BUG: KASAN: use-after-free in list_empty include/linux/list.h:282 [inline]
BUG: KASAN: use-after-free in waitqueue_active include/linux/wait.h:127 [inline]
BUG: KASAN: use-after-free in wq_has_sleeper include/linux/wait.h:161 [inline]
BUG: KASAN: use-after-free in skwq_has_sleeper include/net/sock.h:2147 [inline]
BUG: KASAN: use-after-free in sock_def_write_space+0x609/0x630 net/core/sock.c:2947
Read of size 8 at addr ffff888023c585c0 by task syz-executor.0/13162

CPU: 2 PID: 13162 Comm: syz-executor.0 Not tainted 5.8.0-syzkaller #0
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS rel-1.12.0-59-gc9ba5276e321-prebuilt.qemu.org 04/01/2014
Call Trace:
 __dump_stack lib/dump_stack.c:77 [inline]
 dump_stack+0x18f/0x20d lib/dump_stack.c:118
 print_address_description.constprop.0.cold+0xae/0x436 mm/kasan/report.c:383
 __kasan_report mm/kasan/report.c:513 [inline]
 kasan_report.cold+0x1f/0x37 mm/kasan/report.c:530
 list_empty include/linux/list.h:282 [inline]
 waitqueue_active include/linux/wait.h:127 [inline]
 wq_has_sleeper include/linux/wait.h:161 [inline]
 skwq_has_sleeper include/net/sock.h:2147 [inline]
 sock_def_write_space+0x609/0x630 net/core/sock.c:2947
 sock_wfree+0x1cc/0x240 net/core/sock.c:2060
 skb_release_head_state+0x9f/0x250 net/core/skbuff.c:651
 skb_release_all net/core/skbuff.c:662 [inline]
 __kfree_skb net/core/skbuff.c:678 [inline]
 consume_skb net/core/skbuff.c:837 [inline]
 consume_skb+0x89/0x160 net/core/skbuff.c:831
 __dev_kfree_skb_any+0x9c/0xc0 net/core/dev.c:3101
 dev_consume_skb_any include/linux/netdevice.h:3740 [inline]
 napi_consume_skb+0x24f/0x370 net/core/skbuff.c:901
 free_old_xmit_skbs+0xd5/0x230 drivers/net/virtio_net.c:1389
 start_xmit+0x123/0x15f0 drivers/net/virtio_net.c:1585
 __netdev_start_xmit include/linux/netdevice.h:4613 [inline]
 netdev_start_xmit include/linux/netdevice.h:4627 [inline]
 xmit_one net/core/dev.c:3556 [inline]
 dev_hard_start_xmit+0x193/0x950 net/core/dev.c:3572
 sch_direct_xmit+0x2e1/0xbd0 net/sched/sch_generic.c:313
 qdisc_restart net/sched/sch_generic.c:376 [inline]
 __qdisc_run+0x4b9/0x1620 net/sched/sch_generic.c:384
 qdisc_run include/net/pkt_sched.h:134 [inline]
 qdisc_run include/net/pkt_sched.h:126 [inline]
 __dev_xmit_skb net/core/dev.c:3747 [inline]
 __dev_queue_xmit+0x1456/0x2d60 net/core/dev.c:4100
 llc_sap_action_send_xid_c+0x2c8/0x380 net/llc/llc_s_ac.c:88
 llc_exec_sap_trans_actions net/llc/llc_sap.c:152 [inline]
 llc_sap_next_state net/llc/llc_sap.c:181 [inline]
 llc_sap_state_process+0x220/0x4e0 net/llc/llc_sap.c:208
 llc_ui_sendmsg+0x9e9/0x1000 net/llc/af_llc.c:964
 sock_sendmsg_nosec net/socket.c:652 [inline]
 sock_sendmsg+0xcf/0x120 net/socket.c:672
 ____sys_sendmsg+0x331/0x810 net/socket.c:2352
 ___sys_sendmsg+0xf3/0x170 net/socket.c:2406
 __sys_sendmmsg+0x195/0x480 net/socket.c:2496
 __do_sys_sendmmsg net/socket.c:2525 [inline]
 __se_sys_sendmmsg net/socket.c:2522 [inline]
 __x64_sys_sendmmsg+0x99/0x100 net/socket.c:2522
 do_syscall_64+0x2d/0x70 arch/x86/entry/common.c:46
 entry_SYSCALL_64_after_hwframe+0x44/0xa9
RIP: 0033:0x45d469
Code: 9d af 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 6b af fb ff c3 66 2e 0f 1f 84 00 00 00 00
RSP: 002b:00007f0a6e731c88 EFLAGS: 00000246 ORIG_RAX: 0000000000000133
RAX: ffffffffffffffda RBX: 0000000000717bc0 RCX: 000000000045d469
RDX: 03fffffffffffeed RSI: 0000000020001380 RDI: 0000000000000004
RBP: 00000000004aa3e7 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 000000000075cf00
R13: 00007ffdf8e30ccf R14: 00007f0a6e712000 R15: 0000000000000003

