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| author | Stratos Psomadakis <psomas@gentoo.org> | 2011-12-04 04:23:54 +0400 |
|---|---|---|
| committer | James Bottomley <JBottomley@Parallels.com> | 2012-01-11 03:01:18 +0400 |
| commit | cced5041ed5a2d1352186510944b0ddfbdbe4c0b (patch) | |
| tree | 8c104162d1e5b6ecfad4f560342aa043bce6c30d /drivers | |
| parent | 9fc397fc0878c9540af20cbffc4d546541fe8b23 (diff) | |
| download | linux-cced5041ed5a2d1352186510944b0ddfbdbe4c0b.tar.xz | |
[SCSI] sym53c8xx: Fix NULL pointer dereference in slave_destroy
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>
Cc: stable@vger.kernel.org
Signed-off-by: James Bottomley <JBottomley@Parallels.com>
Diffstat (limited to 'drivers')
| -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 b4543f575f46..36d1ed7817eb 100644 --- a/drivers/scsi/sym53c8xx_2/sym_glue.c +++ b/drivers/scsi/sym53c8xx_2/sym_glue.c @@ -839,6 +839,10 @@ 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) { |