[v5.15] INFO: rcu detected stall in sys_openat

[syzbot]

Hello,

syzbot found the following issue on:

HEAD commit: 471e639e59d1 Linux 5.15.117
git tree: linux-5.15.y
console output: https://syzkaller.appspot.com/x/log.txt?x=12264737280000
kernel config: https://syzkaller.appspot.com/x/.config?x=6390289bcc1381aa
dashboard link: https://syzkaller.appspot.com/bug?extid=a954abaa6fe5e4fd2e60
compiler: Debian clang version 15.0.7, GNU ld (GNU Binutils for Debian) 2.35.2

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

Downloadable assets:
disk image: https://storage.googleapis.com/syzbot-assets/145b7f137d72/disk-471e639e.raw.xz
vmlinux: https://storage.googleapis.com/syzbot-assets/b5bd2fcb945c/vmlinux-471e639e.xz
kernel image: https://storage.googleapis.com/syzbot-assets/794584032e0f/bzImage-471e639e.xz

IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+a954ab...@syzkaller.appspotmail.com

rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: Tasks blocked on level-0 rcu_node (CPUs 0-1): P24346/1:b..l P24354/1:b..l
(detected by 0, t=10502 jiffies, g=145057, q=116)
task:syz-executor.1 state:R running task stack:27544 pid:24354 ppid: 19169 flags:0x00004000
Call Trace:
<TASK>
context_switch kernel/sched/core.c:5026 [inline]
__schedule+0x12c4/0x4590 kernel/sched/core.c:6372
preempt_schedule_notrace+0xf8/0x140 kernel/sched/core.c:6627
preempt_schedule_notrace_thunk+0x16/0x18 arch/x86/entry/thunk_64.S:35
rcu_is_watching+0x72/0xa0 kernel/rcu/tree.c:1123
trace_lock_release include/trace/events/lock.h:58 [inline]
lock_release+0xb9/0x9a0 kernel/locking/lockdep.c:5633
rcu_read_unlock include/linux/rcupdate.h:729 [inline]
percpu_ref_tryget_many include/linux/percpu-refcount.h:250 [inline]
percpu_ref_tryget+0xcd/0x140 include/linux/percpu-refcount.h:266
css_tryget include/linux/cgroup.h:355 [inline]
get_mem_cgroup_from_objcg+0xa3/0x120 mm/memcontrol.c:2812
obj_cgroup_charge_pages+0x99/0x1d0 mm/memcontrol.c:3012
obj_cgroup_charge+0x19e/0x390 mm/memcontrol.c:3295
memcg_slab_pre_alloc_hook mm/slab.h:287 [inline]
slab_pre_alloc_hook+0xa6/0xc0 mm/slab.h:497
slab_alloc_node mm/slub.c:3134 [inline]
slab_alloc mm/slub.c:3228 [inline]
kmem_cache_alloc+0x3f/0x280 mm/slub.c:3233
ext4_alloc_inode+0x1d/0x590 fs/ext4/super.c:1288
alloc_inode fs/inode.c:236 [inline]
new_inode_pseudo+0x60/0x210 fs/inode.c:937
new_inode+0x25/0x1d0 fs/inode.c:966
__ext4_new_inode+0x35c/0x4430 fs/ext4/ialloc.c:960
ext4_symlink+0x4ac/0xe60 fs/ext4/namei.c:3377
vfs_symlink+0x2ad/0x490 fs/namei.c:4358
do_symlinkat+0x1fd/0x600 fs/namei.c:4387
__do_sys_symlinkat fs/namei.c:4404 [inline]
__se_sys_symlinkat fs/namei.c:4401 [inline]
__x64_sys_symlinkat+0x95/0xa0 fs/namei.c:4401
do_syscall_x64 arch/x86/entry/common.c:50 [inline]
do_syscall_64+0x3d/0xb0 arch/x86/entry/common.c:80
