rcu: INFO: rcu_preempt self-detected stall on CPU
rcu: 0-...!: (1 GPs behind) idle=df5/1/0x4000000000000000 softirq=45207/45208 fqs=62
(t=10500 jiffies g=75849 q=201)
rcu: rcu_preempt kthread starved for 10365 jiffies! g75849 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:4955 [inline]
__schedule+0x940/0x26f0 kernel/sched/core.c:6236
schedule+0xd3/0x270 kernel/sched/core.c:6315
schedule_timeout+0x14a/0x2a0 kernel/time/timer.c:1881
rcu_gp_fqs_loop+0x186/0x810 kernel/rcu/tree.c:1955
rcu_gp_kthread+0x1de/0x320 kernel/rcu/tree.c:2128
kthread+0x405/0x4f0 kernel/kthread.c:327
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295
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: 20703 Comm: syz-executor.3 Not tainted 5.15.0-rc2-next-20210923-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
RIP: 0010:rcu_dynticks_curr_cpu_in_eqs kernel/rcu/tree.c:330 [inline]
RIP: 0010:rcu_is_watching+0x32/0xc0 kernel/rcu/tree.c:1121
Code: 7e e8 d2 86 d0 07 48 c7 c3 08 aa 03 00 83 f8 07 89 c5 0f 87 84 00 00 00 48 8d 3c ed 80 98 33 8b 48 b8 00 00 00 00 00 fc ff df <48> 89 fa 48 c1 ea 03 80 3c 02 00 75 5e 48 03 1c ed 80 98 33 8b be
RSP: 0018:ffffc90000dc0d70 EFLAGS: 00000097
RAX: dffffc0000000000 RBX: 000000000003aa08 RCX: ffffffff815b8998
RDX: 0000000000000001 RSI: 0000000000010002 RDI: ffffffff8b339888
RBP: 0000000000000001 R08: 0000000000000000 R09: ffffffff8d6e6d97
R10: fffffbfff1adcdb2 R11: 0000000000000000 R12: 0000000000000001
R13: 0000000000000000 R14: ffffffff8b99fd88 R15: 0000000000000000
FS: 00007fac8b321700(0000) GS:ffff8880b9d00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000001b2ed2b000 CR3: 0000000084c2a000 CR4: 00000000001506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
rcu_read_lock_held_common kernel/rcu/update.c:108 [inline]
rcu_read_lock_sched_held+0x1c/0x70 kernel/rcu/update.c:123
trace_lock_acquire include/trace/events/lock.h:13 [inline]
lock_acquire+0x442/0x510 kernel/locking/lockdep.c:5596
seqcount_lockdep_reader_access include/linux/seqlock.h:103 [inline]
ktime_get+0x7c/0x470 kernel/time/timekeeping.c:827
clockevents_program_event+0x141/0x370 kernel/time/clockevents.c:326
tick_program_event+0xac/0x140 kernel/time/tick-oneshot.c:44
hrtimer_interrupt+0x36e/0x790 kernel/time/hrtimer.c:1824
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+0x8e/0xc0 arch/x86/kernel/apic/apic.c:1097
asm_sysvec_apic_timer_interrupt+0x12/0x20 arch/x86/include/asm/idtentry.h:638
RIP: 0010:__local_bh_enable_ip+0xa8/0x120 kernel/softirq.c:390
Code: 1d 9d 0c bc 7e 65 8b 05 96 0c bc 7e a9 00 ff ff 00 74 45 bf 01 00 00 00 e8 35 32 09 00 e8 d0 08 36 00 fb 65 8b 05 78 0c bc 7e <85> c0 74 58 5b 5d c3 65 8b 05 c6 13 bc 7e 85 c0 75 a2 0f 0b eb 9e
RSP: 0018:ffffc9000650f720 EFLAGS: 00000206
RAX: 0000000000000000 RBX: 00000000fffffe00 RCX: 1ffffffff1adc841
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: ffffffff88e92361 R08: 0000000000000001 R09: 0000000000000001
R10: ffffffff817c6c88 R11: 000000000000063b R12: ffff88806dc0de60
R13: ffffc9000650f828 R14: dffffc0000000000 R15: ffff88806dc0de00
mptcp_wait_data net/mptcp/protocol.c:1770 [inline]
mptcp_recvmsg+0xfd1/0x27b0 net/mptcp/protocol.c:2080
inet6_recvmsg+0x11b/0x5e0 net/ipv6/af_inet6.c:659
sock_recvmsg_nosec net/socket.c:944 [inline]
____sys_recvmsg+0x527/0x600 net/socket.c:2626
___sys_recvmsg+0x127/0x200 net/socket.c:2670
do_recvmmsg+0x24d/0x6d0 net/socket.c:2764
