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BUG: KMSAN: uninit-value in ethnl_update_u32 net/ethtool/netlink.h:81 [inline]
BUG: KMSAN: uninit-value in ethnl_update_linkmodes net/ethtool/linkmodes.c:300 [inline]
BUG: KMSAN: uninit-value in ethnl_set_linkmodes+0x1469/0x2270 net/ethtool/linkmodes.c:349
 ethnl_update_u32 net/ethtool/netlink.h:81 [inline]
 ethnl_update_linkmodes net/ethtool/linkmodes.c:300 [inline]
 ethnl_set_linkmodes+0x1469/0x2270 net/ethtool/linkmodes.c:349
 genl_family_rcv_msg_doit net/netlink/genetlink.c:731 [inline]
 genl_family_rcv_msg net/netlink/genetlink.c:808 [inline]
 genl_rcv_msg+0x1d7b/0x1e40 net/netlink/genetlink.c:825
 netlink_rcv_skb+0x3b5/0x6e0 net/netlink/af_netlink.c:2540
 genl_rcv+0x3c/0x50 net/netlink/genetlink.c:836
 netlink_unicast_kernel net/netlink/af_netlink.c:1319 [inline]
 netlink_unicast+0xf3b/0x1270 net/netlink/af_netlink.c:1345
 netlink_sendmsg+0x127d/0x1430 net/netlink/af_netlink.c:1921
 sock_sendmsg_nosec net/socket.c:714 [inline]
 sock_sendmsg net/socket.c:734 [inline]
 ____sys_sendmsg+0xa8e/0xe70 net/socket.c:2482
 ___sys_sendmsg+0x2a1/0x3f0 net/socket.c:2536
 __sys_sendmsg+0x258/0x440 net/socket.c:2565
 __compat_sys_sendmsg net/compat.c:344 [inline]
 __do_compat_sys_sendmsg net/compat.c:351 [inline]
 __se_compat_sys_sendmsg net/compat.c:348 [inline]
 __ia32_compat_sys_sendmsg+0x99/0xe0 net/compat.c:348
 do_syscall_32_irqs_on arch/x86/entry/common.c:112 [inline]
 __do_fast_syscall_32+0xa2/0x100 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+0x70/0x82

Uninit was stored to memory at:
 tun_get_link_ksettings+0x33/0x60 drivers/net/tun.c:3529
 __ethtool_get_link_ksettings+0x176/0x260 net/ethtool/ioctl.c:448
 ethnl_set_linkmodes+0x57c/0x2270 net/ethtool/linkmodes.c:343
 genl_family_rcv_msg_doit net/netlink/genetlink.c:731 [inline]
 genl_family_rcv_msg net/netlink/genetlink.c:808 [inline]
 genl_rcv_msg+0x1d7b/0x1e40 net/netlink/genetlink.c:825
 netlink_rcv_skb+0x3b5/0x6e0 net/netlink/af_netlink.c:2540
 genl_rcv+0x3c/0x50 net/netlink/genetlink.c:836
 netlink_unicast_kernel net/netlink/af_netlink.c:1319 [inline]
 netlink_unicast+0xf3b/0x1270 net/netlink/af_netlink.c:1345
 netlink_sendmsg+0x127d/0x1430 net/netlink/af_netlink.c:1921
 sock_sendmsg_nosec net/socket.c:714 [inline]
 sock_sendmsg net/socket.c:734 [inline]
 ____sys_sendmsg+0xa8e/0xe70 net/socket.c:2482
 ___sys_sendmsg+0x2a1/0x3f0 net/socket.c:2536
 __sys_sendmsg+0x258/0x440 net/socket.c:2565
 __compat_sys_sendmsg net/compat.c:344 [inline]
 __do_compat_sys_sendmsg net/compat.c:351 [inline]
 __se_compat_sys_sendmsg net/compat.c:348 [inline]
 __ia32_compat_sys_sendmsg+0x99/0xe0 net/compat.c:348
 do_syscall_32_irqs_on arch/x86/entry/common.c:112 [inline]
 __do_fast_syscall_32+0xa2/0x100 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+0x70/0x82

Uninit was stored to memory at:
 tun_set_link_ksettings+0x33/0x60 drivers/net/tun.c:3538
 ethtool_set_link_ksettings+0x5fc/0x690 net/ethtool/ioctl.c:616
 __dev_ethtool net/ethtool/ioctl.c:2985 [inline]
 dev_ethtool+0x1862/0x2600 net/ethtool/ioctl.c:3039
 dev_ioctl+0x369/0x1020 net/core/dev_ioctl.c:524
 compat_ifr_data_ioctl net/socket.c:3306 [inline]
 compat_sock_ioctl_trans net/socket.c:3334 [inline]
 compat_sock_ioctl+0xabc/0xf30 net/socket.c:3423
 __do_compat_sys_ioctl fs/ioctl.c:968 [inline]
 __se_compat_sys_ioctl+0x781/0xfa0 fs/ioctl.c:910
 __ia32_compat_sys_ioctl+0x8f/0xd0 fs/ioctl.c:910
 do_syscall_32_irqs_on arch/x86/entry/common.c:112 [inline]
 __do_fast_syscall_32+0xa2/0x100 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+0x70/0x82

Local variable link_ksettings created at:
 ethtool_set_link_ksettings+0x54/0x690 net/ethtool/ioctl.c:584
 __dev_ethtool net/ethtool/ioctl.c:2985 [inline]
 dev_ethtool+0x1862/0x2600 net/ethtool/ioctl.c:3039

CPU: 1 PID: 19554 Comm: syz-executor.0 Not tainted 6.1.0-rc2-syzkaller-61955-g4a3e741a3d6a #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/11/2022
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