloc include/linux/device/devres.h:50 [inline]
mt_allocate_report_data drivers/hid/hid-multitouch.c:695 [inline]
mt_find_report_data+0xd1/0xc60 drivers/hid/hid-multitouch.c:745
mt_event+0x71/0x180 drivers/hid/hid-multitouch.c:1570
hid_process_event+0x436/0x620 drivers/hid/hid-core.c:1572
hid_process_report drivers/hid/hid-core.c:1730 [inline]
hid_report_raw_event+0xf6a/0x1900 drivers/hid/hid-core.c:2109
__hid_input_report+0x454/0x580 drivers/hid/hid-core.c:2180
hid_ctrl+0x204/0x580 drivers/hid/usbhid/hid-core.c:486
__usb_hcd_giveback_urb+0x378/0x540 drivers/usb/core/hcd.c:1657
dummy_timer+0xa91/0x4cf0 drivers/usb/gadget/udc/dummy_hcd.c:2019
__run_hrtimer kernel/time/hrtimer.c:2067 [inline]
__hrtimer_run_queues+0x3bc/0xa10 kernel/time/hrtimer.c:2124
hrtimer_run_softirq+0x1e3/0x2e0 kernel/time/hrtimer.c:2141
handle_softirqs+0x226/0x860 kernel/softirq.c:645
__do_softirq kernel/softirq.c:679 [inline]
invoke_softirq kernel/softirq.c:519 [inline]
__irq_exit_rcu+0xcb/0x220 kernel/softirq.c:758
irq_exit_rcu+0x9/0x30 kernel/softirq.c:775
instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1062 [inline]
sysvec_apic_timer_interrupt+0xa6/0xc0 arch/x86/kernel/apic/apic.c:1062
</IRQ>
<TASK>
asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:674
RIP: 0010:pv_native_safe_halt+0xf/0x20 arch/x86/kernel/paravirt.c:64
Code: 9c 8f 02 c3 cc cc cc cc cc cc cc 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 f3 0f 1e fa 66 90 0f 00 2d 33 91 24 00 fb f4 <e9> 8c 08 03 00 cc cc cc cc cc cc cc cc cc cc cc cc 90 90 90 90 90
RSP: 0018:ffffc900001a7e40 EFLAGS: 00000246
RAX: ffff888124dd2000 RBX: ffffffff819baed0 RCX: 8000000000000001
RDX: 0000000000000001 RSI: ffffffff8c6d9a60 RDI: ffffffff819baed0
RBP: ffffc900001a7f10 R08: ffff8880b8733a1b R09: 1ffff110170e6743
R10: dffffc0000000000 R11: ffffed10170e6744 R12: 0000000000000000
R13: 1ffff11003cd2bb8 R14: 1ffff92000034fd0 R15: dffffc0000000000
arch_safe_halt arch/x86/kernel/process.c:767 [inline]
default_idle+0x9/0x20 arch/x86/kernel/process.c:768
default_idle_call+0x72/0xb0 kernel/sched/idle.c:122
cpuidle_idle_call kernel/sched/idle.c:199 [inline]
do_idle+0x2e0/0x540 kernel/sched/idle.c:355
cpu_startup_entry+0x43/0x60 kernel/sched/idle.c:454
start_secondary+0x101/0x110 arch/x86/kernel/smpboot.c:312
common_startup_64+0x13e/0x157
</TASK>
BUG: sleeping function called from invalid context at ./include/linux/sched/mm.h:322
in_atomic(): 1, irqs_disabled(): 1, non_block: 0, pid: 0, name: swapper/1
preempt_count: 101, expected: 0
RCU nest depth: 0, expected: 0
INFO: lockdep is turned off.
