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2016-02-06crypto: algif_skcipher - Do not set MAY_BACKLOG on the async pathHerbert Xu1-2/+3
The async path cannot use MAY_BACKLOG because it is not meant to block, which is what MAY_BACKLOG does. On the other hand, both the sync and async paths can make use of MAY_SLEEP. Cc: stable@vger.kernel.org Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
2016-02-06crypto: algif_skcipher - Do not dereference ctx without socket lockHerbert Xu1-4/+11
Any access to non-constant bits of the private context must be done under the socket lock, in particular, this includes ctx->req. This patch moves such accesses under the lock, and fetches the tfm from the parent socket which is guaranteed to be constant, rather than from ctx->req. Cc: stable@vger.kernel.org Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
2016-02-06crypto: algif_skcipher - Do not assume that req is unchangedHerbert Xu1-32/+28
The async path in algif_skcipher assumes that the crypto completion function will be called with the original request. This is not necessarily the case. In fact there is no need for this anyway since we already embed information into the request with struct skcipher_async_req. This patch adds a pointer to that struct and then passes it as the data to the callback function. Cc: stable@vger.kernel.org Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au> Tested-by: Tadeusz Struk <tadeusz.struk@intel.com>
2016-01-22Merge branch 'linus' of ↵Linus Torvalds1-16/+156
git://git.kernel.org/pub/scm/linux/kernel/git/herbert/crypto-2.6 Pull crypto fixes from Herbert Xu: "This fixes the following issues: API: - A large number of bug fixes for the af_alg interface, credit goes to Dmitry Vyukov for discovering and reporting these issues. Algorithms: - sw842 needs to select crc32. - The soft dependency on crc32c is now in the correct spot. Drivers: - The atmel AES driver needs HAS_DMA. - The atmel AES driver was a missing break statement, fortunately it's only a debug function. - A number of bug fixes for the Intel qat driver" * 'linus' of git://git.kernel.org/pub/scm/linux/kernel/git/herbert/crypto-2.6: (24 commits) crypto: algif_skcipher - sendmsg SG marking is off by one crypto: crc32c - Fix crc32c soft dependency crypto: algif_skcipher - Load TX SG list after waiting crypto: atmel-aes - Add missing break to atmel_aes_reg_name crypto: algif_skcipher - Fix race condition in skcipher_check_key crypto: algif_hash - Fix race condition in hash_check_key crypto: CRYPTO_DEV_ATMEL_AES should depend on HAS_DMA lib: sw842: select crc32 crypto: af_alg - Forbid bind(2) when nokey child sockets are present crypto: algif_skcipher - Remove custom release parent function crypto: algif_hash - Remove custom release parent function crypto: af_alg - Allow af_af_alg_release_parent to be called on nokey path crypto: qat - update init_esram for C3xxx dev type crypto: qat - fix timeout issues crypto: qat - remove to call get_sram_bar_id for qat_c3xxx crypto: algif_skcipher - Add key check exception for cipher_null crypto: skcipher - Add crypto_skcipher_has_setkey crypto: algif_hash - Require setkey before accept(2) crypto: hash - Add crypto_ahash_has_setkey crypto: algif_skcipher - Add nokey compatibility path ...
