linux-toradex.git, branch v3.2.61 Linux kernel for Apalis and Colibri modules Linux 3.2.61 2014-07-11T12:34:01+00:00 Ben Hutchings ben@decadent.org.uk 2014-07-11T12:34:01+00:00 e9b1a5ca4be235d1eef84c754f78f53b1ca1a242 






skbuff: skb_segment: orphan frags before copying
2014-07-11T12:34:00+00:00

Michael S. Tsirkin
mst@redhat.com

2014-03-10T17:28:08+00:00

77c01a54cde87eb3bf6685fb44398352f11db3fa

commit 1fd819ecb90cc9b822cd84d3056ddba315d3340f upstream.

skb_segment copies frags around, so we need
to copy them carefully to avoid accessing
user memory after reporting completion to userspace
through a callback.

skb_segment doesn't normally happen on datapath:
TSO needs to be disabled - so disabling zero copy
in this case does not look like a big deal.

Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Acked-by: Herbert Xu <herbert@gondor.apana.org.au>
Signed-off-by: David S. Miller <davem@davemloft.net>
[bwh: Backported to 3.2.  As skb_segment() only supports page-frags *or* a
 frag list, there is no need for the additional frag_skb pointer or the
 preparatory renaming.]
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>





commit 1fd819ecb90cc9b822cd84d3056ddba315d3340f upstream.

skb_segment copies frags around, so we need
to copy them carefully to avoid accessing
user memory after reporting completion to userspace
through a callback.

skb_segment doesn't normally happen on datapath:
TSO needs to be disabled - so disabling zero copy
in this case does not look like a big deal.

Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Acked-by: Herbert Xu <herbert@gondor.apana.org.au>
Signed-off-by: David S. Miller <davem@davemloft.net>
[bwh: Backported to 3.2.  As skb_segment() only supports page-frags *or* a
 frag list, there is no need for the additional frag_skb pointer or the
 preparatory renaming.]
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>







skbuff: export skb_copy_ubufs
2014-07-11T12:34:00+00:00

Michael S. Tsirkin
mst@redhat.com

2012-07-20T09:23:20+00:00

3ee479fddc52bbcb3b215be56673e9784890b486

commit dcc0fb782b3a6e2abfeaaeb45dd88ed09596be0f upstream.

Export skb_copy_ubufs so that modules can orphan frags.

Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>





commit dcc0fb782b3a6e2abfeaaeb45dd88ed09596be0f upstream.

Export skb_copy_ubufs so that modules can orphan frags.

Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>







skbuff: add an api to orphan frags
2014-07-11T12:33:59+00:00

Michael S. Tsirkin
mst@redhat.com

2012-07-20T09:23:07+00:00

dc4f7b1edb525ee356abc0f7ef96550dcd0a3d4c

commit a353e0ce0fd42d8859260666d1e9b10f2abd4698 upstream.

Many places do
       if ((skb_shinfo(skb)->tx_flags & SKBTX_DEV_ZEROCOPY))
		skb_copy_ubufs(skb, gfp_mask);
to copy and invoke frag destructors if necessary.
Add an inline helper for this.

Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>





commit a353e0ce0fd42d8859260666d1e9b10f2abd4698 upstream.

Many places do
       if ((skb_shinfo(skb)->tx_flags & SKBTX_DEV_ZEROCOPY))
		skb_copy_ubufs(skb, gfp_mask);
to copy and invoke frag destructors if necessary.
Add an inline helper for this.

Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>







ptrace,x86: force IRET path after a ptrace_stop()
2014-07-11T12:33:59+00:00

Tejun Heo
tj@kernel.org

2014-07-03T19:43:15+00:00

a0eb191eff753e790def174b3fbe66efadfd401d

commit b9cd18de4db3c9ffa7e17b0dc0ca99ed5aa4d43a upstream.

