rcu: INFO: rcu_preempt self-detected stall on CPU
rcu: 0-...!: (1 GPs behind) idle=743/1/0x4000000000000000 softirq=5900/5902 fqs=44
(t=10501 jiffies g=5153 q=723 ncpus=2)
rcu: rcu_preempt kthread timer wakeup didn't happen for 10412 jiffies! g5153 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x402
rcu: Possible timer handling issue on cpu=1 timer-softirq=2134
rcu: rcu_preempt kthread starved for 10415 jiffies! g5153 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x402 ->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:I stack:29264 pid: 16 ppid: 2 flags:0x00004000
Call Trace:
context_switch kernel/sched/core.c:5106 [inline]
__schedule+0xa9a/0x4cc0 kernel/sched/core.c:6421
schedule+0xd2/0x1f0 kernel/sched/core.c:6493
schedule_timeout+0x14a/0x2a0 kernel/time/timer.c:1907
rcu_gp_fqs_loop+0x1c0/0x840 kernel/rcu/tree.c:2078
rcu_gp_kthread+0x1de/0x320 kernel/rcu/tree.c:2267
kthread+0x2e9/0x3a0 kernel/kthread.c:376
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:298
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: 3844 Comm: syz-executor.0 Not tainted 5.18.0-rc3-next-20220422-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
RIP: 0010:queued_write_lock_slowpath+0x143/0x2d0 kernel/locking/qrwlock.c:85
Code: 00 00 00 fc ff df 49 01 c7 41 83 c6 03 41 0f b6 07 41 38 c6 7c 08 84 c0 0f 85 46 01 00 00 8b 45 00 3d 00 01 00 00 74 19 f3 90 <41> 0f b6 07 41 38 c6 7c eb 84 c0 74 e7 48 89 ef e8 e8 f7 67 00 eb
RSP: 0018:ffffc90005197c38 EFLAGS: 00000206
RAX: 0000000000000300 RBX: 1ffff92000a32f88 RCX: ffffffff815eb279
RDX: fffffbfff1ae5c29 RSI: 0000000000000004 RDI: ffffffff8d72e140
RBP: ffffffff8d72e140 R08: 0000000000000001 R09: ffffffff8d72e143
R10: fffffbfff1ae5c28 R11: 0000000000000000 R12: ffffffff8d72e144
R13: 00000000000000ff R14: 0000000000000003 R15: fffffbfff1ae5c28
FS: 00007f8bc79f7700(0000) GS:ffff8880b9d00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00000000204a0000 CR3: 000000007ee2b000 CR4: 00000000003506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
queued_write_lock include/asm-generic/qrwlock.h:97 [inline]
do_raw_write_lock+0x1ce/0x280 kernel/locking/spinlock_debug.c:210
raw_hash_sk+0xb9/0x350 net/ipv4/raw.c:100
inet6_create net/ipv6/af_inet6.c:250 [inline]
inet6_create+0x9a3/0x1030 net/ipv6/af_inet6.c:111
__sock_create+0x353/0x790 net/socket.c:1468
sock_create net/socket.c:1519 [inline]
__sys_socket_create net/socket.c:1556 [inline]
__sys_socket_create net/socket.c:1541 [inline]
__sys_socket+0x12f/0x240 net/socket.c:1589
__do_sys_socket net/socket.c:1602 [inline]
__se_sys_socket net/socket.c:1600 [inline]
__x64_sys_socket+0x6f/0xb0 net/socket.c:1600
do_syscall_x64 arch/x86/entry/common.c:50 [inline]
