BUG: soft lockup in ipv6_rcv

Status: auto-closed as invalid on 2019/10/25 14:11
Subsystems: net
[Documentation on labels]
Reported-by: syzbot+8963398ab778549744e2@syzkaller.appspotmail.com
First crash: 2569d, last: 2559d
▶ ▼ Discussions (1)
Title Replies (including bot) Last reply
BUG: soft lockup in ipv6_rcv 0 (1) 2019/07/31 08:30
▶ ▼ Similar bugs (9)
Kernel Title Rank 🛈 Repro Cause bisect Fix bisect Count Last Reported Patched Status
upstream INFO: rcu detected stall in ipv6_rcv (4) net 1 syz, C done done 12 446d 947d 0/29 auto-obsoleted due to no activity on 2025/08/26 02:53
android-5-10 BUG: soft lockup in ipv6_rcv (2) 1 1 120d 120d 0/2 auto-obsoleted due to no activity on 2026/07/08 15:39
upstream BUG: soft lockup in ipv6_rcv (2) net 1 1 1045d 1045d 0/29 closed as invalid on 2023/10/27 13:35
upstream BUG: soft lockup in ipv6_rcv (3) net 1 1 303d 303d 0/29 closed as invalid on 2025/11/14 06:50
android-5-15 BUG: soft lockup in ipv6_rcv origin:lts 1 syz, C done 19 620d 840d 0/2 auto-obsoleted due to no activity on 2025/03/05 18:06
android-5-10 BUG: soft lockup in ipv6_rcv 1 3 736d 753d 0/2 auto-obsoleted due to no activity on 2024/10/30 14:49
linux-4.19 BUG: soft lockup in ipv6_rcv 1 syz, C error 25 1469d 1947d 0/1 upstream: reported C repro on 2021/04/08 17:19
upstream BUG: soft lockup in ipv6_rcv (4) net 1 1 244d 244d 0/29 closed as invalid on 2026/01/13 16:48
android-54 BUG: soft lockup in ipv6_rcv 1 1 816d 816d 0/2 auto-obsoleted due to no activity on 2024/08/11 06:11

Sample crash report:
watchdog: BUG: soft lockup - CPU#0 stuck for 123s! [syz-executor.4:4723]
Modules linked in:
irq event stamp: 0
hardirqs last  enabled at (0): [<0000000000000000>] 0x0
hardirqs last disabled at (0): [<ffffffff8142b8a5>] copy_process+0x1815/0x6b00 kernel/fork.c:1968
softirqs last  enabled at (0): [<ffffffff8142b94c>] copy_process+0x18bc/0x6b00 kernel/fork.c:1971
softirqs last disabled at (0): [<0000000000000000>] 0x0
CPU: 0 PID: 4723 Comm: syz-executor.4 Not tainted 5.3.0-rc2-next-20190805 #59
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
RIP: 0010:kasan_mem_to_shadow include/linux/kasan.h:29 [inline]
RIP: 0010:memory_is_poisoned_n mm/kasan/generic.c:135 [inline]
RIP: 0010:memory_is_poisoned mm/kasan/generic.c:166 [inline]
RIP: 0010:check_memory_region_inline mm/kasan/generic.c:182 [inline]
RIP: 0010:check_memory_region+0x4c/0x1a0 mm/kasan/generic.c:192
Code: 0f 86 07 01 00 00 4c 8d 5c 37 ff 49 89 f8 48 b8 00 00 00 00 00 fc ff df 4d 89 da 49 c1 e8 03 4d 8d 24 00 49 c1 ea 03 49 01 c2 <4c> 89 e0 49 8d 5a 01 49 89 d9 4d 29 e1 49 83 f9 10 0f 8e ad 00 00
RSP: 0018:ffff8880ae8091d8 EFLAGS: 00000282 ORIG_RAX: ffffffffffffff13
RAX: dffffc0000000000 RBX: ffff88805895d188 RCX: ffffffff8158f457
RDX: 0000000000000000 RSI: 0000000000000004 RDI: ffff88805895d188
RBP: ffff8880ae8091f0 R08: 1ffff1100b12ba31 R09: ffffed100b12ba32
