Commit Graph

29104 Commits

Author SHA1 Message Date
Linus Torvalds
d888af9654 Bug fix: Fix FITRIM argument handling
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Merge tag 'jfs-3.7-2' of git://github.com/kleikamp/linux-shaggy

Pull jfs fix from Dave Kleikamp:
 "Bug fix: Fix FITRIM argument handling"

* tag 'jfs-3.7-2' of git://github.com/kleikamp/linux-shaggy:
  jfs: Fix FITRIM argument handling
2012-10-23 08:49:34 +03:00
Linus Torvalds
e589db7a6a Various bug fixes for ext4. The most serious of them fixes a security
bug (CVE-2012-4508) which leads to stale data exposure when we have
 fallocate racing against writes to files undergoing delayed
 allocation.  We also have two fixes for the metadata checksum feature,
 the most serious of which can cause the superblock to have a invalid
 checksum after a power failure.
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Merge tag 'ext4_for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tytso/ext4

Pull ext4 fixes from Ted Ts'o:
 "Various bug fixes for ext4.  The most serious of them fixes a security
  bug (CVE-2012-4508) which leads to stale data exposure when we have
  fallocate racing against writes to files undergoing delayed
  allocation.  We also have two fixes for the metadata checksum feature,
  the most serious of which can cause the superblock to have a invalid
  checksum after a power failure."

* tag 'ext4_for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tytso/ext4:
  ext4: Avoid underflow in ext4_trim_fs()
  ext4: Checksum the block bitmap properly with bigalloc enabled
  ext4: fix undefined bit shift result in ext4_fill_flex_info
  ext4: fix metadata checksum calculation for the superblock
  ext4: race-condition protection for ext4_convert_unwritten_extents_endio
  ext4: serialize fallocate with ext4_convert_unwritten_extents
2012-10-23 08:48:26 +03:00
Linus Torvalds
344ba37bdc NFS client bugfixes for Linux 3.7
- Do not call pnfs_return_layout() from an rpciod context
 - nfs4_ds_disconnect can cause Oopses. Kill it...
 - Fix the return value for nfs_callback_start_svc
 - Fix a number of compile warnings
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Merge tag 'nfs-for-3.7-2' of git://git.linux-nfs.org/projects/trondmy/linux-nfs

Pull NFS client bugfixes from Trond Myklebust:
 - Do not call pnfs_return_layout() from an rpciod context
 - nfs4_ds_disconnect can cause Oopses.  Kill it...
 - Fix the return value for nfs_callback_start_svc
 - Fix a number of compile warnings

* tag 'nfs-for-3.7-2' of git://git.linux-nfs.org/projects/trondmy/linux-nfs:
  NFSv4: Fix the return value for nfs_callback_start_svc
  NFSv4.1: Declare osd_pri_2_pnfs_err(), objio_init_read/write to be static
  NFSv4: fs/nfs/nfs4getroot.c needs to include "internal.h"
  NFSv4.1: Use kcalloc() to allocate zeroed arrays instead of kzalloc()
  NFSv4.1: Do not call pnfs_return_layout() from an rpciod context
  NFSv4.1: Kill nfs4_ds_disconnect()
2012-10-23 08:47:38 +03:00
Lukas Czerner
5de35e8d5c ext4: Avoid underflow in ext4_trim_fs()
Currently if len argument in ext4_trim_fs() is smaller than one block,
the 'end' variable underflow. Avoid that by returning EINVAL if len is
smaller than file system block.

Also remove useless unlikely().

Signed-off-by: Lukas Czerner <lczerner@redhat.com>
Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
Cc: stable@vger.kernel.org
2012-10-22 18:01:19 -04:00
Dmitry Torokhov
2f0157f13f char_dev: pin parent kobject
In certain cases (for example when a cdev structure is embedded into
another object whose lifetime is controlled by a separate kobject) it is
beneficial to tie lifetime of another object to the lifetime of
character device so that related object is not freed until after
char_dev object is freed.

To achieve this let's pin kobject's parent when doing cdev_add() and
unpin when last reference to cdev structure is being released.

Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
Acked-by: Al Viro <viro@zeniv.linux.org.uk>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2012-10-22 08:50:37 +03:00
Tao Ma
79f1ba4956 ext4: Checksum the block bitmap properly with bigalloc enabled
In mke2fs, we only checksum the whole bitmap block and it is right.
While in the kernel, we use EXT4_BLOCKS_PER_GROUP to indicate the
size of the checksumed bitmap which is wrong when we enable bigalloc.
The right size should be EXT4_CLUSTERS_PER_GROUP and this patch fixes
it.

Also as every caller of ext4_block_bitmap_csum_set and
ext4_block_bitmap_csum_verify pass in EXT4_BLOCKS_PER_GROUP(sb)/8,
we'd better removes this parameter and sets it in the function itself.

