From: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
To: linux-kernel@vger.kernel.org
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
stable@vger.kernel.org, Jan Beulich <jbeulich@suse.com>,
Ian Campbell <ian.campbell@citrix.com>,
Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
Subject: [ 17/46] xen/blkback: Dont trust the handle from the frontend.
Date: Fri, 1 Mar 2013 11:45:05 -0800 [thread overview]
Message-ID: <20130301194434.062149548@linuxfoundation.org> (raw)
In-Reply-To: <20130301194432.263409302@linuxfoundation.org>
3.4-stable review patch. If anyone has any objections, please let me know.
------------------
From: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
commit 01c681d4c70d64cb72142a2823f27c4146a02e63 upstream.
The 'handle' is the device that the request is from. For the life-time
of the ring we copy it from a request to a response so that the frontend
is not surprised by it. But we do not need it - when we start processing
I/Os we have our own 'struct phys_req' which has only most essential
information about the request. In fact the 'vbd_translate' ends up
over-writing the preq.dev with a value from the backend.
This assignment of preq.dev with the 'handle' value is superfluous
so lets not do it.
Acked-by: Jan Beulich <jbeulich@suse.com>
Acked-by: Ian Campbell <ian.campbell@citrix.com>
Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
drivers/block/xen-blkback/blkback.c | 1 -
1 file changed, 1 deletion(-)
--- a/drivers/block/xen-blkback/blkback.c
+++ b/drivers/block/xen-blkback/blkback.c
@@ -623,7 +623,6 @@ static int dispatch_rw_block_io(struct x
goto fail_response;
}
- preq.dev = req->u.rw.handle;
preq.sector_number = req->u.rw.sector_number;
preq.nr_sects = 0;
next prev parent reply other threads:[~2013-03-01 20:03 UTC|newest]
Thread overview: 49+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-03-01 19:44 [ 00/46] 3.4.35-stable review Greg Kroah-Hartman
2013-03-01 19:44 ` [ 01/46] ALSA: hda - hdmi: Make jacks phantom, if theyre not detectable Greg Kroah-Hartman
2013-03-01 19:44 ` [ 02/46] quota: autoload the quota_v2 module for QFMT_VFS_V1 quota format Greg Kroah-Hartman
2013-03-01 19:44 ` [ 03/46] iommu/amd: Initialize device table after dma_ops Greg Kroah-Hartman
2013-03-01 19:44 ` [ 04/46] posix-timer: Dont call idr_find() with out-of-range ID Greg Kroah-Hartman
2013-03-01 19:44 ` [ 05/46] ftrace: Call ftrace cleanup module notifier after all other notifiers Greg Kroah-Hartman
2013-03-01 19:44 ` [ 06/46] x86, efi: Make "noefi" really disable EFI runtime serivces Greg Kroah-Hartman
2013-03-01 19:44 ` [ 07/46] doc, xen: Mention earlyprintk=xen in the documentation Greg Kroah-Hartman
2013-03-01 19:44 ` [ 08/46] doc, kernel-parameters: Document console=hvc<n> Greg Kroah-Hartman
2013-03-01 19:44 ` [ 09/46] x86: Make sure we can boot in the case the BDA contains pure garbage Greg Kroah-Hartman
2013-03-01 19:44 ` [ 10/46] target: Fix lookup of dynamic NodeACLs during cached demo-mode operation Greg Kroah-Hartman
2013-03-01 19:44 ` [ 11/46] target: Add missing mapped_lun bounds checking during make_mappedlun setup Greg Kroah-Hartman
2013-03-01 19:45 ` [ 12/46] ocfs2: fix possible use-after-free with AIO Greg Kroah-Hartman
2013-03-01 19:45 ` [ 13/46] ocfs2: fix ocfs2_init_security_and_acl() to initialize acl correctly Greg Kroah-Hartman
2013-03-01 19:45 ` [ 14/46] ocfs2: ac->ac_allow_chain_relink=0 wont disable group relink Greg Kroah-Hartman
