linux-kernel - [PATCH 07/29] memstick: mspro: two fixes

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: <1287791637-10329-8-git-send-email-maximlevitsky@gmail.com>
Date:	Sat, 23 Oct 2010 01:53:35 +0200
From:	Maxim Levitsky <maximlevitsky@...il.com>
To:	Alex Dubov <oakad@...oo.com>
Cc:	Andrew Morton <akpm@...ux-foundation.org>,
	LKML <linux-kernel@...r.kernel.org>,
	Maxim Levitsky <maximlevitsky@...il.com>
Subject: [PATCH 07/29] memstick: mspro: two fixes

fix uninitialized spinlock warning on resume
and race in idr_pre_get

Signed-off-by: Maxim Levitsky <maximlevitsky@...il.com>
---
 drivers/memstick/core/mspro_block.c |   10 ++++++++--
 1 files changed, 8 insertions(+), 2 deletions(-)

diff --git a/drivers/memstick/core/mspro_block.c b/drivers/memstick/core/mspro_block.c
index a979c9d..13cb83b 100644
--- a/drivers/memstick/core/mspro_block.c
+++ b/drivers/memstick/core/mspro_block.c
@@ -485,6 +485,7 @@ has_int_reg:
 		t_offset = msb->req_sg[msb->current_seg].offset;
 		t_offset += msb->current_page * msb->page_size;
 
+		sg_init_table(&t_sg, 1);
 		sg_set_page(&t_sg,
 			    nth_page(sg_page(&(msb->req_sg[msb->current_seg])),
 				     t_offset >> PAGE_SHIFT),
@@ -1056,10 +1057,13 @@ static int mspro_block_init_disk(struct memstick_dev *card)
 
 	msb->page_size = be16_to_cpu(sys_info->unit_size);
 
-	if (!idr_pre_get(&mspro_block_disk_idr, GFP_KERNEL))
+	mutex_lock(&mspro_block_disk_lock);
+
+	if (!idr_pre_get(&mspro_block_disk_idr, GFP_KERNEL)) {
+		mutex_unlock(&mspro_block_disk_lock);
 		return -ENOMEM;
+	}
 
-	mutex_lock(&mspro_block_disk_lock);
 	rc = idr_get_new(&mspro_block_disk_idr, card, &disk_id);
 	mutex_unlock(&mspro_block_disk_lock);
 
@@ -1248,6 +1252,8 @@ static int mspro_block_resume(struct memstick_dev *card)
 
 	new_msb->card = card;
 	memstick_set_drvdata(card, new_msb);
+	spin_lock_init(&new_msb->q_lock);
+
 	if (mspro_block_init_card(card))
 		goto out_free;
 
-- 
1.7.1

--
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/