rcu: INFO: rcu_preempt self-detected stall on CPU
rcu: 0-...!: (10499 ticks this GP) idle=13d/1/0x4000000000000000 softirq=29033/29033 fqs=58
(t=10501 jiffies g=47257 q=119)
rcu: rcu_preempt kthread starved for 10383 jiffies! g47257 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: 15167 Comm: syz-executor.3 Not tainted 5.15.0-rc2-next-20210924-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
RIP: 0010:native_apic_mem_write+0x8/0x10 arch/x86/include/asm/apic.h:110
Code: c7 c0 b7 ef 8e e8 68 ce 89 00 eb b0 66 0f 1f 44 00 00 be 01 00 00 00 e9 b6 3d 2d 00 cc cc cc cc cc cc 89 ff 89 b7 00 c0 5f ff 0f 1f 80 00 00 00 00 48 b8 00 00 00 00 00 fc ff df 53 89 fb 48
RSP: 0018:ffffc90000dc0eb8 EFLAGS: 00000046
RAX: dffffc0000000000 RBX: ffffffff8b339a60 RCX: 0000000000000020
RDX: 1ffffffff166734e RSI: 00000000000000d6 RDI: 0000000000000380
RBP: ffff8880b9d27300 R08: 000000000000003f R09: 0000000000000000
R10: ffffffff816909b7 R11: 0000000000000000 R12: 00000000000000d6
R13: 0000000000000020 R14: 0000000000000001 R15: ffff8880b9d2a3c0
FS: 00007f4808e5b700(0000) GS:ffff8880b9d00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000001b2d32b000 CR3: 00000000357a2000 CR4: 00000000001506e0
Call Trace:
apic_write arch/x86/include/asm/apic.h:394 [inline]
lapic_next_event+0x4d/0x80 arch/x86/kernel/apic/apic.c:469
clockevents_program_event+0x254/0x370 kernel/time/clockevents.c:334
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_is_held_type+0xff/0x140 kernel/locking/lockdep.c:5673
Code: 00 00 b8 ff ff ff ff 65 0f c1 05 2c 31 d0 76 83 f8 01 75 29 9c 58 f6 c4 02 75 3d 48 f7 04 24 00 02 00 00 74 01 fb 48 83 c4 08 <44> 89 e8 5b 5d 41 5c 41 5d 41 5e 41 5f c3 45 31 ed eb b9 0f 0b 48
RSP: 0018:ffffc9000458f5d0 EFLAGS: 00000292
RAX: 0000000000000046 RBX: 0000000000000001 RCX: 0000000000000001
RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000000
RBP: ffffffff8b9807e0 R08: 0000000000000000 R09: ffff8880b9d3aa0b
R10: ffffed10173a7541 R11: 0000000000000000 R12: ffff88801d695700
R13: 0000000000000000 R14: 00000000ffffffff R15: ffff88801d696168
lock_is_held include/linux/lockdep.h:283 [inline]
rcu_read_lock_sched_held+0x3a/0x70 kernel/rcu/update.c:125
trace_lock_acquire include/trace/events/lock.h:13 [inline]
lock_acquire+0x442/0x510 kernel/locking/lockdep.c:5596
lock_sock_fast+0x36/0x100 net/core/sock.c:3229
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:2044
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: 0033:0x7f480b8e4709
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:00007f4808e5b188 EFLAGS: 00000246 ORIG_RAX: 000000000000012b
RAX: ffffffffffffffda RBX: 00007f480b9e8f60 RCX: 00007f480b8e4709
RDX: 0000000000000002 RSI: 00000000200017c0 RDI: 0000000000000005
RBP: 00007f480b93ecb4 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000100 R11: 0000000000000246 R12: 0000000000000000
R13: 00007ffe57646bcf R14: 00007f4808e5b300 R15: 0000000000022000
NMI backtrace for cpu 0
CPU: 0 PID: 15165 Comm: syz-executor.5 Not tainted 5.15.0-rc2-next-20210924-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:lock_release+0x3f1/0x720 kernel/locking/lockdep.c:5633
Code: 7e 83 f8 01 0f 85 8d 01 00 00 9c 58 f6 c4 02 0f 85 78 01 00 00 48 f7 04 24 00 02 00 00 74 01 fb 48 b8 00 00 00 00 00 fc ff df <48> 01 c5 48 c7 45 00 00 00 00 00 c7 45 08 00 00 00 00 48 8b 84 24
RSP: 0018:ffffc900041af650 EFLAGS: 00000206
RAX: dffffc0000000000 RBX: ffffffffffffffff RCX: 0000000000000000
RDX: 1ffff1100463dc2c RSI: 0000000000000201 RDI: 0000000000000000
RBP: 1ffff92000835ecc R08: 0000000000000001 R09: ffffffff8fd0da07
R10: fffffbfff1fa1b40 R11: 000000000000063b R12: 0000000000000000
R13: 0000000000000002 R14: ffff8880231ee160 R15: ffff8880231ed700
sock_release_ownership include/net/sock.h:1567 [inline]
release_sock+0x171/0x1b0 net/core/sock.c:3206
mptcp_wait_data net/mptcp/protocol.c:1787 [inline]
mptcp_recvmsg+0xfd1/0x27b0 net/mptcp/protocol.c:2097
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: 0033:0x7fbdc60d3709
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:00007fbdc364a188 EFLAGS: 00000246 ORIG_RAX: 000000000000012b
RAX: ffffffffffffffda RBX: 00007fbdc61d7f60 RCX: 00007fbdc60d3709
RDX: 0000000000000002 RSI: 00000000200017c0 RDI: 0000000000000005
RBP: 00007fbdc612dcb4 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000100 R11: 0000000000000246 R12: 0000000000000000
R13: 00007ffec5e4bfaf R14: 00007fbdc364a300 R15: 0000000000022000
----------------
Code disassembly (best guess):
0: c7 c0 b7 ef 8e e8 mov $0xe88eefb7,%eax
6: 68 ce 89 00 eb pushq $0xffffffffeb0089ce
b: b0 66 mov $0x66,%al
d: 0f 1f 44 00 00 nopl 0x0(%rax,%rax,1)
12: be 01 00 00 00 mov $0x1,%esi
17: e9 b6 3d 2d 00 jmpq 0x2d3dd2
1c: cc int3
1d: cc int3
1e: cc int3
1f: cc int3
20: cc int3
21: cc int3
22: 89 ff mov %edi,%edi
24: 89 b7 00 c0 5f ff mov %esi,-0xa04000(%rdi)
* 2a: c3 retq <-- trapping instruction
2b: 0f 1f 80 00 00 00 00 nopl 0x0(%rax)
32: 48 b8 00 00 00 00 00 movabs $0xdffffc0000000000,%rax
39: fc ff df
3c: 53 push %rbx
3d: 89 fb mov %edi,%ebx
3f: 48 rex.W