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| author |   Ernesto A. Fernandez <ernesto.mnd.fernandez@gmail.com> | 2018-08-23 17:00:28 -0700 |
|---|---|---|
| committer |   Linus Torvalds <torvalds@linux-foundation.org> | 2018-08-23 18:48:42 -0700 |
| commit | aba93a92f49a002e2251e1745994c762cee01843 (patch) | |
| tree | d8d9be3fd528099ddabde712850029c72658cdaa /fs/hfsplus | |
| parent | hfsplus: fix NULL dereference in hfsplus_lookup() (diff) | |
| download | linux-dev-aba93a92f49a002e2251e1745994c762cee01843.tar.xz linux-dev-aba93a92f49a002e2251e1745994c762cee01843.zip | |
hfsplus: 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/803590a35221fbf411b2c141419aea3233a6e990.1530294813.git.ernesto.mnd.fernandez@gmail.com
Signed-off-by: Ernesto A. Fernandez <ernesto.mnd.fernandez@gmail.com>
Reported-by: Anatoly Trosinenko <anatoly.trosinenko@gmail.com>
Reviewed-by: Vyacheslav Dubeyko <slava@dubeyko.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'fs/hfsplus')
| -rw-r--r-- | fs/hfsplus/brec.c | 7 |
1 files changed, 4 insertions, 3 deletions
diff --git a/fs/hfsplus/brec.c b/fs/hfsplus/brec.c index 808f4d8c859c..ed8eacb34452 100644 --- a/fs/hfsplus/brec.c +++ b/fs/hfsplus/brec.c @@ -73,9 +73,10 @@ 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; |