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| author | Eric Biggers <ebiggers@google.com> | 2017-12-08 18:13:29 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2017-12-14 11:52:53 +0300 |
| commit | 28e7c9a8e548c8c7e839f6ae1e21d61dc92308b0 (patch) | |
| tree | 8bcaa193ac1cc2e3ddedb2171a2342404ff8560d /crypto | |
| parent | 69d5894ce0a67d37f900d2597fc0b2b8cef6c863 (diff) | |
| download | linux-28e7c9a8e548c8c7e839f6ae1e21d61dc92308b0.tar.xz | |
KEYS: reject NULL restriction string when type is specified
commit 18026d866801d0c52e5550210563222bd6c7191d upstream.
keyctl_restrict_keyring() allows through a NULL restriction when the
"type" is non-NULL, which causes a NULL pointer dereference in
asymmetric_lookup_restriction() when it calls strcmp() on the
restriction string.
But no key types actually use a "NULL restriction" to mean anything, so
update keyctl_restrict_keyring() to reject it with EINVAL.
Reported-by: syzbot <syzkaller@googlegroups.com>
Fixes: 97d3aa0f3134 ("KEYS: Add a lookup_restriction function for the asymmetric key type")
Signed-off-by: Eric Biggers <ebiggers@google.com>
Signed-off-by: David Howells <dhowells@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'crypto')
0 files changed, 0 insertions, 0 deletions