syzbot


INFO: rcu detected stall in ip_rcv (4)

Status: auto-closed as invalid on 2022/07/25 09:18
Reported-by: syzbot+@syzkaller.appspotmail.com
First crash: 285d, last: 214d
similar bugs (8):
Kernel Title Repro Cause bisect Fix bisect Count Last Reported Patched Status
linux-4.19 BUG: soft lockup in ip_rcv C error 15 196d 571d 0/1 upstream: reported C repro on 2021/05/04 03:32
upstream INFO: rcu detected stall in ip_rcv 2 1218d 1381d 0/24 auto-closed as invalid on 2019/10/25 14:11
upstream INFO: rcu detected stall in ip_rcv (2) 1 725d 725d 0/24 auto-closed as invalid on 2021/03/01 14:28
linux-4.14 INFO: rcu detected stall in ip_rcv (2) 1 735d 735d 0/1 auto-closed as invalid on 2021/03/20 21:11
upstream INFO: rcu detected stall in ip_rcv (3) 1 587d 587d 0/24 auto-closed as invalid on 2021/07/17 18:11
linux-4.14 INFO: rcu detected stall in ip_rcv 3 916d 935d 0/1 auto-closed as invalid on 2020/09/21 12:55
linux-4.14 BUG: soft lockup in ip_rcv (2) 1 608d 608d 0/1 auto-closed as invalid on 2021/07/26 15:49
linux-4.14 BUG: soft lockup in ip_rcv (3) C error 4 83d 203d 0/1 upstream: reported C repro on 2022/05/07 10:08

Sample crash report:
rcu: INFO: rcu_preempt self-detected stall on CPU
rcu: 	0-...!: (1 GPs behind) idle=0a9/1/0x4000000000000000 softirq=195648/195649 fqs=5 
	(t=10502 jiffies g=317861 q=10)
rcu: rcu_preempt kthread timer wakeup didn't happen for 10492 jiffies! g317861 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x402
rcu: 	Possible timer handling issue on cpu=1 timer-softirq=255047
rcu: rcu_preempt kthread starved for 10495 jiffies! g317861 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:28880 pid:   14 ppid:     2 flags:0x00004000
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:4987 [inline]
 __schedule+0xa94/0x4910 kernel/sched/core.c:6296
 schedule+0xd2/0x260 kernel/sched/core.c:6369
 schedule_timeout+0x14a/0x2a0 kernel/time/timer.c:1881
 rcu_gp_fqs_loop+0x186/0x810 kernel/rcu/tree.c:1963
 rcu_gp_kthread+0x1de/0x320 kernel/rcu/tree.c:2136
 kthread+0x2e9/0x3a0 kernel/kthread.c:377
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295
 </TASK>
rcu: Stack dump where RCU GP kthread last ran:
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 PID: 688 Comm: syz-executor.3 Not tainted 5.17.0-rc3-syzkaller-00334-gc5d714aa6dce #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
RIP: 0010:kvm_wait+0x98/0x100 arch/x86/kernel/kvm.c:1001
Code: fa 83 e2 07 38 d0 7f 04 84 c0 75 63 0f b6 07 40 38 c6 74 35 48 83 c4 10 c3 c3 e8 b3 2d 4a 00 eb 07 0f 00 2d ca 5a 75 08 fb f4 <48> 83 c4 10 c3 89 74 24 0c 48 89 3c 24 e8 56 2f 4a 00 8b 74 24 0c
RSP: 0018:ffffc90004c87838 EFLAGS: 00000206
RAX: 000000000000ac48 RBX: 0000000000000000 RCX: 1ffffffff2001eee
RDX: 0000000000000000 RSI: 0000000000000201 RDI: 0000000000000000
RBP: ffff88805036a4d8 R08: 0000000000000001 R09: ffffffff8ffc6a07
