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From: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
To: Alexei Starovoitov <ast@kernel.org>,
	bpf@vger.kernel.org,
	linux-kernel@vger.kernel.org
Cc: Daniel Borkmann <daniel@iogearbox.net>,
	John Fastabend <john.fastabend@gmail.com>,
	Andrii Nakryiko <andrii@kernel.org>,
	Martin KaFai Lau <martin.lau@linux.dev>,
	Eduard Zingerman <eddyz87@gmail.com>,
	Song Liu <song@kernel.org>,
	Yonghong Song <yonghong.song@linux.dev>,
	KP Singh <kpsingh@kernel.org>,
	Stanislav Fomichev <sdf@google.com>,
	Hao Luo <haoluo@google.com>,
	Jiri Olsa <jolsa@kernel.org>,
	Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Subject: [PATCH v1 1/1] bpf: Switch to krealloc_array()
Date: Mon, 29 Apr 2024 15:00:05 +0300
Message-ID: <20240429120005.3539116-1-andriy.shevchenko@linux.intel.com>
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Let the krealloc_array() copy the original data and
check for a multiplication overflow.

Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
---
 kernel/bpf/core.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/kernel/bpf/core.c b/kernel/bpf/core.c
index 466c2deeecff..778775bdbb2e 100644
--- a/kernel/bpf/core.c
+++ b/kernel/bpf/core.c
@@ -849,7 +849,7 @@ int bpf_jit_add_poke_descriptor(struct bpf_prog *prog,
 		return -EINVAL;
 	}
 
-	tab = krealloc(tab, size * sizeof(*poke), GFP_KERNEL);
+	tab = krealloc_array(tab, size, sizeof(*poke), GFP_KERNEL);
 	if (!tab)
 		return -ENOMEM;
 
-- 
2.43.0.rc1.1336.g36b5255a03ac