From: Greg KH <gregkh@suse.de>
To: linux-kernel@vger.kernel.org, stable@kernel.org
Cc: stable-review@kernel.org, torvalds@linux-foundation.org,
akpm@linux-foundation.org, alan@lxorguk.ukuu.org.uk,
Don Zickus <dzickus@redhat.com>, Matthew Garrett <mjg@redhat.com>,
Ingo Molnar <mingo@elte.hu>
Subject: [04/18] x86: Use u32 instead of long to set reset vector back to 0
Date: Fri, 04 Mar 2011 17:02:58 -0800 [thread overview]
Message-ID: <20110305010352.218066009@clark.kroah.org> (raw)
In-Reply-To: <20110305010410.GA18668@kroah.com>
2.6.32-longterm review patch. If anyone has any objections, please let us know.
------------------
From: Don Zickus <dzickus@redhat.com>
commit 299c56966a72b9109d47c71a6db52097098703dd upstream.
A customer of ours, complained that when setting the reset
vector back to 0, it trashed other data and hung their box.
They noticed when only 4 bytes were set to 0 instead of 8,
everything worked correctly.
Mathew pointed out:
|
| We're supposed to be resetting trampoline_phys_low and
| trampoline_phys_high here, which are two 16-bit values.
| Writing 64 bits is definitely going to overwrite space
| that we're not supposed to be touching.
|
So limit the area modified to u32.
Signed-off-by: Don Zickus <dzickus@redhat.com>
Acked-by: Matthew Garrett <mjg@redhat.com>
LKML-Reference: <1297139100-424-1-git-send-email-dzickus@redhat.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
---
arch/x86/include/asm/smpboot_hooks.h | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
--- a/arch/x86/include/asm/smpboot_hooks.h
+++ b/arch/x86/include/asm/smpboot_hooks.h
@@ -34,7 +34,7 @@ static inline void smpboot_restore_warm_
*/
CMOS_WRITE(0, 0xf);
- *((volatile long *)phys_to_virt(apic->trampoline_phys_low)) = 0;
+ *((volatile u32 *)phys_to_virt(apic->trampoline_phys_low)) = 0;
}
static inline void __init smpboot_setup_io_apic(void)
next prev parent reply other threads:[~2011-03-05 1:05 UTC|newest]
Thread overview: 21+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-03-05 1:04 [00/18] 2.6.32.32-longterm review Greg KH
2011-03-05 1:02 ` [01/18] Ocfs2/refcounttree: Fix a bug for refcounttree to writeback clusters in a right number Greg KH
2011-03-05 1:02 ` [02/18] drm: fix unsigned vs signed comparison issue in modeset ctl ioctl Greg KH
2011-03-05 1:02 ` [03/18] mfd: Fix NULL pointer due to non-initialized ucb1x00-ts absinfo Greg KH
2011-03-05 1:02 ` Greg KH [this message]
2011-03-05 1:02 ` [05/18] fuse: fix hang of single threaded fuseblk filesystem Greg KH
2011-03-05 1:03 ` [06/18] clockevents: Prevent oneshot mode when broadcast device is periodic Greg KH
2011-03-05 1:03 ` [07/18] ext2: Fix link count corruption under heavy link+rename load Greg KH
2011-03-05 1:03 ` [08/18] sctp: Fix oops when sending queued ASCONF chunks Greg KH
2011-03-05 1:03 ` [09/18] virtio: set pci bus master enable bit Greg KH
2011-03-05 1:03 ` [10/18] netxen: fix set mac addr Greg KH
2011-03-05 1:03 ` [11/18] HID: add support for Acan FG-8100 barcode reader Greg KH
2011-03-05 1:03 ` [12/18] p54usb: add Senao NUB-350 usbid Greg KH
2011-03-05 1:03 ` [13/18] dccp: fix oops on Reset after close Greg KH
2011-03-05 1:03 ` [14/18] e1000e: disable broken PHY wakeup for ICH10 LOMs, use MAC wakeup instead Greg KH
2011-03-05 1:03 ` [15/18] r8169: disable ASPM Greg KH
2011-03-05 1:03 ` [16/18] usb: iowarrior: dont trust report_size for buffer size Greg KH
2011-03-05 1:03 ` [17/18] arp_notify: unconditionally send gratuitous ARP for NETDEV_NOTIFY_PEERS Greg KH
2011-03-05 9:36 ` Ian Campbell
2011-03-05 17:45 ` Mike Surcouf
2011-03-05 1:03 ` [18/18] CIFS: Fix oplock break handling (try #2) Greg KH
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