linux-kernel - [lkp-robot] [tools/bpf] 8c417dc15f: BUG:sleeping_function_called_from_invalid_context_at

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Date:   Sat, 27 Jan 2018 16:04:36 +0800
From:   kernel test robot <xiaolong.ye@...el.com>
To:     Yonghong Song <yhs@...com>
Cc:     Daniel Borkmann <daniel@...earbox.net>,
        LKML <linux-kernel@...r.kernel.org>,
        Stephen Rothwell <sfr@...b.auug.org.au>, lkp@...org
Subject: [lkp-robot] [tools/bpf]  8c417dc15f:
 BUG:sleeping_function_called_from_invalid_context_at_mm/slab.h


FYI, we noticed the following commit (built with gcc-7):

commit: 8c417dc15f9522672795981dcb63d9099ca6bd8c ("tools/bpf: add a testcase for MAP_GET_NEXT_KEY command of LPM_TRIE map")
https://git.kernel.org/cgit/linux/kernel/git/next/linux-next.git master

in testcase: kernel_selftests
with following parameters:


test-description: The kernel contains a set of "self tests" under the tools/testing/selftests/ directory. These are intended to be small unit tests to exercise individual code paths in the kernel.
test-url: https://www.kernel.org/doc/Documentation/kselftest.txt


on test machine: qemu-system-x86_64 -enable-kvm -cpu host -smp 2 -m 4G

caused below changes (please refer to attached dmesg/kmsg for entire log/backtrace):


+---------------------------------------------------------------------+------------+------------+
|                                                                     | b471f2f1de | 8c417dc15f |
+---------------------------------------------------------------------+------------+------------+
| boot_successes                                                      | 0          | 0          |
| boot_failures                                                       | 8          | 8          |
| invoked_oom-killer:gfp_mask=0x                                      | 4          | 4          |
| Mem-Info                                                            | 4          | 4          |
| Kernel_panic-not_syncing:Out_of_memory_and_no_killable_processes    | 4          | 4          |
| BUG:sleeping_function_called_from_invalid_context_at_lib/usercopy.c | 4          |            |
| BUG:sleeping_function_called_from_invalid_context_at_mm/slab.h      | 0          | 4          |
+---------------------------------------------------------------------+------------+------------+



