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authorJan Kara <jack@suse.cz>2019-03-11 17:04:18 +0300
committerJan Kara <jack@suse.cz>2019-03-18 18:29:52 +0300
commitd3ca4651d05c0ff7259d087d8c949bcf3e14fb46 (patch)
tree9a04ef010a6bd97547fe68d0f0ce55213612ab29
parent9e98c678c2d6ae3a17cb2de55d17f69dddaa231b (diff)
downloadlinux-d3ca4651d05c0ff7259d087d8c949bcf3e14fb46.tar.xz
udf: Fix crash on IO error during truncate
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>
-rw-r--r--fs/udf/truncate.c3
1 files changed, 3 insertions, 0 deletions
diff --git a/fs/udf/truncate.c b/fs/udf/truncate.c
index b647f0bd150c..94220ba85628 100644
--- a/fs/udf/truncate.c
+++ b/fs/udf/truncate.c
@@ -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) >>