inconsistent lock state in fs_reclaim_acquire (4)

Status: upstream: reported C repro on 2026/09/09 22:45
Subsystems: cgroups mm
Labels: prio:high
[Documentation on labels]
Reported-by: syzbot+093e05755c2d99caab91@syzkaller.appspotmail.com
First crash: 46d, last: 3d02h
Cause bisection: failed (error log, bisect log)
  
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ID Workflow Result Correct Bug Created Started Finished Revision
4093808b assessment-security DenialOfService: ✅ Exploitable: ❌ FilesystemTrigger: ❌ NetworkTrigger: ❌ PeripheralTrigger: ✅ RemoteTrigger: ❌ Unprivileged: ❌ UserNamespace: ❌ VMGuestTrigger: ❌ VMHostTrigger: ❌ ❓ inconsistent lock state in fs_reclaim_acquire (4) 2026/09/10 00:01 2026/09/10 00:01 2026/09/10 00:39 b31349d1
▶ ▼ Discussions (6)
Title Replies (including bot) Last reply
[syzbot] [mm?] [cgroups?] inconsistent lock state in fs_reclaim_acquire (4) 2 (4) 2026/09/10 23:49
Re: [PATCH v2] HID: multitouch: use GFP_ATOMIC for report/application/usage allocations 1 (1) 2026/09/10 16:55
Re: [PATCH v3] HID: multitouch: use GFP_ATOMIC for report/application/usage allocations 1 (1) 2026/09/10 16:54
Re: [PATCH v2] HID: multitouch: use GFP_ATOMIC for report/application/usage allocations 1 (1) 2026/09/10 16:27
[PATCH v2] HID: multitouch: use GFP_ATOMIC for report/application allocations 1 (1) 2026/09/10 16:23
[PATCH] HID: multitouch: use GFP_ATOMIC for report/application/usage allocations 1 (1) 2026/09/10 15:37
▶ ▼ Similar bugs (4)
Kernel Title Rank 🛈 Repro Cause bisect Fix bisect Count Last Reported Patched Status
upstream inconsistent lock state in fs_reclaim_acquire kernel 4 syz, C 36235 3092d 3102d 5/29 fixed on 2018/05/08 18:30
linux-4.14 inconsistent lock state in fs_reclaim_acquire 4 4 2731d 2748d 0/1 auto-closed as invalid on 2019/10/25 08:45
upstream inconsistent lock state in fs_reclaim_acquire (2) kernel 4 211 2857d 3090d 0/29 auto-closed as invalid on 2019/06/26 10:05
upstream inconsistent lock state in fs_reclaim_acquire (3) kernel 4 syz, C 2 1453d 1459d 22/29 fixed on 2023/02/24 13:51

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

Crashes (19):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2026/09/21 10:47 upstream 50d05c7c76c9 853b104b .config console log report syz / log C [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-386 inconsistent lock state in fs_reclaim_acquire
2026/10/22 05:34 upstream 4df4d2a577db 4ba27f85 .config console log report syz / log C [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream inconsistent lock state in fs_reclaim_acquire
2026/09/29 07:34 upstream 72d3fcf802c4 7bf4ea23 .config console log report syz / log C [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream inconsistent lock state in fs_reclaim_acquire
2026/09/28 16:14 upstream 72d3fcf802c4 a3c7249d .config console log report syz / log C [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream-386 inconsistent lock state in fs_reclaim_acquire
2026/10/08 05:45 net 6d25ffca055a 6520ecdb .config strace log report syz / log C [disk image] [vmlinux] [kernel image] ci-upstream-net-this-kasan-gce inconsistent lock state in fs_reclaim_acquire
2026/09/09 10:14 https://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb.git usb-testing 34c9c5517033 8387c273 .config console log report syz / log C [disk image] [vmlinux] [kernel image] ci2-upstream-usb inconsistent lock state in fs_reclaim_acquire
2026/09/09 09:18 https://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb.git usb-testing 34c9c5517033 8387c273 .config console log report syz / log C [disk image] [vmlinux] [kernel image] ci2-upstream-usb inconsistent lock state in fs_reclaim_acquire
2026/09/09 08:21 https://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb.git usb-testing 34c9c5517033 8387c273 .config console log report syz / log C [disk image] [vmlinux] [kernel image] ci2-upstream-usb inconsistent lock state in fs_reclaim_acquire
2026/09/09 07:18 https://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb.git usb-testing 34c9c5517033 8387c273 .config console log report syz / log C [disk image] [vmlinux] [kernel image] ci2-upstream-usb inconsistent lock state in fs_reclaim_acquire
2026/09/30 18:33 upstream 551c722f4080 892a21ec .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-badwrites-root inconsistent lock state in fs_reclaim_acquire
2026/09/30 18:32 upstream 551c722f4080 892a21ec .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-badwrites-root inconsistent lock state in fs_reclaim_acquire
2026/09/30 14:52 upstream 551c722f4080 7808aef4 .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root inconsistent lock state in fs_reclaim_acquire
2026/09/30 14:52 upstream 551c722f4080 7808aef4 .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root inconsistent lock state in fs_reclaim_acquire
2026/09/30 14:52 upstream 551c722f4080 7808aef4 .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root inconsistent lock state in fs_reclaim_acquire
2026/09/30 14:52 upstream 551c722f4080 7808aef4 .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root inconsistent lock state in fs_reclaim_acquire
2026/10/06 16:14 https://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb.git usb-testing 5926a7da8789 f7710056 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-usb inconsistent lock state in fs_reclaim_acquire
2026/10/05 15:12 https://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb.git usb-testing 5926a7da8789 af63e995 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-usb inconsistent lock state in fs_reclaim_acquire
2026/09/30 19:34 linux-next 6c2cb8b8b843 892a21ec .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-linux-next-kasan-gce-root inconsistent lock state in fs_reclaim_acquire
2026/09/09 05:05 https://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb.git usb-testing 34c9c5517033 8387c273 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-usb inconsistent lock state in fs_reclaim_acquire
* Struck through repros no longer work on HEAD.