At several places we modify EXT4_I(inode)->i_state without holding
i_mutex (ext4_release_file, ext4_bmap, ext4_journalled_writepage,
ext4_do_update_inode, ...). These modifications are racy and we can
lose updates to i_state. So convert handling of i_state to use bitops
which are atomic.
Cc: Jan Kara <jack@suse.cz>
Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
Now that the SLUB seems to be fixed so that it respects the requested
alignment, use kmem_cache_alloc() to allocator if the block size of
the buffer heads to be allocated is less than the page size.
Previously, we were using 16k page on a Power system for each buffer,
even when the file system was using 1k or 4k block size.
Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
Add checks to ext4_free_branches() to make sure a block number found
in an indirect block are valid before trying to free it. If a bad
block number is found, stop freeing the indirect block immediately,
since the file system is corrupt and we will need to run fsck anyway.
This also avoids spamming the logs, and specifically avoids
driver-level "attempt to access beyond end of device" errors obscure
what is really going on.
If you get *really*, *really*, *really* unlucky, without this patch, a
supposed indirect block containing garbage might contain a reference
to a primary block group descriptor, in which case
ext4_free_branches() could end up zero'ing out a block group
descriptor block, and if then one of the block bitmaps for a block
group described by that bg descriptor block is not in memory, and is
read in by ext4_read_block_bitmap(). This function calls
ext4_valid_block_bitmap(), which assumes that bg_inode_table() was
validated at mount time and hasn't been modified since. Since this
assumption is no longer valid, it's possible for the value
(ext4_inode_table(sb, desc) - group_first_block) to go negative, which
will cause ext4_find_next_zero_bit() to trigger a kernel GPF.
Addresses-Google-Bug: #2220436
Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
We have 2 mount options, "barrier" and "auto_da_alloc" which may or
may not take a 1/0 argument. This causes the ext4 superblock mount
code to subtract uninitialized pointers and pass the result to
kmalloc, which results in very noisy failures.
Per Ted's suggestion, initialize the args struct so that
we know whether match_token() found an argument for the
option, and skip match_int() if not.
Also, return error (0) from parse_options if we thought
we found an argument, but match_int() Fails.
Reported-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Eric Sandeen <sandeen@redhat.com>
Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
The "offset" member in ext4_io_end holds bytes, not blocks, so
ext4_lblk_t is wrong - and too small (u32).
This caused the async i/o writes to sparse files beyond 4GB to fail
when they wrapped around to 0.
Also fix up the type of arguments to ext4_convert_unwritten_extents(),
it gets ssize_t from ext4_end_aio_dio_nolock() and
ext4_ext_direct_IO().
Reported-by: Giel de Nijs <giel@vectorwise.com>
Signed-off-by: Eric Sandeen <sandeen@redhat.com>
* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/anholt/drm-intel:
drm/i915: hold ref on flip object until it completes
drm/i915: Fix crash while aborting hibernation
drm/i915: Correctly return -ENOMEM on allocation failure in cmdbuf ioctls.
drm/i915: fix pipe source image setting in flip command
drm/i915: fix flip done interrupt on Ironlake
drm/i915: untangle page flip completion
drm/i915: handle FBC and self-refresh better
drm/i915: Increase fb alignment to 64k
drm/i915: Update write_domains on active list after flush.
drm/i915: Rework DPLL calculation parameters for Ironlake
Replace the zero-division warning message with WARN_ON_ONCE() per the
advice by Linus. This shouldn't happen, but if it happens, it's
possible that the bug happens often due to buggy IRQs.
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Mike Frysinger pointed out that calling tracehook_signal_handler with
stepping=0 missed testing the thread flags, resulting in not calling
ptrace_notify. Fix this by testing if we're single stepping or branch
stepping and setting the flag accordingly.
Tested, seems to work.
Reported-by: Mike Frysinger <vapier@gentoo.org>
Signed-off-by: Kyle McMartin <kyle@mcmartin.ca>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/lrg/voltage-2.6:
regulator/lp3971: vol_map out of bounds in lp3971_{ldo,dcdc}_set_voltage()
regulator: Fix display of null constraints for regulators
After `for (val = LDO_VOL_MIN_IDX; val <= LDO_VOL_MAX_IDX; val++)', if no break
occurs, val reaches LDO_VOL_MIN_IDX + 1, which is out of bounds for
ldo45_voltage_map[] and ldo123_voltage_map[].
