INFO: rcu detected stall in discover_timer
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syzbot
Jan 5, 2020, 3:03:10 PM1/5/20
to syzkaller...@googlegroups.com
Hello,
syzbot found the following crash on:
HEAD commit: 84f5ad46 Linux 4.14.162
git tree: linux-4.14.y
console output: https://syzkaller.appspot.com/x/log.txt?x=1383f971e00000
kernel config: https://syzkaller.appspot.com/x/.config?x=67bcc84091a71c98
dashboard link: https://syzkaller.appspot.com/bug?extid=c9f96b046ae341acce55
compiler: gcc (GCC) 9.0.0 20181231 (experimental)
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+c9f96b...@syzkaller.appspotmail.com
INFO: rcu_preempt detected stalls on CPUs/tasks:
Tasks blocked on level-0 rcu_node (CPUs 0-1): P31274
(detected by 1, t=10503 jiffies, g=17608, c=17607, q=126)
syz-executor.4 R running task 27728 31274 7314 0x0000000c
Call Trace:
<IRQ>
sched_show_task kernel/sched/core.c:5168 [inline]
sched_show_task.cold+0x2f0/0x351 kernel/sched/core.c:5143
rcu_print_detail_task_stall_rnp+0xc7/0x103 kernel/rcu/tree_plugin.h:568
rcu_print_detail_task_stall kernel/rcu/tree_plugin.h:581 [inline]
print_other_cpu_stall kernel/rcu/tree.c:1488 [inline]
check_cpu_stall kernel/rcu/tree.c:1616 [inline]
__rcu_pending kernel/rcu/tree.c:3390 [inline]
rcu_pending kernel/rcu/tree.c:3452 [inline]
rcu_check_callbacks.cold+0x74c/0xd0a kernel/rcu/tree.c:2792
update_process_times+0x31/0x70 kernel/time/timer.c:1590
tick_sched_handle+0x85/0x160 kernel/time/tick-sched.c:161
tick_sched_timer+0x43/0x130 kernel/time/tick-sched.c:1219
__run_hrtimer kernel/time/hrtimer.c:1223 [inline]
__hrtimer_run_queues+0x270/0xbc0 kernel/time/hrtimer.c:1287
hrtimer_interrupt+0x1d8/0x5d0 kernel/time/hrtimer.c:1321
local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1075 [inline]
smp_apic_timer_interrupt+0x11c/0x5e0 arch/x86/kernel/apic/apic.c:1100
apic_timer_interrupt+0x96/0xa0 arch/x86/entry/entry_64.S:792
RIP: 0010:kasan_kmalloc+0x0/0xf0 mm/kasan/kasan.c:531
RSP: 0018:ffff8880aed07b20 EFLAGS: 00000206 ORIG_RAX: ffffffffffffff10
RAX: ffff88808424f200 RBX: ffff8880aed07bc0 RCX: 0000000001090220
RDX: 0000000000000240 RSI: ffff88808424f200 RDI: ffff8880aa800ac0
RBP: ffff8880aed07b48 R08: 00000000cf7bd4ac R09: 0000000000000004
R10: 0000000000000000 R11: ffff88808398e080 R12: 0000000000000240
R13: 0000000001090220 R14: ffff8880aa800ac0 R15: ffff88808424f200
__kmalloc_reserve.isra.0+0x40/0xe0 net/core/skbuff.c:137
__alloc_skb+0xcf/0x500 net/core/skbuff.c:205
alloc_skb include/linux/skbuff.h:980 [inline]
new_skb+0x28/0x1d0 drivers/block/aoe/aoecmd.c:67
aoecmd_cfg_pkts drivers/block/aoe/aoecmd.c:427 [inline]
aoecmd_cfg+0x180/0x5c0 drivers/block/aoe/aoecmd.c:1392
discover_timer drivers/block/aoe/aoemain.c:44 [inline]
discover_timer+0xcd/0x170 drivers/block/aoe/aoemain.c:21
call_timer_fn+0x161/0x670 kernel/time/timer.c:1279
expire_timers kernel/time/timer.c:1318 [inline]
__run_timers kernel/time/timer.c:1636 [inline]
__run_timers kernel/time/timer.c:1604 [inline]
run_timer_softirq+0x5b7/0x1520 kernel/time/timer.c:1649
__do_softirq+0x244/0x9a0 kernel/softirq.c:288
invoke_softirq kernel/softirq.c:368 [inline]
irq_exit+0x160/0x1b0 kernel/softirq.c:409
exiting_irq arch/x86/include/asm/apic.h:648 [inline]
smp_apic_timer_interrupt+0x146/0x5e0 arch/x86/kernel/apic/apic.c:1102
apic_timer_interrupt+0x96/0xa0 arch/x86/entry/entry_64.S:792
</IRQ>
RIP: 0010:preempt_schedule_common+0x0/0xe0 kernel/sched/core.c:3491
RSP: 0018:ffff88806f217898 EFLAGS: 00000202 ORIG_RAX: ffffffffffffff10
RAX: 0000000000000282 RBX: 0000000000000000 RCX: 0000000000000000
RDX: dffffc0000000000 RSI: 0000000000000003 RDI: 0000000000000001
RBP: ffff88806f2178a0 R08: ffff88808398e080 R09: 0000000000000002
R10: 0000000000000000 R11: ffff88808398e080 R12: ffff88808824aa08
R13: ffff88808824aa08 R14: ffff8880a12df340 R15: ffff88808824a280
___preempt_schedule+0x16/0x18
__raw_spin_unlock include/linux/spinlock_api_smp.h:152 [inline]
_raw_spin_unlock+0x41/0x50 kernel/locking/spinlock.c:184
spin_unlock include/linux/spinlock.h:357 [inline]
task_unlock include/linux/sched/task.h:138 [inline]
get_task_umask fs/proc/array.c:154 [inline]
task_state fs/proc/array.c:181 [inline]
proc_pid_status+0x1e33/0x2240 fs/proc/array.c:400
proc_single_show+0xf0/0x160 fs/proc/base.c:761
seq_read+0x51a/0x1280 fs/seq_file.c:237
do_loop_readv_writev fs/read_write.c:695 [inline]
do_loop_readv_writev fs/read_write.c:682 [inline]
do_iter_read+0x3e2/0x5b0 fs/read_write.c:919
vfs_readv+0xd3/0x130 fs/read_write.c:981
do_preadv+0x15d/0x200 fs/read_write.c:1065
SYSC_preadv fs/read_write.c:1115 [inline]
SyS_preadv+0x31/0x40 fs/read_write.c:1110
do_syscall_64+0x1e8/0x640 arch/x86/entry/common.c:292
entry_SYSCALL_64_after_hwframe+0x42/0xb7
RIP: 0033:0x45af49
