FAULT_INJECTION: forcing a failure.
name fail_usercopy, interval 1, probability 0, space 0, times 0
======================================================
WARNING: possible circular locking dependency detected
6.16.0-rc7-syzkaller-00140-gec2df4364666 #0 Not tainted
------------------------------------------------------
syz.0.3722/19744 is trying to acquire lock:
ffffffff8e4d2380 (console_owner){-.-.}-{0:0}, at: console_lock_spinning_enable+0x9f/0xd0 kernel/printk/printk.c:1924
but task is already holding lock:
ffff8880b843a2d8 (&rq->__lock){-.-.}-{2:2}, at: raw_spin_rq_lock_nested kernel/sched/core.c:614 [inline]
ffff8880b843a2d8 (&rq->__lock){-.-.}-{2:2}, at: raw_spin_rq_lock_nested+0x7e/0x130 kernel/sched/core.c:599
which lock already depends on the new lock.
the existing dependency chain (in reverse order) is:
-> #4 (&rq->__lock){-.-.}-{2:2}:
_raw_spin_lock_nested+0x31/0x40 kernel/locking/spinlock.c:378
raw_spin_rq_lock_nested+0x29/0x130 kernel/sched/core.c:606
raw_spin_rq_lock kernel/sched/sched.h:1532 [inline]
task_rq_lock+0xcf/0x490 kernel/sched/core.c:708
cgroup_move_task+0x81/0x2a0 kernel/sched/psi.c:1161
css_set_move_task+0x288/0x5f0 kernel/cgroup/cgroup.c:918
cgroup_post_fork+0x201/0x9e0 kernel/cgroup/cgroup.c:6754
copy_process+0x5c82/0x7650 kernel/fork.c:2413
kernel_clone+0xfc/0x960 kernel/fork.c:2599
user_mode_thread+0xc7/0x110 kernel/fork.c:2677
rest_init+0x23/0x2b0 init/main.c:710
start_kernel+0x3ee/0x4d0 init/main.c:1102
x86_64_start_reservations+0x18/0x30 arch/x86/kernel/head64.c:307
x86_64_start_kernel+0x130/0x190 arch/x86/kernel/head64.c:288
common_startup_64+0x13e/0x148
-> #3 (&p->pi_lock){-.-.}-{2:2}:
__raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:110 [inline]
_raw_spin_lock_irqsave+0x3a/0x60 kernel/locking/spinlock.c:162
class_raw_spinlock_irqsave_constructor include/linux/spinlock.h:557 [inline]
try_to_wake_up+0xb2/0x1680 kernel/sched/core.c:4227
__wake_up_common+0x132/0x1f0 kernel/sched/wait.c:89
__wake_up_common_lock kernel/sched/wait.c:106 [inline]
__wake_up+0x31/0x60 kernel/sched/wait.c:127
tty_port_default_wakeup+0x2a/0x40 drivers/tty/tty_port.c:69
serial8250_tx_chars+0x68e/0x860 drivers/tty/serial/8250/8250_port.c:1838
serial8250_handle_irq+0x761/0xcb0 drivers/tty/serial/8250/8250_port.c:1946
serial8250_default_handle_irq+0x9a/0x210 drivers/tty/serial/8250/8250_port.c:1966
serial8250_interrupt+0x106/0x210 drivers/tty/serial/8250/8250_core.c:86
__handle_irq_event_percpu+0x22c/0x7d0 kernel/irq/handle.c:158
handle_irq_event_percpu kernel/irq/handle.c:193 [inline]
handle_irq_event+0xab/0x1e0 kernel/irq/handle.c:210
handle_edge_irq+0x28e/0xab0 kernel/irq/chip.c:797
generic_handle_irq_desc include/linux/irqdesc.h:173 [inline]
handle_irq arch/x86/kernel/irq.c:254 [inline]
call_irq_handler arch/x86/kernel/irq.c:266 [inline]
__common_interrupt+0xdf/0x250 arch/x86/kernel/irq.c:292
common_interrupt+0xba/0xe0 arch/x86/kernel/irq.c:285
