===================================================== BUG: KMSAN: uninit-value in vmacache_find+0x296/0x740 mm/vmacache.c:73 CPU: 1 PID: 30545 Comm: syz-executor.0 Not tainted 5.7.0-rc4-syzkaller #0 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+0x1c9/0x220 lib/dump_stack.c:118 kmsan_report+0xf7/0x1e0 mm/kmsan/kmsan_report.c:121 __msan_warning+0x58/0xa0 mm/kmsan/kmsan_instr.c:215 vmacache_find+0x296/0x740 mm/vmacache.c:73 find_vma+0x7d/0x330 mm/mmap.c:2240 do_user_addr_fault+0x63f/0x1600 arch/x86/mm/fault.c:1445 do_page_fault+0x1ba/0x840 arch/x86/mm/fault.c:1555 page_fault+0x4e/0x60 arch/x86/entry/entry_64.S:1213 RIP: 0010:____sys_recvmsg+0x7aa/0x1020 net/socket.c:2598 Code: 00 4c 0f 48 f8 45 85 f6 0f 85 65 03 00 00 4d 85 ed 4c 8b b5 18 ff ff ff 0f 85 65 03 00 00 8b 9d 3c ff ff ff 8b 85 10 ff ff ff <41> 89 07 0f 1f 00 4d 85 f6 0f 85 10 05 00 00 48 8b bd b0 fe ff ff RSP: 0018:ffffa64b021d7980 EFLAGS: 00010246 RAX: 0000000000000020 RBX: 0000000080000002 RCX: 0000000000000028 RDX: 00000000ffffffff RSI: 0000000000000004 RDI: ffffa64b021d7a48 RBP: ffffa64b021d7b00 R08: 0000000000000002 R09: ffffa64b021d7928 R10: 0000000000000004 R11: ffffffff92bfce80 R12: ffff8d34ad0b89d8 R13: 0000000000000000 R14: 0000000000000000 R15: 0000000020001018 ___sys_recvmsg net/socket.c:2627 [inline] do_recvmmsg+0xb36/0x1e00 net/socket.c:2717 __sys_recvmmsg+0x4ca/0x510 net/socket.c:2804 __do_compat_sys_recvmmsg_time32 net/compat.c:730 [inline] __se_compat_sys_recvmmsg_time32+0xfb/0x120 net/compat.c:726 __ia32_compat_sys_recvmmsg_time32+0x62/0x80 net/compat.c:726 do_syscall_32_irqs_on arch/x86/entry/common.c:339 [inline] do_fast_syscall_32+0x3bf/0x6d0 arch/x86/entry/common.c:398 entry_SYSENTER_compat+0x68/0x77 arch/x86/entry/entry_64_compat.S:139 RIP: 0023:0xf7fdddd9 Code: 90 e8 0b 00 00 00 f3 90 0f ae e8 eb f9 8d 74 26 00 89 3c 24 c3 90 90 90 90 90 90 90 90 90 90 90 90 51 52 55 89 e5 0f 34 cd 80 <5d> 5a 59 c3 90 90 90 90 eb 0d 90 90 90 90 90 90 90 90 90 90 90 90 RSP: 002b:00000000f5dd80cc EFLAGS: 00000296 ORIG_RAX: 0000000000000151 RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 0000000020000240 RDX: 00000000000002c5 RSI: 0000000000000002 RDI: 0000000000000000 RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000 R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 Local variable ----nlbl_type.i@selinux_socket_getpeersec_dgram created at: selinux_skb_peerlbl_sid security/selinux/hooks.c:4415 [inline] selinux_socket_getpeersec_dgram+0x386/0x6d0 security/selinux/hooks.c:5113 selinux_skb_peerlbl_sid security/selinux/hooks.c:4415 [inline] selinux_socket_getpeersec_dgram+0x386/0x6d0 security/selinux/hooks.c:5113 =====================================================