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git://git.kernel.org/pub/scm/linux/kernel/git/jmorris/linux-security
Pull security subsystem updates from James Morris:
"Highlights:
- PKCS#7 support added to support signed kexec, also utilized for
module signing. See comments in 3f1e1bea.
** NOTE: this requires linking against the OpenSSL library, which
must be installed, e.g. the openssl-devel on Fedora **
- Smack
- add IPv6 host labeling; ignore labels on kernel threads
- support smack labeling mounts which use binary mount data
- SELinux:
- add ioctl whitelisting (see
http://kernsec.org/files/lss2015/vanderstoep.pdf)
- fix mprotect PROT_EXEC regression caused by mm change
- Seccomp:
- add ptrace options for suspend/resume"
* 'next' of git://git.kernel.org/pub/scm/linux/kernel/git/jmorris/linux-security: (57 commits)
PKCS#7: Add OIDs for sha224, sha284 and sha512 hash algos and use them
Documentation/Changes: Now need OpenSSL devel packages for module signing
scripts: add extract-cert and sign-file to .gitignore
modsign: Handle signing key in source tree
modsign: Use if_changed rule for extracting cert from module signing key
Move certificate handling to its own directory
sign-file: Fix warning about BIO_reset() return value
PKCS#7: Add MODULE_LICENSE() to test module
Smack - Fix build error with bringup unconfigured
sign-file: Document dependency on OpenSSL devel libraries
PKCS#7: Appropriately restrict authenticated attributes and content type
KEYS: Add a name for PKEY_ID_PKCS7
PKCS#7: Improve and export the X.509 ASN.1 time object decoder
modsign: Use extract-cert to process CONFIG_SYSTEM_TRUSTED_KEYS
extract-cert: Cope with multiple X.509 certificates in a single file
sign-file: Generate CMS message as signature instead of PKCS#7
PKCS#7: Support CMS messages also [RFC5652]
X.509: Change recorded SKID & AKID to not include Subject or Issuer
PKCS#7: Check content type and versions
MAINTAINERS: The keyrings mailing list has moved
...
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...so "git status" doesn't nag us about them.
Cc: David Woodhouse <David.Woodhouse@intel.com>
Signed-off-by: Paul Gortmaker <paul.gortmaker@windriver.com>
Signed-off-by: David Howells <dhowells@redhat.com>
Signed-off-by: James Morris <james.l.morris@oracle.com>
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git://git.kernel.org/pub/scm/linux/kernel/git/dhowells/linux-fs into ra-next
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Since commit 1329e8cc69 ("modsign: Extract signing cert from
CONFIG_MODULE_SIG_KEY if needed"), the build system has carefully coped
with the signing key being specified as a relative path in either the
source or or the build trees.
However, the actual signing of modules has not worked if the filename
is relative to the source tree.
Fix that by moving the config_filename helper into scripts/Kbuild.include
so that it can be used from elsewhere, and then using it in the top-level
Makefile to find the signing key file.
Kill the intermediate $(MODPUBKEY) and $(MODSECKEY) variables too, while
we're at it. There's no need for them.
Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
Signed-off-by: David Howells <dhowells@redhat.com>
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This fixes the compilation of policy generated by mdp with the recent
version of checkpolicy.
Signed-off-by: Laurent Bigonville <bigon@bigon.be>
Acked-by: Stephen Smalley <sds@tycho.nsa.gov>
Signed-off-by: Paul Moore <pmoore@redhat.com>
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Fix the following warning:
scripts/sign-file.c: In function ‘main’:
scripts/sign-file.c:188: warning: value computed is not used
whereby the result of BIO_ctrl() is cast inside of BIO_reset() to an
integer of a different size - which we're not checking but probably should.
Reported-by: James Morris <jmorris@namei.org>
Signed-off-by: David Howells <dhowells@redhat.com>
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A PKCS#7 or CMS message can have per-signature authenticated attributes
that are digested as a lump and signed by the authorising key for that
signature. If such attributes exist, the content digest isn't itself
signed, but rather it is included in a special authattr which then
contributes to the signature.
Further, we already require the master message content type to be
pkcs7_signedData - but there's also a separate content type for the data
itself within the SignedData object and this must be repeated inside the
authattrs for each signer [RFC2315 9.2, RFC5652 11.1].
We should really validate the authattrs if they exist or forbid them
entirely as appropriate. To this end:
(1) Alter the PKCS#7 parser to reject any message that has more than one
signature where at least one signature has authattrs and at least one
that does not.
(2) Validate authattrs if they are present and strongly restrict them.
Only the following authattrs are permitted and all others are
rejected:
(a) contentType. This is checked to be an OID that matches the
content type in the SignedData object.
(b) messageDigest. This must match the crypto digest of the data.
(c) signingTime. If present, we check that this is a valid, parseable
UTCTime or GeneralTime and that the date it encodes fits within
the validity window of the matching X.509 cert.
(d) S/MIME capabilities. We don't check the contents.
(e) Authenticode SP Opus Info. We don't check the contents.
(f) Authenticode Statement Type. We don't check the contents.
The message is rejected if (a) or (b) are missing. If the message is
an Authenticode type, the message is rejected if (e) is missing; if
not Authenticode, the message is rejected if (d) - (f) are present.
