Commit 92477062 authored Mar 11, 2019 by Jan Kara Committed by Greg Kroah-Hartman Mar 27, 2019

udf: Fix crash on IO error during truncate



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@vger.kernel.org
Reported-by: jean-luc malet <jeanluc.malet@gmail.com>
Signed-off-by: Jan Kara <jack@suse.cz>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

parent 9c32ada4

fs/udf/truncate.c

+3 −0

Original line number	Diff line number	Diff line
		@@ -260,6 +260,9 @@ void udf_truncate_extents(struct inode *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) >>