linux-toradex.git/fs/ecryptfs/keystore.c, branch v4.10 Linux kernel for Apalis and Colibri modules mm, fs: get rid of PAGE_CACHE_* and page_cache_{get,release} macros 2016-04-04T17:41:08+00:00 Kirill A. Shutemov kirill.shutemov@linux.intel.com 2016-04-01T12:29:47+00:00 09cbfeaf1a5a67bfb3201e0c83c810cecb2efa5a PAGE_CACHE_{SIZE,SHIFT,MASK,ALIGN} macros were introduced *long* time ago with promise that one day it will be possible to implement page cache with bigger chunks than PAGE_SIZE. This promise never materialized. And unlikely will. We have many places where PAGE_CACHE_SIZE assumed to be equal to PAGE_SIZE. And it's constant source of confusion on whether PAGE_CACHE_* or PAGE_* constant should be used in a particular case, especially on the border between fs and mm. Global switching to PAGE_CACHE_SIZE != PAGE_SIZE would cause to much breakage to be doable. Let's stop pretending that pages in page cache are special. They are not. The changes are pretty straight-forward: - <foo> << (PAGE_CACHE_SHIFT - PAGE_SHIFT) -> <foo>; - <foo> >> (PAGE_CACHE_SHIFT - PAGE_SHIFT) -> <foo>; - PAGE_CACHE_{SIZE,SHIFT,MASK,ALIGN} -> PAGE_{SIZE,SHIFT,MASK,ALIGN}; - page_cache_get() -> get_page(); - page_cache_release() -> put_page(); This patch contains automated changes generated with coccinelle using script below. For some reason, coccinelle doesn't patch header files. I've called spatch for them manually. The only adjustment after coccinelle is revert of changes to PAGE_CAHCE_ALIGN definition: we are going to drop it later. There are few places in the code where coccinelle didn't reach. I'll fix them manually in a separate patch. Comments and documentation also will be addressed with the separate patch. virtual patch @@ expression E; @@ - E << (PAGE_CACHE_SHIFT - PAGE_SHIFT) + E @@ expression E; @@ - E >> (PAGE_CACHE_SHIFT - PAGE_SHIFT) + E @@ @@ - PAGE_CACHE_SHIFT + PAGE_SHIFT @@ @@ - PAGE_CACHE_SIZE + PAGE_SIZE @@ @@ - PAGE_CACHE_MASK + PAGE_MASK @@ expression E; @@ - PAGE_CACHE_ALIGN(E) + PAGE_ALIGN(E) @@ expression E; @@ - page_cache_get(E) + get_page(E) @@ expression E; @@ - page_cache_release(E) + put_page(E) Signed-off-by: Kirill A. Shutemov <kirill.shutemov@linux.intel.com> Acked-by: Michal Hocko <mhocko@suse.com> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org> 
PAGE_CACHE_{SIZE,SHIFT,MASK,ALIGN} macros were introduced *long* time
ago with promise that one day it will be possible to implement page
cache with bigger chunks than PAGE_SIZE.

This promise never materialized.  And unlikely will.

We have many places where PAGE_CACHE_SIZE assumed to be equal to
PAGE_SIZE.  And it's constant source of confusion on whether
PAGE_CACHE_* or PAGE_* constant should be used in a particular case,
especially on the border between fs and mm.

Global switching to PAGE_CACHE_SIZE != PAGE_SIZE would cause to much
breakage to be doable.

Let's stop pretending that pages in page cache are special.  They are
not.

The changes are pretty straight-forward:

 - <foo> << (PAGE_CACHE_SHIFT - PAGE_SHIFT) -> <foo>;

 - <foo> >> (PAGE_CACHE_SHIFT - PAGE_SHIFT) -> <foo>;

 - PAGE_CACHE_{SIZE,SHIFT,MASK,ALIGN} -> PAGE_{SIZE,SHIFT,MASK,ALIGN};

 - page_cache_get() -> get_page();

 - page_cache_release() -> put_page();

This patch contains automated changes generated with coccinelle using
script below.  For some reason, coccinelle doesn't patch header files.
I've called spatch for them manually.

The only adjustment after coccinelle is revert of changes to
PAGE_CAHCE_ALIGN definition: we are going to drop it later.

There are few places in the code where coccinelle didn't reach.  I'll
fix them manually in a separate patch.  Comments and documentation also
will be addressed with the separate patch.

virtual patch

@@
expression E;
@@
- E << (PAGE_CACHE_SHIFT - PAGE_SHIFT)
+ E

@@
expression E;
@@
- E >> (PAGE_CACHE_SHIFT - PAGE_SHIFT)
+ E

@@
@@
- PAGE_CACHE_SHIFT
+ PAGE_SHIFT

@@
@@
- PAGE_CACHE_SIZE
+ PAGE_SIZE

@@
@@
- PAGE_CACHE_MASK
+ PAGE_MASK

@@
expression E;
@@
- PAGE_CACHE_ALIGN(E)
+ PAGE_ALIGN(E)

