07 Oct, 2012
1 commit
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Pull pstore changes from Anton Vorontsov:
1) We no longer ad-hoc to the function tracer "high level"
infrastructure and no longer use its debugfs knobs. The change
slightly touches kernel/trace directory, but it got the needed ack
from Steven Rostedt:http://lkml.org/lkml/2012/8/21/688
2) Added maintainers entry;
3) A bunch of fixes, nothing special.
* tag 'for-v3.7' of git://git.infradead.org/users/cbou/linux-pstore:
pstore: Avoid recursive spinlocks in the oops_in_progress case
pstore/ftrace: Convert to its own enable/disable debugfs knob
pstore/ram: Add missing platform_device_unregister
MAINTAINERS: Add pstore maintainers
pstore/ram: Mark ramoops_pstore_write_buf() as notrace
pstore/ram: Fix printk format warning
pstore/ram: Fix possible NULL dereference
06 Oct, 2012
29 commits
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Convert cpu_to_beXX(beXX_to_cpu(E1) + E2) to use beXX_add_cpu().
dpatch engine is used to auto generate this patch.
(https://github.com/weiyj/dpatch)Signed-off-by: Wei Yongjun
Acked-by: Bob Copeland
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
This cleanup also fixes the following sparse warning:
fs/proc/root.c:64:45: warning: Using plain integer as NULL pointer
Signed-off-by: Sachin Kamat
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
The use of if (!head) BUG(); can be replaced with the single line
BUG_ON(!head).Signed-off-by: Prasad Joshi
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
Part of the memory will be written twice after this change, but that
should be negligible.[akpm@linux-foundation.org: fix __proc_create() coding-style issues, remove unneeded zero-initialisations]
Signed-off-by: yan
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
proc_get_inode() obtains the inode via a call to iget_locked().
iget_locked() calls alloc_inode() which will call proc_alloc_inode() which
clears proc_inode.fd, so there is no need to clear this field in
proc_get_inode().If iget_locked() instead found the inode via find_inode_fast(), that inode
will not have I_NEW set so this change has no effect.Signed-off-by: yan
Cc: Al Viro
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
If proc_get_inode() returns NULL then presumably it encountered memory
exhaustion. proc_lookup_de() should return -ENOMEM in this case, not
-EINVAL.Signed-off-by: yan
Cc: Ryan Mallon
Cc: Cong Wang
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
This note has the following format:
long count -- how many files are mapped
long page_size -- units for file_ofs
array of [COUNT] elements of
long start
long end
long file_ofs
followed by COUNT filenames in ASCII: "FILE1" NUL "FILE2" NUL...Signed-off-by: Denys Vlasenko
Cc: Oleg Nesterov
Cc: Amerigo Wang
Cc: "Jonathan M. Foote"
Cc: Roland McGrath
Cc: Pedro Alves
Cc: Fengguang Wu
Cc: Stephen Rothwell
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
Existing PRSTATUS note contains only si_signo, si_code, si_errno fields
from the siginfo of the signal which caused core to be dumped.There are tools which try to analyze crashes for possible security
implications, and they want to use, among other data, si_addr field from
the SIGSEGV.This patch adds a new elf note, NT_SIGINFO, which contains the complete
siginfo_t of the signal which killed the process.Signed-off-by: Denys Vlasenko
Reviewed-by: Oleg Nesterov
Cc: Amerigo Wang
Cc: "Jonathan M. Foote"
Cc: Roland McGrath
Cc: Pedro Alves
Cc: Fengguang Wu
Cc: Stephen Rothwell
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
This is a preparatory patch for the introduction of NT_SIGINFO elf note.
