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BUG: KMSAN: uninit-value in slab_alloc_node mm/slub.c:2704 [inline]
BUG: KMSAN: uninit-value in __kmalloc_node_track_caller+0x667/0x1160 mm/slub.c:4352
CPU: 1 PID: 6455 Comm: udevd Not tainted 4.19.0-rc1+ #43
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+0x14b/0x190 lib/dump_stack.c:113
 kmsan_report+0x183/0x2b0 mm/kmsan/kmsan.c:956
 __msan_warning+0x70/0xc0 mm/kmsan/kmsan_instr.c:645
 slab_alloc_node mm/slub.c:2704 [inline]
 __kmalloc_node_track_caller+0x667/0x1160 mm/slub.c:4352
 __kmalloc_reserve net/core/skbuff.c:138 [inline]
 __alloc_skb+0x2f5/0x9e0 net/core/skbuff.c:206
 alloc_skb include/linux/skbuff.h:996 [inline]
 netlink_alloc_large_skb net/netlink/af_netlink.c:1189 [inline]
 netlink_sendmsg+0xb49/0x1290 net/netlink/af_netlink.c:1883
 sock_sendmsg_nosec net/socket.c:621 [inline]
 sock_sendmsg net/socket.c:631 [inline]
 ___sys_sendmsg+0xe70/0x1290 net/socket.c:2114
 __sys_sendmsg net/socket.c:2152 [inline]
 __do_sys_sendmsg net/socket.c:2161 [inline]
 __se_sys_sendmsg+0x2a3/0x3d0 net/socket.c:2159
 __x64_sys_sendmsg+0x4a/0x70 net/socket.c:2159
 do_syscall_64+0xb8/0x100 arch/x86/entry/common.c:291
 entry_SYSCALL_64_after_hwframe+0x63/0xe7
RIP: 0033:0x7fa404fb9320
Code: 02 48 83 c8 ff eb 8d 48 8b 05 14 7b 2a 00 f7 da 64 89 10 48 83 c8 ff eb c9 90 83 3d d5 d2 2a 00 00 75 10 b8 2e 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 31 c3 48 83 ec 08 e8 5e ba 00 00 48 89 04 24
RSP: 002b:00007ffc571fd5b8 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007fa404fb9320
RDX: 0000000000000000 RSI: 00007ffc571fd600 RDI: 000000000000000b
RBP: 0000000000000000 R08: 0000000000000000 R09: 00007fa405001a60
R10: 736563697665642f R11: 0000000000000246 R12: 0000000001d07000
R13: 00000000000000b2 R14: 0000000000000000 R15: 000000000000000b

Uninit was created at:
 kmsan_save_stack_with_flags mm/kmsan/kmsan.c:256 [inline]
 kmsan_internal_poison_shadow+0xb8/0x1b0 mm/kmsan/kmsan.c:181
 kmsan_kmalloc+0x98/0x100 mm/kmsan/kmsan_hooks.c:91
 kmsan_slab_alloc+0x10/0x20 mm/kmsan/kmsan_hooks.c:100
 slab_post_alloc_hook mm/slab.h:446 [inline]
 slab_alloc_node mm/slub.c:2719 [inline]
 __kmalloc_node_track_caller+0x9e7/0x1160 mm/slub.c:4352
 __kmalloc_reserve net/core/skbuff.c:138 [inline]
 __alloc_skb+0x2f5/0x9e0 net/core/skbuff.c:206
 alloc_skb_fclone include/linux/skbuff.h:1038 [inline]
 sk_stream_alloc_skb+0x172/0xc90 net/ipv4/tcp.c:874
 tso_fragment net/ipv4/tcp_output.c:1860 [inline]
 tcp_write_xmit+0x2677/0xa5a0 net/ipv4/tcp_output.c:2354
 tcp_tsq_write+0x3ec/0x440 net/ipv4/tcp_output.c:801
 tcp_tsq_handler net/ipv4/tcp_output.c:810 [inline]
 tcp_pace_kick+0x115/0x270 net/ipv4/tcp_output.c:974
 __run_hrtimer kernel/time/hrtimer.c:1398 [inline]
 __hrtimer_run_queues+0xbfc/0x15b0 kernel/time/hrtimer.c:1460
 hrtimer_run_softirq+0x1b3/0x2b0 kernel/time/hrtimer.c:1474
 __do_softirq+0x562/0x948 kernel/softirq.c:292
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