Some algorithms have a ->setkey() method that is not atomic, in the
sense that setting a key can fail after changes were already made to the
tfm context.  In this case, if a key was already set the tfm can end up
in a state that corresponds to neither the old key nor the new key.

For example, in lrw.c, if gf128mul_init_64k_bbe() fails due to lack of
memory, then priv::table will be left NULL.  After that, encryption with
that tfm will cause a NULL pointer dereference.

It's not feasible to make all ->setkey() methods atomic, especially ones
that have to key multiple sub-tfms.  Therefore, make the crypto API set
CRYPTO_TFM_NEED_KEY if ->setkey() fails and the algorithm requires a
key, to prevent the tfm from being used until a new key is set.

[Cc stable mainly because when introducing the NEED_KEY flag I changed
 AF_ALG to rely on it; and unlike in-kernel crypto API users, AF_ALG
 previously didn't have this problem.  So these "incompletely keyed"
 states became theoretically accessible via AF_ALG -- though, the
 opportunities for causing real mischief seem pretty limited.]

Fixes: f8d33fac ("crypto: skcipher - prevent using skciphers without setting key")
Cc: <stable@vger.kernel.org> # v4.16+
Signed-off-by: Eric Biggers <ebiggers@google.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>

Some algorithms have a ->setkey() method that is not atomic, in the
sense that setting a key can fail after changes were already made to the
tfm context.  In this case, if a key was already set the tfm can end up
in a state that corresponds to neither the old key nor the new key.

It's not feasible to make all ->setkey() methods atomic, especially ones
that have to key multiple sub-tfms.  Therefore, make the crypto API set
CRYPTO_TFM_NEED_KEY if ->setkey() fails and the algorithm requires a
key, to prevent the tfm from being used until a new key is set.

Note: we can't set CRYPTO_TFM_NEED_KEY for OPTIONAL_KEY algorithms, so
->setkey() for those must nevertheless be atomic.  That's fine for now
since only the crc32 and crc32c algorithms set OPTIONAL_KEY, and it's
not intended that OPTIONAL_KEY be used much.

[Cc stable mainly because when introducing the NEED_KEY flag I changed
 AF_ALG to rely on it; and unlike in-kernel crypto API users, AF_ALG
 previously didn't have this problem.  So these "incompletely keyed"
 states became theoretically accessible via AF_ALG -- though, the
 opportunities for causing real mischief seem pretty limited.]

Fixes: 9fa68f62 ("crypto: hash - prevent using keyed hashes without setting key")
Cc: stable@vger.kernel.org
Signed-off-by: Eric Biggers <ebiggers@google.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>

It took me a while to notice the bug where the adiantum template left
crypto_spawn::inst == NULL, because this only caused problems in certain
cases where algorithms are dynamically loaded/unloaded.

More improvements are needed, but for now make crypto_init_spawn()
reject this case and WARN(), so this type of bug will be noticed
immediately in the future.

Note: I checked all callers and the adiantum template was the only place
that had this wrong.  So this WARN shouldn't trigger anymore.
Signed-off-by: Eric Biggers <ebiggers@google.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>

Now that all "blkcipher" templates have been converted to "skcipher",
crypto_alloc_instance() is no longer used.  And it's not useful any
longer as it creates an old-style weakly typed instance rather than a
new-style strongly typed instance.  So remove it, and now that the name
is freed up rename crypto_alloc_instance2() to crypto_alloc_instance().
Signed-off-by: Eric Biggers <ebiggers@google.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>

Convert the "ecb-cipher_null" algorithm from the deprecated "blkcipher"
API to the "skcipher" API.
Signed-off-by: Eric Biggers <ebiggers@google.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>

Convert the "ecb(arc4)" algorithm from the deprecated "blkcipher" API to
the "skcipher" API.

(Note that this is really a stream cipher and not a block cipher in ECB
mode as the name implies, but that's a problem for another day...)
Signed-off-by: Eric Biggers <ebiggers@google.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>

The PCBC template just wraps a single block cipher algorithm, so
simplify it by converting it to use skcipher_alloc_instance_simple().
Signed-off-by: Eric Biggers <ebiggers@google.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>

Following commit 944585a6 ("crypto: x86/aes-ni - remove special
handling of AES in PCBC mode"), it's no longer needed for the PCBC
template to support wrapping a cipher that has the CRYPTO_ALG_INTERNAL
flag set.  Thus, remove this now-unused functionality to make PCBC
consistent with the other single block cipher templates.
Signed-off-by: Eric Biggers <ebiggers@google.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>

The OFB template just wraps a single block cipher algorithm, so simplify
it by converting it to use skcipher_alloc_instance_simple().

