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author | Zubin Mithra <zsm@chromium.org> | 2021-08-27 08:37:35 -0700 |
---|---|---|
committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2021-09-22 11:47:46 +0200 |
commit | 5056ed2789bdefcb48983122bfbe9e66312bc931 (patch) | |
tree | 56d5a489244ecebbf7ae37e348478ed1293b7c09 /sound | |
parent | 9c62e4ae337ad450659fff72a627e3c2738c7bbe (diff) | |
download | linux-stable-5056ed2789bdefcb48983122bfbe9e66312bc931.tar.gz linux-stable-5056ed2789bdefcb48983122bfbe9e66312bc931.tar.bz2 linux-stable-5056ed2789bdefcb48983122bfbe9e66312bc931.zip |
ALSA: pcm: fix divide error in snd_pcm_lib_ioctl
commit f3eef46f0518a2b32ca1244015820c35a22cfe4a upstream.
Syzkaller reported a divide error in snd_pcm_lib_ioctl. fifo_size
is of type snd_pcm_uframes_t(unsigned long). If frame_size
is 0x100000000, the error occurs.
Fixes: a9960e6a293e ("ALSA: pcm: fix fifo_size frame calculation")
Signed-off-by: Zubin Mithra <zsm@chromium.org>
Reviewed-by: Guenter Roeck <groeck@chromium.org>
Cc: <stable@vger.kernel.org>
Link: https://lore.kernel.org/r/20210827153735.789452-1-zsm@chromium.org
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'sound')
-rw-r--r-- | sound/core/pcm_lib.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/sound/core/pcm_lib.c b/sound/core/pcm_lib.c index 56295936387c..da454eeee5c9 100644 --- a/sound/core/pcm_lib.c +++ b/sound/core/pcm_lib.c @@ -1751,7 +1751,7 @@ static int snd_pcm_lib_ioctl_fifo_size(struct snd_pcm_substream *substream, channels = params_channels(params); frame_size = snd_pcm_format_size(format, channels); if (frame_size > 0) - params->fifo_size /= (unsigned)frame_size; + params->fifo_size /= frame_size; } return 0; } |