Messages in this thread Patch in this message | | | Date | Wed, 8 May 2019 13:02:50 +0200 | From | Borislav Petkov <> | Subject | [PATCH 1/2] EDAC/sysfs: Fix memory leak when creating a csrow object |
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From 28e7f23939208bea639d6cd3d492cde3f65a7e4f Mon Sep 17 00:00:00 2001 From: Pan Bian <bianpan2016@163.com> Date: Thu, 18 Apr 2019 10:27:18 +0800
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> Cc: Greg KH <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.com --- 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 464174685589..9b7d396f26e9 100644 --- a/drivers/edac/edac_mc_sysfs.c +++ b/drivers/edac/edac_mc_sysfs.c @@ -404,6 +404,8 @@ 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.groups = csrow_dev_groups; device_initialize(&csrow->dev); @@ -415,7 +417,11 @@ 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 */ -- 2.21.0
-- Regards/Gruss, Boris.
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