Similarly BUCK_TARGET_VOL_MAX_IDX + 1 is out of bounds for buck_voltage_map[].
Signed-off-by: Roel Kluin <roel.kluin@gmail.com>
Acked-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
Signed-off-by: Liam Girdwood <lrg@slimlogic.co.uk>
If the regulator constraints are empty and there is no voltage
reported then nothing will be added to the text displayed for the
constraints, leading to random stack data being printed. This is
unlikely to happen for practical regulators since most will at
least report a voltage but should still be fixed.
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
Cc: stable@kernel.org
Signed-off-by: Liam Girdwood <lrg@slimlogic.co.uk>
This patch solves a corner case during allocation which occurs if both
metadata (indirect) and data blocks are required but there is an
obstacle in the filesystem (e.g. a resource group header or another
allocated block) such that when the allocation is requested only
enough blocks for the metadata are returned.
By changing the exit condition of this loop, we ensure that a
minimum of one data block will always be returned.
Signed-off-by: Steven Whitehouse <swhiteho@redhat.com>
We need this one-liner to signal the mount helper of the 'insufficient journals' condition.
Signed-off-by: Abhijith Das <adas@redhat.com>
Signed-off-by: Steven Whitehouse <swhiteho@redhat.com>
* 'for-linus' of git://git.kernel.dk/linux-2.6-block:
cciss: Make cciss_seq_show handle holes in the h->drv[] array
cfq-iosched: split seeky coop queues after one slice
* 'bugfixes' of git://git.linux-nfs.org/projects/trondmy/nfs-2.6:
NFS: Fix the mapping of the NFSERR_SERVERFAULT error
NFS: Remove a redundant check for PageFsCache in nfs_migrate_page()
NFS: Fix a bug in nfs_fscache_release_page()
* git://git.kernel.org/pub/scm/linux/kernel/git/jejb/scsi-rc-fixes-2.6:
[SCSI] qla2xxx: Obtain proper host structure during response-queue processing.
[SCSI] compat_ioct: fix bsg SG_IO
[SCSI] qla2xxx: make msix interrupt handler safe for irq
[SCSI] zfcp: Report FC BSG errors in correct field
[SCSI] mptfusion : mptscsih_abort return value should be SUCCESS instead of value 0.
* 'drm-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/airlied/drm-2.6: (30 commits)
vgaarb: fix incorrect dereference of userspace pointer.
drm/radeon/kms: retry auxch on 0x20 timeout value.
drm/radeon: Skip dma copy test in benchmark if card doesn't have dma engine.
drm/vmwgfx: Fix a circular locking dependency bug.
drm/vmwgfx: Drop scanout flag compat and add execbuf ioctl parameter members. Bumps major.
drm/vmwgfx: Report propper framebuffer_{max|min}_{width|height}
drm/vmwgfx: Update the user-space interface.
drm/radeon/kms: fix screen clearing before fbcon.
nouveau: fix state detection with switchable graphics
drm/nouveau: move dereferences after null checks
drm/nv50: make the pgraph irq handler loop like the pre-nv50 version
drm/nv50: delete ramfc object after disabling fifo, not before
drm/nv50: avoid unloading pgraph context when ctxprog is running
drm/nv50: align size of buffer object to the right boundaries.
drm/nv50: disregard dac outputs in nv50_sor_dpms()
drm/nv50: prevent multiple init tables being parsed at the same time
drm/nouveau: make dp auxch xfer len check for reads only
drm/nv40: make INIT_COMPUTE_MEM a NOP, just like nv50
drm/nouveau: Add proper vgaarb support.
drm/nouveau: Fix fbcon on mixed pre-NV50 + NV50 multicard.
...
* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/roland/infiniband:
RDMA/cm: Revert association of an RDMA device when binding to loopback
* 'x86-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip:
x86, apic: Don't use logical-flat mode when CPU hotplug may exceed 8 CPUs
x86-32: Make AT_VECTOR_SIZE_ARCH=2
x86/agp: Fix amd64-agp module initialization regression
x86, doc: Fix minor spelling error in arch/x86/mm/gup.c
* git://git.kernel.org/pub/scm/linux/kernel/git/davem/sparc-2.6:
sparc32: Fix thinko in previous change.
sparc: Align clone and signal stacks to 16 bytes.
When reserving stack space for a new process, make sure we're not
attempting to expand the stack by more than rlimit allows.