The S/MIME capabilities authattr (d) unfortunately has to be allowed
to support kernels already signed by the pesign program. This only
affects kexec. sign-file suppresses them (CMS_NOSMIMECAP).
The message is also rejected if an authattr is given more than once or
if it contains more than one element in its set of values.
(3) Add a parameter to pkcs7_verify() to select one of the following
restrictions and pass in the appropriate option from the callers:
(*) VERIFYING_MODULE_SIGNATURE
This requires that the SignedData content type be pkcs7-data and
forbids authattrs. sign-file sets CMS_NOATTR. We could be more
flexible and permit authattrs optionally, but only permit minimal
content.
(*) VERIFYING_FIRMWARE_SIGNATURE
This requires that the SignedData content type be pkcs7-data and
requires authattrs. In future, this will require an attribute
holding the target firmware name in addition to the minimal set.
(*) VERIFYING_UNSPECIFIED_SIGNATURE
This requires that the SignedData content type be pkcs7-data but
allows either no authattrs or only permits the minimal set.
(*) VERIFYING_KEXEC_PE_SIGNATURE
This only supports the Authenticode SPC_INDIRECT_DATA content type
and requires at least an SpcSpOpusInfo authattr in addition to the
minimal set. It also permits an SPC_STATEMENT_TYPE authattr (and
an S/MIME capabilities authattr because the pesign program doesn't
remove these).
(*) VERIFYING_KEY_SIGNATURE
(*) VERIFYING_KEY_SELF_SIGNATURE
These are invalid in this context but are included for later use
when limiting the use of X.509 certs.
(4) The pkcs7_test key type is given a module parameter to select between
the above options for testing purposes. For example:
echo 1 >/sys/module/pkcs7_test_key/parameters/usage
keyctl padd pkcs7_test foo @s </tmp/stuff.pkcs7
will attempt to check the signature on stuff.pkcs7 as if it contains a
firmware blob (1 being VERIFYING_FIRMWARE_SIGNATURE).
Suggested-by: Andy Lutomirski <luto@kernel.org>
Signed-off-by: David Howells <dhowells@redhat.com>
Reviewed-by: Marcel Holtmann <marcel@holtmann.org>
Reviewed-by: David Woodhouse <David.Woodhouse@intel.com>
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Fix up the dependencies somewhat too, while we're at it.
Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
Signed-off-by: David Howells <dhowells@redhat.com>
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This is not required for the module signing key, although it doesn't do any
harm — it just means that any additional certs in the PEM file are also
trusted by the kernel.
But it does allow us to use the extract-cert tool for processing the extra
certs from CONFIG_SYSTEM_TRUSTED_KEYS, instead of that horrid awk|base64
hack.
Also cope with being invoked with no input file, creating an empty output
file as a result.
Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
Signed-off-by: David Howells <dhowells@redhat.com>
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Make sign-file use the OpenSSL CMS routines to generate a message to be
used as the signature blob instead of the PKCS#7 routines. This allows us
to change how the matching X.509 certificate is selected. With PKCS#7 the
only option is to match on the serial number and issuer fields of an X.509
certificate; with CMS, we also have the option of matching by subjectKeyId
extension. The new behaviour is selected with the "-k" flag.
Without the -k flag specified, the output is pretty much identical to the
PKCS#7 output.
Whilst we're at it, don't include the S/MIME capability list in the message
as it's irrelevant to us.
Signed-off-by: David Howells <dhowells@redhat.com>
Reviewed-By: David Woodhouse <David.Woodhouse@intel.com
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Where an external PEM file or PKCS#11 URI is given, we can get the cert
from it for ourselves instead of making the user drop signing_key.x509
in place for us.
Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
Signed-off-by: David Howells <dhowells@redhat.com>
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This is only the key; the corresponding *cert* still needs to be in
$(topdir)/signing_key.x509. And there's no way to actually use this
from the build system yet.
Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
Signed-off-by: David Howells <dhowells@redhat.com>
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We don't want this in the Kconfig since it might then get exposed in
/proc/config.gz. So make it a parameter to Kbuild instead. This also
means we don't have to jump through hoops to strip quotes from it, as
we would if it was a config option.
Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
Signed-off-by: David Howells <dhowells@redhat.com>
Reviewed-by: Mimi Zohar <zohar@linux.vnet.ibm.com>
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Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
Signed-off-by: David Howells <dhowells@redhat.com>
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Make the -d option (which currently isn't actually wired to anything) write
out the PKCS#7 message as per the -p option and then exit without either
modifying the source or writing out a compound file of the source, signature
and metadata.
This will be useful when firmware signature support is added
upstream as firmware will be left intact, and we'll only require
the signature file. The descriptor is implicit by file extension
and the file's own size.
Signed-off-by: Luis R. Rodriguez <mcgrof@suse.com>
Signed-off-by: David Howells <dhowells@redhat.com>
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Move to using PKCS#7 messages as module signatures because:
(1) We have to be able to support the use of X.509 certificates that don't
have a subjKeyId set. We're currently relying on this to look up the
X.509 certificate in the trusted keyring list.
(2) PKCS#7 message signed information blocks have a field that supplies the
data required to match with the X.509 certificate that signed it.
(3) The PKCS#7 certificate carries fields that specify the digest algorithm
used to generate the signature in a standardised way and the X.509
certificates specify the public key algorithm in a standardised way - so
we don't need our own methods of specifying these.
