INFO: rcu detected stall in __ipv6_dev_get_saddr
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syzbot
May 29, 2018, 11:06:03 PM5/29/18
to syzkaller-upst...@googlegroups.com
Hello,
syzbot found the following crash on:
HEAD commit: 3d661e2a2d1c Merge tag 'trace-v4.17-rc4-3' of git://git.ke..
git tree: upstream
console output: https://syzkaller.appspot.com/x/log.txt?x=14b6a9b7800000
kernel config: https://syzkaller.appspot.com/x/.config?x=968b0b23c7854c0b
dashboard link: https://syzkaller.appspot.com/bug?extid=484b9aefa16f46e9e68e
compiler: gcc (GCC) 8.0.1 20180413 (experimental)
CC: [da...@davemloft.net kuz...@ms2.inr.ac.ru
linux-...@vger.kernel.org net...@vger.kernel.org yosh...@linux-ipv6.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+484b9a...@syzkaller.appspotmail.com
netlink: 'syz-executor1': attribute type 3 has an invalid length.
netlink: 'syz-executor1': attribute type 3 has an invalid length.
INFO: rcu_sched self-detected stall on CPU
0-...!: (117036 ticks this GP) idle=1be/1/4611686018427387908
softirq=116331/116331 fqs=60
(t=125000 jiffies g=60807 c=60806 q=311074)
rcu_sched kthread starved for 124731 jiffies! g60807 c60806 f0x2
RCU_GP_WAIT_FQS(3) ->state=0x0 ->cpu=1
RCU grace-period kthread stack dump:
rcu_sched R running task 22584 9 2 0x80000000
Call Trace:
context_switch kernel/sched/core.c:2859 [inline]
__schedule+0x801/0x1e30 kernel/sched/core.c:3501
schedule+0xef/0x430 kernel/sched/core.c:3545
schedule_timeout+0x138/0x240 kernel/time/timer.c:1801
rcu_gp_kthread+0x6b5/0x1940 kernel/rcu/tree.c:2231
kthread+0x345/0x410 kernel/kthread.c:240
ret_from_fork+0x3a/0x50 arch/x86/entry/entry_64.S:412
NMI backtrace for cpu 0
CPU: 0 PID: 26596 Comm: syz-executor6 Not tainted 4.17.0-rc7+ #73
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+0x1b9/0x294 lib/dump_stack.c:113
nmi_cpu_backtrace.cold.4+0x19/0xce lib/nmi_backtrace.c:103
nmi_trigger_cpumask_backtrace+0x151/0x192 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:156 [inline]
rcu_dump_cpu_stacks+0x175/0x1c2 kernel/rcu/tree.c:1376
print_cpu_stall kernel/rcu/tree.c:1525 [inline]
check_cpu_stall.isra.61.cold.80+0x36c/0x59a kernel/rcu/tree.c:1593
__rcu_pending kernel/rcu/tree.c:3356 [inline]
rcu_pending kernel/rcu/tree.c:3401 [inline]
rcu_check_callbacks+0x21b/0xad0 kernel/rcu/tree.c:2763
update_process_times+0x2d/0x70 kernel/time/timer.c:1636
tick_sched_handle+0x9f/0x180 kernel/time/tick-sched.c:164
tick_sched_timer+0x45/0x130 kernel/time/tick-sched.c:1274
__run_hrtimer kernel/time/hrtimer.c:1398 [inline]
__hrtimer_run_queues+0x3e3/0x10a0 kernel/time/hrtimer.c:1460
hrtimer_interrupt+0x2f3/0x750 kernel/time/hrtimer.c:1518
local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1025 [inline]
smp_apic_timer_interrupt+0x15d/0x710 arch/x86/kernel/apic/apic.c:1050
apic_timer_interrupt+0xf/0x20 arch/x86/entry/entry_64.S:863
RIP: 0010:write_comp_data+0x1/0x70 kernel/kcov.c:116
RSP: 0018:ffff8801dae05f28 EFLAGS: 00000246 ORIG_RAX: ffffffffffffff13
