INFO: rcu detected stall in ipv6_list_rcv

Status: auto-obsoleted due to no activity on 2025/06/16 07:00
Reported-by: syzbot+3b868f0154d050949f3e@syzkaller.appspotmail.com
First crash: 533d, last: 529d
▶ ▼ Similar bugs (5)
Kernel Title Rank 🛈 Repro Cause bisect Fix bisect Count Last Reported Patched Status
linux-6.1 INFO: rcu detected stall in ipv6_list_rcv (2) 1 1 136d 136d 0/3 auto-obsoleted due to no activity on 2026/07/14 06:20
upstream INFO: rcu detected stall in ipv6_list_rcv (3) net 1 6 607d 812d 0/29 auto-obsoleted due to no activity on 2025/03/20 19:56
linux-6.6 INFO: rcu detected stall in ipv6_list_rcv 1 1 76d 76d 0/2 upstream: reported on 2026/06/04 21:34
upstream INFO: rcu detected stall in ipv6_list_rcv (2) net 1 1 1778d 1778d 0/29 auto-closed as invalid on 2021/12/05 01:49
upstream INFO: rcu detected stall in ipv6_list_rcv trace 1 2 2079d 2080d 0/29 auto-closed as invalid on 2021/03/09 05:51

Sample crash report:
rcu: INFO: rcu_preempt detected expedited stalls on CPUs/tasks: { P4568 0-.... } 2737 jiffies s: 2521 root: 0x1/T
rcu: blocking rcu_node structures (internal RCU debug):
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 PID: 4568 Comm: syz.4.71 Not tainted 6.1.130-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2025
RIP: 0010:perf_prepare_sample+0x93/0x1fb0 kernel/events/core.c:7499
Code: f1 f1 f1 f1 00 f3 f3 f3 48 89 4c 24 58 4a 89 04 31 e8 f1 bd da ff 49 8d 9c 24 f0 00 00 00 48 89 d8 48 c1 e8 03 42 80 3c 30 00 <74> 08 48 89 df e8 63 20 32 00 48 8b 03 48 89 44 24 18 4c 89 f8 48
RSP: 0018:ffffc90000006740 EFLAGS: 00000046
RAX: 1ffff1100aa38f1e RBX: ffff8880551c78f0 RCX: ffff888019700000
RDX: 0000000000010100 RSI: ffffc90000006a40 RDI: ffffc900000068e0
RBP: ffffc90000006830 R08: ffffffff81b0013a R09: fffffbfff225724d
R10: 0000000000000000 R11: dffffc0000000001 R12: ffff8880551c7800
R13: ffffc900000068e0 R14: dffffc0000000000 R15: ffffc900000068e0
FS:  00007f6a3fc246c0(0000) GS:ffff8880b8e00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000001b2da17ff8 CR3: 0000000020334000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000600
Call Trace:
 <NMI>
 </NMI>
 <IRQ>
 __perf_event_output kernel/events/core.c:7707 [inline]
 perf_event_output_forward+0x1b7/0x330 kernel/events/core.c:7727
 __perf_event_overflow+0x45e/0x640 kernel/events/core.c:9473
 perf_swevent_hrtimer+0x38e/0x4f0 kernel/events/core.c:10881
 __run_hrtimer kernel/time/hrtimer.c:1689 [inline]
 __hrtimer_run_queues+0x5a7/0xe50 kernel/time/hrtimer.c:1753
 hrtimer_interrupt+0x392/0x980 kernel/time/hrtimer.c:1815
 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1107 [inline]
 __sysvec_apic_timer_interrupt+0x158/0x5b0 arch/x86/kernel/apic/apic.c:1124
 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1118 [inline]
 sysvec_apic_timer_interrupt+0x4d/0xc0 arch/x86/kernel/apic/apic.c:1118
 asm_sysvec_apic_timer_interrupt+0x16/0x20 arch/x86/include/asm/idtentry.h:691
RIP: 0010:unwind_next_frame+0x767/0x2220
Code: 84 c0 0f 84 45 04 00 00 89 d9 80 e1 07 38 c1 0f 8c 38 04 00 00 be 02 00 00 00 49 89 fe 48 89 df e8 1e 20 a5 00 e9 63 19 00 00 <48> 8b 44 24 60 80 3c 38 00 4c 8b 24 24 48 8b 5c 24 68 74 0e 49 89
RSP: 0018:ffffc90000006f60 EFLAGS: 00000297