asm_common_interrupt+0x26/0x40 arch/x86/include/asm/idtentry.h:693
native_safe_halt arch/x86/include/asm/irqflags.h:48 [inline]
pv_native_safe_halt+0xf/0x20 arch/x86/kernel/paravirt.c:81
arch_safe_halt arch/x86/include/asm/paravirt.h:107 [inline]
default_idle+0x13/0x20 arch/x86/kernel/process.c:749
default_idle_call+0x6d/0xb0 kernel/sched/idle.c:117
cpuidle_idle_call kernel/sched/idle.c:185 [inline]
do_idle+0x391/0x510 kernel/sched/idle.c:325
cpu_startup_entry+0x4f/0x60 kernel/sched/idle.c:423
start_secondary+0x21d/0x2b0 arch/x86/kernel/smpboot.c:315
common_startup_64+0x13e/0x148
-> #2 (&tty->write_wait){-.-.}-{3:3}:
__raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:110 [inline]
_raw_spin_lock_irqsave+0x3a/0x60 kernel/locking/spinlock.c:162
__wake_up_common_lock kernel/sched/wait.c:105 [inline]
__wake_up+0x1c/0x60 kernel/sched/wait.c:127
tty_port_default_wakeup+0x2a/0x40 drivers/tty/tty_port.c:69
serial8250_tx_chars+0x68e/0x860 drivers/tty/serial/8250/8250_port.c:1838
serial8250_handle_irq+0x761/0xcb0 drivers/tty/serial/8250/8250_port.c:1946
serial8250_default_handle_irq+0x9a/0x210 drivers/tty/serial/8250/8250_port.c:1966
serial8250_interrupt+0x106/0x210 drivers/tty/serial/8250/8250_core.c:86
__handle_irq_event_percpu+0x22c/0x7d0 kernel/irq/handle.c:158
handle_irq_event_percpu kernel/irq/handle.c:193 [inline]
handle_irq_event+0xab/0x1e0 kernel/irq/handle.c:210
handle_edge_irq+0x28e/0xab0 kernel/irq/chip.c:797
generic_handle_irq_desc include/linux/irqdesc.h:173 [inline]
handle_irq arch/x86/kernel/irq.c:254 [inline]
call_irq_handler arch/x86/kernel/irq.c:266 [inline]
__common_interrupt+0xdf/0x250 arch/x86/kernel/irq.c:292
common_interrupt+0xba/0xe0 arch/x86/kernel/irq.c:285
asm_common_interrupt+0x26/0x40 arch/x86/include/asm/idtentry.h:693
native_safe_halt arch/x86/include/asm/irqflags.h:48 [inline]
pv_native_safe_halt+0xf/0x20 arch/x86/kernel/paravirt.c:81
arch_safe_halt arch/x86/include/asm/paravirt.h:107 [inline]
default_idle+0x13/0x20 arch/x86/kernel/process.c:749
default_idle_call+0x6d/0xb0 kernel/sched/idle.c:117
cpuidle_idle_call kernel/sched/idle.c:185 [inline]
do_idle+0x391/0x510 kernel/sched/idle.c:325
cpu_startup_entry+0x4f/0x60 kernel/sched/idle.c:423
start_secondary+0x21d/0x2b0 arch/x86/kernel/smpboot.c:315
common_startup_64+0x13e/0x148
-> #1 (&port_lock_key){-.-.}-{3:3}:
__raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:110 [inline]
_raw_spin_lock_irqsave+0x3a/0x60 kernel/locking/spinlock.c:162
uart_port_lock_irqsave include/linux/serial_core.h:717 [inline]
serial8250_console_write+0x181/0x1890 drivers/tty/serial/8250/8250_port.c:3415
console_emit_next_record kernel/printk/printk.c:3138 [inline]
console_flush_all+0x801/0xc60 kernel/printk/printk.c:3226
__console_flush_and_unlock kernel/printk/printk.c:3285 [inline]
console_unlock+0xd8/0x210 kernel/printk/printk.c:3325
