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tracing: Reset parser->buffer to allow multiple "puts"

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trace_parser_put() simply frees the allocated parser buffer. But it does not
reset the pointer that was freed. This means that if trace_parser_put() is
called on the same parser more than once, it will corrupt the allocation
system. Setting parser->buffer to NULL after free allows it to be called
more than once without any ill effect.

Acked-by: Namhyung Kim <namhyung@kernel.org>
Signed-off-by: Steven Rostedt (VMware) <rostedt@goodmis.org>
This commit is contained in:
Steven Rostedt (VMware) 2017-02-02 17:58:18 -05:00
parent ae98d27afc
commit 0e684b6578
1 changed files with 1 additions and 0 deletions
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kernel/trace/trace.c
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@ -1193,6 +1193,7 @@ int trace_parser_get_init(struct trace_parser *parser, int size)
void trace_parser_put(struct trace_parser *parser) void trace_parser_put(struct trace_parser *parser)
{ {
kfree(parser->buffer); kfree(parser->buffer);
parser->buffer = NULL;
} }
/* /*