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* crypto: pcrypt - Delay write to padata->infoDaniel Jordan2021-10-291-4/+8
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | These three events can race when pcrypt is used multiple times in a template ("pcrypt(pcrypt(...))"): 1. [taskA] The caller makes the crypto request via crypto_aead_encrypt() 2. [kworkerB] padata serializes the inner pcrypt request 3. [kworkerC] padata serializes the outer pcrypt request 3 might finish before the call to crypto_aead_encrypt() returns in 1, resulting in two possible issues. First, a use-after-free of the crypto request's memory when, for example, taskA writes to the outer pcrypt request's padata->info in pcrypt_aead_enc() after kworkerC completes the request. Second, the outer pcrypt request overwrites the inner pcrypt request's return code with -EINPROGRESS, making a successful request appear to fail. For instance, kworkerB writes the outer pcrypt request's padata->info in pcrypt_aead_done() and then taskA overwrites it in pcrypt_aead_enc(). Avoid both situations by delaying the write of padata->info until after the inner crypto request's return code is checked. This prevents the use-after-free by not touching the crypto request's memory after the next-inner crypto request is made, and stops padata->info from being overwritten. Fixes: 5068c7a883d16 ("crypto: pcrypt - Add pcrypt crypto parallelization wrapper") Reported-by: syzbot+b187b77c8474f9648fae@syzkaller.appspotmail.com Signed-off-by: Daniel Jordan <daniel.m.jordan@oracle.com> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
* padata: fold padata_alloc_possible() into padata_alloc()Daniel Jordan2020-07-231-1/+1
| | | | | | | | | | | | There's no reason to have two interfaces when there's only one caller. Removing _possible saves text and simplifies future changes. Signed-off-by: Daniel Jordan <daniel.m.jordan@oracle.com> Cc: Herbert Xu <herbert@gondor.apana.org.au> Cc: Steffen Klassert <steffen.klassert@secunet.com> Cc: linux-crypto@vger.kernel.org Cc: linux-kernel@vger.kernel.org Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
* padata: remove stop functionDaniel Jordan2020-07-231-9/+3
| | | | | | | | | | | | | | | | | | | padata_stop() has two callers and is unnecessary in both cases. When pcrypt calls it before padata_free(), it's being unloaded so there are no outstanding padata jobs[0]. When __padata_free() calls it, it's either along the same path or else pcrypt initialization failed, which of course means there are also no outstanding jobs. Removing it simplifies padata and saves text. [0] https://lore.kernel.org/linux-crypto/20191119225017.mjrak2fwa5vccazl@gondor.apana.org.au/ Signed-off-by: Daniel Jordan <daniel.m.jordan@oracle.com> Cc: Herbert Xu <herbert@gondor.apana.org.au> Cc: Steffen Klassert <steffen.klassert@secunet.com> Cc: linux-crypto@vger.kernel.org Cc: linux-kernel@vger.kernel.org Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
* padata: remove start functionDaniel Jordan2020-07-231-3/+0
| | | | | | | | | | | | | | | padata_start() is only used right after pcrypt allocates an instance with all possible CPUs, when PADATA_INVALID can't happen, so there's no need for a separate "start" step. It can be done during allocation to save text, make using padata easier, and avoid unneeded calls in the future. Signed-off-by: Daniel Jordan <daniel.m.jordan@oracle.com> Cc: Herbert Xu <herbert@gondor.apana.org.au> Cc: Steffen Klassert <steffen.klassert@secunet.com> Cc: linux-crypto@vger.kernel.org Cc: linux-kernel@vger.kernel.org Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
* crypto: algapi - use common mechanism for inheriting flagsEric Biggers2020-07-161-9/+5