Signed-off-by: Tao Ma <boyu.mt@taobao.com>
Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
Reviewed-by: Lukas Czerner <lczerner@redhat.com>
Cc: stable@vger.kernel.org
2012-10-22 00:34:32 -04:00
KAMEZAWA Hiroyuki
9e7814404b hold task->mempolicy while numa_maps scans.
/proc/<pid>/numa_maps scans vma and show mempolicy under
  mmap_sem. It sometimes accesses task->mempolicy which can
  be freed without mmap_sem and numa_maps can show some
  garbage while scanning.

This patch tries to take reference count of task->mempolicy at reading
numa_maps before calling get_vma_policy(). By this, task->mempolicy
will not be freed until numa_maps reaches its end.

V2->v3
  -  updated comments to be more verbose.
  -  removed task_lock() in numa_maps code.
V1->V2
  -  access task->mempolicy only once and remember it.  Becase kernel/exit.c
     can overwrite it.

Signed-off-by: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>
Acked-by: David Rientjes <rientjes@google.com>
Acked-by: KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2012-10-19 14:32:10 -07:00
Linus Torvalds
90cdb1a0e6 Merge branch 'for-3.7' of git://linux-nfs.org/~bfields/linux
Pull nfsd bugfixes from J Bruce Fields.

* 'for-3.7' of git://linux-nfs.org/~bfields/linux:
  SUNRPC: Prevent kernel stack corruption on long values of flush
  NLM: nlm_lookup_file() may return NLMv4-specific error codes
2012-10-19 11:00:00 -07:00
David Rientjes
4338584696 fs, xattr: fix bug when removing a name not in xattr list
Commit 38f3865744 ("xattr: extract simple_xattr code from tmpfs") moved
some code from tmpfs but introduced a subtle bug along the way.

If the name passed to simple_xattr_remove() does not exist in the list of
xattrs, then it is possible to call kfree(new_xattr) when new_xattr is
actually initialized to itself on the stack via uninitialized_var().

This causes a BUG() since the memory was not allocated via the slab
allocator and was not bypassed through to the page allocator because it
was too large.

Initialize the local variable to NULL so the kfree() never takes place.

Reported-by: Fengguang Wu <fengguang.wu@intel.com>
Signed-off-by: David Rientjes <rientjes@google.com>
Acked-by: Hugh Dickins <hughd@google.com>
Acked-by: Aristeu Rozanski <aris@redhat.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2012-10-18 12:35:58 -07:00
Lukas Czerner
4e7a4b0122 jfs: Fix FITRIM argument handling
Currently when 'range->start' is beyond the end of file system
nothing is done and that fact is ignored, where in fact we should return
EINVAL. The same problem is when 'range.len' is smaller than file system
block.

Fix this by adding check for such conditions and return EINVAL
appropriately.

Signed-off-by: Lukas Czerner <lczerner@redhat.com>
Acked-by: Tino Reichardt <milky-kernel@mcmilk.de>
Signed-off-by: Dave Kleikamp <dave.kleikamp@oracle.com>
2012-10-17 09:18:38 -05:00
Trond Myklebust
cd0b16c1c3 NLM: nlm_lookup_file() may return NLMv4-specific error codes
If the filehandle is stale, or open access is denied for some reason,
nlm_fopen() may return one of the NLMv4-specific error codes nlm4_stale_fh
or nlm4_failed. These get passed right through nlm_lookup_file(),
and so when nlmsvc_retrieve_args() calls the latter, it needs to filter
the result through the cast_status() machinery.

Failure to do so, will trigger the BUG_ON() in encode_nlm_stat...

Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
Reported-by: Larry McVoy <lm@bitmover.com>
Cc: stable@kernel.org
Signed-off-by: J. Bruce Fields <bfields@redhat.com>
2012-10-17 10:14:14 -04:00
Linus Torvalds
5d5c5dca9c Merge branch 'for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jack/linux-fs
Pull ext2, ext3, quota fixes from Jan Kara:
 "Fix three regressions caused by user namespace conversions (ext2,
  ext3, quota) and minor ext3 fix and cleanup."

* 'for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jack/linux-fs:
  quota: Silence warning about PRJQUOTA not being handled in need_print_warning()
  ext3: fix return values on parse_options() failure
  ext2: fix return values on parse_options() failure
  ext3: ext3_bread usage audit
  ext3: fix possible non-initialized variable on htree_dirblock_to_tree()
2012-10-16 18:12:38 -07:00
Linus Torvalds
ecb2ecd9c2 Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs
Pull vfs fixes from Al Viro:
 "Fix for my braino in replace_fd(), dhowell's fix for the fallout from
  over-enthusiastic bo^Wdeclaration movements plus crapectomy that
  should've happened a long time ago (SEL_...  definitions)."

* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs:
  bury SEL_{IN,OUT,EX}
  Unexport some bits of linux/fs.h
  fix a leak in replace_fd() users
2012-10-16 18:11:48 -07:00
David Rientjes
32f8516a8c mm, mempolicy: fix printing stack contents in numa_maps
When reading /proc/pid/numa_maps, it's possible to return the contents of
the stack where the mempolicy string should be printed if the policy gets
freed from beneath us.

