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Groups > linux.kernel > #1369843
| From | Kamal Mostafa <kamal@canonical.com> |
|---|---|
| Newsgroups | linux.kernel |
| Subject | [PATCH 3.19.y-ckt 003/170] crypto: algif_hash - Require setkey before accept(2) |
| Date | 2016-04-02 03:50 +0200 |
| Message-ID | <rjiRj-4Fn-5@gated-at.bofh.it> (permalink) |
| References | <rji4V-3Y5-3@gated-at.bofh.it> |
| Organization | linux.* mail to news gateway |
3.19.8-ckt18 -stable review patch. If anyone has any objections, please let me know.
---8<------------------------------------------------------------
From: Herbert Xu <herbert@gondor.apana.org.au>
commit 6de62f15b581f920ade22d758f4c338311c2f0d4 upstream.
Hash implementations that require a key may crash if you use
them without setting a key. This patch adds the necessary checks
so that if you do attempt to use them without a key that we return
-ENOKEY instead of proceeding.
This patch also adds a compatibility path to support old applications
that do acept(2) before setkey.
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
[bwh: Backported to 3.2:
- Add struct kiocb * parameter to {recv,send}msg ops
- Adjust context]
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
Signed-off-by: Luis Henriques <luis.henriques@canonical.com>
Signed-off-by: Kamal Mostafa <kamal@canonical.com>
---
crypto/algif_hash.c | 201 +++++++++++++++++++++++++++++++++++++++++++++++++---
1 file changed, 193 insertions(+), 8 deletions(-)
diff --git a/crypto/algif_hash.c b/crypto/algif_hash.c
index 43a595e..fa4096d 100644
--- a/crypto/algif_hash.c
+++ b/crypto/algif_hash.c
@@ -34,6 +34,11 @@ struct hash_ctx {
struct ahash_request req;
};
+struct algif_hash_tfm {
+ struct crypto_ahash *hash;
+ bool has_key;
+};
+
static int hash_sendmsg(struct kiocb *unused, struct socket *sock,
struct msghdr *msg, size_t ignored)
{
@@ -248,22 +253,151 @@ static struct proto_ops algif_hash_ops = {
.accept = hash_accept,
};
+static int hash_check_key(struct socket *sock)
+{
+ int err;
+ struct sock *psk;
+ struct alg_sock *pask;
+ struct algif_hash_tfm *tfm;
+ struct sock *sk = sock->sk;
+ struct alg_sock *ask = alg_sk(sk);
+
+ if (ask->refcnt)
+ return 0;
+
+ psk = ask->parent;
+ pask = alg_sk(ask->parent);
+ tfm = pask->private;
+
+ err = -ENOKEY;
+ lock_sock(psk);
+ if (!tfm->has_key)
+ goto unlock;
+
+ if (!pask->refcnt++)
+ sock_hold(psk);
+
+ ask->refcnt = 1;
+ sock_put(psk);
+
+ err = 0;
+
+unlock:
+ release_sock(psk);
+
+ return err;
+}
+
+static int hash_sendmsg_nokey(struct kiocb *unused, struct socket *sock,
+ struct msghdr *msg, size_t size)
+{
+ int err;
+
+ err = hash_check_key(sock);
+ if (err)
+ return err;
+
+ return hash_sendmsg(unused, sock, msg, size);
+}
+
+static ssize_t hash_sendpage_nokey(struct socket *sock, struct page *page,
+ int offset, size_t size, int flags)
+{
+ int err;
+
+ err = hash_check_key(sock);
+ if (err)
+ return err;
+
+ return hash_sendpage(sock, page, offset, size, flags);
+}
+
+static int hash_recvmsg_nokey(struct kiocb *unused, struct socket *sock,
