=====================================================
BUG: KMSAN: uninit-value in put_cmsg+0x534/0xbc0 net/core/scm.c:280
 put_cmsg+0x534/0xbc0 net/core/scm.c:280
 __scm_recv_common+0x2fb/0x910 net/core/scm.c:521
 scm_recv+0x55/0xe0 net/core/scm.c:535
 netlink_recvmsg+0xd45/0xfe0 net/netlink/af_netlink.c:1988
 sock_recvmsg_nosec net/socket.c:1138 [inline]
 sock_recvmsg+0x27b/0x310 net/socket.c:1160
 ____sys_recvmsg+0x193/0x620 net/socket.c:2919
 ___sys_recvmsg+0x20b/0x850 net/socket.c:2961
 __sys_recvmsg net/socket.c:2994 [inline]
 __do_sys_recvmsg net/socket.c:3000 [inline]
 __se_sys_recvmsg net/socket.c:2997 [inline]
 __x64_sys_recvmsg+0x20e/0x3d0 net/socket.c:2997
 x64_sys_call+0x35cc/0x3ea0 arch/x86/include/generated/asm/syscalls_64.h:48
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0x15d/0x3c0 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f

Local variable ucreds created at:
 __scm_recv_common+0x1bb/0x910 net/core/scm.c:515
 scm_recv+0x55/0xe0 net/core/scm.c:535

CPU: 1 UID: 0 PID: 4936 Comm: udevd Tainted: G             L      syzkaller #0 PREEMPT(lazy) 
Tainted: [L]=SOFTLOCKUP
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/09/2026
=====================================================