From 30f84a891bf6dc7ffb9c0d0f3361ca6375633ac1 Mon Sep 17 00:00:00 2001 From: Tan Xiaojun Date: Wed, 14 Oct 2015 09:49:24 +0800 Subject: [PATCH] EDAC: Use edac_debugfs_remove_recursive() debugfs_remove() is used to remove a file or a directory from the debugfs filesystem, but mci->debugfs might not empty. This can be triggered by the following sequence: 1) Enable CONFIG_EDAC_DEBUG 2) insmod an EDAC module (like i3000_edac or similar) 3) rmmod this module 4) we can see files remaining under /edac/ like "fake_inject", for example. Removing edac_core then, causes a NULL pointer dereference. Reported-by: Yun Wu (Abel) Signed-off-by: Tan Xiaojun Cc: Doug Thompson Cc: Mauro Carvalho Chehab Cc: linux-edac Link: http://lkml.kernel.org/r/1444787364-104353-1-git-send-email-tanxiaojun@huawei.com Signed-off-by: Borislav Petkov --- drivers/edac/debugfs.c | 2 +- drivers/edac/edac_mc_sysfs.c | 2 +- 2 files changed, 2 insertions(+), 2 deletions(-) diff --git a/drivers/edac/debugfs.c b/drivers/edac/debugfs.c index 4864703115cc..54d2f668cb0a 100644 --- a/drivers/edac/debugfs.c +++ b/drivers/edac/debugfs.c @@ -98,7 +98,7 @@ int edac_create_debugfs_nodes(struct mem_ctl_info *mci) mci->debugfs = parent; return 0; nomem: - debugfs_remove(mci->debugfs); + edac_debugfs_remove_recursive(mci->debugfs); return -ENOMEM; } diff --git a/drivers/edac/edac_mc_sysfs.c b/drivers/edac/edac_mc_sysfs.c index 3929391f0b92..a75acea0f674 100644 --- a/drivers/edac/edac_mc_sysfs.c +++ b/drivers/edac/edac_mc_sysfs.c @@ -976,7 +976,7 @@ void edac_remove_sysfs_mci_device(struct mem_ctl_info *mci) edac_dbg(0, "\n"); #ifdef CONFIG_EDAC_DEBUG - debugfs_remove(mci->debugfs); + edac_debugfs_remove_recursive(mci->debugfs); #endif #ifdef CONFIG_EDAC_LEGACY_SYSFS edac_delete_csrow_objects(mci);