===================================================== 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:756 [inline] genl_family_rcv_msg net/netlink/genetlink.c:833 [inline] genl_rcv_msg+0x1447/0x1500 net/netlink/genetlink.c:850 netlink_rcv_skb+0x3b5/0x6e0 net/netlink/af_netlink.c:2540 genl_rcv+0x3c/0x50 net/netlink/genetlink.c:861 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 net/socket.c:2565 [inline] __do_sys_sendmsg net/socket.c:2574 [inline] __se_sys_sendmsg net/socket.c:2572 [inline] __x64_sys_sendmsg+0x367/0x540 net/socket.c:2572 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x3d/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x63/0xcd Uninit was stored to memory at: tun_get_link_ksettings+0x33/0x60 drivers/net/tun.c:3538 __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:756 [inline] genl_family_rcv_msg net/netlink/genetlink.c:833 [inline] genl_rcv_msg+0x1447/0x1500 net/netlink/genetlink.c:850 netlink_rcv_skb+0x3b5/0x6e0 net/netlink/af_netlink.c:2540 genl_rcv+0x3c/0x50 net/netlink/genetlink.c:861 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 net/socket.c:2565 [inline] __do_sys_sendmsg net/socket.c:2574 [inline] __se_sys_sendmsg net/socket.c:2572 [inline] __x64_sys_sendmsg+0x367/0x540 net/socket.c:2572 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x3d/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x63/0xcd Uninit was stored to memory at: tun_set_link_ksettings+0x33/0x60 drivers/net/tun.c:3547 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 sock_do_ioctl+0x295/0x540 net/socket.c:1183 sock_ioctl+0x5ad/0xcd0 net/socket.c:1286 vfs_ioctl fs/ioctl.c:51 [inline] __do_sys_ioctl fs/ioctl.c:870 [inline] __se_sys_ioctl+0x222/0x400 fs/ioctl.c:856 __x64_sys_ioctl+0x92/0xd0 fs/ioctl.c:856 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x3d/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x63/0xcd 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: 10482 Comm: syz-executor.3 Not tainted 6.1.0-rc6-syzkaller-63553-gddce02aa9c40 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/26/2022 =====================================================