IPv6: ADDRCONF(NETDEV_CHANGE): vcan0: link becomes ready IPv6: ADDRCONF(NETDEV_CHANGE): vcan0: link becomes ready ------------[ cut here ]------------ kernel BUG at mm/slub.c:3934! invalid opcode: 0000 [#1] SMP PTI CPU: 0 PID: 1070 Comm: syz-executor5 Not tainted 4.18.0-rc8+ #32 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:spin_unlock_irqrestore include/linux/spinlock.h:365 [inline] RIP: 0010:__slab_free mm/slub.c:2893 [inline] RIP: 0010:do_slab_free mm/slub.c:2964 [inline] RIP: 0010:slab_free mm/slub.c:2977 [inline] RIP: 0010:kfree+0x410/0x5e0 mm/slub.c:3939 Code: 10 0f 83 83 00 00 00 4d 85 d2 75 0e 41 8b 47 08 89 c1 81 e1 00 0d 21 00 75 43 4c 89 e7 48 89 de e8 95 60 74 01 e9 14 fd ff ff <0f> 0b eb fe 48 c7 45 d0 00 00 00 00 9c 8f 45 d0 48 8b 5d d0 fa 49 RSP: 0018:ffff8801c8643078 EFLAGS: 00010246 RAX: dead000000000100 RBX: ffff8801e6a7eb80 RCX: ffffea00079a9f80 RDX: 0000000000000400 RSI: 0000000000000000 RDI: ffff8801e6a7eb5e RBP: ffff8801c86430e8 R08: ffffea00079a9f88 R09: ffffffff00000000 R10: ffff880217802f00 R11: ffffffff82336cd0 R12: ffff8801e6a7eb5e R13: ffffffff82337592 R14: ffffea00079a9f80 R15: ffff8801cb96fa00 FS: 00007ff4c0ec2700(0000) GS:ffff88021fc00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007ff4c0ec1db8 CR3: 00000001dcbac000 CR4: 00000000001406f0 DR0: 0000000020000000 DR1: 0000000020000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000600 Call Trace: qdisc_alloc+0x62/0x260 net/sched/sch_generic.c:828 qdisc_create_dflt+0x3a/0xc0 net/sched/sch_generic.c:894 mq_init+0xe3/0x1c0 net/sched/sch_mq.c:95 qdisc_create_dflt net/sched/sch_generic.c:901 [inline] attach_default_qdiscs net/sched/sch_generic.c:1036 [inline] dev_activate+0x25e/0x480 net/sched/sch_generic.c:1075 __dev_open+0x14a/0x1d0 net/core/dev.c:1402 __dev_change_flags+0xc7/0x250 net/core/dev.c:6991 dev_change_flags+0x30/0x80 net/core/dev.c:7060 do_setlink+0x467/0x1410 net/core/rtnetlink.c:2376 rtnl_group_changelink net/core/rtnetlink.c:2837 [inline] rtnl_newlink+0x7cc/0xed0 net/core/rtnetlink.c:2995 rtnetlink_rcv_msg+0x4bc/0x550 net/core/rtnetlink.c:4665 netlink_rcv_skb+0xe3/0x180 net/netlink/af_netlink.c:2455 rtnetlink_rcv+0x1c/0x20 net/core/rtnetlink.c:4683 netlink_unicast_kernel net/netlink/af_netlink.c:1317 [inline] netlink_unicast+0x45d/0x4b0 net/netlink/af_netlink.c:1343 netlink_sendmsg+0x426/0x470 net/netlink/af_netlink.c:1908 sock_sendmsg_nosec net/socket.c:642 [inline] sock_sendmsg net/socket.c:652 [inline] ___sys_sendmsg+0x240/0x330 net/socket.c:2126 __sys_sendmsg net/socket.c:2164 [inline] __do_sys_sendmsg net/socket.c:2173 [inline] __se_sys_sendmsg net/socket.c:2171 [inline] __x64_sys_sendmsg+0x9f/0xf0 net/socket.c:2171 do_syscall_64+0x61/0x90 arch/x86/entry/common.c:290 entry_SYSCALL_64_after_hwframe+0x44/0xa9 RIP: 0033:0x457089 Code: fd b4 fb ff c3 66 2e 0f 1f 84 00 00 00 00 00 66 90 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 0f 83 cb b4 fb ff c3 66 2e 0f 1f 84 00 00 00 00 RSP: 002b:00007ff4c0ec1c78 EFLAGS: 00000246 ORIG_RAX: 000000000000002e RAX: ffffffffffffffda RBX: 00007ff4c0ec26d4 RCX: 0000000000457089 RDX: 00000000000400c4 RSI: 0000000020000300 RDI: 0000000000000004 RBP: 0000000000930140 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00000000ffffffff R13: 00000000004d3c48 R14: 00000000004c891d R15: 0000000000000001 Modules linked in: Dumping ftrace buffer: (ftrace buffer empty) ---[ end trace e2118463fc4b871c ]--- RIP: 0010:spin_unlock_irqrestore include/linux/spinlock.h:365 [inline] RIP: 0010:__slab_free mm/slub.c:2893 [inline] RIP: 0010:do_slab_free mm/slub.c:2964 [inline] RIP: 0010:slab_free mm/slub.c:2977 [inline] RIP: 0010:kfree+0x410/0x5e0 mm/slub.c:3939 Code: 10 0f 83 83 00 00 00 4d 85 d2 75 0e 41 8b 47 08 89 c1 81 e1 00 0d 21 00 75 43 4c 89 e7 48 89 de e8 95 60 74 01 e9 14 fd ff ff <0f> 0b eb fe 48 c7 45 d0 00 00 00 00 9c 8f 45 d0 48 8b 5d d0 fa 49 RSP: 0018:ffff8801c8643078 EFLAGS: 00010246 RAX: dead000000000100 RBX: ffff8801e6a7eb80 RCX: ffffea00079a9f80 RDX: 0000000000000400 RSI: 0000000000000000 RDI: ffff8801e6a7eb5e RBP: ffff8801c86430e8 R08: ffffea00079a9f88 R09: ffffffff00000000 R10: ffff880217802f00 R11: ffffffff82336cd0 R12: ffff8801e6a7eb5e R13: ffffffff82337592 R14: ffffea00079a9f80 R15: ffff8801cb96fa00 FS: 00007ff4c0ec2700(0000) GS:ffff88021fc00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007ff4c0ec1db8 CR3: 00000001dcbac000 CR4: 00000000001406f0 DR0: 0000000020000000 DR1: 0000000020000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000600