Cc: Gilad Ben-Yossef <gilad@benyossef.com>
Signed-off-by: Eric Biggers <ebiggers@google.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>

Convert the keywrap template from the deprecated "blkcipher" API to the
"skcipher" API, taking advantage of skcipher_alloc_instance_simple() to
simplify it considerably.

Cc: Stephan Mueller <smueller@chronox.de>
Signed-off-by: Eric Biggers <ebiggers@google.com>
Reviewed-by: Stephan Mueller <smueller@chronox.de>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>

Convert the ECB template from the deprecated "blkcipher" API to the
"skcipher" API, taking advantage of skcipher_alloc_instance_simple() to
simplify it considerably.
Signed-off-by: Eric Biggers <ebiggers@google.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>

Convert the CTR template from the deprecated "blkcipher" API to the
"skcipher" API, taking advantage of skcipher_alloc_instance_simple() to
simplify it considerably.
Signed-off-by: Eric Biggers <ebiggers@google.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>

The CFB template just wraps a single block cipher algorithm, so simplify
it by converting it to use skcipher_alloc_instance_simple().

Cc: James Bottomley <James.Bottomley@HansenPartnership.com>
Signed-off-by: Eric Biggers <ebiggers@google.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>

The CBC template just wraps a single block cipher algorithm, so simplify
it by converting it to use skcipher_alloc_instance_simple().
Signed-off-by: Eric Biggers <ebiggers@google.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>

The majority of skcipher templates (including both the existing ones and
the ones remaining to be converted from the "blkcipher" API) just wrap a
single block cipher algorithm.  This includes cbc, cfb, ctr, ecb, kw,
ofb, and pcbc.  Add a helper function skcipher_alloc_instance_simple()
that handles allocating an skcipher instance for this common case.
Signed-off-by: Eric Biggers <ebiggers@google.com>
Reviewed-by: Stephan Mueller <smueller@chronox.de>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>

The memcpy()s in the PCBC implementation use walk->iv as both the source
and destination, which has undefined behavior.  These memcpy()'s are
actually unneeded, because walk->iv is already used to hold the previous
plaintext block XOR'd with the previous ciphertext block.  Thus,
walk->iv is already updated to its final value.

So remove the broken and unnecessary memcpy()s.

Fixes: 91652be5 ("[CRYPTO] pcbc: Add Propagated CBC template")
Cc: <stable@vger.kernel.org> # v2.6.21+
Cc: David Howells <dhowells@redhat.com>
Signed-off-by: Eric Biggers <ebiggers@google.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>

Fix multiple bugs in the OFB implementation:

1. It stored the per-request state 'cnt' in the tfm context, which can be
   used by multiple threads concurrently (e.g. via AF_ALG).
2. It didn't support messages not a multiple of the block cipher size,
   despite being a stream cipher.
3. It didn't set cra_blocksize to 1 to indicate it is a stream cipher.

To fix these, set the 'chunksize' property to the cipher block size to
guarantee that when walking through the scatterlist, a partial block can
only occur at the end.  Then change the implementation to XOR a block at
a time at first, then XOR the partial block at the end if needed.  This
is the same way CTR and CFB are implemented.  As a bonus, this also
improves performance in most cases over the current approach.

Fixes: e497c518 ("crypto: ofb - add output feedback mode")
Cc: <stable@vger.kernel.org> # v4.20+
Cc: Gilad Ben-Yossef <gilad@benyossef.com>
Signed-off-by: Eric Biggers <ebiggers@google.com>
Reviewed-by: Gilad Ben-Yossef <gilad@benyossef.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>

The memcpy() in crypto_cfb_decrypt_inplace() uses walk->iv as both the
source and destination, which has undefined behavior.  It is unneeded
because walk->iv is already used to hold the previous ciphertext block;
thus, walk->iv is already updated to its final value.  So, remove it.

Also, note that in-place decryption is the only case where the previous
ciphertext block is not directly available.  Therefore, as a related
cleanup I also updated crypto_cfb_encrypt_segment() to directly use the
previous ciphertext block rather than save it into walk->iv.  This makes
it consistent with in-place encryption and out-of-place decryption; now
only in-place decryption is different, because it has to be.

