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BUG: KASAN: slab-out-of-bounds in primary_event_id kernel/events/core.c:1316 [inline]
BUG: KASAN: slab-out-of-bounds in perf_output_read_group kernel/events/core.c:5895 [inline]
BUG: KASAN: slab-out-of-bounds in perf_output_read+0x1046/0x1090 kernel/events/core.c:5930
Read of size 8 at addr ffff88809d4bd260 by task syz-executor.5/18662

CPU: 0 PID: 18662 Comm: syz-executor.5 Not tainted 4.14.212-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
 __dump_stack lib/dump_stack.c:17 [inline]
 dump_stack+0x1b2/0x283 lib/dump_stack.c:58
 print_address_description.cold+0x54/0x1d3 mm/kasan/report.c:252
 kasan_report_error.cold+0x8a/0x194 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:1316 [inline]
 perf_output_read_group kernel/events/core.c:5895 [inline]
 perf_output_read+0x1046/0x1090 kernel/events/core.c:5930
 perf_output_sample+0xa28/0x16f0 kernel/events/core.c:5972
 __perf_event_output kernel/events/core.c:6285 [inline]
 perf_event_output_forward+0xf8/0x1f0 kernel/events/core.c:6298
 __perf_event_overflow+0x113/0x310 kernel/events/core.c:7547
 perf_swevent_overflow kernel/events/core.c:7623 [inline]
 perf_swevent_event+0x299/0x460 kernel/events/core.c:7651
 do_perf_sw_event kernel/events/core.c:7764 [inline]
 ___perf_sw_event+0x2a1/0x480 kernel/events/core.c:7795
 __perf_sw_event+0x4f/0x100 kernel/events/core.c:7807
 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:1123
RIP: 0010:copy_user_enhanced_fast_string+0xe/0x20 arch/x86/lib/copy_user_64.S:181
RSP: 0018:ffff888071237a78 EFLAGS: 00010202
RAX: ffffed100e2e1000 RBX: 0000000000003bb6 RCX: 0000000000001acb
RDX: 0000000000003bb6 RSI: 0000000020f64000 RDI: ffff888071706535
RBP: 0000000020f61f15 R08: 0000000000000001 R09: ffffed100e2e0fff
R10: ffff888071707fff R11: 0000000000000000 R12: ffff88807170444a
R13: 00007ffffffff000 R14: 0000000020f65acb R15: ffff88807170444a
 copy_user_generic arch/x86/include/asm/uaccess_64.h:37 [inline]
 raw_copy_from_user arch/x86/include/asm/uaccess_64.h:55 [inline]
 copyin+0x99/0xc0 lib/iov_iter.c:146
 _copy_from_iter_full+0x197/0x690 lib/iov_iter.c:608
 copy_from_iter_full include/linux/uio.h:126 [inline]
 skb_do_copy_data_nocache include/net/sock.h:1889 [inline]
 skb_copy_to_page_nocache include/net/sock.h:1915 [inline]
 tcp_sendmsg_locked+0x23fc/0x2ef0 net/ipv4/tcp.c:1360
 tcp_sendmsg+0x2b/0x40 net/ipv4/tcp.c:1457
 inet_sendmsg+0x11a/0x4e0 net/ipv4/af_inet.c:762
 sock_sendmsg_nosec net/socket.c:646 [inline]
 sock_sendmsg+0xb5/0x100 net/socket.c:656
 SYSC_sendto net/socket.c:1763 [inline]
 SyS_sendto+0x1c7/0x2c0 net/socket.c:1731
 do_syscall_64+0x1d5/0x640 arch/x86/entry/common.c:292
 entry_SYSCALL_64_after_hwframe+0x46/0xbb
RIP: 0033:0x45e299
RSP: 002b:00007f5b16fe5c68 EFLAGS: 00000246 ORIG_RAX: 000000000000002c
RAX: ffffffffffffffda RBX: 0000000000000006 RCX: 000000000045e299
RDX: ffffffffffffffef RSI: 0000000020d7cfcb RDI: 0000000000000006
RBP: 000000000119bfd8 R08: 0000000000000000 R09: 0000000000000053
R10: 0000000000000000 R11: 0000000000000246 R12: 000000000119bf8c
R13: 00007ffe8b217fef R14: 00007f5b16fe69c0 R15: 000000000119bf8c