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The flag CRYPTO_ALG_ASYNC is "inherited" in the sense that when a template is instantiated, the template will have CRYPTO_ALG_ASYNC set if any of the algorithms it uses has CRYPTO_ALG_ASYNC set. We'd like to add a second flag (CRYPTO_ALG_ALLOCATES_MEMORY) that gets "inherited" in the same way. This is difficult because the handling of CRYPTO_ALG_ASYNC is hardcoded everywhere. Address this by: - Add CRYPTO_ALG_INHERITED_FLAGS, which contains the set of flags that have these inheritance semantics. - Add crypto_algt_inherited_mask(), for use by template ->create() methods. It returns any of these flags that the user asked to be unset and thus must be passed in the 'mask' to crypto_grab_*(). - Also modify crypto_check_attr_type() to handle computing the 'mask' so that most templates can just use this. - Make crypto_grab_*() propagate these flags to the template instance being created so that templates don't have to do this themselves. Make crypto/simd.c propagate these flags too, since it "wraps" another algorithm, similar to a template. Based on a patch by Mikulas Patocka <mpatocka@redhat.com> (https://lore.kernel.org/r/alpine.LRH.2.02.2006301414580.30526@file01.intranet.prod.int.rdu2.redhat.com). Signed-off-by: Eric Biggers <ebiggers@google.com> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
* crypto: pcrypt - simplify error handling in pcrypt_create_aead()Eric Biggers2020-03-061-24/+9
| | | | | | | | | | | | Simplify the error handling in pcrypt_create_aead() by taking advantage of crypto_grab_aead() now handling an ERR_PTR() name and by taking advantage of crypto_drop_aead() now accepting (as a no-op) a spawn that hasn't been grabbed yet. This required also making padata_free_shell() accept a NULL argument. Signed-off-by: Eric Biggers <ebiggers@google.com> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
* crypto: aead - pass instance to crypto_grab_aead()Eric Biggers2020-01-091-3/+2
| | | | | | | | | | | | | | | | | | | | Initializing a crypto_aead_spawn currently requires: 1. Set spawn->base.inst to point to the instance. 2. Call crypto_grab_aead(). But there's no reason for these steps to be separate, and in fact this unneeded complication has caused at least one bug, the one fixed by commit 6db43410179b ("crypto: adiantum - initialize crypto_spawn::inst") So just make crypto_grab_aead() take the instance as an argument. To keep the function calls from getting too unwieldy due to this extra argument, also introduce a 'mask' variable into the affected places which weren't already using one. Signed-off-by: Eric Biggers <ebiggers@google.com> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
* padata: remove cpumask change notifierDaniel Jordan2019-12-111-1/+0
| | | | | | | | | | | | | | | Since commit 63d3578892dc ("crypto: pcrypt - remove padata cpumask notifier") this feature is unused, so get rid of it. Signed-off-by: Daniel Jordan <daniel.m.jordan@oracle.com> Cc: Eric Biggers <ebiggers@kernel.org> Cc: Herbert Xu <herbert@gondor.apana.org.au> Cc: Jonathan Corbet <corbet@lwn.net> Cc: Steffen Klassert <steffen.klassert@secunet.com> Cc: linux-crypto@vger.kernel.org Cc: linux-doc@vger.kernel.org Cc: linux-kernel@vger.kernel.org Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
* crypto: pcrypt - Do not clear MAY_SLEEP flag in original requestHerbert Xu2019-12-111-1/+0
| | | | | | | | | | | We should not be modifying the original request's MAY_SLEEP flag upon completion. It makes no sense to do so anyway. Reported-by: Eric Biggers <ebiggers@kernel.org> Fixes: 5068c7a883d1 ("crypto: pcrypt - Add pcrypt crypto...") Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au> Tested-by: Eric Biggers <ebiggers@kernel.org> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
* crypto: pcrypt - Avoid deadlock by using per-instance padata queuesHerbert Xu2019-12-111-3/+33
