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BUG: KASAN: use-after-free in __read_once_size include/linux/compiler.h:199 [inline]
BUG: KASAN: use-after-free in list_empty include/linux/list.h:268 [inline]
BUG: KASAN: use-after-free in waitqueue_active include/linux/wait.h:126 [inline]
BUG: KASAN: use-after-free in wq_has_sleeper include/linux/wait.h:160 [inline]
BUG: KASAN: use-after-free in skwq_has_sleeper include/net/sock.h:2088 [inline]
BUG: KASAN: use-after-free in sock_def_write_space+0x651/0x680 net/core/sock.c:2811
Read of size 8 at addr ffff888095dbba78 by task kworker/u4:9/8910

CPU: 1 PID: 8910 Comm: kworker/u4:9 Not tainted 5.4.0-rc1+ #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Workqueue: bat_events batadv_nc_worker
Call Trace:
 <IRQ>
 __dump_stack lib/dump_stack.c:77 [inline]
 dump_stack+0x172/0x1f0 lib/dump_stack.c:113
 print_address_description.constprop.0.cold+0xd4/0x30b mm/kasan/report.c:374
 __kasan_report.cold+0x1b/0x41 mm/kasan/report.c:506
 kasan_report+0x12/0x20 mm/kasan/common.c:634
 __asan_report_load8_noabort+0x14/0x20 mm/kasan/generic_report.c:132
 __read_once_size include/linux/compiler.h:199 [inline]
 list_empty include/linux/list.h:268 [inline]
 waitqueue_active include/linux/wait.h:126 [inline]
 wq_has_sleeper include/linux/wait.h:160 [inline]
 skwq_has_sleeper include/net/sock.h:2088 [inline]
 sock_def_write_space+0x651/0x680 net/core/sock.c:2811
 sock_wfree+0x150/0x190 net/core/sock.c:1958
 skb_release_head_state+0xeb/0x260 net/core/skbuff.c:652
 skb_release_all+0x16/0x60 net/core/skbuff.c:663
 _kfree_skb_defer net/core/skbuff.c:873 [inline]
 napi_consume_skb+0x19d/0x580 net/core/skbuff.c:918
 free_old_xmit_skbs+0xee/0x250 drivers/net/virtio_net.c:1366
 virtnet_poll_tx+0x214/0x3a0 drivers/net/virtio_net.c:1493
 napi_poll net/core/dev.c:6392 [inline]
 net_rx_action+0x508/0x1120 net/core/dev.c:6460
 __do_softirq+0x262/0x98c kernel/softirq.c:292
 do_softirq_own_stack+0x2a/0x40 arch/x86/entry/entry_64.S:1082
 </IRQ>
 do_softirq.part.0+0x11a/0x170 kernel/softirq.c:337
 do_softirq kernel/softirq.c:329 [inline]
 __local_bh_enable_ip+0x211/0x270 kernel/softirq.c:189
 __raw_spin_unlock_bh include/linux/spinlock_api_smp.h:176 [inline]
 _raw_spin_unlock_bh+0x31/0x40 kernel/locking/spinlock.c:207
 spin_unlock_bh include/linux/spinlock.h:383 [inline]
 batadv_nc_purge_paths+0x265/0x370 net/batman-adv/network-coding.c:470
 batadv_nc_worker+0x29c/0x760 net/batman-adv/network-coding.c:719
 process_one_work+0x9af/0x1740 kernel/workqueue.c:2269
 worker_thread+0x98/0xe40 kernel/workqueue.c:2415
 kthread+0x361/0x430 kernel/kthread.c:255
 ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:352

Allocated by task 13109:
 save_stack+0x23/0x90 mm/kasan/common.c:69
 set_track mm/kasan/common.c:77 [inline]
 __kasan_kmalloc mm/kasan/common.c:510 [inline]
 __kasan_kmalloc.constprop.0+0xcf/0xe0 mm/kasan/common.c:483
 kasan_slab_alloc+0xf/0x20 mm/kasan/common.c:518
 slab_post_alloc_hook mm/slab.h:584 [inline]
 slab_alloc mm/slab.c:3319 [inline]
 kmem_cache_alloc+0x121/0x710 mm/slab.c:3483
 sock_alloc_inode+0x1c/0x1d0 net/socket.c:239
 alloc_inode+0x68/0x1e0 fs/inode.c:230
 new_inode_pseudo+0x19/0xf0 fs/inode.c:919
 sock_alloc+0x41/0x270 net/socket.c:558
 __sock_create+0xc2/0x730 net/socket.c:1382
 sock_create net/socket.c:1469 [inline]
 __sys_socket+0x103/0x220 net/socket.c:1511
 __do_sys_socket net/socket.c:1520 [inline]
 __se_sys_socket net/socket.c:1518 [inline]
 __x64_sys_socket+0x73/0xb0 net/socket.c:1518
 do_syscall_64+0xfa/0x760 arch/x86/entry/common.c:290
 entry_SYSCALL_64_after_hwframe+0x49/0xbe

Freed by task 0:
 save_stack+0x23/0x90 mm/kasan/common.c:69
 set_track mm/kasan/common.c:77 [inline]
 kasan_set_free_info mm/kasan/common.c:332 [inline]
 __kasan_slab_free+0x102/0x150 mm/kasan/common.c:471
 kasan_slab_free+0xe/0x10 mm/kasan/common.c:480
 __cache_free mm/slab.c:3425 [inline]
 kmem_cache_free+0x86/0x320 mm/slab.c:3693
 sock_free_inode+0x20/0x30 net/socket.c:260
 i_callback+0x44/0x80 fs/inode.c:219
 __rcu_reclaim kernel/rcu/rcu.h:222 [inline]
 rcu_do_batch kernel/rcu/tree.c:2157 [inline]
 rcu_core+0x581/0x1560 kernel/rcu/tree.c:2377
 rcu_core_si+0x9/0x10 kernel/rcu/tree.c:2386
 __do_softirq+0x262/0x98c kernel/softirq.c:292

The buggy address belongs to the object at ffff888095dbba00
 which belongs to the cache sock_inode_cache(65:syz3) of size 1152
The buggy address is located 120 bytes inside of
 1152-byte region [ffff888095dbba00, ffff888095dbbe80)
The buggy address belongs to the page:
page:ffffea0002576ec0 refcount:1 mapcount:0 mapping:ffff88809a59d540 index:0xffff888095dbbffd
flags: 0x1fffc0000000200(slab)
raw: 01fffc0000000200 ffffea00028b9b48 ffffea0002576748 ffff88809a59d540
raw: ffff888095dbbffd ffff888095dbb000 0000000100000003 0000000000000000
page dumped because: kasan: bad access detected

Memory state around the buggy address:
 ffff888095dbb900: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
 ffff888095dbb980: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
>ffff888095dbba00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
                                                                ^
 ffff888095dbba80: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
 ffff888095dbbb00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
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