linux-kernel - [24/55] [SCSI] libsas: remove expander from dev list on error

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-Id: <20110806000251.278034749@clark.kroah.org>
Date:	Fri, 05 Aug 2011 17:01:54 -0700
From:	Greg KH <gregkh@...e.de>
To:	linux-kernel@...r.kernel.org, stable@...nel.org
Cc:	stable-review@...nel.org, torvalds@...ux-foundation.org,
	akpm@...ux-foundation.org, alan@...rguk.ukuu.org.uk,
	Luben Tuikov <ltuikov@...oo.com>,
	James Bottomley <JBottomley@...allels.com>
Subject: [24/55] [SCSI] libsas: remove expander from dev list on error

2.6.32-longterm review patch.  If anyone has any objections, please let us know.

------------------

From: Luben Tuikov <ltuikov@...oo.com>

commit 5911e963d3718e306bcac387b83e259aa4228896 upstream.

If expander discovery fails (sas_discover_expander()), remove the
expander from the port device list (sas_ex_discover_expander()),
before freeing it. Else the list is corrupted and, e.g., when we
attempt to send SMP commands to other devices, the kernel oopses.

Signed-off-by: Luben Tuikov <ltuikov@...oo.com>
Reviewed-by: Jack Wang <jack_wang@...sh.com>
Signed-off-by: James Bottomley <JBottomley@...allels.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@...e.de>

---
 drivers/scsi/libsas/sas_expander.c |    3 +++
 1 file changed, 3 insertions(+)

--- a/drivers/scsi/libsas/sas_expander.c
+++ b/drivers/scsi/libsas/sas_expander.c
@@ -840,6 +840,9 @@ static struct domain_device *sas_ex_disc
 
 	res = sas_discover_expander(child);
 	if (res) {
+		spin_lock_irq(&parent->port->dev_list_lock);
+		list_del(&child->dev_list_node);
+		spin_unlock_irq(&parent->port->dev_list_lock);
 		kfree(child);
 		return NULL;
 	}


--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/