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | If the pcrypt template is used multiple times in an algorithm, then a deadlock occurs because all pcrypt instances share the same padata_instance, which completes requests in the order submitted. That is, the inner pcrypt request waits for the outer pcrypt request while the outer request is already waiting for the inner. This patch fixes this by allocating a set of queues for each pcrypt instance instead of using two global queues. In order to maintain the existing user-space interface, the pinst structure remains global so any sysfs modifications will apply to every pcrypt instance. Note that when an update occurs we have to allocate memory for every pcrypt instance. Should one of the allocations fail we will abort the update without rolling back changes already made. The new per-instance data structure is called padata_shell and is essentially a wrapper around parallel_data. Reproducer: #include <linux/if_alg.h> #include <sys/socket.h> #include <unistd.h> int main() { struct sockaddr_alg addr = { .salg_type = "aead", .salg_name = "pcrypt(pcrypt(rfc4106-gcm-aesni))" }; int algfd, reqfd; char buf[32] = { 0 }; algfd = socket(AF_ALG, SOCK_SEQPACKET, 0); bind(algfd, (void *)&addr, sizeof(addr)); setsockopt(algfd, SOL_ALG, ALG_SET_KEY, buf, 20); reqfd = accept(algfd, 0, 0); write(reqfd, buf, 32); read(reqfd, buf, 16); } Reported-by: syzbot+56c7151cad94eec37c521f0e47d2eee53f9361c4@syzkaller.appspotmail.com Fixes: 5068c7a883d1 ("crypto: pcrypt - Add pcrypt crypto parallelization wrapper") Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au> Tested-by: Eric Biggers <ebiggers@kernel.org> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
* crypto: pcrypt - Fix user-after-free on module unloadHerbert Xu2019-12-111-1/+2
| | | | | | | | | | | On module unload of pcrypt we must unregister the crypto algorithms first and then tear down the padata structure. As otherwise the crypto algorithms are still alive and can be used while the padata structure is being freed. Fixes: 5068c7a883d1 ("crypto: pcrypt - Add pcrypt crypto...") Cc: <stable@vger.kernel.org> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
* padata, pcrypt: take CPU hotplug lock internally in padata_alloc_possibleDaniel Jordan2019-09-131-4/+0
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | With pcrypt's cpumask no longer used, take the CPU hotplug lock inside padata_alloc_possible. Useful later in the series for avoiding nested acquisition of the CPU hotplug lock in padata when padata_alloc_possible is allocating an unbound workqueue. Without this patch, this nested acquisition would happen later in the series: pcrypt_init_padata get_online_cpus alloc_padata_possible alloc_padata alloc_workqueue(WQ_UNBOUND) // later in the series alloc_and_link_pwqs apply_wqattrs_lock get_online_cpus // recursive rwsem acquisition Signed-off-by: Daniel Jordan <daniel.m.jordan@oracle.com> Acked-by: Steffen Klassert <steffen.klassert@secunet.com> Cc: Herbert Xu <herbert@gondor.apana.org.au> Cc: Lai Jiangshan <jiangshanlai@gmail.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Tejun Heo <tj@kernel.org> Cc: linux-crypto@vger.kernel.org Cc: linux-kernel@vger.kernel.org Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
* crypto: pcrypt - remove padata cpumask notifierDaniel Jordan2019-09-131-107/+18
| | | | | | | | | | | | | | | | Now that padata_do_parallel takes care of finding an alternate callback CPU, there's no need for pcrypt's callback cpumask, so remove it and the notifier callback that keeps it in sync. Signed-off-by: Daniel Jordan <daniel.m.jordan@oracle.com> Acked-by: Steffen Klassert <steffen.klassert@secunet.com> Cc: Herbert Xu <herbert@gondor.apana.org.au> Cc: Lai Jiangshan <jiangshanlai@gmail.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Tejun Heo <tj@kernel.org> Cc: linux-crypto@vger.kernel.org Cc: linux-kernel@vger.kernel.org Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
* padata: make padata_do_parallel find alternate callback CPUDaniel Jordan2019-09-131-31/+2
