[REGRESSION] alg: ahash: Several tests fail during boot on Turris Omnia

[Klaus Kudielka]

Hello,

with mainline kernel v6.12-rc1 I noticed a regression on my Turris Omnia (Marvell Armada 385), during my regular boot testing.
Several crypto self-tests now report "test failed (wrong result)":
	mv-hmac-sha256
	mv-hmac-md5
	mv-hmac-sh1
For reference, v6.11.0 is completely ok.

To be a bit more precise: Not all selftests reliably fail during all boots, but during most boots I get at least a single failure.

I was able to bisect this, and the culprit is:

	commit 37da5d0ffa ("crypto: api - Do not wait for tests during registration")

If I counted correctly, 3 of 4 boots reported self-test errors with that commit, and
0 of 3 boots reported self-test errors with its parent.

Example boot log with self-test errors (relevant parts only):

[    0.000000] Booting Linux on physical CPU 0x0
[    0.000000] Linux version 6.11.0-rc1+ (...) (arm-linux-gnueabihf-gcc (Debian 14.2.0-1) 14.2.0, GNU ld (GNU Binutils for Debian) 2.43.1) #1 SMP Sat Oct  5 11:58:34 CEST 2024
[    0.000000] CPU: ARMv7 Processor [414fc091] revision 1 (ARMv7), cr=10c5387d
[    0.000000] CPU: PIPT / VIPT nonaliasing data cache, VIPT aliasing instruction cache
[    0.000000] OF: fdt: Machine model: Turris Omnia
...
[    0.274868] marvell-cesa f1090000.crypto: CESA device successfully registered
...
[    0.330736] alg: ahash: mv-hmac-sha256 test failed (wrong result) on test vector 1, cfg="init+update+final aligned buffer"
[    0.332541] alg: ahash: mv-hmac-md5 test failed (wrong result) on test vector 1, cfg="init+update+final aligned buffer"
[    0.341851] alg: self-tests for hmac(sha256) using mv-hmac-sha256 failed (rc=-22)
[    0.352648] alg: self-tests for hmac(md5) using mv-hmac-md5 failed (rc=-22)
[    0.352653] ------------[ cut here ]------------
[    0.352656] ------------[ cut here ]------------
[    0.352656] WARNING: CPU: 0 PID: 73 at crypto/testmgr.c:5908 alg_test+0x5e4/0x60c
[    0.352659] WARNING: CPU: 1 PID: 71 at crypto/testmgr.c:5908 alg_test+0x5e4/0x60c
[    0.352669] alg: self-tests for hmac(sha256) using mv-hmac-sha256 failed (rc=-22)
[    0.352670] alg: self-tests for hmac(md5) using mv-hmac-md5 failed (rc=-22)
[    0.352673] Modules linked in:
[    0.352673] Modules linked in:
[    0.352680] CPU: 1 UID: 0 PID: 71 Comm: cryptomgr_test Not tainted 6.11.0-rc1+ #1
[    0.352688] Hardware name: Marvell Armada 380/385 (Device Tree)
[    0.352691] Call trace: 
[    0.352697]  unwind_backtrace from show_stack+0x10/0x14
[    0.352717]  show_stack from dump_stack_lvl+0x50/0x64
[    0.352731]  dump_stack_lvl from __warn+0x94/0xc0
[    0.352742]  __warn from warn_slowpath_fmt+0x110/0x16c
[    0.352757]  warn_slowpath_fmt from alg_test+0x5e4/0x60c
[    0.352768]  alg_test from cryptomgr_test+0x18/0x38
[    0.352777]  cryptomgr_test from kthread+0xdc/0xf8
[    0.352788]  kthread from ret_from_fork+0x14/0x28
[    0.352797] Exception stack(0xf0fb5fb0 to 0xf0fb5ff8)
[    0.352803] 5fa0:                                     00000000 00000000 00000000 00000000
[    0.352809] 5fc0: 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000
[    0.352814] 5fe0: 00000000 00000000 00000000 00000000 00000013 00000000
[    0.352818] ---[ end trace 0000000000000000 ]---
[    0.352819] CPU: 0 UID: 0 PID: 73 Comm: cryptomgr_test Not tainted 6.11.0-rc1+ #1
[    0.352828] Tainted: [W]=WARN
[    0.352831] Hardware name: Marvell Armada 380/385 (Device Tree)
[    0.352834] Call trace: 
[    0.352837]  unwind_backtrace from show_stack+0x10/0x14
[    0.352853]  show_stack from dump_stack_lvl+0x50/0x64
[    0.352866]  dump_stack_lvl from __warn+0x94/0xc0
[    0.352877]  __warn from warn_slowpath_fmt+0x110/0x16c
[    0.352891]  warn_slowpath_fmt from alg_test+0x5e4/0x60c
[    0.352902]  alg_test from cryptomgr_test+0x18/0x38
[    0.352910]  cryptomgr_test from kthread+0xdc/0xf8
[    0.352920]  kthread from ret_from_fork+0x14/0x28
[    0.352929] Exception stack(0xf0f11fb0 to 0xf0f11ff8)
[    0.352934] 1fa0:                                     00000000 00000000 00000000 00000000
[    0.352940] 1fc0: 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000
[    0.352946] 1fe0: 00000000 00000000 00000000 00000000 00000013 00000000
[    0.352953] ---[ end trace 0000000000000000 ]---
[    0.353088] alg: ahash: mv-hmac-sha1 test failed (wrong result) on test vector 0, cfg="init+update+final aligned buffer"
[    0.354325] mv88e6085 f1072004.mdio-mii:10: switch 0x1760 detected: Marvell 88E6176, revision 1
[    0.364023] alg: self-tests for hmac(sha1) using mv-hmac-sha1 failed (rc=-22)
[    0.364029] ------------[ cut here ]------------
[    0.364032] WARNING: CPU: 1 PID: 72 at crypto/testmgr.c:5908 alg_test+0x5e4/0x60c
[    0.364043] alg: self-tests for hmac(sha1) using mv-hmac-sha1 failed (rc=-22)
[    0.364046] Modules linked in:
[    0.364054] CPU: 1 UID: 0 PID: 72 Comm: cryptomgr_test Tainted: G        W          6.11.0-rc1+ #1
[    0.364062] Tainted: [W]=WARN
[    0.364065] Hardware name: Marvell Armada 380/385 (Device Tree)
[    0.364068] Call trace: 
[    0.364072]  unwind_backtrace from show_stack+0x10/0x14
[    0.364089]  show_stack from dump_stack_lvl+0x50/0x64
[    0.364102]  dump_stack_lvl from __warn+0x94/0xc0
[    0.364114]  __warn from warn_slowpath_fmt+0x110/0x16c
[    0.364127]  warn_slowpath_fmt from alg_test+0x5e4/0x60c
[    0.364139]  alg_test from cryptomgr_test+0x18/0x38
[    0.364147]  cryptomgr_test from kthread+0xdc/0xf8
[    0.364157]  kthread from ret_from_fork+0x14/0x28
[    0.364166] Exception stack(0xf0ef9fb0 to 0xf0ef9ff8)
[    0.364172] 9fa0:                                     00000000 00000000 00000000 00000000
[    0.364177] 9fc0: 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000
[    0.364183] 9fe0: 00000000 00000000 00000000 00000000 00000013 00000000
[    0.364187] ---[ end trace 0000000000000000 ]---

Best regards, Klaus

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