With this patch we pass "siginfo_t *siginfo" instead of "int signr" to
do_coredump() and put it into coredump_params. It will be used by the
next patch. Most changes are simple s/signr/siginfo->si_signo/.Signed-off-by: Denys Vlasenko
Reviewed-by: Oleg Nesterov
Cc: Amerigo Wang
Cc: "Jonathan M. Foote"
Cc: Roland McGrath
Cc: Pedro Alves
Cc: Fengguang Wu
Cc: Stephen Rothwell
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
Cosmetic. Change setup_new_exec() and task_dumpable() to use
SUID_DUMPABLE_ENABLED for /bin/grep.[akpm@linux-foundation.org: checkpatch fixes]
Signed-off-by: Oleg Nesterov
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
Some coredump handlers want to create a core file in a way compatible with
standard behavior. Standard behavior with fs.suid_dumpable = 2 is to
create core file with uid=gid=0. However, there was no way for coredump
handler to know that the process being dumped was suid'ed.This patch adds the new %d specifier for format_corename() which simply
reports __get_dumpable(mm->flags), this is compatible with
/proc/sys/fs/suid_dumpable we already have.Addresses https://bugzilla.redhat.com/show_bug.cgi?id=787135
Developed during a discussion with Denys Vlasenko.
Signed-off-by: Oleg Nesterov
Cc: Denys Vlasenko
Cc: Alex Kelly
Cc: Andi Kleen
Cc: Cong Wang
Cc: Jiri Moskovcak
Acked-by: Neil Horman
Cc: Alan Cox
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
Create a new header file, fs/coredump.h, which contains functions only
used by the new coredump.c. It also moves do_coredump to the
include/linux/coredump.h header file, for consistency.Signed-off-by: Alex Kelly
Reviewed-by: Josh Triplett
Acked-by: Serge Hallyn
Acked-by: Kees Cook
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
Adds an expert Kconfig option, CONFIG_COREDUMP, which allows disabling of
core dump. This saves approximately 2.6k in the compiled kernel, and
complements CONFIG_ELF_CORE, which now depends on it.CONFIG_COREDUMP also disables coredump-related sysctls, except for
suid_dumpable and related functions, which are necessary for ptrace.[akpm@linux-foundation.org: fix binfmt_aout.c build]
Signed-off-by: Alex Kelly
Reviewed-by: Josh Triplett
Acked-by: Serge Hallyn
Acked-by: Kees Cook
Cc: Randy Dunlap
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
[akpm@linux-foundation.org: checkpatch fixes]
Signed-off-by: Namjae Jeon
Signed-off-by: Amit Sahrawat
Acked-by: OGAWA Hirofumi
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
#define FAT_ENT_EOF(EOF_FAT32)
there is no need to reset value of 'new' for FAT32 as the values is
already correctSigned-off-by: Namjae Jeon
Signed-off-by: Amit Sahrawat
Acked-by: OGAWA Hirofumi
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
1: Stop any lines going over 80 characters
2: Remove a blank line before EXPORT_SYMBOL_GPLSigned-off-by: Cruz Julian Bishop
Acked-by: OGAWA Hirofumi
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
1: Import linux/uaccess.h instead of asm.uaccess.h
2: Stop any lines going over 80 characters
3: Stopped setting any variables in if statements
4: Stopped splitting quoted strings
5: Removed unneeded parenthesesSigned-off-by: Cruz Julian Bishop
Acked-by: OGAWA Hirofumi
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
Simply remove the spacing between function definitions and
EXPORT_SYMBOL_GPL calls, which were previously generating warnings.Signed-off-by: Cruz Julian Bishop
Acked-by: OGAWA Hirofumi
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
This does the following:
1: Splits the arguments of a function call to stop it
from exceeding 80 characters
2: Re-indents the arguments of another function call
to prevent the splitting of a quoted string.Signed-off-by: Cruz Julian Bishop
Acked-by: OGAWA Hirofumi
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
The comments were not lined up properly, so I just re-indented them.
This also fixes a stupid checkpatch issue unknowingly
Signed-off-by: Cruz Julian Bishop
Acked-by: OGAWA Hirofumi
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
Mainly fix spacing issues such as "foo * bar" and "foo= bar"
Signed-off-by: Cruz Julian Bishop
Acked-by: OGAWA Hirofumi
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
Add a space before an equals sign/operator in line 410.
