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Date: Sat, 6 Feb 2021 22:02:47 +0800
From: kernel test robot <oliver.sang@...el.com>
To: schumaker.anna@...il.com
Cc: 0day robot <lkp@...el.com>, LKML <linux-kernel@...r.kernel.org>,
lkp@...ts.01.org, linux-nfs@...r.kernel.org,
Anna.Schumaker@...app.com
Subject: [sunrpc] 32fea9c254: WARNING:suspicious_RCU_usage
Greeting,
FYI, we noticed the following commit (built with gcc-9):
commit: 32fea9c254057ead4e72d284606137691c1a6be9 ("sunrpc: Create a per-rpc_clnt file for managing the destination IP address")
https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git schumaker-anna-gmail-com/SUNRPC-Create-sysfs-files-for-changing-IP/20210203-024737
in testcase: kernel-selftests
version: kernel-selftests-x86_64-b553cffa-1_20210122
with following parameters:
group: bpf
ucode: 0xde
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: 4 threads Intel(R) Core(TM) i7-7567U CPU @ 3.50GHz with 32G memory
caused below changes (please refer to attached dmesg/kmsg for entire log/backtrace):
If you fix the issue, kindly add following tag
Reported-by: kernel test robot <oliver.sang@...el.com>
kern :warn : [ 47.544562] WARNING: suspicious RCU usage
kern :warn : [ 47.545683] 5.11.0-rc6-00005-g32fea9c25405 #1 Not tainted
kern :warn : [ 47.546841] -----------------------------
kern :warn : [ 47.547898] net/sunrpc/sysfs.c:145 suspicious rcu_dereference_check() usage!
kern :warn : [ 47.549193]
other info that might help us debug this:
kern :warn : [ 47.551798]
rcu_scheduler_active = 2, debug_locks = 1
kern :warn : [ 47.553704] no locks held by mount.nfs/1093.
kern :warn : [ 47.554787]
stack backtrace:
kern :warn : [ 47.556504] CPU: 0 PID: 1093 Comm: mount.nfs Not tainted 5.11.0-rc6-00005-g32fea9c25405 #1
kern :warn : [ 47.557751] Hardware name: Intel Corporation NUC7i7BNH/NUC7i7BNB, BIOS BNKBL357.86A.0067.2018.0814.1500 08/14/2018
kern :warn : [ 47.559166] Call Trace:
kern :warn : [ 47.560018] dump_stack (kbuild/src/consumer/lib/dump_stack.c:122)
kern :warn : [ 47.560940] rpc_netns_sysfs_setup (kbuild/src/consumer/net/sunrpc/sysfs.c:145 (discriminator 8))
kern :warn : [ 47.561940] rpc_client_register (kbuild/src/consumer/net/sunrpc/clnt.c:306)
kern :warn : [ 47.562920] ? preempt_count_sub (kbuild/src/consumer/kernel/sched/core.c:4751 kbuild/src/consumer/kernel/sched/core.c:4748 kbuild/src/consumer/kernel/sched/core.c:4770)
kern :warn : [ 47.563890] rpc_new_client (kbuild/src/consumer/net/sunrpc/clnt.c:429)
kern :warn : [ 47.564837] rpc_create_xprt (kbuild/src/consumer/net/sunrpc/clnt.c:475)
kern :warn : [ 47.565772] ? rcu_read_lock_sched_held (kbuild/src/consumer/include/linux/lockdep.h:271 kbuild/src/consumer/kernel/rcu/update.c:123)
kern :warn : [ 47.566775] rpc_create (kbuild/src/consumer/net/sunrpc/clnt.c:596)
kern :warn : [ 47.567699] nfs_create_rpc_client (kbuild/src/consumer/fs/nfs/client.c:536)
kern :warn : [ 47.568666] nfs4_init_client (kbuild/src/consumer/fs/nfs/nfs4client.c:392) nfsv4
kern :warn : [ 47.569631] ? find_held_lock (kbuild/src/consumer/kernel/locking/lockdep.c:4935)
kern :warn : [ 47.570504] ? preempt_count_sub (kbuild/src/consumer/kernel/sched/core.c:4751 kbuild/src/consumer/kernel/sched/core.c:4748 kbuild/src/consumer/kernel/sched/core.c:4770)
kern :warn : [ 47.571354] ? _raw_spin_unlock (kbuild/src/consumer/arch/x86/include/asm/preempt.h:102 kbuild/src/consumer/include/linux/spinlock_api_smp.h:152 kbuild/src/consumer/kernel/locking/spinlock.c:183)
kern :warn : [ 47.572174] ? nfs_get_client (kbuild/src/consumer/fs/nfs/client.c:429)
kern :warn : [ 47.573007] nfs4_set_client (kbuild/src/consumer/fs/nfs/nfs4client.c:896) nfsv4
