netlink: 12 bytes leftover after parsing attributes in process `syz-executor.1'. ------------[ cut here ]------------ kernel BUG at net/core/dev.c:2917! invalid opcode: 0000 [#1] PREEMPT SMP KASAN CPU: 0 PID: 29191 Comm: syz-executor.1 Not tainted 4.19.211-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:skb_checksum_help+0x851/0x9c0 net/core/dev.c:2917 Code: 00 00 00 00 00 fc ff df 48 c1 ea 03 80 3c 02 00 0f 84 eb fb ff ff 48 8b 7c 24 20 e8 49 6a 23 fb e9 dc fb ff ff e8 4f 8d ed fa <0f> 0b 4c 89 ef e8 e5 67 23 fb e9 dc f7 ff ff 4c 89 e7 e8 98 69 23 RSP: 0018:ffff8880496defe8 EFLAGS: 00010216 RAX: 0000000000040000 RBX: 00000000000003d2 RCX: ffffc90007ead000 RDX: 0000000000024bbe RSI: ffffffff8674f821 RDI: 0000000000000006 RBP: ffff8880b3fce480 R08: ffff8880496def78 R09: 00000000000003d4 R10: 0000000000000006 R11: 0000000000000000 R12: ffff8880b3fce504 R13: ffff8880b3fce510 R14: 000000000000534e R15: 00000000000000e0 kauditd_printk_skb: 4 callbacks suppressed audit: type=1800 audit(1637852319.637:9275): pid=29205 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="syz-executor.0" name="file0" dev="sda1" ino=15654 res=0 FS: 00007f45173a0700(0000) GS:ffff8880ba000000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000020f1dff8 CR3: 0000000094d54000 CR4: 00000000003426f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: skb_csum_hwoffload_help+0x8b/0x130 net/core/dev.c:3306 validate_xmit_skb+0x94a/0xd50 net/core/dev.c:3349 __dev_queue_xmit+0x963/0x2e00 net/core/dev.c:3830 neigh_hh_output include/net/neighbour.h:491 [inline] neigh_output include/net/neighbour.h:499 [inline] ip_finish_output2+0xb6d/0x15a0 net/ipv4/ip_output.c:230 ip_finish_output+0xae9/0x10b0 net/ipv4/ip_output.c:318 NF_HOOK_COND include/linux/netfilter.h:278 [inline] ip_output+0x203/0x5f0 net/ipv4/ip_output.c:406 dst_output include/net/dst.h:455 [inline] ip_local_out+0xaf/0x170 net/ipv4/ip_output.c:125 iptunnel_xmit+0x63b/0x9d0 net/ipv4/ip_tunnel_core.c:91 geneve_xmit_skb drivers/net/geneve.c:867 [inline] geneve_xmit+0x120d/0x2e60 drivers/net/geneve.c:943 __netdev_start_xmit include/linux/netdevice.h:4349 [inline] netdev_start_xmit include/linux/netdevice.h:4363 [inline] xmit_one net/core/dev.c:3256 [inline] dev_hard_start_xmit+0x1a8/0x920 net/core/dev.c:3272 sch_direct_xmit+0x2d6/0xf70 net/sched/sch_generic.c:332 qdisc_restart net/sched/sch_generic.c:395 [inline] __qdisc_run+0x4d0/0x1640 net/sched/sch_generic.c:403 __dev_xmit_skb net/core/dev.c:3500 [inline] __dev_queue_xmit+0x1518/0x2e00 net/core/dev.c:3807 packet_snd net/packet/af_packet.c:2988 [inline] packet_sendmsg+0x25ae/0x7720 net/packet/af_packet.c:3013 sock_sendmsg_nosec net/socket.c:651 [inline] sock_sendmsg+0xc3/0x120 net/socket.c:661 __sys_sendto+0x21a/0x320 net/socket.c:1899 audit: type=1800 audit(1637852319.637:9276): pid=29208 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="syz-executor.0" name="file0" dev="sda1" ino=15654 res=0 __do_sys_sendto net/socket.c:1911 [inline] __se_sys_sendto net/socket.c:1907 [inline] __x64_sys_sendto+0xdd/0x1b0 net/socket.c:1907 audit: type=1800 audit(1637852319.637:9277): pid=29209 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="syz-executor.5" name="file0" dev="sda1" ino=15655 