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BUG: KASAN: use-after-free in __read_once_size include/linux/compiler.h:193 [inline]
BUG: KASAN: use-after-free in dev_queue_xmit_nit+0x87e/0xa20 net/core/dev.c:2004
Read of size 8 at addr ffff88804cd25d70 by task syz-executor.5/17798

CPU: 0 PID: 17798 Comm: syz-executor.5 Not tainted 4.19.143-syzkaller #0
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+0x1fc/0x2fe lib/dump_stack.c:118
 print_address_description.cold+0x54/0x219 mm/kasan/report.c:256
 kasan_report_error.cold+0x8a/0x1c7 mm/kasan/report.c:354
 kasan_report mm/kasan/report.c:412 [inline]
 __asan_report_load8_noabort+0x88/0x90 mm/kasan/report.c:433
 __read_once_size include/linux/compiler.h:193 [inline]
 dev_queue_xmit_nit+0x87e/0xa20 net/core/dev.c:2004
 xmit_one net/core/dev.c:3252 [inline]
 dev_hard_start_xmit+0xaa/0x920 net/core/dev.c:3272
 sch_direct_xmit+0x2d6/0xf50 net/sched/sch_generic.c:332
 qdisc_restart net/sched/sch_generic.c:395 [inline]
 __qdisc_run+0x4d0/0x1630 net/sched/sch_generic.c:403
 qdisc_run include/net/pkt_sched.h:120 [inline]
 __dev_xmit_skb net/core/dev.c:3451 [inline]
 __dev_queue_xmit+0x2102/0x2e00 net/core/dev.c:3807
 neigh_hh_output include/net/neighbour.h:491 [inline]
 neigh_output include/net/neighbour.h:499 [inline]
 ip_finish_output2+0xb6d/0x1540 net/ipv4/ip_output.c:229
 ip_finish_output+0x84d/0xcd0 net/ipv4/ip_output.c:317
 NF_HOOK_COND include/linux/netfilter.h:278 [inline]
 ip_output+0x203/0x5f0 net/ipv4/ip_output.c:405
 dst_output include/net/dst.h:455 [inline]
 ip_local_out+0xaf/0x170 net/ipv4/ip_output.c:124
 __ip_queue_xmit+0x866/0x1b50 net/ipv4/ip_output.c:505
 __tcp_transmit_skb+0x1bb2/0x33f0 net/ipv4/tcp_output.c:1148
 __tcp_send_ack.part.0+0x3d9/0x5c0 net/ipv4/tcp_output.c:3640
 __tcp_send_ack net/ipv4/tcp_output.c:3646 [inline]
 tcp_send_ack+0x7d/0xa0 net/ipv4/tcp_output.c:3646
 __tcp_ack_snd_check+0x152/0x890 net/ipv4/tcp_input.c:5205
 tcp_ack_snd_check net/ipv4/tcp_input.c:5251 [inline]
 tcp_rcv_established+0x96d/0x1e20 net/ipv4/tcp_input.c:5672
 tcp_v4_do_rcv+0x5d6/0x870 net/ipv4/tcp_ipv4.c:1544
 tcp_v4_rcv+0x2c03/0x3b80 net/ipv4/tcp_ipv4.c:1829
 ip_local_deliver_finish+0x495/0xc00 net/ipv4/ip_input.c:215
 NF_HOOK include/linux/netfilter.h:289 [inline]
 ip_local_deliver+0x188/0x500 net/ipv4/ip_input.c:256
 dst_input include/net/dst.h:461 [inline]
 ip_rcv_finish+0x1ca/0x2e0 net/ipv4/ip_input.c:414
 NF_HOOK include/linux/netfilter.h:289 [inline]
 ip_rcv+0xca/0x3c0 net/ipv4/ip_input.c:524
 __netif_receive_skb_one_core+0x114/0x180 net/core/dev.c:4954
 __netif_receive_skb+0x27/0x1c0 net/core/dev.c:5066
 netif_receive_skb_internal+0xf0/0x3f0 net/core/dev.c:5156
 napi_skb_finish net/core/dev.c:5600 [inline]
 napi_gro_receive+0x2e6/0x450 net/core/dev.c:5631
 receive_buf+0xefc/0x5e50 drivers/net/virtio_net.c:1072
 virtnet_receive drivers/net/virtio_net.c:1336 [inline]
 virtnet_poll+0x568/0xd70 drivers/net/virtio_net.c:1441
 napi_poll net/core/dev.c:6271 [inline]
 net_rx_action+0x4ac/0xfb0 net/core/dev.c:6337
 __do_softirq+0x26c/0x9a0 kernel/softirq.c:292
 invoke_softirq kernel/softirq.c:372 [inline]
 irq_exit+0x215/0x260 kernel/softirq.c:412
 exiting_irq arch/x86/include/asm/apic.h:544 [inline]
 do_IRQ+0x10c/0x1c0 arch/x86/kernel/irq.c:258
 common_interrupt+0xf/0xf arch/x86/entry/entry_64.S:670
 </IRQ>
RIP: 0010:__rcu_read_unlock+0x104/0x160 kernel/rcu/tree_plugin.h:430
Code: d2 75 62 8b 83 74 03 00 00 85 c0 75 69 48 b8 00 00 00 00 00 fc ff df 48 89 ea 48 c1 ea 03 0f b6 04 02 84 c0 74 04 3c 03 7e 42 <c7> 83 70 03 00 00 00 00 00 00 e9 34 ff ff ff 0f 0b 5b 5d c3 48 89
RSP: 0018:ffff888047c87700 EFLAGS: 00000246 ORIG_RAX: ffffffffffffffd7
RAX: 0000000000000000 RBX: ffff88803c440100 RCX: ffffc90010623000
RDX: 1ffff1100788808e RSI: ffffffff841a2a0b RDI: ffff88803c440474
RBP: ffff88803c440470 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000001 R11: 0000000000000000 R12: ffffea0000c25840
R13: 0000000000000d4f R14: ffff8882196d3700 R15: 0000000000000e00
 rcu_read_unlock include/linux/rcupdate.h:680 [inline]
 brd_lookup_page+0xc0/0x1d0 drivers/block/brd.c:74
 brd_insert_page drivers/block/brd.c:92 [inline]
 copy_to_brd_setup drivers/block/brd.c:172 [inline]
 brd_do_bvec+0x66/0x6d0 drivers/block/brd.c:259
 brd_make_request+0x2c6/0x5e1 drivers/block/brd.c:293
 generic_make_request+0x613/0xdf0 block/blk-core.c:2464
 submit_bio+0xb1/0x430 block/blk-core.c:2573
 __blkdev_direct_IO fs/block_dev.c:409 [inline]
 blkdev_direct_IO+0x633/0xf60 fs/block_dev.c:448
 generic_file_direct_write+0x208/0x4a0 mm/filemap.c:3065
 __generic_file_write_iter+0x2d0/0x610 mm/filemap.c:3244
 blkdev_write_iter+0x22b/0x430 fs/block_dev.c:1929
 call_write_iter include/linux/fs.h:1821 [inline]
 new_sync_write fs/read_write.c:474 [inline]
 __vfs_write+0x51b/0x770 fs/read_write.c:487
 vfs_write+0x1f3/0x540 fs/read_write.c:549
 ksys_write+0x12b/0x2a0 fs/read_write.c:599
 do_syscall_64+0xf9/0x620 arch/x86/entry/common.c:293
 entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x45d5b9
Code: 5d b4 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 2b b4 fb ff c3 66 2e 0f 1f 84 00 00 00 00
RSP: 002b:00007fb185790c78 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 0000000000036780 RCX: 000000000045d5b9
RDX: 0000000000800000 RSI: 0000000020004200 RDI: 0000000000000005
RBP: 000000000118cf80 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 000000000118cf4c
R13: 00007fffde3fe17f R14: 00007fb1857919c0 R15: 000000000118cf4c