RSP: 002b:00007fd129e1ac78 EFLAGS: 00000246 ORIG_RAX: 0000000000000127
RAX: ffffffffffffffda RBX: 0000000000000004 RCX: 000000000045af49
RDX: 00000000000001a8 RSI: 00000000200017c0 RDI: 0000000000000003
RBP: 000000000075bf20 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00007fd129e1b6d4
R13: 00000000004c950f R14: 00000000004e1bd0 R15: 00000000ffffffff
syz-executor.4 R running task 27728 31274 7314 0x0000000c
Call Trace:
<IRQ>
sched_show_task kernel/sched/core.c:5168 [inline]
sched_show_task.cold+0x2f0/0x351 kernel/sched/core.c:5143
rcu_print_detail_task_stall_rnp+0xc7/0x103 kernel/rcu/tree_plugin.h:568
rcu_print_detail_task_stall kernel/rcu/tree_plugin.h:583 [inline]
print_other_cpu_stall kernel/rcu/tree.c:1488 [inline]
check_cpu_stall kernel/rcu/tree.c:1616 [inline]
__rcu_pending kernel/rcu/tree.c:3390 [inline]
rcu_pending kernel/rcu/tree.c:3452 [inline]
rcu_check_callbacks.cold+0x7a4/0xd0a kernel/rcu/tree.c:2792
update_process_times+0x31/0x70 kernel/time/timer.c:1590
tick_sched_handle+0x85/0x160 kernel/time/tick-sched.c:161
tick_sched_timer+0x43/0x130 kernel/time/tick-sched.c:1219
__run_hrtimer kernel/time/hrtimer.c:1223 [inline]
__hrtimer_run_queues+0x270/0xbc0 kernel/time/hrtimer.c:1287
hrtimer_interrupt+0x1d8/0x5d0 kernel/time/hrtimer.c:1321
local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1075 [inline]
smp_apic_timer_interrupt+0x11c/0x5e0 arch/x86/kernel/apic/apic.c:1100
apic_timer_interrupt+0x96/0xa0 arch/x86/entry/entry_64.S:792
RIP: 0010:kasan_kmalloc+0x0/0xf0 mm/kasan/kasan.c:531
RSP: 0018:ffff8880aed07b20 EFLAGS: 00000206 ORIG_RAX: ffffffffffffff10
RAX: ffff88808424f200 RBX: ffff8880aed07bc0 RCX: 0000000001090220
RDX: 0000000000000240 RSI: ffff88808424f200 RDI: ffff8880aa800ac0
RBP: ffff8880aed07b48 R08: 00000000cf7bd4ac R09: 0000000000000004
R10: 0000000000000000 R11: ffff88808398e080 R12: 0000000000000240
R13: 0000000001090220 R14: ffff8880aa800ac0 R15: ffff88808424f200
__kmalloc_reserve.isra.0+0x40/0xe0 net/core/skbuff.c:137
__alloc_skb+0xcf/0x500 net/core/skbuff.c:205
alloc_skb include/linux/skbuff.h:980 [inline]
new_skb+0x28/0x1d0 drivers/block/aoe/aoecmd.c:67
aoecmd_cfg_pkts drivers/block/aoe/aoecmd.c:427 [inline]
aoecmd_cfg+0x180/0x5c0 drivers/block/aoe/aoecmd.c:1392
discover_timer drivers/block/aoe/aoemain.c:44 [inline]
discover_timer+0xcd/0x170 drivers/block/aoe/aoemain.c:21
call_timer_fn+0x161/0x670 kernel/time/timer.c:1279
expire_timers kernel/time/timer.c:1318 [inline]
__run_timers kernel/time/timer.c:1636 [inline]
__run_timers kernel/time/timer.c:1604 [inline]
run_timer_softirq+0x5b7/0x1520 kernel/time/timer.c:1649
__do_softirq+0x244/0x9a0 kernel/softirq.c:288
invoke_softirq kernel/softirq.c:368 [inline]
irq_exit+0x160/0x1b0 kernel/softirq.c:409
exiting_irq arch/x86/include/asm/apic.h:648 [inline]
smp_apic_timer_interrupt+0x146/0x5e0 arch/x86/kernel/apic/apic.c:1102
apic_timer_interrupt+0x96/0xa0 arch/x86/entry/entry_64.S:792
</IRQ>
RIP: 0010:preempt_schedule_common+0x0/0xe0 kernel/sched/core.c:3491
RSP: 0018:ffff88806f217898 EFLAGS: 00000202 ORIG_RAX: ffffffffffffff10
RAX: 0000000000000282 RBX: 0000000000000000 RCX: 0000000000000000
RDX: dffffc0000000000 RSI: 0000000000000003 RDI: 0000000000000001
RBP: ffff88806f2178a0 R08: ffff88808398e080 R09: 0000000000000002
R10: 0000000000000000 R11: ffff88808398e080 R12: ffff88808824aa08
R13: ffff88808824aa08 R14: ffff8880a12df340 R15: ffff88808824a280
___preempt_schedule+0x16/0x18
__raw_spin_unlock include/linux/spinlock_api_smp.h:152 [inline]
_raw_spin_unlock+0x41/0x50 kernel/locking/spinlock.c:184
spin_unlock include/linux/spinlock.h:357 [inline]
task_unlock include/linux/sched/task.h:138 [inline]
get_task_umask fs/proc/array.c:154 [inline]
task_state fs/proc/array.c:181 [inline]
proc_pid_status+0x1e33/0x2240 fs/proc/array.c:400
proc_single_show+0xf0/0x160 fs/proc/base.c:761
seq_read+0x51a/0x1280 fs/seq_file.c:237
do_loop_readv_writev fs/read_write.c:695 [inline]
do_loop_readv_writev fs/read_write.c:682 [inline]
do_iter_read+0x3e2/0x5b0 fs/read_write.c:919
vfs_readv+0xd3/0x130 fs/read_write.c:981
do_preadv+0x15d/0x200 fs/read_write.c:1065
SYSC_preadv fs/read_write.c:1115 [inline]
SyS_preadv+0x31/0x40 fs/read_write.c:1110
do_syscall_64+0x1e8/0x640 arch/x86/entry/common.c:292
entry_SYSCALL_64_after_hwframe+0x42/0xb7
RIP: 0033:0x45af49
RSP: 002b:00007fd129e1ac78 EFLAGS: 00000246 ORIG_RAX: 0000000000000127
RAX: ffffffffffffffda RBX: 0000000000000004 RCX: 000000000045af49
RDX: 00000000000001a8 RSI: 00000000200017c0 RDI: 0000000000000003
RBP: 000000000075bf20 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00007fd129e1b6d4
R13: 00000000004c950f R14: 00000000004e1bd0 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#status for how to communicate with syzbot.
