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BUG: KMSAN: uninit-value in eth_type_trans+0x356/0xa90 net/ethernet/eth.c:167
CPU: 1 PID: 16 Comm: ksoftirqd/1 Not tainted 5.5.0-rc5-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
 __dump_stack lib/dump_stack.c:77 [inline]
 dump_stack+0x1c9/0x220 lib/dump_stack.c:118
 kmsan_report+0xf8/0x1e0 mm/kmsan/kmsan_report.c:118
 __msan_warning+0x58/0xa0 mm/kmsan/kmsan_instr.c:215
 eth_type_trans+0x356/0xa90 net/ethernet/eth.c:167
 __dev_forward_skb+0x3bc/0x980 net/core/dev.c:2074
 veth_forward_skb drivers/net/veth.c:231 [inline]
 veth_xmit+0x3db/0xb20 drivers/net/veth.c:262
 __netdev_start_xmit include/linux/netdevice.h:4447 [inline]
 netdev_start_xmit include/linux/netdevice.h:4461 [inline]
 xmit_one net/core/dev.c:3420 [inline]
 dev_hard_start_xmit+0x51a/0xab0 net/core/dev.c:3436
 __dev_queue_xmit+0x3837/0x4280 net/core/dev.c:4013
 dev_queue_xmit+0x4b/0x60 net/core/dev.c:4046
 hsr_xmit net/hsr/hsr_forward.c:228 [inline]
 hsr_forward_do net/hsr/hsr_forward.c:285 [inline]
 hsr_forward_skb+0x2259/0x3140 net/hsr/hsr_forward.c:361
 hsr_handle_frame+0x385/0x4b0 net/hsr/hsr_slave.c:43
 __netif_receive_skb_core+0x22ee/0x5870 net/core/dev.c:5051
 __netif_receive_skb_one_core net/core/dev.c:5148 [inline]
 __netif_receive_skb net/core/dev.c:5264 [inline]
 process_backlog+0x610/0x13c0 net/core/dev.c:6095
 napi_poll net/core/dev.c:6532 [inline]
 net_rx_action+0x7a6/0x1aa0 net/core/dev.c:6600
 __do_softirq+0x4a1/0x83a kernel/softirq.c:293
 run_ksoftirqd+0x25/0x40 kernel/softirq.c:607
 smpboot_thread_fn+0x4a3/0x990 kernel/smpboot.c:165
 kthread+0x4b5/0x4f0 kernel/kthread.c:256
 ret_from_fork+0x35/0x40 arch/x86/entry/entry_64.S:353

Uninit was stored to memory at:
 kmsan_save_stack_with_flags mm/kmsan/kmsan.c:144 [inline]
 kmsan_internal_chain_origin+0xc5/0x140 mm/kmsan/kmsan.c:310
 kmsan_memcpy_memmove_metadata+0x25c/0x2e0 mm/kmsan/kmsan.c:247
 kmsan_memcpy_metadata+0xb/0x10 mm/kmsan/kmsan.c:267
 __msan_memcpy+0x44/0x50 mm/kmsan/kmsan_instr.c:116
 pskb_expand_head+0x383/0x1b00 net/core/skbuff.c:1637
 __skb_pad+0x53b/0x930 net/core/skbuff.c:1805
 __skb_put_padto include/linux/skbuff.h:3193 [inline]
 skb_put_padto include/linux/skbuff.h:3212 [inline]
 send_hsr_supervision_frame+0x12d2/0x15a0 net/hsr/hsr_device.c:310
 hsr_announce+0x152/0x370 net/hsr/hsr_device.c:335
 call_timer_fn+0x232/0x530 kernel/time/timer.c:1404
 expire_timers kernel/time/timer.c:1449 [inline]
 __run_timers+0xd60/0x1270 kernel/time/timer.c:1773
 run_timer_softirq+0x2d/0x50 kernel/time/timer.c:1786
 __do_softirq+0x4a1/0x83a kernel/softirq.c:293

Uninit was created at:
 kmsan_save_stack_with_flags+0x3c/0x90 mm/kmsan/kmsan.c:144
 kmsan_internal_alloc_meta_for_pages mm/kmsan/kmsan_shadow.c:307 [inline]
 kmsan_alloc_page+0x134/0x310 mm/kmsan/kmsan_shadow.c:336
 __alloc_pages_nodemask+0x1421/0x5fd0 mm/page_alloc.c:4800
 __alloc_pages include/linux/gfp.h:498 [inline]
 __alloc_pages_node include/linux/gfp.h:511 [inline]
 alloc_pages_node include/linux/gfp.h:525 [inline]
 __page_frag_cache_refill mm/page_alloc.c:4875 [inline]
 page_frag_alloc+0x3ae/0x910 mm/page_alloc.c:4905
 __napi_alloc_skb+0x190/0x620 net/core/skbuff.c:519
 napi_alloc_skb include/linux/skbuff.h:2825 [inline]
 page_to_skb+0x1a2/0x1100 drivers/net/virtio_net.c:384
 receive_mergeable drivers/net/virtio_net.c:924 [inline]
 receive_buf+0xe29/0x8b60 drivers/net/virtio_net.c:1033
 virtnet_receive drivers/net/virtio_net.c:1323 [inline]
 virtnet_poll+0x666/0x1a10 drivers/net/virtio_net.c:1428
 napi_poll net/core/dev.c:6532 [inline]
 net_rx_action+0x7a6/0x1aa0 net/core/dev.c:6600
 __do_softirq+0x4a1/0x83a kernel/softirq.c:293
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