device gtp2 entered promiscuous mode device vlan2 entered promiscuous mode IPv6: ADDRCONF(NETDEV_CHANGE): vlan2: link becomes ready 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: 1 PID: 8812 Comm: syz-executor.2 Not tainted 4.14.221-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 task: ffff8881d7f0c380 task.stack: ffff8881d0ba8000 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:2829 [inline] RIP: 0010:skb_release_data+0x1a1/0x820 net/core/skbuff.c:577 RSP: 0018:ffff8881f6707a30 EFLAGS: 00010202 RAX: 0000000000000004 RBX: 0000000000000000 RCX: 0000000000000000 RDX: 1ffff1103ac96a20 RSI: ffff8881d64b5100 RDI: 0000000000000020 RBP: ffff8881f6707a90 R08: ffff8881d64b5130 R09: 1ffff1103ac96a20 R10: 00000000000000a0 R11: ffff8881d7f0c380 R12: ffff8881d6f9a340 R13: ffffed103ac96a20 R14: dffffc0000000000 R15: 0000000000000002 FS: 00007f5457fce700(0000) GS:ffff8881f6700000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f1a62447000 CR3: 00000001d73ab003 CR4: 00000000001606e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: skb_release_all+0x3d/0x50 net/core/skbuff.c:640 __kfree_skb net/core/skbuff.c:654 [inline] kfree_skb+0x8a/0x2b0 net/core/skbuff.c:672 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+0x47/0x70 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+0x247/0x9a2 kernel/softirq.c:288 invoke_softirq kernel/softirq.c:368 [inline] irq_exit+0x15f/0x1a0 kernel/softirq.c:409 exiting_irq arch/x86/include/asm/apic.h:638 [inline] smp_apic_timer_interrupt+0x149/0x5d0 arch/x86/kernel/apic/apic.c:1106 apic_timer_interrupt+0x9a/0xa0 arch/x86/entry/entry_64.S:793 RIP: 0010:arch_local_irq_restore arch/x86/include/asm/paravirt.h:779 [inline] RIP: 0010:console_unlock+0xabf/0xe50 kernel/printk/printk.c:2408 RSP: 0018:ffff8881d0baeed0 EFLAGS: 00000286 ORIG_RAX: ffffffffffffff10 RAX: 1ffffffff0fe2bc1 RBX: 0000000000000200 RCX: 1ffff1103afe198a RDX: 0000000000000000 RSI: ffff8881d7f0cc30 RDI: 0000000000000286 RBP: ffff8881d0baef48 R08: ffff8881d7f0cc50 R09: 0000000000000000 R10: 0000000000000000 R11: dffffc0000000000 R12: 0000000000000000 R13: 0000000000000000 R14: ffffffff885a0200 R15: ffffffff885a01d0 vprintk_emit+0x32f/0x4e0 kernel/printk/printk.c:1923 vprintk_default+0x1a/0x20 kernel/printk/printk.c:1963 vprintk_func+0x49/0x130 kernel/printk/printk_safe.c:401 printk+0x91/0xab kernel/printk/printk.c:1996 addrconf_notify.cold.49+0x126/0x138 net/ipv6/addrconf.c:3451 notifier_call_chain+0xd6/0x150 kernel/notifier.c:93 __raw_notifier_call_chain kernel/notifier.c:394 [inline] raw_notifier_call_chain+0x11/0x20 kernel/notifier.c:401 call_netdevice_notifiers_info+0x4b/0x60 net/core/dev.c:1667 __dev_notify_flags+0x1c1/0x210 net/core/dev.c:6842 rtnl_configure_link+0x1b4/0x220 net/core/rtnetlink.c:2430 rtnl_newlink+0xcce/0x1610 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+0x639/0xbe0 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: 0033:0x465109 RSP: 002b:00007f5457fce188 EFLAGS: 00000246 ORIG_RAX: 000000000000002e RAX: ffffffffffffffda RBX: 000000000055cfa0 RCX: 0000000000465109 RDX: 0000000000000000 RSI: 0000000020000280 RDI: 0000000000000005 RBP: 00000000004af711 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 000000000055cfa0 R13: 00007fffd5d1ca6f R14: 00007f5457fce300 R15: 0000000000022000 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: ffff8881f6707a30 RIP: compound_head include/linux/page-flags.h:147 [inline] RSP: ffff8881f6707a30 RIP: put_page include/linux/mm.h:860 [inline] RSP: ffff8881f6707a30 RIP: __skb_frag_unref include/linux/skbuff.h:2829 [inline] RSP: ffff8881f6707a30 RIP: skb_release_data+0x1a1/0x820 net/core/skbuff.c:577 RSP: ffff8881f6707a30 ---[ end trace 62e3b9cb3bd8125e ]---