From: Mauro Carvalho Chehab Date: Thu, 12 Aug 2010 16:09:21 +0000 (-0300) Subject: edac_core: Don't let free(mci) happen while using it X-Git-Url: https://git.karo-electronics.de/?a=commitdiff_plain;h=ac99768c534ebde637b506ce9a6f5638d2049a5d;p=linux-beck.git edac_core: Don't let free(mci) happen while using it A very nasty bug were happening on edac core, due to the way mci objects are freed. mci memory is freed when kobject count reaches zero, by edac_mci_control_release(). However, from the logs, this is clearly happening before the final usage of mci struct: [15799.607454] EDAC DEBUG: in drivers/edac/edac_mc_sysfs.c, line at 640: edac_mci_control_release() mci instance idx=0 releasing [15799.618773] EDAC DEBUG: in drivers/edac/edac_mc_sysfs.c, line at 769: edac_inst_grp_release() [15799.627326] EDAC DEBUG: in drivers/edac/edac_mc_sysfs.c, line at 894: edac_remove_mci_instance_attributes() end of seeking for group all_channel_counts [15799.640887] EDAC DEBUG: in drivers/edac/edac_mc_sysfs.c, line at 877: edac_remove_mci_instance_attributes() sysfs_attrib = ffffffffa01d7240 [15799.653412] EDAC DEBUG: in drivers/edac/edac_mc_sysfs.c, line at 1020: edac_remove_sysfs_mci_device() remove_link [15799.663753] EDAC DEBUG: in drivers/edac/edac_mc_sysfs.c, line at 1024: edac_remove_sysfs_mci_device() remove_mci_instance Signed-off-by: Mauro Carvalho Chehab --- diff --git a/drivers/edac/edac_mc_sysfs.c b/drivers/edac/edac_mc_sysfs.c index 5a5734c1f6a5..7024b873a3b9 100644 --- a/drivers/edac/edac_mc_sysfs.c +++ b/drivers/edac/edac_mc_sysfs.c @@ -759,8 +759,6 @@ static void edac_inst_grp_release(struct kobject *kobj) grp = container_of(kobj, struct mcidev_sysfs_group_kobj, kobj); mci = grp->mci; - - kobject_put(&mci->edac_mci_kobj); } /* Intermediate show/store table */