R10: ffffed100b12ba31 R11: ffff88805895d18b R12: ffffed100b12ba31
R13: 0000000000000003 R14: ffffed100b12ba31 R15: 0000000000000001
FS:  0000555557438940(0000) GS:ffff8880ae800000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000001b2cc3b000 CR3: 00000000917fd000 CR4: 00000000001406f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <IRQ>
 __kasan_check_read+0x11/0x20 mm/kasan/common.c:92
 atomic_read include/asm-generic/atomic-instrumented.h:26 [inline]
 virt_spin_lock arch/x86/include/asm/qspinlock.h:83 [inline]
 native_queued_spin_lock_slowpath+0xb7/0x9f0 kernel/locking/qspinlock.c:325
 pv_queued_spin_lock_slowpath arch/x86/include/asm/paravirt.h:642 [inline]
 queued_spin_lock_slowpath arch/x86/include/asm/qspinlock.h:50 [inline]
 queued_spin_lock include/asm-generic/qspinlock.h:81 [inline]
 do_raw_spin_lock+0x20e/0x2e0 kernel/locking/spinlock_debug.c:113
 __raw_spin_lock_bh include/linux/spinlock_api_smp.h:136 [inline]
 _raw_spin_lock_bh+0x3b/0x50 kernel/locking/spinlock.c:175
 spin_lock_bh include/linux/spinlock.h:343 [inline]
 release_sock+0x20/0x1c0 net/core/sock.c:2932
 wait_on_pending_writer+0x20f/0x420 net/tls/tls_main.c:91
 tls_sk_proto_cleanup+0x2c5/0x3e0 net/tls/tls_main.c:295
 tls_sk_proto_unhash+0x90/0x3f0 net/tls/tls_main.c:330
 tcp_set_state+0x5b9/0x7d0 net/ipv4/tcp.c:2235
 tcp_done+0xe2/0x320 net/ipv4/tcp.c:3824
 tcp_reset+0x132/0x500 net/ipv4/tcp_input.c:4123
 tcp_validate_incoming+0xa2d/0x1660 net/ipv4/tcp_input.c:5483
 tcp_rcv_established+0x6b5/0x1e70 net/ipv4/tcp_input.c:5691
 tcp_v6_do_rcv+0x41e/0x12c0 net/ipv6/tcp_ipv6.c:1371
 tcp_v6_rcv+0x31f1/0x3500 net/ipv6/tcp_ipv6.c:1603
 ip6_protocol_deliver_rcu+0x2fe/0x1660 net/ipv6/ip6_input.c:397
 ip6_input_finish+0x84/0x170 net/ipv6/ip6_input.c:438
 NF_HOOK include/linux/netfilter.h:305 [inline]
 NF_HOOK include/linux/netfilter.h:299 [inline]
 ip6_input+0xe4/0x3f0 net/ipv6/ip6_input.c:447
 dst_input include/net/dst.h:442 [inline]
 ip6_rcv_finish+0x1de/0x2f0 net/ipv6/ip6_input.c:76
 NF_HOOK include/linux/netfilter.h:305 [inline]
 NF_HOOK include/linux/netfilter.h:299 [inline]
 ipv6_rcv+0x10e/0x420 net/ipv6/ip6_input.c:272
 __netif_receive_skb_one_core+0x113/0x1a0 net/core/dev.c:4999
 __netif_receive_skb+0x2c/0x1d0 net/core/dev.c:5113
 process_backlog+0x206/0x750 net/core/dev.c:5924
 napi_poll net/core/dev.c:6347 [inline]
 net_rx_action+0x508/0x10c0 net/core/dev.c:6413
 __do_softirq+0x262/0x98c kernel/softirq.c:292
 do_softirq_own_stack+0x2a/0x40 arch/x86/entry/entry_64.S:1080
 </IRQ>
 do_softirq.part.0+0x11a/0x170 kernel/softirq.c:337
 do_softirq kernel/softirq.c:329 [inline]
 __local_bh_enable_ip+0x211/0x270 kernel/softirq.c:189
 local_bh_enable include/linux/bottom_half.h:32 [inline]
 inet_csk_listen_stop+0x1e0/0x850 net/ipv4/inet_connection_sock.c:993
 tcp_close+0xd5b/0x10e0 net/ipv4/tcp.c:2338
 inet_release+0xed/0x200 net/ipv4/af_inet.c:427
 inet6_release+0x53/0x80 net/ipv6/af_inet6.c:470
