leandrof/linux
1
0
Fork 0
forked from Minki/linux
Code Issues Pull Requests Packages Projects Releases Wiki Activity
5d47a35600
linux/fs
History
Trond Myklebust 5d47a35600 NFS: Fix a potential file corruption issue when writing 
If the inode is flagged as having an invalid mapping, then we can't rely on
the PageUptodate() flag. Ensure that we don't use the "anti-fragmentation"
write optimisation in nfs_updatepage(), since that will cause NFS to write
out areas of the page that are no longer guaranteed to be up to date.

A potential corruption could occur in the following scenario:

client 1			client 2
===============			===============
				fd=open("f",O_CREAT|O_WRONLY,0644);
				write(fd,"fubar\n",6);	// cache last page
				close(fd);
fd=open("f",O_WRONLY|O_APPEND);
write(fd,"foo\n",4);
close(fd);

				fd=open("f",O_WRONLY|O_APPEND);
				write(fd,"bar\n",4);
				close(fd);
-----
The bug may lead to the file "f" reading 'fubar\n\0\0\0\nbar\n' because
client 2 does not update the cached page after re-opening the file for
write. Instead it keeps it marked as PageUptodate() until someone calls
invaldate_inode_pages2() (typically by calling read()).

Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2008-02-07 19:20:20 -05:00
..
9p Convert ERR_PTR(PTR_ERR(p)) instances to ERR_CAST(p) 2008-02-07 08:42:26 -08:00
adfs Slab API: remove useless ctor parameter and reorder parameters 2007-10-17 08:42:45 -07:00
affs iget: stop AFFS from using iget() and read_inode() 2008-02-07 08:42:27 -08:00
afs iget: use iget_failed() in AFS 2008-02-07 08:42:26 -08:00
autofs iget: stop autofs from using iget() and read_inode() 2008-02-07 08:42:27 -08:00
autofs4 pid namespaces: round up the API 2007-10-19 11:53:37 -07:00
befs iget: stop BEFS from using iget() and read_inode() 2008-02-07 08:42:27 -08:00
bfs iget: stop BFS from using iget() and read_inode() 2008-02-07 08:42:27 -08:00
cifs iget: stop CIFS from using iget() and read_inode() 2008-02-07 08:42:27 -08:00
coda coda: convert struct class_device to struct device 2008-01-24 20:40:05 -08:00
configfs configfs: file.c fix possible recursive locking 2008-01-25 15:05:47 -08:00
cramfs fs/cramfs/inode.c: replace hardcoded value with preprocessor constant 2007-10-18 14:37:29 -07:00
debugfs Kobject: convert fs/* from kobject_unregister() to kobject_put() 2008-01-24 20:40:40 -08:00
devpts
dlm dlm: static initialization improvements 2008-01-30 11:04:43 -06:00
ecryptfs ecryptfs: check for existing key_tfm at mount time 2008-02-06 10:41:13 -08:00
efs iget: stop EFS from using iget() and read_inode() 2008-02-07 08:42:27 -08:00
exportfs exportfs: update documentation 2007-10-22 08:13:21 -07:00
ext2 iget: stop EXT2 from using iget() and read_inode() 2008-02-07 08:42:27 -08:00
ext3 iget: stop EXT3 from using iget() and read_inode() 2008-02-07 08:42:27 -08:00
ext4 iget: stop EXT4 from using iget() and read_inode() 2008-02-07 08:42:27 -08:00
fat iget: stop FAT from using iget() and read_inode() 2008-02-07 08:42:28 -08:00
freevxfs iget: stop FreeVXFS from using iget() and read_inode() 2008-02-07 08:42:28 -08:00
fuse iget: stop FUSE from using iget() and read_inode() 2008-02-07 08:42:28 -08:00
gfs2 iget: use iget_failed() in GFS2 2008-02-07 08:42:27 -08:00
hfs hfs: update comment to reflect actual init and exit routines 2008-02-06 10:41:05 -08:00
hfsplus iget: stop HFSPLUS from using iget() and read_inode() 2008-02-07 08:42:28 -08:00
hostfs iget: stop HOSTFS from using iget() and read_inode() 2008-02-07 08:42:29 -08:00
hpfs Slab API: remove useless ctor parameter and reorder parameters 2007-10-17 08:42:45 -07:00
hppfs iget: stop HPPFS from using iget() and read_inode() 2008-02-07 08:42:29 -08:00
hugetlbfs hugetlb: allow sticky directory mount option 2008-02-05 09:44:14 -08:00