RAX: ffff8801872ae180 RBX: 0000000000000000 RCX: ffffffff867a21af
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000005
RBP: ffff8801dae05f38 R08: ffff8801872ae180 R09: ffffed003b5c46d2
R10: ffffed003b5c46d2 R11: ffff8801dae23693 R12: ffff8801b40b9500
R13: ffff8801b40b9638 R14: ffff8801dae06298 R15: dffffc0000000000
__ipv6_dev_get_saddr+0x20f/0x560 net/ipv6/addrconf.c:1626
ipv6_dev_get_saddr+0xbde/0xfd0 net/ipv6/addrconf.c:1775
ip6_route_get_saddr include/net/ip6_route.h:124 [inline]
ip6_dst_lookup_tail+0x1319/0x1b30 net/ipv6/ip6_output.c:975
ip6_dst_lookup_flow+0xc1/0x260 net/ipv6/ip6_output.c:1096
sctp_v6_get_dst+0x727/0x20b0 net/sctp/ipv6.c:274
sctp_transport_route+0xad/0x450 net/sctp/transport.c:293
sctp_packet_config+0xb89/0xfd0 net/sctp/output.c:123
sctp_outq_flush+0x79c/0x4370 net/sctp/outqueue.c:894
sctp_outq_uncork+0x6a/0x80 net/sctp/outqueue.c:776
sctp_cmd_interpreter net/sctp/sm_sideeffect.c:1820 [inline]
sctp_side_effects net/sctp/sm_sideeffect.c:1220 [inline]
sctp_do_sm+0x596/0x7160 net/sctp/sm_sideeffect.c:1191
sctp_generate_heartbeat_event+0x218/0x450 net/sctp/sm_sideeffect.c:406
call_timer_fn+0x230/0x940 kernel/time/timer.c:1326
expire_timers kernel/time/timer.c:1363 [inline]
__run_timers+0x79e/0xc50 kernel/time/timer.c:1666
run_timer_softirq+0x4c/0x70 kernel/time/timer.c:1692
__do_softirq+0x2e0/0xaf5 kernel/softirq.c:285
invoke_softirq kernel/softirq.c:365 [inline]
irq_exit+0x1d1/0x200 kernel/softirq.c:405
exiting_irq arch/x86/include/asm/apic.h:525 [inline]
smp_apic_timer_interrupt+0x17e/0x710 arch/x86/kernel/apic/apic.c:1052
apic_timer_interrupt+0xf/0x20 arch/x86/entry/entry_64.S:863
</IRQ>
RIP: 0010:arch_local_irq_restore arch/x86/include/asm/paravirt.h:783
[inline]
RIP: 0010:lock_acquire+0x257/0x520 kernel/locking/lockdep.c:3923
RSP: 0018:ffff8801c9416718 EFLAGS: 00000286 ORIG_RAX: ffffffffffffff13
RAX: dffffc0000000000 RBX: 1ffff10039282ce8 RCX: 0000000000000000
RDX: 1ffffffff11a31ad RSI: ffff8801872ae9b8 RDI: 0000000000000286
RBP: ffff8801c9416808 R08: 0000000000000008 R09: 0000000000000001
R10: ffff8801872ae9e0 R11: ffff8801872ae180 R12: ffff8801872ae180
R13: 0000000000000002 R14: 0000000000000000 R15: 0000000000000000
rcu_lock_acquire include/linux/rcupdate.h:246 [inline]
rcu_read_lock+0x2b/0x70 include/linux/rcupdate.h:632
lock_page_memcg+0x6d/0x2f0 mm/memcontrol.c:1607
page_remove_file_rmap mm/rmap.c:1214 [inline]
page_remove_rmap+0x6ae/0x1250 mm/rmap.c:1299
zap_pte_range mm/memory.c:1337 [inline]
zap_pmd_range mm/memory.c:1441 [inline]
zap_pud_range mm/memory.c:1470 [inline]
zap_p4d_range mm/memory.c:1491 [inline]
unmap_page_range+0xeb4/0x2200 mm/memory.c:1512
unmap_single_vma+0x1a0/0x310 mm/memory.c:1557
unmap_vmas+0x120/0x1f0 mm/memory.c:1587
exit_mmap+0x2ba/0x5a0 mm/mmap.c:3105
__mmput kernel/fork.c:961 [inline]
mmput+0x251/0x610 kernel/fork.c:982
vhost_dev_cleanup+0xeba/0x14b0 drivers/vhost/vhost.c:639
vhost_vsock_dev_release+0x4bf/0x730 drivers/vhost/vsock.c:602
