=====================================================
BUG: KMSAN: uninit-value in ip_rcv_core+0xf4c/0x1480 net/ipv4/ip_input.c:476
CPU: 0 PID: 8431 Comm: syz-executor925 Not tainted 5.11.0-rc7-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:79 [inline]
 dump_stack+0x21c/0x280 lib/dump_stack.c:120
 kmsan_report+0xfb/0x1e0 mm/kmsan/kmsan_report.c:118
 __msan_warning+0x5f/0xa0 mm/kmsan/kmsan_instr.c:197
 ip_rcv_core+0xf4c/0x1480 net/ipv4/ip_input.c:476
 ip_rcv+0xc7/0x820 net/ipv4/ip_input.c:535
 __netif_receive_skb_one_core net/core/dev.c:5323 [inline]
 __netif_receive_skb+0x1ec/0x640 net/core/dev.c:5437
 process_backlog+0x517/0xbd0 net/core/dev.c:6328
 napi_poll+0x428/0x15c0 net/core/dev.c:6806
 net_rx_action+0x34c/0xd30 net/core/dev.c:6889
 __do_softirq+0x1b9/0x715 kernel/softirq.c:343
 asm_call_irq_on_stack+0xf/0x20
 </IRQ>
 __run_on_irqstack arch/x86/include/asm/irq_stack.h:26 [inline]
 run_on_irqstack_cond arch/x86/include/asm/irq_stack.h:77 [inline]
 do_softirq_own_stack+0x6e/0x90 arch/x86/kernel/irq_64.c:77
 do_softirq kernel/softirq.c:246 [inline]
 __local_bh_enable_ip+0x184/0x1d0 kernel/softirq.c:196
 local_bh_enable+0x36/0x40 include/linux/bottom_half.h:32
 rcu_read_unlock_bh include/linux/rcupdate.h:737 [inline]
 __dev_queue_xmit+0x3b3e/0x45c0 net/core/dev.c:4178
 dev_queue_xmit+0x4b/0x60 net/core/dev.c:4184
 packet_snd net/packet/af_packet.c:3006 [inline]
 packet_sendmsg+0x8778/0x9a60 net/packet/af_packet.c:3031
 sock_sendmsg_nosec net/socket.c:652 [inline]
 sock_sendmsg net/socket.c:672 [inline]
 ____sys_sendmsg+0xcfc/0x12f0 net/socket.c:2345
 ___sys_sendmsg net/socket.c:2399 [inline]
 __sys_sendmsg+0x714/0x830 net/socket.c:2432
 __do_sys_sendmsg net/socket.c:2441 [inline]
 __se_sys_sendmsg+0x97/0xb0 net/socket.c:2439
 __x64_sys_sendmsg+0x4a/0x70 net/socket.c:2439
 do_syscall_64+0x9f/0x140 arch/x86/entry/common.c:48
 entry_SYSCALL_64_after_hwframe+0x44/0xa9
RIP: 0033:0x443df9
Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 41 15 00 00 90 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 c0 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007ffc5bc4d068 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 0000000000443df9
RDX: 0000000000000000 RSI: 0000000020001440 RDI: 0000000000000003
RBP: 0000000000000000 R08: 0000000000f0b5ff R09: 0000000000f0b5ff
R10: 00007ffc5bc4cae0 R11: 0000000000000246 R12: 00007ffc5bc4d0a0
R13: 00007ffc5bc4d090 R14: 00007ffc5bc4d080 R15: 0000000000000003

Uninit was stored to memory at:
 kmsan_save_stack_with_flags mm/kmsan/kmsan.c:121 [inline]
 kmsan_internal_chain_origin+0xad/0x130 mm/kmsan/kmsan.c:289
 __msan_chain_origin+0x57/0xa0 mm/kmsan/kmsan_instr.c:147
 iptunnel_xmit+0xbd6/0xf20 net/ipv4/ip_tunnel_core.c:76
 udp_tunnel_xmit_skb+0x526/0x640 net/ipv4/udp_tunnel_core.c:190
 geneve_xmit_skb drivers/net/geneve.c:959 [inline]
 geneve_xmit+0x209e/0x3c20 drivers/net/geneve.c:1059
 __netdev_start_xmit include/linux/netdevice.h:4778 [inline]
 netdev_start_xmit include/linux/netdevice.h:4792 [inline]
 xmit_one+0x2b6/0x760 net/core/dev.c:3574
 dev_hard_start_xmit net/core/dev.c:3590 [inline]
 __dev_queue_xmit+0x3426/0x45c0 net/core/dev.c:4151
 dev_queue_xmit+0x4b/0x60 net/core/dev.c:4184
 packet_snd net/packet/af_packet.c:3006 [inline]
 packet_sendmsg+0x8778/0x9a60 net/packet/af_packet.c:3031
 sock_sendmsg_nosec net/socket.c:652 [inline]
 sock_sendmsg net/socket.c:672 [inline]
 ____sys_sendmsg+0xcfc/0x12f0 net/socket.c:2345
 ___sys_sendmsg net/socket.c:2399 [inline]
 __sys_sendmsg+0x714/0x830 net/socket.c:2432
 __do_sys_sendmsg net/socket.c:2441 [inline]
 __se_sys_sendmsg+0x97/0xb0 net/socket.c:2439
 __x64_sys_sendmsg+0x4a/0x70 net/socket.c:2439
 do_syscall_64+0x9f/0x140 arch/x86/entry/common.c:48
 entry_SYSCALL_64_after_hwframe+0x44/0xa9

Uninit was created at:
 kmsan_save_stack_with_flags mm/kmsan/kmsan.c:121 [inline]
 kmsan_internal_poison_shadow+0x5c/0xf0 mm/kmsan/kmsan.c:104
 kmsan_slab_alloc+0x8d/0xe0 mm/kmsan/kmsan_hooks.c:76
 slab_alloc_node mm/slub.c:2907 [inline]
 __kmalloc_node_track_caller+0xa37/0x1430 mm/slub.c:4527
 __kmalloc_reserve net/core/skbuff.c:142 [inline]
 __alloc_skb+0x2f8/0xb30 net/core/skbuff.c:210
 alloc_skb include/linux/skbuff.h:1099 [inline]
 alloc_skb_with_frags+0x1f3/0xc10 net/core/skbuff.c:5894
 sock_alloc_send_pskb+0xdc1/0xf90 net/core/sock.c:2348
 packet_alloc_skb net/packet/af_packet.c:2854 [inline]
 packet_snd net/packet/af_packet.c:2949 [inline]
 packet_sendmsg+0x6aab/0x9a60 net/packet/af_packet.c:3031
 sock_sendmsg_nosec net/socket.c:652 [inline]
 sock_sendmsg net/socket.c:672 [inline]
 ____sys_sendmsg+0xcfc/0x12f0 net/socket.c:2345
 ___sys_sendmsg net/socket.c:2399 [inline]
 __sys_sendmsg+0x714/0x830 net/socket.c:2432
 __do_sys_sendmsg net/socket.c:2441 [inline]
 __se_sys_sendmsg+0x97/0xb0 net/socket.c:2439
 __x64_sys_sendmsg+0x4a/0x70 net/socket.c:2439
 do_syscall_64+0x9f/0x140 arch/x86/entry/common.c:48
 entry_SYSCALL_64_after_hwframe+0x44/0xa9
=====================================================
=====================================================
BUG: KMSAN: uninit-value in ip_rcv_core+0xf5d/0x1480 net/ipv4/ip_input.c:476
CPU: 0 PID: 8431 Comm: syz-executor925 Tainted: G    B             5.11.0-rc7-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:79 [inline]
 dump_stack+0x21c/0x280 lib/dump_stack.c:120
 kmsan_report+0xfb/0x1e0 mm/kmsan/kmsan_report.c:118
 __msan_warning+0x5f/0xa0 mm/kmsan/kmsan_instr.c:197
 ip_rcv_core+0xf5d/0x1480 net/ipv4/ip_input.c:476
 ip_rcv+0xc7/0x820 net/ipv4/ip_input.c:535
 __netif_receive_skb_one_core net/core/dev.c:5323 [inline]
 __netif_receive_skb+0x1ec/0x640 net/core/dev.c:5437
 process_backlog+0x517/0xbd0 net/core/dev.c:6328
 napi_poll+0x428/0x15c0 net/core/dev.c:6806
 net_rx_action+0x34c/0xd30 net/core/dev.c:6889
 __do_softirq+0x1b9/0x715 kernel/softirq.c:343
 asm_call_irq_on_stack+0xf/0x20
 </IRQ>
 __run_on_irqstack arch/x86/include/asm/irq_stack.h:26 [inline]
 run_on_irqstack_cond arch/x86/include/asm/irq_stack.h:77 [inline]
 do_softirq_own_stack+0x6e/0x90 arch/x86/kernel/irq_64.c:77
 do_softirq kernel/softirq.c:246 [inline]
 __local_bh_enable_ip+0x184/0x1d0 kernel/softirq.c:196
 local_bh_enable+0x36/0x40 include/linux/bottom_half.h:32
 rcu_read_unlock_bh include/linux/rcupdate.h:737 [inline]
 __dev_queue_xmit+0x3b3e/0x45c0 net/core/dev.c:4178
 dev_queue_xmit+0x4b/0x60 net/core/dev.c:4184
 packet_snd net/packet/af_packet.c:3006 [inline]
 packet_sendmsg+0x8778/0x9a60 net/packet/af_packet.c:3031
 sock_sendmsg_nosec net/socket.c:652 [inline]
 sock_sendmsg net/socket.c:672 [inline]
 ____sys_sendmsg+0xcfc/0x12f0 net/socket.c:2345
 ___sys_sendmsg net/socket.c:2399 [inline]
 __sys_sendmsg+0x714/0x830 net/socket.c:2432
 __do_sys_sendmsg net/socket.c:2441 [inline]
 __se_sys_sendmsg+0x97/0xb0 net/socket.c:2439
 __x64_sys_sendmsg+0x4a/0x70 net/socket.c:2439
 do_syscall_64+0x9f/0x140 arch/x86/entry/common.c:48
 entry_SYSCALL_64_after_hwframe+0x44/0xa9
RIP: 0033:0x443df9
Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 41 15 00 00 90 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 c0 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007ffc5bc4d068 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 0000000000443df9
RDX: 0000000000000000 RSI: 0000000020001440 RDI: 0000000000000003
RBP: 0000000000000000 R08: 0000000000f0b5ff R09: 0000000000f0b5ff
R10: 00007ffc5bc4cae0 R11: 0000000000000246 R12: 00007ffc5bc4d0a0
R13: 00007ffc5bc4d090 R14: 00007ffc5bc4d080 R15: 0000000000000003

