4.9-stable review patch. If anyone has any objections, please let me know. ------------------ From: Jan Kara <jack@xxxxxxx> commit d3ca4651d05c0ff7259d087d8c949bcf3e14fb46 upstream. When truncate(2) hits IO error when reading indirect extent block the code just bugs with: kernel BUG at linux-4.15.0/fs/udf/truncate.c:249! ... Fix the problem by bailing out cleanly in case of IO error. CC: stable@xxxxxxxxxxxxxxx Reported-by: jean-luc malet <jeanluc.malet@xxxxxxxxx> Signed-off-by: Jan Kara <jack@xxxxxxx> Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx> --- fs/udf/truncate.c | 3 +++ 1 file changed, 3 insertions(+) --- a/fs/udf/truncate.c +++ b/fs/udf/truncate.c @@ -260,6 +260,9 @@ void udf_truncate_extents(struct inode * epos.block = eloc; epos.bh = udf_tread(sb, udf_get_lb_pblock(sb, &eloc, 0)); + /* Error reading indirect block? */ + if (!epos.bh) + return; if (elen) indirect_ext_len = (elen + sb->s_blocksize - 1) >>
