BUG: sleeping function called from invalid context at net/core/sock.c:2502
in_atomic(): 1, irqs_disabled(): 0, pid: 2370, name: udevd
1 lock held by udevd/2370:
 #0:  (rcu_callback){......}, at: [<ffffffff81289ace>] __rcu_reclaim kernel/rcu/rcu.h:108 [inline]
 #0:  (rcu_callback){......}, at: [<ffffffff81289ace>] rcu_do_batch kernel/rcu/tree.c:2789 [inline]
 #0:  (rcu_callback){......}, at: [<ffffffff81289ace>] invoke_rcu_callbacks kernel/rcu/tree.c:3053 [inline]
 #0:  (rcu_callback){......}, at: [<ffffffff81289ace>] __rcu_process_callbacks kernel/rcu/tree.c:3020 [inline]
 #0:  (rcu_callback){......}, at: [<ffffffff81289ace>] rcu_process_callbacks+0x98e/0x12b0 kernel/rcu/tree.c:3037
Preemption disabled at:[  132.410153] [<ffffffff83a0848d>] __do_softirq+0xdd/0x940 kernel/softirq.c:265
CPU: 1 PID: 2370 Comm: udevd Not tainted 4.9.124-g6a1b592 #82
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
 ffff8801db307cd8 ffffffff81eb95e9 ffffffff83a0848d 0000000000000000
 0000000000000100 ffff8801bada3000 ffff8801bada3000 ffff8801db307d10
 ffffffff81426851 ffff8801bada3000 ffffffff840f88a0 00000000000009c6
Call Trace:
 <IRQ> [  132.460546]  [<ffffffff81eb95e9>] __dump_stack lib/dump_stack.c:15 [inline]
 <IRQ> [  132.460546]  [<ffffffff81eb95e9>] dump_stack+0xc1/0x128 lib/dump_stack.c:51
 [<ffffffff81426851>] ___might_sleep.cold.123+0x1bc/0x1f5 kernel/sched/core.c:7988
 [<ffffffff811bd9a5>] __might_sleep+0x95/0x1a0 kernel/sched/core.c:7945
 [<ffffffff8302b774>] lock_sock_nested+0x34/0x120 net/core/sock.c:2502
 [<ffffffff83428dd9>] lock_sock include/net/sock.h:1404 [inline]
 [<ffffffff83428dd9>] inet_shutdown+0x69/0x360 net/ipv4/af_inet.c:823
 [<ffffffff836cb740>] pppol2tp_session_close+0xa0/0xe0 net/l2tp/l2tp_ppp.c:441
 [<ffffffff836c4f71>] l2tp_tunnel_closeall+0x231/0x350 net/l2tp/l2tp_core.c:1368
 [<ffffffff836c57f2>] l2tp_tunnel_destruct+0x2f2/0x590 net/l2tp/l2tp_core.c:1324
 [<ffffffff830281f5>] __sk_destruct+0x55/0x590 net/core/sock.c:1428
 [<ffffffff812899ee>] __rcu_reclaim kernel/rcu/rcu.h:118 [inline]
 [<ffffffff812899ee>] rcu_do_batch kernel/rcu/tree.c:2789 [inline]
 [<ffffffff812899ee>] invoke_rcu_callbacks kernel/rcu/tree.c:3053 [inline]
 [<ffffffff812899ee>] __rcu_process_callbacks kernel/rcu/tree.c:3020 [inline]
 [<ffffffff812899ee>] rcu_process_callbacks+0x8ae/0x12b0 kernel/rcu/tree.c:3037
 [<ffffffff83a085c0>] __do_softirq+0x210/0x940 kernel/softirq.c:288
 [<ffffffff8114d554>] invoke_softirq kernel/softirq.c:368 [inline]
 [<ffffffff8114d554>] irq_exit+0x114/0x150 kernel/softirq.c:409
 [<ffffffff83a071a1>] exiting_irq arch/x86/include/asm/apic.h:669 [inline]
 [<ffffffff83a071a1>] smp_apic_timer_interrupt+0x81/0xa0 arch/x86/kernel/apic/apic.c:962
 [<ffffffff83a03330>] apic_timer_interrupt+0xa0/0xb0 arch/x86/entry/entry_64.S:648
 <EOI> [  132.590410]  [<ffffffff81288a72>] ? arch_local_irq_restore arch/x86/include/asm/paravirt.h:768 [inline]
 <EOI> [  132.590410]  [<ffffffff81288a72>] ? __call_rcu.constprop.69+0x2c2/0x910 kernel/rcu/tree.c:3196
 [<ffffffff812890d2>] call_rcu+0x12/0x20 kernel/rcu/tree_plugin.h:655
 [<ffffffff815c03c7>] dentry_free+0xb7/0x150 fs/dcache.c:343
 [<ffffffff815c1c6f>] __dentry_kill+0x33f/0x4c0 fs/dcache.c:583
 [<ffffffff815c5e40>] dentry_kill fs/dcache.c:610 [inline]
 [<ffffffff815c5e40>] dput.part.29+0x500/0x7b0 fs/dcache.c:827
 [<ffffffff815c610f>] dput+0x1f/0x30 fs/dcache.c:789
 [<ffffffff8159ca6b>] path_put fs/namei.c:516 [inline]
 [<ffffffff8159ca6b>] terminate_walk+0x27b/0x560 fs/namei.c:630
 [<ffffffff815a846b>] path_lookupat.isra.41+0x1cb/0x410 fs/namei.c:2301
 [<ffffffff815aded7>] filename_lookup.part.55+0x177/0x370 fs/namei.c:2317
 [<ffffffff815ae293>] filename_lookup fs/namei.c:2310 [inline]
 [<ffffffff815ae293>] user_path_at_empty+0x53/0x70 fs/namei.c:2578
 [<ffffffff81585276>] user_path_at include/linux/namei.h:55 [inline]
 [<ffffffff81585276>] vfs_fstatat+0xc6/0x170 fs/stat.c:106
 [<ffffffff81586426>] vfs_stat fs/stat.c:123 [inline]
 [<ffffffff81586426>] SYSC_newstat+0x86/0xf0 fs/stat.c:270
 [<ffffffff8158682d>] SyS_newstat+0x1d/0x30 fs/stat.c:266
 [<ffffffff81006316>] do_syscall_64+0x1a6/0x490 arch/x86/entry/common.c:282
 [<ffffffff83a019d3>] entry_SYSCALL_64_after_swapgs+0x5d/0xdb

