linux/fs/overlayfs
Amir Goldstein 898cc19d8a ovl: fix freeze protection bypass in ovl_write_iter()
Tested by re-writing to an open overlayfs file while upper ext4 is frozen:

  xfs_io -f /ovl/x
  xfs_io> pwrite 0 4096
                             fsfreeze -f /ext4
  xfs_io> pwrite 0 4096

  WARNING: CPU: 0 PID: 1492 at fs/ext4/ext4_jbd2.c:53 \
           ext4_journal_check_start+0x48/0x82

After the fix, the second write blocks in ovl_write_iter() and avoids
hitting WARN_ON(sb->s_writers.frozen == SB_FREEZE_COMPLETE) in
ext4_journal_check_start().

Fixes: 2a92e07edc ("ovl: add ovl_write_iter()")
Signed-off-by: Amir Goldstein <amir73il@gmail.com>
Signed-off-by: Miklos Szeredi <mszeredi@redhat.com>
2018-09-24 10:54:01 +02:00
..
copy_up.c ovl: Enable metadata only feature 2018-07-20 09:56:17 +02:00
dir.c ovl: set I_CREATING on inode being created 2018-08-22 13:15:25 -07:00
export.c ovl: Modify ovl_lookup() and friends to lookup metacopy dentry 2018-07-20 09:56:09 +02:00
file.c ovl: fix freeze protection bypass in ovl_write_iter() 2018-09-24 10:54:01 +02:00
inode.c ovl: fix GPF in swapfile_activate of file from overlayfs over xfs 2018-08-30 17:08:35 +02:00
Kconfig ovl: Provide a mount option metacopy=on/off for metadata copyup 2018-07-20 09:56:06 +02:00
Makefile ovl: stack file ops 2018-07-18 15:44:41 +02:00
namei.c ovl: Check redirect on index as well 2018-07-20 09:56:16 +02:00
overlayfs.h ovl: add helper to force data copy-up 2018-07-20 09:56:16 +02:00
ovl_entry.h ovl: Store lower data inode in ovl_inode 2018-07-20 09:56:11 +02:00
readdir.c ovl: fix wrong use of impure dir cache in ovl_iterate() 2018-07-17 16:04:34 +02:00
super.c ovl: fix oopses in ovl_fill_super() failure paths 2018-09-10 12:55:49 +02:00
util.c ovl: fix memory leak on unlink of indexed file 2018-09-24 10:54:01 +02:00