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| author | Boaz Harrosh <bharrosh@panasas.com> | 2009-02-08 18:02:22 +0200 |
|---|---|---|
| committer | James Bottomley <James.Bottomley@HansenPartnership.com> | 2009-03-12 12:58:13 -0500 |
| commit | 97218a1499391b174ea95e05b7a40fbb73e79813 (patch) | |
| tree | 60b8cf81afce2f45300990c50a866205153dbdf7 /drivers/scsi/osd | |
| parent | c96952ed7031e7c576ecf90cf95b8ec099d5295a (diff) | |
| download | blackbird-op-linux-97218a1499391b174ea95e05b7a40fbb73e79813.tar.gz blackbird-op-linux-97218a1499391b174ea95e05b7a40fbb73e79813.zip | |
[SCSI] libosd: Fix NULL dereference BUG when target is not OSD conformant
Very old OSC's Target had a BUG in the Get/Set attributes where
it was looking in the wrong places for attribute lists length.
If used with the open-osd initiator, the initiator would dereference
a NULL pointer when retrieving system_information attributes.
Checks are added that retrieval of each attribute is successful
before accessing its value.
Signed-off-by: Boaz Harrosh <bharrosh@panasas.com>
Signed-off-by: James Bottomley <James.Bottomley@HansenPartnership.com>
Diffstat (limited to 'drivers/scsi/osd')
| -rw-r--r-- | drivers/scsi/osd/osd_initiator.c | 11 |
1 files changed, 7 insertions, 4 deletions
diff --git a/drivers/scsi/osd/osd_initiator.c b/drivers/scsi/osd/osd_initiator.c index 0bbbf271fbb0..552f58b655d1 100644 --- a/drivers/scsi/osd/osd_initiator.c +++ b/drivers/scsi/osd/osd_initiator.c @@ -131,7 +131,7 @@ static int _osd_print_system_info(struct osd_dev *od, void *caps) pFirst = get_attrs[a++].val_ptr; OSD_INFO("OSD_ATTR_RI_PRODUCT_REVISION_LEVEL [%u]\n", - get_unaligned_be32(pFirst)); + pFirst ? get_unaligned_be32(pFirst) : ~0U); pFirst = get_attrs[a++].val_ptr; OSD_INFO("OSD_ATTR_RI_PRODUCT_SERIAL_NUMBER [%s]\n", @@ -143,15 +143,18 @@ static int _osd_print_system_info(struct osd_dev *od, void *caps) pFirst = get_attrs[a++].val_ptr; OSD_INFO("OSD_ATTR_RI_TOTAL_CAPACITY [0x%llx]\n", - _LLU(get_unaligned_be64(pFirst))); + pFirst ? _LLU(get_unaligned_be64(pFirst)) : ~0ULL); pFirst = get_attrs[a++].val_ptr; OSD_INFO("OSD_ATTR_RI_USED_CAPACITY [0x%llx]\n", - _LLU(get_unaligned_be64(pFirst))); + pFirst ? _LLU(get_unaligned_be64(pFirst)) : ~0ULL); pFirst = get_attrs[a++].val_ptr; OSD_INFO("OSD_ATTR_RI_NUMBER_OF_PARTITIONS [%llu]\n", - _LLU(get_unaligned_be64(pFirst))); + pFirst ? _LLU(get_unaligned_be64(pFirst)) : ~0ULL); + + if (a >= nelem) + goto out; /* FIXME: Where are the time utilities */ pFirst = get_attrs[a++].val_ptr; |
