Oops: general protection fault, probably for non-canonical address 0xdffffc000000000e: 0000 [#1] PREEMPT SMP KASAN NOPTI
KASAN: null-ptr-deref in range [0x0000000000000070-0x0000000000000077]
CPU: 0 UID: 0 PID: 11706 Comm: syz.2.1629 Not tainted 6.14.0-rc4-syzkaller #0
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2~bpo12+1 04/01/2014
RIP: 0010:skb_segment+0x193b/0x40b0 net/core/skbuff.c:4712
Code: 00 00 fe e9 54 eb ff ff e8 32 81 8b f8 48 8b 84 24 d0 00 00 00 48 8d 78 70 48 b8 00 00 00 00 00 fc ff df 48 89 fa 48 c1 ea 03 <0f> b6 04 02 84 c0 74 09 3c 03 7f 05 e8 34 96 ee f8 48 8b 84 24 d0
RSP: 0018:ffffc90000006668 EFLAGS: 00010202
RAX: dffffc0000000000 RBX: 0000000000020048 RCX: ffffffff892e4e6b
RDX: 000000000000000e RSI: ffffffff892e5ebe RDI: 0000000000000070
RBP: ffffc90000006810 R08: 0000000000000005 R09: 000000000000ffff
R10: 000000000000ffff R11: aaaa0aaaaaaaaaaa R12: ffff88804467b240
R13: 000000000001fffe R14: 000000000001fffe R15: 000000000000ffff
FS: 00007f94665f66c0(0000) GS:ffff88806a600000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000040000003f000 CR3: 0000000047642000 CR4: 0000000000352ef0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
tcp_gso_segment+0x3ca/0x1940 net/ipv4/tcp_offload.c:176
tcp6_gso_segment net/ipv6/tcpv6_offload.c:184 [inline]
tcp6_gso_segment+0x207/0x1570 net/ipv6/tcpv6_offload.c:151
ipv6_gso_segment+0x80b/0x1d90 net/ipv6/ip6_offload.c:152
skb_mac_gso_segment+0x2a6/0x650 net/core/gso.c:53
__skb_gso_segment+0x36e/0x700 net/core/gso.c:124
skb_gso_segment include/net/gso.h:83 [inline]
validate_xmit_skb+0x669/0xf90 net/core/dev.c:3893
validate_xmit_skb_list+0xc1/0x130 net/core/dev.c:3943
sch_direct_xmit+0x398/0xc30 net/sched/sch_generic.c:328
__dev_xmit_skb net/core/dev.c:4095 [inline]
__dev_queue_xmit+0x2d4d/0x43e0 net/core/dev.c:4621
dev_queue_xmit include/linux/netdevice.h:3313 [inline]
neigh_hh_output include/net/neighbour.h:523 [inline]
neigh_output include/net/neighbour.h:537 [inline]
ip6_finish_output2+0xed9/0x20a0 net/ipv6/ip6_output.c:141
__ip6_finish_output net/ipv6/ip6_output.c:215 [inline]
ip6_finish_output+0x3f9/0x1360 net/ipv6/ip6_output.c:226
NF_HOOK_COND include/linux/netfilter.h:303 [inline]
ip6_output+0x1f8/0x540 net/ipv6/ip6_output.c:247
dst_output include/net/dst.h:459 [inline]
NF_HOOK include/linux/netfilter.h:314 [inline]
NF_HOOK include/linux/netfilter.h:308 [inline]
ip6_xmit+0x12d2/0x2300 net/ipv6/ip6_output.c:366
inet6_csk_xmit+0x3ce/0x740 net/ipv6/inet6_connection_sock.c:135
__tcp_transmit_skb+0x1b02/0x3ec0 net/ipv4/tcp_output.c:1471
tcp_transmit_skb net/ipv4/tcp_output.c:1489 [inline]
tcp_write_xmit+0x12b1/0x8560 net/ipv4/tcp_output.c:2832
__tcp_push_pending_frames+0xaf/0x390 net/ipv4/tcp_output.c:3015
tcp_push_pending_frames include/net/tcp.h:2124 [inline]
tcp_data_snd_check net/ipv4/tcp_input.c:5753 [inline]
tcp_rcv_state_process+0x1049/0x4c40 net/ipv4/tcp_input.c:7003
tcp_v6_do_rcv+0x492/0x1740 net/ipv6/tcp_ipv6.c:1667
tcp_v6_rcv+0x30b3/0x3fd0 net/ipv6/tcp_ipv6.c:1914
ip6_protocol_deliver_rcu+0x180/0x1510 net/ipv6/ip6_input.c:436
ip6_input_finish+0x102/0x180 net/ipv6/ip6_input.c:480
NF_HOOK include/linux/netfilter.h:314 [inline]
NF_HOOK include/linux/netfilter.h:308 [inline]
ip6_input+0x105/0x2f0 net/ipv6/ip6_input.c:491
