Hi,
Le jeu. 24 janv. 2019 à 19:53, Paul Cercueil a
écrit :
Le jeu. 24 janv. 2019 à 19:46, Stephen Boyd a
écrit :
Quoting Paul Cercueil (2019-01-24 12:46:28)
Le jeu. 24 janv. 2019 à 16:28, Stephen Boyd a
écrit :
> Quoting Guenter Roeck (2019-01-23 10:01:55)
>> On Wed, Jan 23, 2019
Hi,
Le jeu. 10 janv. 2019 à 11:04, Paul Cercueil a
écrit :
Adding Stephen to the discussion.
Adding Stephen to the discussion.
On Sat, Jan 5, 2019 at 6:27 PM, Uwe Kleine-König
wrote:
Hello Paul,
On Sat, Jan 05, 2019 at 06:05:38PM -0300, Paul Cercueil wrote:
On Sat, Jan 5, 2019 at 4:57 P
On 2/22/19 4:53 AM, Andrey Konovalov wrote:
> --- a/mm/mprotect.c
> +++ b/mm/mprotect.c
> @@ -578,6 +578,7 @@ static int do_mprotect_pkey(unsigned long start, size_t
> len,
> SYSCALL_DEFINE3(mprotect, unsigned long, start, size_t, len,
> unsigned long, prot)
> {
> + start = unt
On 2/22/19 4:53 AM, Andrey Konovalov wrote:
> userfaultfd_register() and userfaultfd_unregister() use provided user
> pointers for vma lookups, which can only by done with untagged pointers.
So, we have to patch all these sites before the tagged values get to the
point of hitting the vma lookup fu
On 2/22/19 4:53 AM, Andrey Konovalov wrote:
> --- a/fs/namespace.c
> +++ b/fs/namespace.c
> @@ -2730,7 +2730,7 @@ void *copy_mount_options(const void __user * data)
>* the remainder of the page.
>*/
> /* copy_from_user cannot cross TASK_SIZE ! */
> - size = TASK_SIZE - (un
On 2/22/19 4:53 AM, Andrey Konovalov wrote:
> The following testing approaches has been taken to find potential issues
> with user pointer untagging:
>
> 1. Static testing (with sparse [3] and separately with a custom static
>analyzer based on Clang) to track casts of __user pointers to intege
tree: git://git.lwn.net/linux-2.6 docs-next
head: 19c3fe285cbaa5aa36d60638fc5c37706f2a1c3e
commit: 80fcc98711a3980a8593d8ba4bd9cf9c7646fd60 [68/69] doc: security: Add
kern-doc for lsm_hooks.h
reproduce: make htmldocs
All warnings (new ones prefixed by >>):
drivers/gpu/drm/amd/amdgpu/amdgp
On 2/22/19 11:07 AM, Hauke Mehrtens wrote:
> This callback was removed some time ago, also remove the documentation.
>
> Fixes: 1b6dd556c304 ("net: dsa: Remove prepare phase for FDB")
> Signed-off-by: Hauke Mehrtens
Not sure if this is worth a Fixes: tag since this is not quite a
functional chan
This callback was removed some time ago, also remove the documentation.
Fixes: 1b6dd556c304 ("net: dsa: Remove prepare phase for FDB")
Signed-off-by: Hauke Mehrtens
---
Documentation/networking/dsa/dsa.txt | 10 +++---
1 file changed, 3 insertions(+), 7 deletions(-)
diff --git a/Documentati
On 22/02/2019 15:40, Andrey Konovalov wrote:
> On Fri, Feb 22, 2019 at 4:35 PM Szabolcs Nagy wrote:
>>
>> On 22/02/2019 12:53, Andrey Konovalov wrote:
>>> This patchset is meant to be merged together with "arm64 relaxed ABI" [1].
>>>
>>> arm64 has a feature called Top Byte Ignore, which allows to
On Tue, 19 Feb 2019 07:27:15 -0800
Sean Christopherson wrote:
> ...and use a commit with an obnoxiously long summary in the example to
> make it abundantly clear that keeping the tag on a single line takes
> priority over wrapping at 75 columns. Without the explicit exemption,
> one might assume
On Sun, 17 Feb 2019 14:19:01 -0800
Kees Cook wrote:
> There is a lot of kern-doc for the LSM internals, but it wasn't visible
> in the HTML output. This exposes some formatting flaws in lsm_hooks.h
> that will be fixed in a later series of patches.
>
> Signed-off-by: Kees Cook
Applied, thanks.
On Sun, 17 Feb 2019 19:59:20 -0800
Kees Cook wrote:
> > Are you planning this to go via the doc tree, or would you like me to
> > grab it for the SELinux tree? Either way is fine with me.
> >
> > Acked-by: Paul Moore
>
> Thanks! I figured it'd go via the docs tree since it's mainly moving
>
On Fri, Feb 22, 2019 at 4:35 PM Szabolcs Nagy wrote:
>
> On 22/02/2019 12:53, Andrey Konovalov wrote:
> > This patchset is meant to be merged together with "arm64 relaxed ABI" [1].
> >
> > arm64 has a feature called Top Byte Ignore, which allows to embed pointer
> > tags into the top byte of each
On Wed, 20 Feb 2019 23:46:09 +0100
Federico Vaga wrote:
> The patches fixes some typos in process/license-rules.rst
>
> Signed-off-by: Federico Vaga
Applied, thanks.
jon
On Wed, 20 Feb 2019 20:02:33 -0800
Randy Dunlap wrote:
> From: Randy Dunlap
>
> Fix minimum gcc version as specified in Documentation/process/changes.rst.