This happens because mpol_to_str() may return an error the
stack-allocated buffer is then printed without ever being stored.

There are two possible error conditions in mpol_to_str():

 - if the buffer allocated is insufficient for the string to be stored,
   and

 - if the mempolicy has an invalid mode.

The first error condition is not triggered in any of the callers to
mpol_to_str(): at least 50 bytes is always allocated on the stack and this
is sufficient for the string to be written.  A future patch should convert
this into BUILD_BUG_ON() since we know the maximum strlen possible, but
that's not -rc material.

The second error condition is possible if a race occurs in dropping a
reference to a task's mempolicy causing it to be freed during the read().
The slab poison value is then used for the mode and mpol_to_str() returns
-EINVAL.

This race is only possible because get_vma_policy() believes that
mm->mmap_sem protects task->mempolicy, which isn't true.  The exit path
does not hold mm->mmap_sem when dropping the reference or setting
task->mempolicy to NULL: it uses task_lock(task) instead.

Thus, it's required for the caller of a task mempolicy to hold
task_lock(task) while grabbing the mempolicy and reading it.  Callers with
a vma policy store their mempolicy earlier and can simply increment the
reference count so it's guaranteed not to be freed.

Reported-by: Dave Jones <davej@redhat.com>
Signed-off-by: David Rientjes <rientjes@google.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2012-10-16 18:00:50 -07:00
Al Viro
45525b26a4 fix a leak in replace_fd() users
replace_fd() began with "eats a reference, tries to insert into
descriptor table" semantics; at some point I'd switched it to
much saner current behaviour ("try to insert into descriptor
table, grabbing a new reference if inserted; caller should do
fput() in any case"), but forgot to update the callers.
Mea culpa...

[Spotted by Pavel Roskin, who has really weird system with pipe-fed
coredumps as part of what he considers a normal boot ;-)]

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2012-10-16 13:36:50 -04:00
Trond Myklebust
e9b7e91745 NFSv4: Fix the return value for nfs_callback_start_svc
returning PTR_ERR(cb_info->task) just after we have set it to
NULL looks like a typo...

Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
Cc: Stanislav Kinsbursky <skinsbursky@parallels.com>
2012-10-16 13:14:42 -04:00
Trond Myklebust
2e928e4878 NFSv4.1: Declare osd_pri_2_pnfs_err(), objio_init_read/write to be static
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2012-10-16 12:38:00 -04:00
Trond Myklebust
d6aa6a81d4 NFSv4: fs/nfs/nfs4getroot.c needs to include "internal.h"
Fix a warning about "no previous prototype for ‘nfs4_get_rootfh’"

Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2012-10-16 12:37:59 -04:00
Lukas Czerner
76495ec1d4 ext4: fix undefined bit shift result in ext4_fill_flex_info
The result of the bit shift expression in
'1 << sbi->s_log_groups_per_flex' can be undefined in the case that
s_log_groups_per_flex is 31 because the result of the shift is bigger
than INT_MAX. In reality this probably should not cause much problems
since we'll end up with INT_MIN which will then be converted into
'unsigned int' type, but nevertheless according to the ISO C99 the
result is actually undefined.

Fix this by changing the left operand to 'unsigned int' type.

Note that the commit d50f2ab6f0 already
tried to fix the undefined behaviour, but this was missed.

Thanks to Laszlo Ersek for pointing this out and suggesting the fix.

Signed-off-by: Lukas Czerner <lczerner@redhat.com>
Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
Reviewed-by: Carlos Maiolino <cmaiolino@redhat.com>
Reported-by: Laszlo Ersek <lersek@redhat.com>
2012-10-15 12:56:49 -04:00
Trond Myklebust
1813badd98 NFSv4.1: Use kcalloc() to allocate zeroed arrays instead of kzalloc()
Don't circumvent the array size checks.

Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2012-10-15 10:49:43 -04:00
Trond Myklebust
d527e5c15d NFSv4.1: Do not call pnfs_return_layout() from an rpciod context
Move the call to pnfs_return_layout() to the read and write rpc_release()
callbacks, so that it gets called from nfsiod, which is a more appropriate
context.

Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2012-10-15 10:49:43 -04:00
Trond Myklebust
8fcdc31b3d NFSv4.1: Kill nfs4_ds_disconnect()
There is nothing to prevent another thread from dereferencing ds->ds_clp
during or after the call to nfs4_ds_disconnect(), and Oopsing due to the
resulting NULL pointer.

Instead, we should just rely on filelayout_mark_devid_invalid() to keep
us out of trouble by avoiding that deviceid.

Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2012-10-15 10:49:42 -04:00
Linus Torvalds
d25282d1c9 Merge branch 'modules-next' of git://git.kernel.org/pub/scm/linux/kernel/git/rusty/linux
Pull module signing support from Rusty Russell:
 "module signing is the highlight, but it's an all-over David Howells frenzy..."