isofs iget: stop ISOFS from using read_inode() 2008-02-07 08:42:28 -08:00
jbd make jbd/journal.c:__journal_abort_hard() static 2008-02-06 10:41:20 -08:00
jbd2 BKL-removal: remove incorrect comment refering to lock_kernel() from jbd/jbd2 2008-02-06 10:41:20 -08:00
jffs2 Merge git://git.infradead.org/mtd-2.6 2008-02-07 10:20:31 -08:00
jfs BKL-removal: Implement a compat_ioctl handler for JFS 2008-02-07 13:45:29 -06:00
lockd NLM: tear down RPC clients in nlm_shutdown_hosts 2008-02-01 16:42:15 -05:00
minix iget: stop the MINIX filesystem from using iget() and read_inode() 2008-02-07 08:42:28 -08:00
msdos
ncpfs NCPFS: update diagnostic strings to match routine names. 2008-02-06 10:41:05 -08:00
nfs NFS: Fix a potential file corruption issue when writing 2008-02-07 19:20:20 -05:00
nfs_common
nfsd Convert ERR_PTR(PTR_ERR(p)) instances to ERR_CAST(p) 2008-02-07 08:42:26 -08:00
nls sparse pointer use of zero as null 2007-10-18 14:37:31 -07:00
ntfs is_vmalloc_addr(): Check if an address is within the vmalloc boundaries 2008-02-05 09:44:14 -08:00
ocfs2 ocfs2: Negotiate locking protocol versions. 2008-02-06 16:11:29 -08:00
openpromfs iget: stop OPENPROMFS from using iget() and read_inode() 2008-02-07 08:42:29 -08:00
partitions Block: Fix whole_disk attribute bug 2008-02-07 11:31:46 -08:00
proc iget: stop PROCFS from using iget() and read_inode() 2008-02-07 08:42:28 -08:00
qnx4 iget: stop QNX4 from using iget() and read_inode() 2008-02-07 08:42:28 -08:00
ramfs Remove valueless definition of hard-selected RAMFS option 2007-10-17 08:42:56 -07:00
reiserfs Convert ERR_PTR(PTR_ERR(p)) instances to ERR_CAST(p) 2008-02-07 08:42:26 -08:00
romfs iget: stop ROMFS from using iget() and read_inode() 2008-02-07 08:42:28 -08:00
smbfs smbfs: fix calculation of kernel_recvmsg size parameter in smb_receive() 2008-02-06 10:41:02 -08:00
sysfs sysfs: remove BUG_ON() from sysfs_remove_group() 2008-02-07 11:31:46 -08:00
sysv iget: stop the SYSV filesystem from using iget() and read_inode() 2008-02-07 08:42:29 -08:00
udf fs/udf/balloc.c: mark a variable as uninitialized_var() 2007-10-17 08:43:00 -07:00
ufs iget: stop UFS from using iget() and read_inode() 2008-02-07 08:42:29 -08:00
vfat Convert ERR_PTR(PTR_ERR(p)) instances to ERR_CAST(p) 2008-02-07 08:42:26 -08:00
xfs is_vmalloc_addr(): Check if an address is within the vmalloc boundaries 2008-02-05 09:44:14 -08:00
aio.c core: remove last users of empty FASTCALL macro 2008-01-30 13:31:17 +01:00
anon_inodes.c anon-inodes use open coded atomic_inc for the shared inode 2007-10-17 08:43:00 -07:00
attr.c VFS: make notify_change pass ATTR_KILL_S*ID to setattr operations 2007-10-18 14:37:22 -07:00
bad_inode.c iget: introduce a function to register iget failure 2008-02-07 08:42:26 -08:00
binfmt_aout.c Sanitize the type of struct user.u_ar0 2008-02-07 08:42:30 -08:00
binfmt_elf_fdpic.c pid namespaces: changes to show virtual ids to user 2007-10-19 11:53:40 -07:00
binfmt_elf.c brk randomization: introduce CONFIG_COMPAT_BRK 2008-02-06 22:39:44 +01:00
binfmt_em86.c Convert files to UTF-8 and some cleanups 2007-10-19 23:21:04 +02:00
binfmt_flat.c binfmt_flat: warning fixes 2007-10-17 08:42:54 -07:00
binfmt_misc.c Convert files to UTF-8 and some cleanups 2007-10-19 23:21:04 +02:00
binfmt_script.c Convert files to UTF-8 and some cleanups 2007-10-19 23:21:04 +02:00
binfmt_som.c core_pattern: ignore RLIMIT_CORE if core_pattern is a pipe 2007-10-17 08:42:50 -07:00
bio.c __bio_clone: don't calculate hw/phys segment counts 2008-01-28 10:04:46 +01:00
block_dev.c kill an unused PTR_ERR in bdev_cache_init() 2008-02-06 10:41:06 -08:00
buffer.c bufferhead: revert constructor removal 2008-02-05 09:44:14 -08:00
