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| author | Xiaochen Wang <wangxiaochen0@gmail.com> | 2011-03-10 22:31:39 +0800 |
|---|---|---|
| committer | David Woodhouse <David.Woodhouse@intel.com> | 2011-03-11 14:27:10 +0000 |
| commit | 629286b9561982e90a6d49893a1c641e71b6a2a3 (patch) | |
| tree | cb32198537f69897e2640724972db9bb52c574d8 /drivers/mtd/sm_ftl.c | |
| parent | 1065cda8a1a57d0d3bfccdce1a655a84439d24e0 (diff) | |
| download | lwn-629286b9561982e90a6d49893a1c641e71b6a2a3.tar.gz lwn-629286b9561982e90a6d49893a1c641e71b6a2a3.zip | |
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.c | 18 |
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", |