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BUG: KMSAN: uninit-value in __do_sys_waitid kernel/exit.c:1612 [inline]
BUG: KMSAN: uninit-value in __se_sys_waitid+0x329/0xb20 kernel/exit.c:1592
CPU: 0 PID: 10923 Comm: syz-executor790 Not tainted 5.0.0-rc1+ #9
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+0x173/0x1d0 lib/dump_stack.c:113
 kmsan_report+0x12e/0x2a0 mm/kmsan/kmsan.c:600
 kmsan_internal_check_memory+0x9e4/0xb10 mm/kmsan/kmsan.c:692
 kmsan_check_memory+0xd/0x10 mm/kmsan/kmsan.c:699
 __do_sys_waitid kernel/exit.c:1612 [inline]
 __se_sys_waitid+0x329/0xb20 kernel/exit.c:1592
 __x64_sys_waitid+0x62/0x80 kernel/exit.c:1592
 do_syscall_64+0xbc/0xf0 arch/x86/entry/common.c:291
 entry_SYSCALL_64_after_hwframe+0x63/0xe7
RIP: 0033:0x43ffb9
Code: 18 89 d0 c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 0f 83 fb 13 fc ff c3 66 2e 0f 1f 84 00 00 00 00
RSP: 002b:00007ffc16b98608 EFLAGS: 00000246 ORIG_RAX: 00000000000000f7
RAX: ffffffffffffffda RBX: 00000000004002c8 RCX: 000000000043ffb9
RDX: 00000000200000c0 RSI: 0000000000000000 RDI: 0000000000000002
RBP: 00000000006ca018 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000001 R11: 0000000000000246 R12: 0000000000401840
R13: 00000000004018d0 R14: 0000000000000000 R15: 0000000000000000

Local variable description: ----__pu_val120.i@__se_sys_waitid
Variable was created at:
 __se_sys_waitid+0x18c/0xb20 kernel/exit.c:1592
 __x64_sys_waitid+0x62/0x80 kernel/exit.c:1592

Bytes 0-3 of 4 are uninitialized
Memory access of size 4 starts at ffff88809b73fe78
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