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BUG: KASAN: use-after-free in instrument_atomic_read include/linux/instrumented.h:71 [inline]
BUG: KASAN: use-after-free in atomic_read include/linux/atomic/atomic-instrumented.h:27 [inline]
BUG: KASAN: use-after-free in refcount_read include/linux/refcount.h:147 [inline]
BUG: KASAN: use-after-free in skb_unref include/linux/skbuff.h:1076 [inline]
BUG: KASAN: use-after-free in consume_skb+0x27/0x110 net/core/skbuff.c:908
Read of size 4 at addr ffff88807c7e249c by task kworker/0:5/7743

CPU: 0 PID: 7743 Comm: kworker/0:5 Not tainted 5.16.0-rc1-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Workqueue: events bpf_map_free_deferred
Call Trace:
 <TASK>
 __dump_stack lib/dump_stack.c:88 [inline]
 dump_stack_lvl+0x1dc/0x2d8 lib/dump_stack.c:106
 print_address_description+0x65/0x380 mm/kasan/report.c:247
 __kasan_report mm/kasan/report.c:433 [inline]
 kasan_report+0x19a/0x1f0 mm/kasan/report.c:450
 kasan_check_range+0x2b5/0x2f0 mm/kasan/generic.c:189
 instrument_atomic_read include/linux/instrumented.h:71 [inline]
 atomic_read include/linux/atomic/atomic-instrumented.h:27 [inline]
 refcount_read include/linux/refcount.h:147 [inline]
 skb_unref include/linux/skbuff.h:1076 [inline]
 consume_skb+0x27/0x110 net/core/skbuff.c:908
 __sk_msg_free+0x788/0x820 net/core/skmsg.c:196
 sk_msg_free net/core/skmsg.c:209 [inline]
 __sk_psock_purge_ingress_msg net/core/skmsg.c:748 [inline]
 __sk_psock_zap_ingress net/core/skmsg.c:766 [inline]
 sk_psock_stop+0x3f5/0x4a0 net/core/skmsg.c:784
 sk_psock_drop+0x21f/0x330 net/core/skmsg.c:826
 sock_hash_free+0x535/0x810 net/core/sock_map.c:1141
 process_one_work+0x853/0x1140 kernel/workqueue.c:2298
 worker_thread+0xac1/0x1320 kernel/workqueue.c:2445
 kthread+0x468/0x490 kernel/kthread.c:327
 ret_from_fork+0x1f/0x30
 </TASK>

Allocated by task 15530:
 kasan_save_stack mm/kasan/common.c:38 [inline]
 kasan_set_track mm/kasan/common.c:46 [inline]
 set_alloc_info mm/kasan/common.c:434 [inline]
 __kasan_slab_alloc+0xb6/0xf0 mm/kasan/common.c:467
 kasan_slab_alloc include/linux/kasan.h:259 [inline]
 slab_post_alloc_hook mm/slab.h:519 [inline]
 slab_alloc_node mm/slub.c:3234 [inline]
 slab_alloc mm/slub.c:3242 [inline]
 kmem_cache_alloc+0x1c9/0x310 mm/slub.c:3247
 skb_clone+0x1b4/0x360 net/core/skbuff.c:1521
 sk_psock_verdict_recv+0x68/0x640 net/core/skmsg.c:1157
 unix_read_sock+0x130/0x370 net/unix/af_unix.c:2420
 sk_psock_verdict_data_ready+0x166/0x1e0 net/core/skmsg.c:1200
 unix_dgram_sendmsg+0x19cc/0x2a50 net/unix/af_unix.c:1941
 sock_sendmsg_nosec net/socket.c:704 [inline]
 sock_sendmsg net/socket.c:724 [inline]
 ____sys_sendmsg+0x5b9/0x910 net/socket.c:2409
 ___sys_sendmsg net/socket.c:2463 [inline]
 __sys_sendmmsg+0x3ba/0x750 net/socket.c:2549
 __do_sys_sendmmsg net/socket.c:2578 [inline]
 __se_sys_sendmmsg net/socket.c:2575 [inline]
 __x64_sys_sendmmsg+0x9c/0xb0 net/socket.c:2575
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x44/0xd0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x44/0xae

Freed by task 7850:
 kasan_save_stack mm/kasan/common.c:38 [inline]
 kasan_set_track+0x4c/0x80 mm/kasan/common.c:46
 kasan_set_free_info+0x1f/0x40 mm/kasan/generic.c:370
 ____kasan_slab_free+0x10d/0x150 mm/kasan/common.c:366
 kasan_slab_free include/linux/kasan.h:235 [inline]
 slab_free_hook mm/slub.c:1723 [inline]
 slab_free_freelist_hook+0x12e/0x1a0 mm/slub.c:1749
 slab_free mm/slub.c:3513 [inline]
 kmem_cache_free+0x95/0x190 mm/slub.c:3529
 sock_drop include/linux/skmsg.h:310 [inline]
 sk_psock_backlog+0xf98/0x1130 net/core/skmsg.c:668
 process_one_work+0x853/0x1140 kernel/workqueue.c:2298
 worker_thread+0xac1/0x1320 kernel/workqueue.c:2445
 kthread+0x468/0x490 kernel/kthread.c:327
 ret_from_fork+0x1f/0x30