__fput+0x34d/0x890 fs/file_table.c:209
____fput+0x15/0x20 fs/file_table.c:243
task_work_run+0x1e4/0x290 kernel/task_work.c:113
exit_task_work include/linux/task_work.h:22 [inline]
do_exit+0xf89/0x2730 kernel/exit.c:865
do_group_exit+0x16f/0x430 kernel/exit.c:968
__do_sys_exit_group kernel/exit.c:979 [inline]
__se_sys_exit_group kernel/exit.c:977 [inline]
__x64_sys_exit_group+0x3e/0x50 kernel/exit.c:977
do_syscall_64+0x1b1/0x800 arch/x86/entry/common.c:287
entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x455a09
RSP: 002b:0000000000a3ea98 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7
RAX: ffffffffffffffda RBX: 0000000000000179 RCX: 0000000000455a09
RDX: 0000000000000008 RSI: 0000000000730a60 RDI: 0000000000000000
RBP: 0000000000000013 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000a3ea30 R11: 0000000000000246 R12: 0000000000000013
R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000001380
BUG: workqueue lockup - pool cpus=1 node=0 flags=0x0 nice=0 stuck for 126s!
BUG: workqueue lockup - pool cpus=1 node=0 flags=0x0 nice=-20 stuck for
123s!
Showing busy workqueues and worker pools:
workqueue events: flags=0x0
pwq 2: cpus=1 node=0 flags=0x0 nice=0 active=8/256
pending: defense_work_handler, defense_work_handler,
defense_work_handler, defense_work_handler, perf_sched_delayed,
check_corruption, switchdev_deferred_process_work, cache_reap
pwq 0: cpus=0 node=0 flags=0x0 nice=0 active=9/256
pending: defense_work_handler, defense_work_handler,
defense_work_handler, defense_work_handler, defense_work_handler,
key_garbage_collector, rht_deferred_worker, vmstat_shepherd, cache_reap
workqueue events_long: flags=0x0
pwq 0: cpus=0 node=0 flags=0x0 nice=0 active=3/256
pending: br_fdb_cleanup, br_fdb_cleanup, br_fdb_cleanup
workqueue events_unbound: flags=0x2
pwq 4: cpus=0-1 flags=0x4 nice=0 active=2/512
in-flight: 59:flush_to_ldisc flush_to_ldisc
workqueue events_power_efficient: flags=0x80
pwq 0: cpus=0 node=0 flags=0x0 nice=0 active=3/256
pending: gc_worker, do_cache_clean, neigh_periodic_work
workqueue mm_percpu_wq: flags=0x8
pwq 0: cpus=0 node=0 flags=0x0 nice=0 active=1/256
pending: vmstat_update
workqueue writeback: flags=0x4e
pwq 4: cpus=0-1 flags=0x4 nice=0 active=1/256
in-flight: 9678:wb_workfn
workqueue kblockd: flags=0x18
pwq 1: cpus=0 node=0 flags=0x0 nice=-20 active=1/256
pending: blk_mq_timeout_work
pool 4: cpus=0-1 flags=0x4 nice=0 hung=0s workers=7 idle: 7800 6621 6 22 469
device bridge_slave_1 left promiscuous mode
bridge0: port 2(bridge_slave_1) entered disabled state
device bridge_slave_0 left promiscuous mode
bridge0: port 1(bridge_slave_0) entered disabled state
team0 (unregistering): Port device team_slave_1 removed
team0 (unregistering): Port device team_slave_0 removed
bond0 (unregistering): Releasing backup interface bond_slave_1
bond0 (unregistering): Releasing backup interface bond_slave_0
bond0 (unregistering): Released all slaves
IPVS: ftp: loaded support on port[0] = 21
IPVS: stopping backup sync thread 21628 ...