2016-01-20crypto: algif_skcipher - sendmsg SG marking is off by oneHerbert Xu1-1/+2
We mark the end of the SG list in sendmsg and sendpage and unmark it on the next send call. Unfortunately the unmarking in sendmsg is off-by-one, leading to an SG list that is too short. Fixes: 0f477b655a52 ("crypto: algif - Mark sgl end at the end of data") Cc: stable@vger.kernel.org Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
2016-01-19crypto: algif_skcipher - Load TX SG list after waitingHerbert Xu1-7/+7
We need to load the TX SG list in sendmsg(2) after waiting for incoming data, not before. Cc: stable@vger.kernel.org Reported-by: Dmitry Vyukov <dvyukov@google.com> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au> Tested-by: Dmitry Vyukov <dvyukov@google.com>
2016-01-18crypto: algif_skcipher - Fix race condition in skcipher_check_keyHerbert Xu1-3/+6
We need to lock the child socket in skcipher_check_key as otherwise two simultaneous calls can cause the parent socket to be freed. Cc: stable@vger.kernel.org Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
2016-01-18crypto: algif_skcipher - Remove custom release parent functionHerbert Xu1-40/+3
This patch removes the custom release parent function as the generic af_alg_release_parent now works for nokey sockets too. Cc: stable@vger.kernel.org Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
2016-01-18crypto: algif_skcipher - Add key check exception for cipher_nullHerbert Xu1-1/+1
This patch adds an exception to the key check so that cipher_null users may continue to use algif_skcipher without setting a key. Cc: stable@vger.kernel.org Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
2016-01-18crypto: algif_skcipher - Add nokey compatibility pathHerbert Xu1-5/+144
This patch adds a compatibility path to support old applications that do acept(2) before setkey. Cc: stable@vger.kernel.org Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
2016-01-18crypto: algif_skcipher - Require setkey before accept(2)Herbert Xu1-7/+41
Some cipher implementations will crash if you try to use them without calling setkey first. This patch adds a check so that the accept(2) call will fail with -ENOKEY if setkey hasn't been done on the socket yet. Cc: stable@vger.kernel.org Reported-by: Dmitry Vyukov <dvyukov@google.com> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au> Tested-by: Dmitry Vyukov <dvyukov@google.com>
2016-01-13Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-nextLinus Torvalds1-2/+2
Pull networking updates from Davic Miller: 1) Support busy polling generically, for all NAPI drivers. From Eric Dumazet. 2) Add byte/packet counter support to nft_ct, from Floriani Westphal. 3) Add RSS/XPS support to mvneta driver, from Gregory Clement. 4) Implement IPV6_HDRINCL socket option for raw sockets, from Hannes Frederic Sowa. 5) Add support for T6 adapter to cxgb4 driver, from Hariprasad Shenai. 6) Add support for VLAN device bridging to mlxsw switch driver, from Ido Schimmel. 7) Add driver for Netronome NFP4000/NFP6000, from Jakub Kicinski. 8) Provide hwmon interface to mlxsw switch driver, from Jiri Pirko. 9) Reorganize wireless drivers into per-vendor directories just like we do for ethernet drivers. From Kalle Valo. 10) Provide a way for administrators "destroy" connected sockets via the SOCK_DESTROY socket netlink diag operation. From Lorenzo Colitti. 11) Add support to add/remove multicast routes via netlink, from Nikolay Aleksandrov. 12) Make TCP keepalive settings per-namespace, from Nikolay Borisov. 13) Add forwarding and packet duplication facilities to nf_tables, from Pablo Neira Ayuso. 14) Dead route support in MPLS, from Roopa Prabhu. 15) TSO support for thunderx chips, from Sunil Goutham. 16) Add driver for IBM's System i/p VNIC protocol, from Thomas Falcon. 17) Rationalize, consolidate, and more completely document the checksum offloading facilities in the networking stack. From Tom Herbert. 18) Support aborting an ongoing scan in mac80211/cfg80211, from Vidyullatha Kanchanapally. 19) Use per-bucket spinlock for bpf hash facility, from Tom Leiming. * git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next: (1375 commits) net: bnxt: always return values from _bnxt_get_max_rings net: bpf: reject invalid shifts phonet: properly unshare skbs in phonet_rcv() dwc_eth_qos: Fix dma address for multi-fragment skbs phy: remove an unneeded condition mdio: remove an unneed condition mdio_bus: NULL dereference on allocation error net: Fix typo in netdev_intersect_features net: freescale: mac-fec: Fix build error from phy_device API change net: freescale: ucc_geth: Fix build error from phy_device API change bonding: Prevent IPv6 link local address on enslaved devices IB/mlx5: Add flow steering support net/mlx5_core: Export flow steering API net/mlx5_core: Make ipv4/ipv6 location more clear net/mlx5_core: Enable flow steering support for the IB driver net/mlx5_core: Initialize namespaces only when supported by device net/mlx5_core: Set priority attributes net/mlx5_core: Connect flow tables net/mlx5_core: Introduce modify flow table command net/mlx5_core: Managing root flow table ...
