==================================================================
BUG: KMSAN: uninit-value in bond_xmit_roundrobin drivers/net/bonding/bond_main.c:3879 [inline]
BUG: KMSAN: uninit-value in __bond_start_xmit drivers/net/bonding/bond_main.c:4156 [inline]
BUG: KMSAN: uninit-value in bond_start_xmit+0x199b/0x2c30 drivers/net/bonding/bond_main.c:4190
CPU: 0 PID: 14831 Comm: syz-executor.2 Not tainted 5.2.0+ #15
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+0x191/0x1f0 lib/dump_stack.c:113
 kmsan_report+0x162/0x2d0 mm/kmsan/kmsan_report.c:109
 __msan_warning+0x75/0xe0 mm/kmsan/kmsan_instr.c:294
 bond_xmit_roundrobin drivers/net/bonding/bond_main.c:3879 [inline]
 __bond_start_xmit drivers/net/bonding/bond_main.c:4156 [inline]
 bond_start_xmit+0x199b/0x2c30 drivers/net/bonding/bond_main.c:4190
 __netdev_start_xmit include/linux/netdevice.h:4406 [inline]
 netdev_start_xmit include/linux/netdevice.h:4420 [inline]
 xmit_one net/core/dev.c:3288 [inline]
 dev_hard_start_xmit+0x51a/0xab0 net/core/dev.c:3304
 __dev_queue_xmit+0x394d/0x4270 net/core/dev.c:3877
 dev_queue_xmit+0x4b/0x60 net/core/dev.c:3910
 packet_snd net/packet/af_packet.c:2941 [inline]
 packet_sendmsg+0x83f7/0x9290 net/packet/af_packet.c:2966
 sock_sendmsg_nosec net/socket.c:646 [inline]
 sock_sendmsg net/socket.c:665 [inline]
 __sys_sendto+0xa95/0xb90 net/socket.c:1958
 __do_sys_sendto net/socket.c:1970 [inline]
 __se_sys_sendto+0x107/0x130 net/socket.c:1966
 __x64_sys_sendto+0x6e/0x90 net/socket.c:1966
 do_syscall_64+0xbc/0xf0 arch/x86/entry/common.c:302
 entry_SYSCALL_64_after_hwframe+0x63/0xe7
RIP: 0033:0x459829
Code: fd b7 fb ff c3 66 2e 0f 1f 84 00 00 00 00 00 66 90 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 0f 83 cb b7 fb ff c3 66 2e 0f 1f 84 00 00 00 00
RSP: 002b:00007fbb7a5bac78 EFLAGS: 00000246 ORIG_RAX: 000000000000002c
RAX: ffffffffffffffda RBX: 0000000000000006 RCX: 0000000000459829
RDX: 000000000000000e RSI: 00000000200001c0 RDI: 0000000000000003
RBP: 000000000075bf20 R08: 0000000020000240 R09: 0000000000000080
R10: 0000000000000000 R11: 0000000000000246 R12: 00007fbb7a5bb6d4
R13: 00000000004c77ba R14: 00000000004dcf48 R15: 00000000ffffffff

Uninit was created at:
 kmsan_save_stack_with_flags mm/kmsan/kmsan.c:187 [inline]
 kmsan_internal_poison_shadow+0x53/0xa0 mm/kmsan/kmsan.c:146
 kmsan_slab_alloc+0xaa/0x120 mm/kmsan/kmsan_hooks.c:175
 slab_alloc_node mm/slub.c:2771 [inline]
 __kmalloc_node_track_caller+0xc8f/0xf10 mm/slub.c:4389
 __kmalloc_reserve net/core/skbuff.c:138 [inline]
 __alloc_skb+0x306/0xa10 net/core/skbuff.c:206
 alloc_skb include/linux/skbuff.h:1055 [inline]
 alloc_skb_with_frags+0x18c/0xa80 net/core/skbuff.c:5328
 sock_alloc_send_pskb+0xafd/0x10a0 net/core/sock.c:2219
 packet_alloc_skb net/packet/af_packet.c:2789 [inline]
 packet_snd net/packet/af_packet.c:2884 [inline]
 packet_sendmsg+0x6627/0x9290 net/packet/af_packet.c:2966
 sock_sendmsg_nosec net/socket.c:646 [inline]
 sock_sendmsg net/socket.c:665 [inline]
 __sys_sendto+0xa95/0xb90 net/socket.c:1958
 __do_sys_sendto net/socket.c:1970 [inline]
 __se_sys_sendto+0x107/0x130 net/socket.c:1966
 __x64_sys_sendto+0x6e/0x90 net/socket.c:1966
 do_syscall_64+0xbc/0xf0 arch/x86/entry/common.c:302
 entry_SYSCALL_64_after_hwframe+0x63/0xe7
==================================================================