linux-kernel - [tip: perf/core] perf/core: Fix address filter parser for multiple filters

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Date:   Thu, 03 Feb 2022 14:33:29 -0000
From:   "tip-bot2 for Adrian Hunter" <tip-bot2@...utronix.de>
To:     linux-tip-commits@...r.kernel.org
Cc:     Adrian Hunter <adrian.hunter@...el.com>,
        "Peter Zijlstra (Intel)" <peterz@...radead.org>, x86@...nel.org,
        linux-kernel@...r.kernel.org
Subject: [tip: perf/core] perf/core: Fix address filter parser for multiple filters

The following commit has been merged into the perf/core branch of tip:

Commit-ID:     d680ff24e9e14444c63945b43a37ede7cd6958f9
Gitweb:        https://git.kernel.org/tip/d680ff24e9e14444c63945b43a37ede7cd6958f9
Author:        Adrian Hunter <adrian.hunter@...el.com>
AuthorDate:    Mon, 31 Jan 2022 09:24:51 +02:00
Committer:     Peter Zijlstra <peterz@...radead.org>
CommitterDate: Wed, 02 Feb 2022 13:11:42 +01:00

perf/core: Fix address filter parser for multiple filters

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@...el.com>
Signed-off-by: Peter Zijlstra (Intel) <peterz@...radead.org>
Link: https://lore.kernel.org/r/20220131072453.2839535-4-adrian.hunter@intel.com
---
 kernel/events/core.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/kernel/events/core.c b/kernel/events/core.c
index 76c754e..2889b82 100644
--- a/kernel/events/core.c
+++ b/kernel/events/core.c
@@ -10558,8 +10558,11 @@ 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;
 		}
 	}