+ struct msghdr *msg, size_t ignored, int flags)
+{
+ int err;
+
+ err = hash_check_key(sock);
+ if (err)
+ return err;
+
+ return hash_recvmsg(unused, sock, msg, ignored, flags);
+}
+
+static int hash_accept_nokey(struct socket *sock, struct socket *newsock,
+ int flags)
+{
+ int err;
+
+ err = hash_check_key(sock);
+ if (err)
+ return err;
+
+ return hash_accept(sock, newsock, flags);
+}
+
+static struct proto_ops algif_hash_ops_nokey = {
+ .family = PF_ALG,
+
+ .connect = sock_no_connect,
+ .socketpair = sock_no_socketpair,
+ .getname = sock_no_getname,
+ .ioctl = sock_no_ioctl,
+ .listen = sock_no_listen,
+ .shutdown = sock_no_shutdown,
+ .getsockopt = sock_no_getsockopt,
+ .mmap = sock_no_mmap,
+ .bind = sock_no_bind,
+ .setsockopt = sock_no_setsockopt,
+ .poll = sock_no_poll,
+
+ .release = af_alg_release,
+ .sendmsg = hash_sendmsg_nokey,
+ .sendpage = hash_sendpage_nokey,
+ .recvmsg = hash_recvmsg_nokey,
+ .accept = hash_accept_nokey,
+};
+
static void *hash_bind(const char *name, u32 type, u32 mask)
{
- return crypto_alloc_ahash(name, type, mask);
+ struct algif_hash_tfm *tfm;
+ struct crypto_ahash *hash;
+
+ tfm = kzalloc(sizeof(*tfm), GFP_KERNEL);
+ if (!tfm)
+ return ERR_PTR(-ENOMEM);
+
+ hash = crypto_alloc_ahash(name, type, mask);
+ if (IS_ERR(hash)) {
+ kfree(tfm);
+ return ERR_CAST(hash);
+ }
+
+ tfm->hash = hash;
+
+ return tfm;
}
static void hash_release(void *private)
{
- crypto_free_ahash(private);
+ struct algif_hash_tfm *tfm = private;
+
+ crypto_free_ahash(tfm->hash);
+ kfree(tfm);
}
static int hash_setkey(void *private, const u8 *key, unsigned int keylen)
{
- return crypto_ahash_setkey(private, key, keylen);
+ struct algif_hash_tfm *tfm = private;
+ int err;
+
+ err = crypto_ahash_setkey(tfm->hash, key, keylen);
+ tfm->has_key = !err;
+
+ return err;
}
-static void hash_sock_destruct(struct sock *sk)
+static void hash_sock_destruct_common(struct sock *sk)
{
struct alg_sock *ask = alg_sk(sk);
struct hash_ctx *ctx = ask->private;
@@ -271,15 +405,40 @@ static void hash_sock_destruct(struct sock *sk)
sock_kzfree_s(sk, ctx->result,
crypto_ahash_digestsize(crypto_ahash_reqtfm(&ctx->req)));
sock_kfree_s(sk, ctx, ctx->len);
+}
+
+static void hash_sock_destruct(struct sock *sk)
+{
+ hash_sock_destruct_common(sk);
af_alg_release_parent(sk);
}
-static int hash_accept_parent(void *private, struct sock *sk)
+static void hash_release_parent_nokey(struct sock *sk)
+{
+ struct alg_sock *ask = alg_sk(sk);
+
+ if (!ask->refcnt) {
+ sock_put(ask->parent);
+ return;
+ }
+
+ af_alg_release_parent(sk);
+}
+
+static void hash_sock_destruct_nokey(struct sock *sk)
+{
+ hash_sock_destruct_common(sk);
+ hash_release_parent_nokey(sk);
+}
+
+static int hash_accept_parent_common(void *private, struct sock *sk)
{
struct hash_ctx *ctx;
struct alg_sock *ask = alg_sk(sk);
- unsigned len = sizeof(*ctx) + crypto_ahash_reqsize(private);
- unsigned ds = crypto_ahash_digestsize(private);
+ struct algif_hash_tfm *tfm = private;
+ struct crypto_ahash *hash = tfm->hash;
+ unsigned len = sizeof(*ctx) + crypto_ahash_reqsize(hash);