=================================
[ INFO: inconsistent lock state ]
4.9.124-g6a1b592 #82 Tainted: G        W      
---------------------------------
inconsistent {SOFTIRQ-ON-W} -> {IN-SOFTIRQ-W} usage.
udevd/2370 [HC0[0]:SC1[3]:HE1:SE0] takes:
 (sk_lock-AF_PPPOX){+.?.+.}, at: [<ffffffff83428dd9>] lock_sock include/net/sock.h:1404 [inline]
 (sk_lock-AF_PPPOX){+.?.+.}, at: [<ffffffff83428dd9>] inet_shutdown+0x69/0x360 net/ipv4/af_inet.c:823
  mark_held_locks+0xc7/0x130 kernel/locking/lockdep.c:2660
  __trace_hardirqs_on_caller kernel/locking/lockdep.c:2689 [inline]
  trace_hardirqs_on_caller+0x38b/0x590 kernel/locking/lockdep.c:2736
  trace_hardirqs_on+0xd/0x10 kernel/locking/lockdep.c:2743
  __local_bh_enable_ip+0x6a/0xd0 kernel/softirq.c:190
  local_bh_enable include/linux/bottom_half.h:31 [inline]
  lock_sock_nested+0xdc/0x120 net/core/sock.c:2512
  lock_sock include/net/sock.h:1404 [inline]
  pppolac_release+0x52/0x400 drivers/net/ppp/pppolac.c:346
  __sock_release+0xd7/0x260 net/socket.c:605
  sock_close+0x19/0x20 net/socket.c:1059
  __fput+0x263/0x700 fs/file_table.c:208
  ____fput+0x15/0x20 fs/file_table.c:244
  task_work_run+0x10c/0x180 kernel/task_work.c:116
  tracehook_notify_resume include/linux/tracehook.h:191 [inline]
  exit_to_usermode_loop+0xfc/0x120 arch/x86/entry/common.c:161
  prepare_exit_to_usermode arch/x86/entry/common.c:191 [inline]
  syscall_return_slowpath arch/x86/entry/common.c:260 [inline]
  do_syscall_64+0x364/0x490 arch/x86/entry/common.c:287
  entry_SYSCALL_64_after_swapgs+0x5d/0xdb
irq event stamp: 1455910
hardirqs last  enabled at (1455910): [<ffffffff83a02369>] restore_regs_and_iret+0x0/0x1d
hardirqs last disabled at (1455909): [<ffffffff83a0332b>] apic_timer_interrupt+0x9b/0xb0 arch/x86/entry/entry_64.S:648
softirqs last  enabled at (1451576): [<ffffffff83a08825>] __do_softirq+0x475/0x940 kernel/softirq.c:314
softirqs last disabled at (1455825): [<ffffffff8114d554>] invoke_softirq kernel/softirq.c:368 [inline]
softirqs last disabled at (1455825): [<ffffffff8114d554>] irq_exit+0x114/0x150 kernel/softirq.c:409