Uninit was stored to memory at:
 kmsan_save_stack_with_flags mm/kmsan/kmsan.c:121 [inline]
 kmsan_internal_chain_origin+0xad/0x130 mm/kmsan/kmsan.c:289
 __msan_chain_origin+0x57/0xa0 mm/kmsan/kmsan_instr.c:147
 iptunnel_xmit+0xbd6/0xf20 net/ipv4/ip_tunnel_core.c:76
 udp_tunnel_xmit_skb+0x526/0x640 net/ipv4/udp_tunnel_core.c:190
 geneve_xmit_skb drivers/net/geneve.c:959 [inline]
 geneve_xmit+0x209e/0x3c20 drivers/net/geneve.c:1059
 __netdev_start_xmit include/linux/netdevice.h:4778 [inline]
 netdev_start_xmit include/linux/netdevice.h:4792 [inline]
 xmit_one+0x2b6/0x760 net/core/dev.c:3574
 dev_hard_start_xmit net/core/dev.c:3590 [inline]
 __dev_queue_xmit+0x3426/0x45c0 net/core/dev.c:4151
 dev_queue_xmit+0x4b/0x60 net/core/dev.c:4184
 packet_snd net/packet/af_packet.c:3006 [inline]
 packet_sendmsg+0x8778/0x9a60 net/packet/af_packet.c:3031
 sock_sendmsg_nosec net/socket.c:652 [inline]
 sock_sendmsg net/socket.c:672 [inline]
 ____sys_sendmsg+0xcfc/0x12f0 net/socket.c:2345
 ___sys_sendmsg net/socket.c:2399 [inline]
 __sys_sendmsg+0x714/0x830 net/socket.c:2432
 __do_sys_sendmsg net/socket.c:2441 [inline]
 __se_sys_sendmsg+0x97/0xb0 net/socket.c:2439
 __x64_sys_sendmsg+0x4a/0x70 net/socket.c:2439
 do_syscall_64+0x9f/0x140 arch/x86/entry/common.c:48
 entry_SYSCALL_64_after_hwframe+0x44/0xa9

Uninit was created at:
 kmsan_save_stack_with_flags mm/kmsan/kmsan.c:121 [inline]
 kmsan_internal_poison_shadow+0x5c/0xf0 mm/kmsan/kmsan.c:104
 kmsan_slab_alloc+0x8d/0xe0 mm/kmsan/kmsan_hooks.c:76
 slab_alloc_node mm/slub.c:2907 [inline]
 __kmalloc_node_track_caller+0xa37/0x1430 mm/slub.c:4527
 __kmalloc_reserve net/core/skbuff.c:142 [inline]
 __alloc_skb+0x2f8/0xb30 net/core/skbuff.c:210
 alloc_skb include/linux/skbuff.h:1099 [inline]
 alloc_skb_with_frags+0x1f3/0xc10 net/core/skbuff.c:5894
 sock_alloc_send_pskb+0xdc1/0xf90 net/core/sock.c:2348
 packet_alloc_skb net/packet/af_packet.c:2854 [inline]
 packet_snd net/packet/af_packet.c:2949 [inline]
 packet_sendmsg+0x6aab/0x9a60 net/packet/af_packet.c:3031
 sock_sendmsg_nosec net/socket.c:652 [inline]
 sock_sendmsg net/socket.c:672 [inline]
 ____sys_sendmsg+0xcfc/0x12f0 net/socket.c:2345
 ___sys_sendmsg net/socket.c:2399 [inline]
 __sys_sendmsg+0x714/0x830 net/socket.c:2432
 __do_sys_sendmsg net/socket.c:2441 [inline]
 __se_sys_sendmsg+0x97/0xb0 net/socket.c:2439
 __x64_sys_sendmsg+0x4a/0x70 net/socket.c:2439
 do_syscall_64+0x9f/0x140 arch/x86/entry/common.c:48
 entry_SYSCALL_64_after_hwframe+0x44/0xa9
=====================================================
=====================================================
BUG: KMSAN: uninit-value in ip_rcv_core+0x1068/0x1480 net/ipv4/ip_input.c:485
CPU: 0 PID: 8431 Comm: syz-executor925 Tainted: G    B             5.11.0-rc7-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:79 [inline]
 dump_stack+0x21c/0x280 lib/dump_stack.c:120
 kmsan_report+0xfb/0x1e0 mm/kmsan/kmsan_report.c:118
 __msan_warning+0x5f/0xa0 mm/kmsan/kmsan_instr.c:197
 ip_rcv_core+0x1068/0x1480 net/ipv4/ip_input.c:485
 ip_rcv+0xc7/0x820 net/ipv4/ip_input.c:535
 __netif_receive_skb_one_core net/core/dev.c:5323 [inline]
 __netif_receive_skb+0x1ec/0x640 net/core/dev.c:5437
 process_backlog+0x517/0xbd0 net/core/dev.c:6328
 napi_poll+0x428/0x15c0 net/core/dev.c:6806
 net_rx_action+0x34c/0xd30 net/core/dev.c:6889
 __do_softirq+0x1b9/0x715 kernel/softirq.c:343
 asm_call_irq_on_stack+0xf/0x20
 </IRQ>
 __run_on_irqstack arch/x86/include/asm/irq_stack.h:26 [inline]
 run_on_irqstack_cond arch/x86/include/asm/irq_stack.h:77 [inline]
 do_softirq_own_stack+0x6e/0x90 arch/x86/kernel/irq_64.c:77
 do_softirq kernel/softirq.c:246 [inline]
 __local_bh_enable_ip+0x184/0x1d0 kernel/softirq.c:196
 local_bh_enable+0x36/0x40 include/linux/bottom_half.h:32
 rcu_read_unlock_bh include/linux/rcupdate.h:737 [inline]
 __dev_queue_xmit+0x3b3e/0x45c0 net/core/dev.c:4178
 dev_queue_xmit+0x4b/0x60 net/core/dev.c:4184
 packet_snd net/packet/af_packet.c:3006 [inline]
 packet_sendmsg+0x8778/0x9a60 net/packet/af_packet.c:3031
 sock_sendmsg_nosec net/socket.c:652 [inline]
 sock_sendmsg net/socket.c:672 [inline]
 ____sys_sendmsg+0xcfc/0x12f0 net/socket.c:2345
 ___sys_sendmsg net/socket.c:2399 [inline]
 __sys_sendmsg+0x714/0x830 net/socket.c:2432
 __do_sys_sendmsg net/socket.c:2441 [inline]
 __se_sys_sendmsg+0x97/0xb0 net/socket.c:2439
 __x64_sys_sendmsg+0x4a/0x70 net/socket.c:2439
 do_syscall_64+0x9f/0x140 arch/x86/entry/common.c:48
 entry_SYSCALL_64_after_hwframe+0x44/0xa9
RIP: 0033:0x443df9
Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 41 15 00 00 90 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 c0 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007ffc5bc4d068 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 0000000000443df9
RDX: 0000000000000000 RSI: 0000000020001440 RDI: 0000000000000003
RBP: 0000000000000000 R08: 0000000000f0b5ff R09: 0000000000f0b5ff
R10: 00007ffc5bc4cae0 R11: 0000000000000246 R12: 00007ffc5bc4d0a0
R13: 00007ffc5bc4d090 R14: 00007ffc5bc4d080 R15: 0000000000000003