kern :warn : [ 47.573908] nfs4_create_server (kbuild/src/consumer/fs/nfs/nfs4client.c:1113 kbuild/src/consumer/fs/nfs/nfs4client.c:1161) nfsv4
kern :warn : [ 47.574834] nfs4_try_get_tree (kbuild/src/consumer/fs/nfs/nfs4super.c:226 (discriminator 3)) nfsv4
kern :warn : [ 47.575739] vfs_get_tree (kbuild/src/consumer/fs/super.c:1497)
kern :warn : [ 47.576547] path_mount (kbuild/src/consumer/fs/namespace.c:2881 kbuild/src/consumer/fs/namespace.c:3211)
kern :warn : [ 47.577375] do_mount (kbuild/src/consumer/fs/namespace.c:3224)
kern :warn : [ 47.578175] __x64_sys_mount (kbuild/src/consumer/fs/namespace.c:3434 kbuild/src/consumer/fs/namespace.c:3409 kbuild/src/consumer/fs/namespace.c:3409)
kern :warn : [ 47.579029] do_syscall_64 (kbuild/src/consumer/arch/x86/entry/common.c:46)
kern :warn : [ 47.579864] entry_SYSCALL_64_after_hwframe (kbuild/src/consumer/arch/x86/entry/entry_64.S:127)
kern :warn : [ 47.580825] RIP: 0033:0x7f07fdb14fea
kern :warn : [ 47.581675] Code: 48 8b 0d a9 0e 0c 00 f7 d8 64 89 01 48 83 c8 ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 49 89 ca b8 a5 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 8b 0d 76 0e 0c 00 f7 d8 64 89 01 48
All code
========
0: 48 8b 0d a9 0e 0c 00 mov 0xc0ea9(%rip),%rcx # 0xc0eb0
7: f7 d8 neg %eax
9: 64 89 01 mov %eax,%fs:(%rcx)
c: 48 83 c8 ff or $0xffffffffffffffff,%rax
10: c3 retq
11: 66 2e 0f 1f 84 00 00 nopw %cs:0x0(%rax,%rax,1)
18: 00 00 00
1b: 0f 1f 44 00 00 nopl 0x0(%rax,%rax,1)
20: 49 89 ca mov %rcx,%r10
23: b8 a5 00 00 00 mov $0xa5,%eax
28: 0f 05 syscall
2a:* 48 3d 01 f0 ff ff cmp $0xfffffffffffff001,%rax <-- trapping instruction
30: 73 01 jae 0x33
32: c3 retq
33: 48 8b 0d 76 0e 0c 00 mov 0xc0e76(%rip),%rcx # 0xc0eb0
3a: f7 d8 neg %eax
3c: 64 89 01 mov %eax,%fs:(%rcx)
3f: 48 rex.W
Code starting with the faulting instruction
===========================================
0: 48 3d 01 f0 ff ff cmp $0xfffffffffffff001,%rax
6: 73 01 jae 0x9
8: c3 retq
9: 48 8b 0d 76 0e 0c 00 mov 0xc0e76(%rip),%rcx # 0xc0e86
10: f7 d8 neg %eax
12: 64 89 01 mov %eax,%fs:(%rcx)
15: 48 rex.W
kern :warn : [ 47.583697] RSP: 002b:00007ffe5f04ce08 EFLAGS: 00000202 ORIG_RAX: 00000000000000a5
kern :warn : [ 47.584949] RAX: ffffffffffffffda RBX: 00007ffe5f04cf60 RCX: 00007f07fdb14fea
kern :warn : [ 47.586176] RDX: 0000561964d17b50 RSI: 0000561964d17b70 RDI: 0000561964d19880
kern :warn : [ 47.587428] RBP: 0000000000000000 R08: 0000561964d1a370 R09: 0000561964d1a960
kern :warn : [ 47.588672] R10: 0000000000000000 R11: 0000000000000202 R12: 00007ffe5f04cf60
kern :warn : [ 47.589935] R13: 0000561964d1a160 R14: 0000000000000010 R15: 00007ffe5f04ce70
user :notice: [ 49.609026] result_service: raw_upload, RESULT_MNT: /internal-lkp-server/result, RESULT_ROOT: /internal-lkp-server/result/kernel-selftests/bpf-ucode=0xde/lkp-kbl-nuc1/debian-10.4-x86_64-20200603.cgz/x86_64-rhel-7.6-kselftests/gcc-9/32fea9c254057ead4e72d284606137691c1a6be9/3, TMP_RESULT_ROOT: /tmp/lkp/result
user :notice: [ 49.618503] run-job /lkp/jobs/scheduled/lkp-kbl-nuc1/kernel-selftests-bpf-ucode=0xde-debian-10.4-x86_64-20200603.cgz-32fea9c254057ead4e72d284606137691c1a6be9-20210205-26302-nm88l6-1.yaml
user :notice: [ 50.635273] /usr/bin/wget -q --timeout=1800 --tries=1 --local-encoding=UTF-8 http://internal-lkp-server:80/~lkp/cgi-bin/lkp-jobfile-append-var?job_file=/lkp/jobs/scheduled/lkp-kbl-nuc1/kernel-selftests-bpf-ucode=0xde-debian-10.4-x86_64-20200603.cgz-32fea9c254057ead4e72d284606137691c1a6be9-20210205-26302-nm88l6-1.yaml&job_state=running -O /dev/null
user :notice: [ 50.644410] target ucode: 0xde