irq event stamp: 323357
hardirqs last enabled at (323356): [<ffffffff8be7aee0>] __raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:210 [inline]
hardirqs last enabled at (323356): [<ffffffff8be7aee0>] _raw_spin_unlock_irqrestore+0x30/0x80 kernel/locking/spinlock.c:221
hardirqs last disabled at (323357): [<ffffffff8be7ac9a>] __raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:153 [inline]
hardirqs last disabled at (323357): [<ffffffff8be7ac9a>] _raw_spin_lock_irqsave+0x1a/0x60 kernel/locking/spinlock.c:181
softirqs last enabled at (323340): [<ffffffff8188fb2b>] __do_softirq kernel/softirq.c:679 [inline]
softirqs last enabled at (323340): [<ffffffff8188fb2b>] invoke_softirq kernel/softirq.c:519 [inline]
softirqs last enabled at (323340): [<ffffffff8188fb2b>] __irq_exit_rcu+0xcb/0x220 kernel/softirq.c:758
softirqs last disabled at (323353): [<ffffffff8188fb2b>] __do_softirq kernel/softirq.c:679 [inline]
softirqs last disabled at (323353): [<ffffffff8188fb2b>] invoke_softirq kernel/softirq.c:519 [inline]
softirqs last disabled at (323353): [<ffffffff8188fb2b>] __irq_exit_rcu+0xcb/0x220 kernel/softirq.c:758
Preemption disabled at:
[<0000000000000000>] 0x0
CPU: 1 UID: 0 PID: 0 Comm: swapper/1 Tainted: G W syzkaller #0 PREEMPT(full)
Tainted: [W]=WARN
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/24/2026
Call Trace:
<IRQ>
dump_stack_lvl+0xe8/0x150 lib/dump_stack.c:120
__might_resched+0x36a/0x4c0 kernel/sched/core.c:9256
might_alloc include/linux/sched/mm.h:322 [inline]
slab_pre_alloc_hook mm/slub.c:4636 [inline]
slab_alloc_node mm/slub.c:4974 [inline]
__do_kmalloc_node mm/slub.c:5413 [inline]
__kmalloc_node_track_caller_noprof+0xec/0x720 mm/slub.c:5545
alloc_dr drivers/base/devres.c:141 [inline]
devm_kmalloc+0x7f/0x340 drivers/base/devres.c:951
devm_kzalloc include/linux/device/devres.h:50 [inline]
mt_allocate_report_data drivers/hid/hid-multitouch.c:695 [inline]
mt_find_report_data+0xd1/0xc60 drivers/hid/hid-multitouch.c:745
mt_event+0x71/0x180 drivers/hid/hid-multitouch.c:1570
hid_process_event+0x436/0x620 drivers/hid/hid-core.c:1572
hid_process_report drivers/hid/hid-core.c:1730 [inline]
hid_report_raw_event+0xf6a/0x1900 drivers/hid/hid-core.c:2109
__hid_input_report+0x454/0x580 drivers/hid/hid-core.c:2180
hid_ctrl+0x204/0x580 drivers/hid/usbhid/hid-core.c:486
__usb_hcd_giveback_urb+0x378/0x540 drivers/usb/core/hcd.c:1657
dummy_timer+0xa91/0x4cf0 drivers/usb/gadget/udc/dummy_hcd.c:2019
__run_hrtimer kernel/time/hrtimer.c:2067 [inline]
__hrtimer_run_queues+0x3bc/0xa10 kernel/time/hrtimer.c:2124
hrtimer_run_softirq+0x1e3/0x2e0 kernel/time/hrtimer.c:2141
handle_softirqs+0x226/0x860 kernel/softirq.c:645
__do_softirq kernel/softirq.c:679 [inline]
invoke_softirq kernel/softirq.c:519 [inline]
__irq_exit_rcu+0xcb/0x220 kernel/softirq.c:758
irq_exit_rcu+0x9/0x30 kernel/softirq.c:775
instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1062 [inline]
sysvec_apic_timer_interrupt+0xa6/0xc0 arch/x86/kernel/apic/apic.c:1062
</IRQ>
<TASK>
asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:674