@@
expression E;
@@
- page_cache_get(E)
+ get_page(E)

@@
expression E;
@@
- page_cache_release(E)
+ put_page(E)

Signed-off-by: Kirill A. Shutemov <kirill.shutemov@linux.intel.com>
Acked-by: Michal Hocko <mhocko@suse.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
eCryptfs: Use skcipher and shash 2016-03-17T11:09:00+00:00 Herbert Xu herbert@gondor.apana.org.au 2016-03-16T09:06:01+00:00 d1558f4e95cb14b0fff5c0b839c15a21f7e8aed0 eCryptfs: Fix null pointer dereference on kzalloc error path The conversion to skcipher and shash added a couple of null pointer dereference bugs on the kzalloc failure path. This patch fixes them. Fixes: 3095e8e366b4 ("eCryptfs: Use skcipher and shash") Reported-by: Dan Carpenter <dan.carpenter@oracle.com> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au> 
eCryptfs: Fix null pointer dereference on kzalloc error path

The conversion to skcipher and shash added a couple of null pointer
dereference bugs on the kzalloc failure path.  This patch fixes them.

Fixes: 3095e8e366b4 ("eCryptfs: Use skcipher and shash")
Reported-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
eCryptfs: Use skcipher and shash 2016-01-27T12:36:18+00:00 Herbert Xu herbert@gondor.apana.org.au 2016-01-25T02:29:33+00:00 3095e8e366b471f3bcdbf21c9c72a45718ff8756 This patch replaces uses of ablkcipher and blkcipher with skcipher, and the long obsolete hash interface with shash. Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au> 
This patch replaces uses of ablkcipher and blkcipher with skcipher,
and the long obsolete hash interface with shash.

Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
eCryptfs: ensure copy to crypt_stat->cipher does not overrun 2015-02-25T01:23:28+00:00 Colin Ian King colin.king@canonical.com 2015-02-23T11:34:10+00:00 2a559a8bdeae853b6a8abb477c88875e1d4de591 The patch 237fead61998: "[PATCH] ecryptfs: fs/Makefile and fs/Kconfig" from Oct 4, 2006, leads to the following static checker warning: fs/ecryptfs/crypto.c:846 ecryptfs_new_file_context() error: off-by-one overflow 'crypt_stat->cipher' size 32. rl = '0-32' There is a mismatch between the size of ecryptfs_crypt_stat.cipher and ecryptfs_mount_crypt_stat.global_default_cipher_name causing the copy of the cipher name to cause a off-by-one string copy error. This fix ensures the space reserved for this string is the same size including the trailing zero at the end throughout ecryptfs. This fix avoids increasing the size of ecryptfs_crypt_stat.cipher and also ecryptfs_parse_tag_70_packet_silly_stack.cipher_string and instead reduces the of ECRYPTFS_MAX_CIPHER_NAME_SIZE to 31 and includes the + 1 for the end of string terminator. NOTE: An overflow is not possible in practice since the value copied into global_default_cipher_name is validated by ecryptfs_code_for_cipher_string() at mount time. None of the allowed cipher strings are long enough to cause the potential buffer overflow fixed by this patch. Signed-off-by: Colin Ian King <colin.king@canonical.com> Reported-by: Dan Carpenter <dan.carpenter@oracle.com> [tyhicks: Added the NOTE about the overflow not being triggerable] Signed-off-by: Tyler Hicks <tyhicks@canonical.com> 
The patch 237fead61998: "[PATCH] ecryptfs: fs/Makefile and
fs/Kconfig" from Oct 4, 2006, leads to the following static checker
warning:

  fs/ecryptfs/crypto.c:846 ecryptfs_new_file_context()
  error: off-by-one overflow 'crypt_stat->cipher' size 32.  rl = '0-32'

There is a mismatch between the size of ecryptfs_crypt_stat.cipher
and ecryptfs_mount_crypt_stat.global_default_cipher_name causing the
copy of the cipher name to cause a off-by-one string copy error. This
fix ensures the space reserved for this string is the same size including
the trailing zero at the end throughout ecryptfs.

This fix avoids increasing the size of ecryptfs_crypt_stat.cipher
and also ecryptfs_parse_tag_70_packet_silly_stack.cipher_string and instead
reduces the of ECRYPTFS_MAX_CIPHER_NAME_SIZE to 31 and includes the + 1 for
the end of string terminator.

NOTE: An overflow is not possible in practice since the value copied
into global_default_cipher_name is validated by
ecryptfs_code_for_cipher_string() at mount time. None of the allowed
cipher strings are long enough to cause the potential buffer overflow
fixed by this patch.

