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BUG: KMSAN: kernel-infoleak-after-free in instrument_copy_to_user include/linux/instrumented.h:114 [inline]
BUG: KMSAN: kernel-infoleak-after-free in copy_to_user_iter lib/iov_iter.c:24 [inline]
BUG: KMSAN: kernel-infoleak-after-free in iterate_ubuf include/linux/iov_iter.h:30 [inline]
BUG: KMSAN: kernel-infoleak-after-free in iterate_and_advance2 include/linux/iov_iter.h:300 [inline]
BUG: KMSAN: kernel-infoleak-after-free in iterate_and_advance include/linux/iov_iter.h:328 [inline]
BUG: KMSAN: kernel-infoleak-after-free in _copy_to_iter+0xf0e/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:300 [inline]
 iterate_and_advance include/linux/iov_iter.h:328 [inline]
 _copy_to_iter+0xf0e/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:4132 [inline]
 netlink_recvmsg+0x4bb/0xfe0 net/netlink/af_netlink.c:1953
 sock_recvmsg_nosec net/socket.c:1017 [inline]
 sock_recvmsg+0x2dc/0x390 net/socket.c:1039
 __sys_recvfrom+0x282/0x550 net/socket.c:2230
 __do_sys_recvfrom net/socket.c:2245 [inline]
 __se_sys_recvfrom net/socket.c:2241 [inline]
 __x64_sys_recvfrom+0x130/0x200 net/socket.c:2241
 x64_sys_call+0x1f98/0x3db0 arch/x86/include/generated/asm/syscalls_64.h:46
 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

Uninit was created at:
 slab_free_hook mm/slub.c:2307 [inline]
 slab_free mm/slub.c:4643 [inline]
 kfree+0x252/0xec0 mm/slub.c:4842
 tomoyo_realpath_from_path+0x952/0x9f0 security/tomoyo/realpath.c:286
 tomoyo_get_realpath security/tomoyo/file.c:151 [inline]
 tomoyo_path_number_perm+0x1d0/0x7d0 security/tomoyo/file.c:723
 tomoyo_file_ioctl+0x3d/0x50 security/tomoyo/tomoyo.c:350
 security_file_ioctl+0x141/0x590 security/security.c:2913
 __do_sys_ioctl fs/ioctl.c:901 [inline]
 __se_sys_ioctl+0xbb/0x400 fs/ioctl.c:893
 __x64_sys_ioctl+0x97/0xe0 fs/ioctl.c:893
 x64_sys_call+0x1ebe/0x3db0 arch/x86/include/generated/asm/syscalls_64.h:17
 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 32-35 of 44 are uninitialized
Memory access of size 44 starts at ffff88804a165340
Data copied to user address 00007f4710f45010

CPU: 0 UID: 0 PID: 14881 Comm: syz.2.2367 Tainted: G        W           6.16.0-rc5-syzkaller-00121-gbc9ff192a6c9 #0 PREEMPT(none) 
Tainted: [W]=WARN
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025
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