From c9a3ad25eddfdb898114a9d73cdb4c3472d9dfca Mon Sep 17 00:00:00 2001 From: =?UTF-8?q?Guido=20Mart=C3=ADnez?= Date: Tue, 17 Jun 2014 11:17:09 -0300 Subject: [PATCH] drm/tilcdc: fix double kfree MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit display_timings_release calls kfree on the display_timings object passed to it. Calling kfree after it is wrong. SLUB debug showed the following warning: ============================================================================= BUG kmalloc-64 (Tainted: G W ): Object already free ----------------------------------------------------------------------------- Disabling lock debugging due to kernel taint INFO: Allocated in of_get_display_timings+0x2c/0x214 age=601 cpu=0 pid=884 __slab_alloc.constprop.79+0x2e0/0x33c kmem_cache_alloc+0xac/0xdc of_get_display_timings+0x2c/0x214 panel_probe+0x7c/0x314 [tilcdc] platform_drv_probe+0x18/0x48 [..snip..] INFO: Freed in panel_destroy+0x18/0x3c [tilcdc] age=0 cpu=0 pid=907 __slab_free+0x34/0x330 panel_destroy+0x18/0x3c [tilcdc] tilcdc_unload+0xd0/0x118 [tilcdc] drm_dev_unregister+0x24/0x98 [..snip..] Signed-off-by: Guido Martínez Tested-by: Darren Etheridge Cc: #v3.9+ Signed-off-by: Dave Airlie --- drivers/gpu/drm/tilcdc/tilcdc_panel.c | 4 +--- 1 file changed, 1 insertion(+), 3 deletions(-) diff --git a/drivers/gpu/drm/tilcdc/tilcdc_panel.c b/drivers/gpu/drm/tilcdc/tilcdc_panel.c index f5bed331e42e..b0b9396f41a6 100644 --- a/drivers/gpu/drm/tilcdc/tilcdc_panel.c +++ b/drivers/gpu/drm/tilcdc/tilcdc_panel.c @@ -286,10 +286,8 @@ static void panel_destroy(struct tilcdc_module *mod) { struct panel_module *panel_mod = to_panel_module(mod); - if (panel_mod->timings) { + if (panel_mod->timings) display_timings_release(panel_mod->timings); - kfree(panel_mod->timings); - } tilcdc_module_cleanup(mod); kfree(panel_mod->info);