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authorBoaz Harrosh <bharrosh@panasas.com>2009-02-08 19:02:22 +0300
committerJames Bottomley <James.Bottomley@HansenPartnership.com>2009-03-12 20:58:13 +0300
commit97218a1499391b174ea95e05b7a40fbb73e79813 (patch)
tree60b8cf81afce2f45300990c50a866205153dbdf7 /drivers/scsi/osd
parentc96952ed7031e7c576ecf90cf95b8ec099d5295a (diff)
downloadlinux-97218a1499391b174ea95e05b7a40fbb73e79813.tar.xz
[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.c11
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;