IPVS: stopping backup sync thread 7560 ...
IPVS: stopping master sync thread 20283 ...
IPVS: ftp: loaded support on port[0] = 21
IPVS: ftp: loaded support on port[0] = 21
device bridge_slave_1 left promiscuous mode
bridge0: port 2(bridge_slave_1) entered disabled state
device bridge_slave_0 left promiscuous mode
bridge0: port 1(bridge_slave_0) entered disabled state
device bridge_slave_1 left promiscuous mode
bridge0: port 2(bridge_slave_1) entered disabled state
device bridge_slave_0 left promiscuous mode
bridge0: port 1(bridge_slave_0) entered disabled state
device bridge_slave_1 left promiscuous mode
bridge0: port 2(bridge_slave_1) entered disabled state
device bridge_slave_0 left promiscuous mode
bridge0: port 1(bridge_slave_0) entered disabled state
device bridge_slave_1 left promiscuous mode
bridge0: port 2(bridge_slave_1) entered disabled state
device bridge_slave_0 left promiscuous mode
bridge0: port 1(bridge_slave_0) entered disabled state
device bridge_slave_1 left promiscuous mode
bridge0: port 2(bridge_slave_1) entered disabled state
device bridge_slave_0 left promiscuous mode
bridge0: port 1(bridge_slave_0) entered disabled state
team0 (unregistering): Port device team_slave_1 removed
team0 (unregistering): Port device team_slave_0 removed
bond0 (unregistering): Releasing backup interface bond_slave_1
bond0 (unregistering): Releasing backup interface bond_slave_0
bond0 (unregistering): Released all slaves
team0 (unregistering): Port device team_slave_1 removed
team0 (unregistering): Port device team_slave_0 removed
bond0 (unregistering): Releasing backup interface bond_slave_1
bond0 (unregistering): Releasing backup interface bond_slave_0
bond0 (unregistering): Released all slaves
team0 (unregistering): Port device team_slave_1 removed
team0 (unregistering): Port device team_slave_0 removed
bond0 (unregistering): Releasing backup interface bond_slave_1
bond0 (unregistering): Releasing backup interface bond_slave_0
bond0 (unregistering): Released all slaves
team0 (unregistering): Port device team_slave_1 removed
team0 (unregistering): Port device team_slave_0 removed
bond0 (unregistering): Releasing backup interface bond_slave_1
bond0 (unregistering): Releasing backup interface bond_slave_0
bond0 (unregistering): Released all slaves
team0 (unregistering): Port device team_slave_1 removed
team0 (unregistering): Port device team_slave_0 removed
bond0 (unregistering): Releasing backup interface bond_slave_1
bond0 (unregistering): Releasing backup interface bond_slave_0
bond0 (unregistering): Released all slaves
team0 (unregistering): Port device team_slave_1 removed
team0 (unregistering): Port device team_slave_0 removed
bond0 (unregistering): Releasing backup interface bond_slave_1
bond0 (unregistering): Releasing backup interface bond_slave_0
bond0 (unregistering): Released all slaves
bridge0: port 1(bridge_slave_0) entered blocking state
bridge0: port 1(bridge_slave_0) entered disabled state
device bridge_slave_0 entered promiscuous mode
bridge0: port 2(bridge_slave_1) entered blocking state
bridge0: port 2(bridge_slave_1) entered disabled state
device bridge_slave_1 entered promiscuous mode
IPv6: ADDRCONF(NETDEV_UP): veth0_to_bridge: link is not ready
bridge0: port 1(bridge_slave_0) entered blocking state
bridge0: port 1(bridge_slave_0) entered disabled state
device bridge_slave_0 entered promiscuous mode
IPv6: ADDRCONF(NETDEV_UP): veth1_to_bridge: link is not ready
bridge0: port 2(bridge_slave_1) entered blocking state
bridge0: port 2(bridge_slave_1) entered disabled state
device bridge_slave_1 entered promiscuous mode
---
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: 3d661e2a2d1c Merge tag 'trace-v4.17-rc4-3' of git://git.ke..
