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Tue, 06 Jan 2026 09:19:28 -0800 (PST) Received: from localhost.localdomain ([2401:4900:8838:65fe:636c:fbb8:d9e1:61f2]) by smtp.gmail.com with ESMTPSA id 41be03b00d2f7-c4cbfc2f481sm2875157a12.10.2026.01.06.09.19.22 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 06 Jan 2026 09:19:27 -0800 (PST) Received: (nullmailer pid 124163 invoked by uid 1000); Tue, 06 Jan 2026 17:16:29 -0000 From: Kathara Sasikumar To: alex.aring@gmail.com, horms@kernel.org Cc: davem@davemloft.net, edumazet@google.com, kuba@kernel.org, pabeni@redhat.com, linux-bluetooth@vger.kernel.org, linux-wpan@vger.kernel.org, netdev@vger.kernel.org, linux-kernel@vger.kernel.org, Kathara Sasikumar Subject: [PATCH v2 net-next] net: 6lowpan: replace sprintf() with scnprintf() in debugfs Date: Tue, 6 Jan 2026 17:16:11 +0000 Message-ID: <20260106171610.124138-2-katharasasikumar007@gmail.com> X-Mailer: git-send-email 2.51.0 Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" sprintf() does not perform bounds checking on the destination buffer. Replace it with scnprintf() to ensure the write stays within bounds. No functional change intended. Signed-off-by: Kathara Sasikumar --- v2: - Updated commit message wording - Targeted the patch to net-next --- net/6lowpan/debugfs.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/net/6lowpan/debugfs.c b/net/6lowpan/debugfs.c index 600b9563bfc5..d45ace484143 100644 --- a/net/6lowpan/debugfs.c +++ b/net/6lowpan/debugfs.c @@ -173,7 +173,7 @@ static void lowpan_dev_debugfs_ctx_init(struct net_devi= ce *dev, if (WARN_ON_ONCE(id >=3D LOWPAN_IPHC_CTX_TABLE_SIZE)) return; =20 - sprintf(buf, "%d", id); + scnprintf(buf, sizeof(buf), "%d", id); =20 root =3D debugfs_create_dir(buf, ctx); =20 --=20 2.51.0