RAX: 0000000000000003 RBX: 0000000000000005 RCX: ffffffff8efe8da8
RDX: ffffffff8f929cc2 RSI: ffffffff889be826 RDI: dffffc0000000000
RBP: ffffffff8f929cc2 R08: 000000000000000f R09: ffffc90000007130
R10: 0000000000000000 R11: dffffc0000000001 R12: 0000000000000000
R13: ffffffff8f929cc6 R14: ffffffff8efe8da4 R15: 1ffffffff1f25398
 arch_stack_walk+0x10d/0x140 arch/x86/kernel/stacktrace.c:25
 stack_trace_save+0x113/0x1c0 kernel/stacktrace.c:122
 kasan_save_stack mm/kasan/common.c:45 [inline]
 kasan_set_track+0x4b/0x70 mm/kasan/common.c:52
 kasan_save_free_info+0x27/0x40 mm/kasan/generic.c:516
 ____kasan_slab_free+0xd6/0x120 mm/kasan/common.c:236
 kasan_slab_free include/linux/kasan.h:177 [inline]
 slab_free_hook mm/slub.c:1724 [inline]
 slab_free_freelist_hook mm/slub.c:1750 [inline]
 slab_free mm/slub.c:3661 [inline]
 __kmem_cache_free+0x25c/0x3c0 mm/slub.c:3674
 skb_free_head net/core/skbuff.c:762 [inline]
 skb_release_data+0x5de/0x7a0 net/core/skbuff.c:791
 skb_release_all net/core/skbuff.c:856 [inline]
 __kfree_skb net/core/skbuff.c:870 [inline]
 kfree_skb_reason+0x16f/0x390 net/core/skbuff.c:893
 kfree_skb include/linux/skbuff.h:1220 [inline]
 ip6_mc_input+0xa13/0xc10 net/ipv6/ip6_input.c:589
 dst_input include/net/dst.h:463 [inline]
 ip6_sublist_rcv_finish net/ipv6/ip6_input.c:88 [inline]
 ip6_list_rcv_finish net/ipv6/ip6_input.c:146 [inline]
 ip6_sublist_rcv+0xfc5/0x1340 net/ipv6/ip6_input.c:320
 ipv6_list_rcv+0x429/0x470 net/ipv6/ip6_input.c:355
 __netif_receive_skb_list_ptype net/core/dev.c:5612 [inline]
 __netif_receive_skb_list_core+0x6b1/0x890 net/core/dev.c:5660
 __netif_receive_skb_list net/core/dev.c:5712 [inline]
 netif_receive_skb_list_internal+0xa0d/0xe20 net/core/dev.c:5803
 netif_receive_skb_list+0x54/0x560 net/core/dev.c:5855
 ieee80211_rx_napi+0x35e/0x3b0 net/mac80211/rx.c:5313
 ieee80211_rx include/net/mac80211.h:4831 [inline]
 ieee80211_handle_queued_frames+0x103/0x1b0 net/mac80211/main.c:317
 tasklet_action_common+0x3cb/0x4a0
 handle_softirqs+0x2ee/0xa40 kernel/softirq.c:578
 __do_softirq kernel/softirq.c:612 [inline]
 invoke_softirq kernel/softirq.c:452 [inline]
 __irq_exit_rcu+0x157/0x240 kernel/softirq.c:661
 irq_exit_rcu+0x5/0x20 kernel/softirq.c:673
 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1118 [inline]
 sysvec_apic_timer_interrupt+0xa0/0xc0 arch/x86/kernel/apic/apic.c:1118
 </IRQ>
 <TASK>
 asm_sysvec_apic_timer_interrupt+0x16/0x20 arch/x86/include/asm/idtentry.h:691
RIP: 0010:preempt_schedule_irq+0xf2/0x1c0 kernel/sched/core.c:6872
Code: 89 f5 49 c1 ed 03 eb 0d 48 f7 03 08 00 00 00 0f 84 97 00 00 00 bf 01 00 00 00 e8 f9 75 a4 f6 e8 a4 48 d7 f6 fb bf 01 00 00 00 <e8> 79 b4 ff ff 43 80 7c 3d 00 00 74 08 4c 89 f7 e8 c9 ea 27 f7 48
RSP: 0018:ffffc9000c43f8a0 EFLAGS: 00000286
RAX: a42076745e43b600 RBX: 1ffff92001887f1c RCX: ffffffff973c0103
RDX: dffffc0000000000 RSI: ffffffff8b0c1d40 RDI: 0000000000000001
RBP: ffffc9000c43f960 R08: ffffffff901ce000 R09: ffffffff901ce008
R10: ffffffff901ce018 R11: ffffffff901ce010 R12: 1ffff92001887f14
R13: 1ffff92001887f18 R14: ffffc9000c43f8c0 R15: dffffc0000000000
 irqentry_exit+0x53/0x80 kernel/entry/common.c:439
