From: "Jason A. Donenfeld" <Jason@zx2c4.com> To: Theodore Ts'o <tytso@mit.edu>, Linux Crypto Mailing List <linux-crypto@vger.kernel.org>, LKML <linux-kernel@vger.kernel.org>, kernel-hardening@lists.openwall.com, Greg Kroah-Hartman <gregkh@linuxfoundation.org>, David Miller <davem@davemloft.net>, Eric Biggers <ebiggers3@gmail.com> Cc: "Jason A. Donenfeld" <Jason@zx2c4.com>, Ilya Dryomov <idryomov@gmail.com>, "Yan, Zheng" <zyan@redhat.com>, Sage Weil <sage@redhat.com> Subject: [PATCH v4 07/13] ceph: ensure RNG is seeded before using Date: Tue, 6 Jun 2017 19:47:58 +0200 [thread overview] Message-ID: <20170606174804.31124-8-Jason@zx2c4.com> (raw) In-Reply-To: <20170606174804.31124-1-Jason@zx2c4.com> Ceph uses the RNG for various nonce generations, and it shouldn't accept using bad randomness. So, we wait for the RNG to be properly seeded. We do this by calling wait_for_random_bytes() in a function that is certainly called in process context, early on, so that all subsequent calls to get_random_bytes are necessarily acceptable. Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com> Cc: Ilya Dryomov <idryomov@gmail.com> Cc: "Yan, Zheng" <zyan@redhat.com> Cc: Sage Weil <sage@redhat.com> --- net/ceph/ceph_common.c | 6 +++++- 1 file changed, 5 insertions(+), 1 deletion(-) diff --git a/net/ceph/ceph_common.c b/net/ceph/ceph_common.c index 4fd02831beed..26ab58665f77 100644 --- a/net/ceph/ceph_common.c +++ b/net/ceph/ceph_common.c @@ -611,7 +611,11 @@ struct ceph_client *ceph_create_client(struct ceph_options *opt, void *private) { struct ceph_client *client; struct ceph_entity_addr *myaddr = NULL; - int err = -ENOMEM; + int err; + + err = wait_for_random_bytes(); + if (err < 0) + return ERR_PTR(err); client = kzalloc(sizeof(*client), GFP_KERNEL); if (client == NULL) -- 2.13.0
WARNING: multiple messages have this Message-ID (diff)
From: "Jason A. Donenfeld" <Jason@zx2c4.com> To: Theodore Ts'o <tytso@mit.edu>, Linux Crypto Mailing List <linux-crypto@vger.kernel.org>, LKML <linux-kernel@vger.kernel.org>, kernel-hardening@lists.openwall.com, Greg Kroah-Hartman <gregkh@linuxfoundation.org>, David Miller <davem@davemloft.net>, Eric Biggers <ebiggers3@gmail.com> Cc: "Jason A. Donenfeld" <Jason@zx2c4.com>, Ilya Dryomov <idryomov@gmail.com>, "Yan, Zheng" <zyan@redhat.com>, Sage Weil <sage@redhat.com> Subject: [kernel-hardening] [PATCH v4 07/13] ceph: ensure RNG is seeded before using Date: Tue, 6 Jun 2017 19:47:58 +0200 [thread overview] Message-ID: <20170606174804.31124-8-Jason@zx2c4.com> (raw) In-Reply-To: <20170606174804.31124-1-Jason@zx2c4.com> Ceph uses the RNG for various nonce generations, and it shouldn't accept using bad randomness. So, we wait for the RNG to be properly seeded. We do this by calling wait_for_random_bytes() in a function that is certainly called in process context, early on, so that all subsequent calls to get_random_bytes are necessarily acceptable. Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com> Cc: Ilya Dryomov <idryomov@gmail.com> Cc: "Yan, Zheng" <zyan@redhat.com> Cc: Sage Weil <sage@redhat.com> --- net/ceph/ceph_common.c | 6 +++++- 1 file changed, 5 insertions(+), 1 deletion(-) diff --git a/net/ceph/ceph_common.c b/net/ceph/ceph_common.c index 4fd02831beed..26ab58665f77 100644 --- a/net/ceph/ceph_common.c +++ b/net/ceph/ceph_common.c @@ -611,7 +611,11 @@ struct ceph_client *ceph_create_client(struct ceph_options *opt, void *private) { struct ceph_client *client; struct ceph_entity_addr *myaddr = NULL; - int err = -ENOMEM; + int err; + + err = wait_for_random_bytes(); + if (err < 0) + return ERR_PTR(err); client = kzalloc(sizeof(*client), GFP_KERNEL); if (client == NULL) -- 2.13.0
