===================================================== BUG: KMSAN: kernel-infoleak in instrument_copy_to_user include/linux/instrumented.h:114 [inline] BUG: KMSAN: kernel-infoleak in copy_to_user_iter lib/iov_iter.c:24 [inline] BUG: KMSAN: kernel-infoleak in iterate_ubuf include/linux/iov_iter.h:30 [inline] BUG: KMSAN: kernel-infoleak in iterate_and_advance2 include/linux/iov_iter.h:300 [inline] BUG: KMSAN: kernel-infoleak in iterate_and_advance include/linux/iov_iter.h:328 [inline] BUG: KMSAN: kernel-infoleak in _copy_to_iter+0x2f3/0x2b30 lib/iov_iter.c:185 instrument_copy_to_user include/linux/instrumented.h:114 [inline] copy_to_user_iter lib/iov_iter.c:24 [inline] iterate_ubuf include/linux/iov_iter.h:30 [inline] iterate_and_advance2 include/linux/iov_iter.h:300 [inline] iterate_and_advance include/linux/iov_iter.h:328 [inline] _copy_to_iter+0x2f3/0x2b30 lib/iov_iter.c:185 copy_to_iter include/linux/uio.h:211 [inline] simple_copy_to_iter net/core/datagram.c:524 [inline] __skb_datagram_iter+0x18d/0x1190 net/core/datagram.c:401 skb_copy_datagram_iter+0x5c/0x200 net/core/datagram.c:538 skb_copy_datagram_msg include/linux/skbuff.h:4115 [inline] netlink_recvmsg+0x432/0x1610 net/netlink/af_netlink.c:1948 sock_recvmsg_nosec net/socket.c:1033 [inline] sock_recvmsg+0x2c4/0x340 net/socket.c:1055 __sys_recvfrom+0x29a/0x560 net/socket.c:2247 __do_sys_recvfrom net/socket.c:2262 [inline] __se_sys_recvfrom net/socket.c:2258 [inline] __x64_sys_recvfrom+0x126/0x1d0 net/socket.c:2258 x64_sys_call+0x1b96/0x3c30 arch/x86/include/generated/asm/syscalls_64.h:46 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xcd/0x1e0 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f Uninit was stored to memory at: pskb_expand_head+0x305/0x1a60 net/core/skbuff.c:2283 netlink_trim+0x2c2/0x330 net/netlink/af_netlink.c:1303 netlink_unicast+0x9f/0x1260 net/netlink/af_netlink.c:1337 nlmsg_unicast include/net/netlink.h:1161 [inline] nlmsg_notify+0x21d/0x2f0 net/netlink/af_netlink.c:2592 rtnetlink_send+0x73/0x90 net/core/rtnetlink.c:927 rtnetlink_maybe_send include/linux/rtnetlink.h:17 [inline] tcf_add_notify net/sched/act_api.c:2067 [inline] tcf_action_add net/sched/act_api.c:2090 [inline] tc_ctl_action+0x146e/0x19d0 net/sched/act_api.c:2138 rtnetlink_rcv_msg+0x12fc/0x1410 net/core/rtnetlink.c:6920 netlink_rcv_skb+0x375/0x650 net/netlink/af_netlink.c:2541 rtnetlink_rcv+0x34/0x40 net/core/rtnetlink.c:6938 netlink_unicast_kernel net/netlink/af_netlink.c:1321 [inline] netlink_unicast+0xf52/0x1260 net/netlink/af_netlink.c:1347 netlink_sendmsg+0x10da/0x11e0 net/netlink/af_netlink.c:1891 sock_sendmsg_nosec net/socket.c:711 [inline] __sock_sendmsg+0x30f/0x380 net/socket.c:726 ____sys_sendmsg+0x877/0xb60 net/socket.c:2583 ___sys_sendmsg+0x28d/0x3c0 net/socket.c:2637 __sys_sendmsg net/socket.c:2669 [inline] __do_sys_sendmsg net/socket.c:2674 [inline] __se_sys_sendmsg net/socket.c:2672 [inline] __x64_sys_sendmsg+0x212/0x3c0 net/socket.c:2672 x64_sys_call+0x2ed6/0x3c30 arch/x86/include/generated/asm/syscalls_64.h:47 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xcd/0x1e0 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f Uninit was stored to memory at: __nla_put lib/nlattr.c:1041 [inline] nla_put+0x1c6/0x230 lib/nlattr.c:1099 tcf_ife_dump+0x250/0x10b0 net/sched/act_ife.c:660 tcf_action_dump_old net/sched/act_api.c:1234 [inline] tcf_action_dump_1+0x85a/0x970 net/sched/act_api.c:540 tcf_action_dump+0x1fd/0x460 net/sched/act_api.c:1249 tca_get_fill+0x519/0x7a0 net/sched/act_api.c:1647 tcf_add_notify_msg net/sched/act_api.c:2042 [inline] tcf_add_notify net/sched/act_api.c:2061 [inline] tcf_action_add net/sched/act_api.c:2090 [inline] tc_ctl_action+0x1365/0x19d0 net/sched/act_api.c:2138 rtnetlink_rcv_msg+0x12fc/0x1410 net/core/rtnetlink.c:6920 netlink_rcv_skb+0x375/0x650 net/netlink/af_netlink.c:2541 rtnetlink_rcv+0x34/0x40 net/core/rtnetlink.c:6938 netlink_unicast_kernel net/netlink/af_netlink.c:1321 [inline] netlink_unicast+0xf52/0x1260 net/netlink/af_netlink.c:1347 netlink_sendmsg+0x10da/0x11e0 net/netlink/af_netlink.c:1891 sock_sendmsg_nosec net/socket.c:711 [inline] __sock_sendmsg+0x30f/0x380 net/socket.c:726 ____sys_sendmsg+0x877/0xb60 net/socket.c:2583 ___sys_sendmsg+0x28d/0x3c0 net/socket.c:2637 __sys_sendmsg net/socket.c:2669 [inline] __do_sys_sendmsg net/socket.c:2674 [inline] __se_sys_sendmsg net/socket.c:2672 [inline] __x64_sys_sendmsg+0x212/0x3c0 net/socket.c:2672 x64_sys_call+0x2ed6/0x3c30 arch/x86/include/generated/asm/syscalls_64.h:47 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xcd/0x1e0 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f Local variable opt created at: tcf_ife_dump+0xab/0x10b0 net/sched/act_ife.c:647 tcf_action_dump_old net/sched/act_api.c:1234 [inline] tcf_action_dump_1+0x85a/0x970 net/sched/act_api.c:540 Bytes 158-159 of 216 are uninitialized Memory access of size 216 starts at ffff888119830c80 Data copied to user address 00007f01456e6010 CPU: 1 UID: 0 PID: 12518 Comm: syz.0.1569 Not tainted 6.12.0-syzkaller-09073-g9f16d5e6f220 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024 =====================================================