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BUG: KMSAN: uninit-value in rcu_segcblist_pend_cbs+0xa9/0xf0 kernel/rcu/rcu_segcblist.c:104
CPU: 1 PID: 9 Comm: rcu_sched Not tainted 4.17.0-rc5+ #101
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+0x149/0x260 mm/kmsan/kmsan.c:1084
 __msan_warning_32+0x6e/0xc0 mm/kmsan/kmsan_instr.c:686
 rcu_segcblist_pend_cbs+0xa9/0xf0 kernel/rcu/rcu_segcblist.c:104
 rcu_advance_cbs kernel/rcu/tree.c:1850 [inline]
 __note_gp_changes+0x1be/0x950 kernel/rcu/tree.c:1887
 rcu_gp_cleanup kernel/rcu/tree.c:2148 [inline]
 rcu_gp_kthread+0x2fa9/0x38d0 kernel/rcu/tree.c:2280
 kthread+0x4e3/0x6d0 kernel/kthread.c:241
 ret_from_fork+0x35/0x40 arch/x86/entry/entry_64.S:412

Uninit was stored to memory at:
 kmsan_save_stack_with_flags mm/kmsan/kmsan.c:279 [inline]
 kmsan_save_stack mm/kmsan/kmsan.c:294 [inline]
 kmsan_internal_chain_origin+0x12b/0x210 mm/kmsan/kmsan.c:685
 __msan_chain_origin+0x69/0xc0 mm/kmsan/kmsan_instr.c:529
 rcu_segcblist_enqueue+0x275/0x2d0 kernel/rcu/rcu_segcblist.c:151
 __call_rcu+0x227/0xef0 kernel/rcu/tree.c:3057
 kfree_call_rcu+0x35/0x40 kernel/rcu/tree.c:3139
 sock_destroy_inode+0x71/0xd0 net/socket.c:272
 destroy_inode fs/inode.c:266 [inline]
 evict+0xc7b/0xda0 fs/inode.c:574
 iput_final fs/inode.c:1519 [inline]
 iput+0xa9a/0xe30 fs/inode.c:1545
 dentry_unlink_inode+0x84b/0x8a0 fs/dcache.c:376
 __dentry_kill+0x86e/0xd20 fs/dcache.c:568
 dentry_kill+0x1a9/0xc70 fs/dcache.c:674
 dput+0x277/0x560 fs/dcache.c:850
 __fput+0x933/0xa10 fs/file_table.c:227
 ____fput+0x37/0x40 fs/file_table.c:243
 task_work_run+0x243/0x2c0 kernel/task_work.c:113
 exit_task_work include/linux/task_work.h:22 [inline]
 do_exit+0x10e1/0x38d0 kernel/exit.c:867
 do_group_exit+0x1a0/0x360 kernel/exit.c:970
 __do_sys_exit_group+0x21/0x30 kernel/exit.c:981
 __se_sys_exit_group+0x14/0x20 kernel/exit.c:979
 __x64_sys_exit_group+0x4c/0x50 kernel/exit.c:979
 do_syscall_64+0x154/0x220 arch/x86/entry/common.c:287
 entry_SYSCALL_64_after_hwframe+0x44/0xa9
Uninit was created at:
 kmsan_save_stack_with_flags mm/kmsan/kmsan.c:279 [inline]
 kmsan_alloc_meta_for_pages+0x161/0x3a0 mm/kmsan/kmsan.c:815
 kmsan_alloc_page+0x82/0xe0 mm/kmsan/kmsan.c:885
 __alloc_pages_nodemask+0xf8e/0x5dd0 mm/page_alloc.c:4402
 alloc_pages_current+0x6b5/0x970 mm/mempolicy.c:2093
 alloc_pages include/linux/gfp.h:494 [inline]
 alloc_slab_page mm/slub.c:1467 [inline]
 allocate_slab mm/slub.c:1612 [inline]
 new_slab+0x349/0x1b60 mm/slub.c:1683
 new_slab_objects mm/slub.c:2464 [inline]
 ___slab_alloc+0x1512/0x1f60 mm/slub.c:2616
 __slab_alloc mm/slub.c:2656 [inline]
 slab_alloc_node mm/slub.c:2719 [inline]
 slab_alloc mm/slub.c:2761 [inline]
 kmem_cache_alloc+0x648/0xb90 mm/slub.c:2766
 sock_alloc_inode+0x5f/0x2b0 net/socket.c:243
 alloc_inode fs/inode.c:209 [inline]
 new_inode_pseudo+0x8a/0x430 fs/inode.c:894
 sock_alloc net/socket.c:564 [inline]
 __sock_create+0x392/0xf60 net/socket.c:1249
 sock_create net/socket.c:1325 [inline]
 __sys_socket+0x179/0x640 net/socket.c:1355
 __do_sys_socket net/socket.c:1364 [inline]
 __se_sys_socket net/socket.c:1362 [inline]
 __x64_sys_socket+0xd8/0x120 net/socket.c:1362
 do_syscall_64+0x154/0x220 arch/x86/entry/common.c:287
 entry_SYSCALL_64_after_hwframe+0x44/0xa9
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