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BUG: KASAN: use-after-free in primary_event_id kernel/events/core.c:1318 [inline]
BUG: KASAN: use-after-free in perf_output_read_group kernel/events/core.c:5897 [inline]
BUG: KASAN: use-after-free in perf_output_read+0x1032/0x1090 kernel/events/core.c:5932
Read of size 8 at addr ffff8880a90213c8 by task syz-executor.0/11215

CPU: 0 PID: 11215 Comm: syz-executor.0 Not tainted 4.14.300-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/26/2022
Call Trace:
 __dump_stack lib/dump_stack.c:17 [inline]
 dump_stack+0x1b2/0x281 lib/dump_stack.c:58
 print_address_description.cold+0x54/0x1d3 mm/kasan/report.c:252
 kasan_report_error.cold+0x8a/0x191 mm/kasan/report.c:351
 kasan_report mm/kasan/report.c:409 [inline]
 __asan_report_load8_noabort+0x68/0x70 mm/kasan/report.c:430
 primary_event_id kernel/events/core.c:1318 [inline]
 perf_output_read_group kernel/events/core.c:5897 [inline]
 perf_output_read+0x1032/0x1090 kernel/events/core.c:5932
 perf_output_sample+0xa28/0x16f0 kernel/events/core.c:5974
 __perf_event_output kernel/events/core.c:6287 [inline]
 perf_event_output_forward+0xf8/0x1f0 kernel/events/core.c:6300
 __perf_event_overflow+0x113/0x310 kernel/events/core.c:7549
 perf_swevent_overflow kernel/events/core.c:7625 [inline]
 perf_swevent_event+0x299/0x460 kernel/events/core.c:7653
 do_perf_sw_event kernel/events/core.c:7766 [inline]
 ___perf_sw_event+0x2a1/0x480 kernel/events/core.c:7797
 __perf_sw_event+0x4f/0x100 kernel/events/core.c:7809
 perf_sw_event include/linux/perf_event.h:1046 [inline]
 __do_page_fault+0x692/0xad0 arch/x86/mm/fault.c:1483
 page_fault+0x25/0x50 arch/x86/entry/entry_64.S:1126

Allocated by task 0:
 save_stack mm/kasan/kasan.c:447 [inline]
 set_track mm/kasan/kasan.c:459 [inline]
 kasan_kmalloc+0xeb/0x160 mm/kasan/kasan.c:551
 __do_kmalloc_node mm/slab.c:3682 [inline]
 __kmalloc_node_track_caller+0x4c/0x70 mm/slab.c:3696
 __kmalloc_reserve net/core/skbuff.c:137 [inline]
 __alloc_skb+0x96/0x510 net/core/skbuff.c:205
 __napi_alloc_skb+0x57/0x2d0 net/core/skbuff.c:478
 napi_alloc_skb include/linux/skbuff.h:2721 [inline]
 page_to_skb+0x7b/0x820 drivers/net/virtio_net.c:323
 receive_mergeable drivers/net/virtio_net.c:723 [inline]
 receive_buf+0x1f71/0x4d70 drivers/net/virtio_net.c:828
 virtnet_receive drivers/net/virtio_net.c:1102 [inline]
 virtnet_poll+0x4b7/0x960 drivers/net/virtio_net.c:1193
 napi_poll net/core/dev.c:5604 [inline]
 net_rx_action+0x466/0xfd0 net/core/dev.c:5670
 __do_softirq+0x24d/0x9ff kernel/softirq.c:288

Freed by task 7974:
 save_stack mm/kasan/kasan.c:447 [inline]
 set_track mm/kasan/kasan.c:459 [inline]
 kasan_slab_free+0xc3/0x1a0 mm/kasan/kasan.c:524
 __cache_free mm/slab.c:3496 [inline]
 kfree+0xc9/0x250 mm/slab.c:3815
 skb_free_head net/core/skbuff.c:563 [inline]
 skb_release_data+0x5f6/0x820 net/core/skbuff.c:583
 skb_release_all net/core/skbuff.c:640 [inline]
 __kfree_skb net/core/skbuff.c:654 [inline]
 kfree_skb_partial+0x75/0x90 net/core/skbuff.c:4832
 tcp_rcv_established+0x1650/0x1a50 net/ipv4/tcp_input.c:5576
 tcp_v4_do_rcv+0x675/0x800 net/ipv4/tcp_ipv4.c:1490
 sk_backlog_rcv include/net/sock.h:923 [inline]
 __release_sock+0x12a/0x350 net/core/sock.c:2284
 release_sock+0x54/0x1b0 net/core/sock.c:2822
 tcp_recvmsg+0x66d/0x1d50 net/ipv4/tcp.c:2015
 inet_recvmsg+0xef/0x4d0 net/ipv4/af_inet.c:793
 sock_recvmsg_nosec net/socket.c:819 [inline]
 sock_recvmsg net/socket.c:826 [inline]
 sock_recvmsg net/socket.c:822 [inline]
 sock_read_iter+0x2be/0x3f0 net/socket.c:903
 call_read_iter include/linux/fs.h:1774 [inline]
 new_sync_read fs/read_write.c:401 [inline]
 __vfs_read+0x449/0x620 fs/read_write.c:413
 vfs_read+0x139/0x340 fs/read_write.c:447
 SYSC_read fs/read_write.c:574 [inline]
 SyS_read+0xf2/0x210 fs/read_write.c:567
 do_syscall_64+0x1d5/0x640 arch/x86/entry/common.c:292
 entry_SYSCALL_64_after_hwframe+0x5e/0xd3

The buggy address belongs to the object at ffff8880a90212c0
 which belongs to the cache kmalloc-512 of size 512
The buggy address is located 264 bytes inside of
 512-byte region [ffff8880a90212c0, ffff8880a90214c0)
The buggy address belongs to the page:
page:ffffea0002a40840 count:1 mapcount:0 mapping:ffff8880a9021040 index:0x0
flags: 0xfff00000000100(slab)
raw: 00fff00000000100 ffff8880a9021040 0000000000000000 0000000100000006
raw: ffffea0002aaaba0 ffffea00026f2460 ffff88813fe74940 0000000000000000
page dumped because: kasan: bad access detected

Memory state around the buggy address:
 ffff8880a9021280: fc fc fc fc fc fc fc fc fb fb fb fb fb fb fb fb
 ffff8880a9021300: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
>ffff8880a9021380: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
                                              ^
 ffff8880a9021400: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
 ffff8880a9021480: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc
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