(4) We now have PKCS#7 message support in the kernel for signed kexec purposes
and we can make use of this.
To make this work, the old sign-file script has been replaced with a program
that needs compiling in a previous patch. The rules to build it are added
here.
Signed-off-by: David Howells <dhowells@redhat.com>
Tested-by: Vivek Goyal <vgoyal@redhat.com>
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Provide a utility that:
(1) Digests a module using the specified hash algorithm (typically sha256).
[The digest can be dumped into a file by passing the '-d' flag]
(2) Generates a PKCS#7 message that:
(a) Has detached data (ie. the module content).
(b) Is signed with the specified private key.
(c) Refers to the specified X.509 certificate.
(d) Has an empty X.509 certificate list.
[The PKCS#7 message can be dumped into a file by passing the '-p' flag]
(3) Generates a signed module by concatenating the old module, the PKCS#7
message, a descriptor and a magic string. The descriptor contains the
size of the PKCS#7 message and indicates the id_type as PKEY_ID_PKCS7.
(4) Either writes the signed module to the specified destination or renames
it over the source module.
This allows module signing to reuse the PKCS#7 handling code that was added
for PE file parsing for signed kexec.
Note that the utility is written in C and must be linked against the OpenSSL
crypto library.
Note further that I have temporarily dropped support for handling externally
created signatures until we can work out the best way to do those. Hopefully,
whoever creates the signature can give me a PKCS#7 certificate.
Signed-off-by: David Howells <dhowells@redhat.com>
Tested-by: Vivek Goyal <vgoyal@redhat.com>
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Copy string names to tokens in ASN.1 compiler rather than storing a pointer
into the source text. This means we don't have to use "%*.*s" all over the
place.
Signed-off-by: David Howells <dhowells@redhat.com>
Reviewed-by: David Woodhouse <David.Woodhouse@intel.com>
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Add an ASN.1 compiler option to dump the element tree to stdout.
Signed-off-by: David Howells <dhowells@redhat.com>
Reviewed-By: David Woodhouse <David.Woodhouse@intel.com>
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An ANY object in an ASN.1 grammar that is marked OPTIONAL should be skipped
if there is no more data to be had.
This can be tested by editing X.509 certificates or PKCS#7 messages to
remove the NULL from subobjects that look like the following:
SEQUENCE {
OBJECT(2a864886f70d01010b);
NULL();
}
This is an algorithm identifier plus an optional parameter.
The modified DER can be passed to one of:
keyctl padd asymmetric "" @s </tmp/modified.x509
keyctl padd pkcs7_test foo @s </tmp/modified.pkcs7
It should work okay with the patch and produce EBADMSG without.
Signed-off-by: David Howells <dhowells@redhat.com>
Tested-by: Marcel Holtmann <marcel@holtmann.org>
Reviewed-by: David Woodhouse <David.Woodhouse@intel.com>
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In an ASN.1 description where there is a CHOICE construct that contains
elements with IMPLICIT tags that refer to constructed types, actions to be
taken on those elements should be conditional on the corresponding element
actually being matched. Currently, however, such actions are performed
unconditionally in the middle of processing the CHOICE.
For example, look at elements 'b' and 'e' here:
A ::= SEQUENCE {
CHOICE {
b [0] IMPLICIT B ({ do_XXXXXXXXXXXX_b }),
c [1] EXPLICIT C ({ do_XXXXXXXXXXXX_c }),
d [2] EXPLICIT B ({ do_XXXXXXXXXXXX_d }),
e [3] IMPLICIT C ({ do_XXXXXXXXXXXX_e }),
f [4] IMPLICIT INTEGER ({ do_XXXXXXXXXXXX_f })
}
} ({ do_XXXXXXXXXXXX_A })
B ::= SET OF OBJECT IDENTIFIER ({ do_XXXXXXXXXXXX_oid })
C ::= SET OF INTEGER ({ do_XXXXXXXXXXXX_int })
They each have an action (do_XXXXXXXXXXXX_b and do_XXXXXXXXXXXX_e) that
should only be processed if that element is matched.
The problem is that there's no easy place to hang the action off in the
subclause (type B for element 'b' and type C for element 'e') because
subclause opcode sequences can be shared.
To fix this, introduce a conditional action opcode(ASN1_OP_MAYBE_ACT) that
the decoder only processes if the preceding match was successful. This can
be seen in an excerpt from the output of the fixed ASN.1 compiler for the
above ASN.1 description:
[ 13] = ASN1_OP_COND_MATCH_JUMP_OR_SKIP, // e
[ 14] = _tagn(CONT, CONS, 3),
[ 15] = _jump_target(45), // --> C
[ 16] = ASN1_OP_MAYBE_ACT,
[ 17] = _action(ACT_do_XXXXXXXXXXXX_e),
In this, if the op at [13] is matched (ie. element 'e' above) then the
action at [16] will be performed. However, if the op at [13] doesn't match
or is skipped because it is conditional and some previous op matched, then
the action at [16] will be ignored.
Note that to make this work in the decoder, the ASN1_OP_RETURN op must set
the flag to indicate that a match happened. This is necessary because the
_jump_target() seen above introduces a subclause (in this case an object of
type 'C') which is likely to alter the flag. Setting the flag here is okay
because to process a subclause, a match must have happened and caused a
jump.
