hrtimer: interrupt took 145089 ns
==================================================================
BUG: KMSAN: uninit-value in prefetch_freepointer mm/slub.c:276 [inline]
BUG: KMSAN: uninit-value in slab_alloc_node mm/slub.c:2746 [inline]
BUG: KMSAN: uninit-value in __kmalloc_node_track_caller+0xe71/0x11b0 mm/slub.c:4395
CPU: 1 PID: 8819 Comm: syz-executor7 Not tainted 4.17.0+ #9
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+0x185/0x1d0 lib/dump_stack.c:113
 kmsan_report+0x188/0x2a0 mm/kmsan/kmsan.c:1125
 __msan_warning_32+0x70/0xc0 mm/kmsan/kmsan_instr.c:620
 prefetch_freepointer mm/slub.c:276 [inline]
 slab_alloc_node mm/slub.c:2746 [inline]
 __kmalloc_node_track_caller+0xe71/0x11b0 mm/slub.c:4395
 __kmalloc_reserve net/core/skbuff.c:138 [inline]
 __alloc_skb+0x2cb/0x9e0 net/core/skbuff.c:206
 alloc_skb_fclone include/linux/skbuff.h:1030 [inline]
 sk_stream_alloc_skb+0x17c/0xcf0 net/ipv4/tcp.c:875
 tcp_sendmsg_locked+0x237e/0x6610 net/ipv4/tcp.c:1290
 tcp_sendmsg+0xb2/0x100 net/ipv4/tcp.c:1447
 inet_sendmsg+0x3fc/0x760 net/ipv4/af_inet.c:798
 sock_sendmsg_nosec net/socket.c:629 [inline]
 sock_sendmsg net/socket.c:639 [inline]
 __sys_sendto+0x6c4/0x7e0 net/socket.c:1789
 __do_sys_sendto net/socket.c:1801 [inline]
 __se_sys_sendto net/socket.c:1797 [inline]
 __x64_sys_sendto+0x1a1/0x210 net/socket.c:1797
 do_syscall_64+0x15b/0x230 arch/x86/entry/common.c:287
 entry_SYSCALL_64_after_hwframe+0x44/0xa9
RIP: 0033:0x455b29
RSP: 002b:00007fcbe95cdc68 EFLAGS: 00000246 ORIG_RAX: 000000000000002c
RAX: ffffffffffffffda RBX: 00007fcbe95ce6d4 RCX: 0000000000455b29
RDX: fffffffffffffeb4 RSI: 0000000020000200 RDI: 0000000000000004
RBP: 000000000072bea0 R08: 0000000020db4ff0 R09: 0000000000000010
R10: 0000000020008011 R11: 0000000000000246 R12: 00000000ffffffff
R13: 00000000004c0f7f R14: 00000000004d0e70 R15: 0000000000000000

Uninit was created at:
 kmsan_save_stack_with_flags mm/kmsan/kmsan.c:282 [inline]
 kmsan_internal_poison_shadow+0xb8/0x1b0 mm/kmsan/kmsan.c:192
 kmsan_kmalloc+0x94/0x100 mm/kmsan/kmsan.c:318
 kmsan_slab_alloc+0x10/0x20 mm/kmsan/kmsan.c:325
 slab_post_alloc_hook mm/slab.h:446 [inline]
 slab_alloc_node mm/slub.c:2753 [inline]
 __kmalloc_node_track_caller+0xb35/0x11b0 mm/slub.c:4395
 __kmalloc_reserve net/core/skbuff.c:138 [inline]
 __alloc_skb+0x2cb/0x9e0 net/core/skbuff.c:206
 alloc_skb include/linux/skbuff.h:988 [inline]
 tcp_xmit_probe_skb net/ipv4/tcp_output.c:3642 [inline]
 tcp_write_wakeup+0x696/0x1ea0 net/ipv4/tcp_output.c:3708
 tcp_send_probe0+0x7c/0x680 net/ipv4/tcp_output.c:3723
 tcp_probe_timer net/ipv4/tcp_timer.c:359 [inline]
 tcp_write_timer_handler+0xe76/0xef0 net/ipv4/tcp_timer.c:577
 tcp_write_timer+0x12b/0x280 net/ipv4/tcp_timer.c:593
 call_timer_fn+0x280/0x5d0 kernel/time/timer.c:1326
 expire_timers kernel/time/timer.c:1363 [inline]
 __run_timers+0xd96/0x11b0 kernel/time/timer.c:1666
 run_timer_softirq+0x43/0x70 kernel/time/timer.c:1692
 __do_softirq+0x592/0x979 kernel/softirq.c:285
==================================================================