| | | | | | | | | | | | | | | | | | | | | | | | | | | padata_do_parallel currently returns -EINVAL if the callback CPU isn't in the callback cpumask. pcrypt tries to prevent this situation by keeping its own callback cpumask in sync with padata's and checks that the callback CPU it passes to padata is valid. Make padata handle this instead. padata_do_parallel now takes a pointer to the callback CPU and updates it for the caller if an alternate CPU is used. Overall behavior in terms of which callback CPUs are chosen stays the same. Prepares for removal of the padata cpumask notifier in pcrypt, which will fix a lockdep complaint about nested acquisition of the CPU hotplug lock later in the series. Signed-off-by: Daniel Jordan <daniel.m.jordan@oracle.com> Acked-by: Steffen Klassert <steffen.klassert@secunet.com> Cc: Herbert Xu <herbert@gondor.apana.org.au> Cc: Lai Jiangshan <jiangshanlai@gmail.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Tejun Heo <tj@kernel.org> Cc: linux-crypto@vger.kernel.org Cc: linux-kernel@vger.kernel.org Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
* padata: allocate workqueue internallyDaniel Jordan2019-09-131-11/+2
| | | | | | | | | | | | | | | | | | | | Move workqueue allocation inside of padata to prepare for further changes to how padata uses workqueues. Guarantees the workqueue is created with max_active=1, which padata relies on to work correctly. No functional change. Signed-off-by: Daniel Jordan <daniel.m.jordan@oracle.com> Acked-by: Steffen Klassert <steffen.klassert@secunet.com> Cc: Herbert Xu <herbert@gondor.apana.org.au> Cc: Jonathan Corbet <corbet@lwn.net> Cc: Lai Jiangshan <jiangshanlai@gmail.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Tejun Heo <tj@kernel.org> Cc: linux-crypto@vger.kernel.org Cc: linux-doc@vger.kernel.org Cc: linux-kernel@vger.kernel.org Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
* treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 335Thomas Gleixner2019-06-051-13/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | Based on 1 normalized pattern(s): this program is free software you can redistribute it and or modify it under the terms and conditions of the gnu general public license version 2 as published by the free software foundation this program is distributed in the hope it will be useful but without any warranty without even the implied warranty of merchantability or fitness for a particular purpose see the gnu general public license for more details you should have received a copy of the gnu general public license along with this program if not write to the free software foundation inc 51 franklin st fifth floor boston ma 02110 1301 usa extracted by the scancode license scanner the SPDX license identifier GPL-2.0-only has been chosen to replace the boilerplate/reference in 111 file(s). Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Reviewed-by: Alexios Zavras <alexios.zavras@intel.com> Reviewed-by: Allison Randal <allison@lohutok.net> Cc: linux-spdx@vger.kernel.org Link: https://lkml.kernel.org/r/20190530000436.567572064@linutronix.de Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
* crypto: run initcalls for generic implementations earlierEric Biggers2019-04-181-1/+1
| | | | | | | | | | | | | | | | | | | | Use subsys_initcall for registration of all templates and generic algorithm implementations, rather than module_init. Then change cryptomgr to use arch_initcall, to place it before the subsys_initcalls. This is needed so that when both a generic and optimized implementation of an algorithm are built into the kernel (not loadable modules), the generic implementation is registered before the optimized one. Otherwise, the self-tests for the optimized implementation are unable to allocate the generic implementation for the new comparison fuzz tests. Note that on arm, a side effect of this change is that self-tests for generic implementations may run before the unaligned access handler has been installed. So, unaligned accesses will crash the kernel. This is arguably a good thing as it makes it easier to detect that type of bug. Signed-off-by: Eric Biggers <ebiggers@google.com> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
* Merge branch 'linus' of ↵Linus Torvalds2018-12-271-1/+1