syzbot found the following crash on:
HEAD commit: 84f5ad46 Linux 4.14.162
git tree: linux-4.14.y
console output: https://syzkaller.appspot.com/x/log.txt?x=1383f971e00000
kernel config: https://syzkaller.appspot.com/x/.config?x=67bcc84091a71c98
dashboard link: https://syzkaller.appspot.com/bug?extid=c9f96b046ae341acce55
compiler: gcc (GCC) 9.0.0 20181231 (experimental)
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+c9f96b...@syzkaller.appspotmail.com
INFO: rcu_preempt detected stalls on CPUs/tasks:
Tasks blocked on level-0 rcu_node (CPUs 0-1): P31274
(detected by 1, t=10503 jiffies, g=17608, c=17607, q=126)
syz-executor.4 R running task 27728 31274 7314 0x0000000c
Call Trace:
<IRQ>
sched_show_task kernel/sched/core.c:5168 [inline]
sched_show_task.cold+0x2f0/0x351 kernel/sched/core.c:5143
rcu_print_detail_task_stall_rnp+0xc7/0x103 kernel/rcu/tree_plugin.h:568
rcu_print_detail_task_stall kernel/rcu/tree_plugin.h:581 [inline]
print_other_cpu_stall kernel/rcu/tree.c:1488 [inline]
check_cpu_stall kernel/rcu/tree.c:1616 [inline]
__rcu_pending kernel/rcu/tree.c:3390 [inline]
rcu_pending kernel/rcu/tree.c:3452 [inline]
rcu_check_callbacks.cold+0x74c/0xd0a kernel/rcu/tree.c:2792
update_process_times+0x31/0x70 kernel/time/timer.c:1590
tick_sched_handle+0x85/0x160 kernel/time/tick-sched.c:161
tick_sched_timer+0x43/0x130 kernel/time/tick-sched.c:1219
__run_hrtimer kernel/time/hrtimer.c:1223 [inline]
__hrtimer_run_queues+0x270/0xbc0 kernel/time/hrtimer.c:1287
hrtimer_interrupt+0x1d8/0x5d0 kernel/time/hrtimer.c:1321
local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1075 [inline]
smp_apic_timer_interrupt+0x11c/0x5e0 arch/x86/kernel/apic/apic.c:1100
apic_timer_interrupt+0x96/0xa0 arch/x86/entry/entry_64.S:792
RIP: 0010:kasan_kmalloc+0x0/0xf0 mm/kasan/kasan.c:531
RSP: 0018:ffff8880aed07b20 EFLAGS: 00000206 ORIG_RAX: ffffffffffffff10
RAX: ffff88808424f200 RBX: ffff8880aed07bc0 RCX: 0000000001090220
RDX: 0000000000000240 RSI: ffff88808424f200 RDI: ffff8880aa800ac0
RBP: ffff8880aed07b48 R08: 00000000cf7bd4ac R09: 0000000000000004
R10: 0000000000000000 R11: ffff88808398e080 R12: 0000000000000240
R13: 0000000001090220 R14: ffff8880aa800ac0 R15: ffff88808424f200
__kmalloc_reserve.isra.0+0x40/0xe0 net/core/skbuff.c:137
__alloc_skb+0xcf/0x500 net/core/skbuff.c:205
alloc_skb include/linux/skbuff.h:980 [inline]
new_skb+0x28/0x1d0 drivers/block/aoe/aoecmd.c:67
aoecmd_cfg_pkts drivers/block/aoe/aoecmd.c:427 [inline]
aoecmd_cfg+0x180/0x5c0 drivers/block/aoe/aoecmd.c:1392
discover_timer drivers/block/aoe/aoemain.c:44 [inline]
discover_timer+0xcd/0x170 drivers/block/aoe/aoemain.c:21
call_timer_fn+0x161/0x670 kernel/time/timer.c:1279
expire_timers kernel/time/timer.c:1318 [inline]
__run_timers kernel/time/timer.c:1636 [inline]
__run_timers kernel/time/timer.c:1604 [inline]
run_timer_softirq+0x5b7/0x1520 kernel/time/timer.c:1649
__do_softirq+0x244/0x9a0 kernel/softirq.c:288
invoke_softirq kernel/softirq.c:368 [inline]
irq_exit+0x160/0x1b0 kernel/softirq.c:409
exiting_irq arch/x86/include/asm/apic.h:648 [inline]
smp_apic_timer_interrupt+0x146/0x5e0 arch/x86/kernel/apic/apic.c:1102
apic_timer_interrupt+0x96/0xa0 arch/x86/entry/entry_64.S:792
</IRQ>
RIP: 0010:preempt_schedule_common+0x0/0xe0 kernel/sched/core.c:3491
RSP: 0018:ffff88806f217898 EFLAGS: 00000202 ORIG_RAX: ffffffffffffff10
RAX: 0000000000000282 RBX: 0000000000000000 RCX: 0000000000000000
RDX: dffffc0000000000 RSI: 0000000000000003 RDI: 0000000000000001
RBP: ffff88806f2178a0 R08: ffff88808398e080 R09: 0000000000000002
R10: 0000000000000000 R11: ffff88808398e080 R12: ffff88808824aa08
R13: ffff88808824aa08 R14: ffff8880a12df340 R15: ffff88808824a280
___preempt_schedule+0x16/0x18
__raw_spin_unlock include/linux/spinlock_api_smp.h:152 [inline]
_raw_spin_unlock+0x41/0x50 kernel/locking/spinlock.c:184
spin_unlock include/linux/spinlock.h:357 [inline]
task_unlock include/linux/sched/task.h:138 [inline]
get_task_umask fs/proc/array.c:154 [inline]
task_state fs/proc/array.c:181 [inline]
proc_pid_status+0x1e33/0x2240 fs/proc/array.c:400
proc_single_show+0xf0/0x160 fs/proc/base.c:761
seq_read+0x51a/0x1280 fs/seq_file.c:237
do_loop_readv_writev fs/read_write.c:695 [inline]
do_loop_readv_writev fs/read_write.c:682 [inline]
do_iter_read+0x3e2/0x5b0 fs/read_write.c:919
vfs_readv+0xd3/0x130 fs/read_write.c:981
do_preadv+0x15d/0x200 fs/read_write.c:1065
SYSC_preadv fs/read_write.c:1115 [inline]
SyS_preadv+0x31/0x40 fs/read_write.c:1110
do_syscall_64+0x1e8/0x640 arch/x86/entry/common.c:292
entry_SYSCALL_64_after_hwframe+0x42/0xb7
RIP: 0033:0x45af49
RSP: 002b:00007fd129e1ac78 EFLAGS: 00000246 ORIG_RAX: 0000000000000127