+ unsigned ds = crypto_ahash_digestsize(hash);
ctx = sock_kmalloc(sk, len, GFP_KERNEL);
if (!ctx)
@@ -299,7 +458,7 @@ static int hash_accept_parent(void *private, struct sock *sk)
ask->private = ctx;
- ahash_request_set_tfm(&ctx->req, private);
+ ahash_request_set_tfm(&ctx->req, hash);
ahash_request_set_callback(&ctx->req, CRYPTO_TFM_REQ_MAY_BACKLOG,
af_alg_complete, &ctx->completion);
@@ -308,12 +467,38 @@ static int hash_accept_parent(void *private, struct sock *sk)
return 0;
}
+static int hash_accept_parent(void *private, struct sock *sk)
+{
+ struct algif_hash_tfm *tfm = private;
+
+ if (!tfm->has_key && crypto_ahash_has_setkey(tfm->hash))
+ return -ENOKEY;
+
+ return hash_accept_parent_common(private, sk);
+}
+
+static int hash_accept_parent_nokey(void *private, struct sock *sk)
+{
+ int err;
+
+ err = hash_accept_parent_common(private, sk);
+ if (err)
+ goto out;
+
+ sk->sk_destruct = hash_sock_destruct_nokey;
+
+out:
+ return err;
+}
+
static const struct af_alg_type algif_type_hash = {
.bind = hash_bind,
.release = hash_release,
.setkey = hash_setkey,
.accept = hash_accept_parent,
+ .accept_nokey = hash_accept_parent_nokey,
.ops = &algif_hash_ops,
+ .ops_nokey = &algif_hash_ops_nokey,
.name = "hash",
.owner = THIS_MODULE
};
--
2.7.4
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[PATCH 3.19.y-ckt 075/170] be2iscsi: set the boot_kset pointer to NULL in case of failure Kamal Mostafa <kamal@canonical.com> - 2016-04-02 03:30 +0200
[PATCH 3.19.y-ckt 064/170] KVM: i8254: change PIT discard tick policy Kamal Mostafa <kamal@canonical.com> - 2016-04-02 03:30 +0200
[PATCH 3.19.y-ckt 074/170] x86/PCI: Mark Broadwell-EP Home Agent & PCU as having non-compliant BARs Kamal Mostafa <kamal@canonical.com> - 2016-04-02 03:30 +0200
[PATCH 3.19.y-ckt 076/170] drm/radeon: Don't drop DP 2.7 Ghz link setup on some cards. Kamal Mostafa <kamal@canonical.com> - 2016-04-02 03:30 +0200
[PATCH 3.19.y-ckt 066/170] rt2x00: add new rt2800usb device Buffalo WLI-UC-G450 Kamal Mostafa <kamal@canonical.com> - 2016-04-02 03:30 +0200
[PATCH 3.19.y-ckt 080/170] Bluetooth: btusb: Add a new AR3012 ID 13d3:3472 Kamal Mostafa <kamal@canonical.com> - 2016-04-02 03:30 +0200
[PATCH 3.19.y-ckt 062/170] of: alloc anywhere from memblock if range not specified Kamal Mostafa <kamal@canonical.com> - 2016-04-02 03:30 +0200
[PATCH 3.19.y-ckt 092/170] md: multipath: don't hardcopy bio in .make_request path Kamal Mostafa <kamal@canonical.com> - 2016-04-02 03:30 +0200
[PATCH 3.19.y-ckt 063/170] usb: hub: fix a typo in hub_port_init() leading to wrong logic Kamal Mostafa <kamal@canonical.com> - 2016-04-02 03:30 +0200
[PATCH 3.19.y-ckt 058/170] mtip32xx: Print exact time when an internal command is interrupted Kamal Mostafa <kamal@canonical.com> - 2016-04-02 03:30 +0200
[PATCH 3.19.y-ckt 089/170] bus: imx-weim: Take the 'status' property value into account Kamal Mostafa <kamal@canonical.com> - 2016-04-02 03:30 +0200
[PATCH 3.19.y-ckt 052/170] watchdog: rc32434_wdt: fix ioctl error handling Kamal Mostafa <kamal@canonical.com> - 2016-04-02 03:30 +0200
