On Fri, 6 Jan 2017 13:08:27 +0800 kernel test robot <xiaolong.ye@xxxxxxxxx> wrote:
> FYI, we noticed the following commit:
>
> commit: 50a8fe7622e6c45af778d91f83c11491f0afaaf3 ("page_pool: basic implementation of page_pool")
> url: https://github.com/0day-ci/linux/commits/Jesper-Dangaard-Brouer/page_pool-proof-of-concept-early-code/20161221-014200
> base: git://git.cmpxchg.org/linux-mmotm.git master
>
> in testcase: trinity
> with following parameters:
>
> runtime: 300s
>
> test-description: Trinity is a linux system call fuzz tester.
> test-url: http://codemonkey.org.uk/projects/trinity/
>
>
> on test machine: qemu-system-i386 -enable-kvm -smp 2 -m 320M
This is because this RFC patch does not support 32-bit, as I'm using a
page flag that is only avail on 64-bit, see[1].
I though this kind of page-flags violation would be caught compile-time?
[1] https://github.com/0day-ci/linux/commit/50a8fe7622e6c45af778d91f83c11491f0afaaf3#diff-c684e72d6c55b89ae592b66e9ce818ee
> caused below changes:
>
>
> +------------------------------------------+------------+------------+
> | | 03fc8354e2 | 50a8fe7622 |
> +------------------------------------------+------------+------------+
> | boot_successes | 6 | 0 |
> | boot_failures | 0 | 4 |
> | kernel_BUG_at_mm/slub.c | 0 | 4 |
> | invalid_opcode:#[##]SMP_DEBUG_PAGEALLOC | 0 | 4 |
> | Kernel_panic-not_syncing:Fatal_exception | 0 | 4 |
> +------------------------------------------+------------+------------+
>
>
>
> [ 0.000000] .text : 0xc1000000 - 0xc188d0b7 (8756 kB)
> [ 0.000000] Checking if this processor honours the WP bit even in supervisor mode...Ok.
> [ 0.000000] ------------[ cut here ]------------
> [ 0.000000] kernel BUG at mm/slub.c:349!
> [ 0.000000] invalid opcode: 0000 [#1] SMP DEBUG_PAGEALLOC
> [ 0.000000] Modules linked in:
> [ 0.000000] CPU: 0 PID: 0 Comm: swapper Not tainted 4.9.0-mm1-00096-g50a8fe7 #1
> [ 0.000000] task: c1d4ea80 task.stack: c1d46000
> [ 0.000000] EIP: get_partial_node+0x148/0x330
> [ 0.000000] EFLAGS: 00210046 CPU: 0
> [ 0.000000] EAX: 00200082 EBX: d2d38000 ECX: 00000000 EDX: d2400010
> [ 0.000000] ESI: c1e3ef80 EDI: d2400000 EBP: c1d47e50 ESP: c1d47dc0
> [ 0.000000] DS: 007b ES: 007b FS: 00d8 GS: 0000 SS: 0068
> [ 0.000000] CR0: 80050033 CR2: ffbff000 CR3: 01e76000 CR4: 000006b0
> [ 0.000000] Call Trace:
> [ 0.000000] ? add_lock_to_list+0x7e/0xa7
> [ 0.000000] ? __lock_acquire+0x103a/0x1326
> [ 0.000000] ___slab_alloc+0x238/0x378
>
>
> To reproduce:
>
> git clone git://git.kernel.org/pub/scm/linux/kernel/git/wfg/lkp-tests.git
> cd lkp-tests
> bin/lkp qemu -k <bzImage> job-script # job-script is attached in this email
--
Best regards,
Jesper Dangaard Brouer
MSc.CS, Principal Kernel Engineer at Red Hat
LinkedIn: http://www.linkedin.com/in/brouer
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