res=0 do_syscall_64+0xf9/0x620 arch/x86/entry/common.c:293 audit: type=1800 audit(1637852319.637:9278): pid=29209 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="syz-executor.5" name="file0" dev="sda1" ino=15655 res=0 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x7f4519e2aae9 audit: type=1800 audit(1637852319.637:9279): pid=29210 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="syz-executor.4" name="file0" dev="sda1" ino=15656 res=0 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 bc ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007f45173a0188 EFLAGS: 00000246 ORIG_RAX: 000000000000002c RAX: ffffffffffffffda RBX: 00007f4519f3df60 RCX: 00007f4519e2aae9 RDX: 0000000000003287 RSI: 0000000020000080 RDI: 0000000000000004 RBP: 00007f4519e84f6d R08: 0000000000000000 R09: 00000000000002ff R10: 0000000004000002 R11: 0000000000000246 R12: 0000000000000000 audit: type=1800 audit(1637852319.637:9280): pid=29212 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="syz-executor.0" name="file0" dev="sda1" ino=15654 res=0 R13: 00007ffe0773438f R14: 00007f45173a0300 R15: 0000000000022000 Modules linked in: ---[ end trace 5637dfd0ac157d16 ]--- audit: type=1800 audit(1637852319.637:9281): pid=29209 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="syz-executor.5" name="file0" dev="sda1" ino=15655 res=0 RIP: 0010:skb_checksum_help+0x851/0x9c0 net/core/dev.c:2917 audit: type=1800 audit(1637852319.637:9282): pid=29209 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="syz-executor.5" name="file0" dev="sda1" ino=15655 res=0 Code: 00 00 00 00 00 fc ff df 48 c1 ea 03 80 3c 02 00 0f 84 eb fb ff ff 48 8b 7c 24 20 e8 49 6a 23 fb e9 dc fb ff ff e8 4f 8d ed fa <0f> 0b 4c 89 ef e8 e5 67 23 fb e9 dc f7 ff ff 4c 89 e7 e8 98 69 23 RSP: 0018:ffff8880496defe8 EFLAGS: 00010216 RAX: 0000000000040000 RBX: 00000000000003d2 RCX: ffffc90007ead000 RDX: 0000000000024bbe RSI: ffffffff8674f821 RDI: 0000000000000006 RBP: ffff8880b3fce480 R08: ffff8880496def78 R09: 00000000000003d4 R10: 0000000000000006 R11: 0000000000000000 R12: ffff8880b3fce504 R13: ffff8880b3fce510 R14: 000000000000534e R15: 00000000000000e0 FS: 00007f45173a0700(0000) GS:ffff8880ba000000(0000) knlGS:0000000000000000 audit: type=1800 audit(1637852319.997:9283): pid=29210 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="syz-executor.4" name="file0" dev="sda1" ino=15656 res=0 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000020f1dff8 CR3: 0000000094d54000 CR4: 00000000003426f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 ---------------- Code disassembly (best guess), 1 bytes skipped: 0: ff c3 inc %ebx 2: 66 2e 0f 1f 84 00 00 nopw %cs:0x0(%rax,%rax,1) 9: 00 00 00 c: 0f 1f 40 00 nopl 0x0(%rax) 10: 48 89 f8 mov %rdi,%rax 13: 48 89 f7 mov %rsi,%rdi 16: 48 89 d6 mov %rdx,%rsi 19: 48 89 ca mov %rcx,%rdx 1c: 4d 89 c2 mov %r8,%r10 1f: 4d 89 c8 mov %r9,%r8 22: 4c 8b 4c 24 08 mov 0x8(%rsp),%r9 27: 0f 05 syscall * 29: 48 3d 01 f0 ff ff cmp $0xfffffffffffff001,%rax <-- trapping instruction 2f: 73 01 jae 0x32 31: c3 retq 32: 48 c7 c1 bc ff ff ff mov $0xffffffffffffffbc,%rcx 39: f7 d8 neg %eax 3b: 64 89 01 mov %eax,%fs:(%rcx) 3e: 48 rex.W