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C4jgt9GkDGtBp0iMk1nTW7s0Goalo5CBGbXXZccC91nVtajLLKRQE7luHa/C1IkzHE+P14yIm BS4wBL7BS24oCW2od+/9bJWdRnaoSsVYCcTGDMeHG8xSosJr2pVF9GDJtOm9WQs5q+W2CBiw7 M+Q/e9bcvA7s+Ie8ev0+xkhMoWais+2GxGSGbkR+Uocv+qVMfZF+f9SmF3oSn38LKqJnPgVr5 Xl04/SdOnEOSH2q46AxmoN1MmtilTLqBBOHjlC7bcjo5e+8x2JBJn/qMA7OCgBhGr7yAtu+8f fTS+gNdscfo0iB/LHma1zy8EP/+W7Rzm+rm7+oZ9kjh0rHhlMWRig7CoCEBpaG4WvUWx7PFfh tVZj4lBXBUlPk/LgEsrmWt9sHyqjSMt1S2ZkLXyQU3Ni+HkmKdOW5TRJoa9x7XwqJTx2jtnxi 4EhhjtZPCkJYaBW+xjVLlPN+alEOyfCChwNYhw+I4QBd/iYu2oYlN5bbLXPTL0ZWr6Asex9A0 DW47s67sxWdgkn6Q9OsruD3yeeeKzsErQsVJkp1sTHclM0YDEvAnCA1yxbkzsgznpb/4CiyGi qOEOmrMyYuwlpHYhVz3el/fPoWEl/rygtZDqJEu Content-Type: text/plain; charset="utf-8" Some variables in the 'ALSA/drivers' 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 --- sound/drivers/mpu401/mpu401.c | 2 +- sound/drivers/pcmtest.c | 4 ++-- 2 files changed, 3 insertions(+), 3 deletions(-) diff --git a/sound/drivers/mpu401/mpu401.c b/sound/drivers/mpu401/mpu401.c index d3f942408..b615a310c 100644 --- a/sound/drivers/mpu401/mpu401.c +++ b/sound/drivers/mpu401/mpu401.c @@ -46,7 +46,7 @@ module_param_array(uart_enter, bool, NULL, 0444); MODULE_PARM_DESC(uart_enter, "Issue UART_ENTER command at open."); =20 static struct platform_device *platform_devices[SNDRV_CARDS]; -static int pnp_registered; +static int pnp_registered __ro_after_init; static unsigned int snd_mpu401_devices; =20 static int snd_mpu401_create(struct device *devptr, int dev, diff --git a/sound/drivers/pcmtest.c b/sound/drivers/pcmtest.c index 7f93557b5..5d5281e4d 100644 --- a/sound/drivers/pcmtest.c +++ b/sound/drivers/pcmtest.c @@ -113,7 +113,7 @@ struct pcmtst_buf_iter { struct timer_list timer_instance; }; =20 -static struct snd_pcm_hardware snd_pcmtst_hw =3D { +static struct snd_pcm_hardware snd_pcmtst_hw __ro_after_init =3D { .info =3D (SNDRV_PCM_INFO_INTERLEAVED | SNDRV_PCM_INFO_BLOCK_TRANSFER | SNDRV_PCM_INFO_NONINTERLEAVED | @@ -137,7 +137,7 @@ struct pattern_buf { u32 len; }; =20 -static int buf_allocated; +static int buf_allocated __ro_after_init; static struct pattern_buf patt_bufs[MAX_CHANNELS_NUM]; =20 static inline void inc_buf_pos(struct pcmtst_buf_iter *v_iter, size_t by, = size_t bytes) --=20 2.43.0