Description: ASoC: SOF: Fix memory leak in sof_dfsentry_write
References:
 https://github.com/torvalds/linux/commit/c0a333d842ef67ac04adc72ff79dc1ccc3dca4ed
Notes:
 bwh> Introduced in 5.3 by commit 091c12e1f50c "ASoC: SOF: debug: add new
 bwh> debugfs entries for IPC flood test".  No real security impact as
 bwh> this function is only exposed through debugfs.
Bugs:
upstream: released (5.4-rc7) [c0a333d842ef67ac04adc72ff79dc1ccc3dca4ed]
4.19-upstream-stable: N/A "Vulnerable code not present"
4.9-upstream-stable: N/A "Vulnerable code not present"
3.16-upstream-stable: N/A "Vulnerable code not present"
sid: released (5.4.6-1)
4.19-buster-security: N/A "Vulnerable code not present"
4.9-stretch-security: N/A "Vulnerable code not present"
3.16-jessie-security: N/A "Vulnerable code not present"