entry_SYSCALL_64_after_hwframe+0x61/0xcb
RIP: 0033:0x7fd11c36bbb7
RSP: 002b:00007ffe71a96588 EFLAGS: 00000206 ORIG_RAX: 000000000000010a
RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007fd11c36bbb7
RDX: 00007fd11c3b7555 RSI: 00000000ffffff9c RDI: 00007ffe71a96650
RBP: 0000000000000000 R08: 0000000000000000 R09: 00007ffe71a96420
R10: 00007ffe71a962d7 R11: 0000000000000206 R12: 0000000000000001
R13: 0000000000000000 R14: 0000000000000001 R15: 00007ffe71a96650
</TASK>
task:modprobe state:R running task stack:25944 pid:24346 ppid: 1183 flags:0x00004000
Call Trace:
<TASK>
context_switch kernel/sched/core.c:5026 [inline]
__schedule+0x12c4/0x4590 kernel/sched/core.c:6372
preempt_schedule_irq+0xf7/0x1c0 kernel/sched/core.c:6776
irqentry_exit+0x53/0x80 kernel/entry/common.c:426
asm_sysvec_apic_timer_interrupt+0x16/0x20 arch/x86/include/asm/idtentry.h:638
RIP: 0010:__preempt_count_add kernel/rcu/tree.c:1118 [inline]
RIP: 0010:rcu_is_watching+0x0/0xa0 kernel/rcu/tree.c:1121
Code: 5b 41 5c 41 5d 41 5e 41 5f 5d c3 e8 aa 13 b0 08 41 f7 c4 00 02 00 00 75 b4 eb b3 e8 8a 13 b0 08 66 2e 0f 1f 84 00 00 00 00 00 <41> 57 41 56 53 65 ff 05 bc 9a 97 7e e8 2f 27 b0 08 89 c3 83 f8 08
RSP: 0018:ffffc900034df398 EFLAGS: 00000202
RAX: 0000000000000000 RBX: 0000000000000001 RCX: ffff88809415bb80
RDX: ffff88809415bb80 RSI: 0000000000000001 RDI: 0000000000000000
RBP: 000000000019ba01 R08: ffffffff818c854d R09: fffffbfff1f79621
R10: 0000000000000000 R11: dffffc0000000001 R12: ffff88809415bb80
R13: ffffffff816db390 R14: 00007fa82a12ea46 R15: 1ffff9200069be8d
rcu_read_lock include/linux/rcupdate.h:697 [inline]
is_bpf_text_address+0x36/0x260 kernel/bpf/core.c:717
kernel_text_address kernel/extable.c:151 [inline]
__kernel_text_address+0x94/0x100 kernel/extable.c:105
unwind_get_return_address+0x49/0x80 arch/x86/kernel/unwind_orc.c:323
arch_stack_walk+0xf3/0x140 arch/x86/kernel/stacktrace.c:26
stack_trace_save+0x113/0x1c0 kernel/stacktrace.c:122
kasan_save_stack mm/kasan/common.c:38 [inline]
kasan_set_track mm/kasan/common.c:46 [inline]
set_alloc_info mm/kasan/common.c:434 [inline]
__kasan_slab_alloc+0x8e/0xc0 mm/kasan/common.c:467
kasan_slab_alloc include/linux/kasan.h:254 [inline]
slab_post_alloc_hook+0x53/0x380 mm/slab.h:519
slab_alloc_node mm/slub.c:3220 [inline]
slab_alloc mm/slub.c:3228 [inline]
kmem_cache_alloc+0xf3/0x280 mm/slub.c:3233
kmem_cache_zalloc include/linux/slab.h:711 [inline]
lsm_file_alloc security/security.c:574 [inline]
security_file_alloc+0x24/0x120 security/security.c:1530
__alloc_file+0xc3/0x240 fs/file_table.c:106
alloc_empty_file+0x92/0x180 fs/file_table.c:150
path_openat+0xfc/0x2f20 fs/namei.c:3658
do_filp_open+0x21c/0x460 fs/namei.c:3699
do_sys_openat2+0x13b/0x500 fs/open.c:1211
do_sys_open fs/open.c:1227 [inline]
