rcu: INFO: rcu_preempt self-detected stall on CPU
rcu: 1-...!: (10499 ticks this GP) idle=205/1/0x4000000000000000 softirq=13779/13779 fqs=11
(t=10501 jiffies g=19689 q=100)
rcu: rcu_preempt kthread starved for 10479 jiffies! g19689 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x0 ->cpu=0
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:1959
rcu_gp_kthread+0x1de/0x320 kernel/rcu/tree.c:2132
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 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 PID: 10065 Comm: syz-executor.2 Not tainted 5.15.0-rc3-next-20210927-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
RIP: 0010:mark_lock+0x182/0x17b0 kernel/locking/lockdep.c:4612
Code: 48 c7 43 10 00 00 00 00 48 8b 84 24 10 01 00 00 65 48 2b 04 25 28 00 00 00 0f 85 c3 11 00 00 48 81 c4 18 01 00 00 44 89 d0 5b <5d> 41 5c 41 5d 41 5e 41 5f c3 48 8d 7e 22 48 89 f8 48 c1 e8 03 0f
RSP: 0018:ffffc90000007c28 EFLAGS: 00000092
RAX: 0000000000000001 RBX: ffff88807ae5274c RCX: 1ffffffff1fa21e6
RDX: dffffc0000000000 RSI: 0000000000000200 RDI: ffffffff8fd10f30
RBP: 0000000000000200 R08: 0000000000000000 R09: ffffffff8fd0d94f
R10: 0000000000000001 R11: 0000000000000000 R12: 0000000000000009
R13: ffff88807ae527e0 R14: 0000000000000042 R15: ffff88807ae52800
FS: 00007f19052ab700(0000) GS:ffff8880b9c00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000001b2ce2c000 CR3: 0000000070f0c000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
mark_usage kernel/locking/lockdep.c:4514 [inline]
__lock_acquire+0x8a7/0x54a0 kernel/locking/lockdep.c:4969
lock_acquire kernel/locking/lockdep.c:5625 [inline]
lock_acquire+0x1ab/0x510 kernel/locking/lockdep.c:5590
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:lock_acquire+0x1ef/0x510 kernel/locking/lockdep.c:5593
Code: ef a6 7e 83 f8 01 0f 85 b4 02 00 00 9c 58 f6 c4 02 0f 85 9f 02 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:ffffc90005477600 EFLAGS: 00000206
RAX: dffffc0000000000 RBX: 1ffff92000a8eec2 RCX: ffffffff815b378f
RDX: 1ffff1100f5ca4ec RSI: 0000000000000201 RDI: 0000000000000000
RBP: 0000000000000001 R08: 0000000000000000 R09: ffffffff8fd0d9cf
R10: fffffbfff1fa1b39 R11: 0000000000000000 R12: 0000000000000000
R13: 0000000000000000 R14: ffff8881485831a0 R15: 0000000000000000
__raw_spin_lock_bh include/linux/spinlock_api_smp.h:135 [inline]
_raw_spin_lock_bh+0x2f/0x40 kernel/locking/spinlock.c:178
spin_lock_bh include/linux/spinlock.h:373 [inline]
lock_sock_fast+0x5d/0x100 net/core/sock.c:3232
mptcp_subflow_cleanup_rbuf net/mptcp/protocol.c:465 [inline]
mptcp_cleanup_rbuf net/mptcp/protocol.c:499 [inline]
mptcp_recvmsg+0xad3/0x27b0 net/mptcp/protocol.c:2069
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: 0033:0x7f1907d34709
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:00007f19052ab188 EFLAGS: 00000246 ORIG_RAX: 000000000000012b
RAX: ffffffffffffffda RBX: 00007f1907e38f60 RCX: 00007f1907d34709
RDX: 0000000000000002 RSI: 00000000200017c0 RDI: 0000000000000004
RBP: 00007f1907d8ecb4 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000100 R11: 0000000000000246 R12: 0000000000000000
R13: 00007fff4abb7fef R14: 00007f19052ab300 R15: 0000000000022000
NMI backtrace for cpu 1
CPU: 1 PID: 10060 Comm: syz-executor.0 Not tainted 5.15.0-rc3-next-20210927-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:3882 [inline]
rcu_sched_clock_irq.cold+0x9d/0x746 kernel/rcu/tree.c:2601
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:lock_acquire+0x1ef/0x510 kernel/locking/lockdep.c:5593
Code: ef a6 7e 83 f8 01 0f 85 b4 02 00 00 9c 58 f6 c4 02 0f 85 9f 02 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:ffffc900054af620 EFLAGS: 00000206
RAX: dffffc0000000000 RBX: 1ffff92000a95ec6 RCX: ffffffff815b378f
RDX: 1ffff11003878c2c RSI: 0000000000000000 RDI: 0000000000000000
RBP: 0000000000000001 R08: 0000000000000000 R09: ffffffff8fd0da07
R10: fffffbfff1fa1b40 R11: 0000000000000000 R12: 0000000000000000
R13: 0000000000000000 R14: ffff8880843318a0 R15: 0000000000000000
lock_sock_nested+0x2f/0xf0 net/core/sock.c:3183
lock_sock include/net/sock.h:1600 [inline]
mptcp_wait_data net/mptcp/protocol.c:1812 [inline]
mptcp_recvmsg+0x1047/0x27b0 net/mptcp/protocol.c:2122
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: 0033:0x7fbd99ff9709
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:00007fbd97570188 EFLAGS: 00000246 ORIG_RAX: 000000000000012b
RAX: ffffffffffffffda RBX: 00007fbd9a0fdf60 RCX: 00007fbd99ff9709
RDX: 0000000000000002 RSI: 00000000200017c0 RDI: 0000000000000004
RBP: 00007fbd9a053cb4 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000100 R11: 0000000000000246 R12: 0000000000000000
R13: 00007ffcc1c6181f R14: 00007fbd97570300 R15: 0000000000022000
----------------
Code disassembly (best guess):
0: 48 c7 43 10 00 00 00 movq $0x0,0x10(%rbx)
7: 00
8: 48 8b 84 24 10 01 00 mov 0x110(%rsp),%rax
f: 00
10: 65 48 2b 04 25 28 00 sub %gs:0x28,%rax
17: 00 00
19: 0f 85 c3 11 00 00 jne 0x11e2
1f: 48 81 c4 18 01 00 00 add $0x118,%rsp
26: 44 89 d0 mov %r10d,%eax
29: 5b pop %rbx
* 2a: 5d pop %rbp <-- trapping instruction
2b: 41 5c pop %r12
2d: 41 5d pop %r13
2f: 41 5e pop %r14
31: 41 5f pop %r15
33: c3 retq
34: 48 8d 7e 22 lea 0x22(%rsi),%rdi
38: 48 89 f8 mov %rdi,%rax
3b: 48 c1 e8 03 shr $0x3,%rax
3f: 0f .byte 0xf