Linus Torvalds
6d283dba37
vfs: add missing virtual cache flush after editing partial pages ...
Andrew Morton pointed this out a month ago, and then I completely forgot
about it.
If we read a partial last page of a block device, we will zero out the
end of the page, but since that page can then be mapped into user space,
we should also make sure to flush the cache on architectures that have
virtual caches. We have the flush_dcache_page() function for this, so
use it.
Now, in practice this really never matters, because nobody sane uses
virtual caches to begin with, and they largely exist on old broken RISC
arhitectures.
And even if you did run on one of those obsolete CPU's, the whole "mmap
and access the last partial page of a block device" behavior probably
doesn't actually exist. The normal IO functions (read/write) will never
see the zeroed-out part of the page that migth not be coherent in the
cache, because they honor the size of the device.
So I'm marking this for stable (3.7 only), but I'm not sure anybody will
ever care.
Pointed-out-by: Andrew Morton <akpm@linux-foundation.org>
Cc: stable@vger.kernel.org # 3.7
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2013-01-14 13:17:50 -08:00
The following changes since commit 4cbe5a555f:
2012-10-12 09:59:23 +09:00
adfs: drop vmtruncate
2012-12-20 14:00:01 -05:00
affs: drop vmtruncate
2012-12-20 14:00:01 -05:00
Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs
2012-10-02 20:25:04 -07:00
Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/ebiederm/user-namespace
2012-12-17 15:44:47 -08:00
Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs
2012-10-02 20:25:04 -07:00
bfs: drop vmtruncate
2012-12-20 14:00:01 -05:00
Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs
2012-12-20 18:14:31 -08:00
FS-Cache: Mark cancellation of in-progress operation
2012-12-20 22:34:00 +00:00
Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/sage/ceph-client
2012-12-20 14:00:13 -08:00
CIFS: Don't let read only caching for mandatory byte-range locked files
2013-01-01 23:04:30 -06:00
fs: push rcu_barrier() from deactivate_locked_super() to filesystems
2012-10-02 21:35:55 -04:00
lseek: the "whence" argument is called "whence"
2012-12-17 17:15:12 -08:00
debugfs: convert gid= argument from decimal, not octal
2013-01-11 05:56:01 -08:00
TTY: devpts, document devpts inode operations
2012-10-22 16:50:13 -07:00
dlm: fix lvb invalidation conditions
2012-11-16 11:20:42 -06:00
fs/ecryptfs/crypto.c: make ecryptfs_encode_for_filename() static
2012-12-18 10:10:13 -06:00
Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs
2012-10-02 20:25:04 -07:00
exofs: don't leak io_state and pages on read error
2012-12-14 12:17:32 +02:00
Merge branch 'for-3.8' of git://linux-nfs.org/~bfields/linux
2012-12-20 14:04:11 -08:00
ext2: fix return values on parse_options() failure
2012-10-09 23:23:53 +02:00
lseek: the "whence" argument is called "whence"
2012-12-17 17:15:12 -08:00
ext4: remove duplicate call to ext4_bread() in ext4_init_new_dir()
2013-01-06 23:40:25 -05:00
f2fs: bug fixes for 3.8-rc2
2013-01-03 11:41:43 -08:00
fat: fix incorrect function comment
2012-12-20 17:40:20 -08:00
Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs
2012-10-02 20:25:04 -07:00
FS-Cache: Clear remaining page count on retrieval cancellation
2012-12-20 22:35:15 +00:00
Merge branch 'akpm' (Andrew's patch-bomb)
2012-12-17 20:58:12 -08:00
GFS2: Reset rd_last_alloc when it reaches the end of the rgrp
2013-01-02 10:05:27 +00:00
hfs: drop vmtruncate
2012-12-20 14:00:01 -05:00
Merge branch 'akpm' (Andrew's patch-bomb)
2012-12-20 20:00:43 -08:00
Merge branch 'for-linus-37rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/rw/uml
2012-10-10 11:15:20 +09:00
hpfs: drop vmtruncate
2012-12-20 18:40:00 -05:00
pidns: Use task_active_pid_ns where appropriate
