rcu: INFO: rcu_preempt self-detected stall on CPU
rcu: 1-...!: (10500 ticks this GP) idle=50b/1/0x4000000000000000 softirq=138379/138379 fqs=1
(t=10502 jiffies g=271053 q=14)
rcu: rcu_preempt kthread starved for 10501 jiffies! g271053 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:4940 [inline]
__schedule+0x940/0x26f0 kernel/sched/core.c:6287
schedule+0xd3/0x270 kernel/sched/core.c:6366
schedule_timeout+0x14a/0x2a0 kernel/time/timer.c:1881
rcu_gp_fqs_loop+0x186/0x800 kernel/rcu/tree.c:1957
rcu_gp_kthread+0x1de/0x320 kernel/rcu/tree.c:2130
kthread+0x3e5/0x4d0 kernel/kthread.c:319
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295
rcu: Stack dump where RCU GP kthread last ran:
NMI backtrace for cpu 1
CPU: 1 PID: 27934 Comm: syz-executor.2 Not tainted 5.15.0-rc2-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
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_check_gp_kthread_starvation.cold+0x1fb/0x200 kernel/rcu/tree_stall.h:481
print_cpu_stall kernel/rcu/tree_stall.h:625 [inline]
check_cpu_stall kernel/rcu/tree_stall.h:711 [inline]
rcu_pending kernel/rcu/tree.c:3880 [inline]
rcu_sched_clock_irq.cold+0x98/0x746 kernel/rcu/tree.c:2599
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+0x40/0xc0 arch/x86/kernel/apic/apic.c:1097
asm_sysvec_apic_timer_interrupt+0x12/0x20 arch/x86/include/asm/idtentry.h:638
RIP: 0010:mac80211_hwsim_tx_frame_no_nl.isra.0+0x77b/0x1330 drivers/net/wireless/mac80211_hwsim.c:1527
Code: 00 00 00 c6 84 24 98 00 00 00 00 74 bb e8 dd 48 3f fc 48 8d bb ac 3c 00 00 48 89 f8 48 89 fa 48 c1 e8 03 83 e2 07 0f b6 04 28 <38> d0 7f 08 84 c0 0f 85 36 09 00 00 44 0f b6 bb ac 3c 00 00 31 ff
RSP: 0018:ffffc90000dc0ba0 EFLAGS: 00000202
RAX: 0000000000000000 RBX: ffff8880713c32a0 RCX: 0000000000000100
RDX: 0000000000000004 RSI: ffffffff8536c303 RDI: ffff8880713c6f4c
RBP: dffffc0000000000 R08: 0000000000000002 R09: 0000000000000000
R10: ffffffff8536c339 R11: 0000000000000000 R12: ffff888085849780
R13: ffff8880317cb4d0 R14: ffff8880317cb2a0 R15: 0000000000000000
mac80211_hwsim_tx_frame+0x1ee/0x2a0 drivers/net/wireless/mac80211_hwsim.c:1784
mac80211_hwsim_beacon_tx+0x49b/0x930 drivers/net/wireless/mac80211_hwsim.c:1838
__iterate_interfaces+0x1e5/0x520 net/mac80211/util.c:793
ieee80211_iterate_active_interfaces_atomic+0x70/0x180 net/mac80211/util.c:829
mac80211_hwsim_beacon+0xd5/0x1a0 drivers/net/wireless/mac80211_hwsim.c:1861
__run_hrtimer kernel/time/hrtimer.c:1685 [inline]
__hrtimer_run_queues+0x609/0xe50 kernel/time/hrtimer.c:1749
hrtimer_run_softirq+0x17b/0x360 kernel/time/hrtimer.c:1766
__do_softirq+0x29b/0x9c2 kernel/softirq.c:558
invoke_softirq kernel/softirq.c:432 [inline]
__irq_exit_rcu+0x123/0x180 kernel/softirq.c:636
irq_exit_rcu+0x5/0x20 kernel/softirq.c:648
sysvec_apic_timer_interrupt+0x93/0xc0 arch/x86/kernel/apic/apic.c:1097
asm_sysvec_apic_timer_interrupt+0x12/0x20 arch/x86/include/asm/idtentry.h:638
RIP: 0010:PageMemcgKmem include/linux/memcontrol.h:535 [inline]
RIP: 0010:page_memcg include/linux/memcontrol.h:450 [inline]
RIP: 0010:lock_page_memcg+0x84/0x7d0 mm/memcontrol.c:1984
Code: 48 c7 c7 60 fe 97 8b e8 6a 47 98 ff e8 35 a5 9e ff 5a 84 c0 0f 84 b2 03 00 00 0f 1f 44 00 00 49 8d 47 38 48 89 c2 48 89 45 d0 <48> b8 00 00 00 00 00 fc ff df 48 c1 ea 03 80 3c 02 00 0f 85 04 05
RSP: 0018:ffffc9000e09f708 EFLAGS: 00000202
