rcu: INFO: rcu_preempt detected stalls on CPUs/tasks: rcu: Tasks blocked on level-0 rcu_node (CPUs 0-1): (detected by 0, t=10502 jiffies, g=35109, q=239) rcu: All QSes seen, last rcu_preempt kthread activity 10500 (4294982417-4294971917), jiffies_till_next_fqs=1, root ->qsmask 0x0 rcu: rcu_preempt kthread starved for 10500 jiffies! g35109 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:28872 pid: 14 ppid: 2 flags:0x00004000 Call Trace: context_switch kernel/sched/core.c:4322 [inline] __schedule+0x911/0x21b0 kernel/sched/core.c:5073 schedule+0xcf/0x270 kernel/sched/core.c:5152 schedule_timeout+0x14a/0x250 kernel/time/timer.c:1892 rcu_gp_fqs_loop kernel/rcu/tree.c:2005 [inline] rcu_gp_kthread+0xd07/0x2250 kernel/rcu/tree.c:2178 kthread+0x3b1/0x4a0 kernel/kthread.c:292 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:294 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: 16266 Comm: syz-executor.3 Not tainted 5.12.0-rc7-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:kasan_check_range+0x15/0x180 mm/kasan/generic.c:185 Code: 2e 02 0f 1f 00 48 89 f2 be f8 00 00 00 e9 c3 e7 2e 02 0f 1f 00 48 85 f6 0f 84 70 01 00 00 49 89 f9 41 54 44 0f b6 c2 49 01 f1 <55> 53 0f 82 18 01 00 00 48 b8 ff ff ff ff ff 7f ff ff 48 39 c7 0f RSP: 0018:ffffc90000dc0628 EFLAGS: 00000082 RAX: 0000000000000024 RBX: 1ffff920001b80ce RCX: ffffffff815924af RDX: 0000000000000000 RSI: 0000000000000008 RDI: ffffffff8fa9a9c0 RBP: 0000000000000002 R08: 0000000000000000 R09: ffffffff8fa9a9c8 R10: fffffbfff1f53514 R11: 0000000000000000 R12: 0000000000000001 R13: ffff88807ee42720 R14: 0000000000000925 R15: ffff88807ee42740 FS: 00007fcac6268700(0000) GS:ffff8880b9d00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00000000014a53ad CR3: 000000001b160000 CR4: 0000000000350ee0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000600 Call Trace: instrument_atomic_read include/linux/instrumented.h:71 [inline] test_bit include/asm-generic/bitops/instrumented-non-atomic.h:134 [inline] hlock_class kernel/locking/lockdep.c:198 [inline] mark_lock+0xef/0x17b0 kernel/locking/lockdep.c:4457 mark_usage kernel/locking/lockdep.c:4362 [inline] __lock_acquire+0x1485/0x54c0 kernel/locking/lockdep.c:4855 lock_acquire kernel/locking/lockdep.c:5511 [inline] lock_acquire+0x1ab/0x740 kernel/locking/lockdep.c:5476 __raw_read_lock include/linux/rwlock_api_smp.h:149 [inline] _raw_read_lock+0x36/0x70 kernel/locking/spinlock.c:223 kill_fasync_rcu fs/fcntl.c:1012 [inline] kill_fasync fs/fcntl.c:1033 [inline] kill_fasync+0x14b/0x460 fs/fcntl.c:1026 perf_event_wakeup kernel/events/core.c:6299 [inline] perf_pending_event+0x221/0x310 kernel/events/core.c:6355 irq_work_single+0x120/0x1f0 kernel/irq_work.c:153 irq_work_run_list+0x91/0xc0 kernel/irq_work.c:175 irq_work_run+0x54/0xd0 kernel/irq_work.c:184 __sysvec_irq_work+0x95/0x3d0 arch/x86/kernel/irq_work.c:22 sysvec_irq_work+0x40/0xc0 arch/x86/kernel/irq_work.c:17 asm_sysvec_irq_work+0x12/0x20 arch/x86/include/asm/idtentry.h:658 RIP: 0010:write_comp_data kernel/kcov.c:218 [inline] RIP: 0010:__sanitizer_cov_trace_const_cmp4+0x3/0x70 kernel/kcov.c:284 Code: 83 c2 01 48 c7 44 30 e0 03 00 00 00 48 89 7c 30 e8 48 89 4c 30 f0 4c 89 54 d8 20 48 89 10 5b c3 0f 1f 80 00 00 00 00 41 89 f8 03 00 00 00 4c 8b 14 24 89 f1 65 48 8b 34 25 00 f0 01 00 e8 f4 RSP: 0018:ffffc90000dc0b78 EFLAGS: 00000246 RAX: 0000000000000000 RBX: ffff888013721e18 RCX: 0000000000000100 RDX: 1ffff110026e43c3 RSI: 0000000000000001 RDI: 0000000000000003 RBP: 