BUG: unable to handle page fault for address: ffffed101ad1ea00 #PF: supervisor read access in kernel mode #PF: error_code(0x0000) - not-present page PGD 17ffee067 P4D 17ffee067 PUD 7ffd2067 PMD 0 Oops: Oops: 0000 [#1] SMP KASAN NOPTI CPU: 2 UID: 0 PID: 15946 Comm: syz.1.3210 Tainted: G L syzkaller #0 PREEMPT(full) Tainted: [L]=SOFTLOCKUP Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2~bpo12+1 04/01/2014 RIP: 0010:update_or_create_fnhe+0x112b/0x1600 net/ipv4/route.c:732 Code: 00 4a 8d 3c e5 20 bf d7 8d 48 89 fa 48 c1 ea 03 42 80 3c 32 00 0f 85 80 03 00 00 4e 03 2c e5 20 bf d7 8d 4c 89 e8 48 c1 e8 03 <42> 80 3c 30 00 0f 85 59 03 00 00 4d 8b 6d 00 e8 e1 84 a4 01 31 ff RSP: 0018:ffffc9000785f298 EFLAGS: 00010a06 RAX: 1ffff1101ad1ea00 RBX: ffff888028ebc320 RCX: ffffc900262e9000 RDX: 1ffffffff1baf7e4 RSI: ffffffff89d38228 RDI: ffffffff8dd7bf20 RBP: 0000000000000000 R08: 0000000000000005 R09: 0000000000000007 R10: 0000000000000000 R11: ffff888061cd0b30 R12: 0000000000000000 R13: ffff8880d68f5000 R14: dffffc0000000000 R15: ffffed10051d786b FS: 00007f56a53436c0(0000) GS:ffff8880d6af5000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: ffffed101ad1ea00 CR3: 000000004fa11000 CR4: 0000000000352ef0 Call Trace: __ip_rt_update_pmtu+0xa44/0x1320 net/ipv4/route.c:1063 ipv4_update_pmtu+0x2ac/0x360 net/ipv4/route.c:1098 ipip_err+0x6e8/0x840 net/ipv4/ipip.c:176 tunnelmpls4_err+0x88/0x210 net/ipv4/tunnel4.c:210 icmp_socket_deliver+0x1c2/0x410 net/ipv4/icmp.c:1043 icmp_unreach+0x3a4/0xfd0 net/ipv4/icmp.c:1163 icmp_rcv+0xafa/0x1140 net/ipv4/icmp.c:1491 ip_protocol_deliver_rcu+0x447/0x4c0 net/ipv4/ip_input.c:207 ip_local_deliver_finish+0x3f2/0x720 net/ipv4/ip_input.c:241 NF_HOOK include/linux/netfilter.h:318 [inline] NF_HOOK include/linux/netfilter.h:312 [inline] ip_local_deliver+0x18e/0x1f0 net/ipv4/ip_input.c:262 dst_input include/net/dst.h:474 [inline] ip_rcv_finish net/ipv4/ip_input.c:453 [inline] NF_HOOK include/linux/netfilter.h:318 [inline] NF_HOOK include/linux/netfilter.h:312 [inline] ip_rcv+0x2e0/0x600 net/ipv4/ip_input.c:573 __netif_receive_skb_one_core+0x197/0x1e0 net/core/dev.c:6139 __netif_receive_skb+0x1d/0x160 net/core/dev.c:6252 netif_receive_skb_internal net/core/dev.c:6338 [inline] netif_receive_skb+0x137/0x760 net/core/dev.c:6397 tun_rx_batched.isra.0+0x3ee/0x740 drivers/net/tun.c:1509 tun_get_user+0x28b2/0x3cc0 drivers/net/tun.c:1953 tun_chr_write_iter+0xdc/0x210 drivers/net/tun.c:1999 new_sync_write fs/read_write.c:593 [inline] vfs_write+0x7d3/0x11d0 fs/read_write.c:686 ksys_write+0x12a/0x250 fs/read_write.c:738 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xcd/0xf80 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f56a458e27f Code: 89 54 24 18 48 89 74 24 10 89 7c 24 08 e8 f9 92 02 00 48 8b 54 24 18 48 8b 74 24 10 41 89 c0 8b 7c 24 08 b8 01 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 31 44 89 c7 48 89 44 24 08 e8 4c 93 02 00 48 RSP: 002b:00007f56a5343000 EFLAGS: 00000293 ORIG_RAX: 0000000000000001 RAX: ffffffffffffffda RBX: 00007f56a47e6090 RCX: 00007f56a458e27f RDX: 0000000000000046 RSI: 0000200000000400 RDI: 00000000000000c8 RBP: 00007f56a4613f91 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000046 R11: 0000000000000293 R12: 0000000000000000 R13: 00007f56a47e6128 R14: 00007f56a47e6090 R15: 00007fff90bca798 Modules linked in: CR2: ffffed101ad1ea00 ---[ end trace 0000000000000000 ]--- RIP: 0010:update_or_create_fnhe+0x112b/0x1600 net/ipv4/route.c:732 Code: 00 4a 8d 3c e5 20 bf d7 8d 48 89 fa 48 c1 ea 03 42 80 3c 32 00 0f 85 80 03 00 00 4e 03 2c e5 20 bf d7 8d 4c 89 e8 48 c1 e8 03 <42> 80 3c 30 00 0f 85 59 03 00 00 4d 8b 6d 00 e8 e1 84 a4 01 31 ff RSP: 0018:ffffc9000785f298 EFLAGS: 00010a06 RAX: 1ffff1101ad1ea00 RBX: ffff888028ebc320 RCX: ffffc900262e9000 RDX: 1ffffffff1baf7e4 RSI: ffffffff89d38228 RDI: ffffffff8dd7bf20 RBP: 0000000000000000 R08: 0000000000000005 R09: 0000000000000007 R10: 0000000000000000 R11: ffff888061cd0b30 R12: 0000000000000000 R13: ffff8880d68f5000 R14: dffffc0000000000 R15: ffffed10051d786b FS: 00007f56a53436c0(0000) GS:ffff8880d6af5000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: ffffed101ad1ea00 CR3: 000000004fa11000 CR4: 0000000000352ef0 ---------------- Code disassembly (best guess): 0: 00 4a 8d add %cl,-0x73(%rdx) 3: 3c e5 cmp $0xe5,%al 5: 20 bf d7 8d 48 89 and %bh,-0x76b77229(%rdi) b: fa cli c: 48 c1 ea 03 shr $0x3,%rdx 10: 42 80 3c 32 00 cmpb $0x0,(%rdx,%r14,1) 15: 0f 85 80 03 00 00 jne 0x39b 1b: 4e 03 2c e5 20 bf d7 add -0x722840e0(,%r12,8),%r13 22: 8d 23: 4c 89 e8 mov %r13,%rax 26: 48 c1 e8 03 shr $0x3,%rax * 2a: 42 80 3c 30 00 cmpb $0x0,(%rax,%r14,1) <-- trapping instruction 2f: 0f 85 59 03 00 00 jne 0x38e 35: 4d 8b 6d 00 mov 0x0(%r13),%r13 39: e8 e1 84 a4 01 call 0x1a4851f 3e: 31 ff xor %edi,%edi