vprintk_emit+0x418/0x6d0 kernel/printk/printk.c:2450
_printk+0xc7/0x100 kernel/printk/printk.c:2475
register_console+0xc2d/0x11b0 kernel/printk/printk.c:4125
univ8250_console_init+0x5f/0x90 drivers/tty/serial/8250/8250_core.c:513
console_init+0x14f/0x680 kernel/printk/printk.c:4323
start_kernel+0x29f/0x4d0 init/main.c:1036
x86_64_start_reservations+0x18/0x30 arch/x86/kernel/head64.c:307
x86_64_start_kernel+0x130/0x190 arch/x86/kernel/head64.c:288
common_startup_64+0x13e/0x148
-> #0 (console_owner){-.-.}-{0:0}:
check_prev_add kernel/locking/lockdep.c:3168 [inline]
check_prevs_add kernel/locking/lockdep.c:3287 [inline]
validate_chain kernel/locking/lockdep.c:3911 [inline]
__lock_acquire+0x126f/0x1c90 kernel/locking/lockdep.c:5240
lock_acquire kernel/locking/lockdep.c:5871 [inline]
lock_acquire+0x179/0x350 kernel/locking/lockdep.c:5828
console_lock_spinning_enable+0xb0/0xd0 kernel/printk/printk.c:1924
console_emit_next_record kernel/printk/printk.c:3132 [inline]
console_flush_all+0x7aa/0xc60 kernel/printk/printk.c:3226
__console_flush_and_unlock kernel/printk/printk.c:3285 [inline]
console_unlock+0xd8/0x210 kernel/printk/printk.c:3325
vprintk_emit+0x418/0x6d0 kernel/printk/printk.c:2450
_printk+0xc7/0x100 kernel/printk/printk.c:2475
fail_dump lib/fault-inject.c:66 [inline]
should_fail_ex+0x4e7/0x640 lib/fault-inject.c:174
strncpy_from_user+0x3b/0x2e0 lib/strncpy_from_user.c:118
strncpy_from_user_nofault+0x7f/0x180 mm/maccess.c:193
bpf_probe_read_user_str_common kernel/trace/bpf_trace.c:215 [inline]
____bpf_probe_read_user_str kernel/trace/bpf_trace.c:224 [inline]
bpf_probe_read_user_str+0x26/0x70 kernel/trace/bpf_trace.c:221
bpf_prog_bc7c5c6b9645592f+0x3e/0x44
bpf_dispatcher_nop_func include/linux/bpf.h:1322 [inline]
__bpf_prog_run include/linux/filter.h:718 [inline]
bpf_prog_run include/linux/filter.h:725 [inline]
__bpf_trace_run kernel/trace/bpf_trace.c:2258 [inline]
bpf_trace_run4+0x24c/0x5a0 kernel/trace/bpf_trace.c:2301
__bpf_trace_sched_switch+0x145/0x190 include/trace/events/sched.h:220
__traceiter_sched_switch+0x6f/0xc0 include/trace/events/sched.h:220
__do_trace_sched_switch include/trace/events/sched.h:220 [inline]
trace_sched_switch include/trace/events/sched.h:220 [inline]
__schedule+0x1bee/0x5dd0 kernel/sched/core.c:6783
preempt_schedule_irq+0x51/0x90 kernel/sched/core.c:7109
irqentry_exit+0x36/0x90 kernel/entry/common.c:307
asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702
page_counter_cancel+0x0/0x170 mm/page_counter.c:45
page_counter_uncharge+0x32/0x70 mm/page_counter.c:184
obj_cgroup_uncharge_pages+0x31/0x1e0 mm/memcontrol.c:2778
__memcg_slab_free_hook+0x2db/0x5d0 mm/memcontrol.c:3217
memcg_slab_free_hook mm/slub.c:2206 [inline]
slab_free mm/slub.c:4640 [inline]
kmem_cache_free+0x37e/0x4d0 mm/slub.c:4745
put_task_struct include/linux/sched/task.h:145 [inline]