>
> Suggested-by: Matthew Wilcox
> Signed-off-by: Randy Dunlap
> ---
> Documentation/admin-guide/README.rst |2 +-
> 1 file changed,
+boot-architecture list
On Tue, Feb 19, 2019 at 07:52:47PM +0800, liaoweixiong wrote:
> Create DT binding document for blkoops.
>
> Signed-off-by: liaoweixiong
> ---
> .../devicetree/bindings/pstore/blkoops.txt | 53
> ++
> MAINTAINERS
On Thu, 21 Feb 2019 21:29:59 +0100
Federico Vaga wrote:
> Synchonise translations: CN, IT, JP, KR
>
> commit 2c71d305caf9 ("docs: process: Remove outdated info about -git patches")
>
> I can guarantee for the Italian translations, but since we are removing
> an entire chapter I think I did it r
On 22/02/2019 12:53, Andrey Konovalov wrote:
> This patchset is meant to be merged together with "arm64 relaxed ABI" [1].
>
> arm64 has a feature called Top Byte Ignore, which allows to embed pointer
> tags into the top byte of each pointer. Userspace programs (such as
> HWASan, a memory debugging
strncpy_from_user and strnlen_user accept user addresses as arguments, and
do not go through the same path as copy_from_user and others, so here we
need to handle the case of tagged user addresses separately.
Untag user pointers passed to these functions.
Signed-off-by: Andrey Konovalov
---
lib
copy_from_user (and a few other similar functions) are used to copy data
from user memory into the kernel memory or vice versa. Since a user can
provided a tagged pointer to one of the syscalls that use copy_from_user,
we need to correctly handle such pointers.
Do this by untagging user pointers i
This patchset is meant to be merged together with "arm64 relaxed ABI" [1].
arm64 has a feature called Top Byte Ignore, which allows to embed pointer
tags into the top byte of each pointer. Userspace programs (such as
HWASan, a memory debugging tool [2]) might use this feature and pass
tagged user
This commit allows tagged pointers to be passed to the following memory
syscalls: madvise, mbind, get_mempolicy, mincore, mlock, mlock2, brk,
mmap_pgoff, old_mmap, munmap, remap_file_pages, mprotect, pkey_mprotect,
mremap, msync and shmdt.
Signed-off-by: Andrey Konovalov
---
ipc/shm.c | 2 +
prctl_set_mm() and prctl_set_mm_map() use provided user pointers for vma
lookups, which can only by done with untagged pointers.
Untag user pointers in these functions.
Signed-off-by: Andrey Konovalov
---
kernel/sys.c | 14 ++
1 file changed, 14 insertions(+)
diff --git a/kernel/sy
In copy_mount_options a user address is being subtracted from TASK_SIZE.
If the address is lower than TASK_SIZE, the size is calculated to not
allow the exact_copy_from_user() call to cross TASK_SIZE boundary.
However if the address is tagged, then the size will be calculated
incorrectly.
Untag th
Document the changes in Documentation/arm64/tagged-pointers.txt.
Signed-off-by: Andrey Konovalov
---
Documentation/arm64/tagged-pointers.txt | 25 +++--
1 file changed, 15 insertions(+), 10 deletions(-)
diff --git a/Documentation/arm64/tagged-pointers.txt
b/Documentation/ar
tcp_zerocopy_receive() uses provided user pointers for vma lookups, which
can only by done with untagged pointers.
Untag user pointers in this function.
Signed-off-by: Andrey Konovalov
---
net/ipv4/tcp.c | 2 ++
1 file changed, 2 insertions(+)
diff --git a/net/ipv4/tcp.c b/net/ipv4/tcp.c
index
userfaultfd_register() and userfaultfd_unregister() use provided user
pointers for vma lookups, which can only by done with untagged pointers.
Untag user pointers in these functions.
Signed-off-by: Andrey Konovalov
---
fs/userfaultfd.c | 5 +
1 file changed, 5 insertions(+)
diff --git a/fs
mm/gup.c provides a kernel interface that accepts user addresses and
manipulates user pages directly (for example get_user_pages, that is used
by the futex syscall). Since a user can provided tagged addresses, we need
to handle such case.
Add untagging to gup.c functions that use user addresses fo
This patch adds a simple test, that calls the uname syscall with a
tagged user pointer as an argument. Without the kernel accepting tagged
user pointers the test fails with EFAULT.
Signed-off-by: Andrey Konovalov
---
tools/testing/selftests/arm64/.gitignore | 1 +
tools/testing/selftests/a
seq_print_user_ip() uses provided user pointers for vma lookups, which
can only by done with untagged pointers.
Untag user pointers in this function.
Signed-off-by: Andrey Konovalov
---
kernel/trace/trace_output.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/kernel/trace/
To allow arm64 syscalls to accept tagged pointers from userspace, we must
untag them when they are passed to the kernel. Since untagging is done in
generic parts of the kernel, the untagged_addr macro needs to be defined
for all architectures.
Define it as a noop for architectures other than arm64
A detail for mac_config() had been missed in the documentation for the
method - it is expected that the method will update the MAC to the
settings, rather than completely reprogram the MAC on each call.
Update the documentation for this method for this detail.
Reviewed-by: Andrew Lunn
Signed-off-
Add some phylink documentation to the networking book detailing how
to convert network drivers from phylib to phylink.
Signed-off-by: Russell King
---
v2: updated with comments from Randy and updated to apply to net-next
Documentation/networking/index.rst | 1 +
Documentation/networking
Hi Randy,
Sorry for the delay.
On Wed, Feb 13, 2019 at 08:00:29PM -0800, Randy Dunlap wrote:
> On 2/5/19 7:58 AM, Russell King wrote:
> > +uses in-band mode, where results from the PHYs negotiation are passed
>
> PHY's
...
> > + Manipulation of the
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