Allocated by task 17820:
 __do_kmalloc mm/slab.c:3727 [inline]
 __kmalloc+0x15a/0x3c0 mm/slab.c:3736
 kmalloc include/linux/slab.h:520 [inline]
 sk_prot_alloc+0x1e2/0x2d0 net/core/sock.c:1466
 sk_alloc+0x36/0xec0 net/core/sock.c:1520
 packet_create+0x117/0x850 net/packet/af_packet.c:3252
 __sock_create+0x3d8/0x740 net/socket.c:1276
 sock_create net/socket.c:1316 [inline]
 __sys_socket+0xef/0x200 net/socket.c:1346
 __do_sys_socket net/socket.c:1355 [inline]
 __se_sys_socket net/socket.c:1353 [inline]
 __x64_sys_socket+0x6f/0xb0 net/socket.c:1353
 do_syscall_64+0xf9/0x620 arch/x86/entry/common.c:293
 entry_SYSCALL_64_after_hwframe+0x49/0xbe

Freed by task 17816:
 __cache_free mm/slab.c:3503 [inline]
 kfree+0xcc/0x210 mm/slab.c:3822
 sk_prot_free net/core/sock.c:1503 [inline]
 __sk_destruct+0x5ff/0x810 net/core/sock.c:1584
 sk_destruct net/core/sock.c:1599 [inline]
 __sk_free+0x165/0x3b0 net/core/sock.c:1610
 sk_free+0x3b/0x50 net/core/sock.c:1621
 sock_put include/net/sock.h:1711 [inline]
 packet_release+0x890/0xb70 net/packet/af_packet.c:3081
 __sock_release+0xcd/0x2a0 net/socket.c:579
 sock_close+0x15/0x20 net/socket.c:1140
 __fput+0x2ce/0x890 fs/file_table.c:278
 task_work_run+0x148/0x1c0 kernel/task_work.c:113
 tracehook_notify_resume include/linux/tracehook.h:193 [inline]
 exit_to_usermode_loop+0x251/0x2a0 arch/x86/entry/common.c:167
 prepare_exit_to_usermode arch/x86/entry/common.c:198 [inline]
 syscall_return_slowpath arch/x86/entry/common.c:271 [inline]
 do_syscall_64+0x538/0x620 arch/x86/entry/common.c:296
 entry_SYSCALL_64_after_hwframe+0x49/0xbe

The buggy address belongs to the object at ffff88804cd25580
 which belongs to the cache kmalloc-2048 of size 2048
The buggy address is located 2032 bytes inside of
 2048-byte region [ffff88804cd25580, ffff88804cd25d80)
The buggy address belongs to the page:
page:ffffea0001334900 count:1 mapcount:0 mapping:ffff88812c39cc40 index:0x0 compound_mapcount: 0
flags: 0xfffe0000008100(slab|head)
raw: 00fffe0000008100 ffffea0002949288 ffffea0002589908 ffff88812c39cc40
raw: 0000000000000000 ffff88804cd24480 0000000100000003 0000000000000000
page dumped because: kasan: bad access detected

Memory state around the buggy address:
 ffff88804cd25c00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
 ffff88804cd25c80: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
>ffff88804cd25d00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
                                                             ^
 ffff88804cd25d80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
 ffff88804cd25e00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
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