put_task_struct include/linux/sched/task.h:132 [inline]
css_task_iter_end+0x2d9/0x380 kernel/cgroup/cgroup.c:5092
__cgroup_procs_start+0x231/0x2e0 kernel/cgroup/cgroup.c:5132
kernfs_seq_start+0xdb/0x240 fs/kernfs/file.c:160
seq_read_iter+0x2c1/0x12c0 fs/seq_file.c:225
kernfs_fop_read_iter+0x40f/0x5a0 fs/kernfs/file.c:279
do_iter_readv_writev+0x738/0x950 fs/read_write.c:825
vfs_readv+0x4cb/0x8b0 fs/read_write.c:1018
do_readv+0x132/0x340 fs/read_write.c:1080
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0xcd/0x4c0 arch/x86/entry/syscall_64.c:94
entry_SYSCALL_64_after_hwframe+0x77/0x7f
other info that might help us debug this:
Chain exists of:
console_owner --> &p->pi_lock --> &rq->__lock
Possible unsafe locking scenario:
CPU0 CPU1
---- ----
lock(&rq->__lock);
lock(&p->pi_lock);
lock(&rq->__lock);
lock(console_owner);
*** DEADLOCK ***
9 locks held by syz.0.3722/19744:
#0: ffff888036aaa9b8 (&f->f_pos_lock){+.+.}-{4:4}, at: fdget_pos+0x2a2/0x370 fs/file.c:1217
#1: ffff88803393d668 (&p->lock){+.+.}-{4:4}, at: seq_read_iter+0xe1/0x12c0 fs/seq_file.c:182
#2: ffff88804f45a088 (&of->mutex){+.+.}-{4:4}, at: kernfs_seq_start+0x4d/0x240 fs/kernfs/file.c:154
#3: ffff88803591af08 (kn->active#69){++++}-{0:0}, at: kernfs_seq_start+0x71/0x240 fs/kernfs/file.c:155
#4: ffffffff8e61a8c0 (put_task_map-wait-type-override#5){+.+.}-{4:4}, at: put_task_struct include/linux/sched/task.h:144 [inline]
#4: ffffffff8e61a8c0 (put_task_map-wait-type-override#5){+.+.}-{4:4}, at: put_task_struct include/linux/sched/task.h:132 [inline]
#4: ffffffff8e61a8c0 (put_task_map-wait-type-override#5){+.+.}-{4:4}, at: css_task_iter_end+0x2b2/0x380 kernel/cgroup/cgroup.c:5092
#5: ffff8880b843a2d8 (&rq->__lock){-.-.}-{2:2}, at: raw_spin_rq_lock_nested kernel/sched/core.c:614 [inline]
#5: ffff8880b843a2d8 (&rq->__lock){-.-.}-{2:2}, at: raw_spin_rq_lock_nested+0x7e/0x130 kernel/sched/core.c:599
#6: ffffffff8e5c4e00 (rcu_read_lock){....}-{1:3}, at: rcu_lock_acquire include/linux/rcupdate.h:331 [inline]
#6: ffffffff8e5c4e00 (rcu_read_lock){....}-{1:3}, at: rcu_read_lock include/linux/rcupdate.h:841 [inline]
#6: ffffffff8e5c4e00 (rcu_read_lock){....}-{1:3}, at: __bpf_trace_run kernel/trace/bpf_trace.c:2257 [inline]
#6: ffffffff8e5c4e00 (rcu_read_lock){....}-{1:3}, at: bpf_trace_run4+0x1cf/0x5a0 kernel/trace/bpf_trace.c:2301
#7: ffffffff8e5b27c0 (console_lock){+.+.}-{0:0}, at: _printk+0xc7/0x100 kernel/printk/printk.c:2475
#8: ffffffff8e5b2830 (console_srcu){....}-{0:0}, at: rcu_try_lock_acquire include/linux/rcupdate.h:336 [inline]
#8: ffffffff8e5b2830 (console_srcu){....}-{0:0}, at: srcu_read_lock_nmisafe include/linux/srcu.h:346 [inline]
#8: ffffffff8e5b2830 (console_srcu){....}-{0:0}, at: console_srcu_read_lock kernel/printk/printk.c:288 [inline]
#8: ffffffff8e5b2830 (console_srcu){....}-{0:0}, at: console_flush_all+0x158/0xc60 kernel/printk/printk.c:3203
