netlink: 20 bytes leftover after parsing attributes in process `syz-executor.0'.
rcu: INFO: rcu_preempt self-detected stall on CPU
rcu: 	0-....: (1 GPs behind) idle=ac2/1/0x4000000000000004 softirq=105646/105653 fqs=4906 
rcu: 	 (t=10501 jiffies g=141381 q=286)
NMI backtrace for cpu 0
CPU: 0 PID: 23220 Comm: syz-executor.3 Not tainted 4.19.116-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
 <IRQ>
 __dump_stack lib/dump_stack.c:77 [inline]
 dump_stack+0x188/0x20d lib/dump_stack.c:118
 nmi_cpu_backtrace.cold+0x63/0xa2 lib/nmi_backtrace.c:101
 nmi_trigger_cpumask_backtrace+0x1a6/0x1eb lib/nmi_backtrace.c:62
 trigger_single_cpu_backtrace include/linux/nmi.h:164 [inline]
 rcu_dump_cpu_stacks+0x170/0x1bb kernel/rcu/tree.c:1340
 print_cpu_stall kernel/rcu/tree.c:1478 [inline]
 check_cpu_stall kernel/rcu/tree.c:1550 [inline]
 __rcu_pending kernel/rcu/tree.c:3293 [inline]
 rcu_pending kernel/rcu/tree.c:3336 [inline]
 rcu_check_callbacks.cold+0x634/0xddc kernel/rcu/tree.c:2682
 update_process_times+0x2a/0x70 kernel/time/timer.c:1638
 tick_sched_handle+0x9b/0x180 kernel/time/tick-sched.c:168
 tick_sched_timer+0x42/0x130 kernel/time/tick-sched.c:1278
 __run_hrtimer kernel/time/hrtimer.c:1401 [inline]
 __hrtimer_run_queues+0x2fc/0xd50 kernel/time/hrtimer.c:1463
 hrtimer_interrupt+0x312/0x770 kernel/time/hrtimer.c:1521
 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1067 [inline]
 smp_apic_timer_interrupt+0x10c/0x550 arch/x86/kernel/apic/apic.c:1092
 apic_timer_interrupt+0xf/0x20 arch/x86/entry/entry_64.S:893
RIP: 0010:__kernel_text_address+0x1/0x30 kernel/extable.c:106
Code: 48 83 c4 08 5d c3 48 89 ef e8 3b 81 2d 00 0f b6 c0 eb e0 48 c7 c7 44 00 ad 89 e8 5a e9 58 00 e9 6d ff ff ff 0f 1f 44 00 00 53 <48> 89 fb e8 17 ff ff ff 85 c0 75 17 48 81 fb 00 a0 9f 8a 72 0c 31
RSP: 0018:ffff8880ae607780 EFLAGS: 00000246 ORIG_RAX: ffffffffffffff13
RAX: dffffc0000000000 RBX: ffff8880ae6077a8 RCX: 0000000000000000
RDX: 1ffff11015cc0efe RSI: ffff8880ae607668 RDI: ffffffff81c9fc27
RBP: ffff8880ae6077f0 R08: 0000000000000001 R09: 0000000000000001
R10: 00000000000471a4 R11: 0000000000066071 R12: 0000000000000000
R13: 0000000000000000 R14: ffff8880a8852480 R15: ffff8880930c3cff
 unwind_get_return_address arch/x86/kernel/unwind_orc.c:300 [inline]
 unwind_get_return_address+0x5a/0xa0 arch/x86/kernel/unwind_orc.c:295
 __save_stack_trace+0x8a/0xf0 arch/x86/kernel/stacktrace.c:45
 save_stack+0x32/0xa0 mm/kasan/kasan.c:448
 set_track mm/kasan/kasan.c:460 [inline]
 kasan_kmalloc mm/kasan/kasan.c:553 [inline]
 kasan_kmalloc+0xbf/0xe0 mm/kasan/kasan.c:531
 kmem_cache_alloc_node_trace+0x15a/0x750 mm/slab.c:3668
 __do_kmalloc_node mm/slab.c:3688 [inline]
 __kmalloc_node_track_caller+0x38/0x70 mm/slab.c:3703
 __kmalloc_reserve.isra.0+0x39/0xe0 net/core/skbuff.c:137
 __alloc_skb+0xef/0x5b0 net/core/skbuff.c:205
 alloc_skb include/linux/skbuff.h:995 [inline]
 mrp_pdu_init net/802/mrp.c:303 [inline]
