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ovl: Fix dereferencing possible ERR_PTR()
authorDing Xiang <dingxiang@cmss.chinamobile.com>
Mon, 9 Sep 2019 08:29:56 +0000 (16:29 +0800)
committerMiklos Szeredi <mszeredi@redhat.com>
Wed, 11 Sep 2019 14:11:45 +0000 (16:11 +0200)
commit97f024b9171e74c4443bbe8a8dce31b917f97ac5
treee9270122b31d9d5a1e9d28f5c7e6bb0c8ce35ec3
parent0be0bfd2de9dfdd2098a9c5b14bdd8f739c9165d
ovl: Fix dereferencing possible ERR_PTR()

if ovl_encode_real_fh() fails, no memory was allocated
and the error in the error-valued pointer should be returned.

Fixes: 9b6faee07470 ("ovl: check ERR_PTR() return value from ovl_encode_fh()")
Signed-off-by: Ding Xiang <dingxiang@cmss.chinamobile.com>
Cc: <stable@vger.kernel.org> # v4.16+
Signed-off-by: Miklos Szeredi <mszeredi@redhat.com>
fs/overlayfs/export.c