RAX: ffffffffffffffda RBX: 0000000000000004 RCX: 000000000045af49
RDX: 00000000000001a8 RSI: 00000000200017c0 RDI: 0000000000000003
RBP: 000000000075bf20 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00007fd129e1b6d4
R13: 00000000004c950f R14: 00000000004e1bd0 R15: 00000000ffffffff
syz-executor.4 R running task 27728 31274 7314 0x0000000c
Call Trace:
<IRQ>
sched_show_task kernel/sched/core.c:5168 [inline]
sched_show_task.cold+0x2f0/0x351 kernel/sched/core.c:5143
rcu_print_detail_task_stall_rnp+0xc7/0x103 kernel/rcu/tree_plugin.h:568
rcu_print_detail_task_stall kernel/rcu/tree_plugin.h:583 [inline]
print_other_cpu_stall kernel/rcu/tree.c:1488 [inline]
check_cpu_stall kernel/rcu/tree.c:1616 [inline]
__rcu_pending kernel/rcu/tree.c:3390 [inline]
rcu_pending kernel/rcu/tree.c:3452 [inline]
rcu_check_callbacks.cold+0x7a4/0xd0a kernel/rcu/tree.c:2792
update_process_times+0x31/0x70 kernel/time/timer.c:1590
tick_sched_handle+0x85/0x160 kernel/time/tick-sched.c:161
tick_sched_timer+0x43/0x130 kernel/time/tick-sched.c:1219
__run_hrtimer kernel/time/hrtimer.c:1223 [inline]
__hrtimer_run_queues+0x270/0xbc0 kernel/time/hrtimer.c:1287
hrtimer_interrupt+0x1d8/0x5d0 kernel/time/hrtimer.c:1321
local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1075 [inline]
smp_apic_timer_interrupt+0x11c/0x5e0 arch/x86/kernel/apic/apic.c:1100
apic_timer_interrupt+0x96/0xa0 arch/x86/entry/entry_64.S:792
RIP: 0010:kasan_kmalloc+0x0/0xf0 mm/kasan/kasan.c:531
RSP: 0018:ffff8880aed07b20 EFLAGS: 00000206 ORIG_RAX: ffffffffffffff10
RAX: ffff88808424f200 RBX: ffff8880aed07bc0 RCX: 0000000001090220
RDX: 0000000000000240 RSI: ffff88808424f200 RDI: ffff8880aa800ac0
RBP: ffff8880aed07b48 R08: 00000000cf7bd4ac R09: 0000000000000004
R10: 0000000000000000 R11: ffff88808398e080 R12: 0000000000000240
R13: 0000000001090220 R14: ffff8880aa800ac0 R15: ffff88808424f200
__kmalloc_reserve.isra.0+0x40/0xe0 net/core/skbuff.c:137
__alloc_skb+0xcf/0x500 net/core/skbuff.c:205
alloc_skb include/linux/skbuff.h:980 [inline]
new_skb+0x28/0x1d0 drivers/block/aoe/aoecmd.c:67
aoecmd_cfg_pkts drivers/block/aoe/aoecmd.c:427 [inline]
aoecmd_cfg+0x180/0x5c0 drivers/block/aoe/aoecmd.c:1392
discover_timer drivers/block/aoe/aoemain.c:44 [inline]
discover_timer+0xcd/0x170 drivers/block/aoe/aoemain.c:21
call_timer_fn+0x161/0x670 kernel/time/timer.c:1279
expire_timers kernel/time/timer.c:1318 [inline]
__run_timers kernel/time/timer.c:1636 [inline]
__run_timers kernel/time/timer.c:1604 [inline]
run_timer_softirq+0x5b7/0x1520 kernel/time/timer.c:1649
__do_softirq+0x244/0x9a0 kernel/softirq.c:288
invoke_softirq kernel/softirq.c:368 [inline]
irq_exit+0x160/0x1b0 kernel/softirq.c:409
exiting_irq arch/x86/include/asm/apic.h:648 [inline]
smp_apic_timer_interrupt+0x146/0x5e0 arch/x86/kernel/apic/apic.c:1102
apic_timer_interrupt+0x96/0xa0 arch/x86/entry/entry_64.S:792
</IRQ>
RIP: 0010:preempt_schedule_common+0x0/0xe0 kernel/sched/core.c:3491
RSP: 0018:ffff88806f217898 EFLAGS: 00000202 ORIG_RAX: ffffffffffffff10
RAX: 0000000000000282 RBX: 0000000000000000 RCX: 0000000000000000
RDX: dffffc0000000000 RSI: 0000000000000003 RDI: 0000000000000001
RBP: ffff88806f2178a0 R08: ffff88808398e080 R09: 0000000000000002
R10: 0000000000000000 R11: ffff88808398e080 R12: ffff88808824aa08
R13: ffff88808824aa08 R14: ffff8880a12df340 R15: ffff88808824a280
___preempt_schedule+0x16/0x18
__raw_spin_unlock include/linux/spinlock_api_smp.h:152 [inline]
_raw_spin_unlock+0x41/0x50 kernel/locking/spinlock.c:184
spin_unlock include/linux/spinlock.h:357 [inline]
task_unlock include/linux/sched/task.h:138 [inline]
get_task_umask fs/proc/array.c:154 [inline]
task_state fs/proc/array.c:181 [inline]
proc_pid_status+0x1e33/0x2240 fs/proc/array.c:400
proc_single_show+0xf0/0x160 fs/proc/base.c:761
seq_read+0x51a/0x1280 fs/seq_file.c:237
do_loop_readv_writev fs/read_write.c:695 [inline]
do_loop_readv_writev fs/read_write.c:682 [inline]
do_iter_read+0x3e2/0x5b0 fs/read_write.c:919
vfs_readv+0xd3/0x130 fs/read_write.c:981
do_preadv+0x15d/0x200 fs/read_write.c:1065
SYSC_preadv fs/read_write.c:1115 [inline]
SyS_preadv+0x31/0x40 fs/read_write.c:1110
do_syscall_64+0x1e8/0x640 arch/x86/entry/common.c:292
entry_SYSCALL_64_after_hwframe+0x42/0xb7
RIP: 0033:0x45af49
RSP: 002b:00007fd129e1ac78 EFLAGS: 00000246 ORIG_RAX: 0000000000000127
RAX: ffffffffffffffda RBX: 0000000000000004 RCX: 000000000045af49
RDX: 00000000000001a8 RSI: 00000000200017c0 RDI: 0000000000000003
RBP: 000000000075bf20 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00007fd129e1b6d4
R13: 00000000004c950f R14: 00000000004e1bd0 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#status for how to communicate with syzbot.
