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author | Ernesto A. Fernández <ernesto.mnd.fernandez@gmail.com> | 2018-10-30 23:06:04 +0100 |
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committer | Linus Torvalds <torvalds@linux-foundation.org> | 2018-10-31 16:54:13 +0100 |
commit | 19a9d0f1acf75e8be8cfba19c1a34e941846fa2b (patch) | |
tree | 93f64242573ca2cd56d40299a22c2941231efeab /usr | |
parent | hfsplus: prevent btree data loss on root split (diff) | |
download | linux-19a9d0f1acf75e8be8cfba19c1a34e941846fa2b.tar.xz linux-19a9d0f1acf75e8be8cfba19c1a34e941846fa2b.zip |
hfsplus: fix BUG on bnode parent update
Creating, renaming or deleting a file may hit BUG_ON() if the first
record of both a leaf node and its parent are changed, and if this
forces the parent to be split. This bug is triggered by xfstests
generic/027, somewhat rarely; here is a more reliable reproducer:
truncate -s 50M fs.iso
mkfs.hfsplus fs.iso
mount fs.iso /mnt
i=1000
while [ $i -le 2400 ]; do
touch /mnt/$i &>/dev/null
((++i))
done
i=2400
while [ $i -ge 1000 ]; do
mv /mnt/$i /mnt/$(perl -e "print $i x61") &>/dev/null
((--i))
done
The issue is that a newly created bnode is being put twice. Reset
new_node to NULL in hfs_brec_update_parent() before reaching goto again.
Link: http://lkml.kernel.org/r/5ee1db09b60373a15890f6a7c835d00e76bf601d.1535682461.git.ernesto.mnd.fernandez@gmail.com
Signed-off-by: Ernesto A. Fernández <ernesto.mnd.fernandez@gmail.com>
Cc: Christoph Hellwig <hch@infradead.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'usr')
0 files changed, 0 insertions, 0 deletions