linux-kernel - [PATCH] uprobes: use kzalloc to allocate xol area

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Message-ID: <20240903102313.3402529-1-svens@linux.ibm.com>
Date: Tue,  3 Sep 2024 12:23:12 +0200
From: Sven Schnelle <svens@...ux.ibm.com>
To: Peter Zijlstra <peterz@...radead.org>, Ingo Molnar <mingo@...hat.com>,
        Arnaldo Carvalho de Melo <acme@...nel.org>,
        Namhyung Kim <namhyung@...nel.org>,
        Mark Rutland <mark.rutland@....com>,
        Alexander Shishkin <alexander.shishkin@...ux.intel.com>,
        Jiri Olsa <jolsa@...nel.org>, Ian Rogers <irogers@...gle.com>,
        Adrian Hunter <adrian.hunter@...el.com>,
        "Liang, Kan" <kan.liang@...ux.intel.com>,
        Masami Hiramatsu <mhiramat@...nel.org>,
        Oleg Nesterov <oleg@...hat.com>
Cc: linux-perf-users@...r.kernel.org, linux-kernel@...r.kernel.org,
        linux-trace-kernel@...r.kernel.org
Subject: [PATCH] uprobes: use kzalloc to allocate xol area

To prevent unitialized members, use kzalloc to allocate
the xol area.

Signed-off-by: Sven Schnelle <svens@...ux.ibm.com>
---
 kernel/events/uprobes.c | 3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

diff --git a/kernel/events/uprobes.c b/kernel/events/uprobes.c
index 73cc47708679..50d7949be2b1 100644
--- a/kernel/events/uprobes.c
+++ b/kernel/events/uprobes.c
@@ -1489,7 +1489,7 @@ static struct xol_area *__create_xol_area(unsigned long vaddr)
 	struct xol_area *area;
 	void *insns;
 
-	area = kmalloc(sizeof(*area), GFP_KERNEL);
+	area = kzalloc(sizeof(*area), GFP_KERNEL);
 	if (unlikely(!area))
 		goto out;
 
@@ -1499,7 +1499,6 @@ static struct xol_area *__create_xol_area(unsigned long vaddr)
 		goto free_area;
 
 	area->xol_mapping.name = "[uprobes]";
-	area->xol_mapping.fault = NULL;
 	area->xol_mapping.pages = area->pages;
 	area->pages[0] = alloc_page(GFP_HIGHUSER);
 	if (!area->pages[0])
-- 
2.43.0