rcu: INFO: rcu_preempt detected expedited stalls on CPUs/tasks: { 1-.... } 13307 jiffies s: 2957 root: 0x2/.
rcu: blocking rcu_node structures (internal RCU debug):
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 UID: 0 PID: 6182 Comm: syz.1.77 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:asm_sysvec_irq_work+0x0/0x20
Code: 16 33 7a 0a e9 41 05 00 00 90 f3 0f 1e fa 0f 1f 00 fc 6a ff e8 f1 03 00 00 48 89 c4 48 89 e7 e8 f6 11 7a 0a e9 21 05 00 00 90 <f3> 0f 1e fa 0f 1f 00 fc 6a ff e8 d1 03 00 00 48 89 c4 48 89 e7 e8
RSP: 0018:ffffc900001e0b38 EFLAGS: 00000092
RAX: 0000000000000000 RBX: ffff888110d30e40 RCX: 1ffff11023f8395f
RDX: ffff88811fc1cafe RSI: ffffffff8d9ba18e RDI: ffff88811fc1ca80
RBP: ffff888110d330a0 R08: ffffffff8fa3a837 R09: 1ffffffff1f47506
R10: dffffc0000000000 R11: fffffbfff1f47507 R12: dffffc0000000000
R13: ffff88811fe329d0 R14: ffff88811fc1ca80 R15: ffff88811fe329d0
FS:  00007f895c20d6c0(0000) GS:ffff8881a3c13000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000200000000640 CR3: 0000000029c9a000 CR4: 00000000000006f0
Call Trace:
 <IRQ>
RIP: 0010:kfree_skbmem+0x0/0x1c0
Code: 89 df 5b 41 5e eb 23 e8 1e 6b 64 f8 eb f1 66 66 66 2e 0f 1f 84 00 00 00 00 00 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 <55> 41 57 41 56 53 48 89 fb 49 bf 00 00 00 00 00 fc ff df e8 e8 6a
RSP: 0018:ffffc900001e0b60 EFLAGS: 00000292
 mac80211_hwsim_beacon_tx+0x3f0/0x860
 __iterate_interfaces+0x2ab/0x590
 ieee80211_iterate_active_interfaces_atomic+0xdb/0x180
 mac80211_hwsim_beacon+0xbb/0x1c0
 __hrtimer_run_queues+0x52c/0xc60
 hrtimer_run_softirq+0x187/0x2b0
 handle_softirqs+0x286/0x870
 __irq_exit_rcu+0xca/0x1f0
 irq_exit_rcu+0x9/0x30
 sysvec_apic_timer_interrupt+0xa6/0xc0
 </IRQ>
 <TASK>
 asm_sysvec_apic_timer_interrupt+0x1a/0x20
RIP: 0010:__schedule+0x17c2/0x4cc0
Code: 48 89 c7 e8 20 e0 15 f6 31 ff 49 39 de 40 0f 95 c7 e8 72 e9 15 f6 48 c7 84 24 00 01 00 00 0e 36 e0 45 48 8b 84 24 f8 00 00 00 <4a> c7 04 20 00 00 00 00 4a c7 44 20 09 00 00 00 00 42 c7 44 20 11
RSP: 0018:ffffc90004c2f8a0 EFLAGS: 00000202
RAX: 1ffff92000985f34 RBX: ffff88801c6d3980 RCX: f31b1c976c394800
RDX: 0000000000000000 RSI: ffffffff8be33de0 RDI: ffffffff8be33da0
RBP: ffffc90004c2fab0 R08: ffffffff8fa3a837 R09: 1ffffffff1f47506
R10: dffffc0000000000 R11: fffffbfff1f47507 R12: dffffc0000000000
R13: 1ffff11009607557 R14: ffff8880213d0000 R15: ffff88801c6d4f14
 preempt_schedule_common+0x83/0xd0
 preempt_schedule+0xae/0xc0
 preempt_schedule_thunk+0x16/0x30
 refill_obj_stock+0x544/0x850
 obj_cgroup_charge_account+0x116/0x660
 __memcg_slab_post_alloc_hook+0x3e6/0x7f0
 kmem_cache_alloc_lru_noprof+0x2c7/0x3d0
 sock_alloc_inode+0x28/0xc0
 alloc_inode+0x6a/0x1b0
 __sock_create+0x12d/0x9f0
 __sys_socket+0xd7/0x1b0
 __x64_sys_socket+0x7a/0x90
 do_syscall_64+0xfa/0x3b0
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f895b38eba9
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 a8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f895c20d038 EFLAGS: 00000246 ORIG_RAX: 0000000000000029
RAX: ffffffffffffffda RBX: 00007f895b5d5fa0 RCX: 00007f895b38eba9
RDX: 0000000000000000 RSI: 0000000000000003 RDI: 0000000000000010
RBP: 00007f895b411e19 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f895b5d6038 R14: 00007f895b5d5fa0 R15: 00007fff77e33ab8
 </TASK>
sched: DL replenish lagged too much
