From: Dan Carpenter Date: Wed, 4 Jul 2018 09:46:15 +0000 (+0300) Subject: drm/amd/display: off by one in find_irq_source_info() X-Git-Url: http://git.maquefel.me/?a=commitdiff_plain;h=5d908944c5ba4fc8d301e1332635c64c1b77d843;p=linux.git drm/amd/display: off by one in find_irq_source_info() The ->info[] array has DAL_IRQ_SOURCES_NUMBER elements so this condition should be >= instead of > or we could read one element beyond the end of the array. Fixes: 4562236b3bc0 ("drm/amd/dc: Add dc display driver (v2)") Signed-off-by: Dan Carpenter Reviewed-by: Harry Wentland Signed-off-by: Alex Deucher --- diff --git a/drivers/gpu/drm/amd/display/dc/irq/irq_service.c b/drivers/gpu/drm/amd/display/dc/irq/irq_service.c index dcdfa0f015517..604bea01fc13e 100644 --- a/drivers/gpu/drm/amd/display/dc/irq/irq_service.c +++ b/drivers/gpu/drm/amd/display/dc/irq/irq_service.c @@ -78,7 +78,7 @@ const struct irq_source_info *find_irq_source_info( struct irq_service *irq_service, enum dc_irq_source source) { - if (source > DAL_IRQ_SOURCES_NUMBER || source < DC_IRQ_SOURCE_INVALID) + if (source >= DAL_IRQ_SOURCES_NUMBER || source < DC_IRQ_SOURCE_INVALID) return NULL; return &irq_service->info[source];