rcu: INFO: rcu_preempt self-detected stall on CPU
rcu: 1-...!: (10494 ticks this GP) idle=4ae/1/0x4000000000000000 softirq=180394/180394 fqs=0
(t=10502 jiffies g=333185 q=2118)
rcu: rcu_preempt kthread timer wakeup didn't happen for 10502 jiffies! g333185 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x402
rcu: Possible timer handling issue on cpu=1 timer-softirq=128614
rcu: rcu_preempt kthread starved for 10505 jiffies! g333185 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:28864 pid: 14 ppid: 2 flags:0x00004000
Call Trace:
context_switch kernel/sched/core.c:4681 [inline]
__schedule+0x93a/0x26f0 kernel/sched/core.c:5938
schedule+0xd3/0x270 kernel/sched/core.c:6017
schedule_timeout+0x14a/0x2a0 kernel/time/timer.c:1881
rcu_gp_fqs_loop kernel/rcu/tree.c:1996 [inline]
rcu_gp_kthread+0xd34/0x1980 kernel/rcu/tree.c:2169
kthread+0x3e5/0x4d0 kernel/kthread.c:319
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295
rcu: Stack dump where RCU GP kthread last ran:
NMI backtrace for cpu 1
CPU: 1 PID: 12327 Comm: syz-executor.4 Not tainted 5.14.0-rc7-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:105
nmi_cpu_backtrace.cold+0x44/0xd7 lib/nmi_backtrace.c:105
nmi_trigger_cpumask_backtrace+0x1b3/0x230 lib/nmi_backtrace.c:62
trigger_single_cpu_backtrace include/linux/nmi.h:164 [inline]
rcu_check_gp_kthread_starvation.cold+0x1d1/0x1d6 kernel/rcu/tree_stall.h:479
print_cpu_stall kernel/rcu/tree_stall.h:623 [inline]
check_cpu_stall kernel/rcu/tree_stall.h:700 [inline]
rcu_pending kernel/rcu/tree.c:3922 [inline]
rcu_sched_clock_irq.cold+0x9a/0x747 kernel/rcu/tree.c:2641
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:1421
__run_hrtimer kernel/time/hrtimer.c:1537 [inline]
__hrtimer_run_queues+0x1c0/0xe50 kernel/time/hrtimer.c:1601
hrtimer_interrupt+0x330/0xa00 kernel/time/hrtimer.c:1663
local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1089 [inline]
__sysvec_apic_timer_interrupt+0x146/0x530 arch/x86/kernel/apic/apic.c:1106
sysvec_apic_timer_interrupt+0x8e/0xc0 arch/x86/kernel/apic/apic.c:1100
asm_sysvec_apic_timer_interrupt+0x12/0x20 arch/x86/include/asm/idtentry.h:638
RIP: 0010:native_irq_disable arch/x86/include/asm/irqflags.h:40 [inline]
RIP: 0010:arch_local_irq_disable arch/x86/include/asm/irqflags.h:75 [inline]
RIP: 0010:arch_local_irq_save arch/x86/include/asm/irqflags.h:107 [inline]
RIP: 0010:lock_is_held_type+0x54/0x140 kernel/locking/lockdep.c:5664
Code: c0 0f 85 c8 00 00 00 65 4c 8b 24 25 40 f0 01 00 41 8b 94 24 ec 09 00 00 85 d2 0f 85 af 00 00 00 48 89 fd 41 89 f6 9c 8f 04 24 48 c7 c7 20 de 8b 89 31 db e8 6d 0e 00 00 41 8b 84 24 e8 09 00
RSP: 0018:ffffc9000ec7ecd8 EFLAGS: 00000246
RAX: 0000000000000000 RBX: 1ffff92001d8fda7 RCX: 0000000000000001
RDX: 0000000000000000 RSI: 00000000ffffffff RDI: ffffffff8b97c1c0
RBP: ffffffff8b97c1c0 R08: 0000000000000000 R09: ffffffff8d6c8257
R10: fffffbfff1ad904a R11: 0000000000000000 R12: ffff88807c920000
R13: 00000000ffffffff R14: 00000000ffffffff R15: 0000000000000000
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
__raw_spin_lock_bh include/linux/spinlock_api_smp.h:135 [inline]
_raw_spin_lock_bh+0x2f/0x40 kernel/locking/spinlock.c:175