Uninit was stored to memory at:
 kmsan_save_stack_with_flags mm/kmsan/kmsan.c:121 [inline]
 kmsan_internal_chain_origin+0xad/0x130 mm/kmsan/kmsan.c:289
 __msan_chain_origin+0x57/0xa0 mm/kmsan/kmsan_instr.c:147
 ip_send_check net/ipv4/ip_output.c:95 [inline]
 __ip_local_out+0x479/0x840 net/ipv4/ip_output.c:104
 ip_local_out+0xa1/0x1e0 net/ipv4/ip_output.c:124
 iptunnel_xmit+0x931/0xf20 net/ipv4/ip_tunnel_core.c:82
 udp_tunnel_xmit_skb+0x526/0x640 net/ipv4/udp_tunnel_core.c:190
 geneve_xmit_skb drivers/net/geneve.c:959 [inline]
 geneve_xmit+0x209e/0x3c20 drivers/net/geneve.c:1059
 __netdev_start_xmit include/linux/netdevice.h:4778 [inline]
 netdev_start_xmit include/linux/netdevice.h:4792 [inline]
 xmit_one+0x2b6/0x760 net/core/dev.c:3574
 dev_hard_start_xmit net/core/dev.c:3590 [inline]
 __dev_queue_xmit+0x3426/0x45c0 net/core/dev.c:4151
 dev_queue_xmit+0x4b/0x60 net/core/dev.c:4184
 packet_snd net/packet/af_packet.c:3006 [inline]
 packet_sendmsg+0x8778/0x9a60 net/packet/af_packet.c:3031
 sock_sendmsg_nosec net/socket.c:652 [inline]
 sock_sendmsg net/socket.c:672 [inline]
 ____sys_sendmsg+0xcfc/0x12f0 net/socket.c:2345
 ___sys_sendmsg net/socket.c:2399 [inline]
 __sys_sendmsg+0x714/0x830 net/socket.c:2432
 __do_sys_sendmsg net/socket.c:2441 [inline]
 __se_sys_sendmsg+0x97/0xb0 net/socket.c:2439
 __x64_sys_sendmsg+0x4a/0x70 net/socket.c:2439
 do_syscall_64+0x9f/0x140 arch/x86/entry/common.c:48
 entry_SYSCALL_64_after_hwframe+0x44/0xa9

Uninit was stored to memory at:
 kmsan_save_stack_with_flags mm/kmsan/kmsan.c:121 [inline]
 kmsan_internal_chain_origin+0xad/0x130 mm/kmsan/kmsan.c:289
 __msan_chain_origin+0x57/0xa0 mm/kmsan/kmsan_instr.c:147
 iptunnel_xmit+0xbd6/0xf20 net/ipv4/ip_tunnel_core.c:76
 udp_tunnel_xmit_skb+0x526/0x640 net/ipv4/udp_tunnel_core.c:190
 geneve_xmit_skb drivers/net/geneve.c:959 [inline]
 geneve_xmit+0x209e/0x3c20 drivers/net/geneve.c:1059
 __netdev_start_xmit include/linux/netdevice.h:4778 [inline]
 netdev_start_xmit include/linux/netdevice.h:4792 [inline]
 xmit_one+0x2b6/0x760 net/core/dev.c:3574
 dev_hard_start_xmit net/core/dev.c:3590 [inline]
 __dev_queue_xmit+0x3426/0x45c0 net/core/dev.c:4151
 dev_queue_xmit+0x4b/0x60 net/core/dev.c:4184
 packet_snd net/packet/af_packet.c:3006 [inline]
 packet_sendmsg+0x8778/0x9a60 net/packet/af_packet.c:3031
 sock_sendmsg_nosec net/socket.c:652 [inline]
 sock_sendmsg net/socket.c:672 [inline]
 ____sys_sendmsg+0xcfc/0x12f0 net/socket.c:2345
 ___sys_sendmsg net/socket.c:2399 [inline]
 __sys_sendmsg+0x714/0x830 net/socket.c:2432
 __do_sys_sendmsg net/socket.c:2441 [inline]
 __se_sys_sendmsg+0x97/0xb0 net/socket.c:2439
 __x64_sys_sendmsg+0x4a/0x70 net/socket.c:2439
 do_syscall_64+0x9f/0x140 arch/x86/entry/common.c:48
 entry_SYSCALL_64_after_hwframe+0x44/0xa9

Uninit was created at:
 kmsan_save_stack_with_flags mm/kmsan/kmsan.c:121 [inline]
 kmsan_internal_poison_shadow+0x5c/0xf0 mm/kmsan/kmsan.c:104
 kmsan_slab_alloc+0x8d/0xe0 mm/kmsan/kmsan_hooks.c:76
 slab_alloc_node mm/slub.c:2907 [inline]
 __kmalloc_node_track_caller+0xa37/0x1430 mm/slub.c:4527
 __kmalloc_reserve net/core/skbuff.c:142 [inline]
 __alloc_skb+0x2f8/0xb30 net/core/skbuff.c:210
 alloc_skb include/linux/skbuff.h:1099 [inline]
 alloc_skb_with_frags+0x1f3/0xc10 net/core/skbuff.c:5894
 sock_alloc_send_pskb+0xdc1/0xf90 net/core/sock.c:2348
 packet_alloc_skb net/packet/af_packet.c:2854 [inline]
 packet_snd net/packet/af_packet.c:2949 [inline]
 packet_sendmsg+0x6aab/0x9a60 net/packet/af_packet.c:3031
 sock_sendmsg_nosec net/socket.c:652 [inline]
 sock_sendmsg net/socket.c:672 [inline]
 ____sys_sendmsg+0xcfc/0x12f0 net/socket.c:2345
 ___sys_sendmsg net/socket.c:2399 [inline]
 __sys_sendmsg+0x714/0x830 net/socket.c:2432
 __do_sys_sendmsg net/socket.c:2441 [inline]
 __se_sys_sendmsg+0x97/0xb0 net/socket.c:2439
 __x64_sys_sendmsg+0x4a/0x70 net/socket.c:2439
 do_syscall_64+0x9f/0x140 arch/x86/entry/common.c:48
 entry_SYSCALL_64_after_hwframe+0x44/0xa9
=====================================================
=====================================================
BUG: KMSAN: uninit-value in ip_rcv_core+0xf4c/0x1480 net/ipv4/ip_input.c:476
CPU: 0 PID: 8433 Comm: syz-executor925 Tainted: G    B             5.11.0-rc7-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:79 [inline]
 dump_stack+0x21c/0x280 lib/dump_stack.c:120
 kmsan_report+0xfb/0x1e0 mm/kmsan/kmsan_report.c:118
 __msan_warning+0x5f/0xa0 mm/kmsan/kmsan_instr.c:197
 ip_rcv_core+0xf4c/0x1480 net/ipv4/ip_input.c:476
 ip_rcv+0xc7/0x820 net/ipv4/ip_input.c:535
 __netif_receive_skb_one_core net/core/dev.c:5323 [inline]
 __netif_receive_skb+0x1ec/0x640 net/core/dev.c:5437
 process_backlog+0x517/0xbd0 net/core/dev.c:6328
 napi_poll+0x428/0x15c0 net/core/dev.c:6806
 net_rx_action+0x34c/0xd30 net/core/dev.c:6889
 __do_softirq+0x1b9/0x715 kernel/softirq.c:343
 asm_call_irq_on_stack+0xf/0x20
 </IRQ>
 __run_on_irqstack arch/x86/include/asm/irq_stack.h:26 [inline]
 run_on_irqstack_cond arch/x86/include/asm/irq_stack.h:77 [inline]
 do_softirq_own_stack+0x6e/0x90 arch/x86/kernel/irq_64.c:77
 do_softirq kernel/softirq.c:246 [inline]
 __local_bh_enable_ip+0x184/0x1d0 kernel/softirq.c:196
 local_bh_enable+0x36/0x40 include/linux/bottom_half.h:32
 rcu_read_unlock_bh include/linux/rcupdate.h:737 [inline]
 __dev_queue_xmit+0x3b3e/0x45c0 net/core/dev.c:4178
 dev_queue_xmit+0x4b/0x60 net/core/dev.c:4184
 packet_snd net/packet/af_packet.c:3006 [inline]
 packet_sendmsg+0x8778/0x9a60 net/packet/af_packet.c:3031
 sock_sendmsg_nosec net/socket.c:652 [inline]
 sock_sendmsg net/socket.c:672 [inline]
 ____sys_sendmsg+0xcfc/0x12f0 net/socket.c:2345
 ___sys_sendmsg net/socket.c:2399 [inline]
 __sys_sendmsg+0x714/0x830 net/socket.c:2432
 __do_sys_sendmsg net/socket.c:2441 [inline]
 __se_sys_sendmsg+0x97/0xb0 net/socket.c:2439
 __x64_sys_sendmsg+0x4a/0x70 net/socket.c:2439
 do_syscall_64+0x9f/0x140 arch/x86/entry/common.c:48
 entry_SYSCALL_64_after_hwframe+0x44/0xa9
RIP: 0033:0x443df9
Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 41 15 00 00 90 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 c0 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007ffc5bc4d068 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 0000000000443df9
RDX: 0000000000000000 RSI: 0000000020001440 RDI: 0000000000000003
RBP: 0000000000000000 R08: 0000000000f0b5ff R09: 0000000000f0b5ff
R10: 00007ffc5bc4cae0 R11: 0000000000000246 R12: 0000000000022fab
R13: 00007ffc5bc4d090 R14: 00007ffc5bc4d080 R15: 00007ffc5bc4d074

