rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: 	0-...!: (0 ticks this GP) idle=7054/1/0x4000000000000000 softirq=12185/12185 fqs=1
rcu: 	(detected by 1, t=10506 jiffies, g=7901, q=797 ncpus=2)
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 UID: 0 PID: 5911 Comm: syz.2.3 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:__asan_memcpy+0x29/0x70
Code: 90 f3 0f 1e fa 41 57 41 56 41 54 53 48 89 d3 49 89 f6 49 89 ff 4c 8b 64 24 20 48 89 f7 48 89 d6 31 d2 4c 89 e1 e8 97 e3 ff ff <84> c0 74 2c 4c 89 ff 48 89 de ba 01 00 00 00 4c 89 e1 e8 80 e3 ff
RSP: 0018:ffffc900000067d8 EFLAGS: 00000093
RAX: 0000000000000001 RBX: 0000000000000012 RCX: ffffffff819cb957
RDX: 0000000000000000 RSI: 0000000000000012 RDI: ffffffff8bacfa20
RBP: ffffc90000006900 R08: 0000000000000001 R09: 0000000000000003
R10: dffffc0000000000 R11: fffffbfff1759f46 R12: ffffffff819cb957
R13: 0000000000000013 R14: ffffffff8bacfa20 R15: ffffe8ff1465a670
FS:  00007f449aa386c0(0000) GS:ffff8880b83e0000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000000110c27480d CR3: 0000000027aa0000 CR4: 00000000000006f0
Call Trace:
 <IRQ>
 perf_trace_lock_acquire+0x2c7/0x410
 lock_acquire+0x311/0x360
 _raw_spin_lock_irqsave+0xa7/0xf0
 hrtimer_try_to_cancel+0x22b/0x420
 hrtimer_cancel+0x3b/0x50
 cpu_clock_event_stop+0xd9/0x130
 __perf_event_overflow+0x580/0xe40
 perf_swevent_hrtimer+0x3b8/0x500
 __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:__sanitizer_cov_trace_pc+0x11/0x70
Code: 5b e9 63 77 59 00 cc cc cc 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 f3 0f 1e fa 48 8b 04 24 65 48 8b 0c 25 08 00 c4 92 <65> 8b 15 f8 2c 04 11 81 e2 00 01 ff 00 74 11 81 fa 00 01 00 00 75
RSP: 0018:ffffc900000071f8 EFLAGS: 00000246
RAX: ffffffff81ef8b03 RBX: 0000000000000000 RCX: ffff88801ee9d700
RDX: 0000000000000100 RSI: 0000000000000000 RDI: 0000000000000000
RBP: ffffc90000007488 R08: ffffc90000007297 R09: 0000000000000000
R10: ffffc90000007288 R11: fffff52000000e53 R12: 0000000000000000
R13: ffffc90000007288 R14: ffff88804b032af0 R15: dffffc0000000000
 perf_tp_event+0x5f3/0x1380
 perf_trace_run_bpf_submit+0xee/0x170
 perf_trace_lock_acquire+0x335/0x410
 lock_acquire+0x311/0x360
 unwind_next_frame+0xc2/0x2390
 arch_stack_walk+0x11c/0x150
 stack_trace_save+0x9c/0xe0
 kasan_save_track+0x3e/0x80
 __kasan_save_free_info+0x46/0x50
 __kasan_slab_free+0x5c/0x80
 kmem_cache_free+0x19d/0x690
 dst_destroy+0x235/0x350
 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:kasan_check_range+0x4/0x2c0
Code: ff eb ec 90 0f 0b 90 b8 ea ff ff ff eb e1 cc cc cc cc cc cc cc cc 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 0f 1f 40 d6 <55> 41 57 41 56 41 55 41 54 53 b0 01 48 85 f6 0f 84 ba 01 00 00 4c
RSP: 0018:ffffc9000412ed18 EFLAGS: 00000246
RAX: ffffffff81ef85b8 RBX: 0000000000000100 RCX: ffffffff81ef85c7
RDX: 0000000000000001 RSI: 0000000000000100 RDI: ffffc9000412edc0
RBP: 0000000000000000 R08: ffff88804b0329c0 R09: ffffe8ff146563a8
R10: dffffc0000000000 R11: fffff91fe28cacd0 R12: 000000000000002c
R13: ffffe8ff14656658 R14: ffffc9000412edc0 R15: dffffc0000000000
