Dan Williams 152d7bd80d dax: fix __dax_pmd_fault crash ...

Since 4.3 introduced devm_memremap_pages() the pfns handled by DAX may
optionally have a struct page backing.  When a mapped pfn reaches
vmf_insert_pfn_pmd() it fails with a crash signature like the following:

 kernel BUG at mm/huge_memory.c:905!
 [..]
 Call Trace:
  [<ffffffff812a73ba>] __dax_pmd_fault+0x2ea/0x5b0
  [<ffffffffa01a4182>] xfs_filemap_pmd_fault+0x92/0x150 [xfs]
  [<ffffffff811fbe02>] handle_mm_fault+0x312/0x1b50

Fix this by falling back to 4K mappings in the pfn_valid() case.  Longer
term, vmf_insert_pfn_pmd() needs to grow support for architectures that
can provide a 'pmd_special' capability.

Cc: <stable@vger.kernel.org>
Cc: Andrew Morton <akpm@linux-foundation.org>
Reported-by: Ross Zwisler <ross.zwisler@linux.intel.com>
Signed-off-by: Dan Williams <dan.j.williams@intel.com>

2015-11-12 18:33:54 -08:00

..

9p

Merge branch 'for-linus-2' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs

2015-11-11 09:45:24 -08:00

adfs

fs/adfs: remove unneeded cast

2015-06-30 19:44:57 -07:00

affs

fs/affs: make root lookup from blkdev logical size

2015-09-10 13:29:01 -07:00

afs

net: Add a struct net parameter to sock_create_kern

2015-05-11 10:50:17 -04:00

autofs4

make simple_positive() public

2015-06-23 18:02:01 -04:00

befs

Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs

2015-07-04 19:36:06 -07:00

bfs

Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs

2015-04-26 17:22:07 -07:00

btrfs

fs/btrfs/inode.c: remove unnecessary new_valid_dev() check

2015-11-09 15:11:24 -08:00

cachefiles

FS-Cache: Handle a write to the page immediately beyond the EOF marker

2015-11-11 02:11:02 -05:00

ceph

mm, fs: introduce mapping_gfp_constraint()

2015-11-06 17:50:42 -08:00

cifs

Merge branch 'akpm' (patches from Andrew)

2015-11-07 14:32:45 -08:00

coda

fs/coda: fix readlink buffer overflow

2015-09-10 13:29:01 -07:00

configfs

configfs: fix kernel infoleak through user-controlled format string

2015-07-17 16:39:53 -07:00

cramfs

…

debugfs

debugfs: fix refcount imbalance in start_creating

2015-11-11 02:04:44 -05:00

devpts

devpts: if initialization failed, don't crash when opening /dev/ptmx

2015-06-30 19:44:58 -07:00

dlm

Merge tag 'dlm-4.4' of git://git.kernel.org/pub/scm/linux/kernel/git/teigland/linux-dlm

2015-11-05 11:15:25 -08:00

ecryptfs

Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/trivial

2015-11-07 13:05:44 -08:00

efivarfs

Merge branch 'x86-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip

2015-05-06 10:57:37 -07:00

efs

fs/efs: femove unneeded cast

2015-06-25 17:00:42 -07:00

exofs

fs/exofs/namei.c: remove unnecessary new_valid_dev() check

2015-11-09 15:11:24 -08:00

exportfs

VFS: (Scripted) Convert S_ISLNK/DIR/REG(dentry->d_inode) to d_is_*(dentry)

2015-02-22 11:38:41 -05:00

ext2

Merge branch 'akpm' (patches from Andrew)