stack backtrace:
CPU: 1 UID: 0 PID: 19744 Comm: syz.0.3722 Not tainted 6.16.0-rc7-syzkaller-00140-gec2df4364666 #0 PREEMPT(full)
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/12/2025
Call Trace:
__dump_stack lib/dump_stack.c:94 [inline]
dump_stack_lvl+0x116/0x1f0 lib/dump_stack.c:120
print_circular_bug+0x275/0x350 kernel/locking/lockdep.c:2046
check_noncircular+0x14c/0x170 kernel/locking/lockdep.c:2178
check_prev_add kernel/locking/lockdep.c:3168 [inline]
check_prevs_add kernel/locking/lockdep.c:3287 [inline]
validate_chain kernel/locking/lockdep.c:3911 [inline]
__lock_acquire+0x126f/0x1c90 kernel/locking/lockdep.c:5240
lock_acquire kernel/locking/lockdep.c:5871 [inline]
lock_acquire+0x179/0x350 kernel/locking/lockdep.c:5828
console_lock_spinning_enable+0xb0/0xd0 kernel/printk/printk.c:1924
console_emit_next_record kernel/printk/printk.c:3132 [inline]
console_flush_all+0x7aa/0xc60 kernel/printk/printk.c:3226
__console_flush_and_unlock kernel/printk/printk.c:3285 [inline]
console_unlock+0xd8/0x210 kernel/printk/printk.c:3325
vprintk_emit+0x418/0x6d0 kernel/printk/printk.c:2450
_printk+0xc7/0x100 kernel/printk/printk.c:2475
fail_dump lib/fault-inject.c:66 [inline]
should_fail_ex+0x4e7/0x640 lib/fault-inject.c:174
strncpy_from_user+0x3b/0x2e0 lib/strncpy_from_user.c:118
strncpy_from_user_nofault+0x7f/0x180 mm/maccess.c:193
bpf_probe_read_user_str_common kernel/trace/bpf_trace.c:215 [inline]
____bpf_probe_read_user_str kernel/trace/bpf_trace.c:224 [inline]
bpf_probe_read_user_str+0x26/0x70 kernel/trace/bpf_trace.c:221
bpf_prog_bc7c5c6b9645592f+0x3e/0x44
bpf_dispatcher_nop_func include/linux/bpf.h:1322 [inline]
__bpf_prog_run include/linux/filter.h:718 [inline]
bpf_prog_run include/linux/filter.h:725 [inline]
__bpf_trace_run kernel/trace/bpf_trace.c:2258 [inline]
bpf_trace_run4+0x24c/0x5a0 kernel/trace/bpf_trace.c:2301
__bpf_trace_sched_switch+0x145/0x190 include/trace/events/sched.h:220
__traceiter_sched_switch+0x6f/0xc0 include/trace/events/sched.h:220
__do_trace_sched_switch include/trace/events/sched.h:220 [inline]
trace_sched_switch include/trace/events/sched.h:220 [inline]
__schedule+0x1bee/0x5dd0 kernel/sched/core.c:6783
preempt_schedule_irq+0x51/0x90 kernel/sched/core.c:7109
irqentry_exit+0x36/0x90 kernel/entry/common.c:307
asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702
RIP: 0010:page_counter_cancel+0x0/0x170 mm/page_counter.c:55
Code: ff e9 bc fe ff ff e8 9f ec f8 ff e9 2d ff ff ff e8 95 ec f8 ff eb 9a 0f 1f 00 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 <66> 0f 1f 00 41 55 41 54 49 89 f4 55 53 48 89 fb e8 8b 98 93 ff be
RSP: 0018:ffffc90003c4f8a0 EFLAGS: 00000293
RAX: 0000000000000000 RBX: ffff888077fb1680 RCX: 0000000000000000
RDX: ffff88807dbb0000 RSI: 0000000000000002 RDI: ffff888077fb1680
RBP: 0000000000000002 R08: 0000000000000000 R09: fffffbfff215284a
