4.9-stable review patch. If anyone has any objections, please let me know.
------------------ From: Richard Narron <comet.berke...@gmail.com> commit 239e250e4acbc0104d514307029c0839e834a51a upstream. This fixes a problem with reading files larger than 2GB from a UFS-2 file system: https://bugzilla.kernel.org/show_bug.cgi?id=195721 The incorrect UFS s_maxsize limit became a problem as of commit c2a9737f45e2 ("vfs,mm: fix a dead loop in truncate_inode_pages_range()") which started using s_maxbytes to avoid a page index overflow in do_generic_file_read(). That caused files to be truncated on UFS-2 file systems because the default maximum file size is 2GB (MAX_NON_LFS) and UFS didn't update it. Here I simply increase the default to a common value used by other file systems. Signed-off-by: Richard Narron <comet.berke...@gmail.com> Cc: Al Viro <v...@zeniv.linux.org.uk> Cc: Will B <will.brokenbourgh2...@gmail.com> Cc: Theodore Ts'o <ty...@mit.edu> Signed-off-by: Linus Torvalds <torva...@linux-foundation.org> Signed-off-by: Greg Kroah-Hartman <gre...@linuxfoundation.org> --- fs/ufs/super.c | 5 ++--- 1 file changed, 2 insertions(+), 3 deletions(-) --- a/fs/ufs/super.c +++ b/fs/ufs/super.c @@ -812,9 +812,8 @@ static int ufs_fill_super(struct super_b uspi->s_dirblksize = UFS_SECTOR_SIZE; super_block_offset=UFS_SBLOCK; - /* Keep 2Gig file limit. Some UFS variants need to override - this but as I don't know which I'll let those in the know loosen - the rules */ + sb->s_maxbytes = MAX_LFS_FILESIZE; + switch (sbi->s_mount_opt & UFS_MOUNT_UFSTYPE) { case UFS_MOUNT_UFSTYPE_44BSD: UFSD("ufstype=44bsd\n");