rcu: INFO: rcu_preempt self-detected stall on CPU
rcu: 0-...!: (1 GPs behind) idle=a67/1/0x4000000000000000 softirq=18710/18711 fqs=0
(t=10500 jiffies g=25325 q=286)
rcu: rcu_preempt kthread starved for 10500 jiffies! g25325 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x0 ->cpu=1
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:28696 pid: 14 ppid: 2 flags:0x00004000
Call Trace:
context_switch kernel/sched/core.c:4969 [inline]
__schedule+0xa9a/0x4940 kernel/sched/core.c:6250
schedule+0xd2/0x260 kernel/sched/core.c:6323
schedule_timeout+0x14a/0x2a0 kernel/time/timer.c:1881
rcu_gp_fqs_loop+0x186/0x810 kernel/rcu/tree.c:1955
rcu_gp_kthread+0x1de/0x320 kernel/rcu/tree.c:2128
kthread+0x405/0x4f0 kernel/kthread.c:327
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295
rcu: Stack dump where RCU GP kthread last ran:
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 PID: 8464 Comm: kworker/1:6 Not tainted 5.15.0-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Workqueue: events prog_array_map_clear_deferred
RIP: 0010:mark_lock+0x90/0x17b0 kernel/locking/lockdep.c:4562
Code: 40 14 f3 f3 f3 f3 65 48 8b 04 25 28 00 00 00 48 89 84 24 10 01 00 00 31 c0 41 83 fc 09 0f 87 3f 01 00 00 41 83 fc 08 49 89 f5 <0f> 84 f6 00 00 00 bd 01 00 00 00 44 89 e1 d3 e5 48 63 ed 4d 8d 7d
RSP: 0018:ffffc900171af760 EFLAGS: 00000093
RAX: 0000000000000000 RBX: 1ffff92002e35ef3 RCX: 1ffffffff1fb324e
RDX: dffffc0000000000 RSI: ffff88806cca61b0 RDI: ffff88806cca5700
RBP: ffff88806cca61d2 R08: 0000000000000000 R09: ffffffff8fd39aff
R10: 0000000000000001 R11: 0000000000000000 R12: 0000000000000006
R13: ffff88806cca61b0 R14: ffff88806cca6160 R15: dffffc0000000000
FS: 0000000000000000(0000) GS:ffff8880b9d00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f381d992cc8 CR3: 000000000b68e000 CR4: 00000000003506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
mark_usage kernel/locking/lockdep.c:4506 [inline]
__lock_acquire+0x88f/0x54a0 kernel/locking/lockdep.c:4969
lock_acquire kernel/locking/lockdep.c:5625 [inline]
lock_acquire+0x1ab/0x510 kernel/locking/lockdep.c:5590
__mutex_lock_common kernel/locking/mutex.c:607 [inline]
__mutex_lock+0x12f/0x12f0 kernel/locking/mutex.c:740
fd_array_map_delete_elem+0x120/0x2e0 kernel/bpf/arraymap.c:821
bpf_fd_array_map_clear kernel/bpf/arraymap.c:871 [inline]
prog_array_map_clear_deferred+0x10b/0x1b0 kernel/bpf/arraymap.c:1050
process_one_work+0x9b2/0x1690 kernel/workqueue.c:2297
worker_thread+0x658/0x11f0 kernel/workqueue.c:2444
kthread+0x405/0x4f0 kernel/kthread.c:327
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295
NMI backtrace for cpu 0
CPU: 0 PID: 7 Comm: kworker/0:1 Not tainted 5.15.0-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Workqueue: events prog_array_map_clear_deferred
Call Trace:
__dump_stack lib/dump_stack.c:88 [inline]
dump_stack_lvl+0xcd/0x134 lib/dump_stack.c:106
