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4e268db747
usx2y drivers may expose the allocated pages via mmap, but it performs zero-clear only for the struct size, not aligned with the page size. This leaves out some uninitialized trailing bytes. This patch fixes the clearance to cover all memory that are exposed to user-space. Link: https://lore.kernel.org/r/20210517131545.27252-5-tiwai@suse.de Signed-off-by: Takashi Iwai <tiwai@suse.de>
94 lines
1.5 KiB
C
94 lines
1.5 KiB
C
/* SPDX-License-Identifier: GPL-2.0-or-later */
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/*
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*
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* Copyright (c) 2003 by Karsten Wiese <annabellesgarden@yahoo.de>
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*/
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enum E_IN84 {
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E_FADER_0 = 0,
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E_FADER_1,
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E_FADER_2,
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E_FADER_3,
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E_FADER_4,
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E_FADER_5,
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E_FADER_6,
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E_FADER_7,
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E_FADER_M,
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E_TRANSPORT,
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E_MODIFIER = 10,
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E_FILTER_SELECT,
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E_SELECT,
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E_MUTE,
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E_SWITCH = 15,
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E_WHEEL_GAIN,
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E_WHEEL_FREQ,
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E_WHEEL_Q,
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E_WHEEL_PAN,
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E_WHEEL = 20
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};
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#define T_RECORD 1
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#define T_PLAY 2
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#define T_STOP 4
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#define T_F_FWD 8
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#define T_REW 0x10
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#define T_SOLO 0x20
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#define T_REC 0x40
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#define T_NULL 0x80
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struct us428_ctls {
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unsigned char fader[9];
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unsigned char transport;
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unsigned char modifier;
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unsigned char filters_elect;
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unsigned char select;
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unsigned char mute;
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unsigned char unknown;
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unsigned char wswitch;
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unsigned char wheel[5];
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};
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struct us428_set_byte {
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unsigned char offset,
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value;
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};
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enum {
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ELT_VOLUME = 0,
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ELT_LIGHT
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};
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struct usx2y_volume {
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unsigned char channel,
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lh,
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ll,
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rh,
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rl;
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};
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struct us428_lights {
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struct us428_set_byte light[7];
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};
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struct us428_p4out {
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char type;
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union {
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struct usx2y_volume vol;
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struct us428_lights lights;
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} val;
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};
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#define N_US428_CTL_BUFS 16
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#define N_US428_P4OUT_BUFS 16
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struct us428ctls_sharedmem {
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struct us428_ctls ctl_snapshot[N_US428_CTL_BUFS];
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int ctl_snapshot_differs_at[N_US428_CTL_BUFS];
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int ctl_snapshot_last, ctl_snapshot_red;
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struct us428_p4out p4out[N_US428_P4OUT_BUFS];
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int p4out_last, p4out_sent;
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};
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#define US428_SHAREDMEM_PAGES PAGE_ALIGN(sizeof(struct us428ctls_sharedmem))
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