char_dev.c Kobject: rename kobject_init_ng() to kobject_init() 2008-01-24 20:40:38 -08:00
compat_binfmt_elf.c x86: compat_binfmt_elf 2008-01-30 13:31:46 +01:00
compat_ioctl.c VFS: swap do_ioctl and vfs_ioctl names 2008-02-07 08:42:16 -08:00
compat.c fs: remove dead config CONFIG_HAS_COMPAT_EPOLL_EVENT symbol 2008-02-06 10:41:03 -08:00
dcache.c inotify: remove debug code 2008-02-06 10:41:07 -08:00
dcookies.c
direct-io.c Pagecache zeroing: zero_user_segment, zero_user_segments and zero_user 2008-02-05 09:44:13 -08:00
dnotify.c
dquot.c quota: improve inode list scanning in add_dquot_ref() 2008-02-06 10:41:07 -08:00
drop_caches.c
eventfd.c fs/eventfd.c should #include <linux/syscalls.h> 2008-02-06 10:41:03 -08:00
eventpoll.c lockdep: annotate epoll 2008-02-05 09:44:07 -08:00
exec.c exec: rework the group exit and fix the race with kill 2008-02-05 09:44:07 -08:00
fcntl.c pid namespaces: changes to show virtual ids to user 2007-10-19 11:53:40 -07:00
fifo.c
file_table.c fs/file_table.c: use list_for_each_entry() instead of list_for_each() 2007-10-19 11:53:38 -07:00
file.c get rid of NR_OPEN and introduce a sysctl_nr_open 2008-02-06 10:41:06 -08:00
filesystems.c
fs-writeback.c fs: use list_for_each_entry_reverse and kill sb_entry 2008-02-06 10:41:05 -08:00
generic_acl.c
inode.c iget: remove iget() and the read_inode() super op as being obsolete 2008-02-07 08:42:29 -08:00
inotify_user.c SIGIO-driven I/O with inotify queues 2008-02-06 10:41:00 -08:00
inotify.c inotify: remove debug code 2008-02-06 10:41:07 -08:00
internal.h
ioctl.c VFS: factor out three helpers for FIBMAP/FIONBIO/FIOASYNC file ioctls 2008-02-07 08:42:16 -08:00
ioprio.c cfq-iosched: relax IOPRIO_CLASS_IDLE restrictions 2008-01-28 11:38:15 +01:00
Kconfig fs menu: small reorg 2008-02-07 08:42:24 -08:00
Kconfig.binfmt x86: compat_binfmt_elf Kconfig 2008-01-30 13:31:46 +01:00
libfs.c Pagecache zeroing: zero_user_segment, zero_user_segments and zero_user 2008-02-05 09:44:13 -08:00
locks.c pid-namespaces-vs-locks-interaction 2008-02-03 17:51:36 -05:00
Makefile x86: compat_binfmt_elf Kconfig 2008-01-30 13:31:46 +01:00
mbcache.c fs: Fix to correct the mbcache entries counter 2007-10-25 15:18:29 -07:00
mpage.c Pagecache zeroing: zero_user_segment, zero_user_segments and zero_user 2008-02-05 09:44:13 -08:00
namei.c inotify: send IN_ATTRIB events when link count changes 2008-02-06 10:41:05 -08:00
namespace.c Use ilog2() in fs/namespace.c 2008-02-06 10:41:09 -08:00
nfsctl.c
no-block.c
open.c mark sys_open/sys_read exports unused 2007-11-14 18:45:42 -08:00
pipe.c sched: affine sync wakeups 2007-10-15 17:00:19 +02:00
pnode.c MNT_UNBINDABLE fix 2008-02-06 10:41:02 -08:00
pnode.h [PATCH] new helpers - collect_mounts() and release_collected_mounts() 2007-10-21 02:37:25 -04:00
posix_acl.c
quota_v1.c
quota_v2.c
quota.c Convert ERR_PTR(PTR_ERR(p)) instances to ERR_CAST(p) 2008-02-07 08:42:26 -08:00
read_write.c ext4: export iov_shorten from kernel for ext4's use 2008-01-28 23:58:27 -05:00
read_write.h
readdir.c Use mutex_lock_killable in vfs_readdir 2007-12-06 17:39:54 -05:00
select.c make sys_poll() wait at least timeout ms 2008-02-06 10:41:09 -08:00
seq_file.c [FS] seq_file: Introduce the seq_open_private() 2007-10-10 16:55:33 -07:00
signalfd.c fs/signalfd.c should #include <linux/syscalls.h> 2008-02-06 10:41:03 -08:00
splice.c splice: always updated atime in direct splice 2008-02-01 09:26:32 +01:00
stack.c
stat.c
super.c Convert files to UTF-8 and some cleanups 2007-10-19 23:21:04 +02:00
sync.c
timerfd.c timerfd: new timerfd API 2008-02-05 09:44:07 -08:00
utimes.c fs/utimes.c should #include <linux/syscalls.h> 2008-02-06 10:41:03 -08:00
xattr_acl.c
xattr.c VFS: Reorder vfs_getxattr to avoid unnecessary calls to the LSM 2008-02-05 09:44:20 -08:00