0000000000000001 R08: 0000000000000003 R09: ffffc90000dc0cc8 R10: fffff520001b8199 R11: 0000000000000000 R12: 0000000000000000 R13: ffff888026508d00 R14: 0000000000000000 R15: ffffc90000dc0cc8 __ieee80211_beacon_get+0x201/0x1aa0 net/mac80211/tx.c:4754 ieee80211_beacon_get_tim+0x88/0x910 net/mac80211/tx.c:4928 ieee80211_beacon_get include/net/mac80211.h:4934 [inline] mac80211_hwsim_beacon_tx+0x111/0x910 drivers/net/wireless/mac80211_hwsim.c:1799 __iterate_interfaces+0x1e5/0x520 net/mac80211/util.c:793 ieee80211_iterate_active_interfaces_atomic+0x8d/0x170 net/mac80211/util.c:829 mac80211_hwsim_beacon+0xd5/0x1a0 drivers/net/wireless/mac80211_hwsim.c:1852 __run_hrtimer kernel/time/hrtimer.c:1537 [inline] __hrtimer_run_queues+0x609/0xe40 kernel/time/hrtimer.c:1601 hrtimer_run_softirq+0x17b/0x360 kernel/time/hrtimer.c:1618 __do_softirq+0x29b/0x9f6 kernel/softirq.c:345 invoke_softirq kernel/softirq.c:221 [inline] __irq_exit_rcu kernel/softirq.c:422 [inline] irq_exit_rcu+0x134/0x200 kernel/softirq.c:434 sysvec_apic_timer_interrupt+0x93/0xc0 arch/x86/kernel/apic/apic.c:1100 asm_sysvec_apic_timer_interrupt+0x12/0x20 arch/x86/include/asm/idtentry.h:632 RIP: 0010:lock_acquire+0x1ef/0x740 kernel/locking/lockdep.c:5479 Code: 50 a8 7e 83 f8 01 0f 85 ee 03 00 00 9c 58 f6 c4 02 0f 85 d9 03 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:ffffc9000a5074e0 EFLAGS: 00000206 RAX: dffffc0000000000 RBX: 1ffff920014a0e9e RCX: ffffffff81595703 RDX: 1ffff1100fdc84c5 RSI: 0000000000000002 RDI: 0000000000000000 RBP: 0000000000000001 R08: 0000000000000000 R09: ffffffff8fa9a8a7 R10: fffffbfff1f53514 R11: 0000000000000000 R12: 0000000000000000 R13: ffffffff8c094820 R14: 0000000000000000 R15: 0000000000000000 __raw_spin_lock include/linux/spinlock_api_smp.h:142 [inline] _raw_spin_lock+0x2a/0x40 kernel/locking/spinlock.c:151 spin_lock include/linux/spinlock.h:354 [inline] kasan_depopulate_vmalloc_pte+0x42/0x70 mm/kasan/shadow.c:365 apply_to_pte_range mm/memory.c:2414 [inline] apply_to_pmd_range mm/memory.c:2450 [inline] apply_to_pud_range mm/memory.c:2478 [inline] apply_to_p4d_range mm/memory.c:2506 [inline] __apply_to_page_range+0x645/0xdf0 mm/memory.c:2533 kasan_release_vmalloc+0xa7/0xc0 mm/kasan/shadow.c:479 __purge_vmap_area_lazy+0x8f9/0x1c50 mm/vmalloc.c:1381 _vm_unmap_aliases.part.0+0x3d6/0x4e0 mm/vmalloc.c:1784 _vm_unmap_aliases mm/vmalloc.c:1758 [inline] vm_unmap_aliases+0x47/0x50 mm/vmalloc.c:1807 change_page_attr_set_clr+0x241/0x500 arch/x86/mm/pat/set_memory.c:1732 change_page_attr_clear arch/x86/mm/pat/set_memory.c:1789 [inline] set_memory_ro+0x78/0xa0 arch/x86/mm/pat/set_memory.c:1935 bpf_jit_binary_lock_ro include/linux/filter.h:851 [inline] bpf_int_jit_compile+0xe11/0x11b0 arch/x86/net/bpf_jit_comp.c:2329 bpf_prog_select_runtime+0x576/0x9f0 kernel/bpf/core.c:1868 bpf_prog_load+0xe75/0x1f40 kernel/bpf/syscall.c:2218 __do_sys_bpf+0x1272/0x4f40 kernel/bpf/syscall.c:4393 do_syscall_64+0x2d/0x70 arch/x86/entry/common.c:46 entry_SYSCALL_64_after_hwframe+0x44/0xae RIP: 0033:0x466459 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 bc ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007fcac6268188 EFLAGS: 00000246 ORIG_RAX: 0000000000000141 RAX: ffffffffffffffda RBX: 000000000056bf60 RCX: 0000000000466459 RDX: 0000000000000048 RSI: 00000000200054c0 RDI: 0000000000000005 RBP: 00000000004bf9fb R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 000000000056bf60 R13: 00007ffe17eadb1f R14: 00007fcac6268300 R15: 0000000000022000