Hello, syzbot found the following crash on: HEAD commit: d0f41851 net, ip_tunnel: fix namespaces move git tree: net console output: https://syzkaller.appspot.com/x/log.txt?x=10e94d85e00000 kernel config: https://syzkaller.appspot.com/x/.config?x=d9290aeb7e6cf1c4 dashboard link: https://syzkaller.appspot.com/bug?extid=8ce4113dadc4789fac74 compiler: gcc (GCC) 9.0.0 20181231 (experimental) syz repro: https://syzkaller.appspot.com/x/repro.syz?x=11f99369e00000 C reproducer: https://syzkaller.appspot.com/x/repro.c?x=13d85601e00000 IMPORTANT: if you fix the bug, please add the following tag to the commit: Reported-by: syzbot+8ce4113dadc4789fac74@xxxxxxxxxxxxxxxxxxxxxxxxx ------------[ cut here ]------------ Illegal XDP return value 4294967274, expect packet loss! WARNING: CPU: 0 PID: 9780 at net/core/filter.c:6918 bpf_warn_invalid_xdp_action net/core/filter.c:6918 [inline] WARNING: CPU: 0 PID: 9780 at net/core/filter.c:6918 bpf_warn_invalid_xdp_action+0x77/0x90 net/core/filter.c:6914 Kernel panic - not syncing: panic_on_warn set ... CPU: 0 PID: 9780 Comm: syz-executor429 Not tainted 5.5.0-rc6-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: <IRQ> __dump_stack lib/dump_stack.c:77 [inline] dump_stack+0x197/0x210 lib/dump_stack.c:118 panic+0x2e3/0x75c kernel/panic.c:221 __warn.cold+0x2f/0x3e kernel/panic.c:582 report_bug+0x289/0x300 lib/bug.c:195 fixup_bug arch/x86/kernel/traps.c:174 [inline] fixup_bug arch/x86/kernel/traps.c:169 [inline] do_error_trap+0x11b/0x200 arch/x86/kernel/traps.c:267 do_invalid_op+0x37/0x50 arch/x86/kernel/traps.c:286 invalid_op+0x23/0x30 arch/x86/entry/entry_64.S:1027 RIP: 0010:bpf_warn_invalid_xdp_action net/core/filter.c:6918 [inline] RIP: 0010:bpf_warn_invalid_xdp_action+0x77/0x90 net/core/filter.c:6914 Code: 00 f9 d6 88 41 83 fc 04 48 c7 c6 40 f9 d6 88 4c 0f 46 ee e8 2b 9e 49 fb 44 89 e2 48 c7 c7 80 f9 d6 88 4c 89 ee e8 18 4e 1a fb <0f> 0b e8 12 9e 49 fb 5b 41 5c 41 5d 5d c3 90 66 2e 0f 1f 84 00 00 RSP: 0018:ffffc900000079a8 EFLAGS: 00010286 RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000000 RDX: 0000000000000100 RSI: ffffffff815e5326 RDI: fffff52000000f27 RBP: ffffc900000079c0 R08: ffff88809ff963c0 R09: ffffed1015d045c9 R10: ffffed1015d045c8 R11: ffff8880ae822e43 R12: 00000000ffffffea R13: ffffffff88d6f900 R14: ffff8880927ea110 R15: ffff88809e257180 netif_receive_generic_xdp net/core/dev.c:4564 [inline] do_xdp_generic.part.0+0xebb/0x1790 net/core/dev.c:4613 do_xdp_generic net/core/dev.c:4985 [inline] __netif_receive_skb_core+0x68b/0x30b0 net/core/dev.c:4985 __netif_receive_skb_one_core+0xa8/0x1a0 net/core/dev.c:5148 __netif_receive_skb+0x2c/0x1d0 net/core/dev.c:5264 process_backlog+0x206/0x750 net/core/dev.c:6095 napi_poll net/core/dev.c:6532 [inline] net_rx_action+0x508/0x1120 net/core/dev.c:6600 __do_softirq+0x262/0x98c kernel/softirq.c:292 invoke_softirq kernel/softirq.c:373 [inline] irq_exit+0x19b/0x1e0 kernel/softirq.c:413 exiting_irq arch/x86/include/asm/apic.h:536 [inline] smp_apic_timer_interrupt+0x1a3/0x610 