 mrp_pdu_append_vecattr_event+0x76c/0xfc0 net/802/mrp.c:402
 mrp_attr_event+0x15d/0x220 net/802/mrp.c:497
 mrp_mad_event+0x47/0x60 net/802/mrp.c:577
 mrp_join_timer+0x33/0x80 net/802/mrp.c:594
 call_timer_fn+0x177/0x700 kernel/time/timer.c:1326
 expire_timers kernel/time/timer.c:1363 [inline]
 __run_timers kernel/time/timer.c:1684 [inline]
 __run_timers kernel/time/timer.c:1652 [inline]
 run_timer_softirq+0x5d0/0x1540 kernel/time/timer.c:1697
 __do_softirq+0x26c/0x93c kernel/softirq.c:292
 invoke_softirq kernel/softirq.c:372 [inline]
 irq_exit+0x17b/0x1c0 kernel/softirq.c:412
 exiting_irq arch/x86/include/asm/apic.h:544 [inline]
 smp_apic_timer_interrupt+0x136/0x550 arch/x86/kernel/apic/apic.c:1094
 apic_timer_interrupt+0xf/0x20 arch/x86/entry/entry_64.S:893
 </IRQ>
RIP: 0010:arch_local_irq_restore arch/x86/include/asm/paravirt.h:789 [inline]
RIP: 0010:lock_release+0x42b/0x820 kernel/locking/lockdep.c:3929
Code: 84 08 00 00 00 00 00 00 48 c1 e8 03 80 3c 10 00 0f 85 e4 02 00 00 48 83 3d 49 a4 82 07 00 0f 84 36 02 00 00 48 8b 3c 24 57 9d <0f> 1f 44 00 00 48 b8 00 00 00 00 00 fc ff df 48 c7 04 03 00 00 00
RSP: 0018:ffff88800d507918 EFLAGS: 00000282 ORIG_RAX: ffffffffffffff13
RAX: 1ffffffff11a4ac9 RBX: 1ffff11001aa0f27 RCX: 1ffff1101510a59f
RDX: dffffc0000000000 RSI: 0000000000000004 RDI: 0000000000000282
RBP: ffff8880a8852480 R08: 0000000000000000 R09: 0000000000000003
R10: ffff8880a8852d80 R11: ffffffff8b3cecc8 R12: ffffffff81832060
R13: 0000000000000003 R14: ffff8880a8852480 R15: 0000000000000004
 slab_pre_alloc_hook mm/slab.h:420 [inline]
 slab_alloc mm/slab.c:3383 [inline]
 __do_kmalloc mm/slab.c:3725 [inline]
 __kmalloc+0x5a/0x770 mm/slab.c:3736
 kmalloc include/linux/slab.h:520 [inline]
 ovl_cache_entry_new+0x35/0x540 fs/overlayfs/readdir.c:153
 ovl_fill_lowest fs/overlayfs/readdir.c:210 [inline]
 ovl_fill_merge+0x5c4/0x9c0 fs/overlayfs/readdir.c:267
 dir_emit include/linux/fs.h:3425 [inline]
 configfs_readdir+0x4c7/0xad0 fs/configfs/dir.c:1727
 iterate_dir+0x472/0x5c0 fs/readdir.c:51
 ovl_dir_read fs/overlayfs/readdir.c:312 [inline]
 ovl_dir_read_merged+0x36b/0x500 fs/overlayfs/readdir.c:387
 ovl_cache_get fs/overlayfs/readdir.c:429 [inline]
 ovl_iterate+0x73a/0xc00 fs/overlayfs/readdir.c:761
 iterate_dir+0x1fe/0x5c0 fs/readdir.c:53
 __do_sys_getdents fs/readdir.c:268 [inline]
 __se_sys_getdents fs/readdir.c:249 [inline]
 __x64_sys_getdents+0x1dd/0x370 fs/readdir.c:249
 do_syscall_64+0xf9/0x620 arch/x86/entry/common.c:293
 entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x45c829
Code: 0d b7 fb ff c3 66 2e 0f 1f 84 00 00 00 00 00 66 90 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 0f 83 db b6 fb ff c3 66 2e 0f 1f 84 00 00 00 00
RSP: 002b:00007f9dac048c78 EFLAGS: 00000246 ORIG_RAX: 000000000000004e
RAX: ffffffffffffffda RBX: 00000000004dc700 RCX: 000000000045c829
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000003
RBP: 000000000078bf00 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00000000ffffffff