This cannot be tested with the code as it stands, but rather affects future
code.
Signed-off-by: David Howells <dhowells@redhat.com>
Reviewed-by: David Woodhouse <David.Woodhouse@intel.com>
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Fix the handling of CHOICE types in the ASN.1 compiler to make SEQUENCE and
SET elements in a CHOICE be correctly rendered as skippable and conditional
as appropriate.
For example, in the following ASN.1:
Foo ::= SEQUENCE { w1 INTEGER, w2 Bar, w3 OBJECT IDENTIFIER }
Bar ::= CHOICE {
x1 Seq1,
x2 [0] IMPLICIT OCTET STRING,
x3 Seq2,
x4 SET OF INTEGER
}
Seq1 ::= SEQUENCE { y1 INTEGER, y2 INTEGER, y3 INTEGER }
Seq2 ::= SEQUENCE { z1 BOOLEAN, z2 BOOLEAN, z3 BOOLEAN }
the output in foo.c generated by:
./scripts/asn1_compiler foo.asn1 foo.c foo.h
included:
// Bar
// Seq1
[ 4] = ASN1_OP_MATCH,
[ 5] = _tag(UNIV, CONS, SEQ),
...
[ 13] = ASN1_OP_COND_MATCH_OR_SKIP, // x2
[ 14] = _tagn(CONT, PRIM, 0),
// Seq2
[ 15] = ASN1_OP_MATCH,
[ 16] = _tag(UNIV, CONS, SEQ),
...
[ 24] = ASN1_OP_COND_MATCH_JUMP_OR_SKIP, // x4
[ 25] = _tag(UNIV, CONS, SET),
...
[ 27] = ASN1_OP_COND_FAIL,
as a result of the CHOICE - but this is wrong on lines 4 and 15 because
both of these should be skippable (one and only one of the four can be
picked) and the one on line 15 should also be conditional so that it is
ignored if anything before it matches.
After the patch, it looks like:
// Bar
// Seq1
[ 4] = ASN1_OP_MATCH_JUMP_OR_SKIP, // x1
[ 5] = _tag(UNIV, CONS, SEQ),
...
[ 7] = ASN1_OP_COND_MATCH_OR_SKIP, // x2
[ 8] = _tagn(CONT, PRIM, 0),
// Seq2
[ 9] = ASN1_OP_COND_MATCH_JUMP_OR_SKIP, // x3
[ 10] = _tag(UNIV, CONS, SEQ),
...
[ 12] = ASN1_OP_COND_MATCH_JUMP_OR_SKIP, // x4
[ 13] = _tag(UNIV, CONS, SET),
...
[ 15] = ASN1_OP_COND_FAIL,
where all four options are skippable and the second, third and fourth are
all conditional, as is the backstop at the end.
This hasn't been a problem so far because in the ASN.1 specs we have are
either using primitives or are using SET OF and SEQUENCE OF which are
handled correctly.
Whilst we're at it, also make sure that element labels get included in
comments in the output for elements that have complex types.
This cannot be tested with the code as it stands, but rather affects future
code.
Signed-off-by: David Howells <dhowells@redhat.com>
Reviewed-By: David Woodhouse <David.Woodhouse@intel.com>
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I wrote a small script to show word-pair from all linux spelling-typo
commits, and get following result by sort | uniq -c:
181 occured -> occurred
78 transfered -> transferred
67 recieved -> received
65 dependant -> dependent
58 wether -> whether
56 accomodate -> accommodate
54 occured -> occurred
51 recieve -> receive
47 cant -> can't
40 sucessfully -> successfully
...
Some of them are not in spelling.txt, this patch adds the most common
word-pairs into spelling.txt.
Signed-off-by: Zhao Lei <zhaolei@cn.fujitsu.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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Fix the stack decoder for the ARM architecture.
An ARM stack is designed as :
[ 81.547704] [<c023eb04>] (bucket_find_contain) from [<c023ec88>] (check_sync+0x40/0x4f8)
[ 81.559668] [<c023ec88>] (check_sync) from [<c023f8c4>] (debug_dma_sync_sg_for_cpu+0x128/0x194)
[ 81.571583] [<c023f8c4>] (debug_dma_sync_sg_for_cpu) from [<c0327dec>] (__videobuf_s
The current script doesn't expect the symbols to be bound by
parenthesis, and triggers the following errors :
awk: cmd. line:1: error: Unmatched ( or \(: / (check_sync$/
[ 81.547704] (bucket_find_contain) from (check_sync+0x40/0x4f8)
Fix it by chopping starting and ending parenthesis from the each symbol
name.
As a side note, this probably comes from the function
dump_backtrace_entry(), which is implemented differently for each
architecture. That makes a single decoding script a bit a challenge.
Signed-off-by: Robert Jarzmik <robert.jarzmik@free.fr>
Cc: Sasha Levin <sasha.levin@oracle.com>
Cc: Russell King <rmk+kernel@arm.linux.org.uk>
Cc: Michal Marek <mmarek@suse.cz>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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If indent is not found, bail out immediately instead of spitting random
shell script error messages.
Signed-off-by: Jean Delvare <jdelvare@suse.de>
Cc: Joe Perches <joe@perches.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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Editors like emacs and vi recognize a number of error message formats.
The format used by the kerneldoc tool is not recognized by emacs.
