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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_list+0x17c/0xd70 mm/page_alloc.c:3485
 release_pages+0x2b49/0x2b90 mm/swap.c:980
 free_pages_and_swap_cache+0xbd/0xd0 mm/swap_state.c:325
 tlb_batch_pages_flush mm/mmu_gather.c:59 [inline]
 tlb_flush_mmu_free mm/mmu_gather.c:256 [inline]
 tlb_flush_mmu+0x85d/0xa90 mm/mmu_gather.c:263
 tlb_finish_mmu+0xfc/0x250 mm/mmu_gather.c:363
 exit_mmap+0x1d6/0x780 mm/mmap.c:3164
 __mmput+0x147/0x510 kernel/fork.c:1189
 mmput+0x76/0x80 kernel/fork.c:1210
 copy_process+0x4d6c/0x6950 kernel/fork.c:2504
 kernel_clone+0x42f/0x1120 kernel/fork.c:2657
 __do_sys_clone3 kernel/fork.c:2949 [inline]
 __se_sys_clone3 kernel/fork.c:2933 [inline]
 __x64_sys_clone3+0x61b/0x660 kernel/fork.c:2933
 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

Bytes 204-511 of 4096 are uninitialized
Memory access of size 4096 starts at ffff888097f86000
Data copied to user address 0000000020002100

CPU: 1 PID: 7663 Comm: syz-executor.3 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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