This fixes a bug caused by b6a2fea393 ("mm:
variable length argument support") and unmasked by
fc63cf2370 ("exec: setup_arg_pages() fails
to return errors").
This bug means that when limiting the stack to less the 20*PAGE_SIZE (eg.
80K on 4K pages or 'ulimit -s 79') all processes will be killed before
they start. This is particularly bad with 64K pages, where a ulimit below
1280K will kill every process.
To test, do:
'ulimit -s 15; ls'
before and after the patch is applied. Before it's applied, 'ls' should
be killed. After the patch is applied, 'ls' should no longer be killed.
A stack limit of 15KB since it's small enough to trigger 20*PAGE_SIZE.
Also 15KB not a multiple of PAGE_SIZE, which is a trickier case to handle
correctly with this code.
4K pages should be fine to test with.
[kosaki.motohiro@jp.fujitsu.com: cleanup]
[akpm@linux-foundation.org: cleanup cleanup]
Signed-off-by: Michael Neuling <mikey@neuling.org>
Signed-off-by: KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com>
Cc: Americo Wang <xiyou.wangcong@gmail.com>
Cc: Anton Blanchard <anton@samba.org>
Cc: Oleg Nesterov <oleg@redhat.com>
Cc: James Morris <jmorris@namei.org>
Cc: Ingo Molnar <mingo@elte.hu>
Cc: Serge Hallyn <serue@us.ibm.com>
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Cc: <stable@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This is used by tcgetsid(3).
Signed-off-by: Andreas Schwab <schwab@linux-m68k.org>
Cc: Alan Cox <alan@lxorguk.ukuu.org.uk>
Acked-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Some unused, unsupported debug code existed in the mpc85xx EDAC driver
that resulted in a build failure when CONFIG_EDAC_DEBUG was defined:
drivers/edac/mpc85xx_edac.c: In function 'mpc85xx_mc_err_probe':
drivers/edac/mpc85xx_edac.c:1031: error: implicit declaration of function 'edac_mc_register_mcidev_debug'
drivers/edac/mpc85xx_edac.c:1031: error: 'debug_attr' undeclared (first use in this function)
drivers/edac/mpc85xx_edac.c:1031: error: (Each undeclared identifier is reported only once
drivers/edac/mpc85xx_edac.c:1031: error: for each function it appears in.)
Signed-off-by: Peter Tyser <ptyser@xes-inc.com>
Signed-off-by: Doug Thompson <dougthompson@xmission.com
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Commit b484625172 ("edac: mpc85xx add
mpc83xx support") accidentally broke how a chip select's first and last
page addresses are calculated. The page addresses are being shifted too
far right by PAGE_SHIFT. This results in errors such as:
EDAC MPC85xx MC1: Err addr: 0x003075c0
EDAC MPC85xx MC1: PFN: 0x00000307
EDAC MPC85xx MC1: PFN out of range!
EDAC MC1: INTERNAL ERROR: row out of range (4 >= 4)
EDAC MC1: CE - no information available: INTERNAL ERROR
The vaule of PAGE_SHIFT is already being taken into consideration during
the calculation of the 'start' and 'end' variables, thus it is not
necessary to account for it again when setting a chip select's first and
last page address.
Signed-off-by: Peter Tyser <ptyser@xes-inc.com>
Signed-off-by: Doug Thompson <dougthompson@xmission.com>
Cc: Ira W. Snyder <iws@ovro.caltech.edu>
Cc: Kumar Gala <galak@gate.crashing.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This patch fixes a bug in the multiblock write tests where the written
data is read back for verifying one block at a time. The tests in
mmc_test assumes that all cards are byte addressable.
This will cause the multi block write tests to fail, leading the user of
the mmc_test driver thinking there is something wrong with the sdhci
driver they are testing.
The start address for the block is calculated as: blocknum * 512. For
block addressable cards the blocknum alone should be used.
Signed-off-by: Johan Kristell <johan.kristell@axis.com>
Cc: <linux-mmc@vger.kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
When suspending, tpm_infineon calls the generic suspend function of the
TPM framework. However, the TPM framework does not return and the system
hangs upon suspend. When sending the necessary command "TPM_SaveState"
directly within the driver, suspending and resuming works fine.
