IPv6: ADDRCONF(NETDEV_CHANGE): vlan2: link becomes ready device gtp9 left promiscuous mode device gtp3 entered promiscuous mode kasan: CONFIG_KASAN_INLINE enabled kasan: GPF could be caused by NULL-ptr deref or user memory access general protection fault: 0000 [#1] PREEMPT SMP KASAN Modules linked in: CPU: 0 PID: 9187 Comm: syz-executor.2 Not tainted 4.14.213-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 task: ffff8881ed6ec6c0 task.stack: ffff8881ddc80000 RIP: 0010:__read_once_size include/linux/compiler.h:183 [inline] RIP: 0010:compound_head include/linux/page-flags.h:147 [inline] RIP: 0010:put_page include/linux/mm.h:860 [inline] RIP: 0010:__skb_frag_unref include/linux/skbuff.h:2813 [inline] RIP: 0010:skb_release_data+0x1a1/0x820 net/core/skbuff.c:568 RSP: 0018:ffff8881f6607a70 EFLAGS: 00010202 RAX: 0000000000000004 RBX: 0000000000000000 RCX: 0000000000000000 RDX: 1ffff1103e534358 RSI: ffff8881f29a1ac0 RDI: 0000000000000020 RBP: ffff8881f6607ad0 R08: ffff8881f29a1af0 R09: 1ffff1103e534358 R10: 0000000000000078 R11: ffff8881ed6ec6c0 R12: ffff8881dacc18c0 R13: ffffed103e534358 R14: dffffc0000000000 R15: 0000000000000002 FS: 00007f41d3c60700(0000) GS:ffff8881f6600000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f814baf7db8 CR3: 00000001f3ec7004 CR4: 00000000001606f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: skb_release_all+0x3d/0x50 net/core/skbuff.c:631 __kfree_skb net/core/skbuff.c:645 [inline] kfree_skb+0x8a/0x2b0 net/core/skbuff.c:663 validate_xmit_skb+0x5ec/0x910 net/core/dev.c:3105 __dev_queue_xmit+0x578/0x25b0 net/core/dev.c:3513 dev_queue_xmit+0xb/0x10 net/core/dev.c:3554 mrp_queue_xmit net/802/mrp.c:354 [inline] mrp_join_timer+0x47/0x61 net/802/mrp.c:598 call_timer_fn+0x142/0x570 kernel/time/timer.c:1280 expire_timers+0x299/0x440 kernel/time/timer.c:1319 __run_timers kernel/time/timer.c:1637 [inline] run_timer_softirq+0x1cd/0x540 kernel/time/timer.c:1650 __do_softirq+0x246/0x9b5 kernel/softirq.c:288 do_softirq_own_stack+0x2a/0x40 arch/x86/entry/entry_64.S:1016 do_softirq+0xee/0x160 kernel/softirq.c:332 __local_bh_enable_ip+0x130/0x150 kernel/softirq.c:185 __raw_spin_unlock_bh include/linux/spinlock_api_smp.h:176 [inline] _raw_spin_unlock_bh+0x30/0x40 kernel/locking/spinlock.c:208 spin_unlock_bh include/linux/spinlock.h:362 [inline] mrp_request_join+0x381/0x4d0 net/802/mrp.c:539 vlan_mvrp_request_join+0x126/0x150 net/8021q/vlan_mvrp.c:43 vlan_dev_open+0x3e1/0x7e0 net/8021q/vlan_dev.c:296 __dev_open+0x178/0x290 net/core/dev.c:1367 __dev_change_flags+0x3d5/0x550 net/core/dev.c:6794 rtnl_configure_link+0x116/0x220 net/core/rtnetlink.c:2421 rtnl_newlink+0xc45/0x13a0 net/core/rtnetlink.c:2748 rtnetlink_rcv_msg+0x34c/0x9e0 net/core/rtnetlink.c:4316 netlink_rcv_skb+0x12f/0x3b0 net/netlink/af_netlink.c:2433 rtnetlink_rcv+0x10/0x20 net/core/rtnetlink.c:4328 netlink_unicast_kernel net/netlink/af_netlink.c:1287 [inline] netlink_unicast+0x40b/0x610 net/netlink/af_netlink.c:1313 netlink_sendmsg+0x657/0xc60 net/netlink/af_netlink.c:1878 sock_sendmsg_nosec net/socket.c:646 [inline] sock_sendmsg+0xac/0xf0 net/socket.c:656 ___sys_sendmsg+0x625/0x920 net/socket.c:2062 __sys_sendmsg+0xc1/0x140 net/socket.c:2096 SYSC_sendmsg net/socket.c:2107 [inline] SyS_sendmsg+0xd/0x20 net/socket.c:2103 do_syscall_64+0x1c7/0x5b0 arch/x86/entry/common.c:292 entry_SYSCALL_64_after_hwframe+0x46/0xbb RIP: 0033:0x45d5b9 RSP: 002b:00007f41d3c5fc78 EFLAGS: 00000246 ORIG_RAX: 000000000000002e RAX: ffffffffffffffda RBX: 000000000002ce80 RCX: 000000000045d5b9 RDX: 0000000000000000 RSI: 0000000020000280 RDI: 0000000000000005 RBP: 000000000118d020 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 000000000118cfec R13: 00007fffc05038ff R14: 00007f41d3c609c0 R15: 000000000118cfec Code: 89 c0 48 c1 e8 03 42 80 3c 30 00 0f 85 d6 04 00 00 48 63 c1 48 83 c0 03 48 c1 e0 04 48 8b 1c 06 48 8d 7b 20 48 89 f8 48 c1 e8 03 <42> 80 3c 30 00 0f 85 d4 04 00 00 48 8b 43 20 48 8d 78 ff a8 01 RIP: __read_once_size include/linux/compiler.h:183 [inline] RSP: ffff8881f6607a70 RIP: compound_head include/linux/page-flags.h:147 [inline] RSP: ffff8881f6607a70 RIP: put_page include/linux/mm.h:860 [inline] RSP: ffff8881f6607a70 RIP: __skb_frag_unref include/linux/skbuff.h:2813 [inline] RSP: ffff8881f6607a70 RIP: skb_release_data+0x1a1/0x820 net/core/skbuff.c:568 RSP: ffff8881f6607a70 ---[ end trace 49fb39e9850dc870 ]---