diff options
| author | Stratos Psomadakis <psomas@gentoo.org> | 2011-12-04 02:23:54 +0200 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@suse.de> | 2012-01-25 13:53:24 -0800 |
| commit | 751153cccad7b285060c11af30379fcf599dc625 (patch) | |
| tree | cf5bdd4e5ac8c64a0ced7203635b574a3fcd13a4 | |
| parent | 710021f8bc65ae2b61df6cd34915da9b22c4c9fc (diff) | |
sym53c8xx: Fix NULL pointer dereference in slave_destroy
commit cced5041ed5a2d1352186510944b0ddfbdbe4c0b upstream.
sym53c8xx_slave_destroy unconditionally assumes that sym53c8xx_slave_alloc has
succesesfully allocated a sym_lcb. This can lead to a NULL pointer dereference
(exposed by commit 4e6c82b).
Signed-off-by: Stratos Psomadakis <psomas@gentoo.org>
Signed-off-by: James Bottomley <JBottomley@Parallels.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
| -rw-r--r-- | drivers/scsi/sym53c8xx_2/sym_glue.c | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/drivers/scsi/sym53c8xx_2/sym_glue.c b/drivers/scsi/sym53c8xx_2/sym_glue.c index 45374d66d26..c19ca5e35ba 100644 --- a/drivers/scsi/sym53c8xx_2/sym_glue.c +++ b/drivers/scsi/sym53c8xx_2/sym_glue.c @@ -837,6 +837,10 @@ static void sym53c8xx_slave_destroy(struct scsi_device *sdev) struct sym_lcb *lp = sym_lp(tp, sdev->lun); unsigned long flags; + /* if slave_alloc returned before allocating a sym_lcb, return */ + if (!lp) + return; + spin_lock_irqsave(np->s.host->host_lock, flags); if (lp->busy_itlq || lp->busy_itl) { |