From: Pan Bian bianpan2016@163.com
[ Upstream commit 585fb3d93d32dbe89e718b85009f9c322cc554cd ]
In edac_create_csrow_object(), the reference to the object is not released when adding the device to the device hierarchy fails (device_add()). This may result in a memory leak.
Signed-off-by: Pan Bian bianpan2016@163.com Signed-off-by: Borislav Petkov bp@suse.de Reviewed-by: Greg Kroah-Hartman gregkh@linuxfoundation.org Cc: James Morse james.morse@arm.com Cc: Mauro Carvalho Chehab mchehab@kernel.org Cc: linux-edac linux-edac@vger.kernel.org Link: https://lkml.kernel.org/r/1555554438-103953-1-git-send-email-bianpan2016@163... Signed-off-by: Sasha Levin sashal@kernel.org --- drivers/edac/edac_mc_sysfs.c | 8 +++++++- 1 file changed, 7 insertions(+), 1 deletion(-)
diff --git a/drivers/edac/edac_mc_sysfs.c b/drivers/edac/edac_mc_sysfs.c index 3c8f19f5ac81..0c53f2d54765 100644 --- a/drivers/edac/edac_mc_sysfs.c +++ b/drivers/edac/edac_mc_sysfs.c @@ -426,6 +426,8 @@ static inline int nr_pages_per_csrow(struct csrow_info *csrow) static int edac_create_csrow_object(struct mem_ctl_info *mci, struct csrow_info *csrow, int index) { + int err; + csrow->dev.type = &csrow_attr_type; csrow->dev.bus = mci->bus; csrow->dev.groups = csrow_dev_groups; @@ -438,7 +440,11 @@ static int edac_create_csrow_object(struct mem_ctl_info *mci, edac_dbg(0, "creating (virtual) csrow node %s\n", dev_name(&csrow->dev));
- return device_add(&csrow->dev); + err = device_add(&csrow->dev); + if (err) + put_device(&csrow->dev); + + return err; }
/* Create a CSROW object under specifed edac_mc_device */