INFO: rcu detected stall in inet_stream_connect
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syzbot
Mar 12, 2019, 9:52:05 AM3/12/19
to syzkaller-upst...@googlegroups.com
Hello,
syzbot found the following crash on:
HEAD commit: 41af8b3a net: lio_core: fix two NULL pointer dereferences
git tree: net
console output: https://syzkaller.appspot.com/x/log.txt?x=137e3b13200000
kernel config: https://syzkaller.appspot.com/x/.config?x=73d88a42238825ad
dashboard link: https://syzkaller.appspot.com/bug?extid=090ba3ae3deee6a4b1cc
compiler: gcc (GCC) 9.0.0 20181231 (experimental)
userspace arch: amd64
CC: [core...@netfilter.org da...@davemloft.net f...@strlen.de
kad...@blackhole.kfki.hu linux-...@vger.kernel.org
net...@vger.kernel.org netfilt...@vger.kernel.org pa...@netfilter.org
net...@vger.kernel.org]
Unfortunately, I don't have any reproducer for this crash yet.
IMPORTANT: if you fix the bug, please add the following tag to the commit:
Reported-by: syzbot+090ba3...@syzkaller.appspotmail.com
rcu: INFO: rcu_preempt self-detected stall on CPU
rcu: 0-...!: (10501 ticks this GP) idle=18e/1/0x4000000000000002
softirq=18876/18876 fqs=0
rcu: (t=10502 jiffies g=15117 q=1029)
rcu: rcu_preempt kthread starved for 10503 jiffies! g15117 f0x0
RCU_GP_WAIT_FQS(5) ->state=0x402 ->cpu=0
rcu: RCU grace-period kthread stack dump:
rcu_preempt I29024 10 2 0x80000000
Call Trace:
context_switch kernel/sched/core.c:2844 [inline]
__schedule+0x817/0x1cc0 kernel/sched/core.c:3485
schedule+0x92/0x180 kernel/sched/core.c:3529
schedule_timeout+0x4db/0xfd0 kernel/time/timer.c:1803
rcu_gp_fqs_loop kernel/rcu/tree.c:1948 [inline]
rcu_gp_kthread+0x956/0x17a0 kernel/rcu/tree.c:2105
kthread+0x357/0x430 kernel/kthread.c:246
ret_from_fork+0x3a/0x50 arch/x86/entry/entry_64.S:352
NMI backtrace for cpu 0
CPU: 0 PID: 9825 Comm: syz-executor.4 Not tainted 5.0.0+ #118
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS
Google 01/01/2011
Call Trace:
<IRQ>
__dump_stack lib/dump_stack.c:77 [inline]
dump_stack+0x172/0x1f0 lib/dump_stack.c:113
nmi_cpu_backtrace.cold+0x63/0xa4 lib/nmi_backtrace.c:101
nmi_trigger_cpumask_backtrace+0x1be/0x236 lib/nmi_backtrace.c:62
arch_trigger_cpumask_backtrace+0x14/0x20 arch/x86/kernel/apic/hw_nmi.c:38
trigger_single_cpu_backtrace include/linux/nmi.h:164 [inline]
rcu_dump_cpu_stacks+0x183/0x1cf kernel/rcu/tree.c:1211
print_cpu_stall kernel/rcu/tree.c:1348 [inline]
check_cpu_stall kernel/rcu/tree.c:1422 [inline]
rcu_pending kernel/rcu/tree.c:3018 [inline]
rcu_check_callbacks.cold+0x500/0xa4a kernel/rcu/tree.c:2521
update_process_times+0x32/0x80 kernel/time/timer.c:1635
tick_sched_handle+0xa2/0x190 kernel/time/tick-sched.c:161
tick_sched_timer+0x47/0x130 kernel/time/tick-sched.c:1271
__run_hrtimer kernel/time/hrtimer.c:1389 [inline]
__hrtimer_run_queues+0x33e/0xde0 kernel/time/hrtimer.c:1451
hrtimer_interrupt+0x314/0x770 kernel/time/hrtimer.c:1509
local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1035 [inline]
smp_apic_timer_interrupt+0x120/0x570 arch/x86/kernel/apic/apic.c:1060
apic_timer_interrupt+0xf/0x20 arch/x86/entry/entry_64.S:807
</IRQ>