Signed-off-by: Cruz Julian Bishop
Acked-by: OGAWA Hirofumi
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
Maintain an index of directory inodes by starting cluster, so that
fat_get_parent() can return the proper cached inode rather than inventing
one that cannot be traced back to the filesystem root.Add a new msdos/vfat binary mount option "nfs" so that FAT filesystems
that are _not_ exported via NFS are not saddled with maintenance of an
index they will never use.Finally, simplify NFS file handle generation and lookups. An
ext2-congruent implementation is adequate for FAT needs.Signed-off-by: Steven J. Magnani
Acked-by: OGAWA Hirofumi
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
Under memory pressure, the system may evict dentries from cache. When the
FAT driver receives a NFS request involving an evicted dentry, it is
unable to reconnect it to the filesystem root. This causes the request to
fail, often with ENOENT.This is partially due to ineffectiveness of the current FAT NFS
implementation, and partially due to an unimplemented fh_to_parent method.
The latter can cause file accesses to fail on shares exported with
subtree_check.This patch set provides the FAT driver with the ability to
reconnect dentries. NFS file handle generation and lookups are simplified
and made congruent with ext2.Testing has involved a memory-starved virtual machine running 3.5-rc5 that
exports a ~2 GB vfat filesystem containing a kernel tree (~770 MB, ~40000
files, 9 levels). Both 'cp -r' and 'ls -lR' operations were performed
from a client, some overlapping, some consecutive. Exports with
'subtree_check' and 'no_subtree_check' have been tested.Note that while this patch set improves FAT's NFS support, it does not
eliminate ESTALE errors completely.The following should be considered for NFS clients who are sensitive to ESTALE:
* Mounting with lookupcache=none
Unfortunately this can degrade performance severely, particularly for deep
filesystems.* Incorporating VFS patches to retry ESTALE failures on the client-side,
such as https://lkml.org/lkml/2012/6/29/381* Handling ESTALE errors in client application code
This patch:
Move NFS-related code into its own C file. No functional changes.
Signed-off-by: Steven J. Magnani
Acked-by: OGAWA Hirofumi
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
Use accessor function for msdos_dir_entry 'start'
Signed-off-by: Namjae Jeon
Signed-off-by: Amit Sahrawat
Acked-by: OGAWA Hirofumi
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
Convert cpu_to_leXX(leXX_to_cpu(E1) + E2) to use leXX_add_cpu().
dpatch engine is used to auto generate this patch.
(https://github.com/weiyj/dpatch)Signed-off-by: Wei Yongjun
Cc: Mikulas Patocka
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
load_elf_interp() has interp_map_addr carefully described as
"uninitialized_var" and marked so as to avoid a warning. However if you
trace the code it is passed into load_elf_interp and then this value is
checked against NULL.As this return value isn't used this is actually safe but it freaks
various analysis tools that see un-initialized memory addresses being read
before their value is ever defined.Set it to NULL as a matter of programming good taste if nothing else
Signed-off-by: Alan Cox
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
Enhanced epoll_ctl to support EPOLL_CTL_DISABLE, which disables an epoll
item. If epoll_ctl doesn't return -EBUSY in this case, it is then safe to
delete the epoll item in a multi-threaded environment. Also added a new
test_epoll self- test app to both demonstrate the need for this feature
and test it.Signed-off-by: Paton J. Lewis
Cc: Alexander Viro
Cc: Jason Baron
Cc: Paul Holland
Cc: Davide Libenzi
Cc: Michael Kerrisk
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
To avoid name conflicts:
drivers/video/riva/fbdev.c:281:9: sparse: preprocessor token MAX_LEVEL redefined
While at it, also make the other names more consistent and add
parentheses.[akpm@linux-foundation.org: repair fallout]
[sfr@canb.auug.org.au: IB/mlx4: fix for MAX_ID_MASK to MAX_IDR_MASK name change]
Signed-off-by: Fengguang Wu
Cc: Bernd Petrovitsch
Cc: walter harms
Cc: Glauber Costa
Signed-off-by: Stephen Rothwell
Cc: Roland Dreier
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds
05 Oct, 2012
1 commit
