===================================================== 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:656 __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:3588 dev_hard_start_xmit+0xe5/0x370 net/core/dev.c:3604 __dev_queue_xmit+0x1dec/0x31f0 net/core/dev.c:4253 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 native_irq_enable arch/x86/include/asm/irqflags.h:45 [inline] arch_local_irq_enable arch/x86/include/asm/irqflags.h:80 [inline] raw_spin_rq_unlock_irq kernel/sched/sched.h:1316 [inline] finish_lock_switch kernel/sched/core.c:4906 [inline] finish_task_switch+0x1f8/0xa20 kernel/sched/core.c:5024 context_switch kernel/sched/core.c:5149 [inline] __schedule+0x1609/0x21d0 kernel/sched/core.c:6458 schedule+0x182/0x250 kernel/sched/core.c:6530 exit_to_user_mode_loop+0x68/0x320 kernel/entry/common.c:159 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:3229 [inline] __kmalloc_node_track_caller+0x86c/0x1230 mm/slub.c:4966 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: 2853 Comm: udevd Not tainted 5.19.0-rc3-syzkaller-30868-g4b28366af7d9 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 =====================================================