Uninit was stored to memory at:
 kmsan_save_stack_with_flags mm/kmsan/kmsan.c:121 [inline]
 kmsan_internal_chain_origin+0xad/0x130 mm/kmsan/kmsan.c:289
 __msan_chain_origin+0x57/0xa0 mm/kmsan/kmsan_instr.c:147
 iptunnel_xmit+0xbd6/0xf20 net/ipv4/ip_tunnel_core.c:76
 udp_tunnel_xmit_skb+0x526/0x640 net/ipv4/udp_tunnel_core.c:190
 geneve_xmit_skb drivers/net/geneve.c:959 [inline]
 geneve_xmit+0x209e/0x3c20 drivers/net/geneve.c:1059
 __netdev_start_xmit include/linux/netdevice.h:4778 [inline]
 netdev_start_xmit include/linux/netdevice.h:4792 [inline]
 xmit_one+0x2b6/0x760 net/core/dev.c:3574
 dev_hard_start_xmit net/core/dev.c:3590 [inline]
 __dev_queue_xmit+0x3426/0x45c0 net/core/dev.c:4151
 dev_queue_xmit+0x4b/0x60 net/core/dev.c:4184
 packet_snd net/packet/af_packet.c:3006 [inline]
 packet_sendmsg+0x8778/0x9a60 net/packet/af_packet.c:3031
 sock_sendmsg_nosec net/socket.c:652 [inline]
 sock_sendmsg net/socket.c:672 [inline]
 ____sys_sendmsg+0xcfc/0x12f0 net/socket.c:2345
 ___sys_sendmsg net/socket.c:2399 [inline]
 __sys_sendmsg+0x714/0x830 net/socket.c:2432
 __do_sys_sendmsg net/socket.c:2441 [inline]
 __se_sys_sendmsg+0x97/0xb0 net/socket.c:2439
 __x64_sys_sendmsg+0x4a/0x70 net/socket.c:2439
 do_syscall_64+0x9f/0x140 arch/x86/entry/common.c:48
 entry_SYSCALL_64_after_hwframe+0x44/0xa9

Uninit was created at:
 kmsan_save_stack_with_flags mm/kmsan/kmsan.c:121 [inline]
 kmsan_internal_poison_shadow+0x5c/0xf0 mm/kmsan/kmsan.c:104
 kmsan_slab_alloc+0x8d/0xe0 mm/kmsan/kmsan_hooks.c:76
 slab_alloc_node mm/slub.c:2907 [inline]
 __kmalloc_node_track_caller+0xa37/0x1430 mm/slub.c:4527
 __kmalloc_reserve net/core/skbuff.c:142 [inline]
 __alloc_skb+0x2f8/0xb30 net/core/skbuff.c:210
 alloc_skb include/linux/skbuff.h:1099 [inline]
 alloc_skb_with_frags+0x1f3/0xc10 net/core/skbuff.c:5894
 sock_alloc_send_pskb+0xdc1/0xf90 net/core/sock.c:2348
 packet_alloc_skb net/packet/af_packet.c:2854 [inline]
 packet_snd net/packet/af_packet.c:2949 [inline]
 packet_sendmsg+0x6aab/0x9a60 net/packet/af_packet.c:3031
 sock_sendmsg_nosec net/socket.c:652 [inline]
 sock_sendmsg net/socket.c:672 [inline]
 ____sys_sendmsg+0xcfc/0x12f0 net/socket.c:2345
 ___sys_sendmsg net/socket.c:2399 [inline]
 __sys_sendmsg+0x714/0x830 net/socket.c:2432
 __do_sys_sendmsg net/socket.c:2441 [inline]
 __se_sys_sendmsg+0x97/0xb0 net/socket.c:2439
 __x64_sys_sendmsg+0x4a/0x70 net/socket.c:2439
 do_syscall_64+0x9f/0x140 arch/x86/entry/common.c:48
 entry_SYSCALL_64_after_hwframe+0x44/0xa9
=====================================================
=====================================================
BUG: KMSAN: uninit-value in ip_rcv_core+0xf5d/0x1480 net/ipv4/ip_input.c:476
CPU: 0 PID: 8433 Comm: syz-executor925 Tainted: G    B             5.11.0-rc7-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:79 [inline]
 dump_stack+0x21c/0x280 lib/dump_stack.c:120
 kmsan_report+0xfb/0x1e0 mm/kmsan/kmsan_report.c:118
 __msan_warning+0x5f/0xa0 mm/kmsan/kmsan_instr.c:197
 ip_rcv_core+0xf5d/0x1480 net/ipv4/ip_input.c:476
 ip_rcv+0xc7/0x820 net/ipv4/ip_input.c:535
 __netif_receive_skb_one_core net/core/dev.c:5323 [inline]
 __netif_receive_skb+0x1ec/0x640 net/core/dev.c:5437
 process_backlog+0x517/0xbd0 net/core/dev.c:6328
 napi_poll+0x428/0x15c0 net/core/dev.c:6806
 net_rx_action+0x34c/0xd30 net/core/dev.c:6889
 __do_softirq+0x1b9/0x715 kernel/softirq.c:343
 asm_call_irq_on_stack+0xf/0x20
 </IRQ>
 __run_on_irqstack arch/x86/include/asm/irq_stack.h:26 [inline]
 run_on_irqstack_cond arch/x86/include/asm/irq_stack.h:77 [inline]
 do_softirq_own_stack+0x6e/0x90 arch/x86/kernel/irq_64.c:77
 do_softirq kernel/softirq.c:246 [inline]
 __local_bh_enable_ip+0x184/0x1d0 kernel/softirq.c:196
 local_bh_enable+0x36/0x40 include/linux/bottom_half.h:32
 rcu_read_unlock_bh include/linux/rcupdate.h:737 [inline]
 __dev_queue_xmit+0x3b3e/0x45c0 net/core/dev.c:4178
 dev_queue_xmit+0x4b/0x60 net/core/dev.c:4184
 packet_snd net/packet/af_packet.c:3006 [inline]
 packet_sendmsg+0x8778/0x9a60 net/packet/af_packet.c:3031
 sock_sendmsg_nosec net/socket.c:652 [inline]
 sock_sendmsg net/socket.c:672 [inline]
 ____sys_sendmsg+0xcfc/0x12f0 net/socket.c:2345
 ___sys_sendmsg net/socket.c:2399 [inline]
 __sys_sendmsg+0x714/0x830 net/socket.c:2432
 __do_sys_sendmsg net/socket.c:2441 [inline]
 __se_sys_sendmsg+0x97/0xb0 net/socket.c:2439
 __x64_sys_sendmsg+0x4a/0x70 net/socket.c:2439
 do_syscall_64+0x9f/0x140 arch/x86/entry/common.c:48
 entry_SYSCALL_64_after_hwframe+0x44/0xa9
RIP: 0033:0x443df9
Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 41 15 00 00 90 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 c0 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007ffc5bc4d068 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 0000000000443df9
RDX: 0000000000000000 RSI: 0000000020001440 RDI: 0000000000000003
RBP: 0000000000000000 R08: 0000000000f0b5ff R09: 0000000000f0b5ff
R10: 00007ffc5bc4cae0 R11: 0000000000000246 R12: 0000000000022fab
R13: 00007ffc5bc4d090 R14: 00007ffc5bc4d080 R15: 00007ffc5bc4d074

Uninit was stored to memory at:
 kmsan_save_stack_with_flags mm/kmsan/kmsan.c:121 [inline]
 kmsan_internal_chain_origin+0xad/0x130 mm/kmsan/kmsan.c:289
 __msan_chain_origin+0x57/0xa0 mm/kmsan/kmsan_instr.c:147
 iptunnel_xmit+0xbd6/0xf20 net/ipv4/ip_tunnel_core.c:76
 udp_tunnel_xmit_skb+0x526/0x640 net/ipv4/udp_tunnel_core.c:190
 geneve_xmit_skb drivers/net/geneve.c:959 [inline]
 geneve_xmit+0x209e/0x3c20 drivers/net/geneve.c:1059
 __netdev_start_xmit include/linux/netdevice.h:4778 [inline]
 netdev_start_xmit include/linux/netdevice.h:4792 [inline]
 xmit_one+0x2b6/0x760 net/core/dev.c:3574
 dev_hard_start_xmit net/core/dev.c:3590 [inline]
 __dev_queue_xmit+0x3426/0x45c0 net/core/dev.c:4151
 dev_queue_xmit+0x4b/0x60 net/core/dev.c:4184
 packet_snd net/packet/af_packet.c:3006 [inline]
 packet_sendmsg+0x8778/0x9a60 net/packet/af_packet.c:3031
 sock_sendmsg_nosec net/socket.c:652 [inline]
 sock_sendmsg net/socket.c:672 [inline]
 ____sys_sendmsg+0xcfc/0x12f0 net/socket.c:2345
 ___sys_sendmsg net/socket.c:2399 [inline]
 __sys_sendmsg+0x714/0x830 net/socket.c:2432
 __do_sys_sendmsg net/socket.c:2441 [inline]
 __se_sys_sendmsg+0x97/0xb0 net/socket.c:2439
 __x64_sys_sendmsg+0x4a/0x70 net/socket.c:2439
 do_syscall_64+0x9f/0x140 arch/x86/entry/common.c:48
 entry_SYSCALL_64_after_hwframe+0x44/0xa9

