perf/core: Fix address filter parser for multiple filters

[ Upstream commit d680ff24e9e14444c63945b43a37ede7cd6958f9 ]

Reset appropriate variables in the parser loop between parsing separate
filters, so that they do not interfere with parsing the next filter.

Fixes: 375637bc524952 ("perf/core: Introduce address range filtering")
Signed-off-by: Adrian Hunter <adrian.hunter@intel.com>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Link: https://lore.kernel.org/r/20220131072453.2839535-4-adrian.hunter@intel.com
Signed-off-by: Sasha Levin <sashal@kernel.org>

diff --git a/kernel/events/core.c b/kernel/events/core.c
index b81652f..6202238 100644 (file)
--- a/kernel/events/core.c
+++ b/kernel/events/core.c
@@ -10530,8 +10530,11 @@ perf_event_parse_addr_filter(struct perf_event *event, char *fstr,
                        }
 
                        /* ready to consume more filters */
+                       kfree(filename);
+                       filename = NULL;
                        state = IF_STATE_ACTION;
                        filter = NULL;
+                       kernel = 0;
                }
        }