2016-01-13Merge branch 'linus' of ↵Linus Torvalds1-5/+5
git://git.kernel.org/pub/scm/linux/kernel/git/herbert/crypto-2.6 Pull crypto update from Herbert Xu: "Algorithms: - Add RSA padding algorithm Drivers: - Add GCM mode support to atmel - Add atmel support for SAMA5D2 devices - Add cipher modes to talitos - Add rockchip driver for rk3288 - Add qat support for C3XXX and C62X" * 'linus' of git://git.kernel.org/pub/scm/linux/kernel/git/herbert/crypto-2.6: (103 commits) crypto: hifn_795x, picoxcell - use ablkcipher_request_cast crypto: qat - fix SKU definiftion for c3xxx dev crypto: qat - Fix random config build issue crypto: ccp - use to_pci_dev and to_platform_device crypto: qat - Rename dh895xcc mmp firmware crypto: 842 - remove WARN inside printk crypto: atmel-aes - add debug facilities to monitor register accesses. crypto: atmel-aes - add support to GCM mode crypto: atmel-aes - change the DMA threshold crypto: atmel-aes - fix the counter overflow in CTR mode crypto: atmel-aes - fix atmel-ctr-aes driver for RFC 3686 crypto: atmel-aes - create sections to regroup functions by usage crypto: atmel-aes - fix typo and indentation crypto: atmel-aes - use SIZE_IN_WORDS() helper macro crypto: atmel-aes - improve performances of data transfer crypto: atmel-aes - fix atmel_aes_remove() crypto: atmel-aes - remove useless AES_FLAGS_DMA flag crypto: atmel-aes - reduce latency of DMA completion crypto: atmel-aes - remove unused 'err' member of struct atmel_aes_dev crypto: atmel-aes - rework crypto request completion ...
2016-01-01Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/netDavid S. Miller1-31/+30
2015-12-28Merge branch 'linus' of ↵Linus Torvalds1-31/+30
git://git.kernel.org/pub/scm/linux/kernel/git/herbert/crypto-2.6 Pull crypto fix from Herbert Xu: "This fixes a bug in the algif_skcipher interface that can trigger a kernel WARN_ON from user-space. It does so by using the new skcipher interface which unlike the previous ablkcipher does not need to create extra geniv objects which is what was used to trigger the WARN_ON" * 'linus' of git://git.kernel.org/pub/scm/linux/kernel/git/herbert/crypto-2.6: crypto: algif_skcipher - Use new skcipher interface
2015-12-22crypto: algif_skcipher - Use new skcipher interfaceHerbert Xu1-31/+30
This patch replaces uses of ablkcipher with the new skcipher interface. Cc: stable@vger.kernel.org Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au> Tested-by: <smueller@chronox.de>
2015-12-04Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/netDavid S. Miller1-3/+3
Conflicts: drivers/net/ethernet/renesas/ravb_main.c kernel/bpf/syscall.c net/ipv4/ipmr.c All three conflicts were cases of overlapping changes. Signed-off-by: David S. Miller <davem@davemloft.net>
2015-12-01net: rename SOCK_ASYNC_NOSPACE and SOCK_ASYNC_WAITDATAEric Dumazet1-3/+3
This patch is a cleanup to make following patch easier to review. Goal is to move SOCK_ASYNC_NOSPACE and SOCK_ASYNC_WAITDATA from (struct socket)->flags to a (struct socket_wq)->flags to benefit from RCU protection in sock_wake_async() To ease backports, we rename both constants. Two new helpers, sk_set_bit(int nr, struct sock *sk) and sk_clear_bit(int net, struct sock *sk) are added so that following patch can change their implementation. Signed-off-by: Eric Dumazet <edumazet@google.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2015-11-30net: Generalise wq_has_sleeper helperHerbert Xu1-2/+2
The memory barrier in the helper wq_has_sleeper is needed by just about every user of waitqueue_active. This patch generalises it by making it take a wait_queue_head_t directly. The existing helper is renamed to skwq_has_sleeper. Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au> Signed-off-by: David S. Miller <davem@davemloft.net>
2015-11-17crypto: algif - Change some variable to size_tLABBE Corentin1-5/+5
Some variable are set as int but store only positive values. Furthermore there are used in operation/function that wait for unsigned value. This patch set them as size_t. Signed-off-by: LABBE Corentin <clabbe.montjoie@gmail.com> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
2015-08-17crypto: replace scatterwalk_sg_chain with sg_chainDan Williams1-1/+1