[PATCH 3.19.y-ckt 068/170] perf/core: Fix perf_sched_count derailment Kamal Mostafa <kamal@canonical.com> - 2016-04-02 03:30 +0200
[PATCH 3.19.y-ckt 055/170] quota: Fix possible GPF due to uninitialised pointers Kamal Mostafa <kamal@canonical.com> - 2016-04-02 03:30 +0200
[PATCH 3.19.y-ckt 067/170] pinctrl-bcm2835: Fix cut-and-paste error in "pull" parsing Kamal Mostafa <kamal@canonical.com> - 2016-04-02 03:30 +0200
[PATCH 3.19.y-ckt 065/170] sched/cputime: Fix steal time accounting vs. CPU hotplug Kamal Mostafa <kamal@canonical.com> - 2016-04-02 03:30 +0200
[PATCH 3.19.y-ckt 085/170] iser-target: Separate flows for np listeners and connections cma events Kamal Mostafa <kamal@canonical.com> - 2016-04-02 03:30 +0200
[PATCH 3.19.y-ckt 056/170] mtip32xx: Fix broken service thread handling Kamal Mostafa <kamal@canonical.com> - 2016-04-02 03:30 +0200
[PATCH 3.19.y-ckt 059/170] mtip32xx: Avoid issuing standby immediate cmd during FTL rebuild Kamal Mostafa <kamal@canonical.com> - 2016-04-02 03:30 +0200
[PATCH 3.19.y-ckt 057/170] mtip32xx: Remove unwanted code from taskfile error handler Kamal Mostafa <kamal@canonical.com> - 2016-04-02 03:30 +0200
[PATCH 3.19.y-ckt 060/170] mtip32xx: Handle safe removal during IO Kamal Mostafa <kamal@canonical.com> - 2016-04-02 03:30 +0200
[PATCH 3.19.y-ckt 090/170] ALSA: intel8x0: Add clock quirk entry for AD1981B on IBM ThinkPad X41. Kamal Mostafa <kamal@canonical.com> - 2016-04-02 03:30 +0200
[PATCH 3.19.y-ckt 087/170] xtensa: fix preemption in {clear,copy}_user_highpage Kamal Mostafa <kamal@canonical.com> - 2016-04-02 03:30 +0200
[PATCH 3.19.y-ckt 078/170] jbd2: fix FS corruption possibility in jbd2_journal_destroy() on umount path Kamal Mostafa <kamal@canonical.com> - 2016-04-02 03:30 +0200
[PATCH 3.19.y-ckt 072/170] bcache: cleaned up error handling around register_cache() Kamal Mostafa <kamal@canonical.com> - 2016-04-02 03:30 +0200
[PATCH 3.19.y-ckt 070/170] sched/cputime: Fix steal_account_process_tick() to always return jiffies Kamal Mostafa <kamal@canonical.com> - 2016-04-02 03:30 +0200
[PATCH 3.19.y-ckt 083/170] iser-target: Fix identification of login rx descriptor type Kamal Mostafa <kamal@canonical.com> - 2016-04-02 03:30 +0200
[PATCH 3.19.y-ckt 081/170] ALSA: pcm: Avoid "BUG:" string for warnings again Kamal Mostafa <kamal@canonical.com> - 2016-04-02 03:30 +0200
[PATCH 3.19.y-ckt 050/170] IB/srpt: Simplify srpt_handle_tsk_mgmt() Kamal Mostafa <kamal@canonical.com> - 2016-04-02 03:30 +0200
[PATCH 3.19.y-ckt 077/170] sg: fix dxferp in from_to case Kamal Mostafa <kamal@canonical.com> - 2016-04-02 03:30 +0200
[PATCH 3.19.y-ckt 073/170] bcache: fix cache_set_flush() NULL pointer dereference on OOM Kamal Mostafa <kamal@canonical.com> - 2016-04-02 03:30 +0200
[PATCH 3.19.y-ckt 088/170] xtensa: clear all DBREAKC registers on start Kamal Mostafa <kamal@canonical.com> - 2016-04-02 03:30 +0200
[PATCH 3.19.y-ckt 025/170] [media] pwc: Add USB id for Philips Spc880nc webcam Kamal Mostafa <kamal@canonical.com> - 2016-04-02 03:40 +0200
