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BUG: KMSAN: uninit-value in hsr_get_node+0xa2e/0xa40 net/hsr/hsr_framereg.c:246
 hsr_get_node+0xa2e/0xa40 net/hsr/hsr_framereg.c:246
 fill_frame_info net/hsr/hsr_forward.c:579 [inline]
 hsr_forward_skb+0x328/0x30f0 net/hsr/hsr_forward.c:616
 hsr_handle_frame+0xa15/0xb40 net/hsr/hsr_slave.c:69
 __netif_receive_skb_core+0x1d13/0x5e90 net/core/dev.c:5385
 __netif_receive_skb_one_core net/core/dev.c:5489 [inline]
 __netif_receive_skb+0xc3/0x5a0 net/core/dev.c:5605
 netif_receive_skb_internal net/core/dev.c:5691 [inline]
 netif_receive_skb+0x58/0x660 net/core/dev.c:5750
 tun_rx_batched+0x83b/0x920
 tun_get_user+0x5461/0x6850 drivers/net/tun.c:1989
 tun_chr_write_iter+0x3af/0x5d0 drivers/net/tun.c:2035
 call_write_iter include/linux/fs.h:1868 [inline]
 new_sync_write fs/read_write.c:491 [inline]
 vfs_write+0x8f9/0x1490 fs/read_write.c:584
 ksys_write+0x20f/0x4c0 fs/read_write.c:637
 __do_sys_write fs/read_write.c:649 [inline]
 __se_sys_write fs/read_write.c:646 [inline]
 __x64_sys_write+0x93/0xd0 fs/read_write.c:646
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x41/0xc0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x63/0xcd

Uninit was created at:
 __alloc_pages+0x9a4/0xe00 mm/page_alloc.c:4791
 alloc_pages+0xd01/0x1040
 skb_page_frag_refill+0x2bf/0x7c0 net/core/sock.c:2854
 tun_build_skb drivers/net/tun.c:1677 [inline]
 tun_get_user+0x11c8/0x6850 drivers/net/tun.c:1817
 tun_chr_write_iter+0x3af/0x5d0 drivers/net/tun.c:2035
 call_write_iter include/linux/fs.h:1868 [inline]
 new_sync_write fs/read_write.c:491 [inline]
 vfs_write+0x8f9/0x1490 fs/read_write.c:584
 ksys_write+0x20f/0x4c0 fs/read_write.c:637
 __do_sys_write fs/read_write.c:649 [inline]
 __se_sys_write fs/read_write.c:646 [inline]
 __x64_sys_write+0x93/0xd0 fs/read_write.c:646
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x41/0xc0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x63/0xcd

CPU: 0 PID: 32314 Comm: syz-executor.2 Not tainted 6.4.0-rc2-syzkaller-gdad188c049f8 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/28/2023
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