rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: 	0-...!: (7 ticks this GP) idle=b59c/1/0x4000000000000000 softirq=20458/20459 fqs=3
rcu: 	(detected by 1, t=10502 jiffies, g=12173, q=545 ncpus=2)
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 UID: 0 PID: 6967 Comm: syz.1.306 Not tainted syzkaller #0 PREEMPT(full) 
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.2-debian-1.16.2-1 04/01/2014
RIP: 0010:hrtimer_try_to_cancel+0x41/0x420
Code: 00 00 00 00 00 fc ff df e8 dc 1b 12 00 48 8d 4b 38 48 89 5c 24 18 48 83 c3 30 48 89 d8 48 c1 e8 03 48 89 44 24 10 48 89 0c 24 <48> c1 e9 03 48 89 4c 24 28 48 89 5c 24 08 eb 0a e8 aa 1b 12 00 48
RSP: 0018:ffffc90000006f28 EFLAGS: 00000802
RAX: 1ffff110060facb3 RBX: ffff8880307d6598 RCX: ffff8880307d65a0
RDX: 0000000000010100 RSI: 0000000000000004 RDI: ffff8880307d6568
RBP: 00000000ffffffff R08: ffff88804b027a83 R09: 1ffff11009604f50
R10: dffffc0000000000 R11: ffffed1009604f51 R12: ffff8880307d6610
R13: dffffc0000000000 R14: dffffc0000000000 R15: fffffffffffef283
FS:  00007f96dadf66c0(0000) GS:ffff8880b8611000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000001b3481dff8 CR3: 000000001f2dc000 CR4: 00000000000006f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000600
Call Trace:
 <IRQ>
 hrtimer_cancel+0x3b/0x50
 cpu_clock_event_stop+0xd9/0x130
 __perf_event_overflow+0x580/0xe40
 perf_swevent_hrtimer+0x3c5/0x550
 __hrtimer_run_queues+0x4e0/0xc60
 hrtimer_interrupt+0x45b/0xaa0
 __sysvec_apic_timer_interrupt+0x10b/0x410
 sysvec_apic_timer_interrupt+0x52/0xc0
 asm_sysvec_apic_timer_interrupt+0x1a/0x20
RIP: 0010:unwind_next_frame+0x132f/0x2390
Code: 00 00 fc ff df 0f b6 04 08 84 c0 75 27 49 63 07 4c 01 f8 49 8d 4f 04 4c 39 e0 48 0f 46 e9 49 8d 47 fc 48 0f 47 d8 4d 0f 46 ef <48> 39 dd 76 a2 e9 7b ef ff ff 44 89 f9 80 e1 07 80 c1 03 38 c1 7c
RSP: 0018:ffffc900000076d8 EFLAGS: 00000297
RAX: ffffffff90112994 RBX: ffffffff90112998 RCX: ffffffff9011299c
RDX: ffffffff90112998 RSI: ffffffff90ba0290 RDI: ffffffff8be34420
RBP: ffffffff9011299c R08: 0000000000000001 R09: ffffffff8172d195
R10: ffffc900000077f8 R11: ffffffff81ac5140 R12: ffffffff8958b3b2
R13: ffffffff90112998 R14: ffffc900000077a8 R15: ffffffff90112998
 arch_stack_walk+0x11c/0x150
 stack_trace_save+0x9c/0xe0
 kasan_save_track+0x3e/0x80
 kasan_save_free_info+0x46/0x50
 __kasan_slab_free+0x5b/0x80
 kfree+0x18e/0x440
 slab_free_after_rcu_debug+0x60/0x2a0
 rcu_core+0xcab/0x1770
 handle_softirqs+0x286/0x870
 __irq_exit_rcu+0xca/0x1f0
 irq_exit_rcu+0x9/0x30
 sysvec_apic_timer_interrupt+0xa6/0xc0
 </IRQ>
 <TASK>
 asm_sysvec_apic_timer_interrupt+0x1a/0x20
RIP: 0010:rcu_is_watching+0x10/0xb0
Code: 66 2e 0f 1f 84 00 00 00 00 00 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 f3 0f 1e fa 41 57 41 56 53 65 ff 05 f0 79 fa 10 <e8> db ba d4 09 89 c3 83 f8 08 73 65 49 bf 00 00 00 00 00 fc ff df
RSP: 0018:ffffc90002cefa90 EFLAGS: 00000283
RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000000
RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffffffff8e240780
RBP: ffffffff821910a1 R08: 0000000000000001 R09: 0000000000000000
R10: dffffc0000000000 R11: ffffed102271993e R12: 0000000000000000
R13: ffffffff8e240780 R14: 0000000000000000 R15: 0000000000000001
 lock_acquire+0x5f/0x360