R10: 0000000000000001 R11: 0000000000000000 R12: 0000000000000000
R13: ffffed100a06d49b R14: 0000000000000001 R15: ffff8880b9d3ab00
FS:  00007fb97ce8b700(0000) GS:ffff8880b9d00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000001b2e22e000 CR3: 000000007cbd6000 CR4: 00000000003506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 pv_wait arch/x86/include/asm/paravirt.h:603 [inline]
 pv_wait_head_or_lock kernel/locking/qspinlock_paravirt.h:470 [inline]
 __pv_queued_spin_lock_slowpath+0x8b8/0xb40 kernel/locking/qspinlock.c:508
 pv_queued_spin_lock_slowpath arch/x86/include/asm/paravirt.h:591 [inline]
 queued_spin_lock_slowpath arch/x86/include/asm/qspinlock.h:51 [inline]
 queued_spin_lock include/asm-generic/qspinlock.h:85 [inline]
 do_raw_spin_lock+0x200/0x2b0 kernel/locking/spinlock_debug.c:115
 spin_lock_bh include/linux/spinlock.h:354 [inline]
 lock_sock_nested+0x5b/0xf0 net/core/sock.c:3299
 lock_sock include/net/sock.h:1668 [inline]
 sk_stream_wait_memory+0x87d/0xed0 net/core/stream.c:145
 tcp_sendmsg_locked+0x7cc/0x2e20 net/ipv4/tcp.c:1411
 tcp_sendmsg+0x2b/0x40 net/ipv4/tcp.c:1449
 inet_sendmsg+0x99/0xe0 net/ipv4/af_inet.c:819
 sock_sendmsg_nosec net/socket.c:705 [inline]
 sock_sendmsg+0xcf/0x120 net/socket.c:725
 __sys_sendto+0x21c/0x320 net/socket.c:2040
 __do_sys_sendto net/socket.c:2052 [inline]
 __se_sys_sendto net/socket.c:2048 [inline]
 __x64_sys_sendto+0xdd/0x1b0 net/socket.c:2048
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x44/0xae
RIP: 0033:0x7fb97e516059
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 b8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007fb97ce8b168 EFLAGS: 00000246 ORIG_RAX: 000000000000002c
RAX: ffffffffffffffda RBX: 00007fb97e628f60 RCX: 00007fb97e516059
RDX: 00000000ffffff1f RSI: 00000000200000c0 RDI: 0000000000000003
RBP: 00007fb97e57008d R08: 0000000000000000 R09: 0300000080305551
R10: 0000000000004001 R11: 0000000000000246 R12: 0000000000000000
R13: 00007ffd4b35c4ff R14: 00007fb97ce8b300 R15: 0000000000022000
 </TASK>
NMI backtrace for cpu 0
CPU: 0 PID: 13 Comm: ksoftirqd/0 Not tainted 5.17.0-rc3-syzkaller-00334-gc5d714aa6dce #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
 <IRQ>
 __dump_stack lib/dump_stack.c:88 [inline]
 dump_stack_lvl+0xcd/0x134 lib/dump_stack.c:106
 nmi_cpu_backtrace.cold+0x47/0x144 lib/nmi_backtrace.c:111
 nmi_trigger_cpumask_backtrace+0x1e6/0x230 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:604 [inline]
 check_cpu_stall kernel/rcu/tree_stall.h:688 [inline]
 rcu_pending kernel/rcu/tree.c:3919 [inline]
 rcu_sched_clock_irq.cold+0x402/0x755 kernel/rcu/tree.c:2617
 update_process_times+0x16d/0x200 kernel/time/timer.c:1785
 tick_sched_handle+0x9b/0x180 kernel/time/tick-sched.c:226
 tick_sched_timer+0x1b0/0x2d0 kernel/time/tick-sched.c:1428
