acrn-kernel/drivers/tty/vt
Xiaomeng Tong b31c41339f vt_ioctl: fix potential spectre v1 in VT_DISALLOCATE
In VT_ACTIVATE an almost identical code path has been patched
with array_index_nospec. In the VT_DISALLOCATE path, the arg is
the user input from a system call argument and lately used as a index
for vc_cons[index].d access, which can be reached through path like
vt_disallocate->vc_busy or vt_disallocate->vc_deallocate.
For consistency both code paths should have the same mitigations
applied. Also, the code style is adjusted as suggested by Jiri.

Reviewed-by: Jiri Slaby <jirislaby@kernel.org>
Signed-off-by: Xiaomeng Tong <xiam0nd.tong@gmail.com>
Link: https://lore.kernel.org/r/20220314122921.31223-1-xiam0nd.tong@gmail.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2022-03-18 14:35:01 +01:00
..
.gitignore
Makefile
conmakehash.c
consolemap.c
cp437.uni
defkeymap.c_shipped
defkeymap.map
keyboard.c
selection.c
vc_screen.c
vt.c
vt_ioctl.c vt_ioctl: fix potential spectre v1 in VT_DISALLOCATE 2022-03-18 14:35:01 +01:00