The buggy address belongs to the object at ffff88807c7e23c0
 which belongs to the cache skbuff_head_cache of size 232
The buggy address is located 220 bytes inside of
 232-byte region [ffff88807c7e23c0, ffff88807c7e24a8)
The buggy address belongs to the page:
page:ffffea0001f1f880 refcount:1 mapcount:0 mapping:0000000000000000 index:0xffff88807c7e2280 pfn:0x7c7e2
flags: 0xfff00000000200(slab|node=0|zone=1|lastcpupid=0x7ff)
raw: 00fff00000000200 ffffea0000d41348 ffffea0001f91b08 ffff888016387640
raw: ffff88807c7e2280 00000000000c000a 00000001ffffffff 0000000000000000
page dumped because: kasan: bad access detected
page_owner tracks the page as allocated
page last allocated via order 0, migratetype Unmovable, gfp_mask 0x12a20(GFP_ATOMIC|__GFP_NOWARN|__GFP_NORETRY), pid 6486, ts 104026521819, free_ts 96851049602
 prep_new_page mm/page_alloc.c:2418 [inline]
 get_page_from_freelist+0x729/0x9e0 mm/page_alloc.c:4149
 __alloc_pages+0x255/0x580 mm/page_alloc.c:5369
 alloc_slab_page mm/slub.c:1793 [inline]
 allocate_slab+0xcc/0x4d0 mm/slub.c:1930
 new_slab mm/slub.c:1993 [inline]
 ___slab_alloc+0x41e/0xc40 mm/slub.c:3022
 kmem_cache_alloc_bulk+0x1ed/0x590 mm/slub.c:3706
 napi_skb_cache_get+0x113/0x1e0 net/core/skbuff.c:176
 __alloc_skb+0xe9/0x5a0 net/core/skbuff.c:412
 __napi_alloc_skb+0x155/0x2d0 net/core/skbuff.c:568
 napi_alloc_skb include/linux/skbuff.h:2971 [inline]
 page_to_skb+0x27f/0xcc0 drivers/net/virtio_net.c:437
 receive_mergeable+0x310/0x3b10 drivers/net/virtio_net.c:1042
 receive_buf+0x158/0x1dc0 drivers/net/virtio_net.c:1152
 virtnet_receive drivers/net/virtio_net.c:1444 [inline]
 virtnet_poll+0x5ed/0x11c0 drivers/net/virtio_net.c:1553
 __napi_poll+0xbd/0x520 net/core/dev.c:7020
 napi_poll net/core/dev.c:7087 [inline]
 net_rx_action+0x61c/0xf30 net/core/dev.c:7174
 __do_softirq+0x392/0x7a3 kernel/softirq.c:558
 __irq_exit_rcu+0xec/0x170 kernel/softirq.c:636
page last free stack trace:
 reset_page_owner include/linux/page_owner.h:24 [inline]
 free_pages_prepare mm/page_alloc.c:1338 [inline]
 free_pcp_prepare+0xd1c/0xe00 mm/page_alloc.c:1389
 free_unref_page_prepare mm/page_alloc.c:3309 [inline]
 free_unref_page+0x7d/0x580 mm/page_alloc.c:3388
 skb_release_data+0x2b0/0x4f0 net/core/skbuff.c:672
 skb_release_all net/core/skbuff.c:742 [inline]
 __kfree_skb+0x56/0x1d0 net/core/skbuff.c:756
 sk_eat_skb include/net/sock.h:2652 [inline]
 tcp_recvmsg_locked+0x15b4/0x29b0 net/ipv4/tcp.c:2485
 tcp_recvmsg+0x266/0x810 net/ipv4/tcp.c:2531
 inet_recvmsg+0x156/0x270 net/ipv4/af_inet.c:850
 sock_recvmsg_nosec net/socket.c:944 [inline]
 sock_recvmsg net/socket.c:962 [inline]
 sock_read_iter+0x3a7/0x4d0 net/socket.c:1035
 call_read_iter include/linux/fs.h:2156 [inline]
 new_sync_read fs/read_write.c:400 [inline]
 vfs_read+0xaf9/0xe60 fs/read_write.c:481
 ksys_read+0x18f/0x2c0 fs/read_write.c:619
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x44/0xd0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x44/0xae

Memory state around the buggy address:
 ffff88807c7e2380: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb
 ffff88807c7e2400: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
>ffff88807c7e2480: fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc fc
                            ^
 ffff88807c7e2500: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
 ffff88807c7e2580: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc
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