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Pull ext3 & udf fixes from Jan Kara:
"Shortlog pretty much says it all.The interesting bits are UDF support for direct IO and ext3 fix for a
long standing oops in data=journal mode."* 'for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jack/linux-fs:
jbd: Fix assertion failure in commit code due to lacking transaction credits
UDF: Add support for O_DIRECT
ext3: Replace 0 with NULL for pointer in super.c file
udf: add writepages support for udf
ext3: don't clear orphan list on ro mount with errors
reiserfs: Make reiserfs_xattr_handlers static
03 Oct, 2012
9 commits
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Pull JFS update from Dave Kleikamp:
"JFS TRIM support and some minor fixes"* tag 'jfs-3.7' of git://github.com/kleikamp/linux-shaggy:
jfs: Fix do_div precision in commit b40c2e66
JFS: use list_move instead of list_del/list_add
jfs: Remove obsolete email address
fs/jfs: TRIM support for JFS Filesystem -
Pull security subsystem updates from James Morris:
"Highlights:- Integrity: add local fs integrity verification to detect offline
attacks
- Integrity: add digital signature verification
- Simple stacking of Yama with other LSMs (per LSS discussions)
- IBM vTPM support on ppc64
- Add new driver for Infineon I2C TIS TPM
- Smack: add rule revocation for subject labels"Fixed conflicts with the user namespace support in kernel/auditsc.c and
security/integrity/ima/ima_policy.c.* 'next' of git://git.kernel.org/pub/scm/linux/kernel/git/jmorris/linux-security: (39 commits)
Documentation: Update git repository URL for Smack userland tools
ima: change flags container data type
Smack: setprocattr memory leak fix
Smack: implement revoking all rules for a subject label
Smack: remove task_wait() hook.
ima: audit log hashes
ima: generic IMA action flag handling
ima: rename ima_must_appraise_or_measure
audit: export audit_log_task_info
tpm: fix tpm_acpi sparse warning on different address spaces
samples/seccomp: fix 31 bit build on s390
ima: digital signature verification support
ima: add support for different security.ima data types
ima: add ima_inode_setxattr/removexattr function and calls
ima: add inode_post_setattr call
ima: replace iint spinblock with rwlock/read_lock
ima: allocating iint improvements
ima: add appraise action keywords and default rules
ima: integrity appraisal extension
vfs: move ima_file_free before releasing the file
... -
Pull ubifs changes from Artem Bityutskiy:
"No big changes for 3.7 in UBIFS:
- Error reporting and debug printing improvements
- Power cut emulation fixes
- Minor cleanups"Fix trivial conflict in fs/ubifs/debug.c due to the user namespace
changes.* tag 'upstream-3.7-rc1' of git://git.infradead.org/linux-ubifs:
UBIFS: print less
UBIFS: use pr_ helper instead of printk
UBIFS: comply with coding style
UBIFS: use __aligned() attribute
UBIFS: remove __DATE__ and __TIME__
UBIFS: fix power cut emulation for mtdram
UBIFS: improve scanning debug output
UBIFS: always print full error reports
UBIFS: print PID in debug messages -
Pull xfs update from Ben Myers:
"Several enhancements and cleanups:- make inode32 and inode64 remountable options
- SEEK_HOLE/SEEK_DATA enhancements
- cleanup struct declarations in xfs_mount.h"* tag 'for-linus-v3.7-rc1' of git://oss.sgi.com/xfs/xfs:
xfs: Make inode32 a remountable option
xfs: add inode64->inode32 transition into xfs_set_inode32()
xfs: Fix mp->m_maxagi update during inode64 remount
xfs: reduce code duplication handling inode32/64 options
xfs: make inode64 as the default allocation mode
xfs: Fix m_agirotor reset during AG selection
Make inode64 a remountable option
xfs: stop the sync worker before xfs_unmountfs
xfs: xfs_seek_hole() refinement with hole searching from page cache for unwritten extents
xfs: xfs_seek_data() refinement with unwritten extents check up from page cache
xfs: Introduce a helper routine to probe data or hole offset from page cache
xfs: Remove type argument from xfs_seek_data()/xfs_seek_hole()
xfs: fix race while discarding buffers [V4]
xfs: check for possible overflow in xfs_ioc_trim
xfs: unlock the AGI buffer when looping in xfs_dialloc
xfs: kill struct declarations in xfs_mount.h
xfs: fix uninitialised variable in xfs_rtbuf_get() -
Pull vfs update from Al Viro:
- big one - consolidation of descriptor-related logics; almost all of