Hmm "Magrathea: Glacier signing key". Somebody has been reading too much HHGTTG.

* 'modules-next' of git://git.kernel.org/pub/scm/linux/kernel/git/rusty/linux: (37 commits)
  X.509: Fix indefinite length element skip error handling
  X.509: Convert some printk calls to pr_devel
  asymmetric keys: fix printk format warning
  MODSIGN: Fix 32-bit overflow in X.509 certificate validity date checking
  MODSIGN: Make mrproper should remove generated files.
  MODSIGN: Use utf8 strings in signer's name in autogenerated X.509 certs
  MODSIGN: Use the same digest for the autogen key sig as for the module sig
  MODSIGN: Sign modules during the build process
  MODSIGN: Provide a script for generating a key ID from an X.509 cert
  MODSIGN: Implement module signature checking
  MODSIGN: Provide module signing public keys to the kernel
  MODSIGN: Automatically generate module signing keys if missing
  MODSIGN: Provide Kconfig options
  MODSIGN: Provide gitignore and make clean rules for extra files
  MODSIGN: Add FIPS policy
  module: signature checking hook
  X.509: Add a crypto key parser for binary (DER) X.509 certificates
  MPILIB: Provide a function to read raw data into an MPI
  X.509: Add an ASN.1 decoder
  X.509: Add simple ASN.1 grammar compiler
  ...
2012-10-14 13:39:34 -07:00
Linus Torvalds
09a9ad6a1f Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/ebiederm/user-namespace
Pull user namespace compile fixes from Eric W Biederman:
 "This tree contains three trivial fixes.  One compiler warning, one
  thinko fix, and one build fix"

* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/ebiederm/user-namespace:
  btrfs: Fix compilation with user namespace support enabled
  userns: Fix posix_acl_file_xattr_userns gid conversion
  userns: Properly print bluetooth socket uids
2012-10-13 13:23:39 -07:00
Linus Torvalds
bd81ccea85 Merge branch 'for-3.7' of git://linux-nfs.org/~bfields/linux
Pull nfsd update from J Bruce Fields:
 "Another relatively quiet cycle.  There was some progress on my
  remaining 4.1 todo's, but a couple of them were just of the form
  "check that we do X correctly", so didn't have much affect on the
  code.

  Other than that, a bunch of cleanup and some bugfixes (including an
  annoying NFSv4.0 state leak and a busy-loop in the server that could
  cause it to peg the CPU without making progress)."

* 'for-3.7' of git://linux-nfs.org/~bfields/linux: (46 commits)
  UAPI: (Scripted) Disintegrate include/linux/sunrpc
  UAPI: (Scripted) Disintegrate include/linux/nfsd
  nfsd4: don't allow reclaims of expired clients
  nfsd4: remove redundant callback probe
  nfsd4: expire old client earlier
  nfsd4: separate session allocation and initialization
  nfsd4: clean up session allocation
  nfsd4: minor free_session cleanup
  nfsd4: new_conn_from_crses should only allocate
  nfsd4: separate connection allocation and initialization
  nfsd4: reject bad forechannel attrs earlier
  nfsd4: enforce per-client sessions/no-sessions distinction
  nfsd4: set cl_minorversion at create time
  nfsd4: don't pin clientids to pseudoflavors
  nfsd4: fix bind_conn_to_session xdr comment
  nfsd4: cast readlink() bug argument
  NFSD: pass null terminated buf to kstrtouint()
  nfsd: remove duplicate init in nfsd4_cb_recall
  nfsd4: eliminate redundant nfs4_free_stateid
  fs/nfsd/nfs4idmap.c: adjust inconsistent IS_ERR and PTR_ERR
  ...
2012-10-13 10:53:54 +09:00
Jeff Layton
f81700bd83 procfs: don't need a PATH_MAX allocation to hold a string representation of an int
Signed-off-by: Jeff Layton <jlayton@redhat.com>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2012-10-12 20:15:10 -04:00
Jeff Layton
7950e3852a vfs: embed struct filename inside of names_cache allocation if possible
In the common case where a name is much smaller than PATH_MAX, an extra
allocation for struct filename is unnecessary. Before allocating a
separate one, try to embed the struct filename inside the buffer first. If
it turns out that that's not long enough, then fall back to allocating a
separate struct filename and redoing the copy.

Signed-off-by: Jeff Layton <jlayton@redhat.com>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2012-10-12 20:15:10 -04:00
Jeff Layton
adb5c2473d audit: make audit_inode take struct filename
Keep a pointer to the audit_names "slot" in struct filename.

Have all of the audit_inode callers pass a struct filename ponter to
audit_inode instead of a string pointer. If the aname field is already
populated, then we can skip walking the list altogether and just use it
directly.