__do_sys_openat fs/open.c:1243 [inline]
__se_sys_openat fs/open.c:1238 [inline]
__x64_sys_openat+0x243/0x290 fs/open.c:1238
do_syscall_x64 arch/x86/entry/common.c:50 [inline]
do_syscall_64+0x3d/0xb0 arch/x86/entry/common.c:80
entry_SYSCALL_64_after_hwframe+0x61/0xcb
RIP: 0033:0x7fa82a12ea46
RSP: 002b:00007ffeee9d6128 EFLAGS: 00000287 ORIG_RAX: 0000000000000101
RAX: ffffffffffffffda RBX: 00007ffeee9d6388 RCX: 00007fa82a12ea46
RDX: 0000000000080000 RSI: 00007ffeee9d61a0 RDI: 00000000ffffff9c
RBP: 00007ffeee9d6190 R08: 0000000000080000 R09: 00007ffeee9d61a0
R10: 0000000000000000 R11: 0000000000000287 R12: 00007ffeee9d61a0
R13: 0000000000000008 R14: 00007ffeee9d636f R15: 00000000ffffffff
</TASK>
rcu: rcu_preempt kthread starved for 10502 jiffies! g145057 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x0 ->cpu=0
rcu: Unless rcu_preempt kthread gets sufficient CPU time, OOM is now expected behavior.
rcu: RCU grace-period kthread stack dump:
task:rcu_preempt state:R running task stack:27000 pid: 15 ppid: 2 flags:0x00004000
Call Trace:
<TASK>
context_switch kernel/sched/core.c:5026 [inline]
__schedule+0x12c4/0x4590 kernel/sched/core.c:6372
schedule+0x11b/0x1f0 kernel/sched/core.c:6455
schedule_timeout+0x1b9/0x300 kernel/time/timer.c:1884
rcu_gp_fqs_loop+0x2af/0xf70 kernel/rcu/tree.c:1959
rcu_gp_kthread+0xa4/0x360 kernel/rcu/tree.c:2132
kthread+0x3f6/0x4f0 kernel/kthread.c:319
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:298
</TASK>
rcu: Stack dump where RCU GP kthread last ran:
NMI backtrace for cpu 0
CPU: 0 PID: 24350 Comm: syz-executor.3 Not tainted 5.15.117-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/27/2023
Call Trace:
<IRQ>
__dump_stack lib/dump_stack.c:88 [inline]
dump_stack_lvl+0x1e3/0x2cb lib/dump_stack.c:106
nmi_cpu_backtrace+0x46a/0x4a0 lib/nmi_backtrace.c:111
nmi_trigger_cpumask_backtrace+0x181/0x2a0 lib/nmi_backtrace.c:62
trigger_single_cpu_backtrace include/linux/nmi.h:166 [inline]
rcu_check_gp_kthread_starvation+0x1d2/0x240 kernel/rcu/tree_stall.h:481
print_other_cpu_stall+0x137a/0x14d0 kernel/rcu/tree_stall.h:586
check_cpu_stall kernel/rcu/tree_stall.h:729 [inline]
rcu_pending kernel/rcu/tree.c:3888 [inline]
rcu_sched_clock_irq+0x94f/0x1770 kernel/rcu/tree.c:2606
update_process_times+0x196/0x200 kernel/time/timer.c:1788
tick_sched_handle kernel/time/tick-sched.c:226 [inline]
tick_sched_timer+0x22d/0x3c0 kernel/time/tick-sched.c:1430
__run_hrtimer kernel/time/hrtimer.c:1685 [inline]
__hrtimer_run_queues+0x55b/0xcf0 kernel/time/hrtimer.c:1749
hrtimer_interrupt+0x392/0x980 kernel/time/hrtimer.c:1811
local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1085 [inline]
__sysvec_apic_timer_interrupt+0x139/0x470 arch/x86/kernel/apic/apic.c:1102
sysvec_apic_timer_interrupt+0x8c/0xb0 arch/x86/kernel/apic/apic.c:1096
</IRQ>
<TASK>
