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authorStephen M. Cameron <scameron@beardog.cce.hp.com>2009-09-17 13:47:50 -0500
committerJens Axboe <jens.axboe@oracle.com>2009-10-01 21:15:43 +0200
commit2c935593ac1871211b43a54f023dc3bc605ad346 (patch)
tree7ce33ec7a0f1bb7386a347ed1e31c7f2513ed5c2 /drivers
parent2d11d9931f5968bddac50d9d224c4812d4be869a (diff)
cciss: Fix excessive gendisk freeing bug on driver unload.
Fix bug that free_hba was calling put_disk for all gendisk[] pointers -- all 1024 of them -- regardless of whether the were used or not (NULL). This bug could cause rmmod to oops if logical drives had been deleted during the driver's lifetime. Signed-off-by: Stephen M. Cameron <scameron@beardog.cce.hp.com> Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
Diffstat (limited to 'drivers')
-rw-r--r--drivers/block/cciss.c15
1 files changed, 8 insertions, 7 deletions
diff --git a/drivers/block/cciss.c b/drivers/block/cciss.c
index 0a3c057c778..3a6ca7de4c9 100644
--- a/drivers/block/cciss.c
+++ b/drivers/block/cciss.c
@@ -3893,15 +3893,16 @@ Enomem:
return -1;
}
-static void free_hba(int i)
+static void free_hba(int n)
{
- ctlr_info_t *p = hba[i];
- int n;
+ ctlr_info_t *h = hba[n];
+ int i;
- hba[i] = NULL;
- for (n = 0; n < CISS_MAX_LUN; n++)
- put_disk(p->gendisk[n]);
- kfree(p);
+ hba[n] = NULL;
+ for (i = 0; i < h->highest_lun + 1; i++)
+ if (h->gendisk[i] != NULL)
+ put_disk(h->gendisk[i]);
+ kfree(h);
}
/* Send a message CDB to the firmware. */