other info that might help us debug this:
 Possible unsafe locking scenario:

       CPU0
       ----
  lock(sk_lock-AF_PPPOX);
  <Interrupt>
    lock(sk_lock-AF_PPPOX);

 *** DEADLOCK ***

1 lock held by udevd/2370:
 #0:  (rcu_callback){......}, at: [<ffffffff81289ace>] __rcu_reclaim kernel/rcu/rcu.h:108 [inline]
 #0:  (rcu_callback){......}, at: [<ffffffff81289ace>] rcu_do_batch kernel/rcu/tree.c:2789 [inline]
 #0:  (rcu_callback){......}, at: [<ffffffff81289ace>] invoke_rcu_callbacks kernel/rcu/tree.c:3053 [inline]
 #0:  (rcu_callback){......}, at: [<ffffffff81289ace>] __rcu_process_callbacks kernel/rcu/tree.c:3020 [inline]
 #0:  (rcu_callback){......}, at: [<ffffffff81289ace>] rcu_process_callbacks+0x98e/0x12b0 kernel/rcu/tree.c:3037

stack backtrace:
CPU: 1 PID: 2370 Comm: udevd Tainted: G        W       4.9.124-g6a1b592 #82
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
 ffff8801db307a58 ffffffff81eb95e9 ffff8801bada3000 ffffffff85610ee0
 ffff8801bada38f0 ffff8801bada3910 0000000000000000 ffff8801db307ac8
 ffffffff81429ccd 0000000000000003 0000000000000001 ffff880100000000
Call Trace:
 <IRQ> [  133.015390]  [<ffffffff81eb95e9>] __dump_stack lib/dump_stack.c:15 [inline]
 <IRQ> [  133.015390]  [<ffffffff81eb95e9>] dump_stack+0xc1/0x128 lib/dump_stack.c:51
 [<ffffffff81429ccd>] print_usage_bug.cold.57+0x327/0x421 kernel/locking/lockdep.c:2387
 [<ffffffff81237726>] valid_state kernel/locking/lockdep.c:2400 [inline]
 [<ffffffff81237726>] mark_lock_irq kernel/locking/lockdep.c:2602 [inline]
 [<ffffffff81237726>] mark_lock+0xcc6/0x1280 kernel/locking/lockdep.c:3065
 [<ffffffff812390f0>] mark_irqflags kernel/locking/lockdep.c:2923 [inline]
 [<ffffffff812390f0>] __lock_acquire+0xd40/0x4070 kernel/locking/lockdep.c:3302
 [<ffffffff8123ce90>] lock_acquire+0x130/0x3e0 kernel/locking/lockdep.c:3756
 [<ffffffff8302b806>] lock_sock_nested+0xc6/0x120 net/core/sock.c:2511
 [<ffffffff83428dd9>] lock_sock include/net/sock.h:1404 [inline]
 [<ffffffff83428dd9>] inet_shutdown+0x69/0x360 net/ipv4/af_inet.c:823
 [<ffffffff836cb740>] pppol2tp_session_close+0xa0/0xe0 net/l2tp/l2tp_ppp.c:441
 [<ffffffff836c4f71>] l2tp_tunnel_closeall+0x231/0x350 net/l2tp/l2tp_core.c:1368
 [<ffffffff836c57f2>] l2tp_tunnel_destruct+0x2f2/0x590 net/l2tp/l2tp_core.c:1324
 [<ffffffff830281f5>] __sk_destruct+0x55/0x590 net/core/sock.c:1428
 [<ffffffff812899ee>] __rcu_reclaim kernel/rcu/rcu.h:118 [inline]
