From 94971ba0592ca77ec99b292226a4b398763315b8 Mon Sep 17 00:00:00 2001 From: Biren Pandya Date: Wed, 8 Jul 2026 18:35:33 +0530 Subject: [PATCH] media: i2c: ov02a10: fix endpoint parsing use-after-free The ov02a10_check_hwcfg() function calls fwnode_handle_put(ep) immediately after allocating and parsing the endpoint. However, it subsequently calls fwnode_property_read_u32() using the same 'ep' handle, leading to a potential use-after-free. Additionally, reading the optional 'ovti,mipi-clock-voltage' property used to overwrite the 'ret' variable. If the property was missing, 'ret' would become negative, and this failure code would be incorrectly returned at the end of the function, causing probe to fail entirely. Fix the use-after-free by moving fwnode_property_read_u32() before the endpoint is parsed and freed. Avoid the error leak by not assigning the result of fwnode_property_read_u32() to 'ret'. Fixes: 91807efbe8ec ("media: i2c: add OV02A10 image sensor driver") Cc: stable@vger.kernel.org Signed-off-by: Biren Pandya Reviewed-by: Vladimir Zapolskiy Signed-off-by: Sakari Ailus --- drivers/media/i2c/ov02a10.c | 12 +++++------- 1 file changed, 5 insertions(+), 7 deletions(-) diff --git a/drivers/media/i2c/ov02a10.c b/drivers/media/i2c/ov02a10.c index 143dcfe10445..0150e4d296af 100644 --- a/drivers/media/i2c/ov02a10.c +++ b/drivers/media/i2c/ov02a10.c @@ -820,18 +820,16 @@ static int ov02a10_check_hwcfg(struct device *dev, struct ov02a10 *ov02a10) if (!ep) return -ENXIO; + /* Optional indication of MIPI clock voltage unit */ + if (!fwnode_property_read_u32(ep, "ovti,mipi-clock-voltage", + &clk_volt)) + ov02a10->mipi_clock_voltage = clk_volt; + ret = v4l2_fwnode_endpoint_alloc_parse(ep, &bus_cfg); fwnode_handle_put(ep); if (ret) return ret; - /* Optional indication of MIPI clock voltage unit */ - ret = fwnode_property_read_u32(ep, "ovti,mipi-clock-voltage", - &clk_volt); - - if (!ret) - ov02a10->mipi_clock_voltage = clk_volt; - for (i = 0; i < ARRAY_SIZE(link_freq_menu_items); i++) { for (j = 0; j < bus_cfg.nr_of_link_frequencies; j++) { if (link_freq_menu_items[i] ==