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cciss: Make cciss_seq_show handle holes in the h->drv[] array
It is possible (and expected) for there to be holes in the h->drv[] array, that is, some elements may be NULL pointers. cciss_seq_show needs to be made aware of this possibility to avoid an Oops. To reproduce the Oops which this fixes: 1) Create two "arrays" in the Array Configuratino Utility and several logical drives on each array. 2) cat /proc/driver/cciss/cciss* in an infinite loop 3) delete some of the logical drives in the first "array." Signed-off-by: Stephen M. Cameron <scameron@beardog.cce.hp.com> Cc: stable@kernel.org Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
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@ -337,6 +337,9 @@ static int cciss_seq_show(struct seq_file *seq, void *v)
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if (*pos > h->highest_lun)
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return 0;
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if (drv == NULL) /* it's possible for h->drv[] to have holes. */
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return 0;
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if (drv->heads == 0)
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return 0;
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