do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80
entry_SYSCALL_64_after_hwframe+0x44/0xae
RIP: 0033:0x7f8bc68890e9
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 b8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f8bc79f7168 EFLAGS: 00000246 ORIG_RAX: 0000000000000029
RAX: ffffffffffffffda RBX: 00007f8bc699bf60 RCX: 00007f8bc68890e9
RDX: 000008000000003c RSI: 0000000000000003 RDI: 000000000000000a
RBP: 00007f8bc68e308d R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007ffdda3b5a6f R14: 00007f8bc79f7300 R15: 0000000000022000
NMI backtrace for cpu 0
CPU: 0 PID: 3832 Comm: syz-executor.3 Not tainted 5.18.0-rc3-next-20220422-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:111
nmi_trigger_cpumask_backtrace+0x1e6/0x230 lib/nmi_backtrace.c:62
trigger_single_cpu_backtrace include/linux/nmi.h:164 [inline]
rcu_dump_cpu_stacks+0x262/0x3f0 kernel/rcu/tree_stall.h:369
print_cpu_stall kernel/rcu/tree_stall.h:665 [inline]
check_cpu_stall kernel/rcu/tree_stall.h:749 [inline]
rcu_pending kernel/rcu/tree.c:4068 [inline]
rcu_sched_clock_irq.cold+0x144/0x8fc kernel/rcu/tree.c:2755
update_process_times+0x16d/0x200 kernel/time/timer.c:1811
tick_sched_handle+0x9b/0x180 kernel/time/tick-sched.c:243
tick_sched_timer+0xee/0x120 kernel/time/tick-sched.c:1473
__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:1095 [inline]
__sysvec_apic_timer_interrupt+0x146/0x530 arch/x86/kernel/apic/apic.c:1112
sysvec_apic_timer_interrupt+0x40/0xc0 arch/x86/kernel/apic/apic.c:1106
asm_sysvec_apic_timer_interrupt+0x12/0x20 arch/x86/include/asm/idtentry.h:649
RIP: 0010:kvm_wait+0x98/0x100 arch/x86/kernel/kvm.c:1058
Code: fa 83 e2 07 38 d0 7f 04 84 c0 75 63 0f b6 07 40 38 c6 74 35 48 83 c4 10 c3 c3 e8 23 91 4b 00 eb 07 0f 00 2d da b1 94 08 fb f4 <48> 83 c4 10 c3 89 74 24 0c 48 89 3c 24 e8 56 8f 4b 00 8b 74 24 0c
RSP: 0018:ffffc900000073e8 EFLAGS: 00000246
RAX: 0000000000000007 RBX: 0000000000000000 RCX: 1ffffffff1b73199
RDX: 0000000000000000 RSI: ffffffff81807171 RDI: ffffffff8134dffd
RBP: ffff888018c60948 R08: 0000000000000000 R09: 0000000000000000
R10: ffffffff81807158 R11: 0000000000000001 R12: 0000000000000000
R13: ffffed100318c129 R14: 0000000000000001 R15: ffff8880b9c3ae40
pv_wait arch/x86/include/asm/paravirt.h:603 [inline]
pv_wait_head_or_lock kernel/locking/qspinlock_paravirt.h:470 [inline]
__pv_queued_spin_lock_slowpath+0x8c7/0xb50 kernel/locking/qspinlock.c:511
pv_queued_spin_lock_slowpath arch/x86/include/asm/paravirt.h:591 [inline]
queued_spin_lock_slowpath arch/x86/include/asm/qspinlock.h:51 [inline]
queued_spin_lock include/asm-generic/qspinlock.h:85 [inline]
do_raw_spin_lock+0x200/0x2a0 kernel/locking/spinlock_debug.c:115
spin_lock include/linux/spinlock.h:354 [inline]
