netlink: 24 bytes leftover after parsing attributes in process `syz-executor.0'. netlink: 24 bytes leftover after parsing attributes in process `syz-executor.4'. netlink: 24 bytes leftover after parsing attributes in process `syz-executor.5'. macvtap0: Device is already in use. ================================================================== BUG: KASAN: use-after-free in __read_once_size include/linux/compiler.h:183 [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+0x8f8/0x950 lib/radix-tree.c:1736 Read of size 8 at addr ffff888089d2ac88 by task syz-executor.4/8787 CPU: 0 PID: 8787 Comm: syz-executor.4 Not tainted 4.14.184-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+0x54/0x1dc mm/kasan/report.c:252 kasan_report_error mm/kasan/report.c:351 [inline] kasan_report mm/kasan/report.c:409 [inline] kasan_report.cold+0xa9/0x2b9 mm/kasan/report.c:393 __read_once_size include/linux/compiler.h:183 [inline] radix_tree_load_root lib/radix-tree.c:602 [inline] radix_tree_next_chunk+0x8f8/0x950 lib/radix-tree.c:1736 radix_tree_iter_lookup include/linux/radix-tree.h:440 [inline] ida_remove+0x9b/0x210 lib/idr.c:377 ida_simple_remove+0x31/0x4c lib/idr.c:503 ipvlan_link_new+0x4f9/0xfc0 drivers/net/ipvlan/ipvlan_main.c:630 rtnl_newlink+0xecb/0x1720 net/core/rtnetlink.c:2728 rtnetlink_rcv_msg+0x3be/0xb10 net/core/rtnetlink.c:4315 netlink_rcv_skb+0x127/0x370 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+0x64a/0xbb0 net/netlink/af_netlink.c:1878 sock_sendmsg_nosec net/socket.c:646 [inline] sock_sendmsg+0xb5/0x100 net/socket.c:656 ___sys_sendmsg+0x70a/0x840 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: 0033:0x45ca69 RSP: 002b:00007f629c6a6c78 EFLAGS: 00000246 ORIG_RAX: 000000000000002e RAX: ffffffffffffffda RBX: 0000000000501a40 RCX: 000000000045ca69 RDX: 0000000000000000 RSI: 0000000020000040 RDI: 0000000000000006 RBP: 000000000078bfa0 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00000000ffffffff R13: 0000000000000a21 R14: 00000000004cd05a R15: 00007f629c6a76d4 Allocated by task 8787: save_stack mm/kasan/kasan.c:447 [inline] set_track mm/kasan/kasan.c:459 [inline] kasan_kmalloc.part.0+0x4f/0xd0 mm/kasan/kasan.c:551 kmem_cache_alloc_trace+0x14d/0x3f0 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+0x640/0xfc0 drivers/net/ipvlan/ipvlan_main.c:559 rtnl_newlink+0xecb/0x1720 net/core/rtnetlink.c:2728 rtnetlink_rcv_msg+0x3be/0xb10 net/core/rtnetlink.c:4315 netlink_rcv_skb+0x127/0x370 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+0x64a/0xbb0 net/netlink/af_netlink.c:1878 sock_sendmsg_nosec net/socket.c:646 [inline] sock_sendmsg+0xb5/0x100 net/socket.c:656 ___sys_sendmsg+0x70a/0x840 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 8787: save_stack mm/kasan/kasan.c:447 [inline] set_track mm/kasan/kasan.c:459 [inline] kasan_slab_free+0xaf/0x190 mm/kasan/kasan.c:524 __cache_free mm/slab.c:3496 [inline] kfree+0xcb/0x260 mm/slab.c:3815 ipvlan_uninit+0xb6/0xe0 drivers/net/ipvlan/ipvlan_main.c:233 register_netdevice+0x797/0xca0 net/core/dev.c:7715 ipvlan_link_new+0x485/0xfc0 drivers/net/ipvlan/ipvlan_main.c:608 rtnl_newlink+0xecb/0x1720 net/core/rtnetlink.c:2728 rtnetlink_rcv_msg+0x3be/0xb10 net/core/rtnetlink.c:4315 netlink_rcv_skb+0x127/0x370 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+0x64a/0xbb0 net/netlink/af_netlink.c:1878 sock_sendmsg_nosec net/socket.c:646 [inline] sock_sendmsg+0xb5/0x100 net/socket.c:656 ___sys_sendmsg+0x70a/0x840 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 ffff888089d2a3c0 which belongs to the cache kmalloc-4096 of size 4096 The buggy address is located 2248 bytes inside of 4096-byte region [ffff888089d2a3c0, ffff888089d2b3c0) The buggy address belongs to the page: page:ffffea0002274a80 count:1 mapcount:0 mapping:ffff888089d2a3c0 index:0x0 compound_mapcount: 0 flags: 0xfffe0000008100(slab|head) raw: 00fffe0000008100 ffff888089d2a3c0 0000000000000000 0000000100000001 raw: ffffea0002917820 ffffea0002418a20 ffff8880aa800dc0 0000000000000000 page dumped because: kasan: bad access detected Memory state around the buggy address: ffff888089d2ab80: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff888089d2ac00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb >ffff888089d2ac80: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ^ ffff888089d2ad00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff888089d2ad80: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ==================================================================