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Date: Fri, 12 May 2023 13:56:30 +0000
From: Chuck Lever III <chuck.lever@...cle.com>
To: Dan Carpenter <dan.carpenter@...aro.org>,
Naresh Kamboju <naresh.kamboju@...aro.org>
CC: open list <linux-kernel@...r.kernel.org>,
linux-mm <linux-mm@...ck.org>,
kasan-dev <kasan-dev@...glegroups.com>,
"kunit-dev@...glegroups.com" <kunit-dev@...glegroups.com>,
"lkft-triage@...ts.linaro.org" <lkft-triage@...ts.linaro.org>,
Marco Elver <elver@...gle.com>,
Andrew Morton <akpm@...ux-foundation.org>,
Mel Gorman <mgorman@...hsingularity.net>,
Andrey Ryabinin <aryabinin@...tuozzo.com>
Subject: Re: next: WARNING: CPU: 0 PID: 1200 at mm/page_alloc.c:4744
__alloc_pages+0x2e8/0x3a0
> On May 12, 2023, at 6:32 AM, Dan Carpenter <dan.carpenter@...aro.org> wrote:
>
> I'm pretty sure Chuck Lever did this intentionally, but he's not on the
> CC list. Let's add him.
>
> regards,
> dan carpenter
>
> On Fri, May 12, 2023 at 06:15:04PM +0530, Naresh Kamboju wrote:
>> Following kernel warning has been noticed on qemu-arm64 while running kunit
>> tests while booting Linux 6.4.0-rc1-next-20230512 and It was started from
>> 6.3.0-rc7-next-20230420.
>>
>> Reported-by: Linux Kernel Functional Testing <lkft@...aro.org>
>>
>> This is always reproducible on qemu-arm64, qemu-arm, qemu-x86 and qemu-i386.
>> Is this expected warning as a part of kunit tests ?
Dan's correct, this Kunit test is supposed to check the
behavior of the API when a too-large privsize is specified.
I'm not sure how to make this work without the superfluous
warning. Would adding GFP_NOWARN to the allocation help?
>> Crash log:
>> -----------
>>
>> [ 663.530868] KTAP version 1
>> [ 663.531545] # Subtest: Handshake API tests
>> [ 663.533521] 1..11
>> [ 663.534424] KTAP version 1
>> [ 663.535406] # Subtest: req_alloc API fuzzing
>> [ 663.542460] ok 1 handshake_req_alloc NULL proto
>> [ 663.550345] ok 2 handshake_req_alloc CLASS_NONE
>> [ 663.558041] ok 3 handshake_req_alloc CLASS_MAX
>> [ 663.565790] ok 4 handshake_req_alloc no callbacks
>> [ 663.573882] ok 5 handshake_req_alloc no done callback
>> [ 663.580284] ------------[ cut here ]------------
>> [ 663.582129] WARNING: CPU: 0 PID: 1200 at mm/page_alloc.c:4744
>> __alloc_pages+0x2e8/0x3a0
>> [ 663.585675] Modules linked in:
>> [ 663.587808] CPU: 0 PID: 1200 Comm: kunit_try_catch Tainted: G
>> N 6.4.0-rc1-next-20230512 #1
>> [ 663.589817] Hardware name: linux,dummy-virt (DT)
>> [ 663.591426] pstate: 22400005 (nzCv daif +PAN -UAO +TCO -DIT -SSBS BTYPE=--)
>> [ 663.592978] pc : __alloc_pages+0x2e8/0x3a0
>> [ 663.594236] lr : __kmalloc_large_node+0xbc/0x160
>> [ 663.595548] sp : ffff80000a317bc0
>> [ 663.596577] x29: ffff80000a317bc0 x28: 0000000000000000 x27: 0000000000000000
>> [ 663.598863] x26: ffff0000c8925b20 x25: 0000000000000000 x24: 0000000000000015