Signed-off-by: Marcel Selhorst <m.selhorst@sirrix.com>
Cc: OGAWA Hirofumi <hirofumi@mail.parknet.co.jp>
Cc: Debora Velarde <debora@linux.vnet.ibm.com>
Cc: Rajiv Andrade <srajiv@linux.vnet.ibm.com>
Cc: <stable@kernel.org> [2.6.32.x]
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
An unfortunate "WARNING" in the message amd64_edac dumps when the system
doesn't support DRAM ECC or ECC checking is not enabled in the BIOS
used to trigger kerneloops which qualified the message as an OOPS thus
misleading the users. See, e.g.
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/422536http://bugzilla.kernel.org/show_bug.cgi?id=15238
Downgrade the message level to KERN_NOTICE and fix the formulation.
Cc: stable@kernel.org # .32.x
Signed-off-by: Borislav Petkov <borislav.petkov@amd.com>
Acked-by: Doug Thompson <dougthompson@xmission.com>
This patch corrects a userspace pointer dereference in the VGA arbiter
in 2.6.32.1.
copy_from_user() is used at line 822 to copy the contents of buf into
kbuf, but a call to strncmp() on line 964 uses buf rather than kbuf. This
problem led to a GPF in strncmp() when X was started on my x86_32 systems.
X triggered the behavior with a write of "target PCI:0000:01:00.0" to
/dev/vga_arbiter.
The patch has been tested against 2.6.32.1 and observed to correct the GPF
observed when starting X or manually writing the string "target
PCI:0000:01:00.0" to /dev/vga_arbiter.
Signed-off-by: Andy Getzendanner <james.getzendanner@students.olin.edu>
Cc: Jesse Barnes <jbarnes@virtuousgeek.org>
Cc: <stable@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Dave Airlie <airlied@redhat.com>
* 'drm-radeon-linus' of ../drm-next:
drm/radeon/kms: retry auxch on 0x20 timeout value.
drm/radeon: Skip dma copy test in benchmark if card doesn't have dma engine.
drm/radeon/kms: fix screen clearing before fbcon.
drm/radeon/kms: add quirk for VGA without DDC on rv730 XFX card.
drm/radeon/kms: don't crash if no DDC bus on VGA/DVI connector.
drm/radeon/kms: change Kconfig text to reflect the new option.
drm/radeon/kms: suspend and resume audio stuff
ATOM appears to return 0x20 which seems to mean some sort of timeout.
retry the transaction up to 10 times before failing, this
makes DP->VGA convertor we bought work at least a bit more predictably.
Signed-off-by: Dave Airlie <airlied@redhat.com>
radeon_copy_dma is only available for r200 or newer cards.
Call to radeon_copy_dma would result to NULL pointer
dereference if benchmarking asic without dma engine.
Signed-off-by: Pauli Nieminen <suokkos@gmail.com>
Signed-off-by: Dave Airlie <airlied@redhat.com>
* 'nouveau/for-airlied' of /home/airlied/kernel/drm-next:
nouveau: fix state detection with switchable graphics
drm/nouveau: move dereferences after null checks
drm/nv50: make the pgraph irq handler loop like the pre-nv50 version
drm/nv50: delete ramfc object after disabling fifo, not before
drm/nv50: avoid unloading pgraph context when ctxprog is running
drm/nv50: align size of buffer object to the right boundaries.
drm/nv50: disregard dac outputs in nv50_sor_dpms()
drm/nv50: prevent multiple init tables being parsed at the same time
drm/nouveau: make dp auxch xfer len check for reads only
drm/nv40: make INIT_COMPUTE_MEM a NOP, just like nv50
drm/nouveau: Add proper vgaarb support.
drm/nouveau: Fix fbcon on mixed pre-NV50 + NV50 multicard.
drivers/gpu/drm/nouveau/nouveau_grctx.c: correct NULL test
drm/nouveau: call ttm_bo_wait with the bo lock held to prevent hang
drm/nouveau: Fixup semaphores on pre-nv50 cards.
drm/nouveau: Add getparam to get available PGRAPH units.
drm/nouveau: Add module options to disable acceleration.
drm/nouveau: fix non-vram notifier blocks
Even if this bumps the version to 1 it does not mean the driver is
out of staging. From what we know this is the last backwards
incompatible change to the driver.
Signed-off-by: Jakob Bornecrantz <jakob@vmware.com>
Signed-off-by: Thomas Hellstrom <thellstrom@vmware.com>
Signed-off-by: Dave Airlie <airlied@redhat.com>
