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Tue, 06 Jan 2026 11:45:57 -0800 (PST) Received: from localhost.localdomain ([2a01:cb18:884:6500:9aec:4fab:6437:bbcd]) by smtp.gmail.com with ESMTPSA id 5b1f17b1804b1-47d814a10b5sm20248965e9.9.2026.01.06.11.45.56 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 06 Jan 2026 11:45:57 -0800 (PST) To: ffmpeg-devel@ffmpeg.org Date: Tue, 6 Jan 2026 20:45:35 +0100 Message-ID: <20260106194536.860-1-monsterbat02@gmail.com> X-Mailer: git-send-email 2.52.0.windows.1 MIME-Version: 1.0 Message-ID-Hash: YKUKT7OH5CPPMD4Q44QNOWO3O2IX64KK X-Message-ID-Hash: YKUKT7OH5CPPMD4Q44QNOWO3O2IX64KK X-MailFrom: SRS0=0SUs=7L=gmail.com=monsterbat02@ffmpeg.org X-Mailman-Rule-Hits: nonmember-moderation X-Mailman-Rule-Misses: dmarc-mitigation; no-senders; approved; loop; banned-address; header-match-ffmpeg-devel.ffmpeg.org-0; header-match-ffmpeg-devel.ffmpeg.org-1; header-match-ffmpeg-devel.ffmpeg.org-2; header-match-ffmpeg-devel.ffmpeg.org-3; emergency; member-moderation X-Mailman-Version: 3.3.10 Precedence: list Reply-To: FFmpeg development discussions and patches Subject: [FFmpeg-devel] [PATCH v2] tools/zmqsend: fix integer overflow on 32-bit systems List-Id: FFmpeg development discussions and patches Archived-At: Archived-At: List-Archive: List-Archive: List-Help: List-Owner: List-Post: List-Subscribe: List-Unsubscribe: From: 0xBat via ffmpeg-devel Cc: 0xBat Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Archived-At: List-Archive: List-Post: Validate zmq_msg_size to prevent an integer overflow when calculating recv_buf_size (sz + 1). This ensures safe memory allocation on 32-bit architectures. --- tools/zmqsend.c | 9 ++++++++- 1 file changed, 8 insertions(+), 1 deletion(-) diff --git a/tools/zmqsend.c b/tools/zmqsend.c index dc5d426cc8..c0d5a1484d 100644 --- a/tools/zmqsend.c +++ b/tools/zmqsend.c @@ -59,6 +59,7 @@ int main(int argc, char **argv) int c; int recv_buf_size, ret = 0; void *zmq_ctx, *socket; + size_t sz; const char *bind_address = "tcp://localhost:5555"; const char *infilename = NULL; FILE *infile = NULL; @@ -149,7 +150,13 @@ int main(int argc, char **argv) goto end; } - recv_buf_size = zmq_msg_size(&msg) + 1; + sz = zmq_msg_size(&msg); + if (sz == SIZE_MAX) { + av_log(NULL, AV_LOG_ERROR, "Message too large (overflow detected)\n"); + ret = 1; + goto end; + } + recv_buf_size = sz + 1; recv_buf = av_malloc(recv_buf_size); if (!recv_buf) { av_log(NULL, AV_LOG_ERROR, -- 2.52.0.windows.1 _______________________________________________ ffmpeg-devel mailing list -- ffmpeg-devel@ffmpeg.org To unsubscribe send an email to ffmpeg-devel-leave@ffmpeg.org