linux-kernel - [PATCH] powerpc/perf/hv-24x7: Update domain value check

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Message-Id: <20230825055601.360083-1-kjain@linux.ibm.com>
Date:   Fri, 25 Aug 2023 11:26:01 +0530
From:   Kajol Jain <kjain@...ux.ibm.com>
To:     mpe@...erman.id.au
Cc:     atrajeev@...ux.vnet.ibm.com, linux-kernel@...r.kernel.org,
        linux-perf-users@...r.kernel.org, maddy@...ux.ibm.com,
        disgoel@...ux.ibm.com, linuxppc-dev@...ts.ozlabs.org,
        kjain@...ux.ibm.com,
        Krishan Gopal Sarawast <krishang@...ux.vnet.ibm.com>
Subject: [PATCH] powerpc/perf/hv-24x7: Update domain value check

Valid domain value is in range 1 to HV_PERF_DOMAIN_MAX.
Current code has check for domain value greater than or
equal to HV_PERF_DOMAIN_MAX. But the check for domain value 0
is missing.
Fix this issue by adding check for domain value 0.

Fixes: ebd4a5a3ebd9 ("powerpc/perf/hv-24x7: Minor improvements")
Reported-by: Krishan Gopal Sarawast <krishang@...ux.vnet.ibm.com> 
Signed-off-by: Kajol Jain <kjain@...ux.ibm.com>
---
 arch/powerpc/perf/hv-24x7.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/arch/powerpc/perf/hv-24x7.c b/arch/powerpc/perf/hv-24x7.c
index 317175791d23..644881cc1c00 100644
--- a/arch/powerpc/perf/hv-24x7.c
+++ b/arch/powerpc/perf/hv-24x7.c
@@ -1418,7 +1418,7 @@ static int h_24x7_event_init(struct perf_event *event)
 	}
 
 	domain = event_get_domain(event);
-	if (domain >= HV_PERF_DOMAIN_MAX) {
+	if (domain  == 0 || domain >= HV_PERF_DOMAIN_MAX) {
 		pr_devel("invalid domain %d\n", domain);
 		return -EINVAL;
 	}
-- 
2.35.3