st: fix potential null pointer dereference.

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If cdev_add() returns an error, the code calls
cdev_del() passing the STm->cdevs[rew] pointer as parameter;
the problem is that the pointer has not been initialized yet.

This patch fixes the problem by moving the STm->cdevs[rew] pointer
initialization before the call to cdev_add().
It also sets STm->devs[rew] and STm->cdevs[rew] to NULL in
case of failure.

Signed-off-by: Maurizio Lombardi <mlombard@redhat.com>
Reviewed-by: Johannes Thumshirn <jthumshirn@suse.de>
Reviewed-by: Tomas Henzl <thenzl@redhat.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>

...

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Maurizio Lombardi 2015-11-18 15:32:44 +01:00 • committed by Martin K. Petersen

parent a35bb4458e

commit ab08ee1439

1 changed files with 3 additions and 2 deletions

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drivers/scsi/st.c

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