Fixes: a7d85e06 ("crypto: cfb - add support for Cipher FeedBack mode")
Cc: <stable@vger.kernel.org> # v4.17+
Cc: James Bottomley <James.Bottomley@HansenPartnership.com>
Signed-off-by: Eric Biggers <ebiggers@google.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>

Like some other block cipher mode implementations, the CFB
implementation assumes that while walking through the scatterlist, a
partial block does not occur until the end.  But the walk is incorrectly
being done with a blocksize of 1, as 'cra_blocksize' is set to 1 (since
CFB is a stream cipher) but no 'chunksize' is set.  This bug causes
incorrect encryption/decryption for some scatterlist layouts.

Fix it by setting the 'chunksize'.  Also extend the CFB test vectors to
cover this bug as well as cases where the message length is not a
multiple of the block size.

Fixes: a7d85e06 ("crypto: cfb - add support for Cipher FeedBack mode")
Cc: <stable@vger.kernel.org> # v4.17+
Cc: James Bottomley <James.Bottomley@HansenPartnership.com>
Signed-off-by: Eric Biggers <ebiggers@google.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>

A statement is indented with spaces and not indented enough, fix this
replacing spaces with a tab.
Signed-off-by: Colin Ian King <colin.king@canonical.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>

Fix typo "plcmul" to "pclmul"
Signed-off-by: Huaxuan Mao <minhaco@msn.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>

Fixes gcc '-Wunused-but-set-variable' warning:

drivers/crypto/chelsio/chcr_algo.c: In function 'chcr_device_init':
drivers/crypto/chelsio/chcr_algo.c:1371:18: warning:
 variable 'adap' set but not used [-Wunused-but-set-variable]

It not used since commit a1c6fd43 ("crypto: chelsio - Update ntx queue
received from cxgb4")
Signed-off-by: YueHaibing <yuehaibing@huawei.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>

set_msg_len may fails with -EOVERFLOW, It should be propagate
to upstream.

Fixes: 2debd332 ("crypto: chcr - Add AEAD algos.")
Signed-off-by: YueHaibing <yuehaibing@huawei.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>

Test cookie return by dmaengine_submit() and return error if any.
Signed-off-by: YueHaibing <yuehaibing@huawei.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>

This patch adds support for crypto4xx's ANSI X9.17 Annex C compliant
pseudo random number generator which provides a pseudo random source
for the purpose of generating  Initialization Vectors (IV's) for AES
algorithms to the Packet Engine and other pseudo random number
requirements.
Signed-off-by: Christian Lamparter <chunkeey@gmail.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>

Add xcbc(aes) offloading support.

Due to xcbc algorithm design and HW implementation in CAAM,
driver must still have some bytes to send to the crypto engine when
ahash_final() is called - such that HW correctly uses either K2 or K3
for the last block.
Signed-off-by: Iuliana Prodan <iuliana.prodan@nxp.com>
Signed-off-by: Horia Geantă <horia.geanta@nxp.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>

For keyed hash algorithms, shared descriptors are currently generated
twice:
-at tfm initialization time, in cra_init() callback
-in setkey() callback

Since it's mandatory to call setkey() for keyed algorithms, drop the
generation in cra_init().
Signed-off-by: Iuliana Prodan <iuliana.prodan@nxp.com>
Signed-off-by: Horia Geantă <horia.geanta@nxp.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>

Fix error reporting when preparation of an hmac algorithm
for registration fails: print the hmac algorithm name, not the unkeyed
hash algorithm name.
Signed-off-by: Iuliana Prodan <iuliana.prodan@nxp.com>
Signed-off-by: Horia Geantă <horia.geanta@nxp.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>

Correct copyright dates for files that have had code added
to them in 2018.
Signed-off-by: Gary R Hook <gary.hook@amd.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>

Fixes gcc '-Wunused-but-set-variable' warning:

drivers/crypto/chelsio/chtls/chtls_io.c: In function 'csk_wait_memory':
drivers/crypto/chelsio/chtls/chtls_io.c:925:6: warning:
 variable 'sndbuf' set but not used [-Wunused-but-set-variable]

drivers/crypto/chelsio/chtls/chtls_io.c: In function 'chtls_pt_recvmsg':
drivers/crypto/chelsio/chtls/chtls_io.c:1411:6: warning:
 variable 'request' set but not used [-Wunused-but-set-variable]

drivers/crypto/chelsio/chtls/chtls_io.c:1407:18: warning:
 variable 'adap' set but not used [-Wunused-but-set-variable]

drivers/crypto/chelsio/chtls/chtls_io.c: In function 'chtls_recvmsg':
drivers/crypto/chelsio/chtls/chtls_io.c:1701:6: warning:
 variable 'request' set but not used [-Wunused-but-set-variable]

drivers/crypto/chelsio/chtls/chtls_io.c:1697:20: warning:
 variable 'hws' set but not used [-Wunused-but-set-variable]
Signed-off-by: YueHaibing <yuehaibing@huawei.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>