spin_lock_bh include/linux/spinlock.h:359 [inline]
batadv_tt_local_purge+0x114/0x370 net/batman-adv/translation-table.c:1367
batadv_tt_local_resize_to_mtu+0x8e/0x130 net/batman-adv/translation-table.c:3987
batadv_update_min_mtu net/batman-adv/hard-interface.c:627 [inline]
batadv_hard_if_event+0x67d/0x15b0 net/batman-adv/hard-interface.c:963
notifier_call_chain+0xb5/0x200 kernel/notifier.c:83
call_netdevice_notifiers_info+0xb5/0x130 net/core/dev.c:2123
call_netdevice_notifiers_mtu net/core/dev.c:2172 [inline]
dev_set_mtu_ext+0x397/0x5a0 net/core/dev.c:8964
do_setlink+0x5d6/0x3960 net/core/rtnetlink.c:2685
rtnl_setlink+0x24d/0x3c0 net/core/rtnetlink.c:3015
rtnetlink_rcv_msg+0x413/0xb80 net/core/rtnetlink.c:5575
netlink_rcv_skb+0x153/0x420 net/netlink/af_netlink.c:2504
netlink_unicast_kernel net/netlink/af_netlink.c:1314 [inline]
netlink_unicast+0x533/0x7d0 net/netlink/af_netlink.c:1340
netlink_sendmsg+0x86d/0xdb0 net/netlink/af_netlink.c:1929
sock_sendmsg_nosec net/socket.c:703 [inline]
sock_sendmsg+0xcf/0x120 net/socket.c:723
sock_write_iter+0x289/0x3c0 net/socket.c:1056
call_write_iter include/linux/fs.h:2114 [inline]
do_iter_readv_writev+0x46f/0x740 fs/read_write.c:740
do_iter_write+0x188/0x670 fs/read_write.c:866
vfs_writev+0x1aa/0x630 fs/read_write.c:939
do_writev+0x27f/0x300 fs/read_write.c:982
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: 0033:0x4665f9
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:00007f1e8db68188 EFLAGS: 00000246 ORIG_RAX: 0000000000000014
RAX: ffffffffffffffda RBX: 000000000056bf80 RCX: 00000000004665f9
RDX: 0000000000000001 RSI: 0000000020000140 RDI: 0000000000000004
RBP: 00000000004bfcc4 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 000000000056bf80
R13: 00007ffd8f37e5cf R14: 00007f1e8db68300 R15: 0000000000022000
NMI backtrace for cpu 1
CPU: 1 PID: 12327 Comm: syz-executor.4 Not tainted 5.14.0-rc7-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:105
nmi_cpu_backtrace.cold+0x44/0xd7 lib/nmi_backtrace.c:105
nmi_trigger_cpumask_backtrace+0x1b3/0x230 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:342
print_cpu_stall kernel/rcu/tree_stall.h:625 [inline]
check_cpu_stall kernel/rcu/tree_stall.h:700 [inline]
rcu_pending kernel/rcu/tree.c:3922 [inline]
rcu_sched_clock_irq.cold+0x9f/0x747 kernel/rcu/tree.c:2641
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:1421
__run_hrtimer kernel/time/hrtimer.c:1537 [inline]
__hrtimer_run_queues+0x1c0/0xe50 kernel/time/hrtimer.c:1601
hrtimer_interrupt+0x330/0xa00 kernel/time/hrtimer.c:1663
local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1089 [inline]
__sysvec_apic_timer_interrupt+0x146/0x530 arch/x86/kernel/apic/apic.c:1106
sysvec_apic_timer_interrupt+0x8e/0xc0 arch/x86/kernel/apic/apic.c:1100
asm_sysvec_apic_timer_interrupt+0x12/0x20 arch/x86/include/asm/idtentry.h:638
RIP: 0010:native_irq_disable arch/x86/include/asm/irqflags.h:40 [inline]
RIP: 0010:arch_local_irq_disable arch/x86/include/asm/irqflags.h:75 [inline]
RIP: 0010:arch_local_irq_save arch/x86/include/asm/irqflags.h:107 [inline]
RIP: 0010:lock_is_held_type+0x54/0x140 kernel/locking/lockdep.c:5664
