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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:2794
Read of size 8 at addr ffff888095667ab8 by task syz-executor.0/22075

CPU: 0 PID: 22075 Comm: syz-executor.0 Not tainted 5.3.0-rc2+ #91
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+0x172/0x1f0 lib/dump_stack.c:113
 print_address_description.cold+0xd4/0x306 mm/kasan/report.c:351
 __kasan_report.cold+0x1b/0x36 mm/kasan/report.c:482
 kasan_report+0x12/0x17 mm/kasan/common.c:612
 __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:2794
 sock_wfree+0x154/0x190 net/core/sock.c:1950
 skb_release_head_state+0xeb/0x250 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:6347 [inline]
 net_rx_action+0x4d6/0x1030 net/core/dev.c:6413
 __do_softirq+0x262/0x98c kernel/softirq.c:292
 invoke_softirq kernel/softirq.c:373 [inline]
 irq_exit+0x19b/0x1e0 kernel/softirq.c:413
 exiting_irq arch/x86/include/asm/apic.h:537 [inline]
 do_IRQ+0x12c/0x200 arch/x86/kernel/irq.c:259
 common_interrupt+0xf/0xf arch/x86/entry/entry_64.S:605
 </IRQ>
RIP: 0010:vcpu_enter_guest+0xc9e/0x5eb0 arch/x86/kvm/x86.c:8054
Code: ff df 48 c1 ea 03 80 3c 02 00 0f 85 f6 49 00 00 48 83 3d 04 f8 c5 07 00 0f 84 9b 3d 00 00 e8 49 a5 65 00 fb 66 0f 1f 44 00 00 <49> 8d bf 68 01 00 00 48 b8 00 00 00 00 00 fc ff df 48 89 fa 48 c1
RSP: 0018:ffff88806629fa10 EFLAGS: 00000246 ORIG_RAX: ffffffffffffffd6
RAX: 0000000000040000 RBX: ffffffff88d2f220 RCX: ffffc90005f4d000
RDX: 0000000000040000 RSI: ffffffff810cfa27 RDI: ffffffff810cf9f9
RBP: ffff88806629fb20 R08: ffff88805e002280 R09: ffffed1011646502
R10: ffffed1011646501 R11: ffff88808b23280f R12: ffff88805f390f2c
R13: ffff88805f390f30 R14: 0000000000000000 R15: ffff88805f390f00
 vcpu_run arch/x86/kvm/x86.c:8151 [inline]
 kvm_arch_vcpu_ioctl_run+0x464/0x1790 arch/x86/kvm/x86.c:8359
 kvm_vcpu_ioctl+0x4dc/0xfc0 arch/x86/kvm/../../../virt/kvm/kvm_main.c:2754
 vfs_ioctl fs/ioctl.c:46 [inline]
 file_ioctl fs/ioctl.c:509 [inline]
 do_vfs_ioctl+0xdb6/0x13e0 fs/ioctl.c:696
 ksys_ioctl+0xab/0xd0 fs/ioctl.c:713
 __do_sys_ioctl fs/ioctl.c:720 [inline]
 __se_sys_ioctl fs/ioctl.c:718 [inline]
 __x64_sys_ioctl+0x73/0xb0 fs/ioctl.c:718
 do_syscall_64+0xfd/0x6a0 arch/x86/entry/common.c:296
 entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x459829
Code: fd 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 cb b7 fb ff c3 66 2e 0f 1f 84 00 00 00 00
RSP: 002b:00007f477ba99c78 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 0000000000459829
RDX: 0000000000000000 RSI: 000000000000ae80 RDI: 0000000000000006
RBP: 000000000075bf20 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00007f477ba9a6d4
R13: 00000000004c2bcf R14: 00000000004d6150 R15: 00000000ffffffff

Allocated by task 22079:
 save_stack+0x23/0x90 mm/kasan/common.c:69
 set_track mm/kasan/common.c:77 [inline]
 __kasan_kmalloc mm/kasan/common.c:487 [inline]
 __kasan_kmalloc.constprop.0+0xcf/0xe0 mm/kasan/common.c:460
 kasan_slab_alloc+0xf/0x20 mm/kasan/common.c:495
 slab_post_alloc_hook mm/slab.h:520 [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:227
 new_inode_pseudo+0x19/0xf0 fs/inode.c:916
 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+0xfd/0x6a0 arch/x86/entry/common.c:296
 entry_SYSCALL_64_after_hwframe+0x49/0xbe

Freed by task 9:
 save_stack+0x23/0x90 mm/kasan/common.c:69
 set_track mm/kasan/common.c:77 [inline]
 __kasan_slab_free+0x102/0x150 mm/kasan/common.c:449
 kasan_slab_free+0xe/0x10 mm/kasan/common.c:457
 __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:216
 __rcu_reclaim kernel/rcu/rcu.h:222 [inline]
 rcu_do_batch kernel/rcu/tree.c:2114 [inline]
 rcu_core+0x67f/0x1580 kernel/rcu/tree.c:2314
 rcu_core_si+0x9/0x10 kernel/rcu/tree.c:2323
 __do_softirq+0x262/0x98c kernel/softirq.c:292

The buggy address belongs to the object at ffff888095667a40
 which belongs to the cache sock_inode_cache(49:syz3) of size 1152
The buggy address is located 120 bytes inside of
 1152-byte region [ffff888095667a40, ffff888095667ec0)
The buggy address belongs to the page:
page:ffffea00025599c0 refcount:1 mapcount:0 mapping:ffff8880949628c0 index:0xffff888095667ffd
flags: 0x1fffc0000000200(slab)
raw: 01fffc0000000200 ffffea00025517c8 ffffea00024b00c8 ffff8880949628c0
raw: ffff888095667ffd ffff888095667040 0000000100000003 0000000000000000
page dumped because: kasan: bad access detected

Memory state around the buggy address:
 ffff888095667980: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc
 ffff888095667a00: fc fc fc fc fc fc fc fc fb fb fb fb fb fb fb fb
>ffff888095667a80: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
                                        ^
 ffff888095667b00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
 ffff888095667b80: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
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