The 'sysret' fastpath does not correctly restore even all regular
registers, much less any segment registers or reflags values.  That is
very much part of why it's faster than 'iret'.

Normally that isn't a problem, because the normal ptrace() interface
catches the process using the signal handler infrastructure, which
always returns with an iret.

However, some paths can get caught using ptrace_event() instead of the
signal path, and for those we need to make sure that we aren't going to
return to user space using 'sysret'.  Otherwise the modifications that
may have been done to the register set by the tracer wouldn't
necessarily take effect.

Fix it by forcing IRET path by setting TIF_NOTIFY_RESUME from
arch_ptrace_stop_needed() which is invoked from ptrace_stop().

Signed-off-by: Tejun Heo <tj@kernel.org>
Reported-by: Andy Lutomirski <luto@amacapital.net>
Acked-by: Oleg Nesterov <oleg@redhat.com>
Suggested-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>





commit b9cd18de4db3c9ffa7e17b0dc0ca99ed5aa4d43a upstream.

The 'sysret' fastpath does not correctly restore even all regular
registers, much less any segment registers or reflags values.  That is
very much part of why it's faster than 'iret'.

Normally that isn't a problem, because the normal ptrace() interface
catches the process using the signal handler infrastructure, which
always returns with an iret.

However, some paths can get caught using ptrace_event() instead of the
signal path, and for those we need to make sure that we aren't going to
return to user space using 'sysret'.  Otherwise the modifications that
may have been done to the register set by the tracer wouldn't
necessarily take effect.

Fix it by forcing IRET path by setting TIF_NOTIFY_RESUME from
arch_ptrace_stop_needed() which is invoked from ptrace_stop().

Signed-off-by: Tejun Heo <tj@kernel.org>
Reported-by: Andy Lutomirski <luto@amacapital.net>
Acked-by: Oleg Nesterov <oleg@redhat.com>
Suggested-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>







Documentation: Update stable address in Chinese and Japanese translations
2014-07-11T12:33:59+00:00

Geert Uytterhoeven
geert+renesas@glider.be

2014-04-14T16:52:14+00:00

5005abc1a94da6906af4b1e09d4472b94f1f9c66

commit 98b0f811aade1b7c6e7806c86aa0befd5919d65f upstream.

The English and Korean translations were updated, the Chinese and Japanese
weren't.

Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>





commit 98b0f811aade1b7c6e7806c86aa0befd5919d65f upstream.

The English and Korean translations were updated, the Chinese and Japanese
weren't.

Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>







ARM: 8012/1: kdump: Avoid overflow when converting pfn to physaddr
2014-07-11T12:33:59+00:00

Liu Hua
sdu.liu@huawei.com

2014-03-27T05:56:18+00:00

64bf838ef253a6c5b05530461f2aee94bbfecc5b

commit 8fad87bca7ac9737e413ba5f1656f1114a8c314d upstream.

When we configure CONFIG_ARM_LPAE=y, pfn << PAGE_SHIFT will
overflow if pfn >= 0x100000 in copy_oldmem_page.
So use __pfn_to_phys for converting.

Signed-off-by: Liu Hua <sdu.liu@huawei.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>





commit 8fad87bca7ac9737e413ba5f1656f1114a8c314d upstream.

When we configure CONFIG_ARM_LPAE=y, pfn << PAGE_SHIFT will
overflow if pfn >= 0x100000 in copy_oldmem_page.
So use __pfn_to_phys for converting.

Signed-off-by: Liu Hua <sdu.liu@huawei.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>







iommu/vt-d: Fix missing IOTLB flush in intel_iommu_unmap()
2014-07-11T12:33:59+00:00

David Woodhouse
dwmw2@infradead.org

2014-06-09T13:09:53+00:00

fac90e80d8e567113477de8f1ce91e2e3410ac57

Part of commit ea8ea460c9ace60bbb5ac6e5521d637d5c15293d upstream.