syzbot
Feb 5, 2020, 2:33:11 AM2/5/20
to syzkaller...@googlegroups.com
syzbot has found a reproducer for the following crash on:
HEAD commit: 9fa690a2 Linux 4.14.169
git tree: linux-4.14.y
console output: https://syzkaller.appspot.com/x/log.txt?x=130f025ee00000
kernel config: https://syzkaller.appspot.com/x/.config?x=eb55b601e76e3476
C reproducer: https://syzkaller.appspot.com/x/repro.c?x=133943a5e00000
IMPORTANT: if you fix the bug, please add the following tag to the commit:
Reported-by: syzbot+c9f96b...@syzkaller.appspotmail.com
INFO: rcu_preempt self-detected stall on CPU
1-...: (1 GPs behind) idle=df2/140000000000002/0 softirq=18648/18649 fqs=1
(t=10500 jiffies g=1586 c=1585 q=2596)
rcu_preempt kthread starved for 10498 jiffies! g1586 c1585 f0x0 RCU_GP_WAIT_FQS(3) ->state=0x0 ->cpu=0
rcu_preempt R running task 29776 8 2 0x80000000
Call Trace:
context_switch kernel/sched/core.c:2808 [inline]
__schedule+0x7b8/0x1cd0 kernel/sched/core.c:3384
schedule+0x92/0x1c0 kernel/sched/core.c:3428
schedule_timeout+0x43e/0xe10 kernel/time/timer.c:1746
rcu_gp_kthread+0xbf4/0x1ec0 kernel/rcu/tree.c:2255
kthread+0x319/0x430 kernel/kthread.c:232
ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:404
NMI backtrace for cpu 1
CPU: 1 PID: 7698 Comm: syz-executor487 Not tainted 4.14.169-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
<IRQ>
__dump_stack lib/dump_stack.c:17 [inline]
dump_stack+0x142/0x197 lib/dump_stack.c:58
nmi_cpu_backtrace.cold+0x57/0x94 lib/nmi_backtrace.c:101
nmi_trigger_cpumask_backtrace+0x141/0x189 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:158 [inline]
rcu_dump_cpu_stacks+0x186/0x1d2 kernel/rcu/tree.c:1396
print_cpu_stall kernel/rcu/tree.c:1542 [inline]
check_cpu_stall kernel/rcu/tree.c:1610 [inline]
update_process_times+0x31/0x70 kernel/time/timer.c:1590
tick_sched_handle+0x85/0x160 kernel/time/tick-sched.c:165
tick_sched_timer+0x43/0x130 kernel/time/tick-sched.c:1223
RSP: 0018:ffff8880aed07b68 EFLAGS: 00000282 ORIG_RAX: ffffffffffffff10
RAX: ffff8880a95e00c0 RBX: 1ffff11015da0f74 RCX: 0000000000000007
RDX: 0000000000000100 RSI: ffff888095301948 RDI: ffff8880a8458d80
RBP: ffff8880aed07b88 R08: 000000002ac14993 R09: 0000000000000003
R10: 0000000000000000 R11: ffff8880a95e00c0 R12: ffff8880a8458d80
R13: 00000000ffffffff R14: ffff88808b8e62c0 R15: ffff8880a9e19900
__alloc_skb+0xe8/0x500 net/core/skbuff.c:212
RIP: 0010:do_fcntl+0x943/0xe10 fs/fcntl.c:347
RSP: 0018:ffff88809c87fdf0 EFLAGS: 00000296 ORIG_RAX: ffffffffffffff10
RAX: ffffffff819382d3 RBX: ffffffff816b3630 RCX: 000000007eab9e99
RDX: 1ffff1101537b9a0 RSI: ffff8880a95e0940 RDI: ffff8880a9bdccf4
RBP: ffff88809c87fea8 R08: 0000000000002057 R09: ffffffff8955fb38
R10: ffff8880a95e0940 R11: ffff8880a95e00c0 R12: 1ffff1101390ffc0
R13: ffff8880a9bdccc0 R14: 0000000000040000 R15: ffff8880a9bdccf0
SYSC_fcntl fs/fcntl.c:463 [inline]
SyS_fcntl+0xd5/0x110 fs/fcntl.c:448
do_syscall_64+0x1e8/0x640 arch/x86/entry/common.c:292
entry_SYSCALL_64_after_hwframe+0x42/0xb7
RIP: 0033:0x4486e9
RSP: 002b:00007ff6c0268db8 EFLAGS: 00000246 ORIG_RAX: 0000000000000048
RAX: ffffffffffffffda RBX: 00000000006ddc28 RCX: 00000000004486e9
RDX: 0000000000042000 RSI: 0000000000000004 RDI: 0000000000000003
RBP: 00000000006ddc20 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00000000006ddc2c
R13: 00007fff3f44bb4f R14: 00007ff6c02699c0 R15: 00000000006ddc2c
INFO: rcu_sched detected stalls on CPUs/tasks:
1-...: (1 GPs behind) idle=df2/140000000000002/0 softirq=18648/18649 fqs=2
(detected by 0, t=10551 jiffies, g=1081, c=1080, q=67)
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 PID: 7698 Comm: syz-executor487 Not tainted 4.14.169-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
task: ffff8880a95e00c0 task.stack: ffff88809c878000
RIP: 0010:llist_add_batch+0x5e/0xb0 lib/llist.c:45
RSP: 0018:ffff8880aed07558 EFLAGS: 00000046
RAX: 0000000000000000 RBX: ffff888088ba6838 RCX: 0000000000000000
RDX: 0000000000000000 RSI: ffff888088ba6838 RDI: ffff888088ba6838
RBP: ffff8880aed07588 R08: ffff8880a95e00c0 R09: 0000000000000003
R10: 0000000000000000 R11: ffff8880a95e00c0 R12: ffff888088ba6838
R13: ffffed1011174d07 R14: ffffed1015da4f19 R15: ffff8880aed278c8
FS: 00007ff6c0269700(0000) GS:ffff8880aed00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000000002000056c CR3: 000000008b9b5000 CR4: 00000000001406e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
<IRQ>
llist_add include/linux/llist.h:221 [inline]
irq_work_queue kernel/irq_work.c:102 [inline]
irq_work_queue+0x194/0x1f0 kernel/irq_work.c:87
__perf_event_overflow+0x2a8/0x330 kernel/events/core.c:7522
perf_swevent_hrtimer+0x220/0x350 kernel/events/core.c:8728