Signed-off-by: Jeff Layton <jlayton@redhat.com>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2012-10-12 20:15:09 -04:00
Jeff Layton
669abf4e55 vfs: make path_openat take a struct filename pointer
...and fix up the callers. For do_file_open_root, just declare a
struct filename on the stack and fill out the .name field. For
do_filp_open, make it also take a struct filename pointer, and fix up its
callers to call it appropriately.

For filp_open, add a variant that takes a struct filename pointer and turn
filp_open into a wrapper around it.

Signed-off-by: Jeff Layton <jlayton@redhat.com>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2012-10-12 20:15:09 -04:00
Jeff Layton
873f1eedc1 vfs: turn do_path_lookup into wrapper around struct filename variant
...and make the user_path callers use that variant instead.

Signed-off-by: Jeff Layton <jlayton@redhat.com>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2012-10-12 20:15:08 -04:00
Jeff Layton
7ac86265dc audit: allow audit code to satisfy getname requests from its names_list
Currently, if we call getname() on a userland string more than once,
we'll get multiple copies of the string and multiple audit_names
records.

Add a function that will allow the audit_names code to satisfy getname
requests using info from the audit_names list, avoiding a new allocation
and audit_names records.

Signed-off-by: Jeff Layton <jlayton@redhat.com>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2012-10-12 20:15:08 -04:00
Jeff Layton
91a27b2a75 vfs: define struct filename and have getname() return it
getname() is intended to copy pathname strings from userspace into a
kernel buffer. The result is just a string in kernel space. It would
however be quite helpful to be able to attach some ancillary info to
the string.

For instance, we could attach some audit-related info to reduce the
amount of audit-related processing needed. When auditing is enabled,
we could also call getname() on the string more than once and not
need to recopy it from userspace.

This patchset converts the getname()/putname() interfaces to return
a struct instead of a string. For now, the struct just tracks the
string in kernel space and the original userland pointer for it.

Later, we'll add other information to the struct as it becomes
convenient.

Signed-off-by: Jeff Layton <jlayton@redhat.com>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2012-10-12 20:14:55 -04:00
Eric W. Biederman
e9069f4708 btrfs: Fix compilation with user namespace support enabled
When compiling with user namespace support btrfs fails like:

fs/btrfs/tree-log.c: In function ‘fill_inode_item’:
fs/btrfs/tree-log.c:2955:2: error: incompatible type for argument 3 of ‘btrfs_set_inode_uid’
fs/btrfs/ctree.h:2026:1: note: expected ‘u32’ but argument is of type ‘kuid_t’
fs/btrfs/tree-log.c:2956:2: error: incompatible type for argument 3 of ‘btrfs_set_inode_gid’
fs/btrfs/ctree.h:2027:1: note: expected ‘u32’ but argument is of type ‘kgid_t’

Fix this by using i_uid_read and i_gid_read in

Cc: Chris Mason <chris.mason@fusionio.com>
Cc: Josef Bacik <jbacik@fusionio.com>
Signed-off-by: "Eric W. Biederman" <ebiederm@xmission.com>
2012-10-12 15:01:42 -07:00
Eric W. Biederman
ea1fd7776e userns: Fix posix_acl_file_xattr_userns gid conversion
The code needs to be from_kgid(make_kgid(...)...) not
from_kuid(make_kgid(...)...). Doh!

Reported-by: Jan Kara <jack@suse.cz>
Signed-off-by: "Eric W. Biederman" <ebiederm@xmission.com>
2012-10-12 13:16:48 -07:00
Jeff Layton
8e377d1507 vfs: unexport getname and putname symbols
I see no callers in module code.

Signed-off-by: Jeff Layton <jlayton@redhat.com>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2012-10-12 00:32:09 -04:00
Jeff Layton
4fa6b5ecbf audit: overhaul __audit_inode_child to accomodate retrying
In order to accomodate retrying path-based syscalls, we need to add a
new "type" argument to audit_inode_child. This will tell us whether
we're looking for a child entry that represents a create or a delete.

If we find a parent, don't automatically assume that we need to create a
new entry. Instead, use the information we have to try to find an
existing entry first. Update it if one is found and create a new one if
not.

Signed-off-by: Jeff Layton <jlayton@redhat.com>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2012-10-12 00:32:03 -04:00
Jeff Layton
bfcec70874 audit: set the name_len in audit_inode for parent lookups
Currently, this gets set mostly by happenstance when we call into
audit_inode_child. While that might be a little more efficient, it seems
wrong. If the syscall ends up failing before audit_inode_child ever gets
called, then you'll have an audit_names record that shows the full path
but has the parent inode info attached.

Fix this by passing in a parent flag when we call audit_inode that gets
set to the value of LOOKUP_PARENT. We can then fix up the pathname for
the audit entry correctly from the get-go.

While we're at it, clean up the no-op macro for audit_inode in the
!CONFIG_AUDITSYSCALL case.

