From: syzbot <syzbot+3ba0493d523d007b3819@syzkaller.appspotmail.com>
To: hdanton@sina.com, linux-kernel@vger.kernel.org,
syzkaller-bugs@googlegroups.com
Subject: Re: [syzbot] INFO: rcu detected stall in net_tx_action
Date: Wed, 27 Jul 2022 17:27:07 -0700 [thread overview]
Message-ID: <000000000000ffbf5205e4d297e0@google.com> (raw)
In-Reply-To: <20220728001258.311-1-hdanton@sina.com>
Hello,
syzbot has tested the proposed patch but the reproducer is still triggering an issue:
INFO: rcu detected stall in tc_modify_qdisc
rcu: INFO: rcu_preempt self-detected stall on CPU
rcu: 1-...!: (11 ticks this GP) idle=1ba/1/0x4000000000000000 softirq=8504/8504 fqs=0
(t=13199 jiffies g=9753 q=157)
rcu: rcu_preempt kthread timer wakeup didn't happen for 13198 jiffies! g9753 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x402
rcu: Possible timer handling issue on cpu=1 timer-softirq=2661
rcu: rcu_preempt kthread starved for 13199 jiffies! g9753 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x402 ->cpu=1
rcu: Unless rcu_preempt kthread gets sufficient CPU time, OOM is now expected behavior.
rcu: RCU grace-period kthread stack dump:
task:rcu_preempt state:I stack:29480 pid: 14 ppid: 2 flags:0x00004000
Call Trace:
context_switch kernel/sched/core.c:4339 [inline]
__schedule+0x916/0x23e0 kernel/sched/core.c:5147
schedule+0xcf/0x270 kernel/sched/core.c:5226
schedule_timeout+0x14a/0x250 kernel/time/timer.c:1892
rcu_gp_fqs_loop kernel/rcu/tree.c:2004 [inline]
rcu_gp_kthread+0xd07/0x2300 kernel/rcu/tree.c:2177
kthread+0x3b1/0x4a0 kernel/kthread.c:313
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:294
rcu: Stack dump where RCU GP kthread last ran:
NMI backtrace for cpu 1
CPU: 1 PID: 5948 Comm: syz-executor.0 Not tainted 5.13.0-rc6-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/29/2022
Call Trace:
<IRQ>
__dump_stack lib/dump_stack.c:79 [inline]
dump_stack+0x141/0x1d7 lib/dump_stack.c:120
nmi_cpu_backtrace.cold+0x44/0xd7 lib/nmi_backtrace.c:105
nmi_trigger_cpumask_backtrace+0x1b3/0x230 lib/nmi_backtrace.c:62
trigger_single_cpu_backtrace include/linux/nmi.h:164 [inline]
rcu_check_gp_kthread_starvation.cold+0x1cc/0x1d1 kernel/rcu/tree_stall.h:480
print_cpu_stall kernel/rcu/tree_stall.h:624 [inline]
check_cpu_stall kernel/rcu/tree_stall.h:701 [inline]
rcu_pending kernel/rcu/tree.c:3911 [inline]
rcu_sched_clock_irq.cold+0x9a/0x747 kernel/rcu/tree.c:2649
update_process_times+0x16d/0x200 kernel/time/timer.c:1796
tick_sched_handle+0x9b/0x180 kernel/time/tick-sched.c:226
tick_sched_timer+0x1b0/0x2d0 kernel/time/tick-sched.c:1374
__run_hrtimer kernel/time/hrtimer.c:1537 [inline]
__hrtimer_run_queues+0x1c0/0xe40 kernel/time/hrtimer.c:1601
hrtimer_interrupt+0x330/0xa00 kernel/time/hrtimer.c:1663
