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| author | Guido MartÃnez <guido@vanguardiasur.com.ar> | 2014-06-17 11:17:09 -0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2014-10-05 14:52:09 -0700 |
| commit | a646ad34cce11edcc4261eefab5aa4746d67abd4 (patch) | |
| tree | c9b0ad16a53d305a0f625db2789d35825f0b8ce8 /drivers | |
| parent | 636a7bc02c928da291d21eade568cdc4903be41f (diff) | |
| download | kernel-common-a646ad34cce11edcc4261eefab5aa4746d67abd4.tar.gz kernel-common-a646ad34cce11edcc4261eefab5aa4746d67abd4.tar.bz2 kernel-common-a646ad34cce11edcc4261eefab5aa4746d67abd4.zip | |
drm/tilcdc: fix double kfree
commit c9a3ad25eddfdb898114a9d73cdb4c3472d9dfca upstream.
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 MartÃnez <guido@vanguardiasur.com.ar>
Tested-by: Darren Etheridge <detheridge@ti.com>
Signed-off-by: Dave Airlie <airlied@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/gpu/drm/tilcdc/tilcdc_panel.c | 4 |
1 files changed, 1 insertions, 3 deletions
diff --git a/drivers/gpu/drm/tilcdc/tilcdc_panel.c b/drivers/gpu/drm/tilcdc/tilcdc_panel.c index 1943b2f50ca0..b085dcc54fb5 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); |