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| author | Ernesto A. Fernández <ernesto.mnd.fernandez@gmail.com> | 2018-08-24 03:00:31 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2018-09-26 09:33:50 +0300 |
| commit | 5bbef604bfefc84feb7358df53e1e1a3e1866166 (patch) | |
| tree | a2a390eefb0bdb0d7489d2686bc3d44d40df8465 | |
| parent | 8224be03ade3f5c17ed2533f26eaf4ef41312425 (diff) | |
| download | linux-5bbef604bfefc84feb7358df53e1e1a3e1866166.tar.xz | |
hfs: prevent crash on exit from failed search
[ Upstream commit dc2572791d3a41bab94400af2b6bca9d71ccd303 ]
hfs_find_exit() expects fd->bnode to be NULL after a search has failed.
hfs_brec_insert() may instead set it to an error-valued pointer. Fix
this to prevent a crash.
Link: http://lkml.kernel.org/r/53d9749a029c41b4016c495fc5838c9dba3afc52.1530294815.git.ernesto.mnd.fernandez@gmail.com
Signed-off-by: Ernesto A. Fernández <ernesto.mnd.fernandez@gmail.com>
Cc: Anatoly Trosinenko <anatoly.trosinenko@gmail.com>
Cc: Viacheslav Dubeyko <slava@dubeyko.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Sasha Levin <alexander.levin@microsoft.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
| -rw-r--r-- | fs/hfs/brec.c | 7 |
1 files changed, 4 insertions, 3 deletions
diff --git a/fs/hfs/brec.c b/fs/hfs/brec.c index 6fc766df0461..2a6f3c67cb3f 100644 --- a/fs/hfs/brec.c +++ b/fs/hfs/brec.c @@ -74,9 +74,10 @@ int hfs_brec_insert(struct hfs_find_data *fd, void *entry, int entry_len) if (!fd->bnode) { if (!tree->root) hfs_btree_inc_height(tree); - fd->bnode = hfs_bnode_find(tree, tree->leaf_head); - if (IS_ERR(fd->bnode)) - return PTR_ERR(fd->bnode); + node = hfs_bnode_find(tree, tree->leaf_head); + if (IS_ERR(node)) + return PTR_ERR(node); + fd->bnode = node; fd->record = -1; } new_node = NULL; |