 __sock_release+0xce/0x280 net/socket.c:590
 sock_close+0x1e/0x30 net/socket.c:1268
 __fput+0x2ff/0x890 fs/file_table.c:280
 ____fput+0x16/0x20 fs/file_table.c:313
 task_work_run+0x145/0x1c0 kernel/task_work.c:113
 tracehook_notify_resume include/linux/tracehook.h:188 [inline]
 exit_to_usermode_loop+0x316/0x380 arch/x86/entry/common.c:163
 prepare_exit_to_usermode arch/x86/entry/common.c:194 [inline]
 syscall_return_slowpath arch/x86/entry/common.c:274 [inline]
 do_syscall_64+0x65f/0x760 arch/x86/entry/common.c:300
 entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x413511
Code: 75 14 b8 03 00 00 00 0f 05 48 3d 01 f0 ff ff 0f 83 04 1b 00 00 c3 48 83 ec 08 e8 0a fc ff ff 48 89 04 24 b8 03 00 00 00 0f 05 <48> 8b 3c 24 48 89 c2 e8 53 fc ff ff 48 89 d0 48 83 c4 08 48 3d 01
RSP: 002b:00007ffc4806c600 EFLAGS: 00000293 ORIG_RAX: 0000000000000003
RAX: 0000000000000000 RBX: 0000000000000009 RCX: 0000000000413511
RDX: 0000000000000000 RSI: ffffffff873d7270 RDI: 0000000000000008
RBP: 0000000000000001 R08: ffffffff8128fdec R09: 0000000043c4c19e
R10: 00007ffc4806c6e0 R11: 0000000000000293 R12: 000000000075c9a0
R13: 000000000075c9a0 R14: 0000000000761768 R15: ffffffffffffffff
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 PID: 0 Comm: swapper/1 Not tainted 5.3.0-rc2-next-20190805 #59
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
RIP: 0010:cpu_relax arch/x86/include/asm/processor.h:656 [inline]
RIP: 0010:virt_spin_lock arch/x86/include/asm/qspinlock.h:84 [inline]
RIP: 0010:native_queued_spin_lock_slowpath+0x132/0x9f0 kernel/locking/qspinlock.c:325
Code: 00 00 00 48 8b 45 d0 65 48 33 04 25 28 00 00 00 0f 85 37 07 00 00 48 81 c4 98 00 00 00 5b 41 5c 41 5d 41 5e 41 5f 5d c3 f3 90 <e9> 73 ff ff ff 8b 45 98 4c 8d 65 d8 3d 00 01 00 00 0f 84 e5 00 00
RSP: 0018:ffff8880ae909b48 EFLAGS: 00000202
RAX: 0000000000000000 RBX: ffff88805895d188 RCX: ffffffff8158f457
RDX: 0000000000000000 RSI: 0000000000000004 RDI: ffff88805895d188
RBP: ffff8880ae909c08 R08: 1ffff1100b12ba31 R09: ffffed100b12ba32
R10: ffffed100b12ba31 R11: ffff88805895d18b R12: 0000000000000001
R13: 0000000000000003 R14: ffffed100b12ba31 R15: 0000000000000001
FS:  0000000000000000(0000) GS:ffff8880ae900000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000001b2cc39000 CR3: 00000000687ee000 CR4: 00000000001406e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <IRQ>
 pv_queued_spin_lock_slowpath arch/x86/include/asm/paravirt.h:642 [inline]
 queued_spin_lock_slowpath arch/x86/include/asm/qspinlock.h:50 [inline]
 queued_spin_lock include/asm-generic/qspinlock.h:81 [inline]
 do_raw_spin_lock+0x20e/0x2e0 kernel/locking/spinlock_debug.c:113
 __raw_spin_lock include/linux/spinlock_api_smp.h:143 [inline]
 _raw_spin_lock+0x37/0x40 kernel/locking/spinlock.c:151
 spin_lock include/linux/spinlock.h:338 [inline]
 tcp_delack_timer+0x2b/0x2a0 net/ipv4/tcp_timer.c:318
