From: Laurent Pinchart Date: Sun, 26 Jun 2016 11:09:31 +0000 (-0300) Subject: [media] v4l: vsp1: Protect against race conditions between get and set format X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=34e77ed84b274d20415067306b855bd87f761f5e;p=GitHub%2Fmoto-9609%2Fandroid_kernel_motorola_exynos9610.git [media] v4l: vsp1: Protect against race conditions between get and set format The subdev userspace API isn't serialized in the core, serialize access to formats and selection rectangles in the driver. Signed-off-by: Laurent Pinchart Acked-by: Niklas Söderlund Signed-off-by: Mauro Carvalho Chehab --- diff --git a/drivers/media/platform/vsp1/vsp1_bru.c b/drivers/media/platform/vsp1/vsp1_bru.c index 8268b87727a7..5ae3c8d1dcf0 100644 --- a/drivers/media/platform/vsp1/vsp1_bru.c +++ b/drivers/media/platform/vsp1/vsp1_bru.c @@ -142,10 +142,15 @@ static int bru_set_format(struct v4l2_subdev *subdev, struct vsp1_bru *bru = to_bru(subdev); struct v4l2_subdev_pad_config *config; struct v4l2_mbus_framefmt *format; + int ret = 0; + + mutex_lock(&bru->entity.lock); config = vsp1_entity_get_pad_config(&bru->entity, cfg, fmt->which); - if (!config) - return -EINVAL; + if (!config) { + ret = -EINVAL; + goto done; + } bru_try_format(bru, config, fmt->pad, &fmt->format); @@ -174,7 +179,9 @@ static int bru_set_format(struct v4l2_subdev *subdev, } } - return 0; +done: + mutex_unlock(&bru->entity.lock); + return ret; } static int bru_get_selection(struct v4l2_subdev *subdev, @@ -201,7 +208,9 @@ static int bru_get_selection(struct v4l2_subdev *subdev, if (!config) return -EINVAL; + mutex_lock(&bru->entity.lock); sel->r = *bru_get_compose(bru, config, sel->pad); + mutex_unlock(&bru->entity.lock); return 0; default: @@ -217,6 +226,7 @@ static int bru_set_selection(struct v4l2_subdev *subdev, struct v4l2_subdev_pad_config *config; struct v4l2_mbus_framefmt *format; struct v4l2_rect *compose; + int ret = 0; if (sel->pad == bru->entity.source_pad) return -EINVAL; @@ -224,9 +234,13 @@ static int bru_set_selection(struct v4l2_subdev *subdev, if (sel->target != V4L2_SEL_TGT_COMPOSE) return -EINVAL; + mutex_lock(&bru->entity.lock); + config = vsp1_entity_get_pad_config(&bru->entity, cfg, sel->which); - if (!config) - return -EINVAL; + if (!config) { + ret = -EINVAL; + goto done; + } /* The compose rectangle top left corner must be inside the output * frame. @@ -246,7 +260,9 @@ static int bru_set_selection(struct v4l2_subdev *subdev, compose = bru_get_compose(bru, config, sel->pad); *compose = sel->r; - return 0; +done: + mutex_unlock(&bru->entity.lock); + return ret; } static const struct v4l2_subdev_pad_ops bru_pad_ops = { diff --git a/drivers/media/platform/vsp1/vsp1_clu.c b/drivers/media/platform/vsp1/vsp1_clu.c index b63d2dbe5ea3..e1fd03811dda 100644 --- a/drivers/media/platform/vsp1/vsp1_clu.c +++ b/drivers/media/platform/vsp1/vsp1_clu.c @@ -148,10 +148,15 @@ static int clu_set_format(struct v4l2_subdev *subdev, struct vsp1_clu *clu = to_clu(subdev); struct v4l2_subdev_pad_config *config; struct v4l2_mbus_framefmt *format; + int ret = 0; + + mutex_lock(&clu->entity.lock); config = vsp1_entity_get_pad_config(&clu->entity, cfg, fmt->which); - if (!config) - return -EINVAL; + if (!config) { + ret = -EINVAL; + goto done; + } /* Default to YUV if the requested format is not supported. */ if (fmt->format.code != MEDIA_BUS_FMT_ARGB8888_1X32 && @@ -164,7 +169,7 @@ static int