'struct cipher_desc' is unused.  Remove it.
Signed-off-by: Eric Biggers <ebiggers@google.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>

There are several issues with symbols shared b/w:
-caam/jr and caam/qi drivers on one hand
-caam/qi2 driver on the other hand

Commit 52813ab2 ("crypto: caam/qi2 - avoid double export") fixed
some of them, however compilation still fails for CRYPTO_DEV_FSL_CAAM=m
and CRYPTO_DEV_FSL_DPAA2_CAAM=y.

Another issue is related to dependency cycles reported by depmod when
CRYPTO_DEV_FSL_CAAM=n and CRYPTO_DEV_FSL_DPAA2_CAAM=m, as mentioned in
82c7b351 ("Revert "arm64: defconfig: Enable FSL_MC_BUS and FSL_MC_DPIO"")

To fix all these, move the symbols shared by these drivers in a common
location. The only existing possibility is error.c file (note that naming
doesn't help and should probably change).

Fixes: 52813ab2 ("crypto: caam/qi2 - avoid double export")
Reported-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Horia Geantă <horia.geanta@nxp.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>

sm3_compress() calls rol32() with shift >= 32, which causes undefined
behavior.  This is easily detected by enabling CONFIG_UBSAN.

Explicitly AND with 31 to make the behavior well defined.

Fixes: 4f0fc160 ("crypto: sm3 - add OSCCA SM3 secure hash")
Cc: <stable@vger.kernel.org> # v4.15+
Cc: Gilad Ben-Yossef <gilad@benyossef.com>
Signed-off-by: Eric Biggers <ebiggers@google.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>

[    2.364486] WARNING: CPU: 0 PID: 60 at ./arch/powerpc/include/asm/io.h:837 dma_nommu_map_page+0x44/0xd4
[    2.373579] CPU: 0 PID: 60 Comm: cryptomgr_test Tainted: G        W         4.20.0-rc5-00560-g6bfb52e23a00-dirty #531
[    2.384740] NIP:  c000c540 LR: c000c584 CTR: 00000000
[    2.389743] REGS: c95abab0 TRAP: 0700   Tainted: G        W          (4.20.0-rc5-00560-g6bfb52e23a00-dirty)
[    2.400042] MSR:  00029032 <EE,ME,IR,DR,RI>  CR: 24042204  XER: 00000000
[    2.406669]
[    2.406669] GPR00: c02f2244 c95abb60 c6262990 c95abd80 0000256a 00000001 00000001 00000001
[    2.406669] GPR08: 00000000 00002000 00000010 00000010 24042202 00000000 00000100 c95abd88
[    2.406669] GPR16: 00000000 c05569d4 00000001 00000010 c95abc88 c0615664 00000004 00000000
[    2.406669] GPR24: 00000010 c95abc88 c95abc88 00000000 c61ae210 c7ff6d40 c61ae210 00003d68
[    2.441559] NIP [c000c540] dma_nommu_map_page+0x44/0xd4
[    2.446720] LR [c000c584] dma_nommu_map_page+0x88/0xd4
[    2.451762] Call Trace:
[    2.454195] [c95abb60] [82000808] 0x82000808 (unreliable)
[    2.459572] [c95abb80] [c02f2244] talitos_edesc_alloc+0xbc/0x3c8
[    2.465493] [c95abbb0] [c02f2600] ablkcipher_edesc_alloc+0x4c/0x5c
[    2.471606] [c95abbd0] [c02f4ed0] ablkcipher_encrypt+0x20/0x64
[    2.477389] [c95abbe0] [c02023b0] __test_skcipher+0x4bc/0xa08
[    2.483049] [c95abe00] [c0204b60] test_skcipher+0x2c/0xcc
[    2.488385] [c95abe20] [c0204c48] alg_test_skcipher+0x48/0xbc
[    2.494064] [c95abe40] [c0205cec] alg_test+0x164/0x2e8
[    2.499142] [c95abf00] [c0200dec] cryptomgr_test+0x48/0x50
[    2.504558] [c95abf10] [c0039ff4] kthread+0xe4/0x110
[    2.509471] [c95abf40] [c000e1d0] ret_from_kernel_thread+0x14/0x1c
[    2.515532] Instruction dump:
[    2.518468] 7c7e1b78 7c9d2378 7cbf2b78 41820054 3d20c076 8089c200 3d20c076 7c84e850
[    2.526127] 8129c204 7c842e70 7f844840 419c0008 <0fe00000> 2f9e0000 54847022 7c84fa14
[    2.533960] ---[ end trace bf78d94af73fe3b8 ]---
[    2.539123] talitos ff020000.crypto: master data transfer error
[    2.544775] talitos ff020000.crypto: TEA error: ISR 0x20000000_00000040
[    2.551625] alg: skcipher: encryption failed on test 1 for ecb-aes-talitos: ret=22