Uninit was created at:
 kmsan_save_stack_with_flags mm/kmsan/kmsan.c:121 [inline]
 kmsan_internal_poison_shadow+0x5c/0xf0 mm/kmsan/kmsan.c:104
 kmsan_slab_alloc+0x8d/0xe0 mm/kmsan/kmsan_hooks.c:76
 slab_alloc_node mm/slub.c:2907 [inline]
 __kmalloc_node_track_caller+0xa37/0x1430 mm/slub.c:4527
 __kmalloc_reserve net/core/skbuff.c:142 [inline]
 __alloc_skb+0x2f8/0xb30 net/core/skbuff.c:210
 alloc_skb include/linux/skbuff.h:1099 [inline]
 alloc_skb_with_frags+0x1f3/0xc10 net/core/skbuff.c:5894
 sock_alloc_send_pskb+0xdc1/0xf90 net/core/sock.c:2348
 packet_alloc_skb net/packet/af_packet.c:2854 [inline]
 packet_snd net/packet/af_packet.c:2949 [inline]
 packet_sendmsg+0x6aab/0x9a60 net/packet/af_packet.c:3031
 sock_sendmsg_nosec net/socket.c:652 [inline]
 sock_sendmsg net/socket.c:672 [inline]
 ____sys_sendmsg+0xcfc/0x12f0 net/socket.c:2345
 ___sys_sendmsg net/socket.c:2399 [inline]
 __sys_sendmsg+0x714/0x830 net/socket.c:2432
 __do_sys_sendmsg net/socket.c:2441 [inline]
 __se_sys_sendmsg+0x97/0xb0 net/socket.c:2439
 __x64_sys_sendmsg+0x4a/0x70 net/socket.c:2439
 do_syscall_64+0x9f/0x140 arch/x86/entry/common.c:48
 entry_SYSCALL_64_after_hwframe+0x44/0xa9
=====================================================
=====================================================
BUG: KMSAN: uninit-value in ip_rcv_core+0x1068/0x1480 net/ipv4/ip_input.c:485
CPU: 0 PID: 8433 Comm: syz-executor925 Tainted: G    B             5.11.0-rc7-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:79 [inline]
 dump_stack+0x21c/0x280 lib/dump_stack.c:120
 kmsan_report+0xfb/0x1e0 mm/kmsan/kmsan_report.c:118
 __msan_warning+0x5f/0xa0 mm/kmsan/kmsan_instr.c:197
 ip_rcv_core+0x1068/0x1480 net/ipv4/ip_input.c:485
 ip_rcv+0xc7/0x820 net/ipv4/ip_input.c:535
 __netif_receive_skb_one_core net/core/dev.c:5323 [inline]
 __netif_receive_skb+0x1ec/0x640 net/core/dev.c:5437
 process_backlog+0x517/0xbd0 net/core/dev.c:6328
 napi_poll+0x428/0x15c0 net/core/dev.c:6806
 net_rx_action+0x34c/0xd30 net/core/dev.c:6889
 __do_softirq+0x1b9/0x715 kernel/softirq.c:343
 asm_call_irq_on_stack+0xf/0x20
 </IRQ>
 __run_on_irqstack arch/x86/include/asm/irq_stack.h:26 [inline]
 run_on_irqstack_cond arch/x86/include/asm/irq_stack.h:77 [inline]
 do_softirq_own_stack+0x6e/0x90 arch/x86/kernel/irq_64.c:77
 do_softirq kernel/softirq.c:246 [inline]
 __local_bh_enable_ip+0x184/0x1d0 kernel/softirq.c:196
 local_bh_enable+0x36/0x40 include/linux/bottom_half.h:32
 rcu_read_unlock_bh include/linux/rcupdate.h:737 [inline]
 __dev_queue_xmit+0x3b3e/0x45c0 net/core/dev.c:4178
 dev_queue_xmit+0x4b/0x60 net/core/dev.c:4184
 packet_snd net/packet/af_packet.c:3006 [inline]
 packet_sendmsg+0x8778/0x9a60 net/packet/af_packet.c:3031
 sock_sendmsg_nosec net/socket.c:652 [inline]
 sock_sendmsg net/socket.c:672 [inline]
 ____sys_sendmsg+0xcfc/0x12f0 net/socket.c:2345
 ___sys_sendmsg net/socket.c:2399 [inline]
 __sys_sendmsg+0x714/0x830 net/socket.c:2432
 __do_sys_sendmsg net/socket.c:2441 [inline]
 __se_sys_sendmsg+0x97/0xb0 net/socket.c:2439
 __x64_sys_sendmsg+0x4a/0x70 net/socket.c:2439
 do_syscall_64+0x9f/0x140 arch/x86/entry/common.c:48
 entry_SYSCALL_64_after_hwframe+0x44/0xa9
RIP: 0033:0x443df9
Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 41 15 00 00 90 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 c0 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007ffc5bc4d068 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 0000000000443df9
RDX: 0000000000000000 RSI: 0000000020001440 RDI: 0000000000000003
RBP: 0000000000000000 R08: 0000000000f0b5ff R09: 0000000000f0b5ff
R10: 00007ffc5bc4cae0 R11: 0000000000000246 R12: 0000000000022fab
R13: 00007ffc5bc4d090 R14: 00007ffc5bc4d080 R15: 00007ffc5bc4d074

Uninit was stored to memory at:
 kmsan_save_stack_with_flags mm/kmsan/kmsan.c:121 [inline]
 kmsan_internal_chain_origin+0xad/0x130 mm/kmsan/kmsan.c:289
 __msan_chain_origin+0x57/0xa0 mm/kmsan/kmsan_instr.c:147
 ip_send_check net/ipv4/ip_output.c:95 [inline]
 __ip_local_out+0x479/0x840 net/ipv4/ip_output.c:104
 ip_local_out+0xa1/0x1e0 net/ipv4/ip_output.c:124
 iptunnel_xmit+0x931/0xf20 net/ipv4/ip_tunnel_core.c:82
 udp_tunnel_xmit_skb+0x526/0x640 net/ipv4/udp_tunnel_core.c:190
 geneve_xmit_skb drivers/net/geneve.c:959 [inline]
 geneve_xmit+0x209e/0x3c20 drivers/net/geneve.c:1059
 __netdev_start_xmit include/linux/netdevice.h:4778 [inline]
 netdev_start_xmit include/linux/netdevice.h:4792 [inline]
 xmit_one+0x2b6/0x760 net/core/dev.c:3574
 dev_hard_start_xmit net/core/dev.c:3590 [inline]
 __dev_queue_xmit+0x3426/0x45c0 net/core/dev.c:4151
 dev_queue_xmit+0x4b/0x60 net/core/dev.c:4184
 packet_snd net/packet/af_packet.c:3006 [inline]
 packet_sendmsg+0x8778/0x9a60 net/packet/af_packet.c:3031
 sock_sendmsg_nosec net/socket.c:652 [inline]
 sock_sendmsg net/socket.c:672 [inline]
 ____sys_sendmsg+0xcfc/0x12f0 net/socket.c:2345
 ___sys_sendmsg net/socket.c:2399 [inline]
 __sys_sendmsg+0x714/0x830 net/socket.c:2432
 __do_sys_sendmsg net/socket.c:2441 [inline]
 __se_sys_sendmsg+0x97/0xb0 net/socket.c:2439
 __x64_sys_sendmsg+0x4a/0x70 net/socket.c:2439
 do_syscall_64+0x9f/0x140 arch/x86/entry/common.c:48
 entry_SYSCALL_64_after_hwframe+0x44/0xa9