[  275.143042] BUG: sleeping function called from invalid context at mm/slab.h:419
[  275.146347] in_atomic(): 1, irqs_disabled(): 0, pid: 7020, name: test_lpm_map
[  275.148889] CPU: 0 PID: 7020 Comm: test_lpm_map Not tainted 4.15.0-rc8-01647-g8c417dc #1
[  275.151961] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.10.2-1 04/01/2014
[  275.155015] Call Trace:
[  275.156181]  dump_stack+0x5c/0x7b
[  275.157563]  ___might_sleep+0xf1/0x110
[  275.159078]  __kmalloc+0x178/0x210
[  275.160459]  trie_get_next_key+0x57/0x2a0
[  275.162019]  ? _cond_resched+0x19/0x30
[  275.163494]  ? __kmalloc+0x17d/0x210
[  275.165010]  SyS_bpf+0xdbb/0x14b0
[  275.166359]  ? _cond_resched+0x19/0x30
[  275.167851]  entry_SYSCALL_64_fastpath+0x20/0x83
[  275.169616] RIP: 0033:0x7fce862efe19
[  275.171053] RSP: 002b:00007ffccbb62668 EFLAGS: 00000202
[  275.183028] test_lpm: OK
[  275.184984] 
[  275.188333] ok 1..5 selftests: test_lpm_map [PASS]
[  275.188338] 
[  275.191610] selftests: test_progs
[  275.191615] 
[  275.208854] ========================================
[  275.208859] 
[  275.731322] libbpf: incorrect bpf_call opcode
[  275.731329] 
[  275.739681] libbpf: incorrect bpf_call opcode
[  275.739687] 
[  275.768456] test_pkt_access:PASS:ipv4 165 nsec
[  275.768463] 
[  275.775864] test_pkt_access:PASS:ipv6 162 nsec
[  275.775869] 
[  275.783113] test_xdp:PASS:ipv4 4283 nsec
[  275.783251] 
[  275.798987] test_xdp:PASS:ipv6 1919 nsec
[  275.798992] 
[  275.811095] test_l4lb:PASS:ipv4 1860 nsec
[  275.811248] 
[  275.820459] test_l4lb:PASS:ipv6 3139 nsec
[  275.820464] 
[  275.825614] test_tcp_estats:PASS: 0 nsec
[  275.825618] 
[  275.831543] test_bpf_obj_id:PASS:get-fd-by-notexist-prog-id 0 nsec
[  275.831548] 
[  275.838707] test_bpf_obj_id:PASS:get-fd-by-notexist-map-id 0 nsec
[  275.838712] 
[  275.845485] test_bpf_obj_id:PASS:get-map-info(fd) 0 nsec
[  275.845490] 
[  275.851833] test_bpf_obj_id:PASS:get-prog-info(fd) 0 nsec
[  275.851838] 
[  275.858121] test_bpf_obj_id:PASS:get-map-info(fd) 0 nsec
[  275.858126] 
[  275.862282] test_bpf_obj_id:PASS:get-prog-info(fd) 0 nsec
[  275.862286] 
[  275.866722] test_bpf_obj_id:PASS:get-prog-fd(next_id) 0 nsec
[  275.866726] 
[  275.871573] test_bpf_obj_id:PASS:get-prog-fd(next_id) 0 nsec
[  275.871577] 
[  275.876121] test_bpf_obj_id:PASS:get-prog-fd(next_id) 0 nsec
[  275.876125] 
[  275.880766] test_bpf_obj_id:PASS:get-prog-fd(next_id) 0 nsec
[  275.880769] 
[  275.885053] test_bpf_obj_id:PASS:get-prog-fd(next_id) 0 nsec
[  275.885057] 
[  275.889288] test_bpf_obj_id:PASS:get-prog-fd-bad-nr-map-ids 0 nsec
[  275.889291] 
[  275.894180] test_bpf_obj_id:PASS:get-prog-info(next_id->fd) 0 nsec
[  275.894184] 
[  275.900509] test_bpf_obj_id:PASS:get-prog-fd(next_id) 0 nsec
[  275.900513] 
[  275.905233] test_bpf_obj_id:PASS:get-prog-fd-bad-nr-map-ids 0 nsec
[  275.905236] 
[  275.910550] test_bpf_obj_id:PASS:get-prog-info(next_id->fd) 0 nsec
[  275.910554] 
[  275.917881] test_bpf_obj_id:PASS:check total prog id found by get_next_id 0 nsec
[  275.917885] 
[  275.926199] test_bpf_obj_id:PASS:get-map-fd(next_id) 0 nsec
[  275.926205] 
[  275.932417] test_bpf_obj_id:PASS:get-map-fd(next_id) 0 nsec
[  275.932422] 
[  275.937351] test_bpf_obj_id:PASS:get-map-fd(next_id) 0 nsec
[  275.937356] 
[  275.942885] test_bpf_obj_id:PASS:get-map-fd(next_id) 0 nsec
[  275.942891] 
[  275.947970] test_bpf_obj_id:PASS:get-map-fd(next_id) 0 nsec
[  275.947975] 
[  275.953278] test_bpf_obj_id:PASS:get-map-fd(next_id) 0 nsec
[  275.953283] 
[  275.958715] test_bpf_obj_id:PASS:get-map-fd(next_id) 0 nsec
[  275.958720] 
[  275.963666] test_bpf_obj_id:PASS:get-map-fd(next_id) 0 nsec
[  275.963671] 
[  275.968511] test_bpf_obj_id:PASS:get-map-fd(next_id) 0 nsec
[  275.968516] 
[  275.973634] test_bpf_obj_id:PASS:get-map-fd(next_id) 0 nsec
[  275.973639] 
[  275.979036] test_bpf_obj_id:PASS:get-map-fd(next_id) 0 nsec
[  275.979041] 
[  275.984546] test_bpf_obj_id:PASS:check get-map-info(next_id->fd) 0 nsec
[  275.984551] 
[  275.990201] test_bpf_obj_id:PASS:get-map-fd(next_id) 0 nsec


To reproduce:

        git clone https://github.com/intel/lkp-tests.git
        cd lkp-tests
        bin/lkp qemu -k <bzImage> job-script  # job-script is attached in this email



Thanks,
Xiaolong

View attachment "config-4.15.0-rc8-01647-g8c417dc" of type "text/plain" (165216 bytes)

View attachment "job-script" of type "text/plain" (5477 bytes)

Download attachment "dmesg.xz" of type "application/x-xz" (32288 bytes)