Signed-off-by: Dan Williams <dan.j.williams@intel.com> [hch: split from a larger patch by Dan] Signed-off-by: Christoph Hellwig <hch@lst.de> Acked-by: Herbert Xu <herbert@gondor.apana.org.au> Signed-off-by: Jens Axboe <axboe@fb.com>
2015-04-11new helper: msg_data_left()Al Viro1-2/+2
convert open-coded instances Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2015-04-09Merge branch 'iocb' into for-davemAl Viro1-1/+1
trivial conflict in net/socket.c and non-trivial one in crypto - that one had evaded aio_complete() removal. Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2015-04-02crypto: algif - explicitly mark end of datatadeusz.struk@intel.com1-4/+8
After the TX sgl is expanded we need to explicitly mark end of data at the last buffer that contains data. Changes in v2 - use type 'bool' and true/false for 'mark'. Signed-off-by: Tadeusz Struk <tadeusz.struk@intel.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2015-04-01crypto: algif - use kmalloc instead of kzallocTadeusz Struk1-1/+1
No need to use kzalloc to allocate sgls as the structure is initialized anyway. Signed-off-by: Tadeusz Struk <tadeusz.struk@intel.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2015-03-25crypto: algif - fix warn: unsigned 'used' is never less than zerotadeusz.struk@intel.com1-1/+1
Change type from unsigned long to int to fix an issue reported by kbuild robot: crypto/algif_skcipher.c:596 skcipher_recvmsg_async() warn: unsigned 'used' is never less than zero. Signed-off-by: Tadeusz Struk <tadeusz.struk@intel.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2015-03-23crypto: algif - change algif_skcipher to be asynchronousTadeusz Struk1-7/+226
The way the algif_skcipher works currently is that on sendmsg/sendpage it builds an sgl for the input data and then on read/recvmsg it sends the job for encryption putting the user to sleep till the data is processed. This way it can only handle one job at a given time. This patch changes it to be asynchronous by adding AIO support. Signed-off-by: Tadeusz Struk <tadeusz.struk@intel.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2015-03-02net: Remove iocb argument from sendmsg and recvmsgYing Xue1-4/+4
After TIPC doesn't depend on iocb argument in its internal implementations of sendmsg() and recvmsg() hooks defined in proto structure, no any user is using iocb argument in them at all now. Then we can drop the redundant iocb argument completely from kinds of implementations of both sendmsg() and recvmsg() in the entire networking stack. Cc: Christoph Hellwig <hch@lst.de> Suggested-by: Al Viro <viro@ZenIV.linux.org.uk> Signed-off-by: Ying Xue <ying.xue@windriver.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2015-02-14Merge git://git.kernel.org/pub/scm/linux/kernel/git/herbert/crypto-2.6Linus Torvalds1-0/+8
Pull crypto update from Herbert Xu: "Here is the crypto update for 3.20: - Added 192/256-bit key support to aesni GCM. - Added MIPS OCTEON MD5 support. - Fixed hwrng starvation and race conditions. - Added note that memzero_explicit is not a subsitute for memset. - Added user-space interface for crypto_rng. - Misc fixes" * git://git.kernel.org/pub/scm/linux/kernel/git/herbert/crypto-2.6: (71 commits) crypto: tcrypt - do not allocate iv on stack for aead speed tests crypto: testmgr - limit IV copy length in aead tests crypto: tcrypt - fix buflen reminder calculation crypto: testmgr - mark rfc4106(gcm(aes)) as fips_allowed crypto: caam - fix resource clean-up on error path for caam_jr_init crypto: caam - pair irq map and dispose in the same function crypto: ccp - terminate ccp_support array with empty element crypto: caam - remove unused local variable crypto: caam - remove dead code crypto: caam - don't emit ICV check failures to dmesg hwrng: virtio - drop extra empty line crypto: replace scatterwalk_sg_next with sg_next crypto: atmel - Free memory in error path crypto: doc - remove colons in comments crypto: seqiv - Ensure that IV size is at least 8 bytes crypto: cts - Weed out non-CBC algorithms MAINTAINERS: add linux-crypto to hw random crypto: cts - Remove bogus use of seqiv crypto: qat - don't need qat_auth_state struct crypto: algif_rng - fix sparse non static symbol warning ...
