BUG: sleeping function called from invalid context at net/core/sock.c:2502
in_atomic(): 1, irqs_disabled(): 0, pid: 11193, name: syz-executor0
4 locks held by syz-executor0/11193:
 #0:  (sb_writers#3){.+.+.+}, at: [<ffffffff8157a2d8>] file_start_write include/linux/fs.h:2640 [inline]
 #0:  (sb_writers#3){.+.+.+}, at: [<ffffffff8157a2d8>] do_sendfile+0x918/0xc60 fs/read_write.c:1392
 #1:  (&sb->s_type->i_mutex_key#10){++++++}, at: [<ffffffff81731df2>] inode_lock include/linux/fs.h:766 [inline]
 #1:  (&sb->s_type->i_mutex_key#10){++++++}, at: [<ffffffff81731df2>] ext4_file_write_iter+0x122/0xd90 fs/ext4/file.c:100
 #2:  (rcu_read_lock){......}, at: [<ffffffff8143b160>] find_get_entry+0x0/0x540 include/linux/compiler.h:243
 #3:  (rcu_callback){......}, at: [<ffffffff81289b8e>] __rcu_reclaim kernel/rcu/rcu.h:108 [inline]
 #3:  (rcu_callback){......}, at: [<ffffffff81289b8e>] rcu_do_batch kernel/rcu/tree.c:2789 [inline]
 #3:  (rcu_callback){......}, at: [<ffffffff81289b8e>] invoke_rcu_callbacks kernel/rcu/tree.c:3053 [inline]
 #3:  (rcu_callback){......}, at: [<ffffffff81289b8e>] __rcu_process_callbacks kernel/rcu/tree.c:3020 [inline]
 #3:  (rcu_callback){......}, at: [<ffffffff81289b8e>] rcu_process_callbacks+0x98e/0x12b0 kernel/rcu/tree.c:3037
Preemption disabled at:[  180.807904] [<ffffffff83a0884d>] __do_softirq+0xdd/0x940 kernel/softirq.c:265
CPU: 1 PID: 11193 Comm: syz-executor0 Not tainted 4.9.123-g520d10d3 #29
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
 ffff8801db307cd8 ffffffff81eb9689 ffffffff83a0884d 0000000000000000
 0000000000000101 ffff8801c9cf6000 ffff8801c9cf6000 ffff8801db307d10
 ffffffff81426911 ffff8801c9cf6000 ffffffff840f8860 00000000000009c6
Call Trace:
 <IRQ> [  180.859446]  [<ffffffff81eb9689>] __dump_stack lib/dump_stack.c:15 [inline]
 <IRQ> [  180.859446]  [<ffffffff81eb9689>] dump_stack+0xc1/0x128 lib/dump_stack.c:51
 [<ffffffff81426911>] ___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
 [<ffffffff836cbac0>] pppol2tp_session_close+0xa0/0xe0 net/l2tp/l2tp_ppp.c:441
 [<ffffffff836c52f1>] l2tp_tunnel_closeall+0x231/0x350 net/l2tp/l2tp_core.c:1368
 [<ffffffff836c5b72>] l2tp_tunnel_destruct+0x2f2/0x590 net/l2tp/l2tp_core.c:1324
 [<ffffffff830281f5>] __sk_destruct+0x55/0x590 net/core/sock.c:1428
 [<ffffffff81289aae>] __rcu_reclaim kernel/rcu/rcu.h:118 [inline]
 [<ffffffff81289aae>] rcu_do_batch kernel/rcu/tree.c:2789 [inline]
 [<ffffffff81289aae>] invoke_rcu_callbacks kernel/rcu/tree.c:3053 [inline]
 [<ffffffff81289aae>] __rcu_process_callbacks kernel/rcu/tree.c:3020 [inline]
 [<ffffffff81289aae>] rcu_process_callbacks+0x8ae/0x12b0 kernel/rcu/tree.c:3037
 [<ffffffff83a08980>] __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
 [<ffffffff83a07561>] exiting_irq arch/x86/include/asm/apic.h:669 [inline]
