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:
<TASK>
__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
</TASK>
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