==================================================================
BUG: KMSAN: uninit-value in __list_del_entry_valid+0x2f5/0x450 lib/list_debug.c:51
CPU: 1 PID: 14480 Comm: syz-executor0 Not tainted 4.20.0-rc2+ #87
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+0x32d/0x480 lib/dump_stack.c:113
 kmsan_report+0x19f/0x300 mm/kmsan/kmsan.c:911
 __msan_warning+0x76/0xc0 mm/kmsan/kmsan_instr.c:415
 __list_del_entry_valid+0x2f5/0x450 lib/list_debug.c:51
 __list_del_entry include/linux/list.h:117 [inline]
 list_del include/linux/list.h:125 [inline]
 cma_cancel_listens+0x69/0x7f0 drivers/infiniband/core/cma.c:1719
 cma_cancel_operation drivers/infiniband/core/cma.c:1747 [inline]
 rdma_destroy_id+0x7b6/0x2140 drivers/infiniband/core/cma.c:1811
 ucma_close+0x437/0x650 drivers/infiniband/core/ucma.c:1770
 __fput+0x4d8/0xdf0 fs/file_table.c:278
 ____fput+0x37/0x40 fs/file_table.c:309
 task_work_run+0x48e/0x520 kernel/task_work.c:113
 tracehook_notify_resume include/linux/tracehook.h:188 [inline]
 exit_to_usermode_loop arch/x86/entry/common.c:166 [inline]
 prepare_exit_to_usermode+0x3b4/0x4c0 arch/x86/entry/common.c:197
 syscall_return_slowpath+0xed/0x730 arch/x86/entry/common.c:268
 do_syscall_64+0xf5/0x110 arch/x86/entry/common.c:294
 entry_SYSCALL_64_after_hwframe+0x63/0xe7
RIP: 0033:0x411021
Code: 75 14 b8 03 00 00 00 0f 05 48 3d 01 f0 ff ff 0f 83 34 19 00 00 c3 48 83 ec 08 e8 0a fc ff ff 48 89 04 24 b8 03 00 00 00 0f 05 <48> 8b 3c 24 48 89 c2 e8 53 fc ff ff 48 89 d0 48 83 c4 08 48 3d 01
RSP: 002b:0000000000a3fd90 EFLAGS: 00000293 ORIG_RAX: 0000000000000003
RAX: 0000000000000000 RBX: 0000000000000005 RCX: 0000000000411021
RDX: 0000000000000000 RSI: 00000000007310b0 RDI: 0000000000000004
RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000a3fcc0 R11: 0000000000000293 R12: 0000000000000000
R13: 0000000000000001 R14: 0000000000000114 R15: 0000000000000000

Uninit was created at:
 kmsan_save_stack_with_flags mm/kmsan/kmsan.c:252 [inline]
 kmsan_internal_poison_shadow+0xc8/0x1c0 mm/kmsan/kmsan.c:177
 kmsan_kmalloc+0x98/0xf0 mm/kmsan/kmsan_hooks.c:104
 kmsan_slab_alloc+0xe/0x10 mm/kmsan/kmsan_hooks.c:113
 slab_post_alloc_hook mm/slab.h:446 [inline]
 slab_alloc_node mm/slub.c:2765 [inline]
 __kmalloc_node_track_caller+0xf62/0x14e0 mm/slub.c:4396
 __kmalloc_reserve net/core/skbuff.c:138 [inline]
 __alloc_skb+0x42b/0xeb0 net/core/skbuff.c:206
 alloc_skb include/linux/skbuff.h:998 [inline]
 alloc_uevent_skb+0x14c/0x430 lib/kobject_uevent.c:288
 uevent_net_broadcast_untagged lib/kobject_uevent.c:324 [inline]
 kobject_uevent_net_broadcast lib/kobject_uevent.c:406 [inline]
 kobject_uevent_env+0x1b0e/0x2750 lib/kobject_uevent.c:587
 kvm_uevent_notify_change+0x969/0x9e0 arch/x86/kvm/../../../virt/kvm/kvm_main.c:3930
 kvm_destroy_vm arch/x86/kvm/../../../virt/kvm/kvm_main.c:729 [inline]
 kvm_put_kvm+0x103/0x1d00 arch/x86/kvm/../../../virt/kvm/kvm_main.c:770
 kvm_vm_release+0x67/0x90 arch/x86/kvm/../../../virt/kvm/kvm_main.c:781
 __fput+0x4d8/0xdf0 fs/file_table.c:278
 ____fput+0x37/0x40 fs/file_table.c:309
 task_work_run+0x48e/0x520 kernel/task_work.c:113
 tracehook_notify_resume include/linux/tracehook.h:188 [inline]
 exit_to_usermode_loop arch/x86/entry/common.c:166 [inline]
 prepare_exit_to_usermode+0x3b4/0x4c0 arch/x86/entry/common.c:197
 syscall_return_slowpath+0xed/0x730 arch/x86/entry/common.c:268
 do_syscall_64+0xf5/0x110 arch/x86/entry/common.c:294
 entry_SYSCALL_64_after_hwframe+0x63/0xe7
==================================================================