RIP: 0010:cpu_relax arch/x86/include/asm/processor.h:666 [inline]
RIP: 0010:virt_spin_lock arch/x86/include/asm/qspinlock.h:84 [inline]
RIP: 0010:native_queued_spin_lock_slowpath+0x132/0x970
kernel/locking/qspinlock.c:337
Code: 00 00 00 48 8b 45 d0 65 48 33 04 25 28 00 00 00 0f 85 a2 06 00 00 48
81 c4 98 00 00 00 5b 41 5c 41 5d 41 5e 41 5f 5d c3 f3 90 <e9> 73 ff ff ff
8b 45 98 4c 8d 65 d8 3d 00 01 00 00 0f 84 e5 00 00
RSP: 0018:ffff8880694ef090 EFLAGS: 00000202 ORIG_RAX: ffffffffffffff13
RAX: 0000000000000000 RBX: ffffe8ffffc75060 RCX: ffffffff81579127
RDX: 0000000000000000 RSI: 0000000000000004 RDI: ffffe8ffffc75060
RBP: ffff8880694ef150 R08: 1ffffd1ffff8ea0c R09: fffff91ffff8ea0d
R10: fffff91ffff8ea0c R11: ffffe8ffffc75063 R12: 0000000000000001
R13: 0000000000000003 R14: fffff91ffff8ea0c R15: 000000000000000b
pv_queued_spin_lock_slowpath arch/x86/include/asm/paravirt.h:653 [inline]
queued_spin_lock_slowpath arch/x86/include/asm/qspinlock.h:50 [inline]
queued_spin_lock include/asm-generic/qspinlock.h:90 [inline]
do_raw_spin_lock+0x20e/0x2e0 kernel/locking/spinlock_debug.c:113
__raw_spin_lock include/linux/spinlock_api_smp.h:143 [inline]
_raw_spin_lock+0x37/0x40 kernel/locking/spinlock.c:144
spin_lock include/linux/spinlock.h:329 [inline]
nf_ct_add_to_unconfirmed_list net/netfilter/nf_conntrack_core.c:487
[inline]
init_conntrack.isra.0+0xa07/0x1170 net/netfilter/nf_conntrack_core.c:1478
resolve_normal_ct net/netfilter/nf_conntrack_core.c:1519 [inline]
nf_conntrack_in+0xd93/0x1410 net/netfilter/nf_conntrack_core.c:1679
ipv6_conntrack_local+0x1e/0x30 net/netfilter/nf_conntrack_proto.c:194
nf_hook_entry_hookfn include/linux/netfilter.h:119 [inline]
nf_hook_slow+0xbf/0x1f0 net/netfilter/core.c:511
nf_hook include/linux/netfilter.h:244 [inline]
NF_HOOK include/linux/netfilter.h:287 [inline]
ip6_xmit+0x11c6/0x20c0 net/ipv6/ip6_output.c:275
inet6_csk_xmit+0x2fb/0x5d0 net/ipv6/inet6_connection_sock.c:139
__tcp_transmit_skb+0x1a32/0x3750 net/ipv4/tcp_output.c:1159
tcp_transmit_skb net/ipv4/tcp_output.c:1175 [inline]
tcp_connect+0x2e43/0x4330 net/ipv4/tcp_output.c:3538
tcp_v6_connect+0x15c3/0x2180 net/ipv6/tcp_ipv6.c:319
__inet_stream_connect+0x83f/0xea0 net/ipv4/af_inet.c:655
inet_stream_connect+0x58/0xa0 net/ipv4/af_inet.c:719
__sys_connect+0x266/0x330 net/socket.c:1685
__do_sys_connect net/socket.c:1696 [inline]
__se_sys_connect net/socket.c:1693 [inline]
__x64_sys_connect+0x73/0xb0 net/socket.c:1693
do_syscall_64+0x103/0x610 arch/x86/entry/common.c:290
entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x457f29
Code: ad b8 fb ff c3 66 2e 0f 1f 84 00 00 00 00 00 66 90 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 7b b8 fb ff c3 66 2e 0f 1f 84 00 00 00 00
RSP: 002b:00007f051dbfcc78 EFLAGS: 00000246 ORIG_RAX: 000000000000002a
RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 0000000000457f29
RDX: 000000000000001c RSI: 0000000020000080 RDI: 0000000000000006
RBP: 000000000073bf00 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00007f051dbfd6d4
R13: 00000000004be35b R14: 00000000004ceae8 R15: 00000000ffffffff
---
This bug is generated by a bot. It may contain errors.