 [<ffffffff83a07561>] smp_apic_timer_interrupt+0x81/0xa0 arch/x86/kernel/apic/apic.c:962
 [<ffffffff83a036f0>] apic_timer_interrupt+0xa0/0xb0 arch/x86/entry/entry_64.S:648
 <EOI> [  180.982776]  [<ffffffff81f2110b>] ? check_preemption_disabled+0x3b/0x170 lib/smp_processor_id.c:51
 [<ffffffff8143c5db>] pagecache_get_page+0x4b/0x720 mm/filemap.c:1201
 [<ffffffff8143d6ac>] grab_cache_page_write_begin+0x6c/0xa0 mm/filemap.c:2697
 [<ffffffff8175b9ec>] ext4_da_write_begin+0x24c/0x1020 fs/ext4/inode.c:2958
 [<ffffffff814382c1>] generic_perform_write+0x301/0x510 mm/filemap.c:2753
 [<ffffffff8143fdd2>] __generic_file_write_iter+0x352/0x540 mm/filemap.c:2878
 [<ffffffff81732133>] ext4_file_write_iter+0x463/0xd90 fs/ext4/file.c:165
 [<ffffffff81574fe0>] vfs_iter_write+0x2e0/0x460 fs/read_write.c:390
 [<ffffffff8161c06b>] iter_file_splice_write+0x5fb/0xb30 fs/splice.c:768
 [<ffffffff816170d8>] do_splice_from fs/splice.c:870 [inline]
 [<ffffffff816170d8>] direct_splice_actor+0x128/0x190 fs/splice.c:1037
 [<ffffffff81618421>] splice_direct_to_actor+0x2c1/0x7e0 fs/splice.c:992
 [<ffffffff81618ae3>] do_splice_direct+0x1a3/0x270 fs/splice.c:1080
 [<ffffffff81579eb0>] do_sendfile+0x4f0/0xc60 fs/read_write.c:1393
 [<ffffffff8157bf31>] SYSC_sendfile64 fs/read_write.c:1448 [inline]
 [<ffffffff8157bf31>] SyS_sendfile64+0xd1/0x160 fs/read_write.c:1440
 [<ffffffff81006316>] do_syscall_64+0x1a6/0x490 arch/x86/entry/common.c:282
 [<ffffffff83a01d93>] entry_SYSCALL_64_after_swapgs+0x5d/0xdb

=================================
[ INFO: inconsistent lock state ]
4.9.123-g520d10d3 #29 Tainted: G        W      
---------------------------------
inconsistent {SOFTIRQ-ON-W} -> {IN-SOFTIRQ-W} usage.
syz-executor0/11193 [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]
  pppol2tp_connect+0xd9/0x18f0 net/l2tp/l2tp_ppp.c:590
  SYSC_connect+0x1b8/0x300 net/socket.c:1575
  SyS_connect+0x24/0x30 net/socket.c:1556
  do_syscall_64+0x1a6/0x490 arch/x86/entry/common.c:282
  entry_SYSCALL_64_after_swapgs+0x5d/0xdb
irq event stamp: 14308
hardirqs last  enabled at (14308): [<ffffffff83a02729>] restore_regs_and_iret+0x0/0x1d
hardirqs last disabled at (14307): [<ffffffff83a036eb>] apic_timer_interrupt+0x9b/0xb0 arch/x86/entry/entry_64.S:648
softirqs last  enabled at (13378): [<ffffffff83a08be5>] __do_softirq+0x475/0x940 kernel/softirq.c:314
softirqs last disabled at (13967): [<ffffffff8114d554>] invoke_softirq kernel/softirq.c:368 [inline]
softirqs last disabled at (13967): [<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 ***

4 locks held by syz-executor0/11193:
 #0:  (sb_writers#3){.+.+.+}, at: [<ffffffff8157a2d8>] file_start_write include/linux/fs.h:2640 [inline]
 #0:  (sb_writers#3){.+.+.+}, at: [<ffffffff8157a2d8>] do_sendfile+0x918/0xc60 fs/read_write.c:1392