Uninit was stored to memory at:
 kmsan_save_stack_with_flags mm/kmsan/kmsan.c:121 [inline]
 kmsan_internal_chain_origin+0xad/0x130 mm/kmsan/kmsan.c:289
 __msan_chain_origin+0x57/0xa0 mm/kmsan/kmsan_instr.c:147
 iptunnel_xmit+0xbd6/0xf20 net/ipv4/ip_tunnel_core.c:76
 udp_tunnel_xmit_skb+0x526/0x640 net/ipv4/udp_tunnel_core.c:190
 geneve_xmit_skb drivers/net/geneve.c:959 [inline]
 geneve_xmit+0x209e/0x3c20 drivers/net/geneve.c:1059
 __netdev_start_xmit include/linux/netdevice.h:4778 [inline]
 netdev_start_xmit include/linux/netdevice.h:4792 [inline]
 xmit_one+0x2b6/0x760 net/core/dev.c:3574
 dev_hard_start_xmit net/core/dev.c:3590 [inline]
 __dev_queue_xmit+0x3426/0x45c0 net/core/dev.c:4151
 dev_queue_xmit+0x4b/0x60 net/core/dev.c:4184
 packet_snd net/packet/af_packet.c:3006 [inline]
 packet_sendmsg+0x8778/0x9a60 net/packet/af_packet.c:3031
 sock_sendmsg_nosec net/socket.c:652 [inline]
 sock_sendmsg net/socket.c:672 [inline]
 ____sys_sendmsg+0xcfc/0x12f0 net/socket.c:2345
 ___sys_sendmsg net/socket.c:2399 [inline]
 __sys_sendmsg+0x714/0x830 net/socket.c:2432
 __do_sys_sendmsg net/socket.c:2441 [inline]
 __se_sys_sendmsg+0x97/0xb0 net/socket.c:2439
 __x64_sys_sendmsg+0x4a/0x70 net/socket.c:2439
 do_syscall_64+0x9f/0x140 arch/x86/entry/common.c:48
 entry_SYSCALL_64_after_hwframe+0x44/0xa9

Uninit was created at:
 kmsan_save_stack_with_flags mm/kmsan/kmsan.c:121 [inline]
 kmsan_internal_poison_shadow+0x5c/0xf0 mm/kmsan/kmsan.c:104
 kmsan_slab_alloc+0x8d/0xe0 mm/kmsan/kmsan_hooks.c:76
 slab_alloc_node mm/slub.c:2907 [inline]
 __kmalloc_node_track_caller+0xa37/0x1430 mm/slub.c:4527
 __kmalloc_reserve net/core/skbuff.c:142 [inline]
 __alloc_skb+0x2f8/0xb30 net/core/skbuff.c:210
 alloc_skb include/linux/skbuff.h:1099 [inline]
 alloc_skb_with_frags+0x1f3/0xc10 net/core/skbuff.c:5894
 sock_alloc_send_pskb+0xdc1/0xf90 net/core/sock.c:2348
 packet_alloc_skb net/packet/af_packet.c:2854 [inline]
 packet_snd net/packet/af_packet.c:2949 [inline]
 packet_sendmsg+0x6aab/0x9a60 net/packet/af_packet.c:3031
 sock_sendmsg_nosec net/socket.c:652 [inline]
 sock_sendmsg net/socket.c:672 [inline]
 ____sys_sendmsg+0xcfc/0x12f0 net/socket.c:2345
 ___sys_sendmsg net/socket.c:2399 [inline]
 __sys_sendmsg+0x714/0x830 net/socket.c:2432
 __do_sys_sendmsg net/socket.c:2441 [inline]
 __se_sys_sendmsg+0x97/0xb0 net/socket.c:2439
 __x64_sys_sendmsg+0x4a/0x70 net/socket.c:2439
 do_syscall_64+0x9f/0x140 arch/x86/entry/common.c:48
 entry_SYSCALL_64_after_hwframe+0x44/0xa9
=====================================================
=====================================================
BUG: KMSAN: uninit-value in ip_rcv_core+0xf4c/0x1480 net/ipv4/ip_input.c:476
CPU: 0 PID: 8435 Comm: syz-executor925 Tainted: G    B             5.11.0-rc7-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:79 [inline]
 dump_stack+0x21c/0x280 lib/dump_stack.c:120
 kmsan_report+0xfb/0x1e0 mm/kmsan/kmsan_report.c:118
 __msan_warning+0x5f/0xa0 mm/kmsan/kmsan_instr.c:197
 ip_rcv_core+0xf4c/0x1480 net/ipv4/ip_input.c:476
 ip_rcv+0xc7/0x820 net/ipv4/ip_input.c:535
 __netif_receive_skb_one_core net/core/dev.c:5323 [inline]
 __netif_receive_skb+0x1ec/0x640 net/core/dev.c:5437
 process_backlog+0x517/0xbd0 net/core/dev.c:6328
 napi_poll+0x428/0x15c0 net/core/dev.c:6806
 net_rx_action+0x34c/0xd30 net/core/dev.c:6889
 __do_softirq+0x1b9/0x715 kernel/softirq.c:343
 asm_call_irq_on_stack+0xf/0x20
 </IRQ>
 __run_on_irqstack arch/x86/include/asm/irq_stack.h:26 [inline]
 run_on_irqstack_cond arch/x86/include/asm/irq_stack.h:77 [inline]
 do_softirq_own_stack+0x6e/0x90 arch/x86/kernel/irq_64.c:77
 do_softirq kernel/softirq.c:246 [inline]
 __local_bh_enable_ip+0x184/0x1d0 kernel/softirq.c:196
 local_bh_enable+0x36/0x40 include/linux/bottom_half.h:32
 rcu_read_unlock_bh include/linux/rcupdate.h:737 [inline]
 __dev_queue_xmit+0x3b3e/0x45c0 net/core/dev.c:4178
 dev_queue_xmit+0x4b/0x60 net/core/dev.c:4184
 packet_snd net/packet/af_packet.c:3006 [inline]
 packet_sendmsg+0x8778/0x9a60 net/packet/af_packet.c:3031
 sock_sendmsg_nosec net/socket.c:652 [inline]
 sock_sendmsg net/socket.c:672 [inline]
 ____sys_sendmsg+0xcfc/0x12f0 net/socket.c:2345
 ___sys_sendmsg net/socket.c:2399 [inline]
 __sys_sendmsg+0x714/0x830 net/socket.c:2432
 __do_sys_sendmsg net/socket.c:2441 [inline]
 __se_sys_sendmsg+0x97/0xb0 net/socket.c:2439
 __x64_sys_sendmsg+0x4a/0x70 net/socket.c:2439
 do_syscall_64+0x9f/0x140 arch/x86/entry/common.c:48
 entry_SYSCALL_64_after_hwframe+0x44/0xa9
RIP: 0033:0x443df9
Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 41 15 00 00 90 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 c0 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007ffc5bc4d068 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 0000000000443df9
RDX: 0000000000000000 RSI: 0000000020001440 RDI: 0000000000000003
RBP: 0000000000000000 R08: 0000000000f0b5ff R09: 0000000000f0b5ff
R10: 00007ffc5bc4cae0 R11: 0000000000000246 R12: 0000000000023c03
R13: 00007ffc5bc4d090 R14: 00007ffc5bc4d080 R15: 00007ffc5bc4d074

Uninit was stored to memory at:
 kmsan_save_stack_with_flags mm/kmsan/kmsan.c:121 [inline]
 kmsan_internal_chain_origin+0xad/0x130 mm/kmsan/kmsan.c:289
 __msan_chain_origin+0x57/0xa0 mm/kmsan/kmsan_instr.c:147
 iptunnel_xmit+0xbd6/0xf20 net/ipv4/ip_tunnel_core.c:76
 udp_tunnel_xmit_skb+0x526/0x640 net/ipv4/udp_tunnel_core.c:190
 geneve_xmit_skb drivers/net/geneve.c:959 [inline]
 geneve_xmit+0x209e/0x3c20 drivers/net/geneve.c:1059
 __netdev_start_xmit include/linux/netdevice.h:4778 [inline]
 netdev_start_xmit include/linux/netdevice.h:4792 [inline]
 xmit_one+0x2b6/0x760 net/core/dev.c:3574
 dev_hard_start_xmit net/core/dev.c:3590 [inline]
 __dev_queue_xmit+0x3426/0x45c0 net/core/dev.c:4151
 dev_queue_xmit+0x4b/0x60 net/core/dev.c:4184
 packet_snd net/packet/af_packet.c:3006 [inline]
 packet_sendmsg+0x8778/0x9a60 net/packet/af_packet.c:3031
 sock_sendmsg_nosec net/socket.c:652 [inline]
 sock_sendmsg net/socket.c:672 [inline]
 ____sys_sendmsg+0xcfc/0x12f0 net/socket.c:2345
 ___sys_sendmsg net/socket.c:2399 [inline]
 __sys_sendmsg+0x714/0x830 net/socket.c:2432
 __do_sys_sendmsg net/socket.c:2441 [inline]
 __se_sys_sendmsg+0x97/0xb0 net/socket.c:2439
 __x64_sys_sendmsg+0x4a/0x70 net/socket.c:2439
 do_syscall_64+0x9f/0x140 arch/x86/entry/common.c:48
 entry_SYSCALL_64_after_hwframe+0x44/0xa9