 __asan_memset+0x22/0x50
 perf_tp_event+0xb7/0x1380
 perf_trace_run_bpf_submit+0xee/0x170
 perf_trace_lock_acquire+0x335/0x410
 lock_acquire+0x311/0x360
 unwind_next_frame+0xc2/0x2390
 arch_stack_walk+0x11c/0x150
 stack_trace_save+0x9c/0xe0
 kasan_save_stack+0x3e/0x60
 kasan_record_aux_stack+0xbd/0xd0
 call_rcu+0x157/0x9c0
 kmem_cache_free+0x4b7/0x690
 __fput_deferred+0x227/0x390
 fput_close+0x119/0x200
 path_openat+0x313c/0x3830
 do_filp_open+0x1fa/0x410
 do_sys_openat2+0x121/0x1c0
 __x64_sys_openat+0x138/0x170
 do_syscall_64+0xfa/0xfa0
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f4499b8d510
Code: 48 89 44 24 20 75 93 44 89 54 24 0c e8 49 94 02 00 44 8b 54 24 0c 89 da 48 89 ee 41 89 c0 bf 9c ff ff ff b8 01 01 00 00 0f 05 <48> 3d 00 f0 ff ff 77 38 44 89 c7 89 44 24 0c e8 9c 94 02 00 8b 44
RSP: 002b:00007f449aa37f10 EFLAGS: 00000293 ORIG_RAX: 0000000000000101
RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f4499b8d510
RDX: 0000000000000000 RSI: 00007f449aa37fa0 RDI: 00000000ffffff9c
RBP: 00007f449aa37fa0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000293 R12: 0000000000000000
R13: 00007f4499dd6038 R14: 00007f4499dd5fa0 R15: 00007ffe053e13d8
 </TASK>
rcu: rcu_preempt kthread starved for 10500 jiffies! g7901 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:26856 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+0x4bc/0x870
 ret_from_fork_asm+0x1a/0x30
 </TASK>
rcu: Stack dump where RCU GP kthread last ran:
CPU: 1 UID: 0 PID: 5916 Comm: syz.0.1 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 e6 7f 0b 00 41 83 e5 01 49 bd 00 00 00 00 00 fc ff df 75 07 e8 91 7b 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 75 7b
RSP: 0018:ffffc9000413f580 EFLAGS: 00000293
RAX: ffffffff81b457ab RBX: 1ffff11009608449 RCX: ffff88810e433a00
RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000000
RBP: ffffc9000413f700 R08: ffffffff8fc43c37 R09: 1ffffffff1f88786
R10: dffffc0000000000 R11: fffffbfff1f88787 R12: ffff88804b042248
R13: dffffc0000000000 R14: ffff88813663b240 R15: 0000000000000000
FS:  0000000000000000(0000) GS:ffff8881a39e0000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000000110c297a3e CR3: 000000000e138000 CR4: 00000000000006f0
Call Trace:
 <TASK>
 on_each_cpu_cond_mask+0x3f/0x80
 flush_tlb_mm_range+0x6b1/0x12d0
 tlb_flush_mmu+0x1a7/0x680
 tlb_finish_mmu+0xc3/0x1d0
 free_ldt_pgtables+0x17b/0x320
 exit_mmap+0x174/0xb40
 __mmput+0x118/0x430
 exit_mm+0x1da/0x2c0
 do_exit+0x648/0x2300
 do_group_exit+0x21c/0x2d0
 __x64_sys_exit_group+0x3f/0x40
 x64_sys_call+0x21f7/0x2200
 do_syscall_64+0xfa/0xfa0
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f1b7198eba9
Code: Unable to access opcode bytes at 0x7f1b7198eb7f.
RSP: 002b:00007ffcd8c78b98 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7
RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f1b7198eba9
RDX: 0000000000000064 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 0000000000000003 R08: 00000002d8c78c8f R09: 00007f1b71ba1280
R10: 0000000000000001 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f1b71ba1280 R14: 0000000000000003 R15: 00007ffcd8c78c50
 </TASK>