[PATCH 3.19.y-ckt 022/170] crypto: ccp - Add hash state import and export support Kamal Mostafa <kamal@canonical.com> - 2016-04-02 03:40 +0200
[PATCH 3.19.y-ckt 029/170] net: irda: Fix use-after-free in irtty_open() Kamal Mostafa <kamal@canonical.com> - 2016-04-02 03:40 +0200
[PATCH 3.19.y-ckt 027/170] crypto: ccp - Don't assume export/import areas are aligned Kamal Mostafa <kamal@canonical.com> - 2016-04-02 03:40 +0200
[PATCH 3.19.y-ckt 026/170] crypto: ccp - Limit the amount of information exported Kamal Mostafa <kamal@canonical.com> - 2016-04-02 03:40 +0200
[PATCH 3.19.y-ckt 028/170] 8250: use callbacks to access UART_DLL/UART_DLM Kamal Mostafa <kamal@canonical.com> - 2016-04-02 03:40 +0200
[PATCH 3.19.y-ckt 019/170] cpu: Provide smpboot_thread_init() on !CONFIG_SMP kernels as well Kamal Mostafa <kamal@canonical.com> - 2016-04-02 03:40 +0200
[PATCH 3.19.y-ckt 018/170] cpu: Defer smpboot kthread unparking until CPU known to scheduler Kamal Mostafa <kamal@canonical.com> - 2016-04-02 03:40 +0200
[PATCH 3.19.y-ckt 046/170] crypto: ccp - memset request context to zero during import Kamal Mostafa <kamal@canonical.com> - 2016-04-02 03:40 +0200
[PATCH 3.19.y-ckt 045/170] md/raid5: Compare apples to apples (or sectors to sectors) Kamal Mostafa <kamal@canonical.com> - 2016-04-02 03:40 +0200
[PATCH 3.19.y-ckt 051/170] [media] bttv: Width must be a multiple of 16 when capturing planar formats Kamal Mostafa <kamal@canonical.com> - 2016-04-02 03:40 +0200
[PATCH 3.19.y-ckt 043/170] mtd: onenand: fix deadlock in onenand_block_markbad Kamal Mostafa <kamal@canonical.com> - 2016-04-02 03:40 +0200
[PATCH 3.19.y-ckt 040/170] Bluetooth: Add new AR3012 ID 0489:e095 Kamal Mostafa <kamal@canonical.com> - 2016-04-02 03:40 +0200
[PATCH 3.19.y-ckt 039/170] Bluetooth: btusb: Add new AR3012 ID 13d3:3395 Kamal Mostafa <kamal@canonical.com> - 2016-04-02 03:40 +0200
[PATCH 3.19.y-ckt 037/170] [media] saa7134: Fix bytesperline not being set correctly for planar formats Kamal Mostafa <kamal@canonical.com> - 2016-04-02 03:40 +0200
[PATCH 3.19.y-ckt 023/170] tty: Fix GPF in flush_to_ldisc(), part 2 Kamal Mostafa <kamal@canonical.com> - 2016-04-02 03:40 +0200
[PATCH 3.19.y-ckt 044/170] PCI: Disable IO/MEM decoding for devices with non-compliant BARs Kamal Mostafa <kamal@canonical.com> - 2016-04-02 03:40 +0200
[PATCH 3.19.y-ckt 049/170] mmc: sdhci: fix data timeout (part 2) Kamal Mostafa <kamal@canonical.com> - 2016-04-02 03:40 +0200
[PATCH 3.19.y-ckt 047/170] Bluetooth: btusb: Add a new AR3012 ID 04ca:3014 Kamal Mostafa <kamal@canonical.com> - 2016-04-02 03:40 +0200
[PATCH 3.19.y-ckt 033/170] usb: retry reset if a device times out Kamal Mostafa <kamal@canonical.com> - 2016-04-02 03:40 +0200
[PATCH 3.19.y-ckt 038/170] perf tools: Dont stop PMU parsing on alias parse error Kamal Mostafa <kamal@canonical.com> - 2016-04-02 03:40 +0200
[PATCH 3.19.y-ckt 035/170] scripts/coccinelle: modernize & Kamal Mostafa <kamal@canonical.com> - 2016-04-02 03:40 +0200
[PATCH 3.19.y-ckt 034/170] HID: fix hid_ignore_special_drivers module parameter Kamal Mostafa <kamal@canonical.com> - 2016-04-02 03:40 +0200
