syzbot


INFO: rcu detected stall in __netif_receive_skb_core

Status: auto-closed as invalid on 2020/08/20 02:51
Reported-by: syzbot+0cf0275f3ea4d56cdab2@syzkaller.appspotmail.com
First crash: 806d, last: 806d
similar bugs (1):
Kernel Title Repro Cause bisect Fix bisect Count Last Reported Patched Status
upstream INFO: rcu detected stall in __netif_receive_skb_core 1 305d 305d 0/22 auto-closed as invalid on 2021/12/03 17:24

Sample crash report:
kvm: pic: level sensitive irq not supported
INFO: rcu_preempt detected stalls on CPUs/tasks:
	(detected by 1, t=10502 jiffies, g=15868, c=15867, q=158)
All QSes seen, last rcu_preempt kthread activity 10502 (4295010529-4295000027), jiffies_till_next_fqs=1, root ->qsmask 0x0
syz-executor.5  R  running task    27968 28280   6370 0x0000000c
Call Trace:
 <IRQ>
 sched_show_task kernel/sched/core.c:5168 [inline]
 sched_show_task.cold+0x2e3/0x347 kernel/sched/core.c:5143
 print_other_cpu_stall kernel/rcu/tree.c:1501 [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+0xd3f/0xdaa kernel/rcu/tree.c:2792
 update_process_times+0x29/0x60 kernel/time/timer.c:1590
 tick_sched_handle+0x7d/0x150 kernel/time/tick-sched.c:165
 tick_sched_timer+0x3e/0x120 kernel/time/tick-sched.c:1223
 __run_hrtimer kernel/time/hrtimer.c:1223 [inline]
 __hrtimer_run_queues+0x25c/0xbb0 kernel/time/hrtimer.c:1287
 hrtimer_interrupt+0x1e6/0x5e0 kernel/time/hrtimer.c:1321
 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1075 [inline]
 smp_apic_timer_interrupt+0x117/0x5e0 arch/x86/kernel/apic/apic.c:1100
 apic_timer_interrupt+0x8f/0xa0 arch/x86/entry/entry_64.S:792
RIP: 0010:__netif_receive_skb_core+0x11f8/0x2c00 net/core/dev.c:4386
RSP: 0018:ffff8880aeb07c40 EFLAGS: 00000206 ORIG_RAX: ffffffffffffff10
RAX: ffffffff889293f0 RBX: dffffc0000000000 RCX: 0000000000000000
RDX: 0000000000000100 RSI: ffffffff87386c80 RDI: ffff88809416c153
RBP: ffff8880aeb07d80 R08: 0000000000000000 R09: 0000000000022012
R10: ffff8880aeb07d98 R11: ffff88805abd05c0 R12: 0000000000000000
R13: ffff88809416c0c0 R14: 0000000000000001 R15: ffff8880aeb2c690
 __netif_receive_skb+0x27/0x1a0 net/core/dev.c:4515
 process_backlog+0x214/0x750 net/core/dev.c:5197
 napi_poll net/core/dev.c:5598 [inline]
 net_rx_action+0x456/0xe90 net/core/dev.c:5664
 __do_softirq+0x254/0x9bf kernel/softirq.c:288
 invoke_softirq kernel/softirq.c:368 [inline]
 irq_exit+0x15b/0x1a0 kernel/softirq.c:409
 exiting_irq arch/x86/include/asm/apic.h:648 [inline]
 smp_apic_timer_interrupt+0x141/0x5e0 arch/x86/kernel/apic/apic.c:1102
 apic_timer_interrupt+0x8f/0xa0 arch/x86/entry/entry_64.S:792
 </IRQ>
RIP: 0010:copy_pte_range mm/memory.c:1102 [inline]
RIP: 0010:copy_pmd_range mm/memory.c:1157 [inline]
RIP: 0010:copy_pud_range mm/memory.c:1191 [inline]
RIP: 0010:copy_p4d_range mm/memory.c:1213 [inline]
RIP: 0010:copy_page_range+0xa4a/0x1d70 mm/memory.c:1275
RSP: 0018:ffff88802659fab0 EFLAGS: 00000246 ORIG_RAX: ffffffffffffff10
RAX: 1ffff110150d7c4c RBX: ffffea0002a1af80 RCX: ffffc90005b6a000
RDX: 0000000000040000 RSI: ffffffff8179fbfe RDI: ffff88805760073c
RBP: 0000000000000000 R08: 0000000000002790 R09: ffffffff8a070500
R10: ffff88805abd0ee0 R11: ffff88805abd05c0 R12: dffffc0000000000
R13: ffff8880a86be260 R14: 0000000000000000 R15: 00007f71e644c000
 dup_mmap kernel/fork.c:709 [inline]
 dup_mm kernel/fork.c:1199 [inline]
 copy_mm kernel/fork.c:1254 [inline]
 copy_process.part.0+0x4884/0x6a70 kernel/fork.c:1771
 copy_process kernel/fork.c:1586 [inline]
 _do_fork+0x180/0xc80 kernel/fork.c:2070
 do_syscall_64+0x1d5/0x640 arch/x86/entry/common.c:292
 entry_SYSCALL_64_after_hwframe+0x42/0xb7
RIP: 0033:0x45c829
RSP: 002b:00007f71e5733c78 EFLAGS: 00000246 ORIG_RAX: 0000000000000038
RAX: ffffffffffffffda RBX: 00000000004da840 RCX: 000000000045c829
RDX: 9999999999999999 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 000000000078bf00 R08: ffffffffffffffff R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00000000ffffffff
R13: 0000000000000076 R14: 00000000004c311e R15: 00007f71e57346d4
rcu_preempt kthread starved for 10502 jiffies! g15868 c15867 f0x2 RCU_GP_WAIT_FQS(3) ->state=0x0 ->cpu=0
rcu_preempt     R  running task    29920     8      2 0x80000000
Call Trace:
 schedule+0x8d/0x1b0 kernel/sched/core.c:3428
 schedule_timeout+0x43c/0xe40 kernel/time/timer.c:1746
 rcu_gp_kthread+0xb8e/0x1ce0 kernel/rcu/tree.c:2255
 kthread+0x30d/0x420 kernel/kthread.c:232
 ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:404

Crashes (1):
Manager Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Title
ci2-linux-4-14 2020/04/22 02:50 linux-4.14.y c10b57a567e4 2e44d63e .config log report