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BUG: KMSAN: uninit-value in ip_tunnel_xmit+0x54f/0x3da0
 ip_tunnel_xmit+0x54f/0x3da0
 ipgre_xmit+0x1242/0x12b0
 xmit_one+0x2e3/0x830
 dev_hard_start_xmit+0x185/0x410
 __dev_queue_xmit+0x21f5/0x3470
 dev_queue_xmit+0x4f/0x60
 packet_sendmsg+0x62d8/0x7ad0
 ____sys_sendmsg+0xe14/0x12c0
 ___sys_sendmsg+0x471/0x510
 __sys_sendmsg+0x3ab/0x530
 __ia32_compat_sys_sendmsg+0xf1/0x130
 __do_fast_syscall_32+0x95/0xf0
 do_fast_syscall_32+0x33/0x70
 do_SYSENTER_32+0x1b/0x20
 entry_SYSENTER_compat_after_hwframe+0x4d/0x5c

Uninit was created at:
 __kmalloc_node_track_caller+0xdee/0x14e0
 pskb_expand_head+0x271/0x1fc0
 ipgre_xmit+0xab6/0x12b0
 xmit_one+0x2e3/0x830
 dev_hard_start_xmit+0x185/0x410
 __dev_queue_xmit+0x21f5/0x3470
 dev_queue_xmit+0x4f/0x60
 packet_sendmsg+0x62d8/0x7ad0
 ____sys_sendmsg+0xe14/0x12c0
 ___sys_sendmsg+0x471/0x510
 __sys_sendmsg+0x3ab/0x530
 __ia32_compat_sys_sendmsg+0xf1/0x130
 __do_fast_syscall_32+0x95/0xf0
 do_fast_syscall_32+0x33/0x70
 do_SYSENTER_32+0x1b/0x20
 entry_SYSENTER_compat_after_hwframe+0x4d/0x5c

CPU: 0 PID: 20686 Comm: syz-executor.4 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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