In the Linux kernel, the following vulnerability has been resolved:

ALSA: compress: Fix task creation error unwind

sndcomprtasknew() allocates the driver task before validating the returned DMA buffers and reserving file descriptors. When either of those later steps fails, the core frees its task wrapper and DMA-buffer references without calling the driver's taskfree() callback. Any driver resources allocated by taskcreate() are therefore leaked.

The dual-fd allocation path also jumps to cleanup without storing the negative getunusedfdflags() result in retval. Since retval still contains the successful taskcreate() return value, TASKCREATE can incorrectly report success although the task was discarded.

Preserve the fd allocation errors and call taskfree() when failure occurs after a successful taskcreate() callback.