 asm_sysvec_apic_timer_interrupt+0x16/0x20 arch/x86/include/asm/idtentry.h:691
RIP: 0010:get_page_owner mm/page_owner.c:106 [inline]
RIP: 0010:__reset_page_owner+0xc4/0x1a0 mm/page_owner.c:151
Code: 9f 00 00 00 e8 dd 7c 9f ff 41 83 ee 01 0f 82 b5 00 00 00 e8 ce 7c 9f ff 48 89 df be 08 00 00 00 e8 f1 e0 f6 ff 48 0f ba 33 01 <48> 8b 05 f5 7d 58 0b 48 8d 2c 03 48 8d 7c 03 0c 48 89 f8 48 c1 e8
RSP: 0018:ffffc9000c43fa28 EFLAGS: 00000257
RAX: ffffffff81eb1c01 RBX: ffff88801c9ab608 RCX: ffffffff81eb1cbf
RDX: 0000000000000001 RSI: 0000000000000008 RDI: ffff88801c9ab608
RBP: ffff88801c9ab5e0 R08: dffffc0000000000 R09: ffffed10039356c2
R10: 0000000000000000 R11: dffffc0000000001 R12: dffffc0000000000
R13: 0000000000000003 R14: 0000000000000006 R15: 1ffffffff1a87c78
 reset_page_owner include/linux/page_owner.h:24 [inline]
 free_pages_prepare mm/page_alloc.c:1459 [inline]
 free_pcp_prepare mm/page_alloc.c:1509 [inline]
 free_unref_page_prepare+0x12a6/0x15b0 mm/page_alloc.c:3384
 free_unref_page+0x33/0x3e0 mm/page_alloc.c:3479
 free_slab mm/slub.c:2031 [inline]
 discard_slab mm/slub.c:2037 [inline]
 __unfreeze_partials+0x1b7/0x210 mm/slub.c:2586
 put_cpu_partial+0x17b/0x250 mm/slub.c:2662
 qlink_free mm/kasan/quarantine.c:168 [inline]
 qlist_free_all+0x76/0xe0 mm/kasan/quarantine.c:187
 kasan_quarantine_reduce+0x156/0x170 mm/kasan/quarantine.c:294
 __kasan_slab_alloc+0x1f/0x70 mm/kasan/common.c:305
 kasan_slab_alloc include/linux/kasan.h:201 [inline]
 slab_post_alloc_hook+0x52/0x3a0 mm/slab.h:737
 slab_alloc_node mm/slub.c:3398 [inline]
 slab_alloc mm/slub.c:3406 [inline]
 __kmem_cache_alloc_lru mm/slub.c:3413 [inline]
 kmem_cache_alloc_lru+0x10c/0x2d0 mm/slub.c:3429
 alloc_inode_sb include/linux/fs.h:3245 [inline]
 sock_alloc_inode+0x24/0xc0 net/socket.c:306
 alloc_inode fs/inode.c:261 [inline]
 new_inode_pseudo+0x61/0x1d0 fs/inode.c:1063
 sock_alloc net/socket.c:631 [inline]
 __sock_create+0x11f/0x930 net/socket.c:1514
 sock_create net/socket.c:1606 [inline]
 __sys_socket_create net/socket.c:1643 [inline]
 __sys_socket+0x136/0x3a0 net/socket.c:1671
 __do_sys_socket net/socket.c:1684 [inline]
 __se_sys_socket net/socket.c:1682 [inline]
 __x64_sys_socket+0x76/0x80 net/socket.c:1682
 do_syscall_x64 arch/x86/entry/common.c:51 [inline]
 do_syscall_64+0x3b/0xb0 arch/x86/entry/common.c:81
 entry_SYSCALL_64_after_hwframe+0x68/0xd2
RIP: 0033:0x7f6a3ed8d169
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 a8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f6a3fc24038 EFLAGS: 00000246 ORIG_RAX: 0000000000000029
RAX: ffffffffffffffda RBX: 00007f6a3efa5fa0 RCX: 00007f6a3ed8d169
RDX: 0000000000000002 RSI: 0000000000000003 RDI: 000000000000000f
RBP: 00007f6a3ee0e2a0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 00007f6a3efa5fa0 R15: 00007ffc7258f208
 </TASK>

Crashes (2):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2025/03/08 06:59 linux-6.1.y 6ae7ac5c4251 7e3bd60d .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-perf INFO: rcu detected stall in ipv6_list_rcv
2025/03/05 00:52 linux-6.1.y 3a8358583626 c3901742 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-perf INFO: rcu detected stall in ipv6_list_rcv
* Struck through repros no longer work on HEAD.