lec0: NETDEV WATCHDOG: CPU: 0: transmit queue 0 timed out 5010 ms
lec:lec_tx_timeout: lec0
rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: 	1-...!: (0 ticks this GP) idle=99cc/1/0x4000000000000000 softirq=284986/284986 fqs=0
rcu: 	(detected by 0, t=10502 jiffies, g=165993, q=88 ncpus=2)
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 UID: 0 PID: 5814 Comm: syz-executor Not tainted syzkaller #0 PREEMPT(full) 
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.2-debian-1.16.2-1 04/01/2014
RIP: 0010:mm_get_cid+0xb1/0x130
Code: 41 5f 5d c3 cc cc cc cc cc 49 c7 c5 c8 44 f8 8d 49 c1 ed 03 bd 00 00 00 80 eb 07 44 89 f0 f7 d8 71 d4 f3 90 43 0f b6 44 25 00 <84> c0 75 41 44 8b 3d dc fc 63 0c 48 89 df 4c 89 fe e8 b9 2a 0b 03
RSP: 0018:ffffc90004957988 EFLAGS: 00000887
RAX: 0000000000000000 RBX: ffff8881b95ab050 RCX: dffffc0000000000
RDX: 0000000000000002 RSI: 0000000000000002 RDI: ffff8881b95ab050
RBP: 0000000080000000 R08: ffff8881b95aaed3 R09: 1ffff110372b55da
R10: dffffc0000000000 R11: ffffed10372b55db R12: dffffc0000000000
R13: 1ffffffff1bf0899 R14: 0000000080000000 R15: 0000000000000002
FS:  000055555bb71500(0000) GS:ffff8882a96e8000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000200000000240 CR3: 0000000189ccc000 CR4: 00000000000006f0
Call Trace:
 <TASK>
 __schedule+0x21ad/0x5050
 schedule+0x164/0x360
 do_nanosleep+0x1c2/0x620
 hrtimer_nanosleep+0x188/0x390
 __se_sys_clock_nanosleep+0x35b/0x3b0
 do_syscall_64+0xe2/0xf80
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f0c2c35c84e
Code: Unable to access opcode bytes at 0x7f0c2c35c824.
RSP: 002b:00007ffcead348c8 EFLAGS: 00000246 ORIG_RAX: 00000000000000e6
RAX: ffffffffffffffda RBX: 000055555bb71500 RCX: 00007f0c2c35c84e
RDX: 00007ffcead34920 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 00007ffcead3498c R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000001388
R13: 00000000000927c0 R14: 00000000000b864c R15: 00007ffcead349e0
 </TASK>
rcu: rcu_preempt kthread timer wakeup didn't happen for 10501 jiffies! g165993 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x402
rcu: 	Possible timer handling issue on cpu=1 timer-softirq=61571
rcu: rcu_preempt kthread starved for 10502 jiffies! g165993 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:27448 pid:16    tgid:16    ppid:2      task_flags:0x208040 flags:0x00080000
Call Trace:
 <TASK>
 __schedule+0x14ea/0x5050
 schedule+0x164/0x360
 schedule_timeout+0x158/0x2c0
 rcu_gp_fqs_loop+0x312/0x1560
 rcu_gp_kthread+0x9d/0x3b0
 kthread+0x726/0x8b0
 ret_from_fork+0x51b/0xa40
 ret_from_fork_asm+0x1a/0x30
 </TASK>
