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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:30 [inline]
BUG: KMSAN: kernel-infoleak in iterate_and_advance2 include/linux/iov_iter.h:302 [inline]
BUG: KMSAN: kernel-infoleak in iterate_and_advance include/linux/iov_iter.h:330 [inline]
BUG: KMSAN: kernel-infoleak in _copy_to_iter+0xef3/0x33f0 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:302 [inline]
 iterate_and_advance include/linux/iov_iter.h:330 [inline]
 _copy_to_iter+0xef3/0x33f0 lib/iov_iter.c:185
 copy_to_iter include/linux/uio.h:220 [inline]
 simple_copy_to_iter net/core/datagram.c:521 [inline]
 __skb_datagram_iter+0x196/0x12c0 net/core/datagram.c:402
 skb_copy_datagram_iter+0x5b/0x1e0 net/core/datagram.c:535
 skb_copy_datagram_msg include/linux/skbuff.h:4167 [inline]
 pfkey_recvmsg+0x31e/0xa40 net/key/af_key.c:3733
 sock_recvmsg_nosec net/socket.c:1065 [inline]
 sock_recvmsg+0x2df/0x390 net/socket.c:1087
 sock_read_iter+0x2c8/0x360 net/socket.c:1157
 io_iter_do_read io_uring/rw.c:828 [inline]
 __io_read+0xbe6/0x24a0 io_uring/rw.c:941
 io_read+0x3e/0x100 io_uring/rw.c:1020
 __io_issue_sqe+0x2b8/0x790 io_uring/io_uring.c:1773
 io_issue_sqe+0xae/0x19b0 io_uring/io_uring.c:1796
 io_queue_sqe io_uring/io_uring.c:2025 [inline]
 io_req_task_submit+0xe5/0x1c0 io_uring/io_uring.c:1415
 io_poll_task_func+0x1166/0x17a0 io_uring/poll.c:352
 io_handle_tw_list+0x224/0x5d0 io_uring/io_uring.c:1102
 tctx_task_work_run+0xfc/0x3b0 io_uring/io_uring.c:1167
 tctx_task_work+0x6d/0xc0 io_uring/io_uring.c:1185
 task_work_run+0x206/0x2b0 kernel/task_work.c:227
 get_signal+0x139/0x2a20 kernel/signal.c:2807
 arch_do_signal_or_restart+0x53/0xbf0 arch/x86/kernel/signal.c:337
 exit_to_user_mode_loop+0xec/0x330 kernel/entry/common.c:40
 exit_to_user_mode_prepare include/linux/irq-entry-common.h:225 [inline]
 syscall_exit_to_user_mode_work include/linux/entry-common.h:175 [inline]
 syscall_exit_to_user_mode include/linux/entry-common.h:210 [inline]
 do_syscall_64+0x1e3/0x210 arch/x86/entry/syscall_64.c:100
 entry_SYSCALL_64_after_hwframe+0x77/0x7f

Uninit was created at:
 slab_post_alloc_hook mm/slub.c:4197 [inline]
 slab_alloc_node mm/slub.c:4240 [inline]
 kmem_cache_alloc_node_noprof+0x818/0xf00 mm/slub.c:4292
 kmalloc_reserve+0x13c/0x4b0 net/core/skbuff.c:578
 __alloc_skb+0x347/0x7d0 net/core/skbuff.c:669
 alloc_skb include/linux/skbuff.h:1336 [inline]
 pfkey_send_acquire+0xaec/0x3110 net/key/af_key.c:3186
 km_query net/xfrm/xfrm_state.c:2767 [inline]
 xfrm_state_find+0x7e9f/0xa940 net/xfrm/xfrm_state.c:1558
 xfrm_tmpl_resolve_one net/xfrm/xfrm_policy.c:2522 [inline]
 xfrm_tmpl_resolve net/xfrm/xfrm_policy.c:2573 [inline]
 xfrm_resolve_and_create_bundle+0xabc/0x58a0 net/xfrm/xfrm_policy.c:2871
 xfrm_lookup_with_ifid+0x48c/0x3ac0 net/xfrm/xfrm_policy.c:3205
 xfrm_lookup net/xfrm/xfrm_policy.c:3336 [inline]
 xfrm_lookup_route+0x63/0x2b0 net/xfrm/xfrm_policy.c:3347
 ip_route_output_flow+0x20d/0x2b0 net/ipv4/route.c:2934
 ip_route_connect include/net/route.h:355 [inline]
 __ip4_datagram_connect+0xd0e/0x1340 net/ipv4/datagram.c:49
 __ip6_datagram_connect+0x1f4/0x14f0 net/ipv6/datagram.c:-1
 ip6_datagram_connect net/ipv6/datagram.c:279 [inline]
 ip6_datagram_connect_v6_only+0xa4/0x110 net/ipv6/datagram.c:291
 inet_dgram_connect+0x2b5/0x520 net/ipv4/af_inet.c:592
 __sys_connect_file net/socket.c:2086 [inline]
 __sys_connect+0x51a/0x680 net/socket.c:2105
 __do_sys_connect net/socket.c:2111 [inline]
 __se_sys_connect net/socket.c:2108 [inline]
 __x64_sys_connect+0x95/0x100 net/socket.c:2108
 x64_sys_call+0x3744/0x3e20 arch/x86/include/generated/asm/syscalls_64.h:43
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0xd9/0x210 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f

Bytes 52-55 of 112 are uninitialized
Memory access of size 112 starts at ffff88802f067440

CPU: 0 UID: 0 PID: 10382 Comm: syz.3.1151 Not tainted syzkaller #0 PREEMPT(none) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/12/2025
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