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BUG: KMSAN: kernel-infoleak in instrument_copy_to_user include/linux/instrumented.h:121 [inline]
BUG: KMSAN: kernel-infoleak 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]
 __ia32_sys_read+0x8d/0xd0 fs/read_write.c:628
 do_syscall_32_irqs_on arch/x86/entry/common.c:112 [inline]
 __do_fast_syscall_32+0xa2/0x100 arch/x86/entry/common.c:178
 do_fast_syscall_32+0x33/0x70 arch/x86/entry/common.c:203
 do_SYSENTER_32+0x1b/0x20 arch/x86/entry/common.c:246
 entry_SYSENTER_compat_after_hwframe+0x70/0x82

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]
 __ia32_sys_read+0x8d/0xd0 fs/read_write.c:628
 do_syscall_32_irqs_on arch/x86/entry/common.c:112 [inline]
 __do_fast_syscall_32+0xa2/0x100 arch/x86/entry/common.c:178
 do_fast_syscall_32+0x33/0x70 arch/x86/entry/common.c:203
 do_SYSENTER_32+0x1b/0x20 arch/x86/entry/common.c:246
 entry_SYSENTER_compat_after_hwframe+0x70/0x82

Uninit was created at:
 __alloc_pages+0x9f1/0xe80 mm/page_alloc.c:5471
 __alloc_pages_bulk+0x1de1/0x24b0 mm/page_alloc.c:5396
 alloc_pages_bulk_array_mempolicy+0xc2f/0xf40 mm/mempolicy.c:2367
 vm_area_alloc_pages mm/vmalloc.c:2915 [inline]
 __vmalloc_area_node mm/vmalloc.c:3011 [inline]
 __vmalloc_node_range+0xad6/0x2700 mm/vmalloc.c:3181
 __vmalloc_node mm/vmalloc.c:3246 [inline]
 vmalloc+0x8c/0xa0 mm/vmalloc.c:3279
 vc_uniscr_alloc drivers/tty/vt/vt.c:347 [inline]
 vc_do_resize+0x6d4/0x2ba0 drivers/tty/vt/vt.c:1249
 vc_resize+0x5a/0x70 drivers/tty/vt/vt.c:1362
 vt_ioctl+0x2179/0x2c50 drivers/tty/vt/vt_ioctl.c:928
 vt_compat_ioctl+0x35f/0x880
 tty_compat_ioctl+0x559/0x910 drivers/tty/tty_io.c:2957
 __do_compat_sys_ioctl fs/ioctl.c:968 [inline]
 __se_compat_sys_ioctl+0x781/0xfa0 fs/ioctl.c:910
 __ia32_compat_sys_ioctl+0x8f/0xd0 fs/ioctl.c:910
 do_syscall_32_irqs_on arch/x86/entry/common.c:112 [inline]
 __do_fast_syscall_32+0xa2/0x100 arch/x86/entry/common.c:178
 do_fast_syscall_32+0x33/0x70 arch/x86/entry/common.c:203
 do_SYSENTER_32+0x1b/0x20 arch/x86/entry/common.c:246
 entry_SYSENTER_compat_after_hwframe+0x70/0x82

Bytes 0-3 of 32 are uninitialized
Memory access of size 32 starts at ffff88809946b000
Data copied to user address 0000000020000200

CPU: 0 PID: 21719 Comm: syz-executor.2 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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