local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1089 [inline]
__sysvec_apic_timer_interrupt+0x146/0x540 arch/x86/kernel/apic/apic.c:1106
sysvec_apic_timer_interrupt+0x8e/0xc0 arch/x86/kernel/apic/apic.c:1100
</IRQ>
asm_sysvec_apic_timer_interrupt+0x12/0x20 arch/x86/include/asm/idtentry.h:647
RIP: 0010:check_kcov_mode kernel/kcov.c:163 [inline]
RIP: 0010:__sanitizer_cov_trace_pc+0x7/0x60 kernel/kcov.c:197
Code: ff ff b9 ff ff ff ff ba 08 00 00 00 4d 8b 03 48 0f bd ca 49 8b 45 00 48 63 c9 e9 64 ff ff ff 0f 1f 40 00 65 8b 05 59 15 8d 7e <89> c1 48 8b 34 24 81 e1 00 01 00 00 65 48 8b 14 25 00 f0 01 00 a9
RSP: 0018:ffffc900018af270 EFLAGS: 00000202
RAX: 0000000000000201 RBX: ffff8880157ca340 RCX: 0000000000000000
RDX: 0000000000000202 RSI: 0000000000000202 RDI: 0000000000000001
RBP: ffff8880b9c26580 R08: 0000000000000001 R09: ffffffff8fa2895f
R10: 0000000000000001 R11: 0000000000000000 R12: 00000000ffffffff
R13: 0000000000000246 R14: ffff8880b9c26580 R15: dffffc0000000000
hrtimer_try_to_cancel+0x36/0x1e0 kernel/time/hrtimer.c:1180
hrtimer_cancel+0x13/0x40 kernel/time/hrtimer.c:1295
taprio_reset+0x72/0x280 net/sched/sch_taprio.c:1656
qdisc_reset+0xdb/0x730 net/sched/sch_generic.c:951
dev_reset_queue+0x92/0x120 net/sched/sch_generic.c:1202
netdev_for_each_tx_queue include/linux/netdevice.h:2337 [inline]
dev_deactivate_many+0x551/0xc30 net/sched/sch_generic.c:1267
dev_deactivate+0xe9/0x1b0 net/sched/sch_generic.c:1290
qdisc_graft+0xdc1/0x1260 net/sched/sch_api.c:1055
tc_modify_qdisc+0xb5a/0x1a50 net/sched/sch_api.c:1674
rtnetlink_rcv_msg+0x44e/0xad0 net/core/rtnetlink.c:5566
netlink_rcv_skb+0x153/0x420 net/netlink/af_netlink.c:2504
netlink_unicast_kernel net/netlink/af_netlink.c:1314 [inline]
netlink_unicast+0x533/0x7d0 net/netlink/af_netlink.c:1340
netlink_sendmsg+0x856/0xd90 net/netlink/af_netlink.c:1929
sock_sendmsg_nosec net/socket.c:654 [inline]
sock_sendmsg+0xcf/0x120 net/socket.c:674
____sys_sendmsg+0x6e8/0x810 net/socket.c:2337
___sys_sendmsg+0xf3/0x170 net/socket.c:2391
__sys_sendmsg+0xe5/0x1b0 net/socket.c:2420
do_syscall_64+0x3a/0xb0 arch/x86/entry/common.c:47
entry_SYSCALL_64_after_hwframe+0x44/0xae
RIP: 0033:0x4665d9
Code: ff ff 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 73 01 c3 48 c7 c1 bc ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f74e9479188 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
RAX: ffffffffffffffda RBX: 000000000056bf80 RCX: 00000000004665d9
RDX: 0000000000000000 RSI: 00000000200007c0 RDI: 0000000000000004
RBP: 00000000004bfcb9 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 000000000056bf80
R13: 00007ffe32f717ef R14: 00007f74e9479300 R15: 0000000000022000
NMI backtrace for cpu 1
CPU: 1 PID: 5948 Comm: syz-executor.0 Not tainted 5.13.0-rc6-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/29/2022