Signed-off-by: Jeff Layton <jlayton@redhat.com>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2012-10-12 00:32:01 -04:00
Jeff Layton
c43a25abba audit: reverse arguments to audit_inode_child
Most of the callers get called with an inode and dentry in the reverse
order. The compiler then has to reshuffle the arg registers and/or
stack in order to pass them on to audit_inode_child.

Reverse those arguments for a micro-optimization.

Reported-by: Eric Paris <eparis@redhat.com>
Signed-off-by: Jeff Layton <jlayton@redhat.com>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2012-10-12 00:32:00 -04:00
Jeff Layton
f78570dd6a audit: remove unnecessary NULL ptr checks from do_path_lookup
As best I can tell, whenever retval == 0, nd->path.dentry and nd->inode
are also non-NULL. Eliminate those checks and the superfluous
audit_context check.

Signed-off-by: Eric Paris <eparis@redhat.com>
Signed-off-by: Jeff Layton <jlayton@redhat.com>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2012-10-12 00:31:59 -04:00
Linus Torvalds
79360ddd73 Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs
Pull pile 2 of vfs updates from Al Viro:
 "Stuff in this one - assorted fixes, lglock tidy-up, death to
  lock_super().

  There'll be a VFS pile tomorrow (with patches from Jeff Layton,
  sanitizing getname() and related parts of audit and preparing for
  ESTALE fixes), but I'd rather push the stuff in this one ASAP - some
  of the bugs closed here are quite unpleasant."

* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs:
  vfs: bogus warnings in fs/namei.c
  consitify do_mount() arguments
  lglock: add DEFINE_STATIC_LGLOCK()
  lglock: make the per_cpu locks static
  lglock: remove unused DEFINE_LGLOCK_LOCKDEP()
  MAX_LFS_FILESIZE definition for 64bit needs LL...
  tmpfs,ceph,gfs2,isofs,reiserfs,xfs: fix fh_len checking
  vfs: drop lock/unlock super
  ufs: drop lock/unlock super
  sysv: drop lock/unlock super
  hpfs: drop lock/unlock super
  fat: drop lock/unlock super
  ext3: drop lock/unlock super
  exofs: drop lock/unlock super
  dup3: Return an error when oldfd == newfd.
  fs: handle failed audit_log_start properly
  fs: prevent use after free in auditing when symlink following was denied
2012-10-12 10:52:03 +09:00
Linus Torvalds
40924754f2 Merge branch 'writeback-for-next' of git://git.kernel.org/pub/scm/linux/kernel/git/wfg/linux
Pull writeback fixes from Fengguang Wu:
 "Three trivial writeback fixes"

* 'writeback-for-next' of git://git.kernel.org/pub/scm/linux/kernel/git/wfg/linux:
  CPU hotplug, writeback: Don't call writeback_set_ratelimit() too often during hotplug
  writeback: correct comment for move_expired_inodes()
  backing-dev: use kstrto* in preference to simple_strtoul
2012-10-12 10:46:03 +09:00
Linus Torvalds
940e3a8dd6 The following changes since commit 4cbe5a555f:
Linux 3.6-rc4 (2012-09-01 10:39:58 -0700)
 
 are available in the git repository at:
 
   git://git.kernel.org/pub/scm/linux/kernel/git/ericvh/v9fs.git for-next
 
 for you to fetch changes up to 552aad02a283ee88406b102b4d6455eef7127196:
 
   9P: Fix race between p9_write_work() and p9_fd_request() (2012-09-17 14:54:11 -0500)
 
 ----------------------------------------------------------------
 Jeff Layton (1):
       9p: don't use __getname/__putname for uname/aname
 
 Jim Meyering (1):
       fs/9p: avoid debug OOPS when reading a long symlink
 
 Simon Derr (5):
       net/9p: Check errno validity
       9P: Fix race in p9_read_work()
       9P: fix test at the end of p9_write_work()
       9P: Fix race in p9_write_work()
       9P: Fix race between p9_write_work() and p9_fd_request()
 
  fs/9p/v9fs.c      |   30 +++++++++++++++++++-----------
  fs/9p/vfs_inode.c |    8 ++++----
  net/9p/client.c   |   18 ++++++++++++++++--
  net/9p/trans_fd.c |   38 ++++++++++++++++++++------------------
  4 files changed, 59 insertions(+), 35 deletions(-)
 
 Signed-off-by: Eric Van Hensbergen <ericvh@gmail.com>
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Merge tag 'for-linus-merge-3.7' of git://git.kernel.org/pub/scm/linux/kernel/git/ericvh/v9fs

Pull v9fs update from Eric Van Hensbergen.

* tag 'for-linus-merge-3.7' of git://git.kernel.org/pub/scm/linux/kernel/git/ericvh/v9fs:
  9P: Fix race between p9_write_work() and p9_fd_request()
  9P: Fix race in p9_write_work()
  9P: fix test at the end of p9_write_work()
  9P: Fix race in p9_read_work()
  9p: don't use __getname/__putname for uname/aname
  net/9p: Check errno validity
  fs/9p: avoid debug OOPS when reading a long symlink
2012-10-12 09:59:23 +09:00
Arnd Bergmann
98f6ef64b1 vfs: bogus warnings in fs/namei.c
The follow_link() function always initializes its *p argument,
or returns an error, but when building with 'gcc -s', the compiler
gets confused by the __always_inline attribute to the function
and can no longer detect where the cookie was initialized.