next prev parent reply other threads:[~2017-06-06 17:47 UTC|newest] Thread overview: 109+ messages / expand[flat|nested] mbox.gz Atom feed top 2017-06-06 17:47 [PATCH v4 00/13] Unseeded In-Kernel Randomness Fixes Jason A. Donenfeld 2017-06-06 17:47 ` [kernel-hardening] " Jason A. Donenfeld 2017-06-06 17:47 ` [PATCH v4 01/13] random: invalidate batched entropy after crng init Jason A. Donenfeld 2017-06-06 17:47 ` [kernel-hardening] " Jason A. Donenfeld 2017-06-07 23:58 ` Theodore Ts'o 2017-06-07 23:58 ` [kernel-hardening] " Theodore Ts'o 2017-06-08 0:52 ` Jason A. Donenfeld 2017-06-08 0:52 ` [kernel-hardening] " Jason A. Donenfeld 2017-06-06 17:47 ` [PATCH v4 02/13] random: add synchronous API for the urandom pool Jason A. Donenfeld 2017-06-06 17:47 ` [kernel-hardening] " Jason A. Donenfeld 2017-06-08 0:00 ` Theodore Ts'o 2017-06-08 0:00 ` [kernel-hardening] " Theodore Ts'o 2017-06-06 17:47 ` [PATCH v4 03/13] random: add get_random_{bytes,u32,u64,int,long,once}_wait family Jason A. Donenfeld 2017-06-06 17:47 ` [kernel-hardening] " Jason A. Donenfeld 2017-06-08 0:05 ` Theodore Ts'o 2017-06-06 17:47 ` [PATCH v4 04/13] security/keys: ensure RNG is seeded before use Jason A. Donenfeld 2017-06-06 17:47 ` [kernel-hardening] " Jason A. Donenfeld 2017-06-08 0:31 ` Theodore Ts'o 2017-06-08 0:31 ` [kernel-hardening] " Theodore Ts'o 2017-06-08 0:50 ` Jason A. Donenfeld 2017-06-08 0:50 ` [kernel-hardening] " Jason A. Donenfeld 2017-06-08 1:03 ` Jason A. Donenfeld 2017-06-08 1:03 ` [kernel-hardening] " Jason A. Donenfeld 2017-06-06 17:47 ` [PATCH v4 05/13] crypto/rng: ensure that the RNG is ready before using Jason A. Donenfeld 2017-06-06 17:47 ` [kernel-hardening] " Jason A. Donenfeld 2017-06-08 0:41 ` Theodore Ts'o 2017-06-08 0:47 ` Jason A. Donenfeld 2017-06-06 17:47 ` [PATCH v4 06/13] iscsi: ensure RNG is seeded before use Jason A. Donenfeld 2017-06-06 17:47 ` [kernel-hardening] " Jason A. Donenfeld 2017-06-08 2:43 ` Theodore Ts'o 2017-06-08 2:43 ` [kernel-hardening] " Theodore Ts'o 2017-06-08 12:09 ` Jason A. Donenfeld 2017-06-16 21:58 ` Lee Duncan 2017-06-17 0:41 ` Jason A. Donenfeld 2017-06-17 3:45 ` Lee Duncan 2017-06-17 14:23 ` Jeffrey Walton [not found] ` <CAH8yC8nHX2r9cfQ0gNeJAUrgSfAS8V16dVHv35BRnLn-YprZCg-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org> 2017-06-17 18:50 ` [kernel-hardening] " Paul Koning 2017-06-17 18:50 ` Paul Koning 2017-07-05 7:08 ` Antw: Re: [kernel-hardening] " Ulrich Windl 2017-07-05 7:08 ` Ulrich Windl 2017-07-05 7:08 ` Ulrich Windl 2017-07-05 13:16 ` Paul Koning 2017-07-05 13:16 ` Paul Koning 2017-07-05 17:34 ` Antw: " Theodore Ts'o 2017-07-05 17:34 ` Antw: Re: [kernel-hardening] " Theodore Ts'o 2017-07-05 17:34 ` Theodore Ts'o 2017-06-18 8:04 ` Stephan Müller [not found] ` <2639082.PtrrGWOPPL-jJGQKZiSfeo1haGO/jJMPxvVK+yQ3ZXh@public.gmane.org> 2017-06-26 1:23 ` Nicholas A. Bellinger 2017-06-26 1:23 ` Nicholas A. Bellinger [not found] ` <1498440189.26123.85.camel-XoQW25Eq2zviZyQQd+hFbcojREIfoBdhmpATvIKMPHk@public.gmane.org> 