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Koen Kooi
189ce92b4c
Signed-off-by: Koen Kooi <koen@dominion.thruhere.net> Signed-off-by: Denys Dmytriyenko <denys@ti.com>
38 lines
1.3 KiB
Diff
38 lines
1.3 KiB
Diff
From af1ad4d4ecbbfca6424c1f8fa40e1aec8fae4836 Mon Sep 17 00:00:00 2001
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From: Stratos Psomadakis <psomas@gentoo.org>
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Date: Sun, 4 Dec 2011 02:23:54 +0200
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Subject: [PATCH 105/129] sym53c8xx: Fix NULL pointer dereference in
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slave_destroy
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commit cced5041ed5a2d1352186510944b0ddfbdbe4c0b upstream.
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sym53c8xx_slave_destroy unconditionally assumes that sym53c8xx_slave_alloc has
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succesesfully allocated a sym_lcb. This can lead to a NULL pointer dereference
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(exposed by commit 4e6c82b).
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Signed-off-by: Stratos Psomadakis <psomas@gentoo.org>
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Signed-off-by: James Bottomley <JBottomley@Parallels.com>
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Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
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---
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drivers/scsi/sym53c8xx_2/sym_glue.c | 4 ++++
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1 file changed, 4 insertions(+)
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diff --git a/drivers/scsi/sym53c8xx_2/sym_glue.c b/drivers/scsi/sym53c8xx_2/sym_glue.c
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index b4543f5..36d1ed7 100644
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--- a/drivers/scsi/sym53c8xx_2/sym_glue.c
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+++ b/drivers/scsi/sym53c8xx_2/sym_glue.c
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@@ -839,6 +839,10 @@ static void sym53c8xx_slave_destroy(struct scsi_device *sdev)
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struct sym_lcb *lp = sym_lp(tp, sdev->lun);
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unsigned long flags;
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+ /* if slave_alloc returned before allocating a sym_lcb, return */
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+ if (!lp)
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+ return;
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+
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spin_lock_irqsave(np->s.host->host_lock, flags);
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if (lp->busy_itlq || lp->busy_itl) {
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--
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1.7.9.5
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