The solution is to always initialize the pointer from follow_link,
even in the error path. When building with -O2, this has zero impact
on generated code and adds a single instruction in the error path
for a -Os build on ARM.

Without this patch, building with gcc-4.6 through gcc-4.8 and
CONFIG_CC_OPTIMIZE_FOR_SIZE results in:

fs/namei.c: In function 'link_path_walk':
fs/namei.c:649:24: warning: 'cookie' may be used uninitialized in this function [-Wuninitialized]
fs/namei.c:1544:9: note: 'cookie' was declared here
fs/namei.c: In function 'path_lookupat':
fs/namei.c:649:24: warning: 'cookie' may be used uninitialized in this function [-Wuninitialized]
fs/namei.c:1934:10: note: 'cookie' was declared here
fs/namei.c: In function 'path_openat':
fs/namei.c:649:24: warning: 'cookie' may be used uninitialized in this function [-Wuninitialized]
fs/namei.c:2899:9: note: 'cookie' was declared here

Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2012-10-11 20:02:16 -04:00
Al Viro
808d4e3cfd consitify do_mount() arguments
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2012-10-11 20:02:04 -04:00
J. Bruce Fields
a9ca4043d0 Merge Trond's bugfixes
Merge branch 'bugfixes' of git://linux-nfs.org/~trondmy/nfs-2.6 into
for-3.7-incoming.  Mainly needed for Bryan's "SUNRPC: Set alloc_slot for
backchannel tcp ops", without which the 4.1 server oopses.
2012-10-11 12:41:05 -04:00
Ian Kent
49999ab27e autofs4 - fix reset pending flag on mount fail
In autofs4_d_automount(), if a mount fail occurs the AUTOFS_INF_PENDING
mount pending flag is not cleared.

One effect of this is when using the "browse" option, directory entry
attributes show up with all "?"s due to the incorrect callback and
subsequent failure return (when in fact no callback should be made).

Signed-off-by: Ian Kent <ikent@redhat.com>
Cc: stable@vger.kernel.org
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2012-10-11 10:21:16 +09:00
Linus Torvalds
ce40be7a82 Merge branch 'for-3.7/core' of git://git.kernel.dk/linux-block
Pull block IO update from Jens Axboe:
 "Core block IO bits for 3.7.  Not a huge round this time, it contains:

   - First series from Kent cleaning up and generalizing bio allocation
     and freeing.

   - WRITE_SAME support from Martin.

   - Mikulas patches to prevent O_DIRECT crashes when someone changes
     the block size of a device.

   - Make bio_split() work on data-less bio's (like trim/discards).

   - A few other minor fixups."

Fixed up silent semantic mis-merge as per Mikulas Patocka and Andrew
Morton.  It is due to the VM no longer using a prio-tree (see commit
6b2dbba8b6: "mm: replace vma prio_tree with an interval tree").

So make set_blocksize() use mapping_mapped() instead of open-coding the
internal VM knowledge that has changed.

* 'for-3.7/core' of git://git.kernel.dk/linux-block: (26 commits)
  block: makes bio_split support bio without data
  scatterlist: refactor the sg_nents
  scatterlist: add sg_nents
  fs: fix include/percpu-rwsem.h export error
  percpu-rw-semaphore: fix documentation typos
  fs/block_dev.c:1644:5: sparse: symbol 'blkdev_mmap' was not declared
  blockdev: turn a rw semaphore into a percpu rw semaphore
  Fix a crash when block device is read and block size is changed at the same time
  block: fix request_queue->flags initialization
  block: lift the initial queue bypass mode on blk_register_queue() instead of blk_init_allocated_queue()
  block: ioctl to zero block ranges
  block: Make blkdev_issue_zeroout use WRITE SAME
  block: Implement support for WRITE SAME
  block: Consolidate command flag and queue limit checks for merges
  block: Clean up special command handling logic
  block/blk-tag.c: Remove useless kfree
  block: remove the duplicated setting for congestion_threshold
  block: reject invalid queue attribute values
  block: Add bio_clone_bioset(), bio_clone_kmalloc()
  block: Consolidate bio_alloc_bioset(), bio_kmalloc()
  ...
2012-10-11 09:04:23 +09:00
Linus Torvalds
df632d3ce7 NFS client updates for Linux 3.7
Features include:
 