2012-11-19 05:59:09 -08:00
Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/trivial
2012-12-13 12:00:02 -08:00
tmpfs,ceph,gfs2,isofs,reiserfs,xfs: fix fh_len checking
2012-10-09 23:33:55 -04:00
Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/trivial
2012-12-13 12:00:02 -08:00
Various bug fixes for ext4. Perhaps the most serious bug fixed is one
2013-01-02 09:57:34 -08:00
jffs2: hold erase_completion_lock on exit
2012-11-18 11:59:01 +02:00
jfs: drop vmtruncate
2012-12-20 18:40:52 -05:00
lockd: Remove BUG_ON()s from fs/lockd/clntproc.c
2012-11-04 14:43:40 -05:00
logfs: drop vmtruncate
2012-12-20 18:40:53 -05:00
minix: drop vmtruncate
2012-12-20 18:40:53 -05:00
ncpfs: drop vmtruncate
2012-12-20 18:40:54 -05:00
nfs: avoid dereferencing null pointer in initiate_bulk_draining
2013-01-05 14:26:51 -05:00
Revert "nfsd: warn on odd reply state in nfsd_vfs_read"
2012-12-21 17:07:45 -08:00
nilfs2: drop vmtruncate
2012-12-20 18:40:54 -05:00
Merge branch 'for-next' of git://git.infradead.org/users/eparis/notify
2012-12-20 20:11:52 -08:00
ntfs: drop vmtruncate
2012-12-20 18:40:55 -05:00
ocfs2: drop vmtruncate
2012-12-20 14:00:01 -05:00
omfs: drop vmtruncate
2012-12-20 14:00:01 -05:00
fs: push rcu_barrier() from deactivate_locked_super() to filesystems
2012-10-02 21:35:55 -04:00
mempolicy: remove arg from mpol_parse_str, mpol_to_str
2013-01-02 09:27:10 -08:00
pstore: remove __dev* attributes.
2013-01-03 15:57:14 -08:00
Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs
2012-10-02 20:25:04 -07:00
Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs
2012-10-02 20:25:04 -07:00
quota: Use the pre-processor to compile out quotactl_cmd_write when !CONFIG_BLOCK
2012-12-13 16:33:24 +01:00
reiserfs: drop vmtruncate
2012-12-20 14:00:01 -05:00
fs: push rcu_barrier() from deactivate_locked_super() to filesystems
2012-10-02 21:35:55 -04:00
Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs
2012-10-02 20:25:04 -07:00
Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/ebiederm/user-namespace
2012-12-17 15:44:47 -08:00
sysv: drop vmtruncate
2012-12-20 14:00:01 -05:00
ubifs: use prandom_bytes
2012-12-17 17:15:26 -08:00
udf: remove un-needed variable from inode_getblk
2012-12-13 16:33:23 +01:00
ufs: drop vmtruncate
2012-12-20 14:00:01 -05:00
xfs: fix sparse reported log CRC endian issue
2012-12-03 12:10:59 -06:00
userns: Allow chown and setgid preservation
2012-11-20 04:17:24 -08:00
lseek: the "whence" argument is called "whence"
2012-12-17 17:15:12 -08:00
get rid of pt_regs argument of ->load_binary()
2012-11-28 21:53:38 -05:00
binfmt_elf: fix corner case kfree of uninitialized data
2012-12-17 17:15:19 -08:00
get rid of pt_regs argument of ->load_binary()
2012-11-28 21:53:38 -05:00
exec: use -ELOOP for max recursion depth
2012-12-17 17:15:23 -08:00
get rid of pt_regs argument of ->load_binary()
2012-11-28 21:53:38 -05:00
exec: do not leave bprm->interp on stack
2012-12-20 17:40:19 -08:00
exec: do not leave bprm->interp on stack
2012-12-20 17:40:19 -08:00
get rid of pt_regs argument of ->load_binary()
2012-11-28 21:53:38 -05:00
vfs: fix: don't increase bio_slab_max if krealloc() fails
2012-10-22 22:00:26 +02:00
lseek: the "whence" argument is called "whence"
2012-12-17 17:15:12 -08:00
vfs: add missing virtual cache flush after editing partial pages
2013-01-14 13:17:50 -08:00
char_dev: pin parent kobject
2012-10-22 08:50:37 +03:00
vfs: define struct filename and have getname() return it
2012-10-12 20:14:55 -04:00
coredump: extend core dump note section to contain file names of mapped files
2012-10-06 03:05:17 +09:00
Merge 3.7-rc3 into tty-next
2012-10-29 09:00:57 -07:00
do_coredump(): get rid of pt_regs argument
2012-11-29 00:01:25 -05:00
coredump: update coredump-related headers
2012-10-06 03:05:15 +09:00
vfs: d_obtain_alias() needs to use "/" as default name.