See https://goo.gl/tpsmEJ for more information about syzbot.
syzbot engineers can be reached at syzk...@googlegroups.com.
syzbot will keep track of this bug report. See:
https://goo.gl/tpsmEJ#bug-status-tracking for how to communicate with
syzbot.
syzbot found the following crash on:
HEAD commit: 41af8b3a net: lio_core: fix two NULL pointer dereferences
git tree: net
console output: https://syzkaller.appspot.com/x/log.txt?x=137e3b13200000
kernel config: https://syzkaller.appspot.com/x/.config?x=73d88a42238825ad
dashboard link: https://syzkaller.appspot.com/bug?extid=090ba3ae3deee6a4b1cc
compiler: gcc (GCC) 9.0.0 20181231 (experimental)
userspace arch: amd64
CC: [core...@netfilter.org da...@davemloft.net f...@strlen.de
kad...@blackhole.kfki.hu linux-...@vger.kernel.org
net...@vger.kernel.org netfilt...@vger.kernel.org pa...@netfilter.org
net...@vger.kernel.org]
Unfortunately, I don't have any reproducer for this crash yet.
IMPORTANT: if you fix the bug, please add the following tag to the commit:
Reported-by: syzbot+090ba3...@syzkaller.appspotmail.com
rcu: INFO: rcu_preempt self-detected stall on CPU
rcu: 0-...!: (10501 ticks this GP) idle=18e/1/0x4000000000000002
softirq=18876/18876 fqs=0
rcu: (t=10502 jiffies g=15117 q=1029)
rcu: rcu_preempt kthread starved for 10503 jiffies! g15117 f0x0
RCU_GP_WAIT_FQS(5) ->state=0x402 ->cpu=0
rcu: RCU grace-period kthread stack dump:
rcu_preempt I29024 10 2 0x80000000
Call Trace:
context_switch kernel/sched/core.c:2844 [inline]
__schedule+0x817/0x1cc0 kernel/sched/core.c:3485
schedule+0x92/0x180 kernel/sched/core.c:3529
schedule_timeout+0x4db/0xfd0 kernel/time/timer.c:1803
rcu_gp_fqs_loop kernel/rcu/tree.c:1948 [inline]
rcu_gp_kthread+0x956/0x17a0 kernel/rcu/tree.c:2105
kthread+0x357/0x430 kernel/kthread.c:246
ret_from_fork+0x3a/0x50 arch/x86/entry/entry_64.S:352
NMI backtrace for cpu 0
CPU: 0 PID: 9825 Comm: syz-executor.4 Not tainted 5.0.0+ #118
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS
Google 01/01/2011
Call Trace:
<IRQ>
__dump_stack lib/dump_stack.c:77 [inline]
dump_stack+0x172/0x1f0 lib/dump_stack.c:113
nmi_cpu_backtrace.cold+0x63/0xa4 lib/nmi_backtrace.c:101
nmi_trigger_cpumask_backtrace+0x1be/0x236 lib/nmi_backtrace.c:62
arch_trigger_cpumask_backtrace+0x14/0x20 arch/x86/kernel/apic/hw_nmi.c:38
trigger_single_cpu_backtrace include/linux/nmi.h:164 [inline]
rcu_dump_cpu_stacks+0x183/0x1cf kernel/rcu/tree.c:1211
print_cpu_stall kernel/rcu/tree.c:1348 [inline]
check_cpu_stall kernel/rcu/tree.c:1422 [inline]
rcu_pending kernel/rcu/tree.c:3018 [inline]
rcu_check_callbacks.cold+0x500/0xa4a kernel/rcu/tree.c:2521
update_process_times+0x32/0x80 kernel/time/timer.c:1635
tick_sched_handle+0xa2/0x190 kernel/time/tick-sched.c:161
tick_sched_timer+0x47/0x130 kernel/time/tick-sched.c:1271
__run_hrtimer kernel/time/hrtimer.c:1389 [inline]
__hrtimer_run_queues+0x33e/0xde0 kernel/time/hrtimer.c:1451
hrtimer_interrupt+0x314/0x770 kernel/time/hrtimer.c:1509
local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1035 [inline]
smp_apic_timer_interrupt+0x120/0x570 arch/x86/kernel/apic/apic.c:1060
apic_timer_interrupt+0xf/0x20 arch/x86/entry/entry_64.S:807
</IRQ>
RIP: 0010:cpu_relax arch/x86/include/asm/processor.h:666 [inline]
RIP: 0010:virt_spin_lock arch/x86/include/asm/qspinlock.h:84 [inline]
RIP: 0010:native_queued_spin_lock_slowpath+0x132/0x970
kernel/locking/qspinlock.c:337
Code: 00 00 00 48 8b 45 d0 65 48 33 04 25 28 00 00 00 0f 85 a2 06 00 00 48
