linux-kernel - [PATCH 09/63] ide-cd: fix 'ireason' reporting in cdrom_pc

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:	Thu, 20 Dec 2007 01:58:32 +0100
From:	Bartlomiej Zolnierkiewicz <bzolnier@...il.com>
To:	linux-ide@...r.kernel.org
Cc:	linux-kernel@...r.kernel.org
Subject: [PATCH 09/63] ide-cd: fix 'ireason' reporting in cdrom_pc_intr()


Mask 'ireason' variable so only the valid interrupt reason bits
will be reported on "drive appears confused" error.

Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@...il.com>
---
 drivers/ide/ide-cd.c |    6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

Index: b/drivers/ide/ide-cd.c
===================================================================
--- a/drivers/ide/ide-cd.c
+++ b/drivers/ide/ide-cd.c
@@ -1440,7 +1440,7 @@ static ide_startstop_t cdrom_pc_intr (id
 		return ide_stopped;
 
 	/* Read the interrupt reason and the transfer length. */
-	ireason = HWIF(drive)->INB(IDE_IREASON_REG);
+	ireason = HWIF(drive)->INB(IDE_IREASON_REG) & 0x3;
 	lowcyl  = HWIF(drive)->INB(IDE_BCOUNTL_REG);
 	highcyl = HWIF(drive)->INB(IDE_BCOUNTH_REG);
 
@@ -1481,7 +1481,7 @@ static ide_startstop_t cdrom_pc_intr (id
 	if (thislen > len) thislen = len;
 
 	/* The drive wants to be written to. */
-	if ((ireason & 3) == 0) {
+	if (ireason == 0) {
 		if (!rq->data) {
 			blk_dump_rq_flags(rq, "cdrom_pc_intr, write");
 			goto confused;
@@ -1503,7 +1503,7 @@ static ide_startstop_t cdrom_pc_intr (id
 	}
 
 	/* Same drill for reading. */
-	else if ((ireason & 3) == 2) {
+	else if (ireason == 2) {
 		if (!rq->data) {
 			blk_dump_rq_flags(rq, "cdrom_pc_intr, read");
 			goto confused;
--
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/