arch/x86/kernel/apic/apic.c:1137 apic_timer_interrupt+0xf/0x20 arch/x86/entry/entry_64.S:829 </IRQ> RIP: 0010:arch_local_irq_restore arch/x86/include/asm/paravirt.h:752 [inline] RIP: 0010:console_unlock+0xbb8/0xf00 kernel/printk/printk.c:2481 Code: 93 89 48 c1 e8 03 42 80 3c 30 00 0f 85 e4 02 00 00 48 83 3d c1 43 35 08 00 0f 84 91 01 00 00 e8 3e 05 17 00 48 8b 7d 98 57 9d <0f> 1f 44 00 00 e9 6d ff ff ff e8 29 05 17 00 48 8b 7d 08 c7 05 1b RSP: 0018:ffffc90001f26b38 EFLAGS: 00000293 ORIG_RAX: ffffffffffffff13 RAX: ffff88809ff963c0 RBX: 0000000000000200 RCX: 0000000000000006 RDX: 0000000000000000 RSI: ffffffff815defe2 RDI: 0000000000000293 RBP: ffffc90001f26bc0 R08: 1ffffffff165e79c R09: fffffbfff165e79d R10: fffffbfff165e79c R11: ffffffff8b2f3ce7 R12: 0000000000000000 R13: ffffffff84b35860 R14: dffffc0000000000 R15: ffffffff8a0fc990 vprintk_emit+0x2a0/0x700 kernel/printk/printk.c:1996 vprintk_default+0x28/0x30 kernel/printk/printk.c:2023 vprintk_func+0x7e/0x189 kernel/printk/printk_safe.c:386 printk+0xba/0xed kernel/printk/printk.c:2056 validate_nla lib/nlattr.c:178 [inline] __nla_validate_parse.cold+0x4d/0x60 lib/nlattr.c:381 __nla_parse+0x43/0x60 lib/nlattr.c:478 nla_parse_nested_deprecated include/net/netlink.h:1166 [inline] do_setlink+0x2ca2/0x3720 net/core/rtnetlink.c:2773 rtnl_group_changelink net/core/rtnetlink.c:3089 [inline] __rtnl_newlink+0xdd2/0x1790 net/core/rtnetlink.c:3243 rtnl_newlink+0x69/0xa0 net/core/rtnetlink.c:3363 rtnetlink_rcv_msg+0x45e/0xaf0 net/core/rtnetlink.c:5424 netlink_rcv_skb+0x177/0x450 net/netlink/af_netlink.c:2477 rtnetlink_rcv+0x1d/0x30 net/core/rtnetlink.c:5442 netlink_unicast_kernel net/netlink/af_netlink.c:1302 [inline] netlink_unicast+0x58c/0x7d0 net/netlink/af_netlink.c:1328 netlink_sendmsg+0x91c/0xea0 net/netlink/af_netlink.c:1917 sock_sendmsg_nosec net/socket.c:639 [inline] sock_sendmsg+0xd7/0x130 net/socket.c:659 ____sys_sendmsg+0x753/0x880 net/socket.c:2330 ___sys_sendmsg+0x100/0x170 net/socket.c:2384 __sys_sendmsg+0x105/0x1d0 net/socket.c:2417 __do_sys_sendmsg net/socket.c:2426 [inline] __se_sys_sendmsg net/socket.c:2424 [inline] __x64_sys_sendmsg+0x78/0xb0 net/socket.c:2424 do_syscall_64+0xfa/0x790 arch/x86/entry/common.c:294 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x442af9 Code: 18 89 d0 c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 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 0f 83 7b 10 fc ff c3 66 2e 0f 1f 84 00 00 00 00 RSP: 002b:00007ffd3ded00a8 EFLAGS: 00000246 ORIG_RAX: 000000000000002e RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 0000000000442af9 RDX: 0000000000000000 RSI: 0000000020000140 RDI: 0000000000000003 RBP: 00007ffd3ded00c0 R08: 0000000001bbbbbb R09: 0000000001bbbbbb R10: 0000000001bbbbbb R11: 0000000000000246 R12: 0000000000000000 R13: 0000000000404090 R14: 0000000000000000 R15: 0000000000000000 Kernel Offset: disabled Rebooting in 86400 seconds.. --- This bug is generated by a bot. 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