From 8e17858a8818b40d66e83de2bf3724c64eaad72d Mon Sep 17 00:00:00 2001 From: Dan Carpenter Date: Sat, 18 Feb 2017 02:20:15 +0300 Subject: [PATCH] staging: bcm2835-camera: fix error handling in init The unwinding here isn't right. We don't free gdev[0] and instead free 1 step past what was allocated. Also we can't allocate "dev" then we should unwind instead of returning directly. Fixes: 7b3ad5abf027 ("staging: Import the BCM2835 MMAL-based V4L2 camera driver.") Signed-off-by: Dan Carpenter Acked-by: walter harms Signed-off-by: Greg Kroah-Hartman --- .../media/platform/bcm2835/bcm2835-camera.c | 14 +++++++++----- 1 file changed, 9 insertions(+), 5 deletions(-) diff --git a/drivers/staging/media/platform/bcm2835/bcm2835-camera.c b/drivers/staging/media/platform/bcm2835/bcm2835-camera.c index ca15a698e018..c4dad30dd133 100644 --- a/drivers/staging/media/platform/bcm2835/bcm2835-camera.c +++ b/drivers/staging/media/platform/bcm2835/bcm2835-camera.c @@ -1901,6 +1901,7 @@ static int __init bm2835_mmal_init(void) unsigned int num_cameras; struct vchiq_mmal_instance *instance; unsigned int resolutions[MAX_BCM2835_CAMERAS][2]; + int i; ret = vchiq_mmal_init(&instance); if (ret < 0) @@ -1914,8 +1915,10 @@ static int __init bm2835_mmal_init(void) for (camera = 0; camera < num_cameras; camera++) { dev = kzalloc(sizeof(struct bm2835_mmal_dev), GFP_KERNEL); - if (!dev) - return -ENOMEM; + if (!dev) { + ret = -ENOMEM; + goto cleanup_gdev; + } dev->camera_num = camera; dev->max_width = resolutions[camera][0]; @@ -1998,9 +2001,10 @@ unreg_dev: free_dev: kfree(dev); - for ( ; camera > 0; camera--) { - bcm2835_cleanup_instance(gdev[camera]); - gdev[camera] = NULL; +cleanup_gdev: + for (i = 0; i < camera; i++) { + bcm2835_cleanup_instance(gdev[i]); + gdev[i] = NULL; } pr_info("%s: error %d while loading driver\n", BM2835_MMAL_MODULE_NAME, ret); -- 2.30.2