RAX: ffffea0001f8c0b8 RBX: 0000000000000000 RCX: ffffffff8161c404
RDX: ffffea0001f8c0b8 RSI: 0000000000000004 RDI: ffff8880b9d32a08
RBP: ffffc9000e09f750 R08: 0000000000000000 R09: ffff8880b9d32a0b
R10: ffffed10173a6541 R11: 0000000000000000 R12: ffffea0001f8c088
R13: 0000000000000000 R14: dffffc0000000000 R15: ffffea0001f8c080
page_remove_rmap+0x25/0x1480 mm/rmap.c:1348
zap_pte_range mm/memory.c:1362 [inline]
zap_pmd_range mm/memory.c:1481 [inline]
zap_pud_range mm/memory.c:1510 [inline]
zap_p4d_range mm/memory.c:1531 [inline]
unmap_page_range+0xed5/0x2a10 mm/memory.c:1552
unmap_single_vma+0x198/0x310 mm/memory.c:1597
unmap_vmas+0x16d/0x2f0 mm/memory.c:1629
exit_mmap+0x1d0/0x630 mm/mmap.c:3171
__mmput+0x122/0x4b0 kernel/fork.c:1115
mmput+0x58/0x60 kernel/fork.c:1136
exit_mm kernel/exit.c:501 [inline]
do_exit+0xabc/0x2a30 kernel/exit.c:812
do_group_exit+0x125/0x310 kernel/exit.c:922
get_signal+0x47f/0x2160 kernel/signal.c:2868
arch_do_signal_or_restart+0x2a9/0x1c40 arch/x86/kernel/signal.c:865
handle_signal_work kernel/entry/common.c:148 [inline]
exit_to_user_mode_loop kernel/entry/common.c:172 [inline]
exit_to_user_mode_prepare+0x17d/0x290 kernel/entry/common.c:207
__syscall_exit_to_user_mode_work kernel/entry/common.c:289 [inline]
syscall_exit_to_user_mode+0x19/0x60 kernel/entry/common.c:300
do_syscall_64+0x42/0xb0 arch/x86/entry/common.c:86
entry_SYSCALL_64_after_hwframe+0x44/0xae
RIP: 0033:0x7fd557b3b709
Code: Unable to access opcode bytes at RIP 0x7fd557b3b6df.
RSP: 002b:00007fd5550b2188 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
RAX: 0000000000033fe0 RBX: 00007fd557c3ff60 RCX: 00007fd557b3b709
RDX: 0000000000000000 RSI: 0000000020000000 RDI: 0000000000000008
RBP: 00007fd557b95cb4 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007fd558173b2f R14: 00007fd5550b2300 R15: 0000000000022000
NMI backtrace for cpu 1
CPU: 1 PID: 27934 Comm: syz-executor.2 Not tainted 5.15.0-rc2-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
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:3880 [inline]
rcu_sched_clock_irq.cold+0x9d/0x746 kernel/rcu/tree.c:2599
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+0x40/0xc0 arch/x86/kernel/apic/apic.c:1097
asm_sysvec_apic_timer_interrupt+0x12/0x20 arch/x86/include/asm/idtentry.h:638
RIP: 0010:mac80211_hwsim_tx_frame_no_nl.isra.0+0x77b/0x1330 drivers/net/wireless/mac80211_hwsim.c:1527
Code: 00 00 00 c6 84 24 98 00 00 00 00 74 bb e8 dd 48 3f fc 48 8d bb ac 3c 00 00 48 89 f8 48 89 fa 48 c1 e8 03 83 e2 07 0f b6 04 28 <38> d0 7f 08 84 c0 0f 85 36 09 00 00 44 0f b6 bb ac 3c 00 00 31 ff
RSP: 0018:ffffc90000dc0ba0 EFLAGS: 00000202
RAX: 0000000000000000 RBX: ffff8880713c32a0 RCX: 0000000000000100
RDX: 0000000000000004 RSI: ffffffff8536c303 RDI: ffff8880713c6f4c
RBP: dffffc0000000000 R08: 0000000000000002 R09: 0000000000000000
R10: ffffffff8536c339 R11: 0000000000000000 R12: ffff888085849780
R13: ffff8880317cb4d0 R14: ffff8880317cb2a0 R15: 0000000000000000
mac80211_hwsim_tx_frame+0x1ee/0x2a0 drivers/net/wireless/mac80211_hwsim.c:1784
mac80211_hwsim_beacon_tx+0x49b/0x930 drivers/net/wireless/mac80211_hwsim.c:1838
__iterate_interfaces+0x1e5/0x520 net/mac80211/util.c:793
ieee80211_iterate_active_interfaces_atomic+0x70/0x180 net/mac80211/util.c:829
mac80211_hwsim_beacon+0xd5/0x1a0 drivers/net/wireless/mac80211_hwsim.c:1861