 [<ffffffff812899ee>] rcu_do_batch kernel/rcu/tree.c:2789 [inline]
 [<ffffffff812899ee>] invoke_rcu_callbacks kernel/rcu/tree.c:3053 [inline]
 [<ffffffff812899ee>] __rcu_process_callbacks kernel/rcu/tree.c:3020 [inline]
 [<ffffffff812899ee>] rcu_process_callbacks+0x8ae/0x12b0 kernel/rcu/tree.c:3037
 [<ffffffff83a085c0>] __do_softirq+0x210/0x940 kernel/softirq.c:288
 [<ffffffff8114d554>] invoke_softirq kernel/softirq.c:368 [inline]
 [<ffffffff8114d554>] irq_exit+0x114/0x150 kernel/softirq.c:409
 [<ffffffff83a071a1>] exiting_irq arch/x86/include/asm/apic.h:669 [inline]
 [<ffffffff83a071a1>] smp_apic_timer_interrupt+0x81/0xa0 arch/x86/kernel/apic/apic.c:962
 [<ffffffff83a03330>] apic_timer_interrupt+0xa0/0xb0 arch/x86/entry/entry_64.S:648
 <EOI> [  133.186652]  [<ffffffff81288a72>] ? arch_local_irq_restore arch/x86/include/asm/paravirt.h:768 [inline]
 <EOI> [  133.186652]  [<ffffffff81288a72>] ? __call_rcu.constprop.69+0x2c2/0x910 kernel/rcu/tree.c:3196
 [<ffffffff812890d2>] call_rcu+0x12/0x20 kernel/rcu/tree_plugin.h:655
 [<ffffffff815c03c7>] dentry_free+0xb7/0x150 fs/dcache.c:343
 [<ffffffff815c1c6f>] __dentry_kill+0x33f/0x4c0 fs/dcache.c:583
 [<ffffffff815c5e40>] dentry_kill fs/dcache.c:610 [inline]
 [<ffffffff815c5e40>] dput.part.29+0x500/0x7b0 fs/dcache.c:827
 [<ffffffff815c610f>] dput+0x1f/0x30 fs/dcache.c:789
 [<ffffffff8159ca6b>] path_put fs/namei.c:516 [inline]
 [<ffffffff8159ca6b>] terminate_walk+0x27b/0x560 fs/namei.c:630
 [<ffffffff815a846b>] path_lookupat.isra.41+0x1cb/0x410 fs/namei.c:2301
 [<ffffffff815aded7>] filename_lookup.part.55+0x177/0x370 fs/namei.c:2317
 [<ffffffff815ae293>] filename_lookup fs/namei.c:2310 [inline]
 [<ffffffff815ae293>] user_path_at_empty+0x53/0x70 fs/namei.c:2578
 [<ffffffff81585276>] user_path_at include/linux/namei.h:55 [inline]
 [<ffffffff81585276>] vfs_fstatat+0xc6/0x170 fs/stat.c:106
 [<ffffffff81586426>] vfs_stat fs/stat.c:123 [inline]
 [<ffffffff81586426>] SYSC_newstat+0x86/0xf0 fs/stat.c:270
 [<ffffffff8158682d>] SyS_newstat+0x1d/0x30 fs/stat.c:266
 [<ffffffff81006316>] do_syscall_64+0x1a6/0x490 arch/x86/entry/common.c:282
 [<ffffffff83a019d3>] entry_SYSCALL_64_after_swapgs+0x5d/0xdb
==================================================================
BUG: KASAN: use-after-free in inet_shutdown+0x2dc/0x360 net/ipv4/af_inet.c:824
Read of size 4 at addr ffff8801cbc61980 by task udevd/2370