|\ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/herbert/crypto-2.6 Pull crypto updates from Herbert Xu: "API: - Add 1472-byte test to tcrypt for IPsec - Reintroduced crypto stats interface with numerous changes - Support incremental algorithm dumps Algorithms: - Add xchacha12/20 - Add nhpoly1305 - Add adiantum - Add streebog hash - Mark cts(cbc(aes)) as FIPS allowed Drivers: - Improve performance of arm64/chacha20 - Improve performance of x86/chacha20 - Add NEON-accelerated nhpoly1305 - Add SSE2 accelerated nhpoly1305 - Add AVX2 accelerated nhpoly1305 - Add support for 192/256-bit keys in gcmaes AVX - Add SG support in gcmaes AVX - ESN for inline IPsec tx in chcr - Add support for CryptoCell 703 in ccree - Add support for CryptoCell 713 in ccree - Add SM4 support in ccree - Add SM3 support in ccree - Add support for chacha20 in caam/qi2 - Add support for chacha20 + poly1305 in caam/jr - Add support for chacha20 + poly1305 in caam/qi2 - Add AEAD cipher support in cavium/nitrox" * 'linus' of git://git.kernel.org/pub/scm/linux/kernel/git/herbert/crypto-2.6: (130 commits) crypto: skcipher - remove remnants of internal IV generators crypto: cavium/nitrox - Fix build with !CONFIG_DEBUG_FS crypto: salsa20-generic - don't unnecessarily use atomic walk crypto: skcipher - add might_sleep() to skcipher_walk_virt() crypto: x86/chacha - avoid sleeping under kernel_fpu_begin() crypto: cavium/nitrox - Added AEAD cipher support crypto: mxc-scc - fix build warnings on ARM64 crypto: api - document missing stats member crypto: user - remove unused dump functions crypto: chelsio - Fix wrong error counter increments crypto: chelsio - Reset counters on cxgb4 Detach crypto: chelsio - Handle PCI shutdown event crypto: chelsio - cleanup:send addr as value in function argument crypto: chelsio - Use same value for both channel in single WR crypto: chelsio - Swap location of AAD and IV sent in WR crypto: chelsio - remove set but not used variable 'kctx_len' crypto: ux500 - Use proper enum in hash_set_dma_transfer crypto: ux500 - Use proper enum in cryp_set_dma_transfer crypto: aesni - Add scatter/gather avx stubs, and use them in C crypto: aesni - Introduce partial block macro ..
| * pcrypt: use format specifier in kobject_addColin Ian King2018-11-091-1/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Passing string 'name' as the format specifier is potentially hazardous because name could (although very unlikely to) have a format specifier embedded in it causing issues when parsing the non-existent arguments to these. Follow best practice by using the "%s" format string for the string 'name'. Cleans up clang warning: crypto/pcrypt.c:397:40: warning: format string is not a string literal (potentially insecure) [-Wformat-security] Fixes: a3fb1e330dd2 ("pcrypt: Added sysfs interface to pcrypt") Signed-off-by: Colin Ian King <colin.king@canonical.com> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
* | crypto/pcrypt: Replace synchronize_rcu_bh() with synchronize_rcu()Paul E. McKenney2018-11-271-1/+1
|/ | | | | | | | | | | | Now that synchronize_rcu() waits for bh-disable regions of code as well as RCU read-side critical sections, the synchronize_rcu_bh() in pcrypt_cpumask_change_notify() can be replaced by synchronize_rcu(). This commit therefore makes this change. Signed-off-by: Paul E. McKenney <paulmck@linux.ibm.com> Cc: Steffen Klassert <steffen.klassert@secunet.com> Cc: <linux-crypto@vger.kernel.org> Acked-by: Herbert Xu <herbert@gondor.apana.org.au>
* crypto: pcrypt - fix freeing pcrypt instancesEric Biggers2017-12-221-9/+10
| | | | | | | | | | | | | | | | | | pcrypt is using the old way of freeing instances, where the ->free() method specified in the 'struct crypto_template' is passed a pointer to the 'struct crypto_instance'. But the crypto_instance is being kfree()'d directly, which is incorrect because the memory was actually allocated as an aead_instance, which contains the crypto_instance at a nonzero offset. Thus, the wrong pointer was being kfree()'d. Fix it by switching to the new way to free aead_instance's where the ->free() method is specified in the aead_instance itself. Reported-by: syzbot <syzkaller@googlegroups.com> Fixes: 0496f56065e0 ("crypto: pcrypt - Add support for new AEAD interface") Cc: <stable@vger.kernel.org> # v4.2+ Signed-off-by: Eric Biggers <ebiggers@google.com> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
