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Tue, 17 Mar 2026 14:32:07 -0700 (PDT) From: buermarc To: ps.report@gmx.net Cc: buermarc@googlemail.com, elias.rw2@gmail.com, joel.granados@kernel.org, kees@kernel.org, linux-fsdevel@vger.kernel.org, linux-kernel@vger.kernel.org, stable@vger.kernel.org Subject: Re: [PATCH ] sysctl: fix uninitialized variable in proc_do_large_bitmap Date: Tue, 17 Mar 2026 22:32:05 +0100 Message-ID: <20260317213205.13681-1-buermarc@googlemail.com> X-Mailer: git-send-email 2.53.0 In-Reply-To: <20260315152635.4c20c6f0@pc-1> References: <20260315152635.4c20c6f0@pc-1> Precedence: bulk X-Mailing-List: stable@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit From: Marc Buerg Hello Peter, c will be overwritten by the previous proc_get_long() calls but that will not be a problem. We only check c again if we had another trailing char in either tr_a or tr_b[] = { ',', '\n', 0 }, minus '-'. If we find a first '-' we will only reach the check again after hitting a trailing char in tr_b. This ensures c must not be '-' before we might encounter a new '-'. Meaning c should not contain a problematic value in future iterations, but only in the first. I agree: checking for left, as you proposed, should be done. I'll drop setting c to zero and create a new patch which checks left. Kind Regards, Marc