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BUG: KASAN: use-after-free in __read_once_size include/linux/compiler.h:185 [inline]
BUG: KASAN: use-after-free in radix_tree_load_root lib/radix-tree.c:602 [inline]
BUG: KASAN: use-after-free in radix_tree_next_chunk+0x89f/0x8c0 lib/radix-tree.c:1736
Read of size 8 at addr ffff888043e9eec8 by task syz-executor.0/11233

CPU: 1 PID: 11233 Comm: syz-executor.0 Not tainted 4.14.257-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+0x1b2/0x281 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
netlink: 20 bytes leftover after parsing attributes in process `syz-executor.4'.
 kasan_report mm/kasan/report.c:409 [inline]
 __asan_report_load8_noabort+0x68/0x70 mm/kasan/report.c:430
 __read_once_size include/linux/compiler.h:185 [inline]
 radix_tree_load_root lib/radix-tree.c:602 [inline]
 radix_tree_next_chunk+0x89f/0x8c0 lib/radix-tree.c:1736
 radix_tree_iter_lookup include/linux/radix-tree.h:440 [inline]
 ida_remove+0x9b/0x210 lib/idr.c:377
netlink: 20 bytes leftover after parsing attributes in process `syz-executor.4'.
 ida_simple_remove+0x31/0x50 lib/idr.c:503
 ipvlan_link_new+0x50c/0xfa0 drivers/net/ipvlan/ipvlan_main.c:648
 rtnl_newlink+0xfab/0x1860 net/core/rtnetlink.c:2728
 rtnetlink_rcv_msg+0x3be/0xb10 net/core/rtnetlink.c:4320
 netlink_rcv_skb+0x125/0x390 net/netlink/af_netlink.c:2441
 netlink_unicast_kernel net/netlink/af_netlink.c:1294 [inline]
 netlink_unicast+0x437/0x610 net/netlink/af_netlink.c:1320
 netlink_sendmsg+0x638/0xb90 net/netlink/af_netlink.c:1886
 sock_sendmsg_nosec net/socket.c:646 [inline]
 sock_sendmsg+0xb5/0x100 net/socket.c:656
 ___sys_sendmsg+0x6c8/0x800 net/socket.c:2062
 __sys_sendmsg+0xa3/0x120 net/socket.c:2096
 SYSC_sendmsg net/socket.c:2107 [inline]
 SyS_sendmsg+0x27/0x40 net/socket.c:2103
 do_syscall_64+0x1d5/0x640 arch/x86/entry/common.c:292
 entry_SYSCALL_64_after_hwframe+0x46/0xbb
RIP: 0033:0x7fddc5292af9
RSP: 002b:00007fddc4208188 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
RAX: ffffffffffffffda RBX: 00007fddc53a5f60 RCX: 00007fddc5292af9
RDX: 0000000000000000 RSI: 00000000200000c0 RDI: 0000000000000003
RBP: 00007fddc52ecff7 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007fffc356c69f R14: 00007fddc4208300 R15: 0000000000022000

Allocated by task 11233:
 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_trace+0x131/0x3d0 mm/slab.c:3618
 kmalloc include/linux/slab.h:488 [inline]
 kzalloc include/linux/slab.h:661 [inline]
 ipvlan_port_create drivers/net/ipvlan/ipvlan_main.c:140 [inline]
 ipvlan_link_new+0x64f/0xfa0 drivers/net/ipvlan/ipvlan_main.c:577
 rtnl_newlink+0xfab/0x1860 net/core/rtnetlink.c:2728
 rtnetlink_rcv_msg+0x3be/0xb10 net/core/rtnetlink.c:4320
 netlink_rcv_skb+0x125/0x390 net/netlink/af_netlink.c:2441
 netlink_unicast_kernel net/netlink/af_netlink.c:1294 [inline]
 netlink_unicast+0x437/0x610 net/netlink/af_netlink.c:1320
 netlink_sendmsg+0x638/0xb90 net/netlink/af_netlink.c:1886
 sock_sendmsg_nosec net/socket.c:646 [inline]
 sock_sendmsg+0xb5/0x100 net/socket.c:656
 ___sys_sendmsg+0x6c8/0x800 net/socket.c:2062
 __sys_sendmsg+0xa3/0x120 net/socket.c:2096
 SYSC_sendmsg net/socket.c:2107 [inline]
 SyS_sendmsg+0x27/0x40 net/socket.c:2103
 do_syscall_64+0x1d5/0x640 arch/x86/entry/common.c:292
 entry_SYSCALL_64_after_hwframe+0x46/0xbb

Freed by task 11233:
 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
 ipvlan_uninit+0xb6/0xe0 drivers/net/ipvlan/ipvlan_main.c:244
 register_netdevice+0x7fd/0xe40 net/core/dev.c:7727
 ipvlan_link_new+0x499/0xfa0 drivers/net/ipvlan/ipvlan_main.c:626
 rtnl_newlink+0xfab/0x1860 net/core/rtnetlink.c:2728
 rtnetlink_rcv_msg+0x3be/0xb10 net/core/rtnetlink.c:4320
 netlink_rcv_skb+0x125/0x390 net/netlink/af_netlink.c:2441
 netlink_unicast_kernel net/netlink/af_netlink.c:1294 [inline]
 netlink_unicast+0x437/0x610 net/netlink/af_netlink.c:1320
 netlink_sendmsg+0x638/0xb90 net/netlink/af_netlink.c:1886
 sock_sendmsg_nosec net/socket.c:646 [inline]
 sock_sendmsg+0xb5/0x100 net/socket.c:656
 ___sys_sendmsg+0x6c8/0x800 net/socket.c:2062
 __sys_sendmsg+0xa3/0x120 net/socket.c:2096
 SYSC_sendmsg net/socket.c:2107 [inline]
 SyS_sendmsg+0x27/0x40 net/socket.c:2103
 do_syscall_64+0x1d5/0x640 arch/x86/entry/common.c:292
 entry_SYSCALL_64_after_hwframe+0x46/0xbb

The buggy address belongs to the object at ffff888043e9e600
 which belongs to the cache kmalloc-4096 of size 4096
The buggy address is located 2248 bytes inside of
 4096-byte region [ffff888043e9e600, ffff888043e9f600)
The buggy address belongs to the page:
page:ffffea00010fa780 count:1 mapcount:0 mapping:ffff888043e9e600 index:0x0 compound_mapcount: 0
flags: 0xfff00000008100(slab|head)
raw: 00fff00000008100 ffff888043e9e600 0000000000000000 0000000100000001
raw: ffffea00010fa720 ffffea000110b0a0 ffff88813fe74dc0 0000000000000000
page dumped because: kasan: bad access detected

Memory state around the buggy address:
 ffff888043e9ed80: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
 ffff888043e9ee00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
>ffff888043e9ee80: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
                                              ^
 ffff888043e9ef00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
 ffff888043e9ef80: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
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