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Sat, 18 Apr 2026 09:34:09 -0700 (PDT) Received: from localhost ([2a01:4b00:d036:ae00:e054:93f2:97bf:84c6]) by smtp.gmail.com with UTF8SMTPSA id 5b1f17b1804b1-488fb78cddcsm60829895e9.4.2026.04.18.09.34.08 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Sat, 18 Apr 2026 09:34:08 -0700 (PDT) From: luca.boccassi@gmail.com To: kexec@lists.infradead.org Cc: linux-mm@kvack.org, graf@amazon.com, rppt@kernel.org, pasha.tatashin@soleen.com, pratyush@kernel.org, brauner@kernel.org, linux-kernel@vger.kernel.org, Luca Boccassi Subject: [PATCH v8 1/6] liveupdate: reject LIVEUPDATE_IOCTL_CREATE_SESSION with invalid name length Date: Sat, 18 Apr 2026 17:28:18 +0100 Message-ID: <20260418163358.2304490-2-luca.boccassi@gmail.com> X-Mailer: git-send-email 2.47.3 In-Reply-To: <20260418163358.2304490-1-luca.boccassi@gmail.com> References: <20260418163358.2304490-1-luca.boccassi@gmail.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Rspamd-Server: rspam10 X-Stat-Signature: eww4eshwuka4m3xaes1ybymmh4pog4jo X-Rspam-User: X-Rspamd-Queue-Id: 168F8100006 X-HE-Tag: 1776530050-319847 X-HE-Meta: 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 h8UcXjbH 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 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: List-Subscribe: List-Unsubscribe: From: Luca Boccassi A session name must not be an empty string, and must not exceed the maximum size define in the uapi header, including null termination. Fixes: 0153094d03df ("liveupdate: luo_session: add sessions support") Signed-off-by: Luca Boccassi --- kernel/liveupdate/luo_session.c | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/kernel/liveupdate/luo_session.c b/kernel/liveupdate/luo_session.c index 25ae704d7787..5e316a4c5d71 100644 --- a/kernel/liveupdate/luo_session.c +++ b/kernel/liveupdate/luo_session.c @@ -382,9 +382,13 @@ static int luo_session_getfile(struct luo_session *session, struct file **filep) int luo_session_create(const char *name, struct file **filep) { + size_t len = strnlen(name, LIVEUPDATE_SESSION_NAME_LENGTH); struct luo_session *session; int err; + if (len == 0 || len > LIVEUPDATE_SESSION_NAME_LENGTH - 1) + return -EINVAL; + session = luo_session_alloc(name); if (IS_ERR(session)) return PTR_ERR(session); -- 2.47.3