__sys_recvmmsg net/socket.c:2843 [inline]
__do_sys_recvmmsg net/socket.c:2866 [inline]
__se_sys_recvmmsg net/socket.c:2859 [inline]
__x64_sys_recvmmsg+0x20b/0x260 net/socket.c:2859
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: 0033:0x7fac8ddaa709
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:00007fac8b321188 EFLAGS: 00000246 ORIG_RAX: 000000000000012b
RAX: ffffffffffffffda RBX: 00007fac8deaef60 RCX: 00007fac8ddaa709
RDX: 0000000000000002 RSI: 00000000200017c0 RDI: 0000000000000005
RBP: 00007fac8de04cb4 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000100 R11: 0000000000000246 R12: 0000000000000000
R13: 00007fff63b8995f R14: 00007fac8b321300 R15: 0000000000022000
NMI backtrace for cpu 0
CPU: 0 PID: 20687 Comm: syz-executor.5 Not tainted 5.15.0-rc2-next-20210923-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:3878 [inline]
rcu_sched_clock_irq.cold+0x9d/0x746 kernel/rcu/tree.c:2597
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:1428
__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+0x8e/0xc0 arch/x86/kernel/apic/apic.c:1097
asm_sysvec_apic_timer_interrupt+0x12/0x20 arch/x86/include/asm/idtentry.h:638
RIP: 0010:__raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:161 [inline]
RIP: 0010:_raw_spin_unlock_irqrestore+0x38/0x70 kernel/locking/spinlock.c:194
Code: 74 24 10 e8 aa 6a 26 f8 48 89 ef e8 f2 e0 26 f8 81 e3 00 02 00 00 75 25 9c 58 f6 c4 02 75 2d 48 85 db 74 01 fb bf 01 00 00 00 73 7e 1a f8 65 8b 05 bc 58 cd 76 85 c0 74 0a 5b 5d c3 e8 00 55
RSP: 0018:ffffc90005e3f720 EFLAGS: 00000206
RAX: 0000000000000002 RBX: 0000000000000200 RCX: 1ffffffff1fab326
RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000001
RBP: ffff888075e63640 R08: 0000000000000001 R09: ffffffff8fd0ea07
R10: 0000000000000001 R11: 0000000000000000 R12: ffff88806e73c6e0
R13: ffffc90005e3f828 R14: dffffc0000000000 R15: ffff88806e73c680
mptcp_wait_data net/mptcp/protocol.c:1774 [inline]
mptcp_recvmsg+0x10fd/0x27b0 net/mptcp/protocol.c:2080
inet6_recvmsg+0x11b/0x5e0 net/ipv6/af_inet6.c:659
sock_recvmsg_nosec net/socket.c:944 [inline]
____sys_recvmsg+0x527/0x600 net/socket.c:2626
___sys_recvmsg+0x127/0x200 net/socket.c:2670
do_recvmmsg+0x24d/0x6d0 net/socket.c:2764
__sys_recvmmsg net/socket.c:2843 [inline]
__do_sys_recvmmsg net/socket.c:2866 [inline]
__se_sys_recvmmsg net/socket.c:2859 [inline]
__x64_sys_recvmmsg+0x20b/0x260 net/socket.c:2859
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: 0033:0x7f076fde4709
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:00007f076d35b188 EFLAGS: 00000246 ORIG_RAX: 000000000000012b
RAX: ffffffffffffffda RBX: 00007f076fee8f60 RCX: 00007f076fde4709
RDX: 0000000000000002 RSI: 00000000200017c0 RDI: 0000000000000005
RBP: 00007f076fe3ecb4 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000100 R11: 0000000000000246 R12: 0000000000000000
R13: 00007ffffcdc29af R14: 00007f076d35b300 R15: 0000000000022000
----------------
Code disassembly (best guess), 1 bytes skipped:
0: e8 d2 86 d0 07 callq 0x7d086d7
5: 48 c7 c3 08 aa 03 00 mov $0x3aa08,%rbx
c: 83 f8 07 cmp $0x7,%eax
f: 89 c5 mov %eax,%ebp
11: 0f 87 84 00 00 00 ja 0x9b
17: 48 8d 3c ed 80 98 33 lea -0x74cc6780(,%rbp,8),%rdi
1e: 8b
1f: 48 b8 00 00 00 00 00 movabs $0xdffffc0000000000,%rax
26: fc ff df
* 29: 48 89 fa mov %rdi,%rdx <-- trapping instruction
2c: 48 c1 ea 03 shr $0x3,%rdx
30: 80 3c 02 00 cmpb $0x0,(%rdx,%rax,1)
34: 75 5e jne 0x94
36: 48 03 1c ed 80 98 33 add -0x74cc6780(,%rbp,8),%rbx
3d: 8b
3e: be .byte 0xbe