IV cannot be on stack when CONFIG_VMAP_STACK is selected because the stack
cannot be DMA mapped anymore.

This patch copies the IV into the extended descriptor.

Fixes: 4de9d0b5 ("crypto: talitos - Add ablkcipher algorithms")
Cc: stable@vger.kernel.org
Signed-off-by: Christophe Leroy <christophe.leroy@c-s.fr>
Reviewed-by: Horia Geantă <horia.geanta@nxp.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>

This patch moves the mapping of IV after the kmalloc(). This
avoids having to unmap in case kmalloc() fails.
Signed-off-by: Christophe Leroy <christophe.leroy@c-s.fr>
Reviewed-by: Horia Geantă <horia.geanta@nxp.com>
Cc: stable@vger.kernel.org
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>

crypto_grab_*() doesn't set crypto_spawn::inst, so templates must set it
beforehand.  Otherwise it will be left NULL, which causes a crash in
certain cases where algorithms are dynamically loaded/unloaded.  E.g.
with CONFIG_CRYPTO_CHACHA20_X86_64=m, the following caused a crash:

    insmod chacha-x86_64.ko
    python -c 'import socket; socket.socket(socket.AF_ALG, 5, 0).bind(("skcipher", "adiantum(xchacha12,aes)"))'
    rmmod chacha-x86_64.ko
    python -c 'import socket; socket.socket(socket.AF_ALG, 5, 0).bind(("skcipher", "adiantum(xchacha12,aes)"))'

Fixes: 059c2a4d ("crypto: adiantum - add Adiantum support")
Signed-off-by: Eric Biggers <ebiggers@google.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>

We free "sr" and then dereference it on the next line.

Fixes: c9613335 ("crypto: cavium/nitrox - Added AEAD cipher support")
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>

Authencesn template in decrypt path unconditionally calls aead_request_complete
after ahash_verify which leads to following kernel panic in after decryption.

[  338.539800] BUG: unable to handle kernel NULL pointer dereference at 0000000000000004
[  338.548372] PGD 0 P4D 0
[  338.551157] Oops: 0000 [#1] SMP PTI
[  338.554919] CPU: 0 PID: 0 Comm: swapper/0 Kdump: loaded Tainted: G        W I       4.19.7+ #13
[  338.564431] Hardware name: Supermicro X8ST3/X8ST3, BIOS 2.0        07/29/10
[  338.572212] RIP: 0010:esp_input_done2+0x350/0x410 [esp4]
[  338.578030] Code: ff 0f b6 68 10 48 8b 83 c8 00 00 00 e9 8e fe ff ff 8b 04 25 04 00 00 00 83 e8 01 48 98 48 8b 3c c5 10 00 00 00 e9 f7 fd ff ff <8b> 04 25 04 00 00 00 83 e8 01 48 98 4c 8b 24 c5 10 00 00 00 e9 3b
[  338.598547] RSP: 0018:ffff911c97803c00 EFLAGS: 00010246
[  338.604268] RAX: 0000000000000002 RBX: ffff911c4469ee00 RCX: 0000000000000000
[  338.612090] RDX: 0000000000000000 RSI: 0000000000000130 RDI: ffff911b87c20400
[  338.619874] RBP: 0000000000000000 R08: ffff911b87c20498 R09: 000000000000000a
[  338.627610] R10: 0000000000000001 R11: 0000000000000004 R12: 0000000000000000
[  338.635402] R13: ffff911c89590000 R14: ffff911c91730000 R15: 0000000000000000
[  338.643234] FS:  0000000000000000(0000) GS:ffff911c97800000(0000) knlGS:0000000000000000
[  338.652047] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  338.658299] CR2: 0000000000000004 CR3: 00000001ec20a000 CR4: 00000000000006f0
[  338.666382] Call Trace:
[  338.669051]  <IRQ>
[  338.671254]  esp_input_done+0x12/0x20 [esp4]
[  338.675922]  chcr_handle_resp+0x3b5/0x790 [chcr]
[  338.680949]  cpl_fw6_pld_handler+0x37/0x60 [chcr]
[  338.686080]  chcr_uld_rx_handler+0x22/0x50 [chcr]
[  338.691233]  uldrx_handler+0x8c/0xc0 [cxgb4]
[  338.695923]  process_responses+0x2f0/0x5d0 [cxgb4]
[  338.701177]  ? bitmap_find_next_zero_area_off+0x3a/0x90
[  338.706882]  ? matrix_alloc_area.constprop.7+0x60/0x90
[  338.712517]  ? apic_update_irq_cfg+0x82/0xf0
[  338.717177]  napi_rx_handler+0x14/0xe0 [cxgb4]
[  338.722015]  net_rx_action+0x2aa/0x3e0
[  338.726136]  __do_softirq+0xcb/0x280
[  338.730054]  irq_exit+0xde/0xf0
[  338.733504]  do_IRQ+0x54/0xd0
[  338.736745]  common_interrupt+0xf/0xf