R13: 00000000000000f1 R14: 00000000004c376a R15: 00007f9dac0496d4
rcu: INFO: rcu_bh detected stalls on CPUs/tasks:
rcu: 	0-....: (15062 ticks this GP) idle=ac2/1/0x4000000000000004 softirq=104705/105653 fqs=4888 
rcu: 	(detected by 1, t=10529 jiffies, g=-1127, q=1)
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 PID: 23220 Comm: syz-executor.3 Not tainted 4.19.116-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
RIP: 0010:cpu_max_bits_warn include/linux/cpumask.h:121 [inline]
RIP: 0010:cpumask_check include/linux/cpumask.h:128 [inline]
RIP: 0010:cpumask_test_cpu include/linux/cpumask.h:344 [inline]
RIP: 0010:trace_local_timer_exit arch/x86/include/asm/trace/irq_vectors.h:56 [inline]
RIP: 0010:smp_apic_timer_interrupt+0x118/0x550 arch/x86/kernel/apic/apic.c:1093
Code: 02 00 0f 85 8d 03 00 00 48 83 3b 00 0f 84 90 03 00 00 48 89 df 65 ff 05 4e 78 c2 78 ff 13 0f 1f 44 00 00 65 8b 05 68 40 c1 78 <83> f8 3f 0f 87 91 02 00 00 89 c0 48 0f a3 05 bd f5 6c 02 0f 82 ca
RSP: 0018:ffff8880ae607658 EFLAGS: 00000006
RAX: 0000000000000000 RBX: ffff8880ae61f140 RCX: ffffffff815955f3
RDX: 0000000000010100 RSI: ffffffff874040bc RDI: 0000000000000005
RBP: ffff88800d507868 R08: ffff8880a8852480 R09: ffffffff8acfc008
R10: ffffffff8acfc010 R11: 0000000000000001 R12: 0000000000000000
R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000
FS:  00007f9dac049700(0000) GS:ffff8880ae600000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000001b2c023000 CR3: 0000000022afd000 CR4: 00000000001426f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <IRQ>
 apic_timer_interrupt+0xf/0x20 arch/x86/entry/entry_64.S:893
RIP: 0010:unwind_next_frame+0x134/0x18a0 arch/x86/kernel/unwind_orc.c:384
Code: 47 38 bf 01 00 00 00 48 89 44 24 10 e8 f5 a3 18 00 49 8d 47 50 48 89 c2 48 89 04 24 48 b8 00 00 00 00 00 fc ff df 48 c1 ea 03 <80> 3c 02 00 0f 85 0e 11 00 00 4d 8b 6f 50 4d 85 ed 74 30 49 8d bd
RSP: 0018:ffff8880ae607740 EFLAGS: 00000a02 ORIG_RAX: ffffffffffffff13
RAX: dffffc0000000000 RBX: 1ffff11015cc0ef0 RCX: 0000000000000000
RDX: 1ffff11015cc0f0d RSI: 0000000000000000 RDI: 0000000000000001
RBP: 0000000000000001 R08: 0000000000000001 R09: 0000000000000001
R10: 0000000000047222 R11: 0000000000066071 R12: ffff8880ae607860
R13: 0000000000000000 R14: ffff8880ae607850 R15: ffff8880ae607818
 __save_stack_trace+0x7a/0xf0 arch/x86/kernel/stacktrace.c:44
 save_stack+0x32/0xa0 mm/kasan/kasan.c:448
 set_track mm/kasan/kasan.c:460 [inline]
 kasan_kmalloc mm/kasan/kasan.c:553 [inline]
 kasan_kmalloc+0xbf/0xe0 mm/kasan/kasan.c:531
 slab_post_alloc_hook mm/slab.h:445 [inline]
 slab_alloc_node mm/slab.c:3340 [inline]
 kmem_cache_alloc_node+0x135/0x730 mm/slab.c:3647
 __alloc_skb+0xba/0x5b0 net/core/skbuff.c:193
 alloc_skb include/linux/skbuff.h:995 [inline]
 mrp_pdu_init net/802/mrp.c:303 [inline]
 mrp_pdu_append_vecattr_event+0x76c/0xfc0 net/802/mrp.c:402
 mrp_attr_event+0x15d/0x220 net/802/mrp.c:497