git tree: upstream
console output: https://syzkaller.appspot.com/x/log.txt?x=14b6a9b7800000
kernel config: https://syzkaller.appspot.com/x/.config?x=968b0b23c7854c0b
dashboard link: https://syzkaller.appspot.com/bug?extid=484b9aefa16f46e9e68e
compiler: gcc (GCC) 8.0.1 20180413 (experimental)
CC: [da...@davemloft.net kuz...@ms2.inr.ac.ru
linux-...@vger.kernel.org net...@vger.kernel.org yosh...@linux-ipv6.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+484b9a...@syzkaller.appspotmail.com
netlink: 'syz-executor1': attribute type 3 has an invalid length.
netlink: 'syz-executor1': attribute type 3 has an invalid length.
INFO: rcu_sched self-detected stall on CPU
0-...!: (117036 ticks this GP) idle=1be/1/4611686018427387908
softirq=116331/116331 fqs=60
(t=125000 jiffies g=60807 c=60806 q=311074)
rcu_sched kthread starved for 124731 jiffies! g60807 c60806 f0x2
RCU_GP_WAIT_FQS(3) ->state=0x0 ->cpu=1
RCU grace-period kthread stack dump:
rcu_sched R running task 22584 9 2 0x80000000
Call Trace:
context_switch kernel/sched/core.c:2859 [inline]
__schedule+0x801/0x1e30 kernel/sched/core.c:3501
schedule+0xef/0x430 kernel/sched/core.c:3545
schedule_timeout+0x138/0x240 kernel/time/timer.c:1801
rcu_gp_kthread+0x6b5/0x1940 kernel/rcu/tree.c:2231
kthread+0x345/0x410 kernel/kthread.c:240
ret_from_fork+0x3a/0x50 arch/x86/entry/entry_64.S:412
NMI backtrace for cpu 0
CPU: 0 PID: 26596 Comm: syz-executor6 Not tainted 4.17.0-rc7+ #73
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+0x1b9/0x294 lib/dump_stack.c:113
nmi_cpu_backtrace.cold.4+0x19/0xce lib/nmi_backtrace.c:103
nmi_trigger_cpumask_backtrace+0x151/0x192 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:156 [inline]
rcu_dump_cpu_stacks+0x175/0x1c2 kernel/rcu/tree.c:1376
print_cpu_stall kernel/rcu/tree.c:1525 [inline]
check_cpu_stall.isra.61.cold.80+0x36c/0x59a kernel/rcu/tree.c:1593
__rcu_pending kernel/rcu/tree.c:3356 [inline]
rcu_pending kernel/rcu/tree.c:3401 [inline]
rcu_check_callbacks+0x21b/0xad0 kernel/rcu/tree.c:2763
update_process_times+0x2d/0x70 kernel/time/timer.c:1636
tick_sched_handle+0x9f/0x180 kernel/time/tick-sched.c:164
tick_sched_timer+0x45/0x130 kernel/time/tick-sched.c:1274
__run_hrtimer kernel/time/hrtimer.c:1398 [inline]
__hrtimer_run_queues+0x3e3/0x10a0 kernel/time/hrtimer.c:1460
hrtimer_interrupt+0x2f3/0x750 kernel/time/hrtimer.c:1518
local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1025 [inline]
smp_apic_timer_interrupt+0x15d/0x710 arch/x86/kernel/apic/apic.c:1050
apic_timer_interrupt+0xf/0x20 arch/x86/entry/entry_64.S:863
RIP: 0010:write_comp_data+0x1/0x70 kernel/kcov.c:116
RSP: 0018:ffff8801dae05f28 EFLAGS: 00000246 ORIG_RAX: ffffffffffffff13
RAX: ffff8801872ae180 RBX: 0000000000000000 RCX: ffffffff867a21af
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000005
RBP: ffff8801dae05f38 R08: ffff8801872ae180 R09: ffffed003b5c46d2
R10: ffffed003b5c46d2 R11: ffff8801dae23693 R12: ffff8801b40b9500
