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Date: Sun, 7 Feb 2021 11:03:30 +0800
From: kernel test robot <oliver.sang@...el.com>
To: Dongli Zhang <dongli.zhang@...cle.com>
Cc: "Michael S. Tsirkin" <mst@...hat.com>, Eli Cohen <elic@...dia.com>,
Jason Wang <jasowang@...hat.com>,
LKML <linux-kernel@...r.kernel.org>, lkp@...ts.01.org,
lkp@...el.com, virtualization@...ts.linux-foundation.org,
kvm@...r.kernel.org, netdev@...r.kernel.org, pbonzini@...hat.com,
stefanha@...hat.com, joe.jin@...cle.com,
aruna.ramakrishna@...cle.com
Subject: [vdpa_sim_net] 79991caf52:
net/ipv4/ipmr.c:#RCU-list_traversed_in_non-reader_section
Greeting,
FYI, we noticed the following commit (built with gcc-9):
commit: 79991caf5202c7989928be534727805f8f68bb8d ("vdpa_sim_net: Add support for user supported devices")
https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git Dongli-Zhang/vhost-scsi-alloc-vhost_scsi-with-kvzalloc-to-avoid-delay/20210129-191605
in testcase: trinity
version: trinity-static-x86_64-x86_64-f93256fb_2019-08-28
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-x86_64 -enable-kvm -cpu SandyBridge -smp 2 -m 8G
caused below changes (please refer to attached dmesg/kmsg for entire log/backtrace):
+-------------------------------------------------------------------------+------------+------------+
| | 39502d042a | 79991caf52 |
+-------------------------------------------------------------------------+------------+------------+
| boot_successes | 0 | 0 |
| boot_failures | 62 | 57 |
| WARNING:suspicious_RCU_usage | 62 | 57 |
| security/smack/smack_lsm.c:#RCU-list_traversed_in_non-reader_section | 62 | 57 |
| security/smack/smack_access.c:#RCU-list_traversed_in_non-reader_section | 62 | 57 |
| BUG:workqueue_lockup-pool | 33 | 40 |
| BUG:kernel_hang_in_boot_stage | 6 | 2 |
| net/mac80211/util.c:#RCU-list_traversed_in_non-reader_section | 23 | 15 |
| WARNING:SOFTIRQ-safe->SOFTIRQ-unsafe_lock_order_detected | 18 | |
| WARNING:inconsistent_lock_state | 5 | |
| inconsistent{SOFTIRQ-ON-W}->{IN-SOFTIRQ-W}usage | 5 | |
| calltrace:asm_call_irq_on_stack | 2 | |
| RIP:lock_acquire | 2 | |
| RIP:check_kcov_mode | 1 | |
| RIP:native_safe_halt | 2 | |
| INFO:rcu_sched_self-detected_stall_on_CPU | 2 | |
| RIP:clear_page_rep | 1 | |
| WARNING:at_drivers/gpu/drm/vkms/vkms_crtc.c:#vkms_vblank_simulate | 9 | 7 |
| RIP:vkms_vblank_simulate | 9 | 7 |
| RIP:__slab_alloc | 3 | 3 |
| RIP:__do_softirq | 2 | |
| RIP:console_unlock | 6 | 3 |
| invoked_oom-killer:gfp_mask=0x | 1 | |
| Mem-Info | 1 | |
| RIP:vprintk_emit | 1 | |
| RIP:__asan_load4 | 1 | |
| kernel_BUG_at_kernel/sched/core.c | 0 | 1 |
| invalid_opcode:#[##] | 0 | 1 |
| RIP:sched_cpu_dying | 0 | 1 |
| WARNING:possible_circular_locking_dependency_detected | 0 | 1 |
| Kernel_panic-not_syncing:Fatal_exception | 0 | 1 |
| net/ipv4/ipmr.c:#RCU-list_traversed_in_non-reader_section | 0 | 8 |
| RIP:arch_local_irq_restore | 0 | 1 |
| RIP:idr_get_free | 0 | 1 |
| net/ipv6/ip6mr.c:#RCU-list_traversed_in_non-reader_section | 0 | 2 |
+-------------------------------------------------------------------------+------------+------------+
If you fix the issue, kindly add following tag
Reported-by: kernel test robot <oliver.sang@...el.com>
[ 890.196279] =============================
[ 890.212608] WARNING: suspicious RCU usage
[ 890.228281] 5.11.0-rc4-00008-g79991caf5202 #1 Tainted: G W
[ 890.244087] -----------------------------
[ 890.259417] net/ipv4/ipmr.c:138 RCU-list traversed in non-reader section!!