Uninit was created at:
 kmsan_save_stack_with_flags mm/kmsan/kmsan.c:121 [inline]
 kmsan_internal_poison_shadow+0x5c/0xf0 mm/kmsan/kmsan.c:104
 kmsan_slab_alloc+0x8d/0xe0 mm/kmsan/kmsan_hooks.c:76
 slab_alloc_node mm/slub.c:2907 [inline]
 __kmalloc_node_track_caller+0xa37/0x1430 mm/slub.c:4527
 __kmalloc_reserve net/core/skbuff.c:142 [inline]
 __alloc_skb+0x2f8/0xb30 net/core/skbuff.c:210
 alloc_skb include/linux/skbuff.h:1099 [inline]
 alloc_skb_with_frags+0x1f3/0xc10 net/core/skbuff.c:5894
 sock_alloc_send_pskb+0xdc1/0xf90 net/core/sock.c:2348
 packet_alloc_skb net/packet/af_packet.c:2854 [inline]
 packet_snd net/packet/af_packet.c:2949 [inline]
 packet_sendmsg+0x6aab/0x9a60 net/packet/af_packet.c:3031
 sock_sendmsg_nosec net/socket.c:652 [inline]
 sock_sendmsg net/socket.c:672 [inline]
 ____sys_sendmsg+0xcfc/0x12f0 net/socket.c:2345
 ___sys_sendmsg net/socket.c:2399 [inline]
 __sys_sendmsg+0x714/0x830 net/socket.c:2432
 __do_sys_sendmsg net/socket.c:2441 [inline]
 __se_sys_sendmsg+0x97/0xb0 net/socket.c:2439
 __x64_sys_sendmsg+0x4a/0x70 net/socket.c:2439
 do_syscall_64+0x9f/0x140 arch/x86/entry/common.c:48
 entry_SYSCALL_64_after_hwframe+0x44/0xa9
=====================================================
=====================================================
BUG: KMSAN: uninit-value in ip_rcv_core+0xf5d/0x1480 net/ipv4/ip_input.c:476
CPU: 0 PID: 8435 Comm: syz-executor925 Tainted: G    B             5.11.0-rc7-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:79 [inline]
 dump_stack+0x21c/0x280 lib/dump_stack.c:120
 kmsan_report+0xfb/0x1e0 mm/kmsan/kmsan_report.c:118
 __msan_warning+0x5f/0xa0 mm/kmsan/kmsan_instr.c:197
 ip_rcv_core+0xf5d/0x1480 net/ipv4/ip_input.c:476
 ip_rcv+0xc7/0x820 net/ipv4/ip_input.c:535
 __netif_receive_skb_one_core net/core/dev.c:5323 [inline]
 __netif_receive_skb+0x1ec/0x640 net/core/dev.c:5437
 process_backlog+0x517/0xbd0 net/core/dev.c:6328
 napi_poll+0x428/0x15c0 net/core/dev.c:6806
 net_rx_action+0x34c/0xd30 net/core/dev.c:6889
 __do_softirq+0x1b9/0x715 kernel/softirq.c:343
 asm_call_irq_on_stack+0xf/0x20
 </IRQ>
 __run_on_irqstack arch/x86/include/asm/irq_stack.h:26 [inline]
 run_on_irqstack_cond arch/x86/include/asm/irq_stack.h:77 [inline]
 do_softirq_own_stack+0x6e/0x90 arch/x86/kernel/irq_64.c:77
 do_softirq kernel/softirq.c:246 [inline]
 __local_bh_enable_ip+0x184/0x1d0 kernel/softirq.c:196
 local_bh_enable+0x36/0x40 include/linux/bottom_half.h:32
 rcu_read_unlock_bh include/linux/rcupdate.h:737 [inline]
 __dev_queue_xmit+0x3b3e/0x45c0 net/core/dev.c:4178
 dev_queue_xmit+0x4b/0x60 net/core/dev.c:4184
 packet_snd net/packet/af_packet.c:3006 [inline]
 packet_sendmsg+0x8778/0x9a60 net/packet/af_packet.c:3031
 sock_sendmsg_nosec net/socket.c:652 [inline]
 sock_sendmsg net/socket.c:672 [inline]
 ____sys_sendmsg+0xcfc/0x12f0 net/socket.c:2345
 ___sys_sendmsg net/socket.c:2399 [inline]
 __sys_sendmsg+0x714/0x830 net/socket.c:2432
 __do_sys_sendmsg net/socket.c:2441 [inline]
 __se_sys_sendmsg+0x97/0xb0 net/socket.c:2439
 __x64_sys_sendmsg+0x4a/0x70 net/socket.c:2439
 do_syscall_64+0x9f/0x140 arch/x86/entry/common.c:48
 entry_SYSCALL_64_after_hwframe+0x44/0xa9
RIP: 0033:0x443df9
Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 41 15 00 00 90 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 c0 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007ffc5bc4d068 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 0000000000443df9
RDX: 0000000000000000 RSI: 0000000020001440 RDI: 0000000000000003
RBP: 0000000000000000 R08: 0000000000f0b5ff R09: 0000000000f0b5ff
R10: 00007ffc5bc4cae0 R11: 0000000000000246 R12: 0000000000023c03
R13: 00007ffc5bc4d090 R14: 00007ffc5bc4d080 R15: 00007ffc5bc4d074

Uninit was stored to memory at:
 kmsan_save_stack_with_flags mm/kmsan/kmsan.c:121 [inline]
 kmsan_internal_chain_origin+0xad/0x130 mm/kmsan/kmsan.c:289
 __msan_chain_origin+0x57/0xa0 mm/kmsan/kmsan_instr.c:147
 iptunnel_xmit+0xbd6/0xf20 net/ipv4/ip_tunnel_core.c:76
 udp_tunnel_xmit_skb+0x526/0x640 net/ipv4/udp_tunnel_core.c:190
 geneve_xmit_skb drivers/net/geneve.c:959 [inline]
 geneve_xmit+0x209e/0x3c20 drivers/net/geneve.c:1059
 __netdev_start_xmit include/linux/netdevice.h:4778 [inline]
 netdev_start_xmit include/linux/netdevice.h:4792 [inline]
 xmit_one+0x2b6/0x760 net/core/dev.c:3574
 dev_hard_start_xmit net/core/dev.c:3590 [inline]
 __dev_queue_xmit+0x3426/0x45c0 net/core/dev.c:4151
 dev_queue_xmit+0x4b/0x60 net/core/dev.c:4184
 packet_snd net/packet/af_packet.c:3006 [inline]
 packet_sendmsg+0x8778/0x9a60 net/packet/af_packet.c:3031
 sock_sendmsg_nosec net/socket.c:652 [inline]
 sock_sendmsg net/socket.c:672 [inline]
 ____sys_sendmsg+0xcfc/0x12f0 net/socket.c:2345
 ___sys_sendmsg net/socket.c:2399 [inline]
 __sys_sendmsg+0x714/0x830 net/socket.c:2432
 __do_sys_sendmsg net/socket.c:2441 [inline]
 __se_sys_sendmsg+0x97/0xb0 net/socket.c:2439
 __x64_sys_sendmsg+0x4a/0x70 net/socket.c:2439
 do_syscall_64+0x9f/0x140 arch/x86/entry/common.c:48
 entry_SYSCALL_64_after_hwframe+0x44/0xa9