Signed-off-by: Colin Ian King <colin.king@canonical.com>
Reported-by: Dan Carpenter <dan.carpenter@oracle.com>
[tyhicks: Added the NOTE about the overflow not being triggerable]
Signed-off-by: Tyler Hicks <tyhicks@canonical.com>
eCryptfs: Remove unnecessary casts when parsing packet lengths 2014-10-29T23:32:59+00:00 Tyler Hicks tyhicks@canonical.com 2014-10-23T14:16:06+00:00 831115af5ca36d713355bf1b379081691eca8b3f The elements in the data array are already unsigned chars and do not need to be casted. Signed-off-by: Tyler Hicks <tyhicks@canonical.com> Reported-by: Dan Carpenter <dan.carpenter@oracle.com> 
The elements in the data array are already unsigned chars and do not
need to be casted.

Signed-off-by: Tyler Hicks <tyhicks@canonical.com>
Reported-by: Dan Carpenter <dan.carpenter@oracle.com>
ecryptfs: remove unnecessary break after goto 2014-07-14T19:29:11+00:00 Fabian Frederick fabf@skynet.be 2014-07-08T16:30:07+00:00 04ec5f5c0022ee941615e304bc75853fe1bc94ba Signed-off-by: Fabian Frederick <fabf@skynet.be> Cc: ecryptfs@vger.kernel.org Signed-off-by: Tyler Hicks <tyhicks@canonical.com> 
Signed-off-by: Fabian Frederick <fabf@skynet.be>
Cc: ecryptfs@vger.kernel.org
Signed-off-by: Tyler Hicks <tyhicks@canonical.com>
ecryptfs: Remove unnecessary include of syscall.h in keystore.c 2014-07-03T21:38:23+00:00 Steven Rostedt rostedt@goodmis.org 2014-06-19T01:15:59+00:00 27199b15e4f027e24969f6644ce4ff414c7e6cba There's no reason to include syscalls.h in keystore.c. Remove it. Signed-off-by: Steven Rostedt <rostedt@goodmis.org> Signed-off-by: Tyler Hicks <tyhicks@canonical.com> 
There's no reason to include syscalls.h in keystore.c. Remove it.

Signed-off-by: Steven Rostedt <rostedt@goodmis.org>
Signed-off-by: Tyler Hicks <tyhicks@canonical.com>
ecryptfs: Fix memory leakage in keystore.c 2013-10-16T22:18:01+00:00 Geyslan G. Bem geyslan@gmail.com 2013-10-11T19:49:16+00:00 3edc8376c06133e3386265a824869cad03a4efd4 In 'decrypt_pki_encrypted_session_key' function: Initializes 'payload' pointer and releases it on exit. Signed-off-by: Geyslan G. Bem <geyslan@gmail.com> Signed-off-by: Tyler Hicks <tyhicks@canonical.com> Cc: stable@vger.kernel.org # v2.6.28+ 
In 'decrypt_pki_encrypted_session_key' function:

Initializes 'payload' pointer and releases it on exit.

Signed-off-by: Geyslan G. Bem <geyslan@gmail.com>
Signed-off-by: Tyler Hicks <tyhicks@canonical.com>
Cc: stable@vger.kernel.org # v2.6.28+
eCryptfs: allow userspace messaging to be disabled 2013-03-04T07:59:59+00:00 Kees Cook keescook@chromium.org 2013-02-28T08:39:37+00:00 290502bee239062499297916bb7d21d205e99d62 When the userspace messaging (for the less common case of userspace key wrap/unwrap via ecryptfsd) is not needed, allow eCryptfs to build with it removed. This saves on kernel code size and reduces potential attack surface by removing the /dev/ecryptfs node. Signed-off-by: Kees Cook <keescook@chromium.org> Signed-off-by: Tyler Hicks <tyhicks@canonical.com> 
When the userspace messaging (for the less common case of userspace key
wrap/unwrap via ecryptfsd) is not needed, allow eCryptfs to build with
it removed. This saves on kernel code size and reduces potential attack
surface by removing the /dev/ecryptfs node.

Signed-off-by: Kees Cook <keescook@chromium.org>
Signed-off-by: Tyler Hicks <tyhicks@canonical.com>
eCryptfs: decrypt_pki_encrypted_session_key(): remove kfree() redundant null check 2013-02-12T18:06:01+00:00 Tim Gardner tim.gardner@canonical.com 2013-02-12T17:56:54+00:00 3a46741804a4226cd837d1246eed95d4161f7159 smatch analysis: fs/ecryptfs/keystore.c:1206 decrypt_pki_encrypted_session_key() info: redundant null check on msg calling kfree() Cc: Dustin Kirkland <dustin.kirkland@gazzang.com> Cc: ecryptfs@vger.kernel.org Signed-off-by: Tim Gardner <tim.gardner@canonical.com> Signed-off-by: Tyler Hicks <tyhicks@canonical.com> 
smatch analysis:

fs/ecryptfs/keystore.c:1206 decrypt_pki_encrypted_session_key() info:
 redundant null check on msg calling kfree()

Cc: Dustin Kirkland <dustin.kirkland@gazzang.com>
Cc: ecryptfs@vger.kernel.org
Signed-off-by: Tim Gardner <tim.gardner@canonical.com>
Signed-off-by: Tyler Hicks <tyhicks@canonical.com>