asm_sysvec_apic_timer_interrupt+0x16/0x20 arch/x86/include/asm/idtentry.h:638
RIP: 0010:csd_lock_wait kernel/smp.c:440 [inline]
RIP: 0010:smp_call_function_many_cond+0xa93/0xd90 kernel/smp.c:969
Code: 04 03 84 c0 0f 85 84 00 00 00 45 8b 7d 00 44 89 fe 83 e6 01 31 ff e8 0c b3 0b 00 41 83 e7 01 75 07 e8 a1 af 0b 00 eb 41 f3 90 <48> b8 00 00 00 00 00 fc ff df 0f b6 04 03 84 c0 75 11 41 f7 45 00
RSP: 0018:ffffc90002fefa00 EFLAGS: 00000293
RAX: ffffffff817449d4 RBX: 1ffff11017367f19 RCX: ffff888076a40000
RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000000
RBP: ffffc90002fefb40 R08: ffffffff817449a4 R09: fffffbfff1f79621
R10: 0000000000000000 R11: dffffc0000000001 R12: 0000000000000001
R13: ffff8880b9b3f8c8 R14: ffff8880b9a3a700 R15: 0000000000000001
on_each_cpu_cond_mask+0x3b/0x80 kernel/smp.c:1135
on_each_cpu include/linux/smp.h:71 [inline]
text_poke_sync arch/x86/kernel/alternative.c:1183 [inline]
text_poke_bp_batch+0x2ad/0x830 arch/x86/kernel/alternative.c:1374
text_poke_flush arch/x86/kernel/alternative.c:1542 [inline]
text_poke_finish+0x16/0x30 arch/x86/kernel/alternative.c:1549
arch_jump_label_transform_apply+0x13/0x20 arch/x86/kernel/jump_label.c:146
static_key_disable_cpuslocked+0xca/0x1b0 kernel/jump_label.c:207
static_key_disable+0x16/0x20 kernel/jump_label.c:215
tracepoint_remove_func kernel/tracepoint.c:417 [inline]
tracepoint_probe_unregister+0x6e6/0x980 kernel/tracepoint.c:551
bpf_raw_tp_link_release+0x5f/0x80 kernel/bpf/syscall.c:2863
bpf_link_free kernel/bpf/syscall.c:2443 [inline]
bpf_link_put+0x234/0x2c0 kernel/bpf/syscall.c:2469
bpf_link_release+0x37/0x40 kernel/bpf/syscall.c:2477
__fput+0x3bf/0x890 fs/file_table.c:280
task_work_run+0x129/0x1a0 kernel/task_work.c:164
tracehook_notify_resume include/linux/tracehook.h:189 [inline]
exit_to_user_mode_loop+0x106/0x130 kernel/entry/common.c:175
exit_to_user_mode_prepare+0xb1/0x140 kernel/entry/common.c:208
__syscall_exit_to_user_mode_work kernel/entry/common.c:290 [inline]
syscall_exit_to_user_mode+0x5d/0x250 kernel/entry/common.c:301
do_syscall_64+0x49/0xb0 arch/x86/entry/common.c:86
entry_SYSCALL_64_after_hwframe+0x61/0xcb
RIP: 0033:0x7f5a43a5f12b
Code: 0f 05 48 3d 00 f0 ff ff 77 45 c3 0f 1f 40 00 48 83 ec 18 89 7c 24 0c e8 63 fc ff ff 8b 7c 24 0c 41 89 c0 b8 03 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 35 44 89 c7 89 44 24 0c e8 a1 fc ff ff 8b 44
RSP: 002b:00007ffea8af3930 EFLAGS: 00000293 ORIG_RAX: 0000000000000003
RAX: 0000000000000000 RBX: 0000000000000005 RCX: 00007f5a43a5f12b
RDX: 00007f5a43621600 RSI: ffffffffffffffff RDI: 0000000000000004
RBP: 00007f5a43bce980 R08: 0000000000000000 R09: 00007f5a43621000
R10: 00007f5a43621608 R11: 0000000000000293 R12: 00000000001b3cbc
R13: 00007ffea8af3a30 R14: 00007f5a43bccf80 R15: 0000000000000032
</TASK>