CPU: 1 PID: 2370 Comm: udevd Tainted: G        W       4.9.124-g6a1b592 #82
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
 ffff8801db307cf8 ffffffff81eb95e9 ffffea00072f1800 ffff8801cbc61980
 0000000000000000 ffff8801cbc61980 ffff8801a51bef58 ffff8801db307d30
 ffffffff8156c35e ffff8801cbc61980 0000000000000004 0000000000000000
Call Trace:
 <IRQ> [  133.438870]  [<ffffffff81eb95e9>] __dump_stack lib/dump_stack.c:15 [inline]
 <IRQ> [  133.438870]  [<ffffffff81eb95e9>] dump_stack+0xc1/0x128 lib/dump_stack.c:51
 [<ffffffff8156c35e>] print_address_description+0x6c/0x234 mm/kasan/report.c:256
 [<ffffffff8156c768>] kasan_report_error mm/kasan/report.c:355 [inline]
 [<ffffffff8156c768>] kasan_report.cold.6+0x242/0x2fe mm/kasan/report.c:412
 [<ffffffff8153fad4>] __asan_report_load4_noabort+0x14/0x20 mm/kasan/report.c:432
 [<ffffffff8342904c>] inet_shutdown+0x2dc/0x360 net/ipv4/af_inet.c:824
 [<ffffffff836cb740>] pppol2tp_session_close+0xa0/0xe0 net/l2tp/l2tp_ppp.c:441
 [<ffffffff836c4f71>] l2tp_tunnel_closeall+0x231/0x350 net/l2tp/l2tp_core.c:1368
 [<ffffffff836c57f2>] l2tp_tunnel_destruct+0x2f2/0x590 net/l2tp/l2tp_core.c:1324
 [<ffffffff830281f5>] __sk_destruct+0x55/0x590 net/core/sock.c:1428
 [<ffffffff812899ee>] __rcu_reclaim kernel/rcu/rcu.h:118 [inline]
 [<ffffffff812899ee>] rcu_do_batch kernel/rcu/tree.c:2789 [inline]
 [<ffffffff812899ee>] invoke_rcu_callbacks kernel/rcu/tree.c:3053 [inline]
 [<ffffffff812899ee>] __rcu_process_callbacks kernel/rcu/tree.c:3020 [inline]
 [<ffffffff812899ee>] rcu_process_callbacks+0x8ae/0x12b0 kernel/rcu/tree.c:3037
 [<ffffffff83a085c0>] __do_softirq+0x210/0x940 kernel/softirq.c:288
 [<ffffffff8114d554>] invoke_softirq kernel/softirq.c:368 [inline]
 [<ffffffff8114d554>] irq_exit+0x114/0x150 kernel/softirq.c:409
 [<ffffffff83a071a1>] exiting_irq arch/x86/include/asm/apic.h:669 [inline]
 [<ffffffff83a071a1>] smp_apic_timer_interrupt+0x81/0xa0 arch/x86/kernel/apic/apic.c:962
 [<ffffffff83a03330>] apic_timer_interrupt+0xa0/0xb0 arch/x86/entry/entry_64.S:648
 <EOI> [  133.563667]  [<ffffffff81288a72>] ? arch_local_irq_restore arch/x86/include/asm/paravirt.h:768 [inline]
 <EOI> [  133.563667]  [<ffffffff81288a72>] ? __call_rcu.constprop.69+0x2c2/0x910 kernel/rcu/tree.c:3196
 [<ffffffff812890d2>] call_rcu+0x12/0x20 kernel/rcu/tree_plugin.h:655
 [<ffffffff815c03c7>] dentry_free+0xb7/0x150 fs/dcache.c:343
 [<ffffffff815c1c6f>] __dentry_kill+0x33f/0x4c0 fs/dcache.c:583
 [<ffffffff815c5e40>] dentry_kill fs/dcache.c:610 [inline]
 [<ffffffff815c5e40>] dput.part.29+0x500/0x7b0 fs/dcache.c:827
 [<ffffffff815c610f>] dput+0x1f/0x30 fs/dcache.c:789
 [<ffffffff8159ca6b>] path_put fs/namei.c:516 [inline]
 [<ffffffff8159ca6b>] terminate_walk+0x27b/0x560 fs/namei.c:630
 [<ffffffff815a846b>] path_lookupat.isra.41+0x1cb/0x410 fs/namei.c:2301
 [<ffffffff815aded7>] filename_lookup.part.55+0x177/0x370 fs/namei.c:2317
 [<ffffffff815ae293>] filename_lookup fs/namei.c:2310 [inline]
 [<ffffffff815ae293>] user_path_at_empty+0x53/0x70 fs/namei.c:2578
 [<ffffffff81585276>] user_path_at include/linux/namei.h:55 [inline]
 [<ffffffff81585276>] vfs_fstatat+0xc6/0x170 fs/stat.c:106
 [<ffffffff81586426>] vfs_stat fs/stat.c:123 [inline]
 [<ffffffff81586426>] SYSC_newstat+0x86/0xf0 fs/stat.c:270
 [<ffffffff8158682d>] SyS_newstat+0x1d/0x30 fs/stat.c:266
 [<ffffffff81006316>] do_syscall_64+0x1a6/0x490 arch/x86/entry/common.c:282
 [<ffffffff83a019d3>] entry_SYSCALL_64_after_swapgs+0x5d/0xdb