Change the kerneldoc error message format to the GNU style such that the
emacs prev-error and next-error commands can be used to navigate through
kerneldoc error messages. For more information about the GNU error
message format, see also
https://www.gnu.org/prep/standards/html_node/Errors.html.
This patch has been generated via the following sed command:
sed -i.orig 's/Error(\${file}:\$.):/\${file}:\$.: error:/g;s/Warning(\${file}:\$.):/\${file}:\$.: warning:/g;s/Warning(\${file}):/\${file}:1: warning:/g;s/Info(\${file}:\$.):/\${file}:\$.: info:/g' scripts/kernel-doc
Signed-off-by: Bart Van Assche <bart.vanassche@sandisk.com>
Cc: Johannes Berg <johannes.berg@intel.com>
Acked-by: Randy Dunlap <rdunlap@infradead.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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I just did a spelling mistake of uninitialized and wrote that as
unintialized. Fortunately I noticed it in my final review.
Signed-off-by: Sudip Mukherjee <sudip@vectorindia.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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misspelled words for check:-
chcek
chck
cehck
I myself did these spell mistakes in changelog for patches, Thus
suggesting to add in spelling.txt, so that checkpatch.pl warns it
earlier. References:-
./arch/powerpc/kernel/exceptions-64e.S:456: . . . make sure you chcek
https://lkml.org/lkml/2015/6/25/289
./arch/x86/mm/pageattr.c:1368: * No need to cehck in that case
[akpm@linux-foundation.org: add whcih->which, whcih I always get wrong]
Signed-off-by: Maninder Singh <maninder1.s@samsung.com>
Acked-by: Kees Cook <keescook@chromium.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull locking and atomic updates from Ingo Molnar:
"Main changes in this cycle are:
- Extend atomic primitives with coherent logic op primitives
(atomic_{or,and,xor}()) and deprecate the old partial APIs
(atomic_{set,clear}_mask())
The old ops were incoherent with incompatible signatures across
architectures and with incomplete support. Now every architecture
supports the primitives consistently (by Peter Zijlstra)
- Generic support for 'relaxed atomics':
- _acquire/release/relaxed() flavours of xchg(), cmpxchg() and {add,sub}_return()
- atomic_read_acquire()
- atomic_set_release()
This came out of porting qwrlock code to arm64 (by Will Deacon)
- Clean up the fragile static_key APIs that were causing repeat bugs,
by introducing a new one:
DEFINE_STATIC_KEY_TRUE(name);
DEFINE_STATIC_KEY_FALSE(name);
which define a key of different types with an initial true/false
value.
Then allow:
static_branch_likely()
static_branch_unlikely()
to take a key of either type and emit the right instruction for the
case. To be able to know the 'type' of the static key we encode it
in the jump entry (by Peter Zijlstra)
- Static key self-tests (by Jason Baron)
- qrwlock optimizations (by Waiman Long)
- small futex enhancements (by Davidlohr Bueso)
- ... and misc other changes"
* 'locking-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: (63 commits)
jump_label/x86: Work around asm build bug on older/backported GCCs
locking, ARM, atomics: Define our SMP atomics in terms of _relaxed() operations
locking, include/llist: Use linux/atomic.h instead of asm/cmpxchg.h
locking/qrwlock: Make use of _{acquire|release|relaxed}() atomics
locking/qrwlock: Implement queue_write_unlock() using smp_store_release()
locking/lockref: Remove homebrew cmpxchg64_relaxed() macro definition
locking, asm-generic: Add _{relaxed|acquire|release}() variants for 'atomic_long_t'
locking, asm-generic: Rework atomic-long.h to avoid bulk code duplication
locking/atomics: Add _{acquire|release|relaxed}() variants of some atomic operations
locking, compiler.h: Cast away attributes in the WRITE_ONCE() magic
locking/static_keys: Make verify_keys() static
jump label, locking/static_keys: Update docs
locking/static_keys: Provide a selftest
jump_label: Provide a self-test
s390/uaccess, locking/static_keys: employ static_branch_likely()
x86, tsc, locking/static_keys: Employ static_branch_likely()
locking/static_keys: Add selftest
locking/static_keys: Add a new static_key interface
locking/static_keys: Rework update logic
locking/static_keys: Add static_key_{en,dis}able() helpers
...
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fixes before applying new changes
Signed-off-by: Ingo Molnar <mingo@kernel.org>
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No one uses this anymore, and this is not the first time the
idea of replacing it with a (now possible) userspace side.
Lock stealing logic was removed long ago in when the lock
was granted to the highest prio.
Signed-off-by: Davidlohr Bueso <dbueso@suse.de>
Cc: Darren Hart <dvhart@infradead.org>
Cc: Steven Rostedt <rostedt@goodmis.org>
Cc: Mike Galbraith <umgwanakikbuti@gmail.com>
Cc: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
Cc: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Cc: Davidlohr Bueso <dave@stgolabs.net>
Cc: Peter Zijlstra <peterz@infradead.org>
Link: http://lkml.kernel.org/r/1435782588-4177-2-git-send-email-dave@stgolabs.net
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
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git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull RCU updates from Ingo Molnar:
"The main RCU changes in this cycle are:
- the combination of tree geometry-initialization simplifications and
OS-jitter-reduction changes to expedited grace periods. These two
are stacked due to the large number of conflicts that would
otherwise result.