2015-02-11crypto: fix af_alg_make_sg() conversion to iov_iterLinus Torvalds1-3/+2
Commit 1d10eb2f156f ("crypto: switch af_alg_make_sg() to iov_iter") broke af_alg_make_sg() and skcipher_recvmsg() in the process of moving them to the iov_iter interfaces. The 'npages' calculation in the formar calculated the number of *bytes* in the pages, and in the latter case the conversion didn't re-read the value of 'ctx->used' after waiting for it to become non-zero. This reverts to the original code for both these cases. Cc: Al Viro <viro@zeniv.linux.org.uk> Cc: David Miller <davem@davemloft.net> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2015-02-04crypto: switch af_alg_make_sg() to iov_iterAl Viro1-41/+33
With that, all ->sendmsg() instances are converted to iov_iter primitives and are agnostic wrt the kind of iov_iter they are working with. So's the last remaining ->recvmsg() instance that wasn't kind-agnostic yet. All ->sendmsg() and ->recvmsg() advance ->msg_iter by the amount actually copied and none of them modifies the underlying iovec, etc. Cc: linux-crypto@vger.kernel.org Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2014-12-22crypto: algif - Mark sgl end at the end of dataTadeusz Struk1-0/+8
algif_skcipher sends 127 sgl buffers for encryption regardless of how many buffers acctually have data to process, where the few first with valid len and the rest with zero len. This is not very eficient. This patch marks the last one with data as the last one to process. Signed-off-by: Tadeusz Struk <tadeusz.struk@intel.com> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
2014-12-14Merge git://git.kernel.org/pub/scm/linux/kernel/git/herbert/crypto-2.6Linus Torvalds1-9/+6
Pull crypto update from Herbert Xu: - The crypto API is now documented :) - Disallow arbitrary module loading through crypto API. - Allow get request with empty driver name through crypto_user. - Allow speed testing of arbitrary hash functions. - Add caam support for ctr(aes), gcm(aes) and their derivatives. - nx now supports concurrent hashing properly. - Add sahara support for SHA1/256. - Add ARM64 version of CRC32. - Misc fixes. * git://git.kernel.org/pub/scm/linux/kernel/git/herbert/crypto-2.6: (77 commits) crypto: tcrypt - Allow speed testing of arbitrary hash functions crypto: af_alg - add user space interface for AEAD crypto: qat - fix problem with coalescing enable logic crypto: sahara - add support for SHA1/256 crypto: sahara - replace tasklets with kthread crypto: sahara - add support for i.MX53 crypto: sahara - fix spinlock initialization crypto: arm - replace memset by memzero_explicit crypto: powerpc - replace memset by memzero_explicit crypto: sha - replace memset by memzero_explicit crypto: sparc - replace memset by memzero_explicit crypto: algif_skcipher - initialize upon init request crypto: algif_skcipher - removed unneeded code crypto: algif_skcipher - Fixed blocking recvmsg crypto: drbg - use memzero_explicit() for clearing sensitive data crypto: drbg - use MODULE_ALIAS_CRYPTO crypto: include crypto- module prefix in template crypto: user - add MODULE_ALIAS crypto: sha-mb - remove a bogus NULL check crytpo: qat - Fix 64 bytes requests ...
