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| author | Willy Tarreau <w@1wt.eu> | 2018-09-08 08:12:21 +0200 |
|---|---|---|
| committer | Takashi Iwai <tiwai@suse.de> | 2018-09-10 17:18:28 +0200 |
| commit | 49434c6c575d2008c0abbc93e615019f39e01252 (patch) | |
| tree | 499e94efd9d2e885a356daa0af63dfaf1ab0a992 /sound | |
| parent | 36f3a6e02c143a7e9e4e143e416371f67bc1fae6 (diff) | |
| download | linux-0-day-49434c6c575d2008c0abbc93e615019f39e01252.tar.gz linux-0-day-49434c6c575d2008c0abbc93e615019f39e01252.tar.xz | |
ALSA: emu10k1: fix possible info leak to userspace on SNDRV_EMU10K1_IOCTL_INFO
snd_emu10k1_fx8010_ioctl(SNDRV_EMU10K1_IOCTL_INFO) allocates
memory using kmalloc() and partially fills it by calling
snd_emu10k1_fx8010_info() before returning the resulting
structure to userspace, leaving uninitialized holes. Let's
just use kzalloc() here.
BugLink: http://blog.infosectcbr.com.au/2018/09/linux-kernel-infoleaks.html
Signed-off-by: Willy Tarreau <w@1wt.eu>
Cc: Jann Horn <jannh@google.com>
Cc: <stable@vger.kernel.org>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Diffstat (limited to 'sound')
| -rw-r--r-- | sound/pci/emu10k1/emufx.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/sound/pci/emu10k1/emufx.c b/sound/pci/emu10k1/emufx.c index 90713741c2dca..6ebe817801ea9 100644 --- a/sound/pci/emu10k1/emufx.c +++ b/sound/pci/emu10k1/emufx.c @@ -2540,7 +2540,7 @@ static int snd_emu10k1_fx8010_ioctl(struct snd_hwdep * hw, struct file *file, un emu->support_tlv = 1; return put_user(SNDRV_EMU10K1_VERSION, (int __user *)argp); case SNDRV_EMU10K1_IOCTL_INFO: - info = kmalloc(sizeof(*info), GFP_KERNEL); + info = kzalloc(sizeof(*info), GFP_KERNEL); if (!info) return -ENOMEM; snd_emu10k1_fx8010_info(emu, info); |