ALSA: opl3: fix infoleak in opl3
The stack object “info” in snd_opl3_ioctl() has a leaking problem. It has 2 padding bytes which are not initialized and leaked via “copy_to_user”. Signed-off-by: xidongwang <wangxidong_97@163.com> Cc: <stable@vger.kernel.org> Link: https://lore.kernel.org/r/1594006058-30362-1-git-send-email-wangxidong_97@163.com Signed-off-by: Takashi Iwai <tiwai@suse.de>alistair/sunxi64-5.8
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d02b105909
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ad155712bb
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@ -91,6 +91,8 @@ int snd_opl3_ioctl(struct snd_hwdep * hw, struct file *file,
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{
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{
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struct snd_dm_fm_info info;
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struct snd_dm_fm_info info;
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memset(&info, 0, sizeof(info));
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info.fm_mode = opl3->fm_mode;
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info.fm_mode = opl3->fm_mode;
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info.rhythm = opl3->rhythm;
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info.rhythm = opl3->rhythm;
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if (copy_to_user(argp, &info, sizeof(struct snd_dm_fm_info)))
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if (copy_to_user(argp, &info, sizeof(struct snd_dm_fm_info)))
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