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[SCSI] libiscsi: fix iscsi pool error path 

Memory freeing in iscsi_pool_free() looks wrong to me. Either q->pool
can be NULL and this should be tested before dereferencing it, or it
can't be NULL and it shouldn't be tested at all. As far as I can see,
the only case where q->pool is NULL is on early error in
iscsi_pool_init(). One possible way to fix the bug is thus to not
call iscsi_pool_free() in this case (nothing needs to be freed anyway)
and then we can get rid of the q->pool check.

Signed-off-by: Jean Delvare <jdelvare@suse.de>
Signed-off-by: Mike Christie <michaelc@cs.wisc.edu>
Signed-off-by: James Bottomley <James.Bottomley@HansenPartnership.com>
This commit is contained in:
Jean Delvare 2009-03-05 14:45:55 -06:00 committed by James Bottomley
parent 07c00ec449
commit f474a37bc4
1 changed files with 2 additions and 3 deletions
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5
drivers/scsi/libiscsi.c
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@ -1944,7 +1944,7 @@ iscsi_pool_init(struct iscsi_pool *q, int max, void ***items, int item_size)
num_arrays++;
q->pool = kzalloc(num_arrays * max * sizeof(void*), GFP_KERNEL);
if (q->pool == NULL)
goto enomem;
return -ENOMEM;
q->queue = kfifo_init((void*)q->pool, max * sizeof(void*),
GFP_KERNEL, NULL);
@ -1979,8 +1979,7 @@ void iscsi_pool_free(struct iscsi_pool *q)
for (i = 0; i < q->max; i++)
kfree(q->pool[i]);
if (q->pool)
kfree(q->pool);
kfree(q->pool);
kfree(q->queue);
}
EXPORT_SYMBOL_GPL(iscsi_pool_free);