user :notice: [ 50.650623] current_version: de, target_version: de
user :notice: [ 50.660463] KERNEL SELFTESTS: linux_headers_dir is /usr/src/linux-headers-x86_64-rhel-7.6-kselftests-32fea9c254057ead4e72d284606137691c1a6be9
user :notice: [ 76.684421] 2021-02-04 18:59:05 mount --bind /lib/modules/5.11.0-rc6-00005-g32fea9c25405/kernel/lib /usr/src/perf_selftests-x86_64-rhel-7.6-kselftests-32fea9c254057ead4e72d284606137691c1a6be9/lib
user :notice: [ 76.754555] 2021-02-04 18:59:05 sed -i s/default_timeout=45/default_timeout=300/ kselftest/runner.sh
user :notice: [ 76.975437] LKP WARN miss config CONFIG_IMA_WRITE_POLICY= of bpf/config
user :notice: [ 77.008287] 2021-02-04 18:59:05 make -C ../../../tools/bpf/bpftool
user :notice: [ 77.019128] make: Entering directory '/usr/src/perf_selftests-x86_64-rhel-7.6-kselftests-32fea9c254057ead4e72d284606137691c1a6be9/tools/bpf/bpftool'
user :err : [ 77.346735] 4666484 blocks
user :notice: [ 78.561427] Auto-detecting system features:
user :notice: [ 78.569098] ... libbfd: [ .[32mon.[m ]
user :notice: [ 78.576912] ... disassembler-four-args: [ .[32mon.[m ]
user :notice: [ 78.584519] ... zlib: [ .[32mon.[m ]
user :notice: [ 78.591819] ... libcap: [ .[32mon.[m ]
user :notice: [ 78.598528] ... clang-bpf-co-re: [ .[32mon.[m ]
user :notice: [ 78.608916] CC map_perf_ring.o
user :notice: [ 78.726217] CC xlated_dumper.o
user :notice: [ 78.882817] CC iter.o
user :notice: [ 78.979333] CC btf.o
user :notice: [ 79.247725] CC tracelog.o
user :notice: [ 79.360871] CC link.o
user :notice: [ 79.536619] CC perf.o
user :notice: [ 79.664580] MKDIR /usr/src/perf_selftests-x86_64-rhel-7.6-kselftests-32fea9c254057ead4e72d284606137691c1a6be9/tools/bpf/bpftool/bootstrap/
user :notice: [ 79.675765] CC /usr/src/perf_selftests-x86_64-rhel-7.6-kselftests-32fea9c254057ead4e72d284606137691c1a6be9/tools/bpf/bpftool/bootstrap/main.o
user :notice: [ 79.833576] CC /usr/src/perf_selftests-x86_64-rhel-7.6-kselftests-32fea9c254057ead4e72d284606137691c1a6be9/tools/bpf/bpftool/bootstrap/common.o
user :notice: [ 80.096833] CC /usr/src/perf_selftests-x86_64-rhel-7.6-kselftests-32fea9c254057ead4e72d284606137691c1a6be9/tools/bpf/bpftool/bootstrap/json_writer.o
user :notice: [ 80.199371] CC /usr/src/perf_selftests-x86_64-rhel-7.6-kselftests-32fea9c254057ead4e72d284606137691c1a6be9/tools/bpf/bpftool/bootstrap/gen.o
user :notice: [ 80.385777] CC /usr/src/perf_selftests-x86_64-rhel-7.6-kselftests-32fea9c254057ead4e72d284606137691c1a6be9/tools/bpf/bpftool/bootstrap/btf.o
user :notice: [ 80.656214] MKDIR /usr/src/perf_selftests-x86_64-rhel-7.6-kselftests-32fea9c254057ead4e72d284606137691c1a6be9/tools/bpf/bpftool/bootstrap/libbpf/
user :notice: [ 80.671984] make[1]: Entering directory '/usr/src/perf_selftests-x86_64-rhel-7.6-kselftests-32fea9c254057ead4e72d284606137691c1a6be9/tools/lib/bpf'
user :notice: [ 81.134178] Auto-detecting system features:
user :notice: [ 81.141337] ... libelf: [ .[32mon.[m ]
To reproduce:
git clone https://github.com/intel/lkp-tests.git
cd lkp-tests
bin/lkp install job.yaml # job file is attached in this email
bin/lkp split-job --compatible job.yaml
bin/lkp run compatible-job.yaml
Thanks,
Oliver Sang
View attachment "config-5.11.0-rc6-00005-g32fea9c25405" of type "text/plain" (212614 bytes)
View attachment "job-script" of type "text/plain" (7190 bytes)
Download attachment "kmsg.xz" of type "application/x-xz" (33752 bytes)
View attachment "kernel-selftests" of type "text/plain" (71448 bytes)
View attachment "job.yaml" of type "text/plain" (6204 bytes)
View attachment "reproduce" of type "text/plain" (334 bytes)
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