==================================================================
BUG: KMSAN: uninit-value in __hlist_del include/linux/list.h:749 [inline]
BUG: KMSAN: uninit-value in detach_timer kernel/time/timer.c:811 [inline]
BUG: KMSAN: uninit-value in expire_timers kernel/time/timer.c:1356 [inline]
BUG: KMSAN: uninit-value in __run_timers+0xb99/0x11a0 kernel/time/timer.c:1685
CPU: 1 PID: 0 Comm: swapper/1 Not tainted 5.2.0+ #15
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
 <IRQ>
 __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
 __hlist_del include/linux/list.h:749 [inline]
 detach_timer kernel/time/timer.c:811 [inline]
 expire_timers kernel/time/timer.c:1356 [inline]
 __run_timers+0xb99/0x11a0 kernel/time/timer.c:1685
 run_timer_softirq+0x2d/0x50 kernel/time/timer.c:1698
 __do_softirq+0x4ad/0x858 kernel/softirq.c:293
 invoke_softirq kernel/softirq.c:375 [inline]
 irq_exit+0x238/0x290 kernel/softirq.c:416
 exiting_irq+0xe/0x10 arch/x86/include/asm/apic.h:536
 smp_apic_timer_interrupt+0x48/0x70 arch/x86/kernel/apic/apic.c:1070
 apic_timer_interrupt+0x2e/0x40 arch/x86/entry/entry_64.S:813
 </IRQ>
RIP: 0010:default_idle+0x232/0x450 arch/x86/kernel/process.c:581
Code: 37 f3 8b 1d 40 8c df 01 48 c7 c7 f0 f5 24 90 e8 f4 42 bb f3 83 38 00 0f 85 a4 01 00 00 85 db 7e 07 0f 00 2d 30 e3 5b 00 fb f4 <65> 8b 05 47 47 bd 71 89 45 c4 8b 1d 16 9e 7f 01 48 c7 c7 f8 07 c5
RSP: 0018:ffff8881280bfde0 EFLAGS: 00000246 ORIG_RAX: ffffffffffffff13
RAX: ffff888217c395f0 RBX: 0000000000000000 RCX: ffff888000000000
RDX: ffff888207e325f0 RSI: 0000160000000000 RDI: 00000000000005f0
RBP: ffff8881280bfe20 R08: 000000001024f5f0 R09: 0000778000000000
R10: ffffd0ffffffffff R11: 0000000000000004 R12: ffff88812d7d8990
R13: 0000000000000000 R14: ffff88812d7d8000 R15: ffff88812d7d8990
 arch_cpu_idle+0x25/0x30 arch/x86/kernel/process.c:571
 default_idle_call kernel/sched/idle.c:94 [inline]
 cpuidle_idle_call kernel/sched/idle.c:154 [inline]
 do_idle+0x1d7/0x790 kernel/sched/idle.c:263
 cpu_startup_entry+0x45/0x50 kernel/sched/idle.c:354
 start_secondary+0x3c0/0x4d0 arch/x86/kernel/smpboot.c:265
 secondary_startup_64+0xa4/0xb0 arch/x86/kernel/head_64.S:243

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_fclone include/linux/skbuff.h:1104 [inline]
 sk_stream_alloc_skb+0x354/0x1110 net/ipv4/tcp.c:875
 tcp_sendmsg_locked+0x26a9/0x6850 net/ipv4/tcp.c:1262
 tcp_sendmsg+0xb2/0x100 net/ipv4/tcp.c:1420
 inet_sendmsg+0x48e/0x750 net/ipv4/af_inet.c:798
 sock_sendmsg_nosec net/socket.c:646 [inline]
 sock_sendmsg net/socket.c:665 [inline]
 sock_write_iter+0x433/0x5a0 net/socket.c:994
 call_write_iter include/linux/fs.h:1872 [inline]
 new_sync_write fs/read_write.c:483 [inline]
 __vfs_write+0xa2c/0xcb0 fs/read_write.c:496
 vfs_write+0x481/0x920 fs/read_write.c:558
 ksys_write+0x265/0x430 fs/read_write.c:611
 __do_sys_write fs/read_write.c:623 [inline]
 __se_sys_write+0x92/0xb0 fs/read_write.c:620
 __x64_sys_write+0x4a/0x70 fs/read_write.c:620
 do_syscall_64+0xbc/0xf0 arch/x86/entry/common.c:302
 entry_SYSCALL_64_after_hwframe+0x63/0xe7
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