- privatize smp_mb__after_unlock_lock().
This commit moves the definition of smp_mb__after_unlock_lock() to
kernel/rcu/tree.h, in recognition of the fact that RCU is the only
thing using this, that nothing else is likely to use it, and that
it is likely to go away completely.
- documentation updates.
- torture-test updates.
- misc fixes"
* 'core-rcu-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: (60 commits)
rcu,locking: Privatize smp_mb__after_unlock_lock()
rcu: Silence lockdep false positive for expedited grace periods
rcu: Don't disable CPU hotplug during OOM notifiers
scripts: Make checkpatch.pl warn on expedited RCU grace periods
rcu: Update MAINTAINERS entry
rcu: Clarify CONFIG_RCU_EQS_DEBUG help text
rcu: Fix backwards RCU_LOCKDEP_WARN() in synchronize_rcu_tasks()
rcu: Rename rcu_lockdep_assert() to RCU_LOCKDEP_WARN()
rcu: Make rcu_is_watching() really notrace
cpu: Wait for RCU grace periods concurrently
rcu: Create a synchronize_rcu_mult()
rcu: Fix obsolete priority-boosting comment
rcu: Use WRITE_ONCE in RCU_INIT_POINTER
rcu: Hide RCU_NOCB_CPU behind RCU_EXPERT
rcu: Add RCU-sched flavors of get-state and cond-sync
rcu: Add fastpath bypassing funnel locking
rcu: Rename RCU_GP_DONE_FQS to RCU_GP_DOING_FQS
rcu: Pull out wait_event*() condition into helper function
documentation: Describe new expedited stall warnings
rcu: Add stall warnings to synchronize_sched_expedited()
...
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git://git.kernel.org/pub/scm/linux/kernel/git/paulmck/linux-rcu into core/rcu
Pull RCU changes from Paul E. McKenney:
- The combination of tree geometry-initialization simplifications
and OS-jitter-reduction changes to expedited grace periods.
These two are stacked due to the large number of conflicts
that would otherwise result.
[ With one addition, a temporary commit to silence a lockdep false
positive. Additional changes to the expedited grace-period
primitives (queued for 4.4) remove the cause of this false
positive, and therefore include a revert of this temporary commit. ]
- Documentation updates.
- Torture-test updates.
- Miscellaneous fixes.
Signed-off-by: Ingo Molnar <mingo@kernel.org>
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The synchronize_rcu_expedited() and synchronize_sched_expedited()
expedited-grace-period primitives induce OS jitter, which can degrade
real-time response. This commit therefore adds a checkpatch.pl warning
on any patch adding them.
Note that this patch does not warn on synchronize_srcu_expedited()
because it does not induce OS jitter, courtesy of its otherwise
much-maligned read-side memory barriers.
Signed-off-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
Cc: Andy Whitcroft <apw@canonical.com>
Cc: Joe Perches <joe@perches.com>
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Pull documentation updates from Jonathan Corbet:
"There's been a fair amount going on in the docs tree this time around,
including:
- Support for reproducible document builds, from Ben Hutchings and
company.
- The ability to automatically generate cross-reference links within
a single DocBook book and embedded descriptions for large
structures. From Danilo Cesar Lemes de Paula.
- A new document on how to add a system call from David Drysdale.
- Chameleon bus documentation from Johannes Thumshirn.
...plus the usual collection of improvements, typo fixes, and more"
* tag 'docs-for-linus' of git://git.lwn.net/linux-2.6: (39 commits)
Documentation, add kernel-parameters.txt entry for dis_ucode_ldr
Documentation/x86: Rename IRQSTACKSIZE to IRQ_STACK_SIZE
Documentation/Intel-IOMMU.txt: Modify definition of DRHD
docs: update HOWTO for 3.x -> 4.x versioning
kernel-doc: ignore unneeded attribute information
scripts/kernel-doc: Adding cross-reference links to html documentation.
DocBook: Fix non-determinstic installation of duplicate man pages
Documentation: minor typo fix in mailbox.txt
Documentation: describe how to add a system call
doc: Add more workqueue functions to the documentation
ARM: keystone: add documentation for SoCs and EVMs
scripts/kernel-doc Allow struct arguments documentation in struct body
SubmittingPatches: remove stray quote character
Revert "DocBook: Avoid building man pages repeatedly and inconsistently"
Documentation: Minor changes to men-chameleon-bus.txt
Doc: fix trivial typo in SubmittingPatches
MAINTAINERS: Direct Documentation/DocBook/media properly
Documentation: installed man pages don't need to be executable
fix Evolution submenu name in email-clients.txt
Documentation: Add MCB documentation
...
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The kernel-doc script gets confused by __attribute__(()) strings in
structures, so just clean the out. Also ignore the CRYPTO_MINALIGN_ATTR
macro used in the crypto subsystem.
Signed-off-by: Jonathan Corbet <corbet@lwn.net>
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Functions, Structs and Parameters definitions on kernel documentation
are pure cosmetic, it only highlights the element.
To ease the navigation in the documentation we should use <links> inside
those tags so readers can easily jump between methods directly.
This was discussed in 2014[1] and is implemented by getting a list
of <refentries> from the DocBook XML to generate a database. Then it looks
for <function>,<structnames> and <paramdef> tags that matches the ones in
the database. As it only links existent references, no broken links are
added.
