4.13-stable review patch. If anyone has any objections, please let me know. ------------------ From: Darrick J. Wong <darrick.wong@xxxxxxxxxx> commit 1bd8d6cd3e413d64e543ec3e69ff43e75a1cf1ea upstream. In the ext4 implementations of SEEK_HOLE and SEEK_DATA, make sure we return -ENXIO for negative offsets instead of banging around inside the extent code and returning -EFSCORRUPTED. Reported-by: Mateusz S <muttdini@xxxxxxxxx> Signed-off-by: Darrick J. Wong <darrick.wong@xxxxxxxxxx> Signed-off-by: Theodore Ts'o <tytso@xxxxxxx> Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx> --- fs/ext4/file.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) --- a/fs/ext4/file.c +++ b/fs/ext4/file.c @@ -595,7 +595,7 @@ static loff_t ext4_seek_data(struct file inode_lock(inode); isize = i_size_read(inode); - if (offset >= isize) { + if (offset < 0 || offset >= isize) { inode_unlock(inode); return -ENXIO; } @@ -658,7 +658,7 @@ static loff_t ext4_seek_hole(struct file inode_lock(inode); isize = i_size_read(inode); - if (offset >= isize) { + if (offset < 0 || offset >= isize) { inode_unlock(inode); return -ENXIO; }