linux-kernel - Re: [PATCH] crypto: Remove CRYPTO_ALG

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Message-ID: <aAqhbdiLmkHV350S@Red>
Date: Thu, 24 Apr 2025 22:39:09 +0200
From: Corentin Labbe <clabbe.montjoie@...il.com>
To: Herbert Xu <herbert@...dor.apana.org.au>
Cc: linux-crypto@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] crypto: Remove CRYPTO_ALG_ENGINE bit

Le Thu, Apr 24, 2025 at 10:42:51PM +0800, Herbert Xu a écrit :
> On Thu, Apr 24, 2025 at 02:09:34PM +0200, Corentin Labbe wrote:
> > 
> > Example on x86_64:
> > [    4.637589] BUG: kernel NULL pointer dereference, address: 0000000000000000
> > [    4.637822] #PF: supervisor instruction fetch in kernel mode
> > [    4.637931] #PF: error_code(0x0010) - not-present page
> > [    4.638166] PGD 0 P4D 0 
> > [    4.638359] Oops: Oops: 0010 [#1] SMP NOPTI
> > [    4.638808] CPU: 0 UID: 0 PID: 64 Comm: virtio1-engine Not tainted 6.15.0-rc1-g63dc06cd12f9 #1 PREEMPT(voluntary) 
> 
> This patch should fix the crypto_engine failures:
> 
> ---8<---
> Remove the private and obsolete CRYPTO_ALG_ENGINE bit which is
> conflicting with the new CRYPTO_ALG_DUP_FIRST bit.
> 
> Reported-by: Corentin Labbe <clabbe.montjoie@...il.com>
> Fixes: f1440a90465b ("crypto: api - Add support for duplicating algorithms before registration")
> Signed-off-by: Herbert Xu <herbert@...dor.apana.org.au>
> 

Thanks it fixes my crypto hw devices.
So Tested-by: Corentin LABBE <clabbe.montjoie@...il.com>

But I still got some crash with blake2b:
+[   54.348477] alg: shash: blake2b-256-neon test failed (wrong result) on test vector 1, cfg="init+update+final aligned buffer"
+[   54.348525] alg: self-tests for blake2b-256 using blake2b-256-neon failed (rc=-22)
+[   54.348536] ------------[ cut here ]------------
+[   54.348545] WARNING: CPU: 1 PID: 909 at crypto/testmgr.c:5871 alg_test+0x644/0x654
+[   54.348575] alg: self-tests for blake2b-256 using blake2b-256-neon failed (rc=-22)
+[   54.348583] Modules linked in: blake2b_neon(+) blake2b_generic rmd160 xxhash_generic ccm gcm crypto_null ghash_generic ghash_arm_ce camellia_generic fcrypt pcbc anubis wp512 khazad tea michael_mic arc4 libarc4 cast6_generic cast5_generic cast_common xctr serpent_generic lrw gf128mul twofish_generic twofish_common blowfish_generic blowfish_common md4 md5 tcrypt(+) cfg80211 bluetooth ecdh_generic ecc ctr sun8i_drm_hdmi uas des_generic libdes sun4i_codec snd_soc_core ac97_bus snd_pcm_dmaengine snd_pcm snd_timer snd lima drm_shmem_helper dw_hdmi gpu_sched aes_arm_bs aes_arm soundcore sunxi musb_hdrc sun4i_drm sun4i_frontend sun4i_tcon sun8i_mixer sun8i_ce sun8i_tcon_top drm_dma_helper display_connector
+[   54.348927] CPU: 1 UID: 0 PID: 909 Comm: cryptomgr_test Not tainted 6.15.0-rc1-g0ba1b8bdf183 #22 NONE 
+[   54.348941] Hardware name: Allwinner sun8i Family
+[   54.348947] Call trace: 
+[   54.348961]  unwind_backtrace from show_stack+0x10/0x14
+[   54.348989]  show_stack from dump_stack_lvl+0x54/0x68
+[   54.349010]  dump_stack_lvl from __warn+0x7c/0x128
+[   54.349035]  __warn from warn_slowpath_fmt+0x124/0x18c
+[   54.349059]  warn_slowpath_fmt from alg_test+0x644/0x654
+[   54.349081]  alg_test from cryptomgr_test+0x18/0x38
+[   54.349097]  cryptomgr_test from kthread+0x10c/0x238
+[   54.349121]  kthread from ret_from_fork+0x14/0x28
+[   54.349140] Exception stack(0xf0aa9fb0 to 0xf0aa9ff8)
+[   54.349151] 9fa0:                                     00000000 00000000 00000000 00000000
+[   54.349162] 9fc0: 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000
+[   54.349171] 9fe0: 00000000 00000000 00000000 00000000 00000013 00000000
+[   54.349177] ---[ end trace 0000000000000000 ]---

Regards