 fs_reclaim_acquire+0x72/0x100
 __kmalloc_cache_noprof+0x41/0x3d0
 ref_tracker_alloc+0x133/0x460
 sk_alloc+0x1b1/0x370
 __netlink_create+0x65/0x260
 netlink_create+0x3ca/0x590
 __sock_create+0x4b3/0x9f0
 __sys_socket+0xd7/0x1b0
 __x64_sys_socket+0x7a/0x90
 do_syscall_64+0xfa/0x3b0
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f96dcb8ec29
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:00007f96dadf6038 EFLAGS: 00000246 ORIG_RAX: 0000000000000029
RAX: ffffffffffffffda RBX: 00007f96dcdd5fa0 RCX: 00007f96dcb8ec29
RDX: 0000000000000000 RSI: 0000000000000002 RDI: 0000000000000010
RBP: 00007f96dcc11e41 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f96dcdd6038 R14: 00007f96dcdd5fa0 R15: 00007ffe7231a788
 </TASK>
rcu: rcu_preempt kthread starved for 10496 jiffies! g12173 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:27224 pid:16    tgid:16    ppid:2      task_flags:0x208040 flags:0x00004000
Call Trace:
 <TASK>
 __schedule+0x1798/0x4cc0
 schedule+0x165/0x360
 schedule_timeout+0x12b/0x270
 rcu_gp_fqs_loop+0x301/0x1540
 rcu_gp_kthread+0x99/0x390
 kthread+0x711/0x8a0
 ret_from_fork+0x439/0x7d0
 ret_from_fork_asm+0x1a/0x30
 </TASK>
rcu: Stack dump where RCU GP kthread last ran:
CPU: 1 UID: 0 PID: 6972 Comm: syz.1.306 Not tainted syzkaller #0 PREEMPT(full) 
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.2-debian-1.16.2-1 04/01/2014
RIP: 0010:smp_call_function_many_cond+0xd33/0x12d0
Code: 45 8b 2c 24 44 89 ee 83 e6 01 31 ff e8 b6 63 0b 00 41 83 e5 01 49 bd 00 00 00 00 00 fc ff df 75 07 e8 61 5f 0b 00 eb 38 f3 90 <42> 0f b6 04 2b 84 c0 75 11 41 f7 04 24 01 00 00 00 74 1e e8 45 5f
RSP: 0018:ffffc9000327f420 EFLAGS: 00000246
RAX: ffffffff81b4665b RBX: 1ffff11009608341 RCX: 0000000000080000
RDX: ffffc900071da000 RSI: 000000000007ffff RDI: 0000000000080000
RBP: ffffc9000327f5a0 R08: ffffffff8fa3b537 R09: 1ffffffff1f476a6
R10: dffffc0000000000 R11: fffffbfff1f476a7 R12: ffff88804b041a08
R13: dffffc0000000000 R14: ffff88813663b1c0 R15: 0000000000000000
FS:  00007f96dadd56c0(0000) GS:ffff8881a3c11000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000001b3481aff8 CR3: 000000001f2dc000 CR4: 00000000000006f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000600
Call Trace:
 <TASK>
 on_each_cpu_cond_mask+0x3f/0x80
 smp_text_poke_batch_finish+0x5f9/0x1130
 __static_call_transform+0x4eb/0x750
 arch_static_call_transform+0x98/0xc0
 __static_call_update+0xe4/0x5d0
 tracepoint_add_func+0x91e/0xa10
 tracepoint_probe_register+0x5d/0x90
 perf_trace_event_init+0x4e1/0x9d0
 perf_trace_init+0x23d/0x2d0
 perf_tp_event_init+0x8d/0x120
 perf_try_init_event+0x17f/0x870
 perf_event_alloc+0x133e/0x2be0
 __se_sys_perf_event_open+0x772/0x1d70
 do_syscall_64+0xfa/0x3b0
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f96dcb8ec29
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:00007f96dadd5038 EFLAGS: 00000246 ORIG_RAX: 000000000000012a
RAX: ffffffffffffffda RBX: 00007f96dcdd6090 RCX: 00007f96dcb8ec29
RDX: ffffffffffffffff RSI: 0000000000000000 RDI: 0000200000000180
RBP: 00007f96dcc11e41 R08: 000000000000000a R09: 0000000000000000
R10: ffffffffffffffff R11: 0000000000000246 R12: 0000000000000000
R13: 00007f96dcdd6128 R14: 00007f96dcdd6090 R15: 00007ffe7231a788
 </TASK>
