[PATCH 4.19 085/338] perf/core: Fix address filter parser for multiple filters

Greg Kroah-Hartman
2022-04-14T13:23:24Z

From: Adrian Hunter <adrian.hunter@intel.com>

[ 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>
---
kernel/events/core.c | 3 +++
1 file changed, 3 insertions(+)

diff --git a/kernel/events/core.c b/kernel/events/core.c
index 2adde229d1af..ec2f9e433208 100644
--- a/kernel/events/core.c
+++ b/kernel/events/core.c
@@ -9137,8 +9137,11 @@ 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;
}
}

--
2.34.1