Code: c0 0f 85 c8 00 00 00 65 4c 8b 24 25 40 f0 01 00 41 8b 94 24 ec 09 00 00 85 d2 0f 85 af 00 00 00 48 89 fd 41 89 f6 9c 8f 04 24 48 c7 c7 20 de 8b 89 31 db e8 6d 0e 00 00 41 8b 84 24 e8 09 00
RSP: 0018:ffffc9000ec7ecd8 EFLAGS: 00000246
RAX: 0000000000000000 RBX: 1ffff92001d8fda7 RCX: 0000000000000001
RDX: 0000000000000000 RSI: 00000000ffffffff RDI: ffffffff8b97c1c0
RBP: ffffffff8b97c1c0 R08: 0000000000000000 R09: ffffffff8d6c8257
R10: fffffbfff1ad904a R11: 0000000000000000 R12: ffff88807c920000
R13: 00000000ffffffff R14: 00000000ffffffff R15: 0000000000000000
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
__raw_spin_lock_bh include/linux/spinlock_api_smp.h:135 [inline]
_raw_spin_lock_bh+0x2f/0x40 kernel/locking/spinlock.c:175
spin_lock_bh include/linux/spinlock.h:359 [inline]
batadv_tt_local_purge+0x114/0x370 net/batman-adv/translation-table.c:1367
batadv_tt_local_resize_to_mtu+0x8e/0x130 net/batman-adv/translation-table.c:3987
batadv_update_min_mtu net/batman-adv/hard-interface.c:627 [inline]
batadv_hard_if_event+0x67d/0x15b0 net/batman-adv/hard-interface.c:963
notifier_call_chain+0xb5/0x200 kernel/notifier.c:83
call_netdevice_notifiers_info+0xb5/0x130 net/core/dev.c:2123
call_netdevice_notifiers_mtu net/core/dev.c:2172 [inline]
dev_set_mtu_ext+0x397/0x5a0 net/core/dev.c:8964
do_setlink+0x5d6/0x3960 net/core/rtnetlink.c:2685
rtnl_setlink+0x24d/0x3c0 net/core/rtnetlink.c:3015
rtnetlink_rcv_msg+0x413/0xb80 net/core/rtnetlink.c:5575
netlink_rcv_skb+0x153/0x420 net/netlink/af_netlink.c:2504
netlink_unicast_kernel net/netlink/af_netlink.c:1314 [inline]
netlink_unicast+0x533/0x7d0 net/netlink/af_netlink.c:1340
netlink_sendmsg+0x86d/0xdb0 net/netlink/af_netlink.c:1929
sock_sendmsg_nosec net/socket.c:703 [inline]
sock_sendmsg+0xcf/0x120 net/socket.c:723
sock_write_iter+0x289/0x3c0 net/socket.c:1056
call_write_iter include/linux/fs.h:2114 [inline]
do_iter_readv_writev+0x46f/0x740 fs/read_write.c:740
do_iter_write+0x188/0x670 fs/read_write.c:866
vfs_writev+0x1aa/0x630 fs/read_write.c:939
do_writev+0x27f/0x300 fs/read_write.c:982
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: 0033:0x4665f9
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:00007f1e8db68188 EFLAGS: 00000246 ORIG_RAX: 0000000000000014
RAX: ffffffffffffffda RBX: 000000000056bf80 RCX: 00000000004665f9
RDX: 0000000000000001 RSI: 0000000020000140 RDI: 0000000000000004
RBP: 00000000004bfcc4 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 000000000056bf80
R13: 00007ffd8f37e5cf R14: 00007f1e8db68300 R15: 0000000000022000
----------------
Code disassembly (best guess):
0: c0 0f 85 rorb $0x85,(%rdi)
3: c8 00 00 00 enterq $0x0,$0x0
7: 65 4c 8b 24 25 40 f0 mov %gs:0x1f040,%r12
e: 01 00
10: 41 8b 94 24 ec 09 00 mov 0x9ec(%r12),%edx
17: 00
18: 85 d2 test %edx,%edx
1a: 0f 85 af 00 00 00 jne 0xcf
20: 48 89 fd mov %rdi,%rbp
23: 41 89 f6 mov %esi,%r14d
26: 9c pushfq
27: 8f 04 24 popq (%rsp)
* 2a: fa cli <-- trapping instruction
2b: 48 c7 c7 20 de 8b 89 mov $0xffffffff898bde20,%rdi
32: 31 db xor %ebx,%ebx
34: e8 6d 0e 00 00 callq 0xea6
39: 41 rex.B
3a: 8b .byte 0x8b
3b: 84 24 e8 test %ah,(%rax,%rbp,8)
3e: 09 00 or %eax,(%rax)