2013-03-01 19:45 ` [ 15/46] block: fix ext_devt_idr handling Greg Kroah-Hartman
2013-03-01 19:45 ` [ 16/46] xen-blkback: do not leak mode property Greg Kroah-Hartman
2013-03-01 19:45 ` Greg Kroah-Hartman [this message]
2013-03-01 19:45 ` [ 18/46] idr: fix a subtle bug in idr_get_next() Greg Kroah-Hartman
2013-03-01 19:45 ` [ 19/46] block: fix synchronization and limit check in blk_alloc_devt() Greg Kroah-Hartman
2013-03-01 19:45 ` [ 20/46] firewire: add minor number range check to fw_device_init() Greg Kroah-Hartman
2013-03-01 19:45 ` [ 21/46] sysctl: fix null checking in bin_dn_node_address() Greg Kroah-Hartman
2013-03-01 19:45 ` [ 22/46] fs: Fix possible use-after-free with AIO Greg Kroah-Hartman
2013-03-01 19:45 ` [ 23/46] media: rc: unlock on error in show_protocols() Greg Kroah-Hartman
2013-03-01 19:45 ` [ 24/46] ext4: check bh in ext4_read_block_bitmap() Greg Kroah-Hartman
2013-03-01 19:45 ` [ 25/46] ext4: fix race in ext4_mb_add_n_trim() Greg Kroah-Hartman
2013-03-01 19:45 ` [ 26/46] ext4: fix xattr block allocation/release with bigalloc Greg Kroah-Hartman
2013-03-01 19:45 ` [ 27/46] ext4: fix free clusters calculation in bigalloc filesystem Greg Kroah-Hartman
2013-03-01 19:45 ` [ 28/46] nfsd: Fix memleak Greg Kroah-Hartman
2013-03-01 19:45 ` [ 29/46] svcrpc: make svc_age_temp_xprts enqueue under sv_lock Greg Kroah-Hartman
2013-03-01 19:45 ` [ 30/46] vhost: fix length for cross region descriptor Greg Kroah-Hartman
2013-03-01 19:45 ` [ 31/46] fuse: dont WARN when nlink is zero Greg Kroah-Hartman
2013-03-01 19:45 ` [ 32/46] unbreak automounter support on 64-bit kernel with 32-bit userspace (v2) Greg Kroah-Hartman
2013-03-01 19:45 ` [ 33/46] ath9k_hw: fix calibration issues on chainmask that dont include chain 0 Greg Kroah-Hartman
2013-03-01 19:45 ` [ 34/46] pstore: Avoid deadlock in panic and emergency-restart path Greg Kroah-Hartman
2013-03-01 19:45 ` [ 35/46] cpuset: fix cpuset_print_task_mems_allowed() vs rename() race Greg Kroah-Hartman
2013-03-01 19:45 ` [ 36/46] cgroup: fix exit() vs rmdir() race Greg Kroah-Hartman
2013-03-01 19:45 ` [ 37/46] ab8500-chargalg: Only root should have write permission on sysfs file Greg Kroah-Hartman
2013-03-01 19:45 ` [ 38/46] ab8500_btemp: Demote initcall sequence Greg Kroah-Hartman
2013-03-01 19:45 ` [ 39/46] ACPI: Add DMI entry for Sony VGN-FW41E_H Greg Kroah-Hartman
2013-03-01 19:45 ` [ 40/46] staging: comedi: ni_labpc: correct differential channel sequence for AI commands Greg Kroah-Hartman
2013-03-01 19:45 ` [ 41/46] staging: comedi: ni_labpc: set up command4 register *after* command3 Greg Kroah-Hartman
2013-03-01 19:45 ` [ 42/46] staging: comedi: check s->async for poll(), read() and write() Greg Kroah-Hartman
2013-03-01 19:45 ` [ 43/46] perf tools: Fix build with bison 2.3 and older Greg Kroah-Hartman
2013-03-01 19:45 ` [ 44/46] ata_piix: IDE-mode SATA patch for Intel Avoton DeviceIDs Greg Kroah-Hartman
2013-03-01 19:45 ` [ 45/46] ata_piix: Add Device IDs for Intel Wellsburg PCH Greg Kroah-Hartman
2013-03-01 19:45 ` [ 46/46] [hid] usb hid quirks for Masterkit MA901 usb radio Greg Kroah-Hartman
2013-03-02 3:59 ` [ 00/46] 3.4.35-stable review Shuah Khan
2013-03-03 11:48 ` Satoru Takeuchi
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=20130301194434.062149548@linuxfoundation.org \
--to=gregkh@linuxfoundation.org \
--cc=ian.campbell@citrix.com \
--cc=jbeulich@suse.com \
--cc=konrad.wilk@oracle.com \
--cc=linux-kernel@vger.kernel.org \
--cc=stable@vger.kernel.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox