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exofs: Cap on the memcpy() size 

This data comes from the device, so probably it's fairly trustworthy but
it makes the static checkers happy if we check it.

[Boaz]
  the system_id_len is zero, if not present, or always OSD_SYSTEMID_LEN.
  So always copy OSD_SYSTEMID_LEN bytes.

Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Boaz Harrosh <bharrosh@panasas.com>
This commit is contained in:
Dan Carpenter 2012-01-30 10:59:49 +03:00 committed by Boaz Harrosh
parent 3e57638bb1
commit 72749a270b
1 changed files with 2 additions and 1 deletions
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3
fs/exofs/super.c
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@ -529,7 +529,8 @@ static int exofs_devs_2_odi(struct exofs_dt_device_info *dt_dev,
struct osd_dev_info *odi) struct osd_dev_info *odi)
{ {
odi->systemid_len = le32_to_cpu(dt_dev->systemid_len); odi->systemid_len = le32_to_cpu(dt_dev->systemid_len);
memcpy(odi->systemid, dt_dev->systemid, odi->systemid_len); if (likely(odi->systemid_len))
memcpy(odi->systemid, dt_dev->systemid, OSD_SYSTEMID_LEN);
odi->osdname_len = le32_to_cpu(dt_dev->osdname_len); odi->osdname_len = le32_to_cpu(dt_dev->osdname_len);
odi->osdname = dt_dev->osdname; odi->osdname = dt_dev->osdname;