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authorXiaochen Wang <wangxiaochen0@gmail.com>2011-03-10 22:31:39 +0800
committerDavid Woodhouse <David.Woodhouse@intel.com>2011-03-11 14:27:10 +0000
commit629286b9561982e90a6d49893a1c641e71b6a2a3 (patch)
treecb32198537f69897e2640724972db9bb52c574d8 /drivers/mtd/sm_ftl.c
parent1065cda8a1a57d0d3bfccdce1a655a84439d24e0 (diff)
downloadlinux-629286b9561982e90a6d49893a1c641e71b6a2a3.tar.bz2
mtd: sm_rtl: check kmalloc return value
Because malloc/kzalloc may fail, we should check kmalloc/kzalloc return value in sm_create_sysfs_attributes(), mtd/sm_rtl.c and do error handling. Meanwhile, we should check sm_create_sysfs_attributes return value. Signed-off-by: Xiaochen Wang <wangxiaochen0@gmail.com> Signed-off-by: Artem Bityutskiy <Artem.Bityutskiy@nokia.com> Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
Diffstat (limited to 'drivers/mtd/sm_ftl.c')
-rw-r--r--drivers/mtd/sm_ftl.c18
1 files changed, 18 insertions, 0 deletions
diff --git a/drivers/mtd/sm_ftl.c b/drivers/mtd/sm_ftl.c
index 67822cf6c025..6405a95dc5bd 100644
--- a/drivers/mtd/sm_ftl.c
+++ b/drivers/mtd/sm_ftl.c
@@ -64,12 +64,16 @@ struct attribute_group *sm_create_sysfs_attributes(struct sm_ftl *ftl)
SM_SMALL_PAGE - SM_CIS_VENDOR_OFFSET);
char *vendor = kmalloc(vendor_len, GFP_KERNEL);
+ if (!vendor)
+ goto error1;
memcpy(vendor, ftl->cis_buffer + SM_CIS_VENDOR_OFFSET, vendor_len);
vendor[vendor_len] = 0;
/* Initialize sysfs attributes */
vendor_attribute =
kzalloc(sizeof(struct sm_sysfs_attribute), GFP_KERNEL);
+ if (!vendor_attribute)
+ goto error2;
sysfs_attr_init(&vendor_attribute->dev_attr.attr);
@@ -83,12 +87,24 @@ struct attribute_group *sm_create_sysfs_attributes(struct sm_ftl *ftl)
/* Create array of pointers to the attributes */
attributes = kzalloc(sizeof(struct attribute *) * (NUM_ATTRIBUTES + 1),
GFP_KERNEL);
+ if (!attributes)
+ goto error3;
attributes[0] = &vendor_attribute->dev_attr.attr;
/* Finally create the attribute group */
attr_group = kzalloc(sizeof(struct attribute_group), GFP_KERNEL);
+ if (!attr_group)
+ goto error4;
attr_group->attrs = attributes;
return attr_group;
+error4:
+ kfree(attributes);
+error3:
+ kfree(vendor_attribute);
+error2:
+ kfree(vendor);
+error1:
+ return NULL;
}
void sm_delete_sysfs_attributes(struct sm_ftl *ftl)
@@ -1178,6 +1194,8 @@ static void sm_add_mtd(struct mtd_blktrans_ops *tr, struct mtd_info *mtd)
}
ftl->disk_attributes = sm_create_sysfs_attributes(ftl);
+ if (!ftl->disk_attributes)
+ goto error6;
trans->disk_attributes = ftl->disk_attributes;
sm_printk("Found %d MiB xD/SmartMedia FTL on mtd%d",