* crypto: aead - Remove CRYPTO_ALG_AEAD_NEW flagHerbert Xu2015-08-171-4/+1
| | | | | | | This patch removes the CRYPTO_ALG_AEAD_NEW flag now that everyone has been converted. Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
* crypto: pcrypt - Propagate new AEAD implementation flagHerbert Xu2015-07-141-1/+11
| | | | | | | | | This patch allows the CRYPTO_ALG_AEAD_NEW flag to be propagated. It also restores the ASYNC bit that went missing during the AEAD conversion. Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
* crypto: pcrypt - Add support for new AEAD interfaceHerbert Xu2015-06-031-95/+40
| | | | | | This patch converts pcrypt over to the new AEAD interface. Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
* crypto: pcrypt - Make tfm_count an atomic_tHerbert Xu2015-05-251-4/+4
| | | | | | | The variable tfm_count is accessed by multiple threads without locking. This patch converts it to an atomic_t. Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
* crypto: pcrypt - Use crypto_grab_aeadHerbert Xu2015-05-221-36/+35
| | | | | | | | | | | | As AEAD has switched over to using frontend types, the function crypto_init_spawn must not be used since it does not specify a frontend type. Otherwise it leads to a crash when the spawn is used. This patch fixes it by switching over to crypto_grab_aead instead. Fixes: 5d1d65f8bea6 ("crypto: aead - Convert top level interface to new style") Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
* crypto: pcrypt - Use crypto_aead_set_reqsize helperHerbert Xu2015-05-131-3/+4
| | | | | | | This patch uses the crypto_aead_set_reqsize helper to avoid directly touching the internals of aead. Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
* crypto: include crypto- module prefix in templateKees Cook2014-11-261-0/+1
| | | | | | | | | | | | | | | | | | | This adds the module loading prefix "crypto-" to the template lookup as well. For example, attempting to load 'vfat(blowfish)' via AF_ALG now correctly includes the "crypto-" prefix at every level, correctly rejecting "vfat": net-pf-38 algif-hash crypto-vfat(blowfish) crypto-vfat(blowfish)-all crypto-vfat Reported-by: Mathias Krause <minipli@googlemail.com> Signed-off-by: Kees Cook <keescook@chromium.org> Acked-by: Mathias Krause <minipli@googlemail.com> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
* crypto: pcrypt - Fix wrong usage of rcu_dereference()Mathias Krause2013-12-051-1/+1
| | | | | | | | | | | | | | | | | | | | | | | | A kernel with enabled lockdep complains about the wrong usage of rcu_dereference() under a rcu_read_lock_bh() protected region. =============================== [ INFO: suspicious RCU usage. ] 3.13.0-rc1+ #126 Not tainted ------------------------------- linux/crypto/pcrypt.c:81 suspicious rcu_dereference_check() usage! other info that might help us debug this: rcu_scheduler_active = 1, debug_locks = 1 1 lock held by cryptomgr_test/153: #0: (rcu_read_lock_bh){.+....}, at: [<ffffffff812c8075>] pcrypt_do_parallel.isra.2+0x5/0x200 Fix that by using rcu_dereference_bh() instead. Signed-off-by: Mathias Krause <minipli@googlemail.com> Cc: "David S. Miller" <davem@davemloft.net> Acked-by: Steffen Klassert <steffen.klassert@secunet.com> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
* drivers: avoid format strings in names passed to alloc_workqueue()Kees Cook2013-07-031-2/+2
| | | | | | | | | | | | For the workqueue creation interfaces that do not expect format strings, make sure they cannot accidently be parsed that way. Additionally, clean up calls made with a single parameter that would be handled as a format string. Many callers are passing potentially dynamic string content, so use "%s" in those cases to avoid any potential accidents. Signed-off-by: Kees Cook <keescook@chromium.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* crypto: pcrypt - Use the online cpumask as the defaultSteffen Klassert2012-03-291-4/+4
