tree f19586c8935eb246577a72637c12378bf10fede1
parent 24f2aaf952ee0b59f31c3a18b8b36c9e3d3c2cf5
author Steven Rostedt (VMware) <rostedt@goodmis.org> 1514336854 -0500
committer Steven Rostedt (VMware) <rostedt@goodmis.org> 1514402487 -0500

tracing: Fix possible double free on failure of allocating trace buffer

Jing Xia and Chunyan Zhang reported that on failing to allocate part of the
tracing buffer, memory is freed, but the pointers that point to them are not
initialized back to NULL, and later paths may try to free the freed memory
again. Jing and Chunyan fixed one of the locations that does this, but
missed a spot.

Link: http://lkml.kernel.org/r/20171226071253.8968-1-chunyan.zhang@spreadtrum.com

Cc: stable@vger.kernel.org
Fixes: 737223fbca3b1 ("tracing: Consolidate buffer allocation code")
Reported-by: Jing Xia <jing.xia@spreadtrum.com>
Reported-by: Chunyan Zhang <chunyan.zhang@spreadtrum.com>
Signed-off-by: Steven Rostedt (VMware) <rostedt@goodmis.org>