RIP: 0010:pv_native_safe_halt+0xf/0x20 arch/x86/kernel/paravirt.c:64
Code: 9c 8f 02 c3 cc cc cc cc cc cc cc 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 f3 0f 1e fa 66 90 0f 00 2d 33 91 24 00 fb f4 <e9> 8c 08 03 00 cc cc cc cc cc cc cc cc cc cc cc cc 90 90 90 90 90
RSP: 0018:ffffc900001a7e40 EFLAGS: 00000246
RAX: ffff888124dd2000 RBX: ffffffff819baed0 RCX: 8000000000000001
RDX: 0000000000000001 RSI: ffffffff8c6d9a60 RDI: ffffffff819baed0
RBP: ffffc900001a7f10 R08: ffff8880b8733a1b R09: 1ffff110170e6743
R10: dffffc0000000000 R11: ffffed10170e6744 R12: 0000000000000000
R13: 1ffff11003cd2bb8 R14: 1ffff92000034fd0 R15: dffffc0000000000
arch_safe_halt arch/x86/kernel/process.c:767 [inline]
default_idle+0x9/0x20 arch/x86/kernel/process.c:768
default_idle_call+0x72/0xb0 kernel/sched/idle.c:122
cpuidle_idle_call kernel/sched/idle.c:199 [inline]
do_idle+0x2e0/0x540 kernel/sched/idle.c:355
cpu_startup_entry+0x43/0x60 kernel/sched/idle.c:454
start_secondary+0x101/0x110 arch/x86/kernel/smpboot.c:312
common_startup_64+0x13e/0x157
</TASK>
BUG: sleeping function called from invalid context at ./include/linux/sched/mm.h:322
in_atomic(): 1, irqs_disabled(): 1, non_block: 0, pid: 0, name: swapper/1
preempt_count: 101, expected: 0
RCU nest depth: 0, expected: 0
INFO: lockdep is turned off.
irq event stamp: 323357
hardirqs last enabled at (323356): [<ffffffff8be7aee0>] __raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:210 [inline]
hardirqs last enabled at (323356): [<ffffffff8be7aee0>] _raw_spin_unlock_irqrestore+0x30/0x80 kernel/locking/spinlock.c:221
hardirqs last disabled at (323357): [<ffffffff8be7ac9a>] __raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:153 [inline]
hardirqs last disabled at (323357): [<ffffffff8be7ac9a>] _raw_spin_lock_irqsave+0x1a/0x60 kernel/locking/spinlock.c:181
softirqs last enabled at (323340): [<ffffffff8188fb2b>] __do_softirq kernel/softirq.c:679 [inline]
softirqs last enabled at (323340): [<ffffffff8188fb2b>] invoke_softirq kernel/softirq.c:519 [inline]
softirqs last enabled at (323340): [<ffffffff8188fb2b>] __irq_exit_rcu+0xcb/0x220 kernel/softirq.c:758
softirqs last disabled at (323353): [<ffffffff8188fb2b>] __do_softirq kernel/softirq.c:679 [inline]
softirqs last disabled at (323353): [<ffffffff8188fb2b>] invoke_softirq kernel/softirq.c:519 [inline]
softirqs last disabled at (323353): [<ffffffff8188fb2b>] __irq_exit_rcu+0xcb/0x220 kernel/softirq.c:758
Preemption disabled at:
[<0000000000000000>] 0x0
CPU: 1 UID: 0 PID: 0 Comm: swapper/1 Tainted: G W syzkaller #0 PREEMPT(full)
Tainted: [W]=WARN
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/24/2026
Call Trace:
<IRQ>
dump_stack_lvl+0xe8/0x150 lib/dump_stack.c:120
__might_resched+0x36a/0x4c0 kernel/sched/core.c:9256
might_alloc include/linux/sched/mm.h:322 [inline]
slab_pre_alloc_hook mm/slub.c:4636 [inline]
slab_alloc_node mm/slub.c:4974 [inline]
__do_kmalloc_node mm/slub.c:5413 [inline]
__kmalloc_node_track_caller_noprof+0xec/0x720 mm/slub.c:5545
alloc_dr drivers/base/devres.c:141 [inline]
devm_kmalloc+0x7f/0x340 drivers/base/devres.c:951