 __run_hrtimer kernel/time/hrtimer.c:1685 [inline]
 __hrtimer_run_queues+0x1c0/0xe50 kernel/time/hrtimer.c:1749
 hrtimer_interrupt+0x31c/0x790 kernel/time/hrtimer.c:1811
 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1086 [inline]
 __sysvec_apic_timer_interrupt+0x146/0x530 arch/x86/kernel/apic/apic.c:1103
 sysvec_apic_timer_interrupt+0x8e/0xc0 arch/x86/kernel/apic/apic.c:1097
 </IRQ>
 <TASK>
 asm_sysvec_apic_timer_interrupt+0x12/0x20 arch/x86/include/asm/idtentry.h:638
RIP: 0010:prefetchw arch/x86/include/asm/processor.h:741 [inline]
RIP: 0010:slab_alloc mm/slab.c:3311 [inline]
RIP: 0010:kmem_cache_alloc+0x195/0x560 mm/slab.c:3499
Code: 0f 84 a2 01 00 00 4d 85 f6 4c 89 7c 24 08 0f 85 39 02 00 00 9c 58 f6 c4 02 0f 85 b1 02 00 00 4d 85 f6 74 01 fb 48 8b 74 24 08 <0f> 0d 0e 0f 1f 44 00 00 48 83 7b 50 00 0f 84 8e 00 00 00 44 23 25
RSP: 0018:ffffc90000f3f4a0 EFLAGS: 00000206
RAX: 0000000000000012 RBX: ffff8881400a2e00 RCX: 1ffffffff2002656
RDX: 0000000000000000 RSI: ffff8881a33fe580 RDI: 0000000000000000
RBP: 0000000000000000 R08: 0000000000000001 R09: ffffffff8ffc6a0f
R10: 0000000000000001 R11: 0000000000000001 R12: 0000000000000a20
R13: 0000000000000a20 R14: 0000000000000200 R15: ffff8881a33fe580
 skb_clone+0x170/0x3c0 net/core/skbuff.c:1519
 sk_psock_verdict_recv+0x72/0x780 net/core/skmsg.c:1159
 tcp_read_sock+0x1f8/0x580 net/ipv4/tcp.c:1682
 sk_psock_verdict_data_ready+0x11a/0x180 net/core/skmsg.c:1202
 tcp_data_ready+0x106/0x540 net/ipv4/tcp_input.c:4979
 tcp_data_queue+0x23ee/0x4bb0 net/ipv4/tcp_input.c:5049
 tcp_rcv_established+0x81e/0x1ff0 net/ipv4/tcp_input.c:5947
 tcp_v4_do_rcv+0x65e/0x980 net/ipv4/tcp_ipv4.c:1719
 tcp_v4_rcv+0x27d7/0x3170 net/ipv4/tcp_ipv4.c:2119
 ip_protocol_deliver_rcu+0xa3/0xf30 net/ipv4/ip_input.c:204
 ip_local_deliver_finish+0x20a/0x370 net/ipv4/ip_input.c:231
 NF_HOOK include/linux/netfilter.h:307 [inline]
 NF_HOOK include/linux/netfilter.h:301 [inline]
 ip_local_deliver+0x1b3/0x200 net/ipv4/ip_input.c:252
 dst_input include/net/dst.h:461 [inline]
 ip_rcv_finish+0x1cb/0x2f0 net/ipv4/ip_input.c:429
 NF_HOOK include/linux/netfilter.h:307 [inline]
 NF_HOOK include/linux/netfilter.h:301 [inline]
 ip_rcv+0xaa/0xd0 net/ipv4/ip_input.c:540
 __netif_receive_skb_one_core+0x114/0x180 net/core/dev.c:5351
 __netif_receive_skb+0x24/0x1b0 net/core/dev.c:5465
 process_backlog+0x2a5/0x6c0 net/core/dev.c:5797
 __napi_poll+0xb3/0x6e0 net/core/dev.c:6365
 napi_poll net/core/dev.c:6432 [inline]
 net_rx_action+0x801/0xb40 net/core/dev.c:6519
 __do_softirq+0x29b/0x9c2 kernel/softirq.c:558
 run_ksoftirqd kernel/softirq.c:921 [inline]
 run_ksoftirqd+0x2d/0x60 kernel/softirq.c:913
 smpboot_thread_fn+0x645/0x9c0 kernel/smpboot.c:164
 kthread+0x2e9/0x3a0 kernel/kthread.c:377
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295
 </TASK>
----------------
Code disassembly (best guess):
   0:	fa                   	cli
