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BUG: KMSAN: uninit-value in atomic64_add_unless arch/x86/include/asm/atomic64_64.h:204 [inline]
BUG: KMSAN: uninit-value in __fget fs/file.c:693 [inline]
BUG: KMSAN: uninit-value in __fget_light+0x5fb/0x710 fs/file.c:740
FAULT_INJECTION: forcing a failure.
name failslab, interval 1, probability 0, space 0, times 0
CPU: 0 PID: 8706 Comm: syz-executor0 Not tainted 4.16.0+ #86
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+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:683
 atomic64_add_unless arch/x86/include/asm/atomic64_64.h:204 [inline]
 __fget fs/file.c:693 [inline]
 __fget_light+0x5fb/0x710 fs/file.c:740
 __fdget+0x4e/0x60 fs/file.c:748
 fdget include/linux/file.h:57 [inline]
 do_pollfd fs/select.c:816 [inline]
 do_poll fs/select.c:877 [inline]
 do_sys_poll+0x10b7/0x20e0 fs/select.c:971
 SYSC_poll+0x2d2/0x560 fs/select.c:1029
 SyS_poll+0x54/0x80 fs/select.c:1017
 do_syscall_64+0x309/0x430 arch/x86/entry/common.c:287
 entry_SYSCALL_64_after_hwframe+0x3d/0xa2
RIP: 0033:0x455389
RSP: 002b:00007f4c1084ac68 EFLAGS: 00000246 ORIG_RAX: 0000000000000007
RAX: ffffffffffffffda RBX: 00007f4c1084b6d4 RCX: 0000000000455389
RDX: 0000000000000006 RSI: 0000000000000001 RDI: 0000000020000040
RBP: 000000000072bea0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00000000ffffffff
R13: 000000000000046b R14: 00000000006f9aa8 R15: 0000000000000000

CPU: 1 PID: 8711 Comm: syz-executor1 Not tainted 4.16.0+ #86
Uninit was created at:
 kmsan_save_stack_with_flags mm/kmsan/kmsan.c:278 [inline]
 kmsan_internal_poison_shadow+0xb8/0x1b0 mm/kmsan/kmsan.c:188
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
 kmsan_kmalloc+0x94/0x100 mm/kmsan/kmsan.c:314
 __kmalloc+0x23c/0x350 mm/slub.c:3791
Call Trace:
 kmalloc include/linux/slab.h:517 [inline]
 sock_alloc_inode+0xb9/0x2b0 net/socket.c:247
 alloc_inode fs/inode.c:209 [inline]
 new_inode_pseudo+0x8a/0x430 fs/inode.c:890
 __dump_stack lib/dump_stack.c:17 [inline]
 dump_stack+0x185/0x1d0 lib/dump_stack.c:53
 sock_alloc net/socket.c:565 [inline]
 __sock_create+0x392/0xf60 net/socket.c:1249
 sock_create net/socket.c:1325 [inline]
 SYSC_socket+0x16e/0x620 net/socket.c:1355
 fail_dump lib/fault-inject.c:51 [inline]
 should_fail+0x87b/0xab0 lib/fault-inject.c:149
 SyS_socket+0x53/0x80 net/socket.c:1335
 should_failslab+0x279/0x2a0 mm/failslab.c:32
 do_syscall_64+0x309/0x430 arch/x86/entry/common.c:287
 entry_SYSCALL_64_after_hwframe+0x3d/0xa2
 slab_pre_alloc_hook mm/slab.h:422 [inline]
 slab_alloc_node mm/slub.c:2663 [inline]
 slab_alloc mm/slub.c:2745 [inline]
 __kmalloc+0xc2/0x350 mm/slub.c:3785
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