---
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If the bug is already fixed, let syzbot know by replying with:
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If you want to change bug's subsystems, reply with:
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(See the list of subsystem names on the web dashboard)

If the bug is a duplicate of another bug, reply with:
#syz dup: exact-subject-of-another-report

If you want to undo deduplication, reply with:
#syz undup

[syzbot]

syzbot has found a reproducer for the following issue on:

HEAD commit: d93fa2c78854 Linux 5.15.145
git tree: linux-5.15.y
console output: https://syzkaller.appspot.com/x/log.txt?x=14ab03e9e80000
kernel config: https://syzkaller.appspot.com/x/.config?x=68cb856f08cf8214
dashboard link: https://syzkaller.appspot.com/bug?extid=a954abaa6fe5e4fd2e60
compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40
syz repro: https://syzkaller.appspot.com/x/repro.syz?x=108729e9e80000
C reproducer: https://syzkaller.appspot.com/x/repro.c?x=14ac6179e80000

Downloadable assets:
disk image: https://storage.googleapis.com/syzbot-assets/2fdac32b009c/disk-d93fa2c7.raw.xz
vmlinux: https://storage.googleapis.com/syzbot-assets/5c99dfaee802/vmlinux-d93fa2c7.xz
kernel image: https://storage.googleapis.com/syzbot-assets/52e4895d11f6/bzImage-d93fa2c7.xz

IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+a954ab...@syzkaller.appspotmail.com

rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:

rcu: Tasks blocked on level-0 rcu_node (CPUs 0-1): P3534/1:b..l
(detected by 0, t=10503 jiffies, g=3629, q=22)
task:syz-executor288 state:R running task stack:24984 pid: 3534 ppid: 3526 flags:0x00004002
Call Trace:
<TASK>
context_switch kernel/sched/core.c:5030 [inline]
__schedule+0x12c4/0x45b0 kernel/sched/core.c:6376
preempt_schedule_irq+0xf7/0x1c0 kernel/sched/core.c:6780

irqentry_exit+0x53/0x80 kernel/entry/common.c:426
asm_sysvec_apic_timer_interrupt+0x16/0x20 arch/x86/include/asm/idtentry.h:638

RIP: 0010:lock_acquire+0x252/0x4f0 kernel/locking/lockdep.c:5627
Code: 2b 00 74 08 4c 89 f7 e8 dc 5c 67 00 f6 44 24 61 02 0f 85 84 01 00 00 41 f7 c7 00 02 00 00 74 01 fb 48 c7 44 24 40 0e 36 e0 45 <4b> c7 44 25 00 00 00 00 00 43 c7 44 25 09 00 00 00 00 43 c7 44 25
RSP: 0018:ffffc90002ce7680 EFLAGS: 00000206
RAX: 0000000000000001 RBX: 1ffff9200059cedc RCX: 1ffff9200059ce7c
RDX: dffffc0000000000 RSI: ffffffff8a8b2220 RDI: ffffffff8ad88080
RBP: ffffc90002ce77e0 R08: dffffc0000000000 R09: fffffbfff1f79e19
R10: 0000000000000000 R11: dffffc0000000001 R12: 1ffff9200059ced8
R13: dffffc0000000000 R14: ffffc90002ce76e0 R15: 0000000000000246
rcu_lock_acquire+0x2a/0x30 include/linux/rcupdate.h:269
rcu_read_lock include/linux/rcupdate.h:696 [inline]
is_bpf_text_address+0x1d/0x260 kernel/bpf/core.c:721