Allocated by task 11627:
 save_stack_trace+0x16/0x20 arch/x86/kernel/stacktrace.c:57
 save_stack+0x43/0xd0 mm/kasan/kasan.c:505
 set_track mm/kasan/kasan.c:517 [inline]
 kasan_kmalloc+0xc7/0xe0 mm/kasan/kasan.c:609
 kasan_slab_alloc+0x12/0x20 mm/kasan/kasan.c:547
 slab_post_alloc_hook mm/slab.h:417 [inline]
 slab_alloc_node mm/slub.c:2715 [inline]
 slab_alloc mm/slub.c:2723 [inline]
 kmem_cache_alloc+0xbe/0x290 mm/slub.c:2728
 sock_alloc_inode+0x1d/0x260 net/socket.c:251
 alloc_inode+0x63/0x180 fs/inode.c:207
 new_inode_pseudo+0x17/0xe0 fs/inode.c:890
 sock_alloc+0x41/0x280 net/socket.c:571
 __sock_create+0x8d/0x5f0 net/socket.c:1159
 sock_create net/socket.c:1235 [inline]
 SYSC_socket net/socket.c:1265 [inline]
 SyS_socket+0xf0/0x1b0 net/socket.c:1245
 do_syscall_64+0x1a6/0x490 arch/x86/entry/common.c:282
 entry_SYSCALL_64_after_swapgs+0x5d/0xdb

Freed by task 11626:
 save_stack_trace+0x16/0x20 arch/x86/kernel/stacktrace.c:57
 save_stack+0x43/0xd0 mm/kasan/kasan.c:505
 set_track mm/kasan/kasan.c:517 [inline]
 kasan_slab_free+0x72/0xc0 mm/kasan/kasan.c:582
 slab_free_hook mm/slub.c:1355 [inline]
 slab_free_freelist_hook mm/slub.c:1377 [inline]
 slab_free mm/slub.c:2958 [inline]
 kmem_cache_free+0xbe/0x310 mm/slub.c:2980
 sock_destroy_inode+0x56/0x70 net/socket.c:281
 destroy_inode+0xc5/0x120 fs/inode.c:264
 evict+0x32b/0x4f0 fs/inode.c:570
 iput_final fs/inode.c:1516 [inline]
 iput+0x371/0x900 fs/inode.c:1543
 dentry_unlink_inode+0x277/0x330 fs/dcache.c:367
 __dentry_kill+0x280/0x4c0 fs/dcache.c:569
 dentry_kill fs/dcache.c:610 [inline]
 dput.part.29+0x5cf/0x7b0 fs/dcache.c:827
 dput+0x1f/0x30 fs/dcache.c:789
 __fput+0x42f/0x700 fs/file_table.c:226
 ____fput+0x15/0x20 fs/file_table.c:244
 task_work_run+0x10c/0x180 kernel/task_work.c:116
 tracehook_notify_resume include/linux/tracehook.h:191 [inline]
 exit_to_usermode_loop+0xfc/0x120 arch/x86/entry/common.c:161
 prepare_exit_to_usermode arch/x86/entry/common.c:191 [inline]
 syscall_return_slowpath arch/x86/entry/common.c:260 [inline]
 do_syscall_64+0x364/0x490 arch/x86/entry/common.c:287
 entry_SYSCALL_64_after_swapgs+0x5d/0xdb

The buggy address belongs to the object at ffff8801cbc61980
 which belongs to the cache sock_inode_cache of size 960
The buggy address is located 0 bytes inside of
 960-byte region [ffff8801cbc61980, ffff8801cbc61d40)
The buggy address belongs to the page:
page:ffffea00072f1800 count:1 mapcount:0 mapping:          (null) index:0x0 compound_mapcount: 0
flags: 0x8000000000004080(slab|head)
page dumped because: kasan: bad access detected

Memory state around the buggy address:
 ffff8801cbc61880: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
 ffff8801cbc61900: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
>ffff8801cbc61980: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
                   ^
 ffff8801cbc61a00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
 ffff8801cbc61a80: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
==================================================================