 #1:  (&sb->s_type->i_mutex_key#10){++++++}, at: [<ffffffff81731df2>] inode_lock include/linux/fs.h:766 [inline]
 #1:  (&sb->s_type->i_mutex_key#10){++++++}, at: [<ffffffff81731df2>] ext4_file_write_iter+0x122/0xd90 fs/ext4/file.c:100
 #2:  (rcu_read_lock){......}, at: [<ffffffff8143b160>] find_get_entry+0x0/0x540 include/linux/compiler.h:243
 #3:  (rcu_callback){......}, at: [<ffffffff81289b8e>] __rcu_reclaim kernel/rcu/rcu.h:108 [inline]
 #3:  (rcu_callback){......}, at: [<ffffffff81289b8e>] rcu_do_batch kernel/rcu/tree.c:2789 [inline]
 #3:  (rcu_callback){......}, at: [<ffffffff81289b8e>] invoke_rcu_callbacks kernel/rcu/tree.c:3053 [inline]
 #3:  (rcu_callback){......}, at: [<ffffffff81289b8e>] __rcu_process_callbacks kernel/rcu/tree.c:3020 [inline]
 #3:  (rcu_callback){......}, at: [<ffffffff81289b8e>] rcu_process_callbacks+0x98e/0x12b0 kernel/rcu/tree.c:3037

stack backtrace:
CPU: 1 PID: 11193 Comm: syz-executor0 Tainted: G        W       4.9.123-g520d10d3 #29
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
 ffff8801db307a58 ffffffff81eb9689 ffff8801c9cf6000 ffffffff85614690
 ffff8801c9cf6968 ffff8801c9cf6988 0000000000000000 ffff8801db307ac8
 ffffffff81429ce3 0000000000000003 0000000000000001 ffff880100000000
Call Trace:
 <IRQ> [  181.596874]  [<ffffffff81eb9689>] __dump_stack lib/dump_stack.c:15 [inline]
 <IRQ> [  181.596874]  [<ffffffff81eb9689>] dump_stack+0xc1/0x128 lib/dump_stack.c:51
 [<ffffffff81429ce3>] print_usage_bug.cold.56+0x327/0x421 kernel/locking/lockdep.c:2387
 [<ffffffff81237286>] valid_state kernel/locking/lockdep.c:2400 [inline]
 [<ffffffff81237286>] mark_lock_irq kernel/locking/lockdep.c:2602 [inline]
 [<ffffffff81237286>] mark_lock+0xcc6/0x1280 kernel/locking/lockdep.c:3065
 [<ffffffff812391b0>] mark_irqflags kernel/locking/lockdep.c:2923 [inline]
 [<ffffffff812391b0>] __lock_acquire+0xd40/0x4070 kernel/locking/lockdep.c:3302
 [<ffffffff8123cf50>] 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
 [<ffffffff836cbac0>] pppol2tp_session_close+0xa0/0xe0 net/l2tp/l2tp_ppp.c:441
 [<ffffffff836c52f1>] l2tp_tunnel_closeall+0x231/0x350 net/l2tp/l2tp_core.c:1368
 [<ffffffff836c5b72>] l2tp_tunnel_destruct+0x2f2/0x590 net/l2tp/l2tp_core.c:1324
 [<ffffffff830281f5>] __sk_destruct+0x55/0x590 net/core/sock.c:1428
 [<ffffffff81289aae>] __rcu_reclaim kernel/rcu/rcu.h:118 [inline]
 [<ffffffff81289aae>] rcu_do_batch kernel/rcu/tree.c:2789 [inline]
 [<ffffffff81289aae>] invoke_rcu_callbacks kernel/rcu/tree.c:3053 [inline]
 [<ffffffff81289aae>] __rcu_process_callbacks kernel/rcu/tree.c:3020 [inline]
 [<ffffffff81289aae>] rcu_process_callbacks+0x8ae/0x12b0 kernel/rcu/tree.c:3037
 [<ffffffff83a08980>] __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
 [<ffffffff83a07561>] exiting_irq arch/x86/include/asm/apic.h:669 [inline]
 [<ffffffff83a07561>] smp_apic_timer_interrupt+0x81/0xa0 arch/x86/kernel/apic/apic.c:962