Allocated by task 13063:
 save_stack+0x1b/0x40 mm/kasan/common.c:48
 set_track mm/kasan/common.c:56 [inline]
 __kasan_kmalloc.constprop.0+0xc2/0xd0 mm/kasan/common.c:494
 slab_post_alloc_hook mm/slab.h:586 [inline]
 slab_alloc mm/slab.c:3320 [inline]
 kmem_cache_alloc+0x12c/0x3b0 mm/slab.c:3484
 sock_alloc_inode+0x18/0x1c0 net/socket.c:253
 alloc_inode+0x61/0x230 fs/inode.c:232
 new_inode_pseudo+0x14/0xe0 fs/inode.c:928
 sock_alloc+0x3c/0x260 net/socket.c:573
 __sock_create+0xb9/0x740 net/socket.c:1392
 sock_create net/socket.c:1479 [inline]
 __sys_socket+0xef/0x200 net/socket.c:1521
 __do_sys_socket net/socket.c:1530 [inline]
 __se_sys_socket net/socket.c:1528 [inline]
 __x64_sys_socket+0x6f/0xb0 net/socket.c:1528
 do_syscall_64+0x2d/0x70 arch/x86/entry/common.c:46
 entry_SYSCALL_64_after_hwframe+0x44/0xa9

Freed by task 11253:
 save_stack+0x1b/0x40 mm/kasan/common.c:48
 set_track mm/kasan/common.c:56 [inline]
 kasan_set_free_info mm/kasan/common.c:316 [inline]
 __kasan_slab_free+0xf5/0x140 mm/kasan/common.c:455
 __cache_free mm/slab.c:3426 [inline]
 kmem_cache_free+0x7f/0x310 mm/slab.c:3694
 i_callback+0x3f/0x70 fs/inode.c:221
 rcu_do_batch kernel/rcu/tree.c:2427 [inline]
 rcu_core+0x5c7/0x1190 kernel/rcu/tree.c:2655
 __do_softirq+0x2de/0xa24 kernel/softirq.c:298

The buggy address belongs to the object at ffff888023c58540
 which belongs to the cache sock_inode_cache(17:syz1) of size 1216
The buggy address is located 128 bytes inside of
 1216-byte region [ffff888023c58540, ffff888023c58a00)
The buggy address belongs to the page:
page:ffffea00008f1600 refcount:1 mapcount:0 mapping:0000000000000000 index:0xffff888023c58ffd
flags: 0xfffe0000000200(slab)
raw: 00fffe0000000200 ffffea000080ce48 ffffea00006ed708 ffff888027b94000
raw: ffff888023c58ffd ffff888023c58000 0000000100000003 0000000000000000
page dumped because: kasan: bad access detected

Memory state around the buggy address:
 ffff888023c58480: 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc
 ffff888023c58500: fc fc fc fc fc fc fc fc fb fb fb fb fb fb fb fb
>ffff888023c58580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
                                           ^
 ffff888023c58600: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
 ffff888023c58680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
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