 - Remove CONFIG_EXPERIMENTAL dependency from NFSv4.1
   Aside from the issues discussed at the LKS, distros are shipping
   NFSv4.1 with all the trimmings.
 - Fix fdatasync()/fsync() for the corner case of a server reboot.
 - NFSv4 OPEN access fix: finally distinguish correctly between
   open-for-read and open-for-execute permissions in all situations.
 - Ensure that the TCP socket is closed when we're in CLOSE_WAIT
 - More idmapper bugfixes
 - Lots of pNFS bugfixes and cleanups to remove unnecessary state and
   make the code easier to read.
 - In cases where a pNFS read or write fails, allow the client to
   resume trying layoutgets after two minutes of read/write-through-mds.
 - More net namespace fixes to the NFSv4 callback code.
 - More net namespace fixes to the NFSv3 locking code.
 - More NFSv4 migration preparatory patches.
   Including patches to detect network trunking in both NFSv4 and NFSv4.1
 - pNFS block updates to optimise LAYOUTGET calls.
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Merge tag 'nfs-for-3.7-1' of git://git.linux-nfs.org/projects/trondmy/linux-nfs

Pull NFS client updates from Trond Myklebust:
 "Features include:

   - Remove CONFIG_EXPERIMENTAL dependency from NFSv4.1
     Aside from the issues discussed at the LKS, distros are shipping
     NFSv4.1 with all the trimmings.
   - Fix fdatasync()/fsync() for the corner case of a server reboot.
   - NFSv4 OPEN access fix: finally distinguish correctly between
     open-for-read and open-for-execute permissions in all situations.
   - Ensure that the TCP socket is closed when we're in CLOSE_WAIT
   - More idmapper bugfixes
   - Lots of pNFS bugfixes and cleanups to remove unnecessary state and
     make the code easier to read.
   - In cases where a pNFS read or write fails, allow the client to
     resume trying layoutgets after two minutes of read/write-
     through-mds.
   - More net namespace fixes to the NFSv4 callback code.
   - More net namespace fixes to the NFSv3 locking code.
   - More NFSv4 migration preparatory patches.
     Including patches to detect network trunking in both NFSv4 and
     NFSv4.1
   - pNFS block updates to optimise LAYOUTGET calls."

* tag 'nfs-for-3.7-1' of git://git.linux-nfs.org/projects/trondmy/linux-nfs: (113 commits)
  pnfsblock: cleanup nfs4_blkdev_get
  NFS41: send real read size in layoutget
  NFS41: send real write size in layoutget
  NFS: track direct IO left bytes
  NFSv4.1: Cleanup ugliness in pnfs_layoutgets_blocked()
  NFSv4.1: Ensure that the layout sequence id stays 'close' to the current
  NFSv4.1: Deal with seqid wraparound in the pNFS return-on-close code
  NFSv4 set open access operation call flag in nfs4_init_opendata_res
  NFSv4.1: Remove the dependency on CONFIG_EXPERIMENTAL
  NFSv4 reduce attribute requests for open reclaim
  NFSv4: nfs4_open_done first must check that GETATTR decoded a file type
  NFSv4.1: Deal with wraparound when updating the layout "barrier" seqid
  NFSv4.1: Deal with wraparound issues when updating the layout stateid
  NFSv4.1: Always set the layout stateid if this is the first layoutget
  NFSv4.1: Fix another refcount issue in pnfs_find_alloc_layout
  NFSv4: don't put ACCESS in OPEN compound if O_EXCL
  NFSv4: don't check MAY_WRITE access bit in OPEN
  NFS: Set key construction data for the legacy upcall
  NFSv4.1: don't do two EXCHANGE_IDs on mount
  NFS: nfs41_walk_client_list(): re-lock before iterating
  ...
2012-10-10 23:52:35 +09:00
Lai Jiangshan
4b2c551f77 lglock: add DEFINE_STATIC_LGLOCK()
When the lglock doesn't need to be exported we can use
DEFINE_STATIC_LGLOCK().

Signed-off-by: Lai Jiangshan <laijs@cn.fujitsu.com>
Cc: Alexander Viro <viro@zeniv.linux.org.uk>
Cc: Rusty Russell <rusty@rustcorp.com.au>
Cc: Andi Kleen <ak@linux.intel.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2012-10-10 01:15:44 -04:00
Theodore Ts'o
06db49e68a ext4: fix metadata checksum calculation for the superblock
The function ext4_handle_dirty_super() was calculating the superblock
on the wrong block data.  As a result, when the superblock is modified
while it is mounted (most commonly, when inodes are added or removed
from the orphan list), the superblock checksum would be wrong.  We
didn't notice because the superblock *was* being correctly calculated
in ext4_commit_super(), and this would get called when the file system
was unmounted.  So the problem only became obvious if the system
crashed while the file system was mounted.

Fix this by removing the poorly designed function signature for
ext4_superblock_csum_set(); if it only took a single argument, the
pointer to a struct superblock, the ambiguity which caused this
mistake would have been impossible.

Reported-by: George Spelvin <linux@horizon.com>
Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
Cc: stable@vger.kernel.org
2012-10-10 01:06:58 -04:00