R13: ffff8801b40b9638 R14: ffff8801dae06298 R15: dffffc0000000000
__ipv6_dev_get_saddr+0x20f/0x560 net/ipv6/addrconf.c:1626
ipv6_dev_get_saddr+0xbde/0xfd0 net/ipv6/addrconf.c:1775
ip6_route_get_saddr include/net/ip6_route.h:124 [inline]
ip6_dst_lookup_tail+0x1319/0x1b30 net/ipv6/ip6_output.c:975
ip6_dst_lookup_flow+0xc1/0x260 net/ipv6/ip6_output.c:1096
sctp_v6_get_dst+0x727/0x20b0 net/sctp/ipv6.c:274
sctp_transport_route+0xad/0x450 net/sctp/transport.c:293
sctp_packet_config+0xb89/0xfd0 net/sctp/output.c:123
sctp_outq_flush+0x79c/0x4370 net/sctp/outqueue.c:894
sctp_outq_uncork+0x6a/0x80 net/sctp/outqueue.c:776
sctp_cmd_interpreter net/sctp/sm_sideeffect.c:1820 [inline]
sctp_side_effects net/sctp/sm_sideeffect.c:1220 [inline]
sctp_do_sm+0x596/0x7160 net/sctp/sm_sideeffect.c:1191
sctp_generate_heartbeat_event+0x218/0x450 net/sctp/sm_sideeffect.c:406
call_timer_fn+0x230/0x940 kernel/time/timer.c:1326
expire_timers kernel/time/timer.c:1363 [inline]
__run_timers+0x79e/0xc50 kernel/time/timer.c:1666
run_timer_softirq+0x4c/0x70 kernel/time/timer.c:1692
__do_softirq+0x2e0/0xaf5 kernel/softirq.c:285
invoke_softirq kernel/softirq.c:365 [inline]
irq_exit+0x1d1/0x200 kernel/softirq.c:405
exiting_irq arch/x86/include/asm/apic.h:525 [inline]
smp_apic_timer_interrupt+0x17e/0x710 arch/x86/kernel/apic/apic.c:1052
apic_timer_interrupt+0xf/0x20 arch/x86/entry/entry_64.S:863
</IRQ>
RIP: 0010:arch_local_irq_restore arch/x86/include/asm/paravirt.h:783
[inline]
RIP: 0010:lock_acquire+0x257/0x520 kernel/locking/lockdep.c:3923
RSP: 0018:ffff8801c9416718 EFLAGS: 00000286 ORIG_RAX: ffffffffffffff13
RAX: dffffc0000000000 RBX: 1ffff10039282ce8 RCX: 0000000000000000
RDX: 1ffffffff11a31ad RSI: ffff8801872ae9b8 RDI: 0000000000000286
RBP: ffff8801c9416808 R08: 0000000000000008 R09: 0000000000000001
R10: ffff8801872ae9e0 R11: ffff8801872ae180 R12: ffff8801872ae180
R13: 0000000000000002 R14: 0000000000000000 R15: 0000000000000000
rcu_lock_acquire include/linux/rcupdate.h:246 [inline]
rcu_read_lock+0x2b/0x70 include/linux/rcupdate.h:632
lock_page_memcg+0x6d/0x2f0 mm/memcontrol.c:1607
page_remove_file_rmap mm/rmap.c:1214 [inline]
page_remove_rmap+0x6ae/0x1250 mm/rmap.c:1299
zap_pte_range mm/memory.c:1337 [inline]
zap_pmd_range mm/memory.c:1441 [inline]
zap_pud_range mm/memory.c:1470 [inline]
zap_p4d_range mm/memory.c:1491 [inline]
unmap_page_range+0xeb4/0x2200 mm/memory.c:1512
unmap_single_vma+0x1a0/0x310 mm/memory.c:1557
unmap_vmas+0x120/0x1f0 mm/memory.c:1587
exit_mmap+0x2ba/0x5a0 mm/mmap.c:3105
__mmput kernel/fork.c:961 [inline]
mmput+0x251/0x610 kernel/fork.c:982
vhost_dev_cleanup+0xeba/0x14b0 drivers/vhost/vhost.c:639
vhost_vsock_dev_release+0x4bf/0x730 drivers/vhost/vsock.c:602
__fput+0x34d/0x890 fs/file_table.c:209
____fput+0x15/0x20 fs/file_table.c:243
task_work_run+0x1e4/0x290 kernel/task_work.c:113
exit_task_work include/linux/task_work.h:22 [inline]