| | | | | | | | | | | | We use the active cpumask to determine the superset of cpus to use for parallelization. However, the active cpumask is for internal usage of the scheduler and therefore not the appropriate cpumask for these purposes. So use the online cpumask instead. Reported-by: Peter Zijlstra <peterz@infradead.org> Signed-off-by: Steffen Klassert <steffen.klassert@secunet.com> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
* Merge git://git.kernel.org/pub/scm/linux/kernel/git/herbert/crypto-2.6Linus Torvalds2011-01-131-1/+2
|\ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | * git://git.kernel.org/pub/scm/linux/kernel/git/herbert/crypto-2.6: (46 commits) hwrng: via_rng - Fix memory scribbling on some CPUs crypto: padlock - Move padlock.h into include/crypto hwrng: via_rng - Fix asm constraints crypto: n2 - use __devexit not __exit in n2_unregister_algs crypto: mark crypto workqueues CPU_INTENSIVE crypto: mv_cesa - dont return PTR_ERR() of wrong pointer crypto: ripemd - Set module author and update email address crypto: omap-sham - backlog handling fix crypto: gf128mul - Remove experimental tag crypto: af_alg - fix af_alg memory_allocated data type crypto: aesni-intel - Fixed build with binutils 2.16 crypto: af_alg - Make sure sk_security is initialized on accept()ed sockets net: Add missing lockdep class names for af_alg include: Install linux/if_alg.h for user-space crypto API crypto: omap-aes - checkpatch --file warning fixes crypto: omap-aes - initialize aes module once per request crypto: omap-aes - unnecessary code removed crypto: omap-aes - error handling implementation improved crypto: omap-aes - redundant locking is removed crypto: omap-aes - DMA initialization fixes for OMAP off mode ...
| * crypto: mark crypto workqueues CPU_INTENSIVETejun Heo2011-01-041-1/+2
| | | | | | | | | | | | | | | | | | | | | | | | | | kcrypto_wq and pcrypt->wq's are used to run ciphers and may consume considerable amount of CPU cycles. Mark both as CPU_INTENSIVE so that they don't block other work items. As the workqueues are primarily used to burn CPU cycles, concurrency levels shouldn't matter much and are left at 1. A higher value may be beneficial and needs investigation. Signed-off-by: Tejun Heo <tj@kernel.org> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
* | crypto: pcrypt - Fix use after free on padata_freeSteffen Klassert2010-11-121-1/+0
|/ | | | | | | | | | kobject_put is called from padata_free for the padata kobject. The kobject's release function frees the padata instance, so don't call kobject_put for the padata kobject from pcrypt. Reported-and-tested-by: Randy Dunlap <randy.dunlap@oracle.com> Signed-off-by: Steffen Klassert <steffen.klassert@secunet.com> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* crypto: pcrypt - Update pcrypt cpumask according to the padata cpumask notifierSteffen Klassert2010-07-311-2/+11
| | | | | | | | | The padata cpumask change notifier passes a padata_cpumask to the notifier chain. So we use this cpumask instead of asking padata for the cpumask. Signed-off-by: Steffen Klassert <steffen.klassert@secunet.com> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
* crypto: pcrypt - Rename pcrypt_instanceSteffen Klassert2010-07-311-16/+14
| | | | | | | | | | | In the crypto-layer an instance refers usually to a crypto instance. The struct pcrypt_instance is not related to a crypto instance. It rather contains the padata informations, so we rename it to padata_pcrypt. The functions that handle this struct are renamed accordingly. Signed-off-by: Steffen Klassert <steffen.klassert@secunet.com> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
* padata: Rename padata_alloc functionsSteffen Klassert2010-07-311-1/+1
| | | | | | | | | | | | We rename padata_alloc to padata_alloc_possible because this function allocates a padata_instance and uses the cpu_possible mask for parallel and serial workers. Also we rename __padata_alloc to padata_alloc to avoid to export underlined functions. Underlined functions are considered to be private to padata. Users are updated accordingly. Signed-off-by: Steffen Klassert <steffen.klassert@secunet.com> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