R10: ffffffff90a94257 R11: 0000000000000001 R12: dffffc0000000000
R13: ffff88814040a500 R14: 0000000000000000 R15: ffffc90003c4f980
page_counter_uncharge+0x32/0x70 mm/page_counter.c:184
obj_cgroup_uncharge_pages+0x31/0x1e0 mm/memcontrol.c:2778
__memcg_slab_free_hook+0x2db/0x5d0 mm/memcontrol.c:3217
memcg_slab_free_hook mm/slub.c:2206 [inline]
slab_free mm/slub.c:4640 [inline]
kmem_cache_free+0x37e/0x4d0 mm/slub.c:4745
put_task_struct include/linux/sched/task.h:145 [inline]
put_task_struct include/linux/sched/task.h:132 [inline]
css_task_iter_end+0x2d9/0x380 kernel/cgroup/cgroup.c:5092
__cgroup_procs_start+0x231/0x2e0 kernel/cgroup/cgroup.c:5132
kernfs_seq_start+0xdb/0x240 fs/kernfs/file.c:160
seq_read_iter+0x2c1/0x12c0 fs/seq_file.c:225
kernfs_fop_read_iter+0x40f/0x5a0 fs/kernfs/file.c:279
do_iter_readv_writev+0x738/0x950 fs/read_write.c:825
vfs_readv+0x4cb/0x8b0 fs/read_write.c:1018
do_readv+0x132/0x340 fs/read_write.c:1080
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0xcd/0x4c0 arch/x86/entry/syscall_64.c:94
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fe46458e9a9
Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 a8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007fe465404038 EFLAGS: 00000246 ORIG_RAX: 0000000000000013
RAX: ffffffffffffffda RBX: 00007fe4647b6080 RCX: 00007fe46458e9a9
RDX: 0000000000000001 RSI: 0000200000000340 RDI: 0000000000000004
RBP: 00007fe465404090 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000001
R13: 0000000000000001 R14: 00007fe4647b6080 R15: 00007ffe05027898
CPU: 1 UID: 0 PID: 19744 Comm: syz.0.3722 Not tainted 6.16.0-rc7-syzkaller-00140-gec2df4364666 #0 PREEMPT(full)
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/12/2025
Call Trace:
__dump_stack lib/dump_stack.c:94 [inline]
dump_stack_lvl+0x116/0x1f0 lib/dump_stack.c:120
fail_dump lib/fault-inject.c:73 [inline]
should_fail_ex+0x512/0x640 lib/fault-inject.c:174
strncpy_from_user+0x3b/0x2e0 lib/strncpy_from_user.c:118
strncpy_from_user_nofault+0x7f/0x180 mm/maccess.c:193
bpf_probe_read_user_str_common kernel/trace/bpf_trace.c:215 [inline]
____bpf_probe_read_user_str kernel/trace/bpf_trace.c:224 [inline]
bpf_probe_read_user_str+0x26/0x70 kernel/trace/bpf_trace.c:221
bpf_prog_bc7c5c6b9645592f+0x3e/0x44
bpf_dispatcher_nop_func include/linux/bpf.h:1322 [inline]
__bpf_prog_run include/linux/filter.h:718 [inline]
bpf_prog_run include/linux/filter.h:725 [inline]
__bpf_trace_run kernel/trace/bpf_trace.c:2258 [inline]
bpf_trace_run4+0x24c/0x5a0 kernel/trace/bpf_trace.c:2301
__bpf_trace_sched_switch+0x145/0x190 include/trace/events/sched.h:220
__traceiter_sched_switch+0x6f/0xc0 include/trace/events/sched.h:220
__do_trace_sched_switch include/trace/events/sched.h:220 [inline]
trace_sched_switch include/trace/events/sched.h:220 [inline]
__schedule+0x1bee/0x5dd0 kernel/sched/core.c:6783
preempt_schedule_irq+0x51/0x90 kernel/sched/core.c:7109