   1:	83 e2 07             	and    $0x7,%edx
   4:	38 d0                	cmp    %dl,%al
   6:	7f 04                	jg     0xc
   8:	84 c0                	test   %al,%al
   a:	75 63                	jne    0x6f
   c:	0f b6 07             	movzbl (%rdi),%eax
   f:	40 38 c6             	cmp    %al,%sil
  12:	74 35                	je     0x49
  14:	48 83 c4 10          	add    $0x10,%rsp
  18:	c3                   	retq
  19:	c3                   	retq
  1a:	e8 b3 2d 4a 00       	callq  0x4a2dd2
  1f:	eb 07                	jmp    0x28
  21:	0f 00 2d ca 5a 75 08 	verw   0x8755aca(%rip)        # 0x8755af2
  28:	fb                   	sti
  29:	f4                   	hlt
* 2a:	48 83 c4 10          	add    $0x10,%rsp <-- trapping instruction
  2e:	c3                   	retq
  2f:	89 74 24 0c          	mov    %esi,0xc(%rsp)
  33:	48 89 3c 24          	mov    %rdi,(%rsp)
  37:	e8 56 2f 4a 00       	callq  0x4a2f92
  3c:	8b 74 24 0c          	mov    0xc(%rsp),%esi

Crashes (12):
Manager Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Title
ci-upstream-kasan-gce-selinux-root 2022/02/14 09:46 upstream c5d714aa6dce 8b9ca619 .config log report info INFO: rcu detected stall in ip_rcv
ci-upstream-net-kasan-gce 2022/03/02 00:38 net-next 1e385c08249e 45a13a73 .config log report info INFO: rcu detected stall in ip_rcv
ci-upstream-net-kasan-gce 2022/03/01 09:10 net-next f2b77012ddd5 45a13a73 .config log report info INFO: rcu detected stall in ip_rcv
ci-upstream-linux-next-kasan-gce-root 2022/04/26 09:11 linux-next e7d6987e09a3 1fa34c1b .config log report info INFO: rcu detected stall in ip_rcv
ci-upstream-linux-next-kasan-gce-root 2022/04/26 08:15 linux-next e7d6987e09a3 1fa34c1b .config log report info INFO: rcu detected stall in ip_rcv
ci-upstream-linux-next-kasan-gce-root 2022/04/26 03:18 linux-next e7d6987e09a3 152baedd .config log report info INFO: rcu detected stall in ip_rcv
ci-upstream-linux-next-kasan-gce-root 2022/04/26 00:57 linux-next e7d6987e09a3 152baedd .config log report info INFO: rcu detected stall in ip_rcv
ci-upstream-linux-next-kasan-gce-root 2022/04/25 22:13 linux-next e7d6987e09a3 152baedd .config log report info INFO: rcu detected stall in ip_rcv
ci-upstream-linux-next-kasan-gce-root 2022/04/25 22:04 linux-next e7d6987e09a3 152baedd .config log report info INFO: rcu detected stall in ip_rcv
ci-upstream-linux-next-kasan-gce-root 2022/04/25 20:41 linux-next e7d6987e09a3 152baedd .config log report info INFO: rcu detected stall in ip_rcv
ci-upstream-linux-next-kasan-gce-root 2022/04/25 20:20 linux-next e7d6987e09a3 152baedd .config log report info INFO: rcu detected stall in ip_rcv
ci-upstream-linux-next-kasan-gce-root 2022/02/22 17:29 linux-next ef6b35306dd8 6e821dbf .config log report info INFO: rcu detected stall in ip_rcv
* Struck through repros no longer work on HEAD.