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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:29 [inline]
BUG: KMSAN: kernel-infoleak in iterate_and_advance2 include/linux/iov_iter.h:245 [inline]
BUG: KMSAN: kernel-infoleak in iterate_and_advance include/linux/iov_iter.h:271 [inline]
BUG: KMSAN: kernel-infoleak in _copy_to_iter+0x364/0x2520 lib/iov_iter.c:186
 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:29 [inline]
 iterate_and_advance2 include/linux/iov_iter.h:245 [inline]
 iterate_and_advance include/linux/iov_iter.h:271 [inline]
 _copy_to_iter+0x364/0x2520 lib/iov_iter.c:186
 copy_to_iter include/linux/uio.h:197 [inline]
 simple_copy_to_iter+0x68/0xa0 net/core/datagram.c:532
 __skb_datagram_iter+0x123/0xdc0 net/core/datagram.c:420
 skb_copy_datagram_iter+0x5c/0x200 net/core/datagram.c:546
 skb_copy_datagram_msg include/linux/skbuff.h:3960 [inline]
 netlink_recvmsg+0x432/0x1600 net/netlink/af_netlink.c:1967
 sock_recvmsg_nosec net/socket.c:1046 [inline]
 sock_recvmsg net/socket.c:1068 [inline]
 __sys_recvfrom+0x4e9/0x7f0 net/socket.c:2242
 __do_sys_recvfrom net/socket.c:2260 [inline]
 __se_sys_recvfrom net/socket.c:2256 [inline]
 __x64_sys_recvfrom+0x126/0x1d0 net/socket.c:2256
 do_syscall_x64 arch/x86/entry/common.c:52 [inline]
 do_syscall_64+0x6d/0x140 arch/x86/entry/common.c:83
 entry_SYSCALL_64_after_hwframe+0x63/0x6b

Uninit was stored to memory at:
 pskb_expand_head+0x305/0x1a00 net/core/skbuff.c:2106
 netlink_trim+0x2c0/0x330 net/netlink/af_netlink.c:1324
 netlink_unicast+0x9f/0x1250 net/netlink/af_netlink.c:1358
 nlmsg_unicast include/net/netlink.h:1107 [inline]
 nlmsg_notify+0x21d/0x2f0 net/netlink/af_netlink.c:2596
 rtnetlink_send+0x73/0x90 net/core/rtnetlink.c:756
 tcf_add_notify net/sched/act_api.c:1971 [inline]
 tcf_action_add net/sched/act_api.c:1993 [inline]
 tc_ctl_action+0x1256/0x1880 net/sched/act_api.c:2044
 rtnetlink_rcv_msg+0x16a6/0x1840 net/core/rtnetlink.c:6558
 netlink_rcv_skb+0x371/0x650 net/netlink/af_netlink.c:2545
 rtnetlink_rcv+0x34/0x40 net/core/rtnetlink.c:6576
 netlink_unicast_kernel net/netlink/af_netlink.c:1342 [inline]
 netlink_unicast+0xf47/0x1250 net/netlink/af_netlink.c:1368
 netlink_sendmsg+0x1238/0x13d0 net/netlink/af_netlink.c:1910
 sock_sendmsg_nosec net/socket.c:730 [inline]
 __sock_sendmsg net/socket.c:745 [inline]
 ____sys_sendmsg+0x9c2/0xd60 net/socket.c:2584
 ___sys_sendmsg+0x28d/0x3c0 net/socket.c:2638
 __sys_sendmsg net/socket.c:2667 [inline]
 __do_sys_sendmsg net/socket.c:2676 [inline]
 __se_sys_sendmsg net/socket.c:2674 [inline]
 __x64_sys_sendmsg+0x307/0x490 net/socket.c:2674
 do_syscall_x64 arch/x86/entry/common.c:52 [inline]
 do_syscall_64+0x6d/0x140 arch/x86/entry/common.c:83
 entry_SYSCALL_64_after_hwframe+0x63/0x6b

Uninit was stored to memory at:
 __nla_put lib/nlattr.c:1037 [inline]
 nla_put+0x1c6/0x230 lib/nlattr.c:1095
 tcf_skbmod_dump+0x23f/0xc20 net/sched/act_skbmod.c:256
 tcf_action_dump_old net/sched/act_api.c:1159 [inline]
 tcf_action_dump_1+0x852/0x960 net/sched/act_api.c:1195
 tcf_action_dump+0x1fd/0x460 net/sched/act_api.c:1220
 tca_get_fill+0x515/0x7a0 net/sched/act_api.c:1600
 tcf_add_notify net/sched/act_api.c:1964 [inline]
 tcf_action_add net/sched/act_api.c:1993 [inline]
 tc_ctl_action+0x119d/0x1880 net/sched/act_api.c:2044
 rtnetlink_rcv_msg+0x16a6/0x1840 net/core/rtnetlink.c:6558
 netlink_rcv_skb+0x371/0x650 net/netlink/af_netlink.c:2545
 rtnetlink_rcv+0x34/0x40 net/core/rtnetlink.c:6576
 netlink_unicast_kernel net/netlink/af_netlink.c:1342 [inline]
 netlink_unicast+0xf47/0x1250 net/netlink/af_netlink.c:1368
 netlink_sendmsg+0x1238/0x13d0 net/netlink/af_netlink.c:1910
 sock_sendmsg_nosec net/socket.c:730 [inline]
 __sock_sendmsg net/socket.c:745 [inline]
 ____sys_sendmsg+0x9c2/0xd60 net/socket.c:2584
 ___sys_sendmsg+0x28d/0x3c0 net/socket.c:2638
 __sys_sendmsg net/socket.c:2667 [inline]
 __do_sys_sendmsg net/socket.c:2676 [inline]
 __se_sys_sendmsg net/socket.c:2674 [inline]
 __x64_sys_sendmsg+0x307/0x490 net/socket.c:2674
 do_syscall_x64 arch/x86/entry/common.c:52 [inline]
 do_syscall_64+0x6d/0x140 arch/x86/entry/common.c:83
 entry_SYSCALL_64_after_hwframe+0x63/0x6b

Local variable opt created at:
 tcf_skbmod_dump+0x9d/0xc20 net/sched/act_skbmod.c:244
 tcf_action_dump_old net/sched/act_api.c:1159 [inline]
 tcf_action_dump_1+0x852/0x960 net/sched/act_api.c:1195

Bytes 156-159 of 212 are uninitialized
Memory access of size 212 starts at ffff888136c9d900
Data copied to user address 00007f44497900a0

CPU: 0 PID: 6341 Comm: syz-executor.5 Not tainted 6.7.0-syzkaller-00562-g9f8413c4a66f #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 11/17/2023
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