Allocated by task 7991:
 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
 kmem_cache_alloc+0x124/0x3c0 mm/slab.c:3552
 kmem_cache_zalloc include/linux/slab.h:651 [inline]
 __kernfs_new_node+0x6f/0x470 fs/kernfs/dir.c:632
 kernfs_new_node+0x7b/0xe0 fs/kernfs/dir.c:677
 __kernfs_create_file+0x3d/0x320 fs/kernfs/file.c:989
 sysfs_add_file_mode_ns+0x1e1/0x450 fs/sysfs/file.c:307
 create_files fs/sysfs/group.c:64 [inline]
 internal_create_group+0x22b/0x710 fs/sysfs/group.c:134
 sysfs_create_group fs/sysfs/group.c:156 [inline]
 sysfs_create_groups fs/sysfs/group.c:183 [inline]
 sysfs_create_groups+0x92/0x127 fs/sysfs/group.c:173
 device_add_groups drivers/base/core.c:1049 [inline]
 device_add_attrs drivers/base/core.c:1197 [inline]
 device_add+0x7e5/0x15c0 drivers/base/core.c:1886
 netdev_register_kobject+0x181/0x410 net/core/net-sysfs.c:1608
 register_netdevice+0x955/0xe40 net/core/dev.c:7660
 macvlan_common_newlink+0xb5a/0x1480 drivers/net/macvlan.c:1436
 macvtap_newlink drivers/net/macvtap.c:108 [inline]
 macvtap_newlink+0x17b/0x230 drivers/net/macvtap.c:80
 rtnl_newlink+0xf88/0x1830 net/core/rtnetlink.c:2728
 rtnetlink_rcv_msg+0x3be/0xb10 net/core/rtnetlink.c:4316
 netlink_rcv_skb+0x125/0x390 net/netlink/af_netlink.c:2433
 netlink_unicast_kernel net/netlink/af_netlink.c:1287 [inline]
 netlink_unicast+0x437/0x610 net/netlink/af_netlink.c:1313
 netlink_sendmsg+0x62e/0xb80 net/netlink/af_netlink.c:1878
 sock_sendmsg_nosec net/socket.c:646 [inline]
 sock_sendmsg+0xb5/0x100 net/socket.c:656
 SYSC_sendto net/socket.c:1763 [inline]
 SyS_sendto+0x1c7/0x2c0 net/socket.c:1731
 do_syscall_64+0x1d5/0x640 arch/x86/entry/common.c:292
 entry_SYSCALL_64_after_hwframe+0x46/0xbb

Freed by task 0:
(stack is not available)

The buggy address belongs to the object at ffff88809d4bd1c0
 which belongs to the cache kernfs_node_cache of size 160
The buggy address is located 0 bytes to the right of
 160-byte region [ffff88809d4bd1c0, ffff88809d4bd260)
The buggy address belongs to the page:
page:ffffea0002752f40 count:1 mapcount:0 mapping:ffff88809d4bd000 index:0xffff88809d4bdfee
flags: 0xfff00000000100(slab)
raw: 00fff00000000100 ffff88809d4bd000 ffff88809d4bdfee 0000000100000012
raw: ffffea0002d5dc60 ffffea0002752fa0 ffff88823f8bb680 0000000000000000
page dumped because: kasan: bad access detected

Memory state around the buggy address:
 ffff88809d4bd100: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
 ffff88809d4bd180: fc fc fc fc fc fc fc fc 00 00 00 00 00 00 00 00
>ffff88809d4bd200: 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc
                                                       ^
 ffff88809d4bd280: fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00
 ffff88809d4bd300: 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc
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