irqentry_exit+0x36/0x90 kernel/entry/common.c:307
asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702
RIP: 0010:page_counter_cancel+0x0/0x170 mm/page_counter.c:55
Code: ff e9 bc fe ff ff e8 9f ec f8 ff e9 2d ff ff ff e8 95 ec f8 ff eb 9a 0f 1f 00 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 <66> 0f 1f 00 41 55 41 54 49 89 f4 55 53 48 89 fb e8 8b 98 93 ff be
RSP: 0018:ffffc90003c4f8a0 EFLAGS: 00000293
RAX: 0000000000000000 RBX: ffff888077fb1680 RCX: 0000000000000000
RDX: ffff88807dbb0000 RSI: 0000000000000002 RDI: ffff888077fb1680
RBP: 0000000000000002 R08: 0000000000000000 R09: fffffbfff215284a
R10: ffffffff90a94257 R11: 0000000000000001 R12: dffffc0000000000
R13: ffff88814040a500 R14: 0000000000000000 R15: ffffc90003c4f980
page_counter_uncharge+0x32/0x70 mm/page_counter.c:184
obj_cgroup_uncharge_pages+0x31/0x1e0 mm/memcontrol.c:2778
__memcg_slab_free_hook+0x2db/0x5d0 mm/memcontrol.c:3217
memcg_slab_free_hook mm/slub.c:2206 [inline]
slab_free mm/slub.c:4640 [inline]
kmem_cache_free+0x37e/0x4d0 mm/slub.c:4745
put_task_struct include/linux/sched/task.h:145 [inline]
put_task_struct include/linux/sched/task.h:132 [inline]
css_task_iter_end+0x2d9/0x380 kernel/cgroup/cgroup.c:5092
__cgroup_procs_start+0x231/0x2e0 kernel/cgroup/cgroup.c:5132
kernfs_seq_start+0xdb/0x240 fs/kernfs/file.c:160
seq_read_iter+0x2c1/0x12c0 fs/seq_file.c:225
kernfs_fop_read_iter+0x40f/0x5a0 fs/kernfs/file.c:279
do_iter_readv_writev+0x738/0x950 fs/read_write.c:825
vfs_readv+0x4cb/0x8b0 fs/read_write.c:1018
do_readv+0x132/0x340 fs/read_write.c:1080
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0xcd/0x4c0 arch/x86/entry/syscall_64.c:94
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fe46458e9a9
Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 a8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007fe465404038 EFLAGS: 00000246 ORIG_RAX: 0000000000000013
RAX: ffffffffffffffda RBX: 00007fe4647b6080 RCX: 00007fe46458e9a9
RDX: 0000000000000001 RSI: 0000200000000340 RDI: 0000000000000004
RBP: 00007fe465404090 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000001
R13: 0000000000000001 R14: 00007fe4647b6080 R15: 00007ffe05027898
----------------
Code disassembly (best guess), 1 bytes skipped:
0: e9 bc fe ff ff jmp 0xfffffec1
5: e8 9f ec f8 ff call 0xfff8eca9
a: e9 2d ff ff ff jmp 0xffffff3c
f: e8 95 ec f8 ff call 0xfff8eca9
14: eb 9a jmp 0xffffffb0
16: 0f 1f 00 nopl (%rax)
19: 90 nop
1a: 90 nop
1b: 90 nop
1c: 90 nop
1d: 90 nop
1e: 90 nop
1f: 90 nop
20: 90 nop
21: 90 nop
22: 90 nop
23: 90 nop
24: 90 nop
25: 90 nop
26: 90 nop
27: 90 nop
28: 90 nop
* 29: 66 0f 1f 00 nopw (%rax) <-- trapping instruction
2d: 41 55 push %r13
2f: 41 54 push %r12
31: 49 89 f4 mov %rsi,%r12
34: 55 push %rbp
35: 53 push %rbx
36: 48 89 fb mov %rdi,%rbx
39: e8 8b 98 93 ff call 0xff9398c9
3e: be .byte 0xbe