RIP: 0010:arch_local_irq_save arch/x86/include/asm/paravirt.h:796 [inline]
RIP: 0010:slab_alloc_node mm/slab.c:3302 [inline]
RIP: 0010:kmem_cache_alloc_node_trace+0x90/0x770 mm/slab.c:3659
RSP: 0018:ffff8880aed07aa0 EFLAGS: 00000286 ORIG_RAX: ffffffffffffff10
RAX: 0000000000000286 RBX: 0000000001090220 RCX: 0000000000000240
RDX: 0000000000000100 RSI: 0000000001090220 RDI: ffff8880aa800ac0
RBP: ffff8880aed07b18 R08: 0000000000000000 R09: 0000000000000003
R10: 0000000000000000 R11: ffff8880a95e00c0 R12: ffff8880aa800ac0
R13: ffff8880aa800ac0 R14: 0000000000000000 R15: 0000000001090220
__do_kmalloc_node mm/slab.c:3681 [inline]
__kmalloc_node_track_caller+0x3d/0x80 mm/slab.c:3696
RIP: 0010:do_fcntl+0x943/0xe10 fs/fcntl.c:347
RSP: 0018:ffff88809c87fdf0 EFLAGS: 00000296 ORIG_RAX: ffffffffffffff10
RAX: ffffffff819382d3 RBX: ffffffff816b3630 RCX: 000000007eab9e99
RDX: 1ffff1101537b9a0 RSI: ffff8880a95e0940 RDI: ffff8880a9bdccf4
RBP: ffff88809c87fea8 R08: 0000000000002057 R09: ffffffff8955fb38
R10: ffff8880a95e0940 R11: ffff8880a95e00c0 R12: 1ffff1101390ffc0
R13: ffff8880a9bdccc0 R14: 0000000000040000 R15: ffff8880a9bdccf0
SYSC_fcntl fs/fcntl.c:463 [inline]
SyS_fcntl+0xd5/0x110 fs/fcntl.c:448
do_syscall_64+0x1e8/0x640 arch/x86/entry/common.c:292
entry_SYSCALL_64_after_hwframe+0x42/0xb7
RIP: 0033:0x4486e9
RSP: 002b:00007ff6c0268db8 EFLAGS: 00000246 ORIG_RAX: 0000000000000048
RAX: ffffffffffffffda RBX: 00000000006ddc28 RCX: 00000000004486e9
RDX: 0000000000042000 RSI: 0000000000000004 RDI: 0000000000000003
RBP: 00000000006ddc20 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00000000006ddc2c
R13: 00007fff3f44bb4f R14: 00007ff6c02699c0 R15: 00000000006ddc2c
Code: 00 fc ff df 49 01 c6 49 01 c5 e8 7e 80 50 fe 41 80 3e 00 75 3d 41 80 7d 00 00 49 8b 17 75 3d 49 89 14 24 48 89 d0 f0 49 0f b1 1f <48> 39 c2 75 da 48 89 55 d0 e8 54 80 50 fe 48 8b 55 d0 48 85 d2
HEAD commit: 9fa690a2 Linux 4.14.169
git tree: linux-4.14.y
console output: https://syzkaller.appspot.com/x/log.txt?x=130f025ee00000
kernel config: https://syzkaller.appspot.com/x/.config?x=eb55b601e76e3476
dashboard link: https://syzkaller.appspot.com/bug?extid=c9f96b046ae341acce55
compiler: gcc (GCC) 9.0.0 20181231 (experimental)
syz repro: https://syzkaller.appspot.com/x/repro.syz?x=133c94e6e00000
compiler: gcc (GCC) 9.0.0 20181231 (experimental)
C reproducer: https://syzkaller.appspot.com/x/repro.c?x=133943a5e00000
IMPORTANT: if you fix the bug, please add the following tag to the commit:
Reported-by: syzbot+c9f96b...@syzkaller.appspotmail.com
1-...: (1 GPs behind) idle=df2/140000000000002/0 softirq=18648/18649 fqs=1
(t=10500 jiffies g=1586 c=1585 q=2596)
rcu_preempt kthread starved for 10498 jiffies! g1586 c1585 f0x0 RCU_GP_WAIT_FQS(3) ->state=0x0 ->cpu=0
rcu_preempt R running task 29776 8 2 0x80000000
Call Trace:
context_switch kernel/sched/core.c:2808 [inline]
__schedule+0x7b8/0x1cd0 kernel/sched/core.c:3384
schedule+0x92/0x1c0 kernel/sched/core.c:3428
schedule_timeout+0x43e/0xe10 kernel/time/timer.c:1746
rcu_gp_kthread+0xbf4/0x1ec0 kernel/rcu/tree.c:2255
kthread+0x319/0x430 kernel/kthread.c:232
ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:404
NMI backtrace for cpu 1
CPU: 1 PID: 7698 Comm: syz-executor487 Not tainted 4.14.169-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
<IRQ>
__dump_stack lib/dump_stack.c:17 [inline]
dump_stack+0x142/0x197 lib/dump_stack.c:58
nmi_cpu_backtrace.cold+0x57/0x94 lib/nmi_backtrace.c:101
nmi_trigger_cpumask_backtrace+0x141/0x189 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:158 [inline]
rcu_dump_cpu_stacks+0x186/0x1d2 kernel/rcu/tree.c:1396
print_cpu_stall kernel/rcu/tree.c:1542 [inline]
check_cpu_stall kernel/rcu/tree.c:1610 [inline]
__rcu_pending kernel/rcu/tree.c:3390 [inline]
rcu_pending kernel/rcu/tree.c:3452 [inline]
rcu_check_callbacks.cold+0x43d/0xd0a kernel/rcu/tree.c:2792
rcu_pending kernel/rcu/tree.c:3452 [inline]
update_process_times+0x31/0x70 kernel/time/timer.c:1590
tick_sched_handle+0x85/0x160 kernel/time/tick-sched.c:165
tick_sched_timer+0x43/0x130 kernel/time/tick-sched.c:1223
__run_hrtimer kernel/time/hrtimer.c:1223 [inline]
__hrtimer_run_queues+0x270/0xbc0 kernel/time/hrtimer.c:1287
hrtimer_interrupt+0x1d8/0x5d0 kernel/time/hrtimer.c:1321
local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1075 [inline]
smp_apic_timer_interrupt+0x11c/0x5e0 arch/x86/kernel/apic/apic.c:1100
apic_timer_interrupt+0x96/0xa0 arch/x86/entry/entry_64.S:792
RIP: 0010:__phys_addr+0x1/0xe0 arch/x86/mm/physaddr.c:15
__hrtimer_run_queues+0x270/0xbc0 kernel/time/hrtimer.c:1287
hrtimer_interrupt+0x1d8/0x5d0 kernel/time/hrtimer.c:1321
local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1075 [inline]
