Messages in this thread | | | From | Dmitry Vyukov <> | Date | Mon, 12 Feb 2018 16:26:12 +0100 | Subject | Re: INFO: rcu detected stall in _decode_session6 |
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On Mon, Feb 12, 2018 at 4:23 PM, syzbot <syzbot+24d1c14022d23c04a83e@syzkaller.appspotmail.com> wrote: > Hello, > > syzbot hit the following crash on net-next commit > d0adb51edb73c94a595bfa9d9bd8b35977e74fbf > > Unfortunately, I don't have any reproducer for this crash yet. > Raw console output is attached. > compiler: gcc (GCC) 7.1.1 20170620 > .config is attached.
+xfrm maintainers
#syz dup: INFO: rcu detected stall in __xfrm_decode_session
> IMPORTANT: if you fix the bug, please add the following tag to the commit: > Reported-by: syzbot+24d1c14022d23c04a83e@syzkaller.appspotmail.com > It will help syzbot understand when the bug is fixed. See footer for > details. > If you forward the report, please keep this part and the footer. > > INFO: rcu_sched self-detected stall on CPU > 1-....: (1 GPs behind) idle=41e/140000000000001/0 > softirq=91762/91764 fqs=31218 > (t=125000 jiffies g=53093 c=53092 q=1018) > NMI backtrace for cpu 1 > CPU: 1 PID: 16 Comm: ksoftirqd/1 Not tainted 4.15.0-rc5+ #177 > 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+0x194/0x257 lib/dump_stack.c:53 > nmi_cpu_backtrace+0x1d2/0x210 lib/nmi_backtrace.c:103 > nmi_trigger_cpumask_backtrace+0x122/0x180 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+0x186/0x1d9 kernel/rcu/tree.c:1459 > print_cpu_stall kernel/rcu/tree.c:1608 [inline] > check_cpu_stall.isra.61+0xbb8/0x15b0 kernel/rcu/tree.c:1676 > __rcu_pending kernel/rcu/tree.c:3440 [inline] > rcu_pending kernel/rcu/tree.c:3502 [inline] > rcu_check_callbacks+0x256/0xd00 kernel/rcu/tree.c:2842 > update_process_times+0x30/0x60 kernel/time/timer.c:1630 > tick_sched_handle+0x85/0x160 kernel/time/tick-sched.c:162 > tick_sched_timer+0x42/0x120 kernel/time/tick-sched.c:1166 > __run_hrtimer kernel/time/hrtimer.c:1211 [inline] > __hrtimer_run_queues+0x358/0xe20 kernel/time/hrtimer.c:1275 > hrtimer_interrupt+0x1c2/0x5e0 kernel/time/hrtimer.c:1309 > local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1025 [inline] > smp_apic_timer_interrupt+0x14a/0x700 arch/x86/kernel/apic/apic.c:1050 > apic_timer_interrupt+0xa9/0xb0 arch/x86/entry/entry_64.S:904 > </IRQ> > RIP: 0010:__sanitizer_cov_trace_pc+0x1e/0x50 kernel/kcov.c:97 > RSP: 0018:ffff8801d9fae2f8 EFLAGS: 00000206 ORIG_RAX: ffffffffffffff11 > RAX: ffff8801d9f9e440 RBX: ffff8801c3591340 RCX: ffffffff84c2553b > RDX: 0000000000000100 RSI: ffff8801b06a0640 RDI: 0000000000000000 > RBP: ffff8801d9fae2f8 R08: ffffed00360d6059 R09: ffffed00360d6059 > R10: 000000000000000b R11: ffffed00360d6058 R12: ffff8801b06a0658 > R13: ffff8801d9fae498 R14: 00000000000025c0 R15: dffffc0000000000 > _decode_session6+0x9eb/0x1380 net/ipv6/xfrm6_policy.c:160 > __xfrm_decode_session+0x68/0x110 net/xfrm/xfrm_policy.c:2358 > xfrm_decode_session_reverse include/net/xfrm.h:1213 [inline] > icmpv6_route_lookup+0x356/0x660 net/ipv6/icmp.c:372 > icmp6_send+0x17cd/0x28c0 net/ipv6/icmp.c:551 > icmpv6_param_prob+0x2c/0x40 net/ipv6/icmp.c:598 > ipv6_frag_rcv+0x342b/0x5320 net/ipv6/reassembly.c:583 > ip6_input_finish+0x37e/0x17a0 net/ipv6/ip6_input.c:284 > NF_HOOK include/linux/netfilter.h:250 [inline] > ip6_input+0xe9/0x560 net/ipv6/ip6_input.c:327 > dst_input include/net/dst.h:449 [inline] > ip6_rcv_finish+0x1a9/0x7a0 net/ipv6/ip6_input.c:71 > NF_HOOK include/linux/netfilter.h:250 [inline] > ipv6_rcv+0xf37/0x1fa0 net/ipv6/ip6_input.c:208 > __netif_receive_skb_core+0x1a41/0x3460 net/core/dev.c:4499 > __netif_receive_skb+0x2c/0x1b0 net/core/dev.c:4564 > process_backlog+0x203/0x740 net/core/dev.c:5244 > napi_poll net/core/dev.c:5642 [inline] > net_rx_action+0x792/0x1910 net/core/dev.c:5708 > __do_softirq+0x2d7/0xb85 kernel/softirq.c:285 > run_ksoftirqd+0x50/0x100 kernel/softirq.c:666 > smpboot_thread_fn+0x450/0x7c0 kernel/smpboot.c:164 > kthread+0x33c/0x400 kernel/kthread.c:238 > ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:515 > > > --- > This bug is generated by a dumb bot. It may contain errors. > See https://goo.gl/tpsmEJ for details. > Direct all questions to syzkaller@googlegroups.com. > > syzbot will keep track of this bug report. > If you forgot to add the Reported-by tag, once the fix for this bug is > merged > into any tree, please reply to this email with: > #syz fix: exact-commit-title > To mark this as a duplicate of another syzbot report, please reply with: > #syz dup: exact-subject-of-another-report > If it's a one-off invalid bug report, please reply with: > #syz invalid > Note: if the crash happens again, it will cause creation of a new bug > report. > Note: all commands must start from beginning of the line in the email body. > > -- > You received this message because you are subscribed to the Google Groups > "syzkaller-bugs" group. > To unsubscribe from this group and stop receiving emails from it, send an > email to syzkaller-bugs+unsubscribe@googlegroups.com. > To view this discussion on the web visit > https://groups.google.com/d/msgid/syzkaller-bugs/001a1143d40c20464f056505745b%40google.com. > For more options, visit https://groups.google.com/d/optout.
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