>> [ 663.601098] x23: 0000000000040dc0 x22: ffffbf424e7420c8 x21: ffffbf424e7420c8
>> [ 663.603100] x20: 1ffff00001462f88 x19: 0000000000040dc0 x18: 0000000078b4155a
>> [ 663.605582] x17: 0000000000000000 x16: 0000000000000000 x15: 0000000000000000
>> [ 663.607328] x14: 0000000000000000 x13: 6461657268745f68 x12: ffff60001913bc5a
>> [ 663.609355] x11: 1fffe0001913bc59 x10: ffff60001913bc59 x9 : 1fffe0001913bc59
>> [ 663.611004] x8 : 0000000041b58ab3 x7 : ffff700001462f88 x6 : dfff800000000000
>> [ 663.613556] x5 : 00000000f1f1f1f1 x4 : 00000000f2f2f200 x3 : 0000000000000000
>> [ 663.615364] x2 : 0000000000000000 x1 : 0000000000000001 x0 : ffffbf42516818e2
>> [ 663.617753] Call trace:
>> [ 663.618486] __alloc_pages+0x2e8/0x3a0
>> [ 663.619613] __kmalloc_large_node+0xbc/0x160
>> [ 663.621454] __kmalloc+0x84/0x94
>> [ 663.622551] handshake_req_alloc+0x74/0xe8
>> [ 663.623801] handshake_req_alloc_case+0xa0/0x170
>> [ 663.625467] kunit_try_run_case+0x7c/0x100
>> [ 663.626592] kunit_generic_run_threadfn_adapter+0x30/0x4c
>> [ 663.628998] kthread+0x1d4/0x1e4
>> [ 663.629715] ret_from_fork+0x10/0x20
>> [ 663.631094] ---[ end trace 0000000000000000 ]---
>> [ 663.643101] ok 6 handshake_req_alloc excessive privsize
>> [ 663.649446] ok 7 handshake_req_alloc all good
>> [ 663.651032] # req_alloc API fuzzing: pass:7 fail:0 skip:0 total:7
>> [ 663.653941] ok 1 req_alloc API fuzzing
>> [ 663.665951] ok 2 req_submit NULL req arg
>> [ 663.674278] ok 3 req_submit NULL sock arg
>> [ 663.682968] ok 4 req_submit NULL sock->file
>> [ 663.694323] ok 5 req_lookup works
>> [ 663.703604] ok 6 req_submit max pending
>> [ 663.714655] ok 7 req_submit multiple
>> [ 663.725174] ok 8 req_cancel before accept
>> [ 663.733780] ok 9 req_cancel after accept
>> [ 663.742528] ok 10 req_cancel after done
>> [ 663.750637] ok 11 req_destroy works
>> [ 663.751884] # Handshake API tests: pass:11 fail:0 skip:0 total:11
>> [ 663.753579] # Totals: pass:17 fail:0 skip:0 total:17
>>
>> links:
>> ------
>>
>> - https://qa-reports.linaro.org/lkft/linux-next-master/build/next-20230512/testrun/16901289/suite/log-parser-boot/test/check-kernel-exception/log
>> - https://qa-reports.linaro.org/lkft/linux-next-master/build/next-20230512/testrun/16901289/suite/log-parser-boot/tests/
>> - https://qa-reports.linaro.org/lkft/linux-next-master/build/next-20230420/testrun/16385677/suite/log-parser-boot/test/check-kernel-warning-ac79d2ca0f443d407d9749244f1738c9a2b123c609820f82d9e8907c756f5340/log
>> - https://qa-reports.linaro.org/lkft/linux-next-master/build/next-20230512/testrun/16901289/suite/log-parser-boot/test/check-kernel-warning-ac79d2ca0f443d407d9749244f1738c9a2b123c609820f82d9e8907c756f5340/history/
>>
>>
>> --
>> Linaro LKFT
>> https://lkft.linaro.org
--
Chuck Lever
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