2015-11-09 21:05:13 -08:00

ext4

Merge branch 'for-linus-2' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs

2015-11-11 09:45:24 -08:00

f2fs

fs/f2fs/namei.c: remove unnecessary new_valid_dev() check

2015-11-09 15:11:24 -08:00

fat

writeback: separate out include/linux/backing-dev-defs.h

2015-06-02 08:33:34 -06:00

freevxfs

freevxfs: Grammar s/an negative/a negative/

2015-08-07 13:59:24 +02:00

fscache

FS-Cache: Handle a write to the page immediately beyond the EOF marker

2015-11-11 02:11:02 -05:00

fuse

Move locks API users to locks_lock_inode_wait()

2015-10-22 14:57:36 -04:00

gfs2

Merge branch 'akpm' (patches from Andrew)

2015-11-09 21:05:13 -08:00

hfs

hfs: fix B-tree corruption after insertion at position 0

2015-09-10 13:29:01 -07:00

hfsplus

hfs,hfsplus: cache pages correctly between bnode_create and bnode_free

2015-09-10 13:29:01 -07:00

hostfs

fs: create and use seq_show_option for escaping

2015-09-04 16:54:41 -07:00

hpfs

fs/hpfs/namei.c: remove unnecessary new_valid_dev() check

2015-11-09 15:11:24 -08:00

hugetlbfs

hugetlbfs: add hugetlbfs_fallocate()

2015-09-08 15:35:28 -07:00

isofs

VFS: normal filesystems (and lustre): d_inode() annotations

2015-04-15 15:06:57 -04:00

jbd2

Merge branch 'akpm' (patches from Andrew)

2015-11-07 14:32:45 -08:00

jffs2

Merge branch 'akpm' (patches from Andrew)

2015-11-07 14:32:45 -08:00

jfs

fs/jfs: remove unnecessary new_valid_dev() checks

2015-11-09 15:11:24 -08:00

kernfs

kernfs: implement kernfs_path_len()

2015-08-18 15:49:15 -07:00

lockd

Merge tag 'nfsd-4.4' of git://linux-nfs.org/~bfields/linux

2015-11-11 20:11:28 -08:00

logfs

mm, fs: introduce mapping_gfp_constraint()

2015-11-06 17:50:42 -08:00

minix

Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs

2015-07-04 19:36:06 -07:00

ncpfs

fs/ncpfs/dir.c: remove unnecessary new_valid_dev() check

2015-11-09 15:11:24 -08:00

nfs

Merge tag 'nfs-for-4.4-1' of git://git.linux-nfs.org/projects/trondmy/linux-nfs

2015-11-09 18:11:22 -08:00

nfs_common

lockd: NLM grace period shouldn't block NFSv4 opens

2015-08-13 10:22:06 -04:00

nfsd

nfsd: fix race with open / open upgrade stateids

2015-11-10 09:29:45 -05:00

nilfs2

Merge branch 'for-linus-2' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs

2015-11-11 09:45:24 -08:00

nls

…

notify

inotify: actually check for invalid bits in sys_inotify_add_watch()

2015-11-05 19:34:48 -08:00

ntfs

mm, fs: introduce mapping_gfp_constraint()

2015-11-06 17:50:42 -08:00

ocfs2

Merge branch 'akpm' (patches from Andrew)

2015-11-05 23:10:54 -08:00

omfs

omfs: fix potential integer overflow in allocator

2015-05-28 18:25:19 -07:00

openpromfs

…

overlayfs

Merge branch 'overlayfs-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mszeredi/vfs

2015-10-31 14:49:19 -07:00

proc

Merge branch 'akpm' (patches from Andrew)

2015-11-07 14:32:45 -08:00

pstore

pstore: fix code comment to match code

2015-11-02 13:41:52 -08:00

qnx4

…

qnx6

pagemap.h: move dir_pages() over there

2015-06-23 18:02:00 -04:00

quota

Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs

2015-09-05 20:34:28 -07:00

ramfs

mm, fs: obey gfp_mapping for add_to_page_cache()