dst_input include/net/dst.h:469 [inline]
ip6_rcv_finish net/ipv6/ip6_input.c:79 [inline]
NF_HOOK include/linux/netfilter.h:314 [inline]
NF_HOOK include/linux/netfilter.h:308 [inline]
ipv6_rcv+0x265/0x680 net/ipv6/ip6_input.c:309
__netif_receive_skb_one_core+0x12e/0x1e0 net/core/dev.c:5899
__netif_receive_skb+0x1d/0x160 net/core/dev.c:6012
process_backlog+0x443/0x15f0 net/core/dev.c:6360
__napi_poll.constprop.0+0xb7/0x550 net/core/dev.c:7194
napi_poll net/core/dev.c:7263 [inline]
net_rx_action+0xa94/0x1010 net/core/dev.c:7385
handle_softirqs+0x213/0x8f0 kernel/softirq.c:561
do_softirq kernel/softirq.c:462 [inline]
do_softirq+0xb2/0xf0 kernel/softirq.c:449
__local_bh_enable_ip+0x100/0x120 kernel/softirq.c:389
sk_wait_data+0x1ab/0x510 net/core/sock.c:3154
tcp_recvmsg_locked+0x807/0x2780 net/ipv4/tcp.c:2720
tcp_recvmsg+0x12e/0x680 net/ipv4/tcp.c:2871
inet6_recvmsg+0x12b/0x6a0 net/ipv6/af_inet6.c:678
sock_recvmsg_nosec net/socket.c:1023 [inline]
sock_recvmsg+0xfe/0x250 net/socket.c:1045
____sys_recvmsg+0x219/0x6b0 net/socket.c:2793
___sys_recvmsg+0x115/0x1a0 net/socket.c:2835
__sys_recvmsg+0x16b/0x220 net/socket.c:2868
do_syscall_x64 arch/x86/entry/common.c:52 [inline]
do_syscall_64+0xcd/0x250 arch/x86/entry/common.c:83
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f946878d169
Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 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 73 01 c3 48 c7 c1 a8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f94665f6038 EFLAGS: 00000246 ORIG_RAX: 000000000000002f
RAX: ffffffffffffffda RBX: 00007f94689a5fa0 RCX: 00007f946878d169
RDX: 0000000040000110 RSI: 00004000000008c0 RDI: 0000000000000004
RBP: 00007f946880e2a0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 00007f94689a5fa0 R15: 00007ffe4c7dfe18
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:skb_segment+0x193b/0x40b0 net/core/skbuff.c:4712
Code: 00 00 fe e9 54 eb ff ff e8 32 81 8b f8 48 8b 84 24 d0 00 00 00 48 8d 78 70 48 b8 00 00 00 00 00 fc ff df 48 89 fa 48 c1 ea 03 <0f> b6 04 02 84 c0 74 09 3c 03 7f 05 e8 34 96 ee f8 48 8b 84 24 d0
RSP: 0018:ffffc90000006668 EFLAGS: 00010202
RAX: dffffc0000000000 RBX: 0000000000020048 RCX: ffffffff892e4e6b
RDX: 000000000000000e RSI: ffffffff892e5ebe RDI: 0000000000000070
RBP: ffffc90000006810 R08: 0000000000000005 R09: 000000000000ffff
R10: 000000000000ffff R11: aaaa0aaaaaaaaaaa R12: ffff88804467b240
R13: 000000000001fffe R14: 000000000001fffe R15: 000000000000ffff
FS: 00007f94665f66c0(0000) GS:ffff88806a600000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000040000003f000 CR3: 0000000047642000 CR4: 0000000000352ef0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
----------------
Code disassembly (best guess), 1 bytes skipped:
0: 00 fe add %bh,%dh
2: e9 54 eb ff ff jmp 0xffffeb5b
7: e8 32 81 8b f8 call 0xf88b813e
c: 48 8b 84 24 d0 00 00 mov 0xd0(%rsp),%rax
13: 00
14: 48 8d 78 70 lea 0x70(%rax),%rdi
18: 48 b8 00 00 00 00 00 movabs $0xdffffc0000000000,%rax
1f: fc ff df
22: 48 89 fa mov %rdi,%rdx
25: 48 c1 ea 03 shr $0x3,%rdx
* 29: 0f b6 04 02 movzbl (%rdx,%rax,1),%eax <-- trapping instruction
2d: 84 c0 test %al,%al
2f: 74 09 je 0x3a
31: 3c 03 cmp $0x3,%al
33: 7f 05 jg 0x3a
35: e8 34 96 ee f8 call 0xf8ee966e
3a: 48 rex.W
3b: 8b .byte 0x8b
3c: 84 24 d0 test %ah,(%rax,%rdx,8)