do_exit+0xf89/0x2730 kernel/exit.c:865
do_group_exit+0x16f/0x430 kernel/exit.c:968
__do_sys_exit_group kernel/exit.c:979 [inline]
__se_sys_exit_group kernel/exit.c:977 [inline]
__x64_sys_exit_group+0x3e/0x50 kernel/exit.c:977
do_syscall_64+0x1b1/0x800 arch/x86/entry/common.c:287
entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x455a09
RSP: 002b:0000000000a3ea98 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7
RAX: ffffffffffffffda RBX: 0000000000000179 RCX: 0000000000455a09
RDX: 0000000000000008 RSI: 0000000000730a60 RDI: 0000000000000000
RBP: 0000000000000013 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000a3ea30 R11: 0000000000000246 R12: 0000000000000013
R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000001380
BUG: workqueue lockup - pool cpus=1 node=0 flags=0x0 nice=0 stuck for 126s!
BUG: workqueue lockup - pool cpus=1 node=0 flags=0x0 nice=-20 stuck for
123s!
Showing busy workqueues and worker pools:
workqueue events: flags=0x0
pwq 2: cpus=1 node=0 flags=0x0 nice=0 active=8/256
pending: defense_work_handler, defense_work_handler,
defense_work_handler, defense_work_handler, perf_sched_delayed,
check_corruption, switchdev_deferred_process_work, cache_reap
pwq 0: cpus=0 node=0 flags=0x0 nice=0 active=9/256
pending: defense_work_handler, defense_work_handler,
defense_work_handler, defense_work_handler, defense_work_handler,
key_garbage_collector, rht_deferred_worker, vmstat_shepherd, cache_reap
workqueue events_long: flags=0x0
pwq 0: cpus=0 node=0 flags=0x0 nice=0 active=3/256
pending: br_fdb_cleanup, br_fdb_cleanup, br_fdb_cleanup
workqueue events_unbound: flags=0x2
pwq 4: cpus=0-1 flags=0x4 nice=0 active=2/512
in-flight: 59:flush_to_ldisc flush_to_ldisc
workqueue events_power_efficient: flags=0x80
pwq 0: cpus=0 node=0 flags=0x0 nice=0 active=3/256
pending: gc_worker, do_cache_clean, neigh_periodic_work
workqueue mm_percpu_wq: flags=0x8
pwq 0: cpus=0 node=0 flags=0x0 nice=0 active=1/256
pending: vmstat_update
workqueue writeback: flags=0x4e
pwq 4: cpus=0-1 flags=0x4 nice=0 active=1/256
in-flight: 9678:wb_workfn
workqueue kblockd: flags=0x18
pwq 1: cpus=0 node=0 flags=0x0 nice=-20 active=1/256
pending: blk_mq_timeout_work
pool 4: cpus=0-1 flags=0x4 nice=0 hung=0s workers=7 idle: 7800 6621 6 22 469
device bridge_slave_1 left promiscuous mode
bridge0: port 2(bridge_slave_1) entered disabled state
device bridge_slave_0 left promiscuous mode
bridge0: port 1(bridge_slave_0) entered disabled state
team0 (unregistering): Port device team_slave_1 removed
team0 (unregistering): Port device team_slave_0 removed
bond0 (unregistering): Releasing backup interface bond_slave_1
bond0 (unregistering): Releasing backup interface bond_slave_0
bond0 (unregistering): Released all slaves
IPVS: ftp: loaded support on port[0] = 21
IPVS: stopping backup sync thread 21628 ...
IPVS: stopping backup sync thread 7560 ...
IPVS: stopping master sync thread 20283 ...
