I found a bug in a4l_fill_desc(). If I call it on a descriptor obtained
for an unattached device, the memory allocated for the sbdata descriptor
field is corrupted in a bad way. When, after the failing a4l_fill_desc()
call, I free() it, glibc complains about an "invalid next size" for the
I'm on x86 architecture using kernel 18.104.22.168 with xenomai 2.5.1.
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