===================================================== 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+0x305/0x2e60 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+0x305/0x2e60 lib/iov_iter.c:185 copy_to_iter include/linux/uio.h:220 [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:4144 [inline] netlink_recvmsg+0x42b/0x1580 net/netlink/af_netlink.c:1939 sock_recvmsg_nosec net/socket.c:1023 [inline] sock_recvmsg+0x2c4/0x340 net/socket.c:1045 sock_read_iter+0x32d/0x3c0 net/socket.c:1115 new_sync_read fs/read_write.c:484 [inline] vfs_read+0xc25/0xf70 fs/read_write.c:565 ksys_read+0x240/0x4b0 fs/read_write.c:708 __do_sys_read fs/read_write.c:717 [inline] __se_sys_read fs/read_write.c:715 [inline] __x64_sys_read+0x93/0xe0 fs/read_write.c:715 x64_sys_call+0x314c/0x3c30 arch/x86/include/generated/asm/syscalls_64.h:1 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+0x33a/0x1b70 net/core/skbuff.c:2193 netlink_trim+0x451/0x4c0 net/netlink/af_netlink.c:1294 netlink_broadcast_filtered+0x82/0x23b0 net/netlink/af_netlink.c:1500 nlmsg_multicast_filtered include/net/netlink.h:1128 [inline] nlmsg_multicast include/net/netlink.h:1147 [inline] nlmsg_notify+0x15f/0x2f0 net/netlink/af_netlink.c:2576 rtnl_notify+0xc3/0xf0 net/core/rtnetlink.c:952 wireless_nlevent_flush net/wireless/wext-core.c:354 [inline] wireless_nlevent_process+0xfe/0x250 net/wireless/wext-core.c:414 process_one_work kernel/workqueue.c:3238 [inline] process_scheduled_works+0xc1a/0x1e80 kernel/workqueue.c:3319 worker_thread+0xea7/0x14f0 kernel/workqueue.c:3400 kthread+0x6b9/0xef0 kernel/kthread.c:464 ret_from_fork+0x6d/0x90 arch/x86/kernel/process.c:148 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244 Uninit was stored to memory at: wireless_send_event+0x6aa/0x1490 net/wireless/wext-core.c:580 ioctl_standard_iw_point+0x12e0/0x13b0 compat_standard_call+0x17f/0x480 net/wireless/wext-core.c:1108 wext_ioctl_dispatch+0x18d/0x770 net/wireless/wext-core.c:1014 compat_wext_handle_ioctl+0x1a7/0x2f0 net/wireless/wext-core.c:1137 compat_sock_ioctl+0x265/0x1360 net/socket.c:3511 __do_compat_sys_ioctl fs/ioctl.c:1004 [inline] __se_compat_sys_ioctl+0x80f/0x1020 fs/ioctl.c:947 __ia32_compat_sys_ioctl+0x93/0xe0 fs/ioctl.c:947 ia32_sys_call+0x2226/0x4180 arch/x86/include/generated/asm/syscalls_32.h:55 do_syscall_32_irqs_on arch/x86/entry/common.c:165 [inline] __do_fast_syscall_32+0xb0/0x110 arch/x86/entry/common.c:387 do_fast_syscall_32+0x38/0x80 arch/x86/entry/common.c:412 do_SYSENTER_32+0x1f/0x30 arch/x86/entry/common.c:450 entry_SYSENTER_compat_after_hwframe+0x84/0x8e Local variable iwp created at: compat_standard_call+0x49/0x480 net/wireless/wext-core.c:1095 wext_ioctl_dispatch+0x18d/0x770 net/wireless/wext-core.c:1014 Bytes 60-63 of 64 are uninitialized Memory access of size 64 starts at ffff88805c249080 Data copied to user address 00007ffdf1193e68 CPU: 1 UID: 101 PID: 5436 Comm: dhcpcd Not tainted 6.14.0-rc5-syzkaller-00234-gb7c90e3e717a #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2025 =====================================================