From: Ernesto A. Fernandez Date: Fri, 24 Aug 2018 00:00:28 +0000 (-0700) Subject: hfsplus: prevent crash on exit from failed search X-Git-Tag: v5.15~8121^2~20 X-Git-Url: https://git.proxmox.com/?a=commitdiff_plain;h=aba93a92f49a002e2251e1745994c762cee01843;p=mirror_ubuntu-kernels.git 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 Reported-by: Anatoly Trosinenko Reviewed-by: Vyacheslav Dubeyko Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- 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;