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BUG: KMSAN: uninit-value in dup_mmap kernel/fork.c:546 [inline]
BUG: KMSAN: uninit-value in dup_mm kernel/fork.c:1321 [inline]
BUG: KMSAN: uninit-value in copy_mm kernel/fork.c:1376 [inline]
BUG: KMSAN: uninit-value in copy_process+0x6ab7/0xafe0 kernel/fork.c:1920
CPU: 1 PID: 10886 Comm: syz-executor3 Not tainted 5.0.0-rc1+ #7
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
 __msan_warning+0x82/0xf0 mm/kmsan/kmsan_instr.c:313
 dup_mmap kernel/fork.c:546 [inline]
 dup_mm kernel/fork.c:1321 [inline]
 copy_mm kernel/fork.c:1376 [inline]
 copy_process+0x6ab7/0xafe0 kernel/fork.c:1920
 _do_fork+0x384/0x1050 kernel/fork.c:2219
 __do_sys_clone kernel/fork.c:2326 [inline]
 __se_sys_clone+0xf6/0x110 kernel/fork.c:2320
 __x64_sys_clone+0x62/0x80 kernel/fork.c:2320
 do_syscall_64+0xbc/0xf0 arch/x86/entry/common.c:291
 entry_SYSCALL_64_after_hwframe+0x63/0xe7
RIP: 0033:0x45666a
Code: f7 d8 64 89 04 25 d4 02 00 00 64 4c 8b 0c 25 10 00 00 00 31 d2 4d 8d 91 d0 02 00 00 31 f6 bf 11 00 20 01 b8 38 00 00 00 0f 05 <48> 3d 00 f0 ff ff 0f 87 f5 00 00 00 85 c0 41 89 c5 0f 85 fc 00 00
RSP: 002b:0000000000a4fd50 EFLAGS: 00000246 ORIG_RAX: 0000000000000038
RAX: ffffffffffffffda RBX: 0000000000a4fd50 RCX: 000000000045666a
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000001200011
RBP: 0000000000a4fd90 R08: 0000000000000001 R09: 0000000001706940
R10: 0000000001706c10 R11: 0000000000000246 R12: 0000000000000001
R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000003

Uninit was created at:
No stack
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