task_lock include/linux/sched/task.h:170 [inline]
__get_task_comm+0x23/0x50 fs/exec.c:1219
__set_page_owner_handle mm/page_owner.c:174 [inline]
__set_page_owner+0x253/0x380 mm/page_owner.c:192
prep_new_page mm/page_alloc.c:2394 [inline]
get_page_from_freelist+0xba2/0x3e00 mm/page_alloc.c:4135
__alloc_pages+0x1b2/0x500 mm/page_alloc.c:5356
alloc_pages+0x1aa/0x310 mm/mempolicy.c:2273
alloc_slab_page mm/slub.c:1797 [inline]
allocate_slab+0x26c/0x3c0 mm/slub.c:1942
new_slab mm/slub.c:2002 [inline]
___slab_alloc+0x985/0xd90 mm/slub.c:3002
__slab_alloc.constprop.0+0x4d/0xa0 mm/slub.c:3089
slab_alloc_node mm/slub.c:3180 [inline]
slab_alloc mm/slub.c:3222 [inline]
__kmem_cache_alloc_lru mm/slub.c:3229 [inline]
kmem_cache_alloc+0x360/0x3b0 mm/slub.c:3239
skb_clone+0x170/0x3c0 net/core/skbuff.c:1520
ipv6_raw_deliver net/ipv6/raw.c:214 [inline]
raw6_local_deliver+0x2f8/0xa70 net/ipv6/raw.c:235
ip6_protocol_deliver_rcu+0x34c/0x1910 net/ipv6/ip6_input.c:382
ip6_input_finish+0x14c/0x2c0 net/ipv6/ip6_input.c:481
NF_HOOK include/linux/netfilter.h:307 [inline]
NF_HOOK include/linux/netfilter.h:301 [inline]
ip6_input+0x9c/0xd0 net/ipv6/ip6_input.c:490
dst_input include/net/dst.h:461 [inline]
ip6_rcv_finish net/ipv6/ip6_input.c:76 [inline]
NF_HOOK include/linux/netfilter.h:307 [inline]
NF_HOOK include/linux/netfilter.h:301 [inline]
ipv6_rcv+0x27f/0x3b0 net/ipv6/ip6_input.c:306
__netif_receive_skb_one_core+0x114/0x180 net/core/dev.c:5435
__netif_receive_skb+0x24/0x1b0 net/core/dev.c:5549
process_backlog+0x3a0/0x7c0 net/core/dev.c:5877
__napi_poll+0xb3/0x6e0 net/core/dev.c:6443
napi_poll net/core/dev.c:6510 [inline]
net_rx_action+0x8ec/0xc60 net/core/dev.c:6597
__do_softirq+0x29b/0x9c2 kernel/softirq.c:558
invoke_softirq kernel/softirq.c:432 [inline]
__irq_exit_rcu+0x123/0x180 kernel/softirq.c:637
irq_exit_rcu+0x5/0x20 kernel/softirq.c:649
sysvec_apic_timer_interrupt+0x93/0xc0 arch/x86/kernel/apic/apic.c:1106
asm_sysvec_apic_timer_interrupt+0x12/0x20 arch/x86/include/asm/idtentry.h:649
RIP: 0010:count_masked_bytes arch/x86/include/asm/word-at-a-time.h:30 [inline]
RIP: 0010:find_zero arch/x86/include/asm/word-at-a-time.h:70 [inline]
RIP: 0010:strscpy+0xe4/0x2a0 lib/string.c:208
Code: ff 48 f7 d0 49 89 f8 48 21 c8 49 c1 e8 03 48 b9 00 00 00 00 00 fc ff df 48 c1 e8 07 48 21 c6 41 80 3c 08 00 0f 85 92 01 00 00 <48> b9 08 06 05 04 03 02 01 00 48 89 37 48 0f af c1 48 c1 e8 38 4c
RSP: 0018:ffffc900050e6f10 EFLAGS: 00000246
RAX: 0000ffffffffffff RBX: ffff888018c60830 RCX: dffffc0000000000
RDX: ffffed100318c108 RSI: 0000332e726f7475 RDI: ffff8880139461b0
RBP: 8080808080808080 R08: 1ffff11002728c36 R09: ffff888018c60838
R10: ffffed100318c107 R11: 0000000000000001 R12: 0000000000000010
