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linux/fs/ocfs2
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Junxiao Bi 6bba4471f0 ocfs2: fix data corruption by fallocate 
When fallocate punches holes out of inode size, if original isize is in
the middle of last cluster, then the part from isize to the end of the
cluster will be zeroed with buffer write, at that time isize is not yet
updated to match the new size, if writeback is kicked in, it will invoke
ocfs2_writepage()->block_write_full_page() where the pages out of inode
size will be dropped.  That will cause file corruption.  Fix this by
zero out eof blocks when extending the inode size.

Running the following command with qemu-image 4.2.1 can get a corrupted
coverted image file easily.

    qemu-img convert -p -t none -T none -f qcow2 $qcow_image \
             -O qcow2 -o compat=1.1 $qcow_image.conv

The usage of fallocate in qemu is like this, it first punches holes out
of inode size, then extend the inode size.

    fallocate(11, FALLOC_FL_KEEP_SIZE|FALLOC_FL_PUNCH_HOLE, 2276196352, 65536) = 0
    fallocate(11, 0, 2276196352, 65536) = 0

v1: https://www.spinics.net/lists/linux-fsdevel/msg193999.html
v2: https://lore.kernel.org/linux-fsdevel/20210525093034.GB4112@quack2.suse.cz/T/

Link: https://lkml.kernel.org/r/20210528210648.9124-1-junxiao.bi@oracle.com
Signed-off-by: Junxiao Bi <junxiao.bi@oracle.com>
Reviewed-by: Joseph Qi <joseph.qi@linux.alibaba.com>
Cc: Jan Kara <jack@suse.cz>
Cc: Mark Fasheh <mark@fasheh.com>
Cc: Joel Becker <jlbec@evilplan.org>
Cc: Changwei Ge <gechangwei@live.cn>
Cc: Gang He <ghe@suse.com>
Cc: Jun Piao <piaojun@huawei.com>
Cc: <stable@vger.kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2021-06-05 08:58:12 -07:00
..
cluster treewide: remove editor modelines and cruft 2021-05-07 00:26:34 -07:00
dlm treewide: remove editor modelines and cruft 2021-05-07 00:26:34 -07:00
dlmfs treewide: remove editor modelines and cruft 2021-05-07 00:26:34 -07:00
acl.c treewide: remove editor modelines and cruft 2021-05-07 00:26:34 -07:00
acl.h treewide: remove editor modelines and cruft 2021-05-07 00:26:34 -07:00
alloc.c treewide: remove editor modelines and cruft 2021-05-07 00:26:34 -07:00
alloc.h treewide: remove editor modelines and cruft 2021-05-07 00:26:34 -07:00
aops.c treewide: remove editor modelines and cruft 2021-05-07 00:26:34 -07:00
aops.h treewide: remove editor modelines and cruft 2021-05-07 00:26:34 -07:00
blockcheck.c treewide: remove editor modelines and cruft 2021-05-07 00:26:34 -07:00
blockcheck.h treewide: remove editor modelines and cruft 2021-05-07 00:26:34 -07:00
buffer_head_io.c treewide: remove editor modelines and cruft 2021-05-07 00:26:34 -07:00
buffer_head_io.h treewide: remove editor modelines and cruft 2021-05-07 00:26:34 -07:00
dcache.c treewide: remove editor modelines and cruft 2021-05-07 00:26:34 -07:00
dcache.h treewide: remove editor modelines and cruft 2021-05-07 00:26:34 -07:00
dir.c treewide: remove editor modelines and cruft 2021-05-07 00:26:34 -07:00
dir.h treewide: remove editor modelines and cruft 2021-05-07 00:26:34 -07:00
dlmglue.c treewide: remove editor modelines and cruft 2021-05-07 00:26:34 -07:00
dlmglue.h treewide: remove editor modelines and cruft 2021-05-07 00:26:34 -07:00
export.c treewide: remove editor modelines and cruft 2021-05-07 00:26:34 -07:00
export.h treewide: remove editor modelines and cruft 2021-05-07 00:26:34 -07:00
extent_map.c treewide: remove editor modelines and cruft 2021-05-07 00:26:34 -07:00
extent_map.h treewide: remove editor modelines and cruft 2021-05-07 00:26:34 -07:00
file.c ocfs2: fix data corruption by fallocate 2021-06-05 08:58:12 -07:00
file.h treewide: remove editor modelines and cruft 2021-05-07 00:26:34 -07:00
filecheck.c treewide: remove editor modelines and cruft 2021-05-07 00:26:34 -07:00
filecheck.h treewide: remove editor modelines and cruft 2021-05-07 00:26:34 -07:00
heartbeat.c treewide: remove editor modelines and cruft 2021-05-07 00:26:34 -07:00
heartbeat.h treewide: remove editor modelines and cruft 2021-05-07 00:26:34 -07:00
inode.c treewide: remove editor modelines and cruft 2021-05-07 00:26:34 -07:00