2017-06-26 17:38 ` Stephan Müller 2017-06-26 17:38 ` Stephan Müller 2017-06-30 6:02 ` Nicholas A. Bellinger [not found] ` <1678474.GnYBdSlWgs-b2PLbiJbNv8ftSvlWXw0+g@public.gmane.org> 2017-07-05 7:03 ` Antw: " Ulrich Windl 2017-07-05 7:03 ` Ulrich Windl 2017-07-05 7:03 ` Ulrich Windl 2017-07-05 12:35 ` Theodore Ts'o 2017-07-05 12:35 ` Theodore Ts'o 2017-06-06 17:47 ` Jason A. Donenfeld [this message] 2017-06-06 17:47 ` [kernel-hardening] [PATCH v4 07/13] ceph: ensure RNG is seeded before using Jason A. Donenfeld 2017-06-08 2:45 ` Theodore Ts'o 2017-06-06 17:47 ` [PATCH v4 08/13] cifs: use get_random_u32 for 32-bit lock random Jason A. Donenfeld 2017-06-06 17:47 ` [kernel-hardening] " Jason A. Donenfeld 2017-06-08 0:25 ` Theodore Ts'o 2017-06-08 0:25 ` [kernel-hardening] " Theodore Ts'o 2017-06-08 0:31 ` Jason A. Donenfeld 2017-06-08 0:34 ` Jason A. Donenfeld 2017-06-06 17:48 ` [PATCH v4 09/13] rhashtable: use get_random_u32 for hash_rnd Jason A. Donenfeld 2017-06-06 17:48 ` [kernel-hardening] " Jason A. Donenfeld 2017-06-08 2:47 ` Theodore Ts'o 2017-06-08 2:47 ` [kernel-hardening] " Theodore Ts'o 2017-06-06 17:48 ` [PATCH v4 10/13] net/neighbor: use get_random_u32 for 32-bit hash random Jason A. Donenfeld 2017-06-06 17:48 ` [kernel-hardening] " Jason A. Donenfeld 2017-06-08 3:00 ` Theodore Ts'o 2017-06-08 3:00 ` [kernel-hardening] " Theodore Ts'o 2017-06-06 17:48 ` [PATCH v4 11/13] net/route: use get_random_int for random counter Jason A. Donenfeld 2017-06-06 17:48 ` [kernel-hardening] " Jason A. Donenfeld 2017-06-08 3:01 ` Theodore Ts'o 2017-06-08 3:01 ` [kernel-hardening] " Theodore Ts'o 2017-06-06 17:48 ` [PATCH v4 12/13] bluetooth/smp: ensure RNG is properly seeded before ECDH use Jason A. Donenfeld 2017-06-06 17:48 ` [kernel-hardening] " Jason A. Donenfeld 2017-06-08 3:06 ` Theodore Ts'o 2017-06-08 3:06 ` [kernel-hardening] " Theodore Ts'o 2017-06-08 5:04 ` Marcel Holtmann 2017-06-08 5:04 ` [kernel-hardening] " Marcel Holtmann 2017-06-08 12:03 ` Jason A. Donenfeld 2017-06-08 12:03 ` [kernel-hardening] " Jason A. Donenfeld 2017-06-08 12:05 ` Jason A. Donenfeld 2017-06-08 12:05 ` [kernel-hardening] " Jason A. Donenfeld 2017-06-08 17:05 ` Marcel Holtmann 2017-06-08 17:05 ` [kernel-hardening] " Marcel Holtmann 2017-06-08 17:34 ` Jason A. Donenfeld 2017-06-08 17:34 ` [kernel-hardening] " Jason A. Donenfeld 2017-06-09 1:16 ` [PATCH] bluetooth: ensure RNG is properly seeded before powerup Jason A. Donenfeld 2017-06-06 17:48 ` [PATCH v4 13/13] random: warn when kernel uses unseeded randomness Jason A. Donenfeld 2017-06-06 17:48 ` [kernel-hardening] " Jason A. Donenfeld 2017-06-08 8:19 ` Theodore Ts'o 2017-06-08 8:19 ` [kernel-hardening] " Theodore Ts'o 2017-06-08 12:01 ` Jason A. Donenfeld 2017-06-08 12:01 ` [kernel-hardening] " Jason A. Donenfeld 2017-06-15 11:03 ` Michael Ellerman 2017-06-15 11:59 ` Stephan Müller 2017-06-18 15:46 ` Theodore Ts'o 2017-06-18 17:55 ` Stephan Müller 2017-06-18 19:12 ` Jason A. Donenfeld 2017-06-18 19:11 ` Jason A. Donenfeld 2017-06-08 8:43 ` Jeffrey Walton 2017-06-08 8:43 ` [kernel-hardening] " Jeffrey Walton 2017-06-07 12:33 ` [PATCH v4 00/13] Unseeded In-Kernel Randomness Fixes Jason A. Donenfeld 2017-06-07 12:33 ` [kernel-hardening] " Jason A. Donenfeld
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