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author | Hin-Tak Leung <htl10@users.sourceforge.net> | 2015-09-10 00:38:07 +0200 |
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committer | Linus Torvalds <torvalds@linux-foundation.org> | 2015-09-10 22:29:01 +0200 |
commit | b4cc0efea4f0bfa2477c56af406cfcf3d3e58680 (patch) | |
tree | ce77f4bb0f58aecc33d087444bdf7283769ee7c9 /fs/hfs/brec.c | |
parent | hfs,hfsplus: cache pages correctly between bnode_create and bnode_free (diff) | |
download | linux-b4cc0efea4f0bfa2477c56af406cfcf3d3e58680.tar.xz linux-b4cc0efea4f0bfa2477c56af406cfcf3d3e58680.zip |
hfs: fix B-tree corruption after insertion at position 0
Fix B-tree corruption when a new record is inserted at position 0 in the
node in hfs_brec_insert().
This is an identical change to the corresponding hfs b-tree code to Sergei
Antonov's "hfsplus: fix B-tree corruption after insertion at position 0",
to keep similar code paths in the hfs and hfsplus drivers in sync, where
appropriate.
Signed-off-by: Hin-Tak Leung <htl10@users.sourceforge.net>
Cc: Sergei Antonov <saproj@gmail.com>
Cc: Joe Perches <joe@perches.com>
Reviewed-by: Vyacheslav Dubeyko <slava@dubeyko.com>
Cc: Anton Altaparmakov <anton@tuxera.com>
Cc: Al Viro <viro@zeniv.linux.org.uk>
Cc: Christoph Hellwig <hch@infradead.org>
Cc: <stable@vger.kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'fs/hfs/brec.c')
-rw-r--r-- | fs/hfs/brec.c | 20 |
1 files changed, 11 insertions, 9 deletions
diff --git a/fs/hfs/brec.c b/fs/hfs/brec.c index 9f4ee7f52026..6fc766df0461 100644 --- a/fs/hfs/brec.c +++ b/fs/hfs/brec.c @@ -131,13 +131,16 @@ skip: hfs_bnode_write(node, entry, data_off + key_len, entry_len); hfs_bnode_dump(node); - if (new_node) { - /* update parent key if we inserted a key - * at the start of the first node - */ - if (!rec && new_node != node) - hfs_brec_update_parent(fd); + /* + * update parent key if we inserted a key + * at the start of the node and it is not the new node + */ + if (!rec && new_node != node) { + hfs_bnode_read_key(node, fd->search_key, data_off + size); + hfs_brec_update_parent(fd); + } + if (new_node) { hfs_bnode_put(fd->bnode); if (!new_node->parent) { hfs_btree_inc_height(tree); @@ -166,9 +169,6 @@ skip: goto again; } - if (!rec) - hfs_brec_update_parent(fd); - return 0; } @@ -366,6 +366,8 @@ again: if (IS_ERR(parent)) return PTR_ERR(parent); __hfs_brec_find(parent, fd); + if (fd->record < 0) + return -ENOENT; hfs_bnode_dump(parent); rec = fd->record; |