Uninit was created at:
 kmsan_save_stack_with_flags mm/kmsan/kmsan.c:121 [inline]
 kmsan_internal_poison_shadow+0x5c/0xf0 mm/kmsan/kmsan.c:104
 kmsan_slab_alloc+0x8d/0xe0 mm/kmsan/kmsan_hooks.c:76
 slab_alloc_node mm/slub.c:2907 [inline]
 __kmalloc_node_track_caller+0xa37/0x1430 mm/slub.c:4527
 __kmalloc_reserve net/core/skbuff.c:142 [inline]
 __alloc_skb+0x2f8/0xb30 net/core/skbuff.c:210
 alloc_skb include/linux/skbuff.h:1099 [inline]
 alloc_skb_with_frags+0x1f3/0xc10 net/core/skbuff.c:5894
 sock_alloc_send_pskb+0xdc1/0xf90 net/core/sock.c:2348
 packet_alloc_skb net/packet/af_packet.c:2854 [inline]
 packet_snd net/packet/af_packet.c:2949 [inline]
 packet_sendmsg+0x6aab/0x9a60 net/packet/af_packet.c:3031
 sock_sendmsg_nosec net/socket.c:652 [inline]
 sock_sendmsg net/socket.c:672 [inline]
 ____sys_sendmsg+0xcfc/0x12f0 net/socket.c:2345
 ___sys_sendmsg net/socket.c:2399 [inline]
 __sys_sendmsg+0x714/0x830 net/socket.c:2432
 __do_sys_sendmsg net/socket.c:2441 [inline]
 __se_sys_sendmsg+0x97/0xb0 net/socket.c:2439
 __x64_sys_sendmsg+0x4a/0x70 net/socket.c:2439
 do_syscall_64+0x9f/0x140 arch/x86/entry/common.c:48
 entry_SYSCALL_64_after_hwframe+0x44/0xa9
=====================================================
=====================================================
BUG: KMSAN: uninit-value in ip_rcv_core+0x1068/0x1480 net/ipv4/ip_input.c:485
CPU: 0 PID: 8435 Comm: syz-executor925 Tainted: G    B             5.11.0-rc7-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:79 [inline]
 dump_stack+0x21c/0x280 lib/dump_stack.c:120
 kmsan_report+0xfb/0x1e0 mm/kmsan/kmsan_report.c:118
 __msan_warning+0x5f/0xa0 mm/kmsan/kmsan_instr.c:197
 ip_rcv_core+0x1068/0x1480 net/ipv4/ip_input.c:485
 ip_rcv+0xc7/0x820 net/ipv4/ip_input.c:535
 __netif_receive_skb_one_core net/core/dev.c:5323 [inline]
 __netif_receive_skb+0x1ec/0x640 net/core/dev.c:5437
 process_backlog+0x517/0xbd0 net/core/dev.c:6328
 napi_poll+0x428/0x15c0 net/core/dev.c:6806
 net_rx_action+0x34c/0xd30 net/core/dev.c:6889
 __do_softirq+0x1b9/0x715 kernel/softirq.c:343
 asm_call_irq_on_stack+0xf/0x20
 </IRQ>
 __run_on_irqstack arch/x86/include/asm/irq_stack.h:26 [inline]
 run_on_irqstack_cond arch/x86/include/asm/irq_stack.h:77 [inline]
 do_softirq_own_stack+0x6e/0x90 arch/x86/kernel/irq_64.c:77
 do_softirq kernel/softirq.c:246 [inline]
 __local_bh_enable_ip+0x184/0x1d0 kernel/softirq.c:196
 local_bh_enable+0x36/0x40 include/linux/bottom_half.h:32
 rcu_read_unlock_bh include/linux/rcupdate.h:737 [inline]
 __dev_queue_xmit+0x3b3e/0x45c0 net/core/dev.c:4178
 dev_queue_xmit+0x4b/0x60 net/core/dev.c:4184
 packet_snd net/packet/af_packet.c:3006 [inline]
 packet_sendmsg+0x8778/0x9a60 net/packet/af_packet.c:3031
 sock_sendmsg_nosec net/socket.c:652 [inline]
 sock_sendmsg net/socket.c:672 [inline]
 ____sys_sendmsg+0xcfc/0x12f0 net/socket.c:2345
 ___sys_sendmsg net/socket.c:2399 [inline]
 __sys_sendmsg+0x714/0x830 net/socket.c:2432
 __do_sys_sendmsg net/socket.c:2441 [inline]
 __se_sys_sendmsg+0x97/0xb0 net/socket.c:2439
 __x64_sys_sendmsg+0x4a/0x70 net/socket.c:2439
 do_syscall_64+0x9f/0x140 arch/x86/entry/common.c:48
 entry_SYSCALL_64_after_hwframe+0x44/0xa9
RIP: 0033:0x443df9
Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 41 15 00 00 90 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 c0 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007ffc5bc4d068 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 0000000000443df9
RDX: 0000000000000000 RSI: 0000000020001440 RDI: 0000000000000003
RBP: 0000000000000000 R08: 0000000000f0b5ff R09: 0000000000f0b5ff
R10: 00007ffc5bc4cae0 R11: 0000000000000246 R12: 0000000000023c03
R13: 00007ffc5bc4d090 R14: 00007ffc5bc4d080 R15: 00007ffc5bc4d074

Uninit was stored to memory at:
 kmsan_save_stack_with_flags mm/kmsan/kmsan.c:121 [inline]
 kmsan_internal_chain_origin+0xad/0x130 mm/kmsan/kmsan.c:289
 __msan_chain_origin+0x57/0xa0 mm/kmsan/kmsan_instr.c:147
 ip_send_check net/ipv4/ip_output.c:95 [inline]
 __ip_local_out+0x479/0x840 net/ipv4/ip_output.c:104
 ip_local_out+0xa1/0x1e0 net/ipv4/ip_output.c:124
 iptunnel_xmit+0x931/0xf20 net/ipv4/ip_tunnel_core.c:82
 udp_tunnel_xmit_skb+0x526/0x640 net/ipv4/udp_tunnel_core.c:190
 geneve_xmit_skb drivers/net/geneve.c:959 [inline]
 geneve_xmit+0x209e/0x3c20 drivers/net/geneve.c:1059
 __netdev_start_xmit include/linux/netdevice.h:4778 [inline]
 netdev_start_xmit include/linux/netdevice.h:4792 [inline]
 xmit_one+0x2b6/0x760 net/core/dev.c:3574
 dev_hard_start_xmit net/core/dev.c:3590 [inline]
 __dev_queue_xmit+0x3426/0x45c0 net/core/dev.c:4151
 dev_queue_xmit+0x4b/0x60 net/core/dev.c:4184
 packet_snd net/packet/af_packet.c:3006 [inline]
 packet_sendmsg+0x8778/0x9a60 net/packet/af_packet.c:3031
 sock_sendmsg_nosec net/socket.c:652 [inline]
 sock_sendmsg net/socket.c:672 [inline]
 ____sys_sendmsg+0xcfc/0x12f0 net/socket.c:2345
 ___sys_sendmsg net/socket.c:2399 [inline]
 __sys_sendmsg+0x714/0x830 net/socket.c:2432
 __do_sys_sendmsg net/socket.c:2441 [inline]
 __se_sys_sendmsg+0x97/0xb0 net/socket.c:2439
 __x64_sys_sendmsg+0x4a/0x70 net/socket.c:2439
 do_syscall_64+0x9f/0x140 arch/x86/entry/common.c:48
 entry_SYSCALL_64_after_hwframe+0x44/0xa9

Uninit was stored to memory at:
 kmsan_save_stack_with_flags mm/kmsan/kmsan.c:121 [inline]
 kmsan_internal_chain_origin+0xad/0x130 mm/kmsan/kmsan.c:289
 __msan_chain_origin+0x57/0xa0 mm/kmsan/kmsan_instr.c:147
 iptunnel_xmit+0xbd6/0xf20 net/ipv4/ip_tunnel_core.c:76
 udp_tunnel_xmit_skb+0x526/0x640 net/ipv4/udp_tunnel_core.c:190
 geneve_xmit_skb drivers/net/geneve.c:959 [inline]
 geneve_xmit+0x209e/0x3c20 drivers/net/geneve.c:1059
 __netdev_start_xmit include/linux/netdevice.h:4778 [inline]
 netdev_start_xmit include/linux/netdevice.h:4792 [inline]
 xmit_one+0x2b6/0x760 net/core/dev.c:3574
 dev_hard_start_xmit net/core/dev.c:3590 [inline]
 __dev_queue_xmit+0x3426/0x45c0 net/core/dev.c:4151
 dev_queue_xmit+0x4b/0x60 net/core/dev.c:4184
 packet_snd net/packet/af_packet.c:3006 [inline]
 packet_sendmsg+0x8778/0x9a60 net/packet/af_packet.c:3031
 sock_sendmsg_nosec net/socket.c:652 [inline]
 sock_sendmsg net/socket.c:672 [inline]
 ____sys_sendmsg+0xcfc/0x12f0 net/socket.c:2345
 ___sys_sendmsg net/socket.c:2399 [inline]
 __sys_sendmsg+0x714/0x830 net/socket.c:2432
 __do_sys_sendmsg net/socket.c:2441 [inline]
 __se_sys_sendmsg+0x97/0xb0 net/socket.c:2439
 __x64_sys_sendmsg+0x4a/0x70 net/socket.c:2439
 do_syscall_64+0x9f/0x140 arch/x86/entry/common.c:48
 entry_SYSCALL_64_after_hwframe+0x44/0xa9

Uninit was created at:
 kmsan_save_stack_with_flags mm/kmsan/kmsan.c:121 [inline]
 kmsan_internal_poison_shadow+0x5c/0xf0 mm/kmsan/kmsan.c:104
 kmsan_slab_alloc+0x8d/0xe0 mm/kmsan/kmsan_hooks.c:76
 slab_alloc_node mm/slub.c:2907 [inline]
 __kmalloc_node_track_caller+0xa37/0x1430 mm/slub.c:4527
 __kmalloc_reserve net/core/skbuff.c:142 [inline]
 __alloc_skb+0x2f8/0xb30 net/core/skbuff.c:210
 alloc_skb include/linux/skbuff.h:1099 [inline]
 alloc_skb_with_frags+0x1f3/0xc10 net/core/skbuff.c:5894
 sock_alloc_send_pskb+0xdc1/0xf90 net/core/sock.c:2348
 packet_alloc_skb net/packet/af_packet.c:2854 [inline]
 packet_snd net/packet/af_packet.c:2949 [inline]
 packet_sendmsg+0x6aab/0x9a60 net/packet/af_packet.c:3031
 sock_sendmsg_nosec net/socket.c:652 [inline]
 sock_sendmsg net/socket.c:672 [inline]
 ____sys_sendmsg+0xcfc/0x12f0 net/socket.c:2345
 ___sys_sendmsg net/socket.c:2399 [inline]
 __sys_sendmsg+0x714/0x830 net/socket.c:2432
 __do_sys_sendmsg net/socket.c:2441 [inline]
 __se_sys_sendmsg+0x97/0xb0 net/socket.c:2439
 __x64_sys_sendmsg+0x4a/0x70 net/socket.c:2439
 do_syscall_64+0x9f/0x140 arch/x86/entry/common.c:48
 entry_SYSCALL_64_after_hwframe+0x44/0xa9
=====================================================