81 c4 98 00 00 00 5b 41 5c 41 5d 41 5e 41 5f 5d c3 f3 90 <e9> 73 ff ff ff
8b 45 98 4c 8d 65 d8 3d 00 01 00 00 0f 84 e5 00 00
RSP: 0018:ffff8880694ef090 EFLAGS: 00000202 ORIG_RAX: ffffffffffffff13
RAX: 0000000000000000 RBX: ffffe8ffffc75060 RCX: ffffffff81579127
RDX: 0000000000000000 RSI: 0000000000000004 RDI: ffffe8ffffc75060
RBP: ffff8880694ef150 R08: 1ffffd1ffff8ea0c R09: fffff91ffff8ea0d
R10: fffff91ffff8ea0c R11: ffffe8ffffc75063 R12: 0000000000000001
R13: 0000000000000003 R14: fffff91ffff8ea0c R15: 000000000000000b
pv_queued_spin_lock_slowpath arch/x86/include/asm/paravirt.h:653 [inline]
queued_spin_lock_slowpath arch/x86/include/asm/qspinlock.h:50 [inline]
queued_spin_lock include/asm-generic/qspinlock.h:90 [inline]
do_raw_spin_lock+0x20e/0x2e0 kernel/locking/spinlock_debug.c:113
__raw_spin_lock include/linux/spinlock_api_smp.h:143 [inline]
_raw_spin_lock+0x37/0x40 kernel/locking/spinlock.c:144
spin_lock include/linux/spinlock.h:329 [inline]
nf_ct_add_to_unconfirmed_list net/netfilter/nf_conntrack_core.c:487
[inline]
init_conntrack.isra.0+0xa07/0x1170 net/netfilter/nf_conntrack_core.c:1478
resolve_normal_ct net/netfilter/nf_conntrack_core.c:1519 [inline]
nf_conntrack_in+0xd93/0x1410 net/netfilter/nf_conntrack_core.c:1679
ipv6_conntrack_local+0x1e/0x30 net/netfilter/nf_conntrack_proto.c:194
nf_hook_entry_hookfn include/linux/netfilter.h:119 [inline]
nf_hook_slow+0xbf/0x1f0 net/netfilter/core.c:511
nf_hook include/linux/netfilter.h:244 [inline]
NF_HOOK include/linux/netfilter.h:287 [inline]
ip6_xmit+0x11c6/0x20c0 net/ipv6/ip6_output.c:275
inet6_csk_xmit+0x2fb/0x5d0 net/ipv6/inet6_connection_sock.c:139
__tcp_transmit_skb+0x1a32/0x3750 net/ipv4/tcp_output.c:1159
tcp_transmit_skb net/ipv4/tcp_output.c:1175 [inline]
tcp_connect+0x2e43/0x4330 net/ipv4/tcp_output.c:3538
tcp_v6_connect+0x15c3/0x2180 net/ipv6/tcp_ipv6.c:319
__inet_stream_connect+0x83f/0xea0 net/ipv4/af_inet.c:655
inet_stream_connect+0x58/0xa0 net/ipv4/af_inet.c:719
__sys_connect+0x266/0x330 net/socket.c:1685
__do_sys_connect net/socket.c:1696 [inline]
__se_sys_connect net/socket.c:1693 [inline]
__x64_sys_connect+0x73/0xb0 net/socket.c:1693
do_syscall_64+0x103/0x610 arch/x86/entry/common.c:290
entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x457f29
Code: ad b8 fb ff c3 66 2e 0f 1f 84 00 00 00 00 00 66 90 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 7b b8 fb ff c3 66 2e 0f 1f 84 00 00 00 00
RSP: 002b:00007f051dbfcc78 EFLAGS: 00000246 ORIG_RAX: 000000000000002a
RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 0000000000457f29
RDX: 000000000000001c RSI: 0000000020000080 RDI: 0000000000000006
RBP: 000000000073bf00 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00007f051dbfd6d4
R13: 00000000004be35b R14: 00000000004ceae8 R15: 00000000ffffffff
---
This bug is generated by a bot. It may contain errors.
See https://goo.gl/tpsmEJ for more information about syzbot.
syzbot engineers can be reached at syzk...@googlegroups.com.
syzbot will keep track of this bug report. See:
https://goo.gl/tpsmEJ#bug-status-tracking for how to communicate with
syzbot.
syzbot
Sep 7, 2019, 9:40:05 PM9/7/19
to syzkaller-upst...@googlegroups.com
Auto-closing this bug as obsolete.
Crashes did not happen for a while, no reproducer and no activity.
Crashes did not happen for a while, no reproducer and no activity.
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