Call Trace:
<IRQ>
__dump_stack lib/dump_stack.c:79 [inline]
dump_stack+0x141/0x1d7 lib/dump_stack.c:120
nmi_cpu_backtrace.cold+0x44/0xd7 lib/nmi_backtrace.c:105
nmi_trigger_cpumask_backtrace+0x1b3/0x230 lib/nmi_backtrace.c:62
trigger_single_cpu_backtrace include/linux/nmi.h:164 [inline]
rcu_dump_cpu_stacks+0x25e/0x3f0 kernel/rcu/tree_stall.h:343
print_cpu_stall kernel/rcu/tree_stall.h:626 [inline]
check_cpu_stall kernel/rcu/tree_stall.h:701 [inline]
rcu_pending kernel/rcu/tree.c:3911 [inline]
rcu_sched_clock_irq.cold+0x9f/0x747 kernel/rcu/tree.c:2649
update_process_times+0x16d/0x200 kernel/time/timer.c:1796
tick_sched_handle+0x9b/0x180 kernel/time/tick-sched.c:226
tick_sched_timer+0x1b0/0x2d0 kernel/time/tick-sched.c:1374
__run_hrtimer kernel/time/hrtimer.c:1537 [inline]
__hrtimer_run_queues+0x1c0/0xe40 kernel/time/hrtimer.c:1601
hrtimer_interrupt+0x330/0xa00 kernel/time/hrtimer.c:1663
local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1089 [inline]
__sysvec_apic_timer_interrupt+0x146/0x540 arch/x86/kernel/apic/apic.c:1106
sysvec_apic_timer_interrupt+0x8e/0xc0 arch/x86/kernel/apic/apic.c:1100
</IRQ>
asm_sysvec_apic_timer_interrupt+0x12/0x20 arch/x86/include/asm/idtentry.h:647
RIP: 0010:check_kcov_mode kernel/kcov.c:163 [inline]
RIP: 0010:__sanitizer_cov_trace_pc+0x7/0x60 kernel/kcov.c:197
Code: ff ff b9 ff ff ff ff ba 08 00 00 00 4d 8b 03 48 0f bd ca 49 8b 45 00 48 63 c9 e9 64 ff ff ff 0f 1f 40 00 65 8b 05 59 15 8d 7e <89> c1 48 8b 34 24 81 e1 00 01 00 00 65 48 8b 14 25 00 f0 01 00 a9
RSP: 0018:ffffc900018af270 EFLAGS: 00000202
RAX: 0000000000000201 RBX: ffff8880157ca340 RCX: 0000000000000000
RDX: 0000000000000202 RSI: 0000000000000202 RDI: 0000000000000001
RBP: ffff8880b9c26580 R08: 0000000000000001 R09: ffffffff8fa2895f
R10: 0000000000000001 R11: 0000000000000000 R12: 00000000ffffffff
R13: 0000000000000246 R14: ffff8880b9c26580 R15: dffffc0000000000
hrtimer_try_to_cancel+0x36/0x1e0 kernel/time/hrtimer.c:1180
hrtimer_cancel+0x13/0x40 kernel/time/hrtimer.c:1295
taprio_reset+0x72/0x280 net/sched/sch_taprio.c:1656
qdisc_reset+0xdb/0x730 net/sched/sch_generic.c:951
dev_reset_queue+0x92/0x120 net/sched/sch_generic.c:1202
netdev_for_each_tx_queue include/linux/netdevice.h:2337 [inline]
dev_deactivate_many+0x551/0xc30 net/sched/sch_generic.c:1267
dev_deactivate+0xe9/0x1b0 net/sched/sch_generic.c:1290
qdisc_graft+0xdc1/0x1260 net/sched/sch_api.c:1055
tc_modify_qdisc+0xb5a/0x1a50 net/sched/sch_api.c:1674
rtnetlink_rcv_msg+0x44e/0xad0 net/core/rtnetlink.c:5566
netlink_rcv_skb+0x153/0x420 net/netlink/af_netlink.c:2504
netlink_unicast_kernel net/netlink/af_netlink.c:1314 [inline]
netlink_unicast+0x533/0x7d0 net/netlink/af_netlink.c:1340
netlink_sendmsg+0x856/0xd90 net/netlink/af_netlink.c:1929
