linux-kernel - [PATCH] Remove bdput from do_open() in fs/block

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-next>] [day] [month] [year] [list]

Date:	Sat, 04 Aug 2007 23:48:34 +0200
From:	Rafał Bilski <rafalbilski@...eria.pl>
To:	Alexander Viro <viro@...iv.linux.org.uk>
Cc:	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>
Subject: [PATCH] Remove bdput from do_open() in fs/block_dev.c

I mistyped
# echo /dev/hdc1 >/sys/module/block2mtd/parameters/block2mt
instead of sdc1. There is no /dev/hdc1. I have DVD-ROM as /dev/hdc.
# dmesg
block2mtd: version $Revision: 1.30 $
block2mtd: error: cannot open device /dev/hdc1
Looks right, but tray is locked. And it doesn't want to get out.
# eject
hdc: irq timeout: status=0xd0 { Busy }
ide: failed opcode was: unknown
WARNING: at kernel/irq/resend.c:70 check_irq_resend()
 [<c013444b>] check_irq_resend+0xab/0xc0
 [<c0133e2a>] enable_irq+0x4a/0xa0
 [<c02c26e7>] ide_error+0x47/0xa0
 [<c02d1e60>] cdrom_newpc_intr+0x0/0x300
 [<c02c2bc0>] ide_timer_expiry+0x1e0/0x2d0
 [<c02c29e0>] ide_timer_expiry+0x0/0x2d0
 [<c011b986>] run_timer_softirq+0x116/0x160
 [<c0127e75>] hrtimer_interrupt+0x165/0x1a0
 [<c0118772>] __do_softirq+0x42/0x90
 [<c01187e6>] do_softirq+0x26/0x30
 [<c0118aaa>] irq_exit+0x5a/0x60
 [<c0104817>] do_IRQ+0x47/0x80
 [<c0102c23>] common_interrupt+0x23/0x30
 [<c0281a46>] acpi_processor_idle+0x162/0x380
 [<c0100d0e>] cpu_idle+0x4e/0x70
 [<c0524ac5>] start_kernel+0x1f5/0x240
 [<c05243a0>] unknown_bootoption+0x0/0x1e0
 =======================

Removing bdput from do_open() in fs/block_dev.c seems 
to be a cure for irq timeout.

Signed-off-by: Rafał Bilski <rafalbilski@...eria.pl>
--- 
diff --git a/fs/block_dev.c b/fs/block_dev.c 
--- a/fs/block_dev.c
+++ b/fs/block_dev.c
@@ -1120,7 +1120,6 @@ static int do_open(struct block_device *
 	disk = get_gendisk(bdev->bd_dev, &part);
 	if (!disk) {
 		unlock_kernel();
-		bdput(bdev);
 		return ret;
 	}
 	owner = disk->fops->owner;

----------------------------------------------------------------------
Wszystko czego potrzebujesz latem: kremy do opalania, 
stroje kapielowe, maly romans 

>>>http://link.interia.pl/f1b15

-
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/