 [<ffffffff83a036f0>] apic_timer_interrupt+0xa0/0xb0 arch/x86/entry/entry_64.S:648
 <EOI> [  181.769632]  [<ffffffff81f2110b>] ? check_preemption_disabled+0x3b/0x170 lib/smp_processor_id.c:51
 [<ffffffff8143c5db>] pagecache_get_page+0x4b/0x720 mm/filemap.c:1201
 [<ffffffff8143d6ac>] grab_cache_page_write_begin+0x6c/0xa0 mm/filemap.c:2697
 [<ffffffff8175b9ec>] ext4_da_write_begin+0x24c/0x1020 fs/ext4/inode.c:2958
 [<ffffffff814382c1>] generic_perform_write+0x301/0x510 mm/filemap.c:2753
 [<ffffffff8143fdd2>] __generic_file_write_iter+0x352/0x540 mm/filemap.c:2878
 [<ffffffff81732133>] ext4_file_write_iter+0x463/0xd90 fs/ext4/file.c:165
 [<ffffffff81574fe0>] vfs_iter_write+0x2e0/0x460 fs/read_write.c:390
 [<ffffffff8161c06b>] iter_file_splice_write+0x5fb/0xb30 fs/splice.c:768
 [<ffffffff816170d8>] do_splice_from fs/splice.c:870 [inline]
 [<ffffffff816170d8>] direct_splice_actor+0x128/0x190 fs/splice.c:1037
 [<ffffffff81618421>] splice_direct_to_actor+0x2c1/0x7e0 fs/splice.c:992
 [<ffffffff81618ae3>] do_splice_direct+0x1a3/0x270 fs/splice.c:1080
 [<ffffffff81579eb0>] do_sendfile+0x4f0/0xc60 fs/read_write.c:1393
 [<ffffffff8157bf31>] SYSC_sendfile64 fs/read_write.c:1448 [inline]
 [<ffffffff8157bf31>] SyS_sendfile64+0xd1/0x160 fs/read_write.c:1440
 [<ffffffff81006316>] do_syscall_64+0x1a6/0x490 arch/x86/entry/common.c:282
 [<ffffffff83a01d93>] 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 ffff8801cbe71540 by task syz-executor0/11193

CPU: 1 PID: 11193 Comm: syz-executor0 Tainted: G        W       4.9.123-g520d10d3 #29
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
 ffff8801db307cf8 ffffffff81eb9689 ffffea00072f9c00 ffff8801cbe71540
 0000000000000000 ffff8801cbe71540 ffff8801ccf62a58 ffff8801db307d30
 ffffffff8156c3fe ffff8801cbe71540 0000000000000004 0000000000000000
Call Trace:
 <IRQ> [  182.196942]  [<ffffffff81eb9689>] __dump_stack lib/dump_stack.c:15 [inline]
 <IRQ> [  182.196942]  [<ffffffff81eb9689>] dump_stack+0xc1/0x128 lib/dump_stack.c:51
 [<ffffffff8156c3fe>] print_address_description+0x6c/0x234 mm/kasan/report.c:256
 [<ffffffff8156c808>] kasan_report_error mm/kasan/report.c:355 [inline]
 [<ffffffff8156c808>] kasan_report.cold.6+0x242/0x2fe mm/kasan/report.c:412
 [<ffffffff8153fb74>] __asan_report_load4_noabort+0x14/0x20 mm/kasan/report.c:432
 [<ffffffff8342904c>] inet_shutdown+0x2dc/0x360 net/ipv4/af_inet.c:824
 [<ffffffff836cbac0>] pppol2tp_session_close+0xa0/0xe0 net/l2tp/l2tp_ppp.c:441
 [<ffffffff836c52f1>] l2tp_tunnel_closeall+0x231/0x350 net/l2tp/l2tp_core.c:1368
 [<ffffffff836c5b72>] l2tp_tunnel_destruct+0x2f2/0x590 net/l2tp/l2tp_core.c:1324
 [<ffffffff830281f5>] __sk_destruct+0x55/0x590 net/core/sock.c:1428
 [<ffffffff81289aae>] __rcu_reclaim kernel/rcu/rcu.h:118 [inline]
 [<ffffffff81289aae>] rcu_do_batch kernel/rcu/tree.c:2789 [inline]
