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| author | Ernesto A. Fernández <ernesto.mnd.fernandez@gmail.com> | 2018-08-23 17:00:31 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2018-08-23 18:48:42 -0700 |
| commit | dc2572791d3a41bab94400af2b6bca9d71ccd303 (patch) | |
| tree | a4af5550de3b74fba3deff00c78053518b13f808 | |
| parent | aba93a92f49a002e2251e1745994c762cee01843 (diff) | |
| download | linux-dc2572791d3a41bab94400af2b6bca9d71ccd303.tar.gz linux-dc2572791d3a41bab94400af2b6bca9d71ccd303.tar.bz2 linux-dc2572791d3a41bab94400af2b6bca9d71ccd303.zip | |
hfs: prevent crash on exit from failed search
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>
| -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 ad04a5741016..9a8772465a90 100644 --- a/fs/hfs/brec.c +++ b/fs/hfs/brec.c @@ -75,9 +75,10 @@ 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; |