[SCSI] zfcp: eliminate race between validation and locking

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The check of having a valid pointer was performed before the
processing was secured by the lock. Between those two steps the
pointer can turn invalid.  During further processing another value is
used (referenced by the pointer described above) as a function pointer
which is never verified to be valid either, resulting under some
circumstances in an invalid function call.  This patch is fixing both
issues.

Signed-off-by: Swen Schillig <swen@vnet.ibm.com>
Signed-off-by: Christof Schmitt <christof.schmitt@de.ibm.com>
Signed-off-by: James Bottomley <James.Bottomley@HansenPartnership.com>

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Swen Schillig 2008-11-26 18:07:39 +01:00 • committed by James Bottomley

parent 26871c97d5

commit 0ac55aa90f

1 changed files with 7 additions and 4 deletions

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drivers/s390/scsi/zfcp_fsf.c

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