 [<ffffffff81289aae>] invoke_rcu_callbacks kernel/rcu/tree.c:3053 [inline]
 [<ffffffff81289aae>] __rcu_process_callbacks kernel/rcu/tree.c:3020 [inline]
 [<ffffffff81289aae>] rcu_process_callbacks+0x8ae/0x12b0 kernel/rcu/tree.c:3037
 [<ffffffff83a08980>] __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
 [<ffffffff83a07561>] exiting_irq arch/x86/include/asm/apic.h:669 [inline]
 [<ffffffff83a07561>] smp_apic_timer_interrupt+0x81/0xa0 arch/x86/kernel/apic/apic.c:962
 [<ffffffff83a036f0>] apic_timer_interrupt+0xa0/0xb0 arch/x86/entry/entry_64.S:648
 <EOI> [  182.321816]  [<ffffffff81f2110b>] ? check_preemption_disabled+0x3b/0x170 lib/smp_processor_id.c:51
 [<ffffffff8143c5db>] pagecache_get_page+0x4b/0x720 mm/filemap.c:1201
 [<ffffffff8143d6ac>] grab_cache_page_write_begin+0x6c/0xa0 mm/filemap.c:2697
 [<ffffffff8175b9ec>] ext4_da_write_begin+0x24c/0x1020 fs/ext4/inode.c:2958
 [<ffffffff814382c1>] generic_perform_write+0x301/0x510 mm/filemap.c:2753
 [<ffffffff8143fdd2>] __generic_file_write_iter+0x352/0x540 mm/filemap.c:2878
 [<ffffffff81732133>] ext4_file_write_iter+0x463/0xd90 fs/ext4/file.c:165
 [<ffffffff81574fe0>] vfs_iter_write+0x2e0/0x460 fs/read_write.c:390
 [<ffffffff8161c06b>] iter_file_splice_write+0x5fb/0xb30 fs/splice.c:768
 [<ffffffff816170d8>] do_splice_from fs/splice.c:870 [inline]
 [<ffffffff816170d8>] direct_splice_actor+0x128/0x190 fs/splice.c:1037
 [<ffffffff81618421>] splice_direct_to_actor+0x2c1/0x7e0 fs/splice.c:992
 [<ffffffff81618ae3>] do_splice_direct+0x1a3/0x270 fs/splice.c:1080
 [<ffffffff81579eb0>] do_sendfile+0x4f0/0xc60 fs/read_write.c:1393
 [<ffffffff8157bf31>] SYSC_sendfile64 fs/read_write.c:1448 [inline]
 [<ffffffff8157bf31>] SyS_sendfile64+0xd1/0x160 fs/read_write.c:1440
 [<ffffffff81006316>] do_syscall_64+0x1a6/0x490 arch/x86/entry/common.c:282
 [<ffffffff83a01d93>] entry_SYSCALL_64_after_swapgs+0x5d/0xdb

Allocated by task 11243:
 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 11238:
 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 ffff8801cbe71540
 which belongs to the cache sock_inode_cache of size 960
The buggy address is located 0 bytes inside of
 960-byte region [ffff8801cbe71540, ffff8801cbe71900)
The buggy address belongs to the page:
page:ffffea00072f9c00 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:
 ffff8801cbe71400: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
 ffff8801cbe71480: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc
>ffff8801cbe71500: fc fc fc fc fc fc fc fc fb fb fb fb fb fb fb fb
                                           ^
 ffff8801cbe71580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
 ffff8801cbe71600: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
==================================================================