sock_sendmsg_nosec net/socket.c:654 [inline]
sock_sendmsg+0xcf/0x120 net/socket.c:674
____sys_sendmsg+0x6e8/0x810 net/socket.c:2337
___sys_sendmsg+0xf3/0x170 net/socket.c:2391
__sys_sendmsg+0xe5/0x1b0 net/socket.c:2420
do_syscall_64+0x3a/0xb0 arch/x86/entry/common.c:47
entry_SYSCALL_64_after_hwframe+0x44/0xae
RIP: 0033:0x4665d9
Code: ff ff 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 73 01 c3 48 c7 c1 bc ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f74e9479188 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
RAX: ffffffffffffffda RBX: 000000000056bf80 RCX: 00000000004665d9
RDX: 0000000000000000 RSI: 00000000200007c0 RDI: 0000000000000004
RBP: 00000000004bfcb9 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 000000000056bf80
R13: 00007ffe32f717ef R14: 00007f74e9479300 R15: 0000000000022000
Tested on:
commit: d6765985 Revert "be2net: disable bh with spin_lock in ..
git tree: https://git.kernel.org/pub/scm/linux/kernel/git/netdev/net.git
console output: https://syzkaller.appspot.com/x/log.txt?x=174b2102080000
kernel config: https://syzkaller.appspot.com/x/.config?x=1d43f3e8616689bf
dashboard link: https://syzkaller.appspot.com/bug?extid=3ba0493d523d007b3819
compiler: gcc (Debian 10.2.1-6) 10.2.1 20210110, GNU ld (GNU Binutils for Debian) 2.35.2
patch: https://syzkaller.appspot.com/x/patch.diff?x=1648beee080000
next parent reply other threads:[~2022-07-28 0:27 UTC|newest]
Thread overview: 17+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <20220728001258.311-1-hdanton@sina.com>
2022-07-28 0:27 ` syzbot [this message]
[not found] <20220731020212.1439-1-hdanton@sina.com>
2022-07-31 2:21 ` [syzbot] INFO: rcu detected stall in net_tx_action syzbot
[not found] <20220730223316.1270-1-hdanton@sina.com>
2022-07-30 22:44 ` syzbot
[not found] <20220730114424.1197-1-hdanton@sina.com>
2022-07-30 15:29 ` syzbot
[not found] <20220730094728.1144-1-hdanton@sina.com>
2022-07-30 11:16 ` syzbot
[not found] <20220728095628.903-1-hdanton@sina.com>
2022-07-28 10:16 ` syzbot
[not found] <20220728081331.805-1-hdanton@sina.com>
2022-07-28 8:34 ` syzbot
[not found] <20220728073322.731-1-hdanton@sina.com>
2022-07-28 7:46 ` syzbot
[not found] <20220728042901.668-1-hdanton@sina.com>
2022-07-28 4:49 ` syzbot
[not found] <20220728032630.611-1-hdanton@sina.com>
2022-07-28 3:44 ` syzbot
[not found] <20220728024623.492-1-hdanton@sina.com>
2022-07-28 2:59 ` syzbot
[not found] <20220727132847.227-1-hdanton@sina.com>
2022-07-27 13:44 ` syzbot
[not found] <20220727130039.287-1-hdanton@sina.com>
2022-07-27 13:16 ` syzbot
[not found] <20220727120100.2928-1-hdanton@sina.com>
2022-07-27 12:14 ` syzbot
2021-07-01 15:50 syzbot
2022-07-26 15:50 ` syzbot
2022-07-27 16:00 ` Ming Lei
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