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BUG: KMSAN: uninit-value in do_error_trap+0x39b/0x600 arch/x86/kernel/traps.c:297
CPU: 0 PID: 52 Comm: kworker/u4:2 Not tainted 4.16.0+ #83
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Workqueue: netns cleanup_net
Call Trace:
 __dump_stack lib/dump_stack.c:17 [inline]
 dump_stack+0x185/0x1d0 lib/dump_stack.c:53
 kmsan_report+0x142/0x240 mm/kmsan/kmsan.c:1067
 __msan_warning_32+0x6c/0xb0 mm/kmsan/kmsan_instr.c:676
 do_error_trap+0x39b/0x600 arch/x86/kernel/traps.c:297
 do_invalid_op+0x46/0x50 arch/x86/kernel/traps.c:316
 invalid_op+0x1b/0x40 arch/x86/entry/entry_64.S:986
RIP: 0010:xfrm_state_fini+0x30c/0x440 net/xfrm/xfrm_state.c:2346
RSP: 0018:ffff8801ded8fb10 EFLAGS: 00010293
RAX: ffffffff86118c3c RBX: ffff8801bc9518a0 RCX: ffff8801df249d80
RDX: 0000000000000000 RSI: aaaaaaaaaaaab000 RDI: ffffea0000000000
RBP: ffff8801ded8fb70 R08: 0000000001080020 R09: 0000000000000002
R10: 0000000000000000 R11: 0000000180400014 R12: ffff8801df24a698
R13: 0000000000000000 R14: ffff8801d666c700 R15: ffff8801d666d540
 xfrm_net_exit+0x5b/0x70 net/xfrm/xfrm_policy.c:2981
 ops_exit_list net/core/net_namespace.c:142 [inline]
 cleanup_net+0xd1f/0x18a0 net/core/net_namespace.c:517
 process_one_work+0x12c6/0x1f60 kernel/workqueue.c:2113
 worker_thread+0x113c/0x24f0 kernel/workqueue.c:2247
 kthread+0x539/0x720 kernel/kthread.c:239
 ret_from_fork+0x35/0x40 arch/x86/entry/entry_64.S:406

Local variable description: ----oldbit.i.i.i@kfree
Variable was created at:
 kfree+0xcb/0x29e0 mm/slub.c:3931
 ipv4_inetpeer_exit+0x9d/0xc0 net/ipv4/route.c:3060
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