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BUG: KMSAN: uninit-value in ip_tunnel_xmit+0x476/0x3610 net/ipv4/ip_tunnel.c:658
 ip_tunnel_xmit+0x476/0x3610 net/ipv4/ip_tunnel.c:658
 __gre_xmit net/ipv4/ip_gre.c:469 [inline]
 ipgre_xmit+0xd62/0xe70 net/ipv4/ip_gre.c:661
 __netdev_start_xmit include/linux/netdevice.h:4805 [inline]
 netdev_start_xmit include/linux/netdevice.h:4819 [inline]
 xmit_one+0x14e/0x5f0 net/core/dev.c:3590
 dev_hard_start_xmit+0xe5/0x370 net/core/dev.c:3606
 __dev_queue_xmit+0x1dec/0x31f0 net/core/dev.c:4255
 dev_queue_xmit include/linux/netdevice.h:2994 [inline]
 garp_queue_xmit net/802/garp.c:272 [inline]
 garp_join_timer+0x18a/0x2e0 net/802/garp.c:423
 call_timer_fn+0x43/0x480 kernel/time/timer.c:1474
 expire_timers+0x272/0x610 kernel/time/timer.c:1519
 __run_timers+0x5bc/0x8c0 kernel/time/timer.c:1790
 run_timer_softirq+0x64/0xe0 kernel/time/timer.c:1803
 __do_softirq+0x1cc/0x7fb kernel/softirq.c:571
 invoke_softirq+0x8f/0x100 kernel/softirq.c:445
 __irq_exit_rcu kernel/softirq.c:650 [inline]
 irq_exit_rcu+0x5a/0x110 kernel/softirq.c:662
 sysvec_apic_timer_interrupt+0x9a/0xc0 arch/x86/kernel/apic/apic.c:1106
 asm_sysvec_apic_timer_interrupt+0x20/0x30
 stack_trace_consume_entry+0x148/0x1e0 kernel/stacktrace.c:93
 arch_stack_walk+0x195/0x280 arch/x86/kernel/stacktrace.c:27
 stack_trace_save+0xb2/0x100 kernel/stacktrace.c:122
 ref_tracker_free+0xfd/0xc40 lib/ref_tracker.c:121
 netns_tracker_free include/net/net_namespace.h:327 [inline]
 put_net_track include/net/net_namespace.h:341 [inline]
 __sk_destruct+0x573/0xb00 net/core/sock.c:2096
 sk_destruct net/core/sock.c:2112 [inline]
 __sk_free+0x6f2/0x770 net/core/sock.c:2123
 sk_free+0x6c/0xb0 net/core/sock.c:2134
 sock_put include/net/sock.h:1927 [inline]
 packet_release+0x1644/0x18d0 net/packet/af_packet.c:3177
 __sock_release net/socket.c:650 [inline]
 sock_close+0xdb/0x2d0 net/socket.c:1365
 __fput+0x660/0xe30 fs/file_table.c:317
 ____fput+0x1a/0x20 fs/file_table.c:350
 task_work_run+0x13c/0x280 kernel/task_work.c:177
 resume_user_mode_work include/linux/resume_user_mode.h:49 [inline]
 exit_to_user_mode_loop+0x2a9/0x320 kernel/entry/common.c:171
 exit_to_user_mode_prepare+0x16e/0x220 kernel/entry/common.c:203
 __syscall_exit_to_user_mode_work kernel/entry/common.c:285 [inline]
 syscall_exit_to_user_mode+0x23/0x40 kernel/entry/common.c:296
 do_syscall_64+0x49/0xb0 arch/x86/entry/common.c:86
 entry_SYSCALL_64_after_hwframe+0x46/0xb0

Uninit was created at:
 slab_post_alloc_hook mm/slab.h:755 [inline]
 slab_alloc_node mm/slub.c:3258 [inline]
 __kmalloc_node_track_caller+0x86c/0x1230 mm/slub.c:4995
 kmalloc_reserve net/core/skbuff.c:354 [inline]
 __alloc_skb+0x34a/0xd70 net/core/skbuff.c:426
 alloc_skb include/linux/skbuff.h:1426 [inline]
 garp_pdu_init net/802/garp.c:225 [inline]
 garp_pdu_append_attr+0x299/0x11c0 net/802/garp.c:296
 garp_attr_event+0x146/0x280 net/802/garp.c:338
 garp_gid_event net/802/garp.c:402 [inline]
 garp_join_timer+0xc1/0x2e0 net/802/garp.c:419
 call_timer_fn+0x43/0x480 kernel/time/timer.c:1474
 expire_timers+0x272/0x610 kernel/time/timer.c:1519
 __run_timers+0x5bc/0x8c0 kernel/time/timer.c:1790
 run_timer_softirq+0x64/0xe0 kernel/time/timer.c:1803
 __do_softirq+0x1cc/0x7fb kernel/softirq.c:571

CPU: 1 PID: 5629 Comm: syz-executor.3 Not tainted 5.19.0-rc4-syzkaller-31333-g97117d69c353 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/29/2022
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