__run_hrtimer kernel/time/hrtimer.c:1685 [inline]
__hrtimer_run_queues+0x609/0xe50 kernel/time/hrtimer.c:1749
hrtimer_run_softirq+0x17b/0x360 kernel/time/hrtimer.c:1766
__do_softirq+0x29b/0x9c2 kernel/softirq.c:558
invoke_softirq kernel/softirq.c:432 [inline]
__irq_exit_rcu+0x123/0x180 kernel/softirq.c:636
irq_exit_rcu+0x5/0x20 kernel/softirq.c:648
sysvec_apic_timer_interrupt+0x93/0xc0 arch/x86/kernel/apic/apic.c:1097
asm_sysvec_apic_timer_interrupt+0x12/0x20 arch/x86/include/asm/idtentry.h:638
RIP: 0010:PageMemcgKmem include/linux/memcontrol.h:535 [inline]
RIP: 0010:page_memcg include/linux/memcontrol.h:450 [inline]
RIP: 0010:lock_page_memcg+0x84/0x7d0 mm/memcontrol.c:1984
Code: 48 c7 c7 60 fe 97 8b e8 6a 47 98 ff e8 35 a5 9e ff 5a 84 c0 0f 84 b2 03 00 00 0f 1f 44 00 00 49 8d 47 38 48 89 c2 48 89 45 d0 <48> b8 00 00 00 00 00 fc ff df 48 c1 ea 03 80 3c 02 00 0f 85 04 05
RSP: 0018:ffffc9000e09f708 EFLAGS: 00000202
RAX: ffffea0001f8c0b8 RBX: 0000000000000000 RCX: ffffffff8161c404
RDX: ffffea0001f8c0b8 RSI: 0000000000000004 RDI: ffff8880b9d32a08
RBP: ffffc9000e09f750 R08: 0000000000000000 R09: ffff8880b9d32a0b
R10: ffffed10173a6541 R11: 0000000000000000 R12: ffffea0001f8c088
R13: 0000000000000000 R14: dffffc0000000000 R15: ffffea0001f8c080
page_remove_rmap+0x25/0x1480 mm/rmap.c:1348
zap_pte_range mm/memory.c:1362 [inline]
zap_pmd_range mm/memory.c:1481 [inline]
zap_pud_range mm/memory.c:1510 [inline]
zap_p4d_range mm/memory.c:1531 [inline]
unmap_page_range+0xed5/0x2a10 mm/memory.c:1552
unmap_single_vma+0x198/0x310 mm/memory.c:1597
unmap_vmas+0x16d/0x2f0 mm/memory.c:1629
exit_mmap+0x1d0/0x630 mm/mmap.c:3171
__mmput+0x122/0x4b0 kernel/fork.c:1115
mmput+0x58/0x60 kernel/fork.c:1136
exit_mm kernel/exit.c:501 [inline]
do_exit+0xabc/0x2a30 kernel/exit.c:812
do_group_exit+0x125/0x310 kernel/exit.c:922
get_signal+0x47f/0x2160 kernel/signal.c:2868
arch_do_signal_or_restart+0x2a9/0x1c40 arch/x86/kernel/signal.c:865
handle_signal_work kernel/entry/common.c:148 [inline]
exit_to_user_mode_loop kernel/entry/common.c:172 [inline]
exit_to_user_mode_prepare+0x17d/0x290 kernel/entry/common.c:207
__syscall_exit_to_user_mode_work kernel/entry/common.c:289 [inline]
syscall_exit_to_user_mode+0x19/0x60 kernel/entry/common.c:300
do_syscall_64+0x42/0xb0 arch/x86/entry/common.c:86
entry_SYSCALL_64_after_hwframe+0x44/0xae
RIP: 0033:0x7fd557b3b709
Code: Unable to access opcode bytes at RIP 0x7fd557b3b6df.
RSP: 002b:00007fd5550b2188 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
RAX: 0000000000033fe0 RBX: 00007fd557c3ff60 RCX: 00007fd557b3b709
RDX: 0000000000000000 RSI: 0000000020000000 RDI: 0000000000000008
RBP: 00007fd557b95cb4 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007fd558173b2f R14: 00007fd5550b2300 R15: 0000000000022000
----------------
Code disassembly (best guess):
0: 00 00 add %al,(%rax)
2: 00 c6 add %al,%dh
4: 84 24 98 test %ah,(%rax,%rbx,4)
7: 00 00 add %al,(%rax)
9: 00 00 add %al,(%rax)
b: 74 bb je 0xffffffc8
d: e8 dd 48 3f fc callq 0xfc3f48ef
12: 48 8d bb ac 3c 00 00 lea 0x3cac(%rbx),%rdi
19: 48 89 f8 mov %rdi,%rax
1c: 48 89 fa mov %rdi,%rdx
1f: 48 c1 e8 03 shr $0x3,%rax
23: 83 e2 07 and $0x7,%edx
26: 0f b6 04 28 movzbl (%rax,%rbp,1),%eax
* 2a: 38 d0 cmp %dl,%al <-- trapping instruction
2c: 7f 08 jg 0x36
2e: 84 c0 test %al,%al
30: 0f 85 36 09 00 00 jne 0x96c
36: 44 0f b6 bb ac 3c 00 movzbl 0x3cac(%rbx),%r15d
3d: 00
3e: 31 ff xor %edi,%edi