[1] - lists.freedesktop.org/archives/dri-devel/2014-August/065404.html
Signed-off-by: Danilo Cesar Lemes de Paula <danilo.cesar@collabora.co.uk>
Cc: Randy Dunlap <rdunlap@infradead.org>
Cc: Daniel Vetter <daniel.vetter@ffwll.ch>
Cc: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Cc: Herbert Xu <herbert@gondor.apana.org.au>
Cc: Stephan Mueller <smueller@chronox.de>
Cc: Michal Marek <mmarek@suse.cz>
Cc: intel-gfx <intel-gfx@lists.freedesktop.org>
Cc: dri-devel <dri-devel@lists.freedesktop.org>
Signed-off-by: Jonathan Corbet <corbet@lwn.net>
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Describing arguments at top of a struct definition works fine
for small/medium size structs, but it definitely doesn't work well
for struct with a huge list of elements.
Keeping the arguments list inside the struct body makes it easier
to maintain the documentation.
ie:
/**
* struct my_struct - short description
* @a: first member
* @b: second member
*
* Longer description
*/
struct my_struct {
int a;
int b;
/**
* @c: This is longer description of C
*
* You can use paragraphs to describe arguments
* using this method.
*/
int c;
};
This patch allows the use of this kind of syntax. Only one argument
per comment and user can use how many paragraphs he needs. It should
start with /**, which is already being used by kernel-doc. If those
comment doesn't follow those rules, it will be ignored.
Signed-off-by: Danilo Cesar Lemes de Paula <danilo.cesar@collabora.co.uk>
Cc: Randy Dunlap <rdunlap@infradead.org>
Cc: Daniel Vetter <daniel.vetter@ffwll.ch>
Cc: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Cc: Jonathan Corbet <corbet@lwn.net>
Cc: Herbert Xu <herbert@gondor.apana.org.au>
Cc: Stephan Mueller <smueller@chronox.de>
Cc: Michal Marek <mmarek@suse.cz>
Cc: linux-kernel@vger.kernel.org
Cc: linux-doc@vger.kernel.org
Cc: intel-gfx <intel-gfx@lists.freedesktop.org>
Cc: dri-devel <dri-devel@lists.freedesktop.org>
Signed-off-by: Jonathan Corbet <corbet@lwn.net>
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Together with the preceding changes, this allows man pages to be built
reproducibly.
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
Signed-off-by: Jonathan Corbet <corbet@lwn.net>
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Regular expressions for highlights in kernel-doc are stored in a Perl
hash. These hashes are ordered differently for each Perl run. This will
prevent kernel-doc to behave deterministically when parsing “@foo()” as
in some runs it will be interpreted as a parameter and in the others it
will be interpreted as a function.
We now sort the %highlights hash to get the same behavior on every run.
Signed-off-by: Jérémy Bobbio <lunar@debian.org>
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
Signed-off-by: Jonathan Corbet <corbet@lwn.net>
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git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/char-misc
Pull char/misc driver patches from Greg KH:
"Here's the "big" char/misc driver update for 4.3-rc1.
Not much really interesting here, just a number of little changes all
over the place, and some nice consolidation of the nvmem drivers to a
common framework. As usual, the mei drivers stand out as the largest
"churn" to handle new devices and features in their hardware.
All have been in linux-next for a while with no issues"
* tag 'char-misc-4.3-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/char-misc: (136 commits)
auxdisplay: ks0108: initialize local parport variable
extcon: palmas: Fix build break due to devm_gpiod_get_optional API change
extcon: palmas: Support GPIO based USB ID detection
extcon: Fix signedness bugs about break error handling
extcon: Drop owner assignment from i2c_driver
extcon: arizona: Simplify pdata symantics for micd_dbtime
extcon: arizona: Declare 3-pole jack if we detect open circuit on mic
extcon: Add exception handling to prevent the NULL pointer access
extcon: arizona: Ensure variables are set for headphone detection
extcon: arizona: Use gpiod inteface to handle micd_pol_gpio gpio
extcon: arizona: Add basic microphone detection DT/ACPI bindings
extcon: arizona: Update to use the new device properties API
extcon: palmas: Remove the mutually_exclusive array
extcon: Remove optional print_state() function pointer of struct extcon_dev
extcon: Remove duplicate header file in extcon.h
extcon: max77843: Clear IRQ bits state before request IRQ
toshiba laptop: replace ioremap_cache with ioremap
misc: eeprom: max6875: clean up max6875_read()
misc: eeprom: clean up eeprom_read()
misc: eeprom: 93xx46: clean up eeprom_93xx46_bin_read/write
...
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Until now, checkkonfigsymbols.py did not check default statements for
references on missing Kconfig symbols (i.e., undefined Kconfig options).
Hence, add support to parse and check the Kconfig default statement.
Signed-off-by: Valentin Rothberg <valentinrothberg@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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Color output to make it more readable. Symbols will be printed yellow,
relevant commits (see --find) red.
Signed-off-by: Valentin Rothberg <valentinrothberg@gmail.com>
Acked-by: Stefan Hengelein <stefan.hengelein@fau.de>
Acked-by: Andreas Ruprecht <andreas.ruprecht@fau.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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Add option -f/--find to find relevant commits when using the --diff
option. --find is useful in case a user wants to check commits that
potentially cause a Kconfig symbol to be missing. This is done via 'git
log -G $SYMBOL' (i.e., to get a list of commits that change $SYMBOL).