This missing IOTLB flush was added as a minor, inconsequential bug-fix
in commit ea8ea460c ("iommu/vt-d: Clean up and fix page table clear/free
behaviour") in 3.15. It wasn't originally intended for -stable but a
couple of users have reported issues which turn out to be fixed by
adding the missing flush.

Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
[bwh: Backported to 3.2:
 - Adjust context
 - Use &dmar_domain->iommu_bmp, as it is a single word not an array]
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>





Part of commit ea8ea460c9ace60bbb5ac6e5521d637d5c15293d upstream.

This missing IOTLB flush was added as a minor, inconsequential bug-fix
in commit ea8ea460c ("iommu/vt-d: Clean up and fix page table clear/free
behaviour") in 3.15. It wasn't originally intended for -stable but a
couple of users have reported issues which turn out to be fixed by
adding the missing flush.

Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
[bwh: Backported to 3.2:
 - Adjust context
 - Use &dmar_domain->iommu_bmp, as it is a single word not an array]
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>







megaraid: Use resource_size_t for PCI resources, not long
2014-07-11T12:33:58+00:00

Ben Collins
ben.c@servergy.com

2013-09-13T16:46:44+00:00

30c7c6dfd9c8a42aacd6d0d61d2209bc13abbfa3

commit 11f8a7b31f2140b0dc164bb484281235ffbe51d3 upstream.

The assumption that sizeof(long) >= sizeof(resource_size_t) can lead to
truncation of the PCI resource address, meaning this driver didn't work
on 32-bit systems with 64-bit PCI adressing ranges.

Signed-off-by: Ben Collins <ben.c@servergy.com>
Acked-by: Sumit Saxena <sumit.saxena@lsi.com>
Signed-off-by: James Bottomley <JBottomley@Parallels.com>
[bwh: Backported to 3.2: adjust context]
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>





commit 11f8a7b31f2140b0dc164bb484281235ffbe51d3 upstream.

The assumption that sizeof(long) >= sizeof(resource_size_t) can lead to
truncation of the PCI resource address, meaning this driver didn't work
on 32-bit systems with 64-bit PCI adressing ranges.

Signed-off-by: Ben Collins <ben.c@servergy.com>
Acked-by: Sumit Saxena <sumit.saxena@lsi.com>
Signed-off-by: James Bottomley <JBottomley@Parallels.com>
[bwh: Backported to 3.2: adjust context]
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>







Fix spurious request sense in error handling
2014-07-11T12:33:58+00:00

James Bottomley
JBottomley@Parallels.com

2014-03-28T17:50:17+00:00

c8d446a0623a08338ea07f45eed36569d8242485

commit d555a2abf3481f81303d835046a5ec2c4fb3ca8e upstream.

We unconditionally execute scsi_eh_get_sense() to make sure all failed
commands that should have sense attached, do.  However, the routine forgets
that some commands, because of the way they fail, will not have any sense code
... we should not bother them with a REQUEST_SENSE command.  Fix this by
testing to see if we actually got a CHECK_CONDITION return and skip asking for
sense if we don't.

Tested-by: Alan Stern <stern@rowland.harvard.edu>
Signed-off-by: James Bottomley <JBottomley@Parallels.com>
[bwh: Backported to 3.2: adjust context]
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>





commit d555a2abf3481f81303d835046a5ec2c4fb3ca8e upstream.

We unconditionally execute scsi_eh_get_sense() to make sure all failed
commands that should have sense attached, do.  However, the routine forgets
that some commands, because of the way they fail, will not have any sense code
... we should not bother them with a REQUEST_SENSE command.  Fix this by
testing to see if we actually got a CHECK_CONDITION return and skip asking for
sense if we don't.

Tested-by: Alan Stern <stern@rowland.harvard.edu>
Signed-off-by: James Bottomley <JBottomley@Parallels.com>
[bwh: Backported to 3.2: adjust context]
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>