 mrp_mad_event+0x47/0x60 net/802/mrp.c:577
 mrp_join_timer+0x33/0x80 net/802/mrp.c:594
 call_timer_fn+0x177/0x700 kernel/time/timer.c:1326
 expire_timers kernel/time/timer.c:1363 [inline]
 __run_timers kernel/time/timer.c:1684 [inline]
 __run_timers kernel/time/timer.c:1652 [inline]
 run_timer_softirq+0x5d0/0x1540 kernel/time/timer.c:1697
 __do_softirq+0x26c/0x93c kernel/softirq.c:292
 invoke_softirq kernel/softirq.c:372 [inline]
 irq_exit+0x17b/0x1c0 kernel/softirq.c:412
 exiting_irq arch/x86/include/asm/apic.h:544 [inline]
 smp_apic_timer_interrupt+0x136/0x550 arch/x86/kernel/apic/apic.c:1094
 apic_timer_interrupt+0xf/0x20 arch/x86/entry/entry_64.S:893
 </IRQ>
RIP: 0010:arch_local_irq_restore arch/x86/include/asm/paravirt.h:789 [inline]
RIP: 0010:lock_release+0x42b/0x820 kernel/locking/lockdep.c:3929
Code: 84 08 00 00 00 00 00 00 48 c1 e8 03 80 3c 10 00 0f 85 e4 02 00 00 48 83 3d 49 a4 82 07 00 0f 84 36 02 00 00 48 8b 3c 24 57 9d <0f> 1f 44 00 00 48 b8 00 00 00 00 00 fc ff df 48 c7 04 03 00 00 00
RSP: 0018:ffff88800d507918 EFLAGS: 00000282 ORIG_RAX: ffffffffffffff13
RAX: 1ffffffff11a4ac9 RBX: 1ffff11001aa0f27 RCX: 1ffff1101510a59f
RDX: dffffc0000000000 RSI: 0000000000000004 RDI: 0000000000000282
RBP: ffff8880a8852480 R08: 0000000000000000 R09: 0000000000000003
R10: ffff8880a8852d80 R11: ffffffff8b3cecc8 R12: ffffffff81832060
R13: 0000000000000003 R14: ffff8880a8852480 R15: 0000000000000004
 slab_pre_alloc_hook mm/slab.h:420 [inline]
 slab_alloc mm/slab.c:3383 [inline]
 __do_kmalloc mm/slab.c:3725 [inline]
 __kmalloc+0x5a/0x770 mm/slab.c:3736
 kmalloc include/linux/slab.h:520 [inline]
 ovl_cache_entry_new+0x35/0x540 fs/overlayfs/readdir.c:153
 ovl_fill_lowest fs/overlayfs/readdir.c:210 [inline]
 ovl_fill_merge+0x5c4/0x9c0 fs/overlayfs/readdir.c:267
 dir_emit include/linux/fs.h:3425 [inline]
 configfs_readdir+0x4c7/0xad0 fs/configfs/dir.c:1727
 iterate_dir+0x472/0x5c0 fs/readdir.c:51
 ovl_dir_read fs/overlayfs/readdir.c:312 [inline]
 ovl_dir_read_merged+0x36b/0x500 fs/overlayfs/readdir.c:387
 ovl_cache_get fs/overlayfs/readdir.c:429 [inline]
 ovl_iterate+0x73a/0xc00 fs/overlayfs/readdir.c:761
 iterate_dir+0x1fe/0x5c0 fs/readdir.c:53
 __do_sys_getdents fs/readdir.c:268 [inline]
 __se_sys_getdents fs/readdir.c:249 [inline]
 __x64_sys_getdents+0x1dd/0x370 fs/readdir.c:249
 do_syscall_64+0xf9/0x620 arch/x86/entry/common.c:293
 entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x45c829
Code: 0d b7 fb ff c3 66 2e 0f 1f 84 00 00 00 00 00 66 90 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 0f 83 db b6 fb ff c3 66 2e 0f 1f 84 00 00 00 00
RSP: 002b:00007f9dac048c78 EFLAGS: 00000246 ORIG_RAX: 000000000000004e
RAX: ffffffffffffffda RBX: 00000000004dc700 RCX: 000000000045c829
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000003
RBP: 000000000078bf00 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00000000ffffffff
R13: 00000000000000f1 R14: 00000000004c376a R15: 00007f9dac0496d4