2014-12-10put iov_iter into msghdrAl Viro1-2/+2
Note that the code _using_ ->msg_iter at that point will be very unhappy with anything other than unshifted iovec-backed iov_iter. We still need to convert users to proper primitives. Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2014-12-02crypto: algif_skcipher - initialize upon init requestStephan Mueller1-1/+3
When using the algif_skcipher, the following call sequence causess a re-initialization: 1. sendmsg with ALG_SET_OP and iov == NULL, iovlen == 0 (i.e initializing the cipher, but not sending data) 2. sendmsg with msg->msg-controllen == 0 and iov != NULL (using the initalized cipher handle by sending data) In step 2, the cipher operation type (encryption or decryption) is reset to always decryption, because the local variable of enc is put into ctx->enc as ctx->user is still zero. The same applies when all send data is processed and ctx->used falls to zero followed by user space to send new data. This patch changes the behavior to only reset the cipher operation type (and the IV) if such configuration request is received. Signed-off-by: Stephan Mueller <smueller@chronox.de> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
2014-12-01crypto: algif_skcipher - removed unneeded codeStruk, Tadeusz1-4/+0
Remover unneeded code. Signed-off-by: Tadeusz Struk <tadeusz.struk@intel.com> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
2014-11-28crypto: algif_skcipher - Fixed blocking recvmsgHerbert Xu1-3/+2
As most (all?) users of algif_skcipher are single-threaded and therefore always write before reading from an algif_skcipher socket, they never block and exercise that code-path. It turns out that code path doesn't even work because we never reload ctx->used after waking up so we never even see the new data and immediately return an error (and a loud WARN_ON). This patch fixes this by always reloading ctx->used. Reported-by: Stephan Mueller <smueller@chronox.de> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au> Acked-by: Stephan Mueller <smueller@chronox.de>
2014-11-25crypto: algif - add and use sock_kzfree_s() instead of memzero_explicit()Daniel Borkmann1-2/+1
Commit e1bd95bf7c25 ("crypto: algif - zeroize IV buffer") and 2a6af25befd0 ("crypto: algif - zeroize message digest buffer") added memzero_explicit() calls on buffers that are later on passed back to sock_kfree_s(). This is a discussed follow-up that, instead, extends the sock API and adds sock_kzfree_s(), which internally uses kzfree() instead of kfree() for passing the buffers back to slab. Having sock_kzfree_s() allows to keep the changes more minimal by just having a drop-in replacement instead of adding memzero_explicit() calls everywhere before sock_kfree_s(). In kzfree(), the compiler is not allowed to optimize the memset() away and thus there's no need for memzero_explicit(). Both, sock_kfree_s() and sock_kzfree_s() are wrappers for __sock_kfree_s() and call into kfree() resp. kzfree(); here, __sock_kfree_s() needs to be explicitly inlined as we want the compiler to optimize the call and condition away and thus it produces e.g. on x86_64 the _same_ assembler output for sock_kfree_s() before and after, and thus also allows for avoiding code duplication. Cc: David S. Miller <davem@davemloft.net> Signed-off-by: Daniel Borkmann <dborkman@redhat.com> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
2014-11-24new helper: memcpy_from_msg()Al Viro1-5/+5
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2014-11-12crypto: algif - zeroize IV bufferStephan Mueller1-0/+1
Zeroize the buffer holding the IV used for the completed cipher operation before the buffer is released by the skcipher AF_ALG interface handler. Signed-off-by: Stephan Mueller <smueller@chronox.de> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
2014-09-04crypto: algif - avoid excessive use of socket buffer in skcipherOndrej Kozina1-1/+1
On archs with PAGE_SIZE >= 64 KiB the function skcipher_alloc_sgl() fails with -ENOMEM no matter what user space actually requested. This is caused by the fact sock_kmalloc call inside the function tried to allocate more memory than allowed by the default kernel socket buffer size (kernel param net.core.optmem_max). Signed-off-by: Ondrej Kozina <okozina@redhat.com> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
2013-11-30net: update consumers of MSG_MORE to recognize MSG_SENDPAGE_NOTLASTShawn Landden1-0/+3
Commit 35f9c09fe (tcp: tcp_sendpages() should call tcp_push() once) added an internal flag MSG_SENDPAGE_NOTLAST, similar to MSG_MORE. algif_hash, algif_skcipher, and udp used MSG_MORE from tcp_sendpages() and need to see the new flag as identical to MSG_MORE. This fixes sendfile() on AF_ALG. v3: also fix udp Cc: Tom Herbert <therbert@google.com> Cc: Eric Dumazet <eric.dumazet@gmail.com> Cc: David S. Miller <davem@davemloft.net> Cc: <stable@vger.kernel.org> # 3.4.x + 3.2.x Reported-and-tested-by: Shawn Landden <shawnlandden@gmail.com> Original-patch: Richard Weinberger <richard@nod.at> Signed-off-by: Shawn Landden <shawn@churchofgit.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2013-11-21net: rework recvmsg handler msg_name and msg_namelen logicHannes Frederic Sowa1-1/+0
