Call Trace:
 __dump_stack lib/dump_stack.c:17 [inline]
 dump_stack+0x185/0x1d0 lib/dump_stack.c:53
 fail_dump lib/fault-inject.c:51 [inline]
 should_fail+0x87b/0xab0 lib/fault-inject.c:149
 should_failslab+0x279/0x2a0 mm/failslab.c:32
==================================================================
BUG: KMSAN: uninit-value in update_stack_state+0x673/0xa40 arch/x86/kernel/unwind_frame.c:222
CPU: 0 PID: 6335 Comm: syz-executor6 Not tainted 4.16.0+ #84
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
 __dump_stack lib/dump_stack.c:17 [inline]
 dump_stack+0x14a/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
 update_stack_state+0x673/0xa40 arch/x86/kernel/unwind_frame.c:222
 unwind_next_frame+0x618/0xe50 arch/x86/kernel/unwind_frame.c:329
 show_trace_log_lvl+0xb49/0x1030 arch/x86/kernel/dumpstack.c:212
 show_stack+0xfc/0x150 arch/x86/kernel/dumpstack.c:236
 __dump_stack lib/dump_stack.c:17 [inline]
 dump_stack+0x185/0x1d0 lib/dump_stack.c:53
 fail_dump lib/fault-inject.c:51 [inline]
 should_fail+0x87b/0xab0 lib/fault-inject.c:149
 should_failslab+0x279/0x2a0 mm/failslab.c:32
 slab_pre_alloc_hook mm/slab.h:422 [inline]
 slab_alloc_node mm/slub.c:2663 [inline]
 slab_alloc mm/slub.c:2745 [inline]
 kmem_cache_alloc+0x136/0xb90 mm/slub.c:2750
 radix_tree_node_alloc+0x135/0x5c0 lib/radix-tree.c:398
 __radix_tree_create+0x66d/0xc40 lib/radix-tree.c:839
 __radix_tree_insert+0x17d/0x580 lib/radix-tree.c:994
 radix_tree_insert include/linux/radix-tree.h:296 [inline]
 shmem_add_to_page_cache+0x575/0xae0 mm/shmem.c:615
 shmem_getpage_gfp+0x40c0/0x5770 mm/shmem.c:1810
 shmem_fault+0x519/0x9b0 mm/shmem.c:2006
 __do_fault mm/memory.c:3238 [inline]
 do_shared_fault mm/memory.c:3703 [inline]
 do_fault mm/memory.c:3752 [inline]
 handle_pte_fault mm/memory.c:3979 [inline]
 __handle_mm_fault mm/memory.c:4103 [inline]
 handle_mm_fault+0x362d/0x7ba0 mm/memory.c:4140
 __do_page_fault+0xec4/0x1a10 arch/x86/mm/fault.c:1423
 do_page_fault+0xd3/0x260 arch/x86/mm/fault.c:1500
 page_fault+0x25/0x50 arch/x86/entry/entry_64.S:1151
RIP: 0010:copy_siginfo_to_user+0x13f/0x1270 kernel/signal.c:2873
RSP: 0018:ffff8801b86afcc8 EFLAGS: 00010246
RAX: 0000000000000000 RBX: 0000000000000020 RCX: ffff880000000000
RDX: ffff8801649ffd58 RSI: aaaaaaaaaaaab000 RDI: ffffea0000000000
RBP: ffff8801b86afd48 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000000 R12: 0000000020a6dff0
R13: ffff8801b86afd58 R14: 0000000000000000 R15: ffff8801b86afd60
 SYSC_rt_sigtimedwait+0x3ae/0x430 kernel/signal.c:3201
 SyS_rt_sigtimedwait+0x66/0x90 kernel/signal.c:3177
 do_syscall_64+0x309/0x430 arch/x86/entry/common.c:287
 entry_SYSCALL_64_after_hwframe+0x3d/0xa2
RIP: 0033:0x455379
RSP: 002b:00007f371f63ac68 EFLAGS: 00000246 ORIG_RAX: 0000000000000080
RAX: ffffffffffffffda RBX: 00007f371f63b6d4 RCX: 0000000000455379
RDX: 000000002005b000 RSI: 0000000020a6dff0 RDI: 000000002031bff8
RBP: 000000000072bea0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000008 R11: 0000000000000246 R12: 0000000000000013
R13: 00000000000004b0 R14: 00000000006fa120 R15: 0000000000000000

Local variable description: ----oc.i.i@__alloc_pages_nodemask
Variable was created at:
 __alloc_pages_nodemask+0x10f/0x5dc0 mm/page_alloc.c:4238
 alloc_pages_vma+0xcc8/0x1800 mm/mempolicy.c:2019
==================================================================