kernel_text_address kernel/extable.c:151 [inline]
__kernel_text_address+0x94/0x100 kernel/extable.c:105
unwind_get_return_address+0x49/0x80 arch/x86/kernel/unwind_orc.c:323
arch_stack_walk+0xf3/0x140 arch/x86/kernel/stacktrace.c:26
stack_trace_save+0x113/0x1c0 kernel/stacktrace.c:122
kasan_save_stack mm/kasan/common.c:38 [inline]
kasan_set_track mm/kasan/common.c:46 [inline]
set_alloc_info mm/kasan/common.c:434 [inline]
__kasan_slab_alloc+0x8e/0xc0 mm/kasan/common.c:467
kasan_slab_alloc include/linux/kasan.h:254 [inline]
slab_post_alloc_hook+0x53/0x380 mm/slab.h:519
slab_alloc_node mm/slub.c:3220 [inline]
slab_alloc mm/slub.c:3228 [inline]
kmem_cache_alloc+0xf3/0x280 mm/slub.c:3233

getname_flags+0xb8/0x4e0 fs/namei.c:138
do_sys_openat2+0xd2/0x500 fs/open.c:1205

do_sys_open fs/open.c:1227 [inline]
__do_sys_openat fs/open.c:1243 [inline]
__se_sys_openat fs/open.c:1238 [inline]
__x64_sys_openat+0x243/0x290 fs/open.c:1238
do_syscall_x64 arch/x86/entry/common.c:50 [inline]
do_syscall_64+0x3d/0xb0 arch/x86/entry/common.c:80
entry_SYSCALL_64_after_hwframe+0x61/0xcb

RIP: 0033:0x7f9828cf0de0
RSP: 002b:00007ffeae9cd320 EFLAGS: 00000293 ORIG_RAX: 0000000000000101
RAX: ffffffffffffffda RBX: 0000000000080001 RCX: 00007f9828cf0de0
RDX: 0000000000080001 RSI: 00007f9828d49180 RDI: 00000000ffffff9c
RBP: 00007f9828d49180 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000293 R12: 00007ffeae9cd3c0
R13: 0000000000000002 R14: 00007ffeae9cd900 R15: 00007ffeae9cd8f0
</TASK>
rcu: rcu_preempt kthread starved for 10545 jiffies! g3629 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x0 ->cpu=0

rcu: Unless rcu_preempt kthread gets sufficient CPU time, OOM is now expected behavior.
rcu: RCU grace-period kthread stack dump:
task:rcu_preempt state:R running task stack:27000 pid: 15 ppid: 2 flags:0x00004000
Call Trace:
<TASK>

context_switch kernel/sched/core.c:5030 [inline]
__schedule+0x12c4/0x45b0 kernel/sched/core.c:6376
schedule+0x11b/0x1f0 kernel/sched/core.c:6459
schedule_timeout+0x1b9/0x300 kernel/time/timer.c:1884
rcu_gp_fqs_loop+0x2bf/0x1080 kernel/rcu/tree.c:1972
rcu_gp_kthread+0xa4/0x360 kernel/rcu/tree.c:2145

kthread+0x3f6/0x4f0 kernel/kthread.c:319
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:298
</TASK>
rcu: Stack dump where RCU GP kthread last ran:
NMI backtrace for cpu 0

CPU: 0 PID: 3556 Comm: syz-executor288 Not tainted 5.15.145-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 11/17/2023