This patch now always passes msg->msg_namelen as 0. recvmsg handlers must set msg_namelen to the proper size <= sizeof(struct sockaddr_storage) to return msg_name to the user. This prevents numerous uninitialized memory leaks we had in the recvmsg handlers and makes it harder for new code to accidentally leak uninitialized memory. Optimize for the case recvfrom is called with NULL as address. We don't need to copy the address at all, so set it to NULL before invoking the recvmsg handler. We can do so, because all the recvmsg handlers must cope with the case a plain read() is called on them. read() also sets msg_name to NULL. Also document these changes in include/linux/net.h as suggested by David Miller. Changes since RFC: Set msg->msg_name = NULL if user specified a NULL in msg_name but had a non-null msg_namelen in verify_iovec/verify_compat_iovec. This doesn't affect sendto as it would bail out earlier while trying to copy-in the address. It also more naturally reflects the logic by the callers of verify_iovec. With this change in place I could remove " if (!uaddr || msg_sys->msg_namelen == 0) msg->msg_name = NULL ". This change does not alter the user visible error logic as we ignore msg_namelen as long as msg_name is NULL. Also remove two unnecessary curly brackets in ___sys_recvmsg and change comments to netdev style. Cc: David Miller <davem@davemloft.net> Suggested-by: Eric Dumazet <eric.dumazet@gmail.com> Signed-off-by: Hannes Frederic Sowa <hannes@stressinduktion.org> Signed-off-by: David S. Miller <davem@davemloft.net>
2013-04-10crypto: algif - suppress sending source address information in recvmsgMathias Krause1-0/+1
The current code does not set the msg_namelen member to 0 and therefore makes net/socket.c leak the local sockaddr_storage variable to userland -- 128 bytes of kernel stack memory. Fix that. Cc: <stable@vger.kernel.org> # 2.6.38 Signed-off-by: Mathias Krause <minipli@googlemail.com> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
2010-11-30crypto: algif_skcipher - Handle unaligned receive bufferHerbert Xu1-6/+7
As it is if user-space passes through a receive buffer that's not aligned to to the cipher block size, we'll end up encrypting or decrypting a partial block which causes a spurious EINVAL to be returned. This patch fixes this by moving the partial block test after the af_alg_make_sg call. Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
2010-11-30crypto: algif_skcipher - Fixed overflow when sndbuf is page alignedHerbert Xu1-21/+11
When sk_sndbuf is not a multiple of PAGE_SIZE, the limit tests in sendmsg fail as the limit variable becomes negative and we're using an unsigned comparison. The same thing can happen if sk_sndbuf is lowered after a sendmsg call. This patch fixes this by always taking the signed maximum of limit and 0 before we perform the comparison. It also rounds the value of sk_sndbuf down to a multiple of PAGE_SIZE so that we don't end up allocating a page only to use a small number of bytes in it because we're bound by sk_sndbuf. Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
2010-11-28crypto: algif_skcipher - Pass on error from af_alg_make_sgHerbert Xu1-1/+2
The error returned from af_alg_make_sg is currently lost and we always pass on -EINVAL. This patch pases on the underlying error. Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
2010-11-26crypto: algif_skcipher - User-space interface for skcipher operationsHerbert Xu1-0/+640
This patch adds the af_alg plugin for symmetric key ciphers, corresponding to the ablkcipher kernel operation type. Keys can optionally be set through the setsockopt interface. Once a sendmsg call occurs without MSG_MORE no further writes may be made to the socket until all previous data has been read. IVs and and whether encryption/decryption is performed can be set through the setsockopt interface or as a control message to sendmsg. The interface is completely synchronous, all operations are carried out in recvmsg(2) and will complete prior to the system call returning. The splice(2) interface support reading the user-space data directly without copying (except that the Crypto API itself may copy the data if alignment is off). The recvmsg(2) interface supports directly writing to user-space without additional copying, i.e., the kernel crypto interface will receive the user-space address as its output SG list. Thakns to Miloslav Trmac for reviewing this and contributing fixes and improvements. Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au> Acked-by: David S. Miller <davem@davemloft.net>