linux-kernel - [PATCH] Remove unneeded lock_kernel() in drivers/block/loop.c

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>] [day] [month] [year] [list]

Message-ID: <20070704000045.GA18143@motherbox.xtechq.com.ar>
Date:	Tue, 3 Jul 2007 21:00:45 -0300
From:	Diego Woitasen <diego@...tasen.com.ar>
To:	linux-kernel@...r.kernel.org
Subject: [PATCH] Remove unneeded lock_kernel() in drivers/block/loop.c


This patch remove the unneeded lock_kernel() in drivers/block/loop.c. I
read the code as this lock_kernel() doesn't protect anything. Loopback
code use lo_ctl_mutex for syncronization.

diff --git a/drivers/block/loop.c b/drivers/block/loop.c
index 0ed5470..1cc004e 100644
--- a/drivers/block/loop.c
+++ b/drivers/block/loop.c
@@ -1286,7 +1286,6 @@ static long lo_compat_ioctl(struct file *file, unsigned int cmd, unsigned long a
 	struct loop_device *lo = inode->i_bdev->bd_disk->private_data;
 	int err;
 
-	lock_kernel();
 	switch(cmd) {
 	case LOOP_SET_STATUS:
 		mutex_lock(&lo->lo_ctl_mutex);
@@ -1312,7 +1311,6 @@ static long lo_compat_ioctl(struct file *file, unsigned int cmd, unsigned long a
 		err = -ENOIOCTLCMD;
 		break;
 	}
-	unlock_kernel();
 	return err;
 }
 #endif


-- 

--------------
Diego Woitasen
-
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/