2015-10-16 11:42:28 -07:00

reiserfs

fs/reiserfs/namei.c: remove unnecessary new_valid_dev() check

2015-11-09 15:11:24 -08:00

romfs

make new_sync_{read,write}() static

2015-04-11 22:29:40 -04:00

squashfs

fs: cleanup slight list_entry abuse

2015-06-23 18:01:59 -04:00

sysfs

Merge branch 'next' of git://git.kernel.org/pub/scm/linux/kernel/git/jmorris/linux-security

2015-11-05 15:32:38 -08:00

sysv

pagemap.h: move dir_pages() over there

2015-06-23 18:02:00 -04:00

tracefs

tracefs: Fix refcount imbalance in start_creating()

2015-11-04 22:13:45 -05:00

ubifs

Merge tag 'upstream-4.4-rc1' of git://git.infradead.org/linux-ubifs

2015-11-10 16:35:06 -08:00

udf

udf: Don't modify filesystem for read-only mounts

2015-08-20 14:58:35 +02:00

ufs

fix ufs write vs readpage race when writing into a hole

2015-09-09 10:43:12 -07:00

xfs

Merge tag 'xfs-for-linus-4.4' of git://git.kernel.org/pub/scm/linux/kernel/git/dgc/linux-xfs

2015-11-11 20:18:48 -08:00

aio.c

mm: move ->mremap() from file_operations to vm_operations_struct

2015-09-04 16:54:41 -07:00

anon_inodes.c

…

attr.c

…

bad_inode.c

don't bother with most of the bad_file_ops methods

2015-02-20 04:03:58 -05:00

binfmt_aout.c

…

binfmt_elf_fdpic.c

Merge tag 'libnvdimm-for-4.4' of git://git.kernel.org/pub/scm/linux/kernel/git/nvdimm/nvdimm

2015-11-10 12:07:22 -08:00

binfmt_elf.c

Merge branch 'for-linus-2' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs

2015-11-11 09:45:24 -08:00

binfmt_em86.c

…

binfmt_flat.c

…

binfmt_misc.c

Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs

2015-04-26 17:22:07 -07:00

binfmt_script.c

…

block_dev.c

block: Inline blk_integrity in struct gendisk

2015-10-21 14:42:42 -06:00

buffer.c

vfs: remove unused wrapper block_page_mkwrite()

2015-11-11 02:19:33 -05:00

char_dev.c

fs/char_dev.c: fix incorrect documentation for unregister_chrdev_region

2015-08-05 13:49:35 -07:00

compat_binfmt_elf.c

…

compat_ioctl.c

i2c-dev: Fix typo in ioctl name reference

2015-10-23 23:26:43 +02:00

compat.c

…

coredump.c

coredump: change zap_threads() and zap_process() to use for_each_thread()

2015-11-06 17:50:42 -08:00

dax.c

dax: fix __dax_pmd_fault crash

2015-11-12 18:33:54 -08:00

dcache.c

dcache: Reduce the scope of i_lock in d_splice_alias

2015-08-21 02:34:37 -04:00

dcookies.c

…

direct-io.c

Merge branch 'for-4.4/io-poll' of git://git.kernel.dk/linux-block

2015-11-10 17:23:49 -08:00

drop_caches.c

inode: convert inode_sb_list_lock to per-sb

2015-08-17 18:39:46 -04:00

eventfd.c

eventfd: don't take the spinlock in eventfd_poll

2015-02-17 14:34:52 -08:00

eventpoll.c

epoll: optimize setting task running after blocking

2015-02-13 21:21:40 -08:00

exec.c

vfs: Commit to never having exectuables on proc and sysfs.

2015-07-10 10:39:25 -05:00

fcntl.c

…

fhandle.c

vfs: read file_handle only once in handle_to_path

2015-06-02 10:29:07 -07:00

file_table.c

fs, file table: reinit files_stat.max_files after deferred memory initialisation

2015-08-07 04:39:40 +03:00

file.c

vfs: clear remainder of 'full_fds_bits' in dup_fd()

2015-11-05 23:05:32 -08:00

filesystems.c

…

fs_pin.c

fs_pin: Allow for the possibility that m_list or s_list go unused.