The relevant commits are printed below the "SYMBOL\tFILES" line,
followed by an empty line to increase readability.
Signed-off-by: Valentin Rothberg <valentinrothberg@gmail.com>
Acked-by: Stefan Hengelein <stefan.hengelein@fau.de>
Acked-by: Andreas Ruprecht <andreas.ruprecht@fau.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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In kbuild it is allowed to define objects in files named "Makefile"
and "Kbuild".
Currently localmodconfig reads objects only from "Makefile"s and misses
modules like nouveau.
Link: http://lkml.kernel.org/r/1437948415-16290-1-git-send-email-richard@nod.at
Cc: stable@vger.kernel.org
Reported-and-tested-by: Leonidas Spyropoulos <artafinde@gmail.com>
Signed-off-by: Richard Weinberger <richard@nod.at>
Signed-off-by: Steven Rostedt <rostedt@goodmis.org>
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Changes in ("checkpatch: categorize some long line length checks")
now erroneously reports long line defects in patch context.
Fix it.
Signed-off-by: Joe Perches <joe@perches.com>
Reported-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm
Pull power management and ACPI updates from Rafael Wysocki:
"These are fixes on top of the previous PM+ACPI pull requests
(including one fix for a 4.1 regression) and two commits adding
_CLS-based device enumeration support to the ACPI core and the ATA
subsystem that waited for the latest ACPICA changes to be merged.
Specifics:
- Fix for an ACPI resources management regression introduced during
the 4.1 cycle (that unfortunately went into -stable) effectively
reverting the bad commit along with the recent fixups on top of it
and using an alternative approach to address the underlying issue
(Rafael J Wysocki).
- Fix for a memory leak and an incorrect return value in an error
code path in the ACPI LPSS (Low-Power Subsystem) driver (Rafael J
Wysocki).
- Fix for a leftover dangling pointer in an error code path in the
new wakeup IRQ support code (Rafael J Wysocki).
- Fix to prevent infinite loops (due to errors in other places) from
happening in the core generic PM domains support code (Geert
Uytterhoeven).
- Hibernation documentation update/clarification (Uwe Geuder).
- Support for _CLS-based device enumeration in the ACPI core and in
the ATA subsystem (Suravee Suthikulpanit)"
* tag 'pm+acpi-4.2-rc2' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm:
PM / wakeirq: Avoid setting power.wakeirq too hastily
ata: ahci_platform: Add ACPI _CLS matching
ACPI / scan: Add support for ACPI _CLS device matching
PM / hibernate: clarify resume documentation
PM / Domains: Avoid infinite loops in attach/detach code
ACPI / LPSS: Fix up acpi_lpss_create_device()
ACPI / PNP: Reserve ACPI resources at the fs_initcall_sync stage
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Device drivers typically use ACPI _HIDs/_CIDs listed in struct device_driver
acpi_match_table to match devices. However, for generic drivers, we do not
want to list _HID for all supported devices. Also, certain classes of devices
do not have _CID (e.g. SATA, USB). Instead, we can leverage ACPI _CLS,
which specifies PCI-defined class code (i.e. base-class, subclass and
programming interface). This patch adds support for matching ACPI devices using
the _CLS method.
To support loadable module, current design uses _HID or _CID to match device's
modalias. With the new way of matching with _CLS this would requires modification
to the current ACPI modalias key to include _CLS. This patch appends PCI-defined
class-code to the existing ACPI modalias as following.
acpi:<HID>:<CID1>:<CID2>:..:<CIDn>:<bbsspp>:
E.g:
# cat /sys/devices/platform/AMDI0600:00/modalias
acpi:AMDI0600:010601:
where bb is th base-class code, ss is te sub-class code, and pp is the
programming interface code
Since there would not be _HID/_CID in the ACPI matching table of the driver,
this patch adds a field to acpi_device_id to specify the matching _CLS.
static const struct acpi_device_id ahci_acpi_match[] = {
{ ACPI_DEVICE_CLASS(PCI_CLASS_STORAGE_SATA_AHCI, 0xffffff) },
{},
};
In this case, the corresponded entry in modules.alias file would be:
alias acpi*:010601:* ahci_platform
Acked-by: Mika Westerberg <mika.westerberg@linux.intel.com>
Reviewed-by: Hanjun Guo <hanjun.guo@linaro.org>
Signed-off-by: Suravee Suthikulpanit <Suravee.Suthikulpanit@amd.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
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The tilegx and tilepro compilers use .coldtext for their unlikely
executed text section name, so an __attribute__((cold)) function
will (when compiled with higher optimization levels) land in
the .coldtext section.
Modify modpost to add .coldtext to the set of OTHER_TEXT_SECTIONS
so we don't get warnings about referencing such a section in an
__ex_table block, and then also modify arch/tile/lib/memcpy_user_64.c
so that it uses plain ".coldtext" instead of ".coldtext.memcpy".
The latter naming is a relic of an earlier use of -ffunction-sections,
which we no longer use by default.
Signed-off-by: Chris Metcalf <cmetcalf@ezchip.com>
Acked-by: Rusty Russell <rusty@rustcorp.com.au>
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