Call Trace:
<IRQ>
__dump_stack lib/dump_stack.c:88 [inline]
dump_stack_lvl+0x1e3/0x2cb lib/dump_stack.c:106
nmi_cpu_backtrace+0x46a/0x4a0 lib/nmi_backtrace.c:111
nmi_trigger_cpumask_backtrace+0x181/0x2a0 lib/nmi_backtrace.c:62
trigger_single_cpu_backtrace include/linux/nmi.h:166 [inline]

rcu_check_gp_kthread_starvation+0x1d2/0x240 kernel/rcu/tree_stall.h:487
print_other_cpu_stall+0x137a/0x14d0 kernel/rcu/tree_stall.h:592
check_cpu_stall kernel/rcu/tree_stall.h:745 [inline]
rcu_pending kernel/rcu/tree.c:3932 [inline]
rcu_sched_clock_irq+0xa38/0x1150 kernel/rcu/tree.c:2619
update_process_times+0x196/0x200 kernel/time/timer.c:1788
tick_sched_handle kernel/time/tick-sched.c:254 [inline]
tick_sched_timer+0x386/0x550 kernel/time/tick-sched.c:1473

__run_hrtimer kernel/time/hrtimer.c:1685 [inline]
__hrtimer_run_queues+0x55b/0xcf0 kernel/time/hrtimer.c:1749
hrtimer_interrupt+0x392/0x980 kernel/time/hrtimer.c:1811
local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1085 [inline]
__sysvec_apic_timer_interrupt+0x139/0x470 arch/x86/kernel/apic/apic.c:1102
sysvec_apic_timer_interrupt+0x8c/0xb0 arch/x86/kernel/apic/apic.c:1096
</IRQ>
<TASK>
asm_sysvec_apic_timer_interrupt+0x16/0x20 arch/x86/include/asm/idtentry.h:638

RIP: 0010:__raw_spin_unlock_irq include/linux/spinlock_api_smp.h:169 [inline]
RIP: 0010:_raw_spin_unlock_irq+0x25/0x40 kernel/locking/spinlock.c:202
Code: d1 7e f6 ff 90 53 48 89 fb 48 83 c7 18 48 8b 74 24 08 e8 2e 2a 3d f7 48 89 df e8 06 7e 3e f7 e8 51 28 61 f7 fb bf 01 00 00 00 <e8> 66 ba 31 f7 65 8b 05 d7 f5 dc 75 85 c0 74 02 5b c3 e8 64 0d db
RSP: 0018:ffffc90002d87bc0 EFLAGS: 00000282
RAX: 04f009d321ee4200 RBX: ffff888079354a00 RCX: ffffffff913c6f03
RDX: dffffc0000000000 RSI: ffffffff8a8b0f80 RDI: 0000000000000001
RBP: 0000000000000000 R08: ffffffff8186a260 R09: ffffed100f26a941
R10: 0000000000000000 R11: dffffc0000000001 R12: 0000000000000021
R13: dffffc0000000000 R14: ffff888079354e98 R15: ffff888079354a00
spin_unlock_irq include/linux/spinlock.h:413 [inline]
get_signal+0x13ee/0x14e0 kernel/signal.c:2892
arch_do_signal_or_restart+0xc3/0x1890 arch/x86/kernel/signal.c:867
handle_signal_work kernel/entry/common.c:148 [inline]
exit_to_user_mode_loop+0x97/0x130 kernel/entry/common.c:172

exit_to_user_mode_prepare+0xb1/0x140 kernel/entry/common.c:208
__syscall_exit_to_user_mode_work kernel/entry/common.c:290 [inline]
syscall_exit_to_user_mode+0x5d/0x250 kernel/entry/common.c:301
do_syscall_64+0x49/0xb0 arch/x86/entry/common.c:86
entry_SYSCALL_64_after_hwframe+0x61/0xcb

RIP: 0033:0x7f9828cf1e79
Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 e1 18 00 00 90 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 b0 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007ffeae9cd888 EFLAGS: 00000246
RAX: 0000000000000000 RBX: 0000000000000003 RCX: 00007f9828cf1e79
RDX: 000000002006b000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 00000000000f4240 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000001 R14: 00007ffeae9cd900 R15: 00007ffeae9cd8f0
</TASK>
sched: RT throttling activated


---
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