 call_timer_fn+0x1ac/0x780 kernel/time/timer.c:1404
 expire_timers kernel/time/timer.c:1449 [inline]
 __run_timers kernel/time/timer.c:1771 [inline]
 __run_timers kernel/time/timer.c:1738 [inline]
 run_timer_softirq+0x6c0/0x17f0 kernel/time/timer.c:1784
 __do_softirq+0x262/0x98c kernel/softirq.c:292
 invoke_softirq kernel/softirq.c:373 [inline]
 irq_exit+0x19b/0x1e0 kernel/softirq.c:413
 exiting_irq arch/x86/include/asm/apic.h:536 [inline]
 smp_apic_timer_interrupt+0x1a3/0x610 arch/x86/kernel/apic/apic.c:1095
 apic_timer_interrupt+0xf/0x20 arch/x86/entry/entry_64.S:828
 </IRQ>
RIP: 0010:native_safe_halt+0xe/0x10 arch/x86/include/asm/irqflags.h:61
Code: 08 4a 6d fa eb 8a 90 90 90 90 90 90 e9 07 00 00 00 0f 00 2d e4 66 48 00 f4 c3 66 90 e9 07 00 00 00 0f 00 2d d4 66 48 00 fb f4 <c3> 90 55 48 89 e5 41 57 41 56 41 55 41 54 53 e8 2e 0d 20 fa e8 09
RSP: 0018:ffff8880a98dfcd0 EFLAGS: 00000282 ORIG_RAX: ffffffffffffff13
RAX: 1ffffffff11a5ed7 RBX: 0000000000000000 RCX: 1ffffffff134c93e
RDX: dffffc0000000000 RSI: ffffffff8177a69e RDI: ffffffff873fc5ec
RBP: ffff8880a98dfd00 R08: ffff8880a98cc340 R09: ffffed1015319869
R10: ffffed1015319868 R11: ffff8880a98cc347 R12: 0000000000000001
R13: ffffffff8960c720 R14: 0000000000000000 R15: 0000000000000001
 default_enter_idle+0x71/0xf0 drivers/cpuidle/cpuidle-haltpoll.c:27
 cpuidle_enter_state+0xee/0xf70 drivers/cpuidle/cpuidle.c:229
 cpuidle_enter+0x4f/0xa0 drivers/cpuidle/cpuidle.c:344
 call_cpuidle kernel/sched/idle.c:117 [inline]
 cpuidle_idle_call kernel/sched/idle.c:201 [inline]
 do_idle+0x4bb/0x770 kernel/sched/idle.c:263
 cpu_startup_entry+0x1b/0x20 kernel/sched/idle.c:354
 start_secondary+0x2f4/0x410 arch/x86/kernel/smpboot.c:264
 secondary_startup_64+0xa4/0xb0 arch/x86/kernel/head_64.S:241

Crashes (24):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2019/08/05 13:49 linux-next b1645c0cbd48 6affd8e8 .config console log report ci-upstream-linux-next-kasan-gce-root
2019/08/05 10:47 linux-next b1645c0cbd48 6affd8e8 .config console log report ci-upstream-linux-next-kasan-gce-root
2019/08/04 08:26 linux-next 7b4980e0bcf4 6affd8e8 .config console log report ci-upstream-linux-next-kasan-gce-root
2019/08/01 22:55 linux-next 882e8691130b 835dffe7 .config console log report ci-upstream-linux-next-kasan-gce-root
2019/08/01 18:25 linux-next 882e8691130b 835dffe7 .config console log report ci-upstream-linux-next-kasan-gce-root
2019/07/31 11:18 linux-next ce96e791d6a7 7c7ded69 .config console log report ci-upstream-linux-next-kasan-gce-root
2019/07/31 03:16 linux-next 70f4b4ac1655 7c7ded69 .config console log report ci-upstream-linux-next-kasan-gce-root
2019/07/30 12:08 linux-next 70f4b4ac1655 f28bf2a5 .config console log report ci-upstream-linux-next-kasan-gce-root
2019/07/30 11:40 linux-next 70f4b4ac1655 f28bf2a5 .config console log report ci-upstream-linux-next-kasan-gce-root
2019/07/30 03:35 linux