smp_apic_timer_interrupt+0x11c/0x5e0 arch/x86/kernel/apic/apic.c:1100
apic_timer_interrupt+0x96/0xa0 arch/x86/entry/entry_64.S:792
RSP: 0018:ffff8880aed07b68 EFLAGS: 00000282 ORIG_RAX: ffffffffffffff10
RAX: ffff8880a95e00c0 RBX: 1ffff11015da0f74 RCX: 0000000000000007
RDX: 0000000000000100 RSI: ffff888095301948 RDI: ffff8880a8458d80
RBP: ffff8880aed07b88 R08: 000000002ac14993 R09: 0000000000000003
R10: 0000000000000000 R11: ffff8880a95e00c0 R12: ffff8880a8458d80
R13: 00000000ffffffff R14: ffff88808b8e62c0 R15: ffff8880a9e19900
__alloc_skb+0xe8/0x500 net/core/skbuff.c:212
alloc_skb include/linux/skbuff.h:980 [inline]
new_skb+0x28/0x1d0 drivers/block/aoe/aoecmd.c:67
aoecmd_cfg_pkts drivers/block/aoe/aoecmd.c:427 [inline]
aoecmd_cfg+0x180/0x5c0 drivers/block/aoe/aoecmd.c:1392
discover_timer drivers/block/aoe/aoemain.c:44 [inline]
discover_timer+0xcd/0x170 drivers/block/aoe/aoemain.c:21
call_timer_fn+0x161/0x670 kernel/time/timer.c:1279
expire_timers kernel/time/timer.c:1318 [inline]
__run_timers kernel/time/timer.c:1636 [inline]
__run_timers kernel/time/timer.c:1604 [inline]
run_timer_softirq+0x5b7/0x1520 kernel/time/timer.c:1649
__do_softirq+0x244/0x9a0 kernel/softirq.c:288
invoke_softirq kernel/softirq.c:368 [inline]
irq_exit+0x160/0x1b0 kernel/softirq.c:409
exiting_irq arch/x86/include/asm/apic.h:648 [inline]
smp_apic_timer_interrupt+0x146/0x5e0 arch/x86/kernel/apic/apic.c:1102
apic_timer_interrupt+0x96/0xa0 arch/x86/entry/entry_64.S:792
</IRQ>
RIP: 0010:setfl fs/fcntl.c:80 [inline]
new_skb+0x28/0x1d0 drivers/block/aoe/aoecmd.c:67
aoecmd_cfg_pkts drivers/block/aoe/aoecmd.c:427 [inline]
aoecmd_cfg+0x180/0x5c0 drivers/block/aoe/aoecmd.c:1392
discover_timer drivers/block/aoe/aoemain.c:44 [inline]
discover_timer+0xcd/0x170 drivers/block/aoe/aoemain.c:21
call_timer_fn+0x161/0x670 kernel/time/timer.c:1279
expire_timers kernel/time/timer.c:1318 [inline]
__run_timers kernel/time/timer.c:1636 [inline]
__run_timers kernel/time/timer.c:1604 [inline]
run_timer_softirq+0x5b7/0x1520 kernel/time/timer.c:1649
__do_softirq+0x244/0x9a0 kernel/softirq.c:288
invoke_softirq kernel/softirq.c:368 [inline]
irq_exit+0x160/0x1b0 kernel/softirq.c:409
exiting_irq arch/x86/include/asm/apic.h:648 [inline]
smp_apic_timer_interrupt+0x146/0x5e0 arch/x86/kernel/apic/apic.c:1102
apic_timer_interrupt+0x96/0xa0 arch/x86/entry/entry_64.S:792
</IRQ>
RIP: 0010:do_fcntl+0x943/0xe10 fs/fcntl.c:347
RSP: 0018:ffff88809c87fdf0 EFLAGS: 00000296 ORIG_RAX: ffffffffffffff10
RAX: ffffffff819382d3 RBX: ffffffff816b3630 RCX: 000000007eab9e99
RDX: 1ffff1101537b9a0 RSI: ffff8880a95e0940 RDI: ffff8880a9bdccf4
RBP: ffff88809c87fea8 R08: 0000000000002057 R09: ffffffff8955fb38
R10: ffff8880a95e0940 R11: ffff8880a95e00c0 R12: 1ffff1101390ffc0
R13: ffff8880a9bdccc0 R14: 0000000000040000 R15: ffff8880a9bdccf0
SYSC_fcntl fs/fcntl.c:463 [inline]
SyS_fcntl+0xd5/0x110 fs/fcntl.c:448
do_syscall_64+0x1e8/0x640 arch/x86/entry/common.c:292
entry_SYSCALL_64_after_hwframe+0x42/0xb7
RIP: 0033:0x4486e9
RSP: 002b:00007ff6c0268db8 EFLAGS: 00000246 ORIG_RAX: 0000000000000048
RAX: ffffffffffffffda RBX: 00000000006ddc28 RCX: 00000000004486e9
RDX: 0000000000042000 RSI: 0000000000000004 RDI: 0000000000000003
RBP: 00000000006ddc20 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00000000006ddc2c
R13: 00007fff3f44bb4f R14: 00007ff6c02699c0 R15: 00000000006ddc2c
INFO: rcu_sched detected stalls on CPUs/tasks:
1-...: (1 GPs behind) idle=df2/140000000000002/0 softirq=18648/18649 fqs=2
(detected by 0, t=10551 jiffies, g=1081, c=1080, q=67)
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 PID: 7698 Comm: syz-executor487 Not tainted 4.14.169-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
task: ffff8880a95e00c0 task.stack: ffff88809c878000
RIP: 0010:llist_add_batch+0x5e/0xb0 lib/llist.c:45
RSP: 0018:ffff8880aed07558 EFLAGS: 00000046
RAX: 0000000000000000 RBX: ffff888088ba6838 RCX: 0000000000000000
RDX: 0000000000000000 RSI: ffff888088ba6838 RDI: ffff888088ba6838
RBP: ffff8880aed07588 R08: ffff8880a95e00c0 R09: 0000000000000003
R10: 0000000000000000 R11: ffff8880a95e00c0 R12: ffff888088ba6838
R13: ffffed1011174d07 R14: ffffed1015da4f19 R15: ffff8880aed278c8
FS: 00007ff6c0269700(0000) GS:ffff8880aed00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000000002000056c CR3: 000000008b9b5000 CR4: 00000000001406e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
<IRQ>
llist_add include/linux/llist.h:221 [inline]
irq_work_queue kernel/irq_work.c:102 [inline]
irq_work_queue+0x194/0x1f0 kernel/irq_work.c:87
__perf_event_overflow+0x2a8/0x330 kernel/events/core.c:7522
perf_swevent_hrtimer+0x220/0x350 kernel/events/core.c:8728