2015-04-09 11:39:55 -05:00

fs_struct.c

…

fs-writeback.c

fs: fix writeback.c kernel-doc warnings

2015-11-11 02:18:27 -05:00

inode.c

fs: fix inode.c kernel-doc warning

2015-11-11 02:18:27 -05:00

internal.h

inode: rename i_wb_list to i_io_list

2015-08-17 23:38:10 -04:00

ioctl.c

…

Kconfig

fs: Remove ext3 filesystem driver

2015-07-23 20:59:40 +02:00

Kconfig.binfmt

mm: split ET_DYN ASLR from mmap ASLR

2015-04-14 16:49:05 -07:00

libfs.c

fs: Set the size of empty dirs to 0.

2015-08-12 15:28:45 -05:00

locks.c

locks: cleanup posix_lock_inode_wait and flock_lock_inode_wait

2015-10-22 14:57:42 -04:00

Makefile

ext4: promote ext4 over ext2 in the default probe order

2015-10-15 10:33:21 -04:00

mbcache.c

…

mount.h

fs: use seq_open_private() for proc_mounts

2015-06-30 19:44:56 -07:00

mpage.c

mm, fs: introduce mapping_gfp_constraint()

2015-11-06 17:50:42 -08:00

namei.c

Merge branch 'akpm' (patches from Andrew)

2015-11-07 14:32:45 -08:00

namespace.c

Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/ebiederm/user-namespace

2015-09-01 16:13:25 -07:00

no-block.c

…

nsfs.c

fs/seq_file: convert int seq_vprint/seq_printf/etc... returns to void

2015-09-11 15:21:34 -07:00

open.c

vfs: Commit to never having exectuables on proc and sysfs.

2015-07-10 10:39:25 -05:00

pipe.c

fs/pipe.c: return error code rather than 0 in pipe_write()

2015-11-11 02:18:26 -05:00

pnode.c

mnt: Don't propagate unmounts to locked mounts

2015-04-02 20:34:20 -05:00

pnode.h

mnt: Clarify and correct the disconnect logic in umount_tree

2015-07-22 20:33:27 -05:00

posix_acl.c

fs/posix_acl.c: make posix_acl_create() safer and cleaner

2015-06-23 18:01:07 -04:00

proc_namespace.c

fs: use seq_open_private() for proc_mounts

2015-06-30 19:44:56 -07:00

read_write.c

new_sync_write(): discard ->ki_pos unless the return value is positive

2015-04-11 22:29:46 -04:00

readdir.c

…

select.c

locking/arch: Rename set_mb() to smp_store_mb()

2015-05-19 08:32:00 +02:00

seq_file.c

fs, seqfile: always allow oom killer

2015-11-06 17:50:42 -08:00

signalfd.c

signalfd: fix information leak in signalfd_copyinfo

2015-08-07 04:39:40 +03:00

splice.c

mm, fs: introduce mapping_gfp_constraint()

2015-11-06 17:50:42 -08:00

stack.c

…

stat.c

fs/stat.c: remove unnecessary new_valid_dev() check

2015-11-09 15:11:24 -08:00

statfs.c

…

super.c

Merge branch 'superblock-scaling' of git://git.kernel.org/pub/scm/linux/kernel/git/josef/btrfs-next into for-next

2015-08-21 02:31:20 -04:00

sync.c

fs/sync.c: make sync_file_range(2) use WB_SYNC_NONE writeback

2015-11-06 17:50:42 -08:00

timerfd.c

…

userfaultfd.c

userfaultfd: revert "userfaultfd: waitqueue: add nr wake parameter to __wake_up_locked_key"

2015-09-22 15:09:53 -07:00

utimes.c

…

xattr.c

evm: fix potential race when removing xattrs

2015-05-21 13:28:47 -04:00