linux-hardening - Re: [PATCH v3 0/9] kunit: Add test attributes API

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Date:   Sat, 29 Jul 2023 15:53:07 +0800
From:   David Gow <davidgow@...gle.com>
To:     Guenter Roeck <linux@...ck-us.net>
Cc:     Rae Moar <rmoar@...gle.com>, shuah@...nel.org, dlatypov@...gle.com,
        brendan.higgins@...ux.dev, linux-kselftest@...r.kernel.org,
        kunit-dev@...glegroups.com, linux-kernel@...r.kernel.org,
        keescook@...omium.org, linux-hardening@...r.kernel.org,
        jstultz@...gle.com, tglx@...utronix.de, sboyd@...nel.org
Subject: Re: [PATCH v3 0/9] kunit: Add test attributes API

On Fri, 28 Jul 2023 at 18:38, Guenter Roeck <linux@...ck-us.net> wrote:
>
> On Tue, Jul 25, 2023 at 09:25:11PM +0000, Rae Moar wrote:
> > Hello everyone,
> >
> > This patch series adds a test attributes framework to KUnit.
> >
>
> With this series in linux-next, almost 50% of my boot tests crash,
> and many others show warnings tracebacks.
>
> Example crash from x86_64 boot attempt attached.
>
> Guenter
>
> ---

Hmm... It's not reproducing here (even with KASAN), which is strange.

Does the patch here help?
https://lore.kernel.org/linux-kselftest/20230729010003.4058582-1-ruanjinjie@huawei.com/

-- David

> [    6.165419] ok 6 lib_sort
> [    6.166044]     KTAP version 1
> [    6.166139]     # Subtest: kunit_executor_test
> [    6.166247]     # module: kunit
> [    6.166261]     1..8
> [    6.168252]     ok 1 parse_filter_test
> [    6.169579] BUG: unable to handle page fault for address: ffffd757e80004c8
> [    6.169872] #PF: supervisor read access in kernel mode
> [    6.169990] #PF: error_code(0x0000) - not-present page
> [    6.170142] PGD ffd4067 P4D ffd4067 PUD 0
> [    6.170346] Oops: 0000 [#1] PREEMPT SMP PTI
> [    6.170521] CPU: 0 PID: 182 Comm: kunit_try_catch Tainted: G                 N 6.5.0-rc3-next-20230728 #1
> [    6.170735] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS rel-1.16.2-0-gea1b7a073390-prebuilt.qemu.org 04/01/2014
> [    6.171024] RIP: 0010:kfree+0x61/0x140
> [    6.171313] Code: 80 48 01 e8 0f 82 ec 00 00 00 48 c7 c2 00 00 00 80 48 2b 15 29 bf aa 01 48 01 d0 48 c1 e8 0c 48 c1 e0 06 48 03 05 07 bf aa 01 <48> 8b 50 08 48 89 c7 f6 c2 01 0f 85 b3 00 00 00 66 90 48 8b 07 f6
> [    6.171715] RSP: 0000:ffffb48f80267dc8 EFLAGS: 00000286
> [    6.171847] RAX: ffffd757e80004c0 RBX: ffffa34583aef5d0 RCX: 0000000000000000
> [    6.171998] RDX: 00005cba00000000 RSI: ffffffff95cb1ad5 RDI: ffffb48f80013cd0
> [    6.172146] RBP: ffffb48f80013cd0 R08: 0000000000000001 R09: 0000000000000001
> [    6.172293] R10: 0000000000000001 R11: 0000000000000001 R12: ffffb48f80267e74
> [    6.172445] R13: 0000000000000000 R14: ffffa34583bf4000 R15: 0000000000000002
> [    6.172620] FS:  0000000000000000(0000) GS:ffffa3458f800000(0000) knlGS:0000000000000000
> [    6.172793] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
> [    6.172917] CR2: ffffd757e80004c8 CR3: 0000000009048000 CR4: 00000000007506f0
> [    6.173089] PKRU: 55555554
> [    6.173177] Call Trace:
> [    6.173313]  <TASK>
> [    6.173494]  ? __die+0x1f/0x70
> [    6.173600]  ? page_fault_oops+0x14a/0x460
> [    6.173693]  ? search_exception_tables+0x37/0x50
> [    6.173793]  ? fixup_exception+0x21/0x310
> [    6.173887]  ? exc_page_fault+0xee/0x1c0
> [    6.173977]  ? asm_exc_page_fault+0x26/0x30
> [    6.174076]  ? kunit_filter_suites+0x3a5/0x460
> [    6.174192]  ? kfree+0x61/0x140
> [    6.174271]  ? kfree+0x106/0x140
> [    6.174353]  kunit_filter_suites+0x3a5/0x460
> [    6.174473]  ? __pfx_kunit_generic_run_threadfn_adapter+0x10/0x10
> [    6.174604]  filter_suites_test+0xea/0x2c0
> [    6.174702]  ? __pfx_kunit_generic_run_threadfn_adapter+0x10/0x10
> [    6.174828]  kunit_generic_run_threadfn_adapter+0x15/0x20
> [    6.174941]  kthread+0xef/0x120
> [    6.175012]  ? __pfx_kthread+0x10/0x10
> [    6.175098]  ret_from_fork+0x2f/0x50
> [    6.175177]  ? __pfx_kthread+0x10/0x10
> [    6.175260]  ret_from_fork_asm+0x1b/0x30
> [    6.175387]  </TASK>
> [    6.175466] Modules linked in:
> [    6.175640] CR2: ffffd757e80004c8
> [    6.175887] ---[ end trace 0000000000000000 ]---
> [    6.176029] RIP: 0010:kfree+0x61/0x140
> [    6.176119] Code: 80 48 01 e8 0f 82 ec 00 00 00 48 c7 c2 00 00 00 80 48 2b 15 29 bf aa 01 48 01 d0 48 c1 e8 0c 48 c1 e0 06 48 03 05 07 bf aa 01 <48> 8b 50 08 48 89 c7 f6 c2 01 0f 85 b3 00 00 00 66 90 48 8b 07 f6
> [    6.176478] RSP: 0000:ffffb48f80267dc8 EFLAGS: 00000286
> [    6.176589] RAX: ffffd757e80004c0 RBX: ffffa34583aef5d0 RCX: 0000000000000000
> [    6.176729] RDX: 00005cba00000000 RSI: ffffffff95cb1ad5 RDI: ffffb48f80013cd0
> [    6.176869] RBP: ffffb48f80013cd0 R08: 0000000000000001 R09: 0000000000000001
> [    6.177008] R10: 0000000000000001 R11: 0000000000000001 R12: ffffb48f80267e74
> [    6.177150] R13: 0000000000000000 R14: ffffa34583bf4000 R15: 0000000000000002
> [    6.177290] FS:  0000000000000000(0000) GS:ffffa3458f800000(0000) knlGS:0000000000000000
> [    6.177448] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
> [    6.177564] CR2: ffffd757e80004c8 CR3: 0000000009048000 CR4: 00000000007506f0
> [    6.177704] PKRU: 55555554
> [    6.177807] note: kunit_try_catch[182] exited with irqs disabled
>
> --
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