rcu: INFO: rcu_preempt self-detected stall on CPU
rcu: 0-...!: (1 GPs behind) idle=415/1/0x4000000000000000 softirq=61439/61440 fqs=1
(t=10502 jiffies g=126253 q=47)
rcu: rcu_preempt kthread starved for 10501 jiffies! g126253 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: 28751 Comm: syz-executor.2 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:__might_sleep+0x41/0x160 kernel/sched/core.c:9452
Code: fd 53 65 48 8b 1c 25 40 70 02 00 48 8d 7b 18 48 83 ec 10 48 89 fa 48 c1 ea 03 0f b6 04 02 84 c0 74 08 3c 03 0f 8e d3 00 00 00 <8b> 73 18 85 f6 74 3e 65 48 8b 1c 25 40 70 02 00 48 8d bb f8 16 00
RSP: 0018:ffffc900181ef628 EFLAGS: 00000246
RAX: 0000000000000000 RBX: ffff888020079d00 RCX: ffffffff88e845ad
RDX: 1ffff1100400f3a3 RSI: 0000000000000313 RDI: ffff888020079d18
RBP: ffffffff8ab680a0 R08: 0000000000000001 R09: ffff88801d3ab767
R10: ffffed1003a756ec R11: 0000000000000441 R12: 0000000000000313
R13: 0000000000000000 R14: 1ffff9200303ded4 R15: ffff88801d3aaf00
FS: 00007fc66575c700(0000) GS:ffff8880b9d00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f4baed869d8 CR3: 000000001c7fa000 CR4: 00000000001506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
mptcp_flush_join_list+0x3e/0x90 net/mptcp/protocol.c:787
__mptcp_move_skbs+0x7c/0x6c0 net/mptcp/protocol.c:1969
mptcp_recvmsg+0x168f/0x27b0 net/mptcp/protocol.c:2046
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: 0033:0x7fc668206709
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:00007fc66575c188 EFLAGS: 00000246 ORIG_RAX: 000000000000012b
RAX: ffffffffffffffda RBX: 00007fc66830b020 RCX: 00007fc668206709
RDX: 0000000000000002 RSI: 00000000200017c0 RDI: 0000000000000003
RBP: 00007fc668260cb4 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000100 R11: 0000000000000246 R12: 0000000000000000
R13: 00007ffedfadd32f R14: 00007fc66575c300 R15: 0000000000022000
NMI backtrace for cpu 0
CPU: 0 PID: 28748 Comm: syz-executor.0 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:preempt_count arch/x86/include/asm/preempt.h:27 [inline]
RIP: 0010:__local_bh_disable_ip+0x46/0xc0 kernel/softirq.c:326
Code: b0 23 bc 7e 65 8b 05 a9 23 bc 7e 48 31 d8 f6 c4 ff 74 23 9c 58 f6 c4 02 75 70 f7 c5 00 02 00 00 74 01 fb 65 8b 05 8a 23 bc 7e <25> ff ff ff 7f 39 d8 74 0a 5b 5d c3 e8 29 65 15 00 eb d6 48 8b 5c
RSP: 0018:ffffc900184ef6f0 EFLAGS: 00000206
RAX: 0000000000000201 RBX: 0000000000000201 RCX: 0000000000000000
RDX: 1ffff11007855886 RSI: 0000000000000001 RDI: ffff88803c2ac430
RBP: 0000000000000246 R08: 0000000000000000 R09: 0000000000000001
R10: ffffed1005d77793 R11: 0000000000000000 R12: ffff88809af0de88
R13: ffffc900184ef828 R14: dffffc0000000000 R15: ffff88809af0de00
__raw_spin_lock_bh include/linux/spinlock_api_smp.h:134 [inline]
_raw_spin_lock_bh+0x13/0x40 kernel/locking/spinlock.c:178
spin_lock_bh include/linux/spinlock.h:373 [inline]
release_sock+0x1b/0x1b0 net/core/sock.c:3196
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: 0033:0x7fce20a34709
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:00007fce1dfab188 EFLAGS: 00000246 ORIG_RAX: 000000000000012b
RAX: ffffffffffffffda RBX: 00007fce20b38f60 RCX: 00007fce20a34709
RDX: 0000000000000002 RSI: 00000000200017c0 RDI: 0000000000000003
RBP: 00007fce20a8ecb4 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000100 R11: 0000000000000246 R12: 0000000000000000
R13: 00007ffef50880df R14: 00007fce1dfab300 R15: 0000000000022000
----------------
Code disassembly (best guess):
0: fd std
1: 53 push %rbx
2: 65 48 8b 1c 25 40 70 mov %gs:0x27040,%rbx
9: 02 00
b: 48 8d 7b 18 lea 0x18(%rbx),%rdi
f: 48 83 ec 10 sub $0x10,%rsp
13: 48 89 fa mov %rdi,%rdx
16: 48 c1 ea 03 shr $0x3,%rdx
1a: 0f b6 04 02 movzbl (%rdx,%rax,1),%eax
1e: 84 c0 test %al,%al
20: 74 08 je 0x2a
22: 3c 03 cmp $0x3,%al
24: 0f 8e d3 00 00 00 jle 0xfd
* 2a: 8b 73 18 mov 0x18(%rbx),%esi <-- trapping instruction
2d: 85 f6 test %esi,%esi
2f: 74 3e je 0x6f
31: 65 48 8b 1c 25 40 70 mov %gs:0x27040,%rbx
38: 02 00
3a: 48 rex.W
3b: 8d .byte 0x8d
3c: bb .byte 0xbb
3d: f8 clc
3e: 16 (bad)