github-mirror/linux
1
0
Fork 0
mirror of https://github.com/torvalds/linux.git synced 2026-07-27 17:47:41 +02:00
Code Issues Actions Packages Projects Releases Wiki Activity Graph

ALSA: core: Mark some variables as __ro_after_init

Browse Source 
Some variables in the 'ALSA/core' are initialized only during the init
phase in the '__init' functions and never changed. So, mark them as
__ro_after_init to reduce the attack surface.

Signed-off-by: Len Bao <len.bao@gmx.us>
Link: https://patch.msgid.link/20260524162914.47764-1-len.bao@gmx.us
Signed-off-by: Takashi Iwai <tiwai@suse.de>
This commit is contained in:
Len Bao 2026-05-24 16:29:13 +00:00 committed by Takashi Iwai
parent 177be86ecc
commit 055cda1d47
5 changed files with 8 additions and 8 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

2
sound/core/hrtimer.c
View File

@ -20,7 +20,7 @@ MODULE_LICENSE("GPL");
MODULE_ALIAS("snd-timer-" __stringify(SNDRV_TIMER_GLOBAL_HRTIMER));
#define NANO_SEC 1000000000UL /* 10^9 in sec */
static unsigned int resolution;
static unsigned int resolution __ro_after_init;
struct snd_hrtimer {
struct snd_timer *timer;

4
sound/core/oss/pcm_oss.c
View File

@ -32,8 +32,8 @@
#define OSS_ALSAEMULVER _SIOR ('M', 249, int)
static int dsp_map[SNDRV_CARDS];
static int adsp_map[SNDRV_CARDS] = {[0 ... (SNDRV_CARDS-1)] = 1};
static int dsp_map[SNDRV_CARDS] __ro_after_init;
static int adsp_map[SNDRV_CARDS] __ro_after_init = {[0 ... (SNDRV_CARDS-1)] = 1};
static bool nonblock_open = 1;
MODULE_AUTHOR("Jaroslav Kysela <perex@perex.cz>, Abramo Bagnara <abramo@alsa-project.org>");

4
sound/core/rawmidi.c
View File

@ -28,8 +28,8 @@ MODULE_DESCRIPTION("Midlevel RawMidi code for ALSA.");
MODULE_LICENSE("GPL");
#ifdef CONFIG_SND_OSSEMUL
static int midi_map[SNDRV_CARDS];
static int amidi_map[SNDRV_CARDS] = {[0 ... (SNDRV_CARDS-1)] = 1};
static int midi_map[SNDRV_CARDS] __ro_after_init;
static int amidi_map[SNDRV_CARDS] __ro_after_init = {[0 ... (SNDRV_CARDS-1)] = 1};
module_param_array(midi_map, int, NULL, 0444);
MODULE_PARM_DESC(midi_map, "Raw MIDI device number assigned to 1st OSS device.");
module_param_array(amidi_map, int, NULL, 0444);

4
sound/core/seq/oss/seq_oss_init.c
View File

@ -27,8 +27,8 @@ static int maxqlen = SNDRV_SEQ_OSS_MAX_QLEN;
module_param(maxqlen, int, 0444);
MODULE_PARM_DESC(maxqlen, "maximum queue length");
static int system_client = -1; /* ALSA sequencer client number */
static int system_port = -1;
static int system_client __ro_after_init = -1; /* ALSA sequencer client number */
static int system_port __ro_after_init = -1;
static int num_clients;
static struct seq_oss_devinfo *client_table[SNDRV_SEQ_OSS_MAX_CLIENTS];

2
sound/core/seq/seq_dummy.c
View File

@ -71,7 +71,7 @@ struct snd_seq_dummy_port {
int connect;
};
static int my_client = -1;
static int my_client __ro_after_init = -1;
/*
* event input callback - just redirect events to subscribers