__run_hrtimer kernel/time/hrtimer.c:1223 [inline]
__hrtimer_run_queues+0x270/0xbc0 kernel/time/hrtimer.c:1287
hrtimer_interrupt+0x1d8/0x5d0 kernel/time/hrtimer.c:1321
local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1075 [inline]
smp_apic_timer_interrupt+0x11c/0x5e0 arch/x86/kernel/apic/apic.c:1100
apic_timer_interrupt+0x96/0xa0 arch/x86/entry/entry_64.S:792
RIP: 0010:arch_local_save_flags arch/x86/include/asm/paravirt.h:774 [inline]
__hrtimer_run_queues+0x270/0xbc0 kernel/time/hrtimer.c:1287
hrtimer_interrupt+0x1d8/0x5d0 kernel/time/hrtimer.c:1321
local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1075 [inline]
smp_apic_timer_interrupt+0x11c/0x5e0 arch/x86/kernel/apic/apic.c:1100
apic_timer_interrupt+0x96/0xa0 arch/x86/entry/entry_64.S:792
RIP: 0010:arch_local_irq_save arch/x86/include/asm/paravirt.h:796 [inline]
RIP: 0010:slab_alloc_node mm/slab.c:3302 [inline]
RIP: 0010:kmem_cache_alloc_node_trace+0x90/0x770 mm/slab.c:3659
RSP: 0018:ffff8880aed07aa0 EFLAGS: 00000286 ORIG_RAX: ffffffffffffff10
RAX: 0000000000000286 RBX: 0000000001090220 RCX: 0000000000000240
RDX: 0000000000000100 RSI: 0000000001090220 RDI: ffff8880aa800ac0
RBP: ffff8880aed07b18 R08: 0000000000000000 R09: 0000000000000003
R10: 0000000000000000 R11: ffff8880a95e00c0 R12: ffff8880aa800ac0
R13: ffff8880aa800ac0 R14: 0000000000000000 R15: 0000000001090220
__do_kmalloc_node mm/slab.c:3681 [inline]
__kmalloc_node_track_caller+0x3d/0x80 mm/slab.c:3696
__kmalloc_reserve.isra.0+0x40/0xe0 net/core/skbuff.c:137
__alloc_skb+0xcf/0x500 net/core/skbuff.c:205
alloc_skb include/linux/skbuff.h:980 [inline]
new_skb+0x28/0x1d0 drivers/block/aoe/aoecmd.c:67
aoecmd_cfg_pkts drivers/block/aoe/aoecmd.c:427 [inline]
aoecmd_cfg+0x180/0x5c0 drivers/block/aoe/aoecmd.c:1392
discover_timer drivers/block/aoe/aoemain.c:44 [inline]
discover_timer+0xcd/0x170 drivers/block/aoe/aoemain.c:21
call_timer_fn+0x161/0x670 kernel/time/timer.c:1279
expire_timers kernel/time/timer.c:1318 [inline]
__run_timers kernel/time/timer.c:1636 [inline]
__run_timers kernel/time/timer.c:1604 [inline]
run_timer_softirq+0x5b7/0x1520 kernel/time/timer.c:1649
__do_softirq+0x244/0x9a0 kernel/softirq.c:288
invoke_softirq kernel/softirq.c:368 [inline]
irq_exit+0x160/0x1b0 kernel/softirq.c:409
exiting_irq arch/x86/include/asm/apic.h:648 [inline]
smp_apic_timer_interrupt+0x146/0x5e0 arch/x86/kernel/apic/apic.c:1102
apic_timer_interrupt+0x96/0xa0 arch/x86/entry/entry_64.S:792
</IRQ>
RIP: 0010:setfl fs/fcntl.c:80 [inline]
__alloc_skb+0xcf/0x500 net/core/skbuff.c:205
alloc_skb include/linux/skbuff.h:980 [inline]
new_skb+0x28/0x1d0 drivers/block/aoe/aoecmd.c:67
aoecmd_cfg_pkts drivers/block/aoe/aoecmd.c:427 [inline]
aoecmd_cfg+0x180/0x5c0 drivers/block/aoe/aoecmd.c:1392
discover_timer drivers/block/aoe/aoemain.c:44 [inline]
discover_timer+0xcd/0x170 drivers/block/aoe/aoemain.c:21
call_timer_fn+0x161/0x670 kernel/time/timer.c:1279
expire_timers kernel/time/timer.c:1318 [inline]
__run_timers kernel/time/timer.c:1636 [inline]
__run_timers kernel/time/timer.c:1604 [inline]
run_timer_softirq+0x5b7/0x1520 kernel/time/timer.c:1649
__do_softirq+0x244/0x9a0 kernel/softirq.c:288
invoke_softirq kernel/softirq.c:368 [inline]
irq_exit+0x160/0x1b0 kernel/softirq.c:409
exiting_irq arch/x86/include/asm/apic.h:648 [inline]
smp_apic_timer_interrupt+0x146/0x5e0 arch/x86/kernel/apic/apic.c:1102
apic_timer_interrupt+0x96/0xa0 arch/x86/entry/entry_64.S:792
</IRQ>
RIP: 0010:do_fcntl+0x943/0xe10 fs/fcntl.c:347
RSP: 0018:ffff88809c87fdf0 EFLAGS: 00000296 ORIG_RAX: ffffffffffffff10
RAX: ffffffff819382d3 RBX: ffffffff816b3630 RCX: 000000007eab9e99
RDX: 1ffff1101537b9a0 RSI: ffff8880a95e0940 RDI: ffff8880a9bdccf4
RBP: ffff88809c87fea8 R08: 0000000000002057 R09: ffffffff8955fb38
R10: ffff8880a95e0940 R11: ffff8880a95e00c0 R12: 1ffff1101390ffc0
R13: ffff8880a9bdccc0 R14: 0000000000040000 R15: ffff8880a9bdccf0
SYSC_fcntl fs/fcntl.c:463 [inline]
SyS_fcntl+0xd5/0x110 fs/fcntl.c:448
do_syscall_64+0x1e8/0x640 arch/x86/entry/common.c:292
entry_SYSCALL_64_after_hwframe+0x42/0xb7
RIP: 0033:0x4486e9
RSP: 002b:00007ff6c0268db8 EFLAGS: 00000246 ORIG_RAX: 0000000000000048
RAX: ffffffffffffffda RBX: 00000000006ddc28 RCX: 00000000004486e9
RDX: 0000000000042000 RSI: 0000000000000004 RDI: 0000000000000003
RBP: 00000000006ddc20 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00000000006ddc2c
R13: 00007fff3f44bb4f R14: 00007ff6c02699c0 R15: 00000000006ddc2c
Code: 00 fc ff df 49 01 c6 49 01 c5 e8 7e 80 50 fe 41 80 3e 00 75 3d 41 80 7d 00 00 49 8b 17 75 3d 49 89 14 24 48 89 d0 f0 49 0f b1 1f <48> 39 c2 75 da 48 89 55 d0 e8 54 80 50 fe 48 8b 55 d0 48 85 d2
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