[ 890.275043]
[ 890.275043] other info that might help us debug this:
[ 890.275043]
[ 890.318497]
[ 890.318497] rcu_scheduler_active = 2, debug_locks = 1
[ 890.346089] 2 locks held by trinity-c1/2476:
[ 890.360897] #0: ffff888149d6f400 (&f->f_pos_lock){+.+.}-{3:3}, at: __fdget_pos+0xc0/0xe0
[ 890.375165] #1: ffff8881cabfd5c8 (&p->lock){+.+.}-{3:3}, at: seq_read_iter+0xa0/0x9c0
[ 890.389706]
[ 890.389706] stack backtrace:
[ 890.416375] CPU: 1 PID: 2476 Comm: trinity-c1 Tainted: G W 5.11.0-rc4-00008-g79991caf5202 #1
[ 890.430706] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014
[ 890.444971] Call Trace:
[ 890.458554] dump_stack+0x15f/0x1bf
[ 890.471996] ipmr_get_table+0x140/0x160
[ 890.485328] ipmr_vif_seq_start+0x4d/0xe0
[ 890.498620] seq_read_iter+0x1b2/0x9c0
[ 890.511469] ? kvm_sched_clock_read+0x14/0x40
[ 890.524008] ? sched_clock+0x1b/0x40
[ 890.536095] ? iov_iter_init+0x7c/0xa0
[ 890.548028] seq_read+0x2fd/0x3e0
[ 890.559948] ? seq_hlist_next_percpu+0x140/0x140
[ 890.572204] ? should_fail+0x78/0x2a0
[ 890.584189] ? write_comp_data+0x2a/0xa0
[ 890.596235] ? __sanitizer_cov_trace_pc+0x1d/0x60
[ 890.608134] ? seq_hlist_next_percpu+0x140/0x140
[ 890.620042] proc_reg_read+0x14e/0x180
[ 890.631585] do_iter_read+0x397/0x420
[ 890.642843] vfs_readv+0xf5/0x160
[ 890.653833] ? vfs_iter_read+0x80/0x80
[ 890.664229] ? __fdget_pos+0xc0/0xe0
[ 890.674236] ? pvclock_clocksource_read+0xd9/0x1a0
[ 890.684259] ? kvm_sched_clock_read+0x14/0x40
[ 890.693852] ? sched_clock+0x1b/0x40
[ 890.702898] ? sched_clock_cpu+0x18/0x120
[ 890.711648] ? write_comp_data+0x2a/0xa0
[ 890.720243] ? __sanitizer_cov_trace_pc+0x1d/0x60
[ 890.729290] do_readv+0x111/0x260
[ 890.738205] ? vfs_readv+0x160/0x160
[ 890.747154] ? lockdep_hardirqs_on+0x77/0x100
[ 890.756100] ? syscall_enter_from_user_mode+0x8a/0x100
[ 890.765126] do_syscall_64+0x34/0x80
[ 890.773795] entry_SYSCALL_64_after_hwframe+0x44/0xa9
[ 890.782630] RIP: 0033:0x453b29
[ 890.791189] Code: 00 f3 c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 0f 83 3b 84 00 00 c3 66 2e 0f 1f 84 00 00 00 00
[ 890.810866] RSP: 002b:00007ffcda44fb18 EFLAGS: 00000246 ORIG_RAX: 0000000000000013
[ 890.820764] RAX: ffffffffffffffda RBX: 0000000000000013 RCX: 0000000000453b29
[ 890.830792] RDX: 000000000000009a RSI: 0000000001de1c00 RDI: 00000000000000b9
[ 890.840626] RBP: 00007ffcda44fbc0 R08: 722c279d69ffc468 R09: 0000000000000400
[ 890.850366] R10: 0098d82a42c63c22 R11: 0000000000000246 R12: 0000000000000002
[ 890.860001] R13: 00007f042ae6f058 R14: 00000000010a2830 R15: 00007f042ae6f000
To reproduce:
# build kernel
cd linux
cp config-5.11.0-rc4-00008-g79991caf5202 .config
make HOSTCC=gcc-9 CC=gcc-9 ARCH=x86_64 olddefconfig prepare modules_prepare bzImage
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,
Oliver Sang
View attachment "config-5.11.0-rc4-00008-g79991caf5202" of type "text/plain" (268160 bytes)
View attachment "job-script" of type "text/plain" (4235 bytes)
Download attachment "dmesg.xz" of type "application/x-xz" (53340 bytes)
View attachment "trinity" of type "text/plain" (2094 bytes)
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