Fixes: 104880a6 ("crypto: authencesn - Convert to new AEAD...")
Signed-off-by: Harsh Jain <harsh@chelsio.com>
Cc: stable@vger.kernel.org
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>

The addition of Chacha20 + Poly1305 authenc support inadvertently broke
detection of algorithms supported by MDHA (Message Digest Hardware
Accelerator), fix it.

Fixes: d6bbd4ee ("crypto: caam/jr - add support for Chacha20 + Poly1305")
Signed-off-by: Horia Geantă <horia.geanta@nxp.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>

Recent changes - probably DMA API related (generic and/or arm64-specific) -
exposed a case where driver maps a zero-length buffer:
ahash_init()->ahash_update()->ahash_final() with a zero-length string to
hash

kernel BUG at kernel/dma/swiotlb.c:475!
Internal error: Oops - BUG: 0 [#1] PREEMPT SMP
Modules linked in:
CPU: 2 PID: 1823 Comm: cryptomgr_test Not tainted 4.20.0-rc1-00108-g00c9fe37 #1
Hardware name: LS1046A RDB Board (DT)
pstate: 80000005 (Nzcv daif -PAN -UAO)
pc : swiotlb_tbl_map_single+0x170/0x2b8
lr : swiotlb_map_page+0x134/0x1f8
sp : ffff00000f79b8f0
x29: ffff00000f79b8f0 x28: 0000000000000000
x27: ffff0000093d0000 x26: 0000000000000000
x25: 00000000001f3ffe x24: 0000000000200000
x23: 0000000000000000 x22: 00000009f2c538c0
x21: ffff800970aeb410 x20: 0000000000000001
x19: ffff800970aeb410 x18: 0000000000000007
x17: 000000000000000e x16: 0000000000000001
x15: 0000000000000019 x14: c32cb8218a167fe8
x13: ffffffff00000000 x12: ffff80097fdae348
x11: 0000800976bca000 x10: 0000000000000010
x9 : 0000000000000000 x8 : ffff0000091fd6c8
x7 : 0000000000000000 x6 : 00000009f2c538bf
x5 : 0000000000000000 x4 : 0000000000000001
x3 : 0000000000000000 x2 : 00000009f2c538c0
x1 : 00000000f9fff000 x0 : 0000000000000000
Process cryptomgr_test (pid: 1823, stack limit = 0x(____ptrval____))
Call trace:
 swiotlb_tbl_map_single+0x170/0x2b8
 swiotlb_map_page+0x134/0x1f8
 ahash_final_no_ctx+0xc4/0x6cc
 ahash_final+0x10/0x18
 crypto_ahash_op+0x30/0x84
 crypto_ahash_final+0x14/0x1c
 __test_hash+0x574/0xe0c
 test_hash+0x28/0x80
 __alg_test_hash+0x84/0xd0
 alg_test_hash+0x78/0x144
 alg_test.part.30+0x12c/0x2b4
 alg_test+0x3c/0x68
 cryptomgr_test+0x44/0x4c
 kthread+0xfc/0x128
 ret_from_fork+0x10/0x18
Code: d34bfc18 2a1a03f7 1a9f8694 35fff89a (d4210000)

Cc: <stable@vger.kernel.org>
Signed-off-by: Aymen Sghaier <aymen.sghaier@nxp.com>
Signed-off-by: Horia Geantă <horia.geanta@nxp.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>