===================================================== BUG: KMSAN: uninit-value in vmacache_find+0x296/0x740 mm/vmacache.c:73 CPU: 1 PID: 1803 Comm: syz-executor.0 Not tainted 5.6.0-rc7-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:118 __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:2215 do_user_addr_fault+0x612/0x1520 arch/x86/mm/fault.c:1445 do_page_fault+0x1ba/0x840 arch/x86/mm/fault.c:1559 page_fault+0x4e/0x60 arch/x86/entry/entry_64.S:1213 RIP: 0010:____sys_recvmsg+0x832/0x1240 net/socket.c:2581 Code: bd 40 ff ff ff 48 8d bd 40 ff ff ff e8 17 4b 47 f6 83 38 00 0f 85 95 04 00 00 48 85 db 0f 85 9c 04 00 00 48 c7 c3 f2 ff ff ff <45> 89 7d 00 e8 e5 67 dd f5 31 db 0f 1f 00 48 85 db 8b 85 24 ff ff RSP: 0018:ffffa2cc81a17970 EFLAGS: 00010246 RAX: ffffaacc81a17a40 RBX: fffffffffffffff2 RCX: ffffaacc81a17a40 RDX: ffffb2cc81a17a40 RSI: 0000000000000004 RDI: ffffa2cc81a17a40 RBP: ffffa2cc81a17b00 R08: 0000000000000002 R09: ffffa2cc81a17918 R10: 0000000000000004 R11: ffffffffb2fee520 R12: ffff90718805c6d0 R13: 0000000020001018 R14: 0000000000000000 R15: 0000000000000020 ___sys_recvmsg net/socket.c:2610 [inline] do_recvmmsg+0xc05/0x1eb0 net/socket.c:2700 __sys_recvmmsg+0x4ca/0x510 net/socket.c:2787 __do_compat_sys_recvmmsg_time32 net/compat.c:714 [inline] __se_compat_sys_recvmmsg_time32 net/compat.c:710 [inline] __ia32_compat_sys_recvmmsg_time32+0x167/0x1d0 net/compat.c:710 do_syscall_32_irqs_on arch/x86/entry/common.c:339 [inline] do_fast_syscall_32+0x3c7/0x6e0 arch/x86/entry/common.c:410 entry_SYSENTER_compat+0x68/0x77 arch/x86/entry/entry_64_compat.S:139 RIP: 0023:0xf7f40d99 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:00000000f5d3b0cc 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:4402 [inline] selinux_socket_getpeersec_dgram+0x386/0x6d0 security/selinux/hooks.c:5100 selinux_skb_peerlbl_sid security/selinux/hooks.c:4402 [inline] selinux_socket_getpeersec_dgram+0x386/0x6d0 security/selinux/hooks.c:5100 =====================================================