clu_set_format(struct v4l2_subdev *subdev, if (fmt->pad == CLU_PAD_SOURCE) { /* The CLU output format can't be modified. */ fmt->format = *format; - return 0; + goto done; } format->code = fmt->format.code; @@ -182,7 +187,9 @@ static int clu_set_format(struct v4l2_subdev *subdev, CLU_PAD_SOURCE); *format = fmt->format; - return 0; +done: + mutex_unlock(&clu->entity.lock); + return ret; } /* ----------------------------------------------------------------------------- diff --git a/drivers/media/platform/vsp1/vsp1_entity.c b/drivers/media/platform/vsp1/vsp1_entity.c index 4cf6cc719c00..da673495c222 100644 --- a/drivers/media/platform/vsp1/vsp1_entity.c +++ b/drivers/media/platform/vsp1/vsp1_entity.c @@ -51,6 +51,9 @@ void vsp1_entity_route_setup(struct vsp1_entity *source, * @cfg: the TRY pad configuration * @which: configuration selector (ACTIVE or TRY) * + * When called with which set to V4L2_SUBDEV_FORMAT_ACTIVE the caller must hold + * the entity lock to access the returned configuration. + * * Return the pad configuration requested by the which argument. The TRY * configuration is passed explicitly to the function through the cfg argument * and simply returned when requested. The ACTIVE configuration comes from the @@ -160,7 +163,9 @@ int vsp1_subdev_get_pad_format(struct v4l2_subdev *subdev, if (!config) return -EINVAL; + mutex_lock(&entity->lock); fmt->format = *vsp1_entity_get_pad_format(entity, config, fmt->pad); + mutex_unlock(&entity->lock); return 0; } @@ -204,8 +209,10 @@ int vsp1_subdev_enum_mbus_code(struct v4l2_subdev *subdev, if (!config) return -EINVAL; + mutex_lock(&entity->lock); format = vsp1_entity_get_pad_format(entity, config, 0); code->code = format->code; + mutex_unlock(&entity->lock); } return 0; @@ -235,6 +242,7 @@ int vsp1_subdev_enum_frame_size(struct v4l2_subdev *subdev, struct vsp1_entity *entity = to_vsp1_entity(subdev); struct v4l2_subdev_pad_config *config; struct v4l2_mbus_framefmt *format; + int ret = 0; config = vsp1_entity_get_pad_config(entity, cfg, fse->which); if (!config) @@ -242,8 +250,12 @@ int vsp1_subdev_enum_frame_size(struct v4l2_subdev *subdev, format = vsp1_entity_get_pad_format(entity, config, fse->pad); - if (fse->index || fse->code != format->code) - return -EINVAL; + mutex_lock(&entity->lock); + + if (fse->index || fse->code != format->code) { + ret = -EINVAL; + goto done; + } if (fse->pad == 0) { fse->min_width = min_width; @@ -260,7 +272,9 @@ int vsp1_subdev_enum_frame_size(struct v4l2_subdev *subdev, fse->max_height = format->height; } - return 0; +done: + mutex_unlock(&entity->lock); + return ret; } /* ----------------------------------------------------------------------------- @@ -358,6 +372,8 @@ int vsp1_entity_init(struct vsp1_device *vsp1, struct vsp1_entity *entity, if (i == ARRAY_SIZE(vsp1_routes)) return -EINVAL; + mutex_init(&entity->lock); + entity->vsp1 = vsp1; entity->source_pad = num_pads - 1; diff --git a/drivers/media/platform/vsp1/vsp1_entity.h b/drivers/media/platform/vsp1/vsp1_entity.h index b43457fd2c43..b5e4dbb1f7d4 100644 --- a/drivers/media/platform/vsp1/vsp1_entity.h +++ b/drivers/media/platform/vsp1/vsp1_entity.h @@ -14,7 +14,7 @@ #define __VSP1_ENTITY_H__ #include -#include +#include #include @@ -96,6 +96,8 @@ struct vsp1_entity { struct v4l2_subdev subdev; struct v4l2_subdev_pad_config *config; + + struct mutex lock; /* Protects the pad config */ }; static inline struct vsp1_entity *to_vsp1_entity(struct v4l2_subdev *subdev) diff --git a/drivers/media/platform/vsp1/vsp1_hsit.c b/drivers/media/platform/vsp1/vsp1_hsit.c index 6e5077beb38c..6ffbedb5c095 100644 --- a/drivers/media/platform/vsp1/vsp1_hsit.c +++ b/drivers/media/platform/vsp1/vsp1_hsit.c @@ -71,10 +71,15 @@ static int hsit_set_format(struct v4l2_subdev *subdev, struct vsp1_hsit *hsit = to_hsit(subdev); struct v4l2_subdev_pad_config *config; struct v4l2_mbus_framefmt *format; + int ret = 0; + + mutex_lock(&hsit->entity.lock); config = vsp1_entity_get_pad_config(&hsit->entity, cfg, fmt->which); - if (!config) - return -EINVAL; + if (!config) { + ret = -EINVAL; + goto done; + } format = vsp1_entity_get_pad_format(&hsit->entity, config, fmt->pad); @@ -83,7 +88,7 @@ static int hsit_set_format(struct v4l2_subdev *subdev, * modified. */ fmt->format = *format; - return 0; + goto done; } format->code = hsit->inverse ? MEDIA_BUS_FMT_AHSV8888_1X32 @@ -104,7 +109,9 @@ static int hsit_set_format(struct v4l2_subdev *subdev, format->code = hsit->inverse ? MEDIA_BUS_FMT_ARGB8888_1X32 : MEDIA_BUS_FMT_AHSV8888_1X32; - return 0; +done: + mutex_unlock(&hsit->entity.lock); + return ret; } static const struct v4l2_subdev_pad_ops hsit_pad_ops = { diff --git a/drivers/media/platform/vsp1/vsp1_lif.c b/drivers/media/platform/vsp1/vsp1_lif.c index a720063f38c5..702df863b13a 100644 --- a/drivers/media/platform/vsp1/vsp1_lif.c +++ b/drivers/media/platform/vsp1/vsp1_lif.c @@ -66,10 +66,15 @@ static int lif_set_format(struct v4l2_subdev *subdev, struct vsp1_lif *lif = to_lif(subdev); struct v4l2_subdev_pad_config *config; struct v4l2_mbus_framefmt *format; + int ret = 0; + + mutex_lock(&lif->entity.lock); config = vsp1_entity_get_pad_config(&lif->entity, cfg, fmt->which); - if (!config) - return -EINVAL; + if (!config) { + ret = -EINVAL; + goto done; + } /* Default to YUV if the requested format is not supported. */ if (fmt->format.code != MEDIA_BUS_FMT_ARGB8888_1X32 && @@ -83,7 +88,7 @@ static int lif_set_format(struct v4l2_subdev *subdev, * format. */ fmt->format = *format; - return 0; + goto done; } format->code = fmt->format.code; @@ -101,7 +106,9 @@ static int lif_set_format(struct v4l2_subdev *subdev, LIF_PAD_SOURCE); *format = fmt->format; - return 0; +done: + mutex_unlock(&lif->entity.lock); + return ret; } static const struct v4l2_subdev_pad_ops lif_pad_ops = { diff --git a/drivers/media/platform/vsp1/vsp1_lut.c b/drivers/media/platform/vsp1/vsp1_lut.c index dc31de9602ba..e1c0bb7535e4 100644 --- a/drivers/media/platform/vsp1/vsp1_lut.c +++ b/drivers/media/platform/vsp1/vsp1_lut.c @@ -124,10 +124,15 @@ static int lut_set_format(struct v4l2_subdev *subdev, struct vsp1_lut *lut = to_lut(subdev); struct v4l2_subdev_pad_config *config; struct v4l2_mbus_framefmt *format; + int ret = 0; + + mutex_lock(&lut->entity.lock); config = vsp1_entity_get_pad_config(&lut->entity, cfg, fmt->which); - if (!config) - return -EINVAL; + if (!config) { + ret = -EINVAL; + goto done; + } /* Default to YUV if the requested format is not supported. */ if (fmt->format.code != MEDIA_BUS_FMT_ARGB8888_1X32 && @@ -140,7 +145,7 @@ static int lut_set_format(struct v4l2_subdev *subdev, if (fmt->pad == LUT_PAD_SOURCE) { /* The LUT output format can't be modified. */ fmt->format = *format; - return 0; + goto done; } format->code = fmt->format.code; @@ -158,7 +163,9 @@ static int lut_set_format(struct v4l2_subdev *subdev, LUT_PAD_SOURCE); *format = fmt->format; - return 0; +done: + mutex_unlock(&lut->entity.lock); + return ret; } /* ----------------------------------------------------------------------------- diff --git a/drivers/media/platform/vsp1/vsp1_rwpf.c b/drivers/media/platform/vsp1/vsp1_rwpf.c index 8d461b375e91..8cb87e96b78b 100644 --- a/drivers/media/platform/vsp1/vsp1_rwpf.c +++ b/drivers/media/platform/vsp1/vsp1_rwpf.c @@ -67,10 +67,15 @@ static int vsp1_rwpf_set_format(struct v4l2_subdev *subdev, struct v4l2_subdev_pad_config *config; struct v4l2_mbus_framefmt *format; struct v4l2_rect *crop; + int ret = 0; + + mutex_lock(&rwpf->entity.lock); config = vsp1_entity_get_pad_config(&rwpf->entity, cfg, fmt->which); - if (!config) - return -EINVAL; + if (!config) { + ret = -EINVAL; + goto done; + } /* Default to YUV if the requested format is not supported. */ if (fmt->format.code != MEDIA_BUS_FMT_ARGB8888_1X32 && @@ -85,7 +90,7 @@ static int vsp1_rwpf_set_format(struct v4l2_subdev *subdev, */ format->code = fmt->format.code; fmt->format = *format; - return 0; + goto done; } format->code = fmt->format.code; @@ -110,7 +115,9 @@ static int vsp1_rwpf_set_format(struct v4l2_subdev *subdev, RWPF_PAD_SOURCE); *format = fmt->format; - return 0; +done: + mutex_unlock(&rwpf->entity.lock); + return ret; } static int vsp1_rwpf_get_selection(struct v4l2_subdev *subdev, @@ -120,14 +127,19 @@ static int vsp1_rwpf_get_selection(struct v4l2_subdev *subdev, struct vsp1_rwpf *rwpf = to_rwpf(subdev); struct v4l2_subdev_pad_config *config; struct v4l2_mbus_framefmt *format; + int ret = 0; /* Cropping is implemented on the sink pad. */ if (sel->pad != RWPF_PAD_SINK) return -EINVAL; + mutex_lock(&rwpf->entity.lock); + config = vsp1_entity_get_pad_config(&rwpf->entity, cfg, sel->which); - if (!config) - return -EINVAL; + if (!config) { + ret = -EINVAL; + goto done; + } switch (sel->target) { case V4L2_SEL_TGT_CROP: @@ -144,10 +156,13 @@ static int vsp1_rwpf_get_selection(struct v4l2_subdev *subdev, break; default: - return -EINVAL; + ret = -EINVAL; + break; } - return 0; +done: + mutex_unlock(&rwpf->entity.lock); + return ret; } static int vsp1_rwpf_set_selection(struct v4l2_subdev *subdev, @@ -158,6 +173,7 @@ static int vsp1_rwpf_set_selection(struct v4l2_subdev *subdev, struct v4l2_subdev_pad_config *config; struct v4l2_mbus_framefmt *format; struct v4l2_rect *crop; + int ret = 0; /* Cropping is implemented on the sink pad. */ if (sel->pad != RWPF_PAD_SINK) @@ -166,9 +182,13 @@ static int vsp1_rwpf_set_selection(struct v4l2_subdev *subdev, if (sel->target != V4L2_SEL_TGT_CROP) return -EINVAL; + mutex_lock(&rwpf->entity.lock); + config = vsp1_entity_get_pad_config(&rwpf->entity, cfg, sel->which); - if (!config) - return -EINVAL; + if (!config) { + ret = -EINVAL; + goto done; + } /* Make sure the crop rectangle is entirely contained in the image. The * WPF top and left offsets are limited to 255. @@ -206,7 +226,9 @@ static int vsp1_rwpf_set_selection(struct v4l2_subdev *subdev, format->width = crop->width; format->height = crop->height; - return 0; +done: + mutex_unlock(&rwpf->entity.lock); + return ret; } const struct v4l2_subdev_pad_ops vsp1_rwpf_pad_ops = { diff --git a/drivers/media/platform/vsp1/vsp1_sru.c b/drivers/media/platform/vsp1/vsp1_sru.c index 47f5e0cea2ce..6e13cdfa5ed4 100644 --- a/drivers/media/platform/vsp1/vsp1_sru.c +++ b/drivers/media/platform/vsp1/vsp1_sru.c @@ -128,6 +128,7 @@ static int sru_enum_frame_size(struct v4l2_subdev *subdev, struct vsp1_sru *sru = to_sru(subdev); struct v4l2_subdev_pad_config *config; struct v4l2_mbus_framefmt *format; + int ret = 0; config = vsp1_entity_get_pad_config(&sru->entity, cfg, fse->which); if (!config) @@ -135,8 +136,12 @@ static int sru_enum_frame_size(struct v4l2_subdev *subdev, format = vsp1_entity_get_pad_format(&sru->entity, config, SRU_PAD_SINK); - if (fse->index || fse->code != format->code) - return -EINVAL; + mutex_lock(&sru->entity.lock); + + if (fse->index || fse->code != format->code) { + ret = -EINVAL; + goto done; + } if (fse->pad == SRU_PAD_SINK) { fse->min_width = SRU_MIN_SIZE; @@ -156,7 +161,9 @@ static int sru_enum_frame_size(struct v4l2_subdev *subdev, } } - return 0; +done: + mutex_unlock(&sru->entity.lock); + return ret; } static void sru_try_format(struct vsp1_sru *sru, @@ -217,10 +224,15 @@ static int sru_set_format(struct v4l2_subdev *subdev, struct vsp1_sru *sru = to_sru(subdev); struct v4l2_subdev_pad_config *config; struct v4l2_mbus_framefmt *format; + int ret = 0; + + mutex_lock(&sru->entity.lock); config = vsp1_entity_get_pad_config(&sru->entity, cfg, fmt->which); - if (!config) - return -EINVAL; + if (!config) { + ret = -EINVAL; + goto done; + } sru_try_format(sru, config, fmt->pad, &fmt->format); @@ -236,7 +248,9 @@ static int sru_set_format(struct v4l2_subdev *subdev, sru_try_format(sru, config, SRU_PAD_SOURCE, format); } - return 0; +done: + mutex_unlock(&sru->entity.lock); + return ret; } static const struct v4l2_subdev_pad_ops sru_pad_ops = { diff --git a/drivers/media/platform/vsp1/vsp1_uds.c b/drivers/media/platform/vsp1/vsp1_uds.c index 652dcd895022..a8fc893a31ee 100644 --- a/drivers/media/platform/vsp1/vsp1_uds.c +++ b/drivers/media/platform/vsp1/vsp1_uds.c @@ -133,6 +133,7 @@ static int uds_enum_frame_size(struct v4l2_subdev *subdev, struct vsp1_uds *uds = to_uds(subdev); struct v4l2_subdev_pad_config *config; struct v4l2_mbus_framefmt *format; + int ret = 0; config = vsp1_entity_get_pad_config(&uds->entity, cfg, fse->which); if (!config) @@ -141,8 +142,12 @@ static int uds_enum_frame_size(struct v4l2_subdev *subdev, format = vsp1_entity_get_pad_format(&uds->entity, config, UDS_PAD_SINK); - if (fse->index || fse->code != format->code) - return -EINVAL; + mutex_lock(&uds->entity.lock); + + if (fse->index || fse->code != format->code) { + ret = -EINVAL; + goto done; + } if (fse->pad == UDS_PAD_SINK) { fse->min_width = UDS_MIN_SIZE; @@ -156,7 +161,9 @@ static int uds_enum_frame_size(struct v4l2_subdev *subdev, &fse->max_height); } - return 0; +done: + mutex_unlock(&uds->entity.lock); + return ret; } static void uds_try_format(struct vsp1_uds *uds, @@ -202,10 +209,15 @@ static int uds_set_format(struct v4l2_subdev *subdev, struct vsp1_uds *uds = to_uds(subdev); struct v4l2_subdev_pad_config *config; struct v4l2_mbus_framefmt *format; + int ret = 0; + + mutex_lock(&uds->entity.lock); config = vsp1_entity_get_pad_config(&uds->entity, cfg, fmt->which); - if (!config) - return -EINVAL; + if (!config) { + ret = -EINVAL; + goto done; + } uds_try_format(uds, config, fmt->pad, &fmt->format); @@ -221,7 +233,9 @@ static int uds_set_format(struct v4l2_subdev *subdev, uds_try_format(uds, config, UDS_PAD_SOURCE, format); } - return 0; +done: + mutex_unlock(&uds->entity.lock); + return ret; } /* -----------------------------------------------------------------------------