R13: 0000000000000008 R14: fefefefefefefeff R15: ffff8880139461a8
strscpy include/linux/fortify-string.h:170 [inline]
strscpy_pad+0x20/0x70 lib/string_helpers.c:788
__get_task_comm+0x35/0x50 fs/exec.c:1221
__set_page_owner_handle mm/page_owner.c:174 [inline]
__set_page_owner+0x253/0x380 mm/page_owner.c:192
prep_new_page mm/page_alloc.c:2394 [inline]
get_page_from_freelist+0xba2/0x3e00 mm/page_alloc.c:4135
__alloc_pages+0x1b2/0x500 mm/page_alloc.c:5356
alloc_pages+0x1aa/0x310 mm/mempolicy.c:2273
alloc_slab_page mm/slub.c:1797 [inline]
allocate_slab+0x26c/0x3c0 mm/slub.c:1942
new_slab mm/slub.c:2002 [inline]
___slab_alloc+0x985/0xd90 mm/slub.c:3002
__slab_alloc.constprop.0+0x4d/0xa0 mm/slub.c:3089
slab_alloc_node mm/slub.c:3180 [inline]
kmem_cache_alloc_node+0x122/0x3f0 mm/slub.c:3264
__alloc_skb+0x215/0x340 net/core/skbuff.c:414
alloc_skb include/linux/skbuff.h:1337 [inline]
__ip6_append_data.isra.0+0x2e3c/0x3df0 net/ipv6/ip6_output.c:1642
ip6_append_data+0x1e7/0x550 net/ipv6/ip6_output.c:1811
rawv6_sendmsg+0x14ff/0x3ab0 net/ipv6/raw.c:949
inet_sendmsg+0x99/0xe0 net/ipv4/af_inet.c:819
sock_sendmsg_nosec net/socket.c:705 [inline]
sock_sendmsg+0xcf/0x120 net/socket.c:725
____sys_sendmsg+0x32b/0x800 net/socket.c:2445
___sys_sendmsg+0xf3/0x170 net/socket.c:2499
__sys_sendmmsg+0x195/0x470 net/socket.c:2585
__do_sys_sendmmsg net/socket.c:2614 [inline]
__se_sys_sendmmsg net/socket.c:2611 [inline]
__x64_sys_sendmmsg+0x99/0x100 net/socket.c:2611
do_syscall_x64 arch/x86/entry/common.c:50 [inline]
do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80
entry_SYSCALL_64_after_hwframe+0x44/0xae
RIP: 0033:0x7f21570890e9
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 b8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f2155fdd168 EFLAGS: 00000246 ORIG_RAX: 0000000000000133
RAX: ffffffffffffffda RBX: 00007f215719c030 RCX: 00007f21570890e9
RDX: 0400000000000107 RSI: 0000000020008440 RDI: 0000000000000005
RBP: 00007f21570e308d R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000004 R11: 0000000000000246 R12: 0000000000000000
R13: 00007ffc628b8fcf R14: 00007f2155fdd300 R15: 0000000000022000
----------------
Code disassembly (best guess), 5 bytes skipped:
0: df 49 01 fisttps 0x1(%rcx)
3: c7 41 83 c6 03 41 0f movl $0xf4103c6,-0x7d(%rcx)
a: b6 07 mov $0x7,%dh
c: 41 38 c6 cmp %al,%r14b
f: 7c 08 jl 0x19
11: 84 c0 test %al,%al
13: 0f 85 46 01 00 00 jne 0x15f
19: 8b 45 00 mov 0x0(%rbp),%eax
1c: 3d 00 01 00 00 cmp $0x100,%eax
21: 74 19 je 0x3c
23: f3 90 pause
* 25: 41 0f b6 07 movzbl (%r15),%eax <-- trapping instruction
29: 41 38 c6 cmp %al,%r14b
2c: 7c eb jl 0x19
2e: 84 c0 test %al,%al
30: 74 e7 je 0x19
32: 48 89 ef mov %rbp,%rdi
35: e8 e8 f7 67 00 callq 0x67f822
3a: eb .byte 0xeb