Files
linux/fs
Hou Tao ef704a9c1f jffs2: free jffs2_sb_info through jffs2_kill_sb()
commit 92e2921f7e upstream.

When an invalid mount option is passed to jffs2, jffs2_parse_options()
will fail and jffs2_sb_info will be freed, but then jffs2_sb_info will
be used (use-after-free) and freeed (double-free) in jffs2_kill_sb().

Fix it by removing the buggy invocation of kfree() when getting invalid
mount options.

Fixes: 92abc475d8 ("jffs2: implement mount option parsing and compression overriding")
Cc: stable@kernel.org
Signed-off-by: Hou Tao <houtao1@huawei.com>
Reviewed-by: Richard Weinberger <richard@nod.at>
Signed-off-by: Boris Brezillon <boris.brezillon@bootlin.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2023-05-15 09:18:54 +09:00
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