devm_kzalloc include/linux/device/devres.h:50 [inline]
mt_allocate_report_data drivers/hid/hid-multitouch.c:695 [inline]
mt_find_report_data+0xd1/0xc60 drivers/hid/hid-multitouch.c:745
mt_event+0x71/0x180 drivers/hid/hid-multitouch.c:1570
hid_process_event+0x436/0x620 drivers/hid/hid-core.c:1572
hid_process_report drivers/hid/hid-core.c:1730 [inline]
hid_report_raw_event+0xf6a/0x1900 drivers/hid/hid-core.c:2109
__hid_input_report+0x454/0x580 drivers/hid/hid-core.c:2180
hid_ctrl+0x204/0x580 drivers/hid/usbhid/hid-core.c:486
__usb_hcd_giveback_urb+0x378/0x540 drivers/usb/core/hcd.c:1657
dummy_timer+0xa91/0x4cf0 drivers/usb/gadget/udc/dummy_hcd.c:2019
__run_hrtimer kernel/time/hrtimer.c:2067 [inline]
__hrtimer_run_queues+0x3bc/0xa10 kernel/time/hrtimer.c:2124
hrtimer_run_softirq+0x1e3/0x2e0 kernel/time/hrtimer.c:2141
handle_softirqs+0x226/0x860 kernel/softirq.c:645
__do_softirq kernel/softirq.c:679 [inline]
invoke_softirq kernel/softirq.c:519 [inline]
__irq_exit_rcu+0xcb/0x220 kernel/softirq.c:758
irq_exit_rcu+0x9/0x30 kernel/softirq.c:775
instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1062 [inline]
sysvec_apic_timer_interrupt+0xa6/0xc0 arch/x86/kernel/apic/apic.c:1062
</IRQ>
<TASK>
asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:674
RIP: 0010:pv_native_safe_halt+0xf/0x20 arch/x86/kernel/paravirt.c:64
Code: 9c 8f 02 c3 cc cc cc cc cc cc cc 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 f3 0f 1e fa 66 90 0f 00 2d 33 91 24 00 fb f4 <e9> 8c 08 03 00 cc cc cc cc cc cc cc cc cc cc cc cc 90 90 90 90 90
RSP: 0018:ffffc900001a7e40 EFLAGS: 00000246
RAX: ffff888124dd2000 RBX: ffffffff819baed0 RCX: 8000000000000001
RDX: 0000000000000001 RSI: ffffffff8c6d9a60 RDI: ffffffff819baed0
RBP: ffffc900001a7f10 R08: ffff8880b8733a1b R09: 1ffff110170e6743
R10: dffffc0000000000 R11: ffffed10170e6744 R12: 0000000000000000
R13: 1ffff11003cd2bb8 R14: 1ffff92000034fd0 R15: dffffc0000000000
arch_safe_halt arch/x86/kernel/process.c:767 [inline]
default_idle+0x9/0x20 arch/x86/kernel/process.c:768
default_idle_call+0x72/0xb0 kernel/sched/idle.c:122
cpuidle_idle_call kernel/sched/idle.c:199 [inline]
do_idle+0x2e0/0x540 kernel/sched/idle.c:355
cpu_startup_entry+0x43/0x60 kernel/sched/idle.c:454
start_secondary+0x101/0x110 arch/x86/kernel/smpboot.c:312
common_startup_64+0x13e/0x157
</TASK>
----------------
Code disassembly (best guess):
0: 9c pushf
1: 8f 02 pop (%rdx)
3: c3 ret
4: cc int3
5: cc int3
6: cc int3
7: cc int3
8: cc int3
9: cc int3
a: cc int3
b: 90 nop
c: 90 nop
d: 90 nop
e: 90 nop
f: 90 nop
10: 90 nop
11: 90 nop
12: 90 nop
13: 90 nop
14: 90 nop
15: 90 nop
16: 90 nop
17: 90 nop
18: 90 nop
19: 90 nop
1a: 90 nop
1b: f3 0f 1e fa endbr64
1f: 66 90 xchg %ax,%ax
21: 0f 00 2d 33 91 24 00 verw 0x249133(%rip) # 0x24915b
28: fb sti
29: f4 hlt
* 2a: e9 8c 08 03 00 jmp 0x308bb <-- trapping instruction
2f: cc int3
30: cc int3
31: cc int3
32: cc int3
33: cc int3
34: cc int3
35: cc int3
36: cc int3
37: cc int3
38: cc int3
39: cc int3
3a: cc int3
3b: 90 nop
3c: 90 nop
3d: 90 nop
3e: 90 nop
3f: 90 nop
Struck through repros no longer work on HEAD.