2012-12-20 18:49:10 -05:00
direct-io: don't read inode->i_blkbits multiple times
2012-11-29 12:38:44 -08:00
fs, eventfd: add procfs fdinfo helper
2012-12-17 17:15:27 -08:00
epoll: prevent missed events on EPOLL_CTL_MOD
2013-01-02 09:16:43 -08:00
fs/exec.c: work around icc miscompilation
2013-01-11 14:54:55 -08:00
Fix F_DUPFD_CLOEXEC breakage
2012-10-09 15:52:31 +09:00
Merge branch 'for-3.8' of git://linux-nfs.org/~bfields/linux
2012-12-20 14:04:11 -08:00
misc: remove __dev* attributes.
2013-01-03 15:57:16 -08:00
fs: Fix imbalance in freeze protection in mark_files_ro()
2012-12-20 13:57:36 -05:00
vfs: define struct filename and have getname() return it
2012-10-12 20:14:55 -04:00
writeback: fix a typo in comment
2012-12-12 17:38:34 -08:00
kill daemonize()
2012-11-28 21:49:02 -05:00
mm: redefine address_space.assoc_mapping
2012-12-11 17:22:26 -08:00
writeback: put unused inodes to LRU after writeback completion
2012-11-26 17:41:24 -08:00
switch simple cases of fget_light to fdget
2012-09-26 22:20:08 -04:00
Introduce a new file system, Flash-Friendly File System (F2FS), to Linux 3.8.
2012-12-20 13:54:52 -08:00
coredump: make core dump functionality optional
2012-10-06 03:05:15 +09:00
vfs: drop vmtruncate
2012-12-20 18:46:29 -05:00
UAPI Disintegration 2012-10-09
2012-10-09 18:35:22 -04:00
f2fs: update Kconfig and Makefile
2012-12-11 13:43:42 +09:00
proc: Usable inode numbers for the namespace file descriptors.
2012-11-20 04:19:49 -08:00
vfs: fix renameat to retry on ESTALE errors
2012-12-20 18:50:05 -05:00
vfs, freeze: use ACCESS_ONCE() to guard access to ->mnt_flags
2012-12-20 13:36:18 -05:00
vfs: make fchownat retry once on ESTALE errors
2012-12-20 18:50:07 -05:00
vfs: Only support slave subtrees across different user namespaces
2012-11-19 05:59:20 -08:00
sendfile: allows bypassing of notifier events
2012-12-20 17:40:21 -08:00
compat: fs: Generic compat_sys_sendfile implementation
2012-10-02 21:35:55 -04:00
switch simple cases of fget_light to fdget
2012-09-26 22:20:08 -04:00
switch simple cases of fget_light to fdget
2012-09-26 22:20:08 -04:00
seq_file: fix new kernel-doc warnings
2013-01-10 14:35:24 -08:00
fs, epoll: add procfs fdinfo helper
2012-12-17 17:15:27 -08:00
tcp: fix MSG_SENDPAGE_NOTLAST logic
2013-01-06 20:58:13 -08:00
vfs: fix readlinkat to retry on ESTALE
2012-12-20 18:50:01 -05:00
vfs: fix user_statfs to retry once on ESTALE errors
2012-12-20 18:50:07 -05:00
vfs: drop lock/unlock super
2012-10-09 23:33:39 -04:00
switch simple cases of fget_light to fdget
2012-09-26 22:20:08 -04:00
switch simple cases of fget_light to fdget
2012-09-26 22:20:08 -04:00
vfs: allow utimensat() calls to retry once on an ESTALE error
2012-12-20 18:50:08 -05:00
vfs: make lremovexattr retry once on ESTALE error
2012-12-20 18:50:11 -05:00
userns: Fix posix_acl_file_xattr_userns gid conversion
2012-10-12 13:16:48 -07:00
6d283dba37