=====================================================
BUG: KMSAN: uninit-value in tcp_recvmsg+0x4fa/0xb60 net/ipv4/tcp.c:2560
 tcp_recvmsg+0x4fa/0xb60 net/ipv4/tcp.c:2560
 inet_recvmsg+0x13a/0x5a0 net/ipv4/af_inet.c:850
 sock_recvmsg_nosec net/socket.c:995 [inline]
 sock_recvmsg net/socket.c:1013 [inline]
 __sys_recvfrom+0x696/0x900 net/socket.c:2176
 __compat_sys_recvfrom net/compat.c:390 [inline]
 __do_compat_sys_recvfrom net/compat.c:403 [inline]
 __se_compat_sys_recvfrom net/compat.c:399 [inline]
 __ia32_compat_sys_recvfrom+0x12a/0x1d0 net/compat.c:399
 do_syscall_32_irqs_on arch/x86/entry/common.c:112 [inline]
 __do_fast_syscall_32+0x95/0xf0 arch/x86/entry/common.c:178
 do_fast_syscall_32+0x33/0x70 arch/x86/entry/common.c:203
 do_SYSENTER_32+0x1b/0x20 arch/x86/entry/common.c:246
 entry_SYSENTER_compat_after_hwframe+0x53/0x62

Local variable msg created at:
 __sys_recvfrom+0x81/0x900 net/socket.c:2154
 __compat_sys_recvfrom net/compat.c:390 [inline]
 __do_compat_sys_recvfrom net/compat.c:403 [inline]
 __se_compat_sys_recvfrom net/compat.c:399 [inline]
 __ia32_compat_sys_recvfrom+0x12a/0x1d0 net/compat.c:399

CPU: 1 PID: 6344 Comm: syz-executor.5 Not tainted 5.19.0-rc3-syzkaller-30868-g4b28366af7d9 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
=====================================================