[PATCH 3.19.y-ckt 031/170] tools/hv: Use include/uapi with __EXPORTED_HEADERS__ Kamal Mostafa <kamal@canonical.com> - 2016-04-02 03:40 +0200
[PATCH 3.19.y-ckt 041/170] aacraid: Fix memory leak in aac_fib_map_free Kamal Mostafa <kamal@canonical.com> - 2016-04-02 03:40 +0200
[PATCH 3.19.y-ckt 030/170] staging: comedi: ni_tiocmd: change mistaken use of start_src for start_arg Kamal Mostafa <kamal@canonical.com> - 2016-04-02 03:40 +0200
[PATCH 3.19.y-ckt 053/170] nfsd4: fix bad bounds checking Kamal Mostafa <kamal@canonical.com> - 2016-04-02 03:40 +0200
[PATCH 3.19.y-ckt 032/170] ARM: dts: armada-375: use armada-370-sata for SATA Kamal Mostafa <kamal@canonical.com> - 2016-04-02 03:40 +0200
[PATCH 3.19.y-ckt 042/170] aic7xxx: Fix queue depth handling Kamal Mostafa <kamal@canonical.com> - 2016-04-02 03:40 +0200
[PATCH 3.19.y-ckt 024/170] [media] media: v4l2-compat-ioctl32: fix missing length copy in put_v4l2_buffer32 Kamal Mostafa <kamal@canonical.com> - 2016-04-02 03:40 +0200
[PATCH 3.19.y-ckt 021/170] EDAC, amd64_edac: Shift wrapping issue in f1x_get_norm_dct_addr() Kamal Mostafa <kamal@canonical.com> - 2016-04-02 03:40 +0200
[PATCH 3.19.y-ckt 003/170] crypto: algif_hash - Require setkey before accept(2) Kamal Mostafa <kamal@canonical.com> - 2016-04-02 03:50 +0200
[PATCH 3.19.y-ckt 013/170] ALSA: usb-audio: Fix NULL dereference in create_fixed_stream_quirk() Kamal Mostafa <kamal@canonical.com> - 2016-04-02 03:50 +0200
[PATCH 3.19.y-ckt 008/170] crypto: algif_hash - Fix race condition in hash_check_key Kamal Mostafa <kamal@canonical.com> - 2016-04-02 03:50 +0200
[PATCH 3.19.y-ckt 005/170] crypto: algif_skcipher - Add key check exception for cipher_null Kamal Mostafa <kamal@canonical.com> - 2016-04-02 03:50 +0200
[PATCH 3.19.y-ckt 015/170] include/linux/poison.h: fix LIST_POISON{1,2} offset Kamal Mostafa <kamal@canonical.com> - 2016-04-02 03:50 +0200
[PATCH 3.19.y-ckt 017/170] USB: cdc-acm: more sanity checking Kamal Mostafa <kamal@canonical.com> - 2016-04-02 03:50 +0200
[PATCH 3.19.y-ckt 012/170] USB: iowarrior: fix oops with malicious USB descriptors Kamal Mostafa <kamal@canonical.com> - 2016-04-02 03:50 +0200
[PATCH 3.19.y-ckt 006/170] crypto: algif_hash - Remove custom release parent function Kamal Mostafa <kamal@canonical.com> - 2016-04-02 03:50 +0200
[PATCH 3.19.y-ckt 002/170] crypto: algif_skcipher - Add nokey compatibility path Kamal Mostafa <kamal@canonical.com> - 2016-04-02 03:50 +0200
[PATCH 3.19.y-ckt 014/170] ALSA: usb-audio: Add sanity checks for endpoint accesses Kamal Mostafa <kamal@canonical.com> - 2016-04-02 03:50 +0200
[PATCH 3.19.y-ckt 004/170] crypto: skcipher - Add crypto_skcipher_has_setkey Kamal Mostafa <kamal@canonical.com> - 2016-04-02 03:50 +0200
[PATCH 3.19.y-ckt 007/170] crypto: algif_skcipher - Remove custom release parent function Kamal Mostafa <kamal@canonical.com> - 2016-04-02 03:50 +0200
[PATCH 3.19.y-ckt 009/170] crypto: algif_skcipher - Fix race condition in skcipher_check_key Kamal Mostafa <kamal@canonical.com> - 2016-04-02 03:50 +0200
csiph-web