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BUG: KMSAN: uninit-value in hsr_register_frame_in+0x378/0x380 net/hsr/hsr_framereg.c:468
 hsr_register_frame_in+0x378/0x380 net/hsr/hsr_framereg.c:468
 hsr_forward_skb+0xe1a/0x3630 net/hsr/hsr_forward.c:622
 hsr_handle_frame+0x9e7/0xad0 net/hsr/hsr_slave.c:69
 __netif_receive_skb_core+0x214a/0x6350 net/core/dev.c:5297
 __netif_receive_skb_one_core net/core/dev.c:5403 [inline]
 __netif_receive_skb+0xf7/0x640 net/core/dev.c:5519
 netif_receive_skb_internal+0x1b7/0x3d0 net/core/dev.c:5605
 netif_receive_skb+0x4d/0x360 net/core/dev.c:5664
 tun_rx_batched+0xa93/0xd00
 tun_get_user+0x4344/0x4e90 drivers/net/tun.c:1985
 tun_chr_write_iter+0x459/0x610 drivers/net/tun.c:2015
 call_write_iter include/linux/fs.h:2050 [inline]
 new_sync_write fs/read_write.c:504 [inline]
 vfs_write+0x10ab/0x1d40 fs/read_write.c:591
 ksys_write+0x28f/0x510 fs/read_write.c:644
 __do_sys_write fs/read_write.c:656 [inline]
 __se_sys_write fs/read_write.c:653 [inline]
 __x64_sys_write+0xdb/0x120 fs/read_write.c:653
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x3d/0xb0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x44/0xae

Uninit was stored to memory at:
 hsr_add_node+0x7ca/0x1020 net/hsr/hsr_framereg.c:195
 hsr_get_node+0xa74/0xb80 net/hsr/hsr_framereg.c:277
 fill_frame_info net/hsr/hsr_forward.c:584 [inline]
 hsr_forward_skb+0x5ad/0x3630 net/hsr/hsr_forward.c:619
 hsr_handle_frame+0x9e7/0xad0 net/hsr/hsr_slave.c:69
 __netif_receive_skb_core+0x214a/0x6350 net/core/dev.c:5297
 __netif_receive_skb_one_core net/core/dev.c:5403 [inline]
 __netif_receive_skb+0xf7/0x640 net/core/dev.c:5519
 netif_receive_skb_internal+0x1b7/0x3d0 net/core/dev.c:5605
 netif_receive_skb+0x4d/0x360 net/core/dev.c:5664
 tun_rx_batched+0xa93/0xd00
 tun_get_user+0x4344/0x4e90 drivers/net/tun.c:1985
 tun_chr_write_iter+0x459/0x610 drivers/net/tun.c:2015
 call_write_iter include/linux/fs.h:2050 [inline]
 new_sync_write fs/read_write.c:504 [inline]
 vfs_write+0x10ab/0x1d40 fs/read_write.c:591
 ksys_write+0x28f/0x510 fs/read_write.c:644
 __do_sys_write fs/read_write.c:656 [inline]
 __se_sys_write fs/read_write.c:653 [inline]
 __x64_sys_write+0xdb/0x120 fs/read_write.c:653
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x3d/0xb0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x44/0xae

Uninit was created at:
 __alloc_pages+0x8ae/0x1040 mm/page_alloc.c:5448
 alloc_pages+0x98c/0xca0
 skb_page_frag_refill+0x35f/0x8f0 net/core/sock.c:2731
 tun_build_skb+0x244/0x19c0 drivers/net/tun.c:1658
 tun_get_user+0x1055/0x4e90 drivers/net/tun.c:1798
 tun_chr_write_iter+0x459/0x610 drivers/net/tun.c:2015
 call_write_iter include/linux/fs.h:2050 [inline]
 new_sync_write fs/read_write.c:504 [inline]
 vfs_write+0x10ab/0x1d40 fs/read_write.c:591
 ksys_write+0x28f/0x510 fs/read_write.c:644
 __do_sys_write fs/read_write.c:656 [inline]
 __se_sys_write fs/read_write.c:653 [inline]
 __x64_sys_write+0xdb/0x120 fs/read_write.c:653
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x3d/0xb0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x44/0xae

CPU: 0 PID: 31491 Comm: syz-executor.3 Not tainted 5.18.0-syzkaller-16253-g2f3064574275 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
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