nmi_cpu_backtrace.cold+0x47/0x144 lib/nmi_backtrace.c:105
nmi_trigger_cpumask_backtrace+0x1ae/0x220 lib/nmi_backtrace.c:62
trigger_single_cpu_backtrace include/linux/nmi.h:164 [inline]
rcu_dump_cpu_stacks+0x25e/0x3f0 kernel/rcu/tree_stall.h:343
print_cpu_stall kernel/rcu/tree_stall.h:627 [inline]
check_cpu_stall kernel/rcu/tree_stall.h:711 [inline]
rcu_pending kernel/rcu/tree.c:3878 [inline]
rcu_sched_clock_irq.cold+0x9d/0x746 kernel/rcu/tree.c:2597
update_process_times+0x16d/0x200 kernel/time/timer.c:1785
tick_sched_handle+0x9b/0x180 kernel/time/tick-sched.c:226
tick_sched_timer+0x1b0/0x2d0 kernel/time/tick-sched.c:1421
__run_hrtimer kernel/time/hrtimer.c:1685 [inline]
__hrtimer_run_queues+0x1c0/0xe50 kernel/time/hrtimer.c:1749
hrtimer_interrupt+0x31c/0x790 kernel/time/hrtimer.c:1811
local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1086 [inline]
__sysvec_apic_timer_interrupt+0x146/0x530 arch/x86/kernel/apic/apic.c:1103
sysvec_apic_timer_interrupt+0x8e/0xc0 arch/x86/kernel/apic/apic.c:1097
asm_sysvec_apic_timer_interrupt+0x12/0x20 arch/x86/include/asm/idtentry.h:638
RIP: 0010:lock_acquire+0x1ef/0x510 kernel/locking/lockdep.c:5593
Code: d6 a5 7e 83 f8 01 0f 85 b4 02 00 00 9c 58 f6 c4 02 0f 85 9f 02 00 00 48 83 7c 24 08 00 74 01 fb 48 b8 00 00 00 00 00 fc ff df <48> 01 c3 48 c7 03 00 00 00 00 48 c7 43 08 00 00 00 00 48 8b 84 24
RSP: 0018:ffffc90000cc79f0 EFLAGS: 00000206
RAX: dffffc0000000000 RBX: 1ffff92000198f40 RCX: ffffffff815c50df
RDX: 1ffff110021cd88b RSI: 0000000000000001 RDI: 0000000000000000
RBP: 0000000000000001 R08: 0000000000000000 R09: ffffffff8fd39aff
R10: fffffbfff1fa735f R11: 0000000000000000 R12: 0000000000000000
R13: 0000000000000000 R14: ffff88807d8978c8 R15: 0000000000000000
__mutex_lock_common kernel/locking/mutex.c:607 [inline]
__mutex_lock+0x12f/0x12f0 kernel/locking/mutex.c:740
fd_array_map_delete_elem+0x120/0x2e0 kernel/bpf/arraymap.c:821
bpf_fd_array_map_clear kernel/bpf/arraymap.c:871 [inline]
prog_array_map_clear_deferred+0x10b/0x1b0 kernel/bpf/arraymap.c:1050
process_one_work+0x9b2/0x1690 kernel/workqueue.c:2297
worker_thread+0x658/0x11f0 kernel/workqueue.c:2444
kthread+0x405/0x4f0 kernel/kthread.c:327
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295
----------------
Code disassembly (best guess):
0: 40 14 f3 adc $0xf3,%al
3: f3 f3 f3 65 48 8b 04 repz repz repz mov %gs:0x28,%rax
a: 25 28 00 00 00
f: 48 89 84 24 10 01 00 mov %rax,0x110(%rsp)
16: 00
17: 31 c0 xor %eax,%eax
19: 41 83 fc 09 cmp $0x9,%r12d
1d: 0f 87 3f 01 00 00 ja 0x162
23: 41 83 fc 08 cmp $0x8,%r12d
27: 49 89 f5 mov %rsi,%r13
* 2a: 0f 84 f6 00 00 00 je 0x126 <-- trapping instruction
30: bd 01 00 00 00 mov $0x1,%ebp
35: 44 89 e1 mov %r12d,%ecx
38: d3 e5 shl %cl,%ebp
3a: 48 63 ed movslq %ebp,%rbp
3d: 4d rex.WRB
3e: 8d .byte 0x8d
3f: 7d .byte 0x7d