general protection fault, probably for non-canonical address 0xdffffc0000000000: 0000 [#1] PREEMPT SMP KASAN KASAN: null-ptr-deref in range [0x0000000000000000-0x0000000000000007] CPU: 0 PID: 32304 Comm: syz-executor.0 Not tainted 5.9.0-rc4-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:__list_del_entry_valid+0x67/0x100 lib/list_debug.c:51 Code: 4c 89 f7 e8 db 26 10 fe 48 ba 00 01 00 00 00 00 ad de 49 8b 1e 48 39 d3 74 53 48 83 c2 22 49 39 d7 74 5d 4c 89 f8 48 c1 e8 03 <42> 80 3c 20 00 74 08 4c 89 ff e8 aa 26 10 fe 49 8b 17 4c 39 f2 75 RSP: 0018:ffffc9000add6e78 EFLAGS: 00010046 RAX: 0000000000000000 RBX: ffff8880a4a0c2e8 RCX: dffffc0000000000 RDX: dead000000000122 RSI: ffff8880ae8358d8 RDI: ffff8880001e2570 RBP: dffffc0000000000 R08: dffffc0000000000 R09: fffffbfff131e2e6 R10: fffffbfff131e2e6 R11: 0000000000000000 R12: dffffc0000000000 R13: ffff8880001e2568 R14: ffff8880001e2568 R15: 0000000000000000 FS: 00007fa66bfb8700(0000) GS:ffff8880ae800000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000001b2d321000 CR3: 0000000214acc000 CR4: 00000000001526f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: __list_del_entry include/linux/list.h:132 [inline] list_move include/linux/list.h:215 [inline] pick_next_task_fair+0x553/0x970 kernel/sched/fair.c:7081 pick_next_task kernel/sched/core.c:4344 [inline] __schedule+0x422/0xd20 kernel/sched/core.c:4495 preempt_schedule_common kernel/sched/core.c:4683 [inline] preempt_schedule+0xc8/0x110 kernel/sched/core.c:4708 preempt_schedule_thunk+0x16/0x18 arch/x86/entry/thunk_64.S:40 __local_bh_enable_ip+0x165/0x1c0 kernel/softirq.c:202 spin_unlock_bh include/linux/spinlock.h:399 [inline] __fib6_clean_all+0x551/0x730 net/ipv6/ip6_fib.c:2248 rt_genid_bump_ipv6 include/net/net_namespace.h:458 [inline] add_addr+0x1e6/0x4a0 net/ipv6/addrconf.c:3078 sit_add_v4_addrs net/ipv6/addrconf.c:3132 [inline] addrconf_sit_config net/ipv6/addrconf.c:3383 [inline] addrconf_notify+0x216f/0x3a60 net/ipv6/addrconf.c:3576 notifier_call_chain kernel/notifier.c:83 [inline] __raw_notifier_call_chain kernel/notifier.c:361 [inline] raw_notifier_call_chain+0xe7/0x170 kernel/notifier.c:368 __dev_notify_flags+0x253/0x4d0 net/core/dev.c:2033 rtnl_configure_link+0x21f/0x340 net/core/rtnetlink.c:3130 __rtnl_newlink net/core/rtnetlink.c:3460 [inline] rtnl_newlink+0x15a7/0x1c10 net/core/rtnetlink.c:3500 rtnetlink_rcv_msg+0x889/0xd40 net/core/rtnetlink.c:5563 netlink_rcv_skb+0x190/0x3a0 net/netlink/af_netlink.c:2470 netlink_unicast_kernel net/netlink/af_netlink.c:1304 [inline] netlink_unicast+0x786/0x940 net/netlink/af_netlink.c:1330 netlink_sendmsg+0xa57/0xd70 net/netlink/af_netlink.c:1919 sock_sendmsg_nosec net/socket.c:651 [inline] sock_sendmsg net/socket.c:671 [inline] ____sys_sendmsg+0x519/0x800 net/socket.c:2353 ___sys_sendmsg net/socket.c:2407 [inline] __sys_sendmsg+0x2b1/0x360 net/socket.c:2440 do_syscall_64+0x31/0x70 arch/x86/entry/common.c:46 entry_SYSCALL_64_after_hwframe+0x44/0xa9 RIP: 0033:0x45d5b9 Code: 5d 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 2b b4 fb ff c3 66 2e 0f 1f 84 00 00 00 00 RSP: 002b:00007fa66bfb7c78 EFLAGS: 00000246 ORIG_RAX: 000000000000002e RAX: ffffffffffffffda RBX: 000000000002cf00 RCX: 000000000045d5b9 RDX: 0000000000000000 RSI: 0000000020000040 RDI: 0000000000000008 RBP: 000000000118cf80 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 000000000118cf4c R13: 00007ffee0be82bf R14: 00007fa66bfb89c0 R15: 000000000118cf4c Modules linked in: ---[ end trace 92002e359211cd70 ]--- RIP: 0010:__list_del_entry_valid+0x67/0x100 lib/list_debug.c:51 Code: 4c 89 f7 e8 db 26 10 fe 48 ba 00 01 00 00 00 00 ad de 49 8b 1e 48 39 d3 74 53 48 83 c2 22 49 39 d7 74 5d 4c 89 f8 48 c1 e8 03 <42> 80 3c 20 00 74 08 4c 89 ff e8 aa 26 10 fe 49 8b 17 4c 39 f2 75 RSP: 0018:ffffc9000add6e78 EFLAGS: 00010046 RAX: 0000000000000000 RBX: ffff8880a4a0c2e8 RCX: dffffc0000000000 RDX: dead000000000122 RSI: ffff8880ae8358d8 RDI: ffff8880001e2570 RBP: dffffc0000000000 R08: dffffc0000000000 R09: fffffbfff131e2e6 R10: fffffbfff131e2e6 R11: 0000000000000000 R12: dffffc0000000000 R13: ffff8880001e2568 R14: ffff8880001e2568 R15: 0000000000000000 FS: 00007fa66bfb8700(0000) GS:ffff8880ae800000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000001b2d321000 CR3: 0000000214acc000 CR4: 00000000001526f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400