* crypto: pcrypt - Dont calulate a callback cpu on empty callback cpumaskSteffen Klassert2010-07-261-0/+3
| | | | | | | | | If the callback cpumask is empty, we crash with a division by zero when we try to calculate a callback cpu. So we don't update the callback cpu in pcrypt_do_parallel if the callback cpumask is empty. Signed-off-by: Steffen Klassert <steffen.klassert@secunet.com> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
* pcrypt: Added sysfs interface to pcryptDan Kruchinin2010-07-191-3/+32
| | | | | | | | | Added sysfs interface to pcrypt. Now pcrypt subsystem creates two sysfs directories with corresponding padata sysfs objects: /sys/kernel/pcrypt/[pencrypt|pdecrypt] Signed-off-by: Dan Kruchinin <dkruchinin@acm.org> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
* padata: Make two separate cpumasksDan Kruchinin2010-07-191-54/+137
| | | | | | | | | | | | | | The aim of this patch is to make two separate cpumasks for padata parallel and serial workers respectively. It allows user to make more thin and sophisticated configurations of padata framework. For example user may bind parallel and serial workers to non-intersecting CPU groups to gain better performance. Also each padata instance has notifiers chain for its cpumasks now. If either parallel or serial or both masks were changed all interested subsystems will get notification about that. It's especially useful if padata user uses algorithm for callback CPU selection according to serial cpumask. Signed-off-by: Dan Kruchinin <dkruchinin@acm.org> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
* padata: make padata_do_parallel to return zero on successSteffen Klassert2010-07-141-12/+6
| | | | | | | | | | | | | To return -EINPROGRESS on success in padata_do_parallel was considered to be odd. This patch changes this to return zero on success. Also the only user of padata, pcrypt is adapted to convert a return of zero to -EINPROGRESS within the crypto layer. This also removes the pcrypt fallback if padata_do_parallel was called on a not running padata instance as we can't handle it anymore. This fallback was unused, so it's save to remove it. Signed-off-by: Steffen Klassert <steffen.klassert@secunet.com> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
* padata: Check for valid padata instance on startSteffen Klassert2010-07-141-5/+14
| | | | | | | | | | | | This patch introduces the PADATA_INVALID flag which is checked on padata start. This will be used to mark a padata instance as invalid, if the padata cpumask does not intersect with the active cpumask. we change padata_start to return an error if the PADATA_INVALID is set. Also we adapt the only padata user, pcrypt to this change. Signed-off-by: Steffen Klassert <steffen.klassert@secunet.com> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
* crypto: pcrypt - Handle crypto_get_attr_type errorsDan Carpenter2010-03-241-7/+4
| | | | | | | | | | | I was concerned about the error handling for crypto_get_attr_type() in pcrypt_alloc_aead(). Steffen Klassert pointed out that we could simply avoid calling crypto_get_attr_type() if we passed the type and mask as a parameters. Signed-off-by: Dan Carpenter <error27@gmail.com> Acked-by: Steffen Klassert <steffen.klassert@secunet.com> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
* crypto: pcrypt - call the complete function on errorSteffen Klassert2010-02-041-3/+3
| | | | | | | | This fixes three forgotten calls to the complete function in the error case. Signed-off-by: Steffen Klassert <steffen.klassert@secunet.com> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
* crypto: pcrypt - Add pcrypt crypto parallelization wrapperSteffen Klassert2010-01-071-0/+445
This patch adds a parallel crypto template that takes a crypto algorithm and converts it to process the crypto transforms in parallel. For the moment only aead algorithms are supported. Signed-off-by: Steffen Klassert <steffen.klassert@secunet.com> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
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