syzbot

==================================================================
BUG: KMSAN: uninit-value in bpf_convert_filter+0x2a33/0x5c50 net/core/filter.c:603
CPU: 0 PID: 12573 Comm: syz-executor.3 Not tainted 5.0.0+ #11
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
 bpf_convert_filter+0x2a33/0x5c50 net/core/filter.c:603
 bpf_migrate_filter net/core/filter.c:1245 [inline]
 bpf_prepare_filter+0x15e4/0x1c90 net/core/filter.c:1323
 __get_filter+0x4f8/0x730 net/core/filter.c:1492
 sk_attach_filter+0x72/0x2e0 net/core/filter.c:1507
 sock_setsockopt+0x396f/0x4bb0 net/core/sock.c:895
 __sys_setsockopt+0x336/0x540 net/socket.c:1897
 __do_sys_setsockopt net/socket.c:1912 [inline]
 __se_sys_setsockopt+0xdd/0x100 net/socket.c:1909
 __x64_sys_setsockopt+0x62/0x80 net/socket.c:1909
 do_syscall_64+0xbc/0xf0 arch/x86/entry/common.c:291
 entry_SYSCALL_64_after_hwframe+0x63/0xe7
RIP: 0033:0x457f29
Code: ad b8 fb ff c3 66 2e 0f 1f 84 00 00 00 00 00 66 90 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 7b b8 fb ff c3 66 2e 0f 1f 84 00 00 00 00
RSP: 002b:00007fdb7c524c78 EFLAGS: 00000246 ORIG_RAX: 0000000000000036
RAX: ffffffffffffffda RBX: 0000000000000005 RCX: 0000000000457f29
RDX: 000000000000001a RSI: 0000000000000001 RDI: 0000000000000006
RBP: 000000000073c040 R08: 0000000000000010 R09: 0000000000000000
R10: 000000002002eff0 R11: 0000000000000246 R12: 00007fdb7c5256d4
R13: 00000000004c594f R14: 00000000004d9b88 R15: 00000000ffffffff

Uninit was created at:
No stack
==================================================================