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Fri, 06 Feb 2026 05:39:28 -0800 (PST) Received: from localhost ([196.207.164.177]) by smtp.gmail.com with ESMTPSA id 5b1f17b1804b1-48317d7a924sm192988315e9.10.2026.02.06.05.39.28 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Fri, 06 Feb 2026 05:39:28 -0800 (PST) Date: Fri, 6 Feb 2026 16:39:25 +0300 From: Dan Carpenter To: Michael Riesch Cc: linux-media@vger.kernel.org, linux-rockchip@lists.infradead.org, linux-kernel Subject: [bug report] media: rockchip: rkcif: add support for rk3568 vicap mipi capture Message-ID: Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: [ Smatch checking is paused while we raise funding. #SadFace https://lore.kernel.org/all/aTaiGSbWZ9DJaGo7@stanley.mountain/ -dan ] Hello Michael Riesch, Commit 1f2353f5a1af ("media: rockchip: rkcif: add support for rk3568 vicap mipi capture") from Nov 14, 2025 (linux-next), leads to the following Smatch static checker warning: drivers/media/platform/rockchip/rkcif/rkcif-capture-mipi.c:519 rkcif_mipi_id_get_reg() index hardmax out of bounds 'rkcif->match_data->mipi->regs_id[id]' size=4 max='4' rl='0-u32max' drivers/media/platform/rockchip/rkcif/rkcif-capture-mipi.c:519 rkcif_mipi_id_get_reg() index hardmax out of bounds 'rkcif->match_data->mipi->regs_id[id][index]' size=11 max='11' rl='0-11' drivers/media/platform/rockchip/rkcif/rkcif-capture-mipi.c 504 static inline unsigned int rkcif_mipi_id_get_reg(struct rkcif_stream *stream, 505 unsigned int index) 506 { 507 struct rkcif_device *rkcif = stream->rkcif; 508 unsigned int block, id, offset, reg; 509 510 block = stream->interface->index - RKCIF_MIPI_BASE; 511 id = stream->id; 512 513 if (WARN_ON_ONCE(block > RKCIF_MIPI_MAX - RKCIF_MIPI_BASE) || 514 WARN_ON_ONCE(id > RKCIF_ID_MAX) || 515 WARN_ON_ONCE(index > RKCIF_MIPI_ID_REGISTER_MAX)) The id and index checks should be >=. Not sure about block but I assume it's off by one as well. 516 return RKCIF_REGISTER_NOTSUPPORTED; 517 518 offset = rkcif->match_data->mipi->blocks[block].offset; --> 519 reg = rkcif->match_data->mipi->regs_id[id][index]; 520 if (reg == RKCIF_REGISTER_NOTSUPPORTED) 521 return reg; 522 523 return offset + reg; 524 } regards, dan carpenter