inode.h treewide: remove editor modelines and cruft 2021-05-07 00:26:34 -07:00
ioctl.c ocfs2: convert to fileattr 2021-04-12 15:04:30 +02:00
ioctl.h ocfs2: convert to fileattr 2021-04-12 15:04:30 +02:00
journal.c treewide: remove editor modelines and cruft 2021-05-07 00:26:34 -07:00
journal.h treewide: remove editor modelines and cruft 2021-05-07 00:26:34 -07:00
Kconfig ocfs2: replace HTTP links with HTTPS ones 2020-08-07 11:33:22 -07:00
localalloc.c treewide: remove editor modelines and cruft 2021-05-07 00:26:34 -07:00
localalloc.h treewide: remove editor modelines and cruft 2021-05-07 00:26:34 -07:00
locks.c treewide: remove editor modelines and cruft 2021-05-07 00:26:34 -07:00
locks.h treewide: remove editor modelines and cruft 2021-05-07 00:26:34 -07:00
Makefile ocfs2: improve ocfs2 Makefile 2018-12-28 12:11:45 -08:00
mmap.c treewide: remove editor modelines and cruft 2021-05-07 00:26:34 -07:00
mmap.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
move_extents.c treewide: remove editor modelines and cruft 2021-05-07 00:26:34 -07:00
move_extents.h treewide: remove editor modelines and cruft 2021-05-07 00:26:34 -07:00
namei.c treewide: remove editor modelines and cruft 2021-05-07 00:26:34 -07:00
namei.h treewide: remove editor modelines and cruft 2021-05-07 00:26:34 -07:00
ocfs1_fs_compat.h treewide: remove editor modelines and cruft 2021-05-07 00:26:34 -07:00
ocfs2.h treewide: remove editor modelines and cruft 2021-05-07 00:26:34 -07:00
ocfs2_fs.h treewide: remove editor modelines and cruft 2021-05-07 00:26:34 -07:00
ocfs2_ioctl.h treewide: remove editor modelines and cruft 2021-05-07 00:26:34 -07:00
ocfs2_lockid.h treewide: remove editor modelines and cruft 2021-05-07 00:26:34 -07:00
ocfs2_lockingver.h treewide: remove editor modelines and cruft 2021-05-07 00:26:34 -07:00
ocfs2_trace.h ocfs2: fix the application IO timeout when fstrim is running 2019-03-05 21:07:13 -08:00
quota.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
quota_global.c quota: Check that quota is not dirty before release 2019-10-31 19:07:42 +01:00
quota_local.c ocfs2: return -EROFS when filesystem becomes read-only 2018-08-17 16:20:27 -07:00
refcounttree.c treewide: remove editor modelines and cruft 2021-05-07 00:26:34 -07:00
refcounttree.h treewide: remove editor modelines and cruft 2021-05-07 00:26:34 -07:00
reservations.c treewide: remove editor modelines and cruft 2021-05-07 00:26:34 -07:00
reservations.h treewide: remove editor modelines and cruft 2021-05-07 00:26:34 -07:00
resize.c treewide: remove editor modelines and cruft 2021-05-07 00:26:34 -07:00
resize.h treewide: remove editor modelines and cruft 2021-05-07 00:26:34 -07:00
slot_map.c treewide: remove editor modelines and cruft 2021-05-07 00:26:34 -07:00
slot_map.h treewide: remove editor modelines and cruft 2021-05-07 00:26:34 -07:00
stack_o2cb.c treewide: remove editor modelines and cruft 2021-05-07 00:26:34 -07:00
stack_user.c treewide: remove editor modelines and cruft 2021-05-07 00:26:34 -07:00
stackglue.c treewide: remove editor modelines and cruft 2021-05-07 00:26:34 -07:00
stackglue.h treewide: remove editor modelines and cruft 2021-05-07 00:26:34 -07:00
suballoc.c treewide: remove editor modelines and cruft 2021-05-07 00:26:34 -07:00
suballoc.h treewide: remove editor modelines and cruft 2021-05-07 00:26:34 -07:00
super.c treewide: remove editor modelines and cruft 2021-05-07 00:26:34 -07:00
super.h treewide: remove editor modelines and cruft 2021-05-07 00:26:34 -07:00
symlink.c treewide: remove editor modelines and cruft 2021-05-07 00:26:34 -07:00
symlink.h treewide: remove editor modelines and cruft 2021-05-07 00:26:34 -07:00
sysfile.c treewide: remove editor modelines and cruft 2021-05-07 00:26:34 -07:00
sysfile.h treewide: remove editor modelines and cruft 2021-05-07 00:26:34 -07:00
uptodate.c treewide: remove editor modelines and cruft 2021-05-07 00:26:34 -07:00
uptodate.h treewide: remove editor modelines and cruft 2021-05-07 00:26:34 -07:00
xattr.c treewide: remove editor modelines and cruft 2021-05-07 00:26:34 -07:00
xattr.h treewide: remove editor modelines and cruft 2021-05-07 00:26:34 -07:00