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BUG: KMSAN: kernel-infoleak-after-free in instrument_copy_to_user include/linux/instrumented.h:121 [inline]
BUG: KMSAN: kernel-infoleak-after-free in _copy_to_user+0xbc/0x100 lib/usercopy.c:33
 instrument_copy_to_user include/linux/instrumented.h:121 [inline]
 _copy_to_user+0xbc/0x100 lib/usercopy.c:33
 copy_to_user include/linux/uaccess.h:169 [inline]
 vcs_read+0x1ef7/0x23c0 drivers/tty/vt/vc_screen.c:456
 vfs_read+0x3a9/0x11b0 fs/read_write.c:480
 ksys_read+0x21b/0x4e0 fs/read_write.c:620
 __do_sys_read fs/read_write.c:630 [inline]
 __se_sys_read fs/read_write.c:628 [inline]
 __x64_sys_read+0x8f/0xd0 fs/read_write.c:628
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x3d/0xb0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x63/0xcd

Uninit was stored to memory at:
 vc_uniscr_copy_line+0x340/0x570 drivers/tty/vt/vt.c:565
 vcs_read_buf_uni drivers/tty/vt/vc_screen.c:265 [inline]
 vcs_read+0x102d/0x23c0 drivers/tty/vt/vc_screen.c:436
 vfs_read+0x3a9/0x11b0 fs/read_write.c:480
 ksys_read+0x21b/0x4e0 fs/read_write.c:620
 __do_sys_read fs/read_write.c:630 [inline]
 __se_sys_read fs/read_write.c:628 [inline]
 __x64_sys_read+0x8f/0xd0 fs/read_write.c:628
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x3d/0xb0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x63/0xcd

Uninit was created at:
 free_pages_prepare mm/page_alloc.c:1328 [inline]
 free_pcp_prepare+0x40/0x680 mm/page_alloc.c:1449
 free_unref_page_prepare mm/page_alloc.c:3353 [inline]
 free_unref_page+0x3e/0x3f0 mm/page_alloc.c:3448
 free_the_page mm/page_alloc.c:694 [inline]
 __free_pages+0x78/0x1c0 mm/page_alloc.c:5534
 __free_slab+0x2ab/0x690 mm/slub.c:2068
 free_slab mm/slub.c:2083 [inline]
 discard_slab+0x113/0x1a0 mm/slub.c:2089
 __slab_free+0x82d/0x8c0 mm/slub.c:3456
 do_slab_free mm/slub.c:3539 [inline]
 slab_free mm/slub.c:3552 [inline]
 kfree+0x723/0x9c0 mm/slub.c:4599
 ops_free_list net/core/net_namespace.c:176 [inline]
 cleanup_net+0x108f/0x18c0 net/core/net_namespace.c:598
 process_one_work+0xb27/0x13e0 kernel/workqueue.c:2289
 worker_thread+0x1076/0x1d60 kernel/workqueue.c:2436
 kthread+0x31b/0x430 kernel/kthread.c:376
 ret_from_fork+0x1f/0x30

Bytes 16-511 of 4096 are uninitialized
Memory access of size 4096 starts at ffff8880ac369000
Data copied to user address 0000000020002200

CPU: 1 PID: 31498 Comm: syz-executor.0 Not tainted 5.19.0-syzkaller-32655-g1b070a5d1a2c #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/22/2022
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