IPVS: ftp: loaded support on port[0] = 21
IPVS: ftp: loaded support on port[0] = 21
device bridge_slave_1 left promiscuous mode
bridge0: port 2(bridge_slave_1) entered disabled state
device bridge_slave_0 left promiscuous mode
bridge0: port 1(bridge_slave_0) entered disabled state
device bridge_slave_1 left promiscuous mode
bridge0: port 2(bridge_slave_1) entered disabled state
device bridge_slave_0 left promiscuous mode
bridge0: port 1(bridge_slave_0) entered disabled state
device bridge_slave_1 left promiscuous mode
bridge0: port 2(bridge_slave_1) entered disabled state
device bridge_slave_0 left promiscuous mode
bridge0: port 1(bridge_slave_0) entered disabled state
device bridge_slave_1 left promiscuous mode
bridge0: port 2(bridge_slave_1) entered disabled state
device bridge_slave_0 left promiscuous mode
bridge0: port 1(bridge_slave_0) entered disabled state
device bridge_slave_1 left promiscuous mode
bridge0: port 2(bridge_slave_1) entered disabled state
device bridge_slave_0 left promiscuous mode
bridge0: port 1(bridge_slave_0) entered disabled state
team0 (unregistering): Port device team_slave_1 removed
team0 (unregistering): Port device team_slave_0 removed
bond0 (unregistering): Releasing backup interface bond_slave_1
bond0 (unregistering): Releasing backup interface bond_slave_0
bond0 (unregistering): Released all slaves
team0 (unregistering): Port device team_slave_1 removed
team0 (unregistering): Port device team_slave_0 removed
bond0 (unregistering): Releasing backup interface bond_slave_1
bond0 (unregistering): Releasing backup interface bond_slave_0
bond0 (unregistering): Released all slaves
team0 (unregistering): Port device team_slave_1 removed
team0 (unregistering): Port device team_slave_0 removed
bond0 (unregistering): Releasing backup interface bond_slave_1
bond0 (unregistering): Releasing backup interface bond_slave_0
bond0 (unregistering): Released all slaves
team0 (unregistering): Port device team_slave_1 removed
team0 (unregistering): Port device team_slave_0 removed
bond0 (unregistering): Releasing backup interface bond_slave_1
bond0 (unregistering): Releasing backup interface bond_slave_0
bond0 (unregistering): Released all slaves
team0 (unregistering): Port device team_slave_1 removed
team0 (unregistering): Port device team_slave_0 removed
bond0 (unregistering): Releasing backup interface bond_slave_1
bond0 (unregistering): Releasing backup interface bond_slave_0
bond0 (unregistering): Released all slaves
team0 (unregistering): Port device team_slave_1 removed
team0 (unregistering): Port device team_slave_0 removed
bond0 (unregistering): Releasing backup interface bond_slave_1
bond0 (unregistering): Releasing backup interface bond_slave_0
bond0 (unregistering): Released all slaves
bridge0: port 1(bridge_slave_0) entered blocking state
bridge0: port 1(bridge_slave_0) entered disabled state
device bridge_slave_0 entered promiscuous mode
bridge0: port 2(bridge_slave_1) entered blocking state
bridge0: port 2(bridge_slave_1) entered disabled state
device bridge_slave_1 entered promiscuous mode
IPv6: ADDRCONF(NETDEV_UP): veth0_to_bridge: link is not ready
bridge0: port 1(bridge_slave_0) entered blocking state
bridge0: port 1(bridge_slave_0) entered disabled state
device bridge_slave_0 entered promiscuous mode
IPv6: ADDRCONF(NETDEV_UP): veth1_to_bridge: link is not ready
bridge0: port 2(bridge_slave_1) entered blocking state
bridge0: port 2(bridge_slave_1) entered disabled state
device bridge_slave_1 entered promiscuous mode
---
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.
Dmitry Vyukov
Jun 4, 2018, 4:14:50 AM6/4/18
to syzbot, 'Dmitry Vyukov' via syzkaller-upstream-moderation
#syz fix: sctp: not allow to set rto_min with a value below 200 msecs
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