linux-kernel - Re: [syzbot] [PATCH] Test np in autofs_fill

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Message-ID: <000000000000437473060a1365b7@google.com>
Date:   Mon, 13 Nov 2023 18:17:59 -0800
From:   syzbot <syzbot+662f87a8ef490f45fa64@...kaller.appspotmail.com>
To:     linux-kernel@...r.kernel.org
Subject: Re: [syzbot] [PATCH] Test np in autofs_fill_super

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Subject: [PATCH] Test np in autofs_fill_super
Author: eadavis@...com

please test null ptr in autofs_fill_super

#syz test https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git 4bbdb725a36b

diff --git a/fs/autofs/inode.c b/fs/autofs/inode.c
index a5083d447a62..f2e89a444edf 100644
--- a/fs/autofs/inode.c
+++ b/fs/autofs/inode.c
@@ -331,6 +331,9 @@ static int autofs_fill_super(struct super_block *s, struct fs_context *fc)
 		goto fail;
 
 	root_inode = autofs_get_inode(s, S_IFDIR | 0755);
+	if (!root_inode)
+		goto fail;
+
 	root_inode->i_uid = ctx->uid;
 	root_inode->i_gid = ctx->gid;