that is moved to fs/file.c(BTW, I'm seriously tempted to rename the result to fd.c. As it is,
we have a situation when file_table.c is about handling of struct
file and file.c is about handling of descriptor tables; the reasons
are historical - file_table.c used to be about a static array of
struct file we used to have way back).A lot of stray ends got cleaned up and converted to saner primitives,
disgusting mess in android/binder.c is still disgusting, but at least
doesn't poke so much in descriptor table guts anymore. A bunch of
relatively minor races got fixed in process, plus an ext4 struct file
leak.- related thing - fget_light() partially unuglified; see fdget() in
there (and yes, it generates the code as good as we used to have).- also related - bits of Cyrill's procfs stuff that got entangled into
that work; _not_ all of it, just the initial move to fs/proc/fd.c and
switch of fdinfo to seq_file.- Alex's fs/coredump.c spiltoff - the same story, had been easier to
take that commit than mess with conflicts. The rest is a separate
pile, this was just a mechanical code movement.- a few misc patches all over the place. Not all for this cycle,
there'll be more (and quite a few currently sit in akpm's tree)."Fix up trivial conflicts in the android binder driver, and some fairly
simple conflicts due to two different changes to the sock_alloc_file()
interface ("take descriptor handling from sock_alloc_file() to callers"
vs "net: Providing protocol type via system.sockprotoname xattr of
/proc/PID/fd entries" adding a dentry name to the socket)* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs: (72 commits)
MAX_LFS_FILESIZE should be a loff_t
compat: fs: Generic compat_sys_sendfile implementation
fs: push rcu_barrier() from deactivate_locked_super() to filesystems
btrfs: reada_extent doesn't need kref for refcount
coredump: move core dump functionality into its own file
coredump: prevent double-free on an error path in core dumper
usb/gadget: fix misannotations
fcntl: fix misannotations
ceph: don't abuse d_delete() on failure exits
hypfs: ->d_parent is never NULL or negative
vfs: delete surplus inode NULL check
switch simple cases of fget_light to fdget
new helpers: fdget()/fdput()
switch o2hb_region_dev_write() to fget_light()
proc_map_files_readdir(): don't bother with grabbing files
make get_file() return its argument
vhost_set_vring(): turn pollstart/pollstop into bool
switch prctl_set_mm_exe_file() to fget_light()
switch xfs_find_handle() to fget_light()
switch xfs_swapext() to fget_light()
... -
This function is used by sparc, powerpc and arm64 for compat support.
The patch adds a generic implementation which calls do_sendfile()
directly and avoids set_fs().The sparc architecture has wrappers for the sign extensions while
powerpc relies on the compiler to do the this. The patch adds wrappers
for powerpc to handle the u32->int type conversion.compat_sys_sendfile64() can be replaced by a sys_sendfile() call since
compat_loff_t has the same size as off_t on a 64-bit system.On powerpc, the patch also changes the 64-bit sendfile call from
sys_sendile64 to sys_sendfile.Signed-off-by: Catalin Marinas
Acked-by: David S. Miller
Cc: Arnd Bergmann
Cc: Benjamin Herrenschmidt
Cc: Paul Mackerras
Cc: Alexander Viro
Cc: Andrew Morton
Signed-off-by: Al Viro -
There's no reason to call rcu_barrier() on every
deactivate_locked_super(). We only need to make sure that all delayed rcu
free inodes are flushed before we destroy related cache.Removing rcu_barrier() from deactivate_locked_super() affects some fast
paths. E.g. on my machine exit_group() of a last process in IPC
namespace takes 0.07538s. rcu_barrier() takes 0.05188s of that time.Signed-off-by: Kirill A. Shutemov
Cc: Al Viro
Signed-off-by: Andrew Morton
Signed-off-by: Al Viro -
All increments and decrements are under the same spinlock - have to be,
since they need to protect the radix_tree it's found in. Just use
int, no need to wank with kref...Signed-off-by: Al Viro
-
This prepares for making core dump functionality optional.
The variable "suid_dumpable" and associated functions are left in fs/exec.c
because they're used elsewhere, such as in ptrace.Signed-off-by: Alex Kelly
Reviewed-by: Josh Triplett
Acked-by: Serge Hallyn
Acked-by: Kees Cook
Signed-off-by: Andrew Morton
Signed-off-by: Al Viro
