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authorToshi Kani <toshi.kani@hpe.com>2015-09-24 13:59:27 -0600
committerBorislav Petkov <bp@suse.de>2015-09-28 16:39:05 +0200
commitd0c9c93019e9b61f21ac22a5c23749873adc0038 (patch)
treea697747506b4d36385cb5f984bc34bd1fe388151 /drivers/edac/edac_mc_sysfs.c
parent438470b84c119f4910ebf1fdd26738c8d9881b24 (diff)
downloadlinux-d0c9c93019e9b61f21ac22a5c23749873adc0038.tar.bz2
EDAC: Don't allow empty DIMM labels
Updating dimm_label to an empty string does not make much sense. Change the sysfs dimm_label store operation to fail a request when an input string is empty. Suggested-by: Borislav Petkov <bp@alien8.de> Signed-off-by: Toshi Kani <toshi.kani@hpe.com> Cc: elliott@hpe.com Cc: Mauro Carvalho Chehab <mchehab@osg.samsung.com> Cc: Tony Luck <tony.luck@intel.com> Cc: linux-edac <linux-edac@vger.kernel.org> Link: http://lkml.kernel.org/r/1443124767.25474.172.camel@hpe.com Signed-off-by: Borislav Petkov <bp@suse.de>
Diffstat (limited to 'drivers/edac/edac_mc_sysfs.c')
-rw-r--r--drivers/edac/edac_mc_sysfs.c4
1 files changed, 2 insertions, 2 deletions
diff --git a/drivers/edac/edac_mc_sysfs.c b/drivers/edac/edac_mc_sysfs.c
index bf6b6802105c..3929391f0b92 100644
--- a/drivers/edac/edac_mc_sysfs.c
+++ b/drivers/edac/edac_mc_sysfs.c
@@ -248,7 +248,7 @@ static ssize_t channel_dimm_label_store(struct device *dev,
if (data[count - 1] == '\0' || data[count - 1] == '\n')
copy_count -= 1;
- if (copy_count >= sizeof(rank->dimm->label))
+ if (copy_count == 0 || copy_count >= sizeof(rank->dimm->label))
return -EINVAL;
strncpy(rank->dimm->label, data, copy_count);
@@ -509,7 +509,7 @@ static ssize_t dimmdev_label_store(struct device *dev,
if (data[count - 1] == '\0' || data[count - 1] == '\n')
copy_count -= 1;
- if (copy_count >= sizeof(dimm->label))
+ if (copy_count == 0 || copy_count >= sizeof(dimm->label))
return -EINVAL;
strncpy(dimm->label, data, copy_count);