Alexander E. Patrakov wrote:

On my home computer with linux-3.3.2, kmemleak found a lot of copies of this (not only from pulseaudio, but also from wine):

unreferenced object 0xffff88021afaed40 (size 16): comm "pulseaudio", pid 839, jiffies 4294711382 (age 31392.844s) hex dump (first 16 bytes): 80 3e 00 00 c0 5d 00 00 00 7d 00 00 02 00 00 00 .>...]...}...... backtrace: [<ffffffff811620d7>] create_object+0x127/0x2b0 [<ffffffff81636d81>] kmemleak_alloc+0x21/0x50 [<ffffffff81157bc3>] __kmalloc+0x103/0x1e0 [<ffffffffa02f650b>] snd_usb_pcm_open+0x3bb/0x4c0 [snd_usb_audio]

Please try this patch.

--8<---------------------------------------------------------------->8-- ALSA: usb-audio: fix rate_list memory leak

The array of sample rates is reallocated every time when opening the PCM device, but was freed only once when unplugging the device.

Reported-by: "Alexander E. Patrakov" patrakov@gmail.com Signed-off-by: Clemens Ladisch clemens@ladisch.de --- sound/usb/pcm.c | 3 +++ 1 files changed, 3 insertions(+), 0 deletions(-)

--- a/sound/usb/pcm.c +++ b/sound/usb/pcm.c @@ -783,6 +783,9 @@ static int snd_usb_pcm_check_knot(struct snd_pcm_runtime *runtime, int count = 0, needs_knot = 0; int err;

+ kfree(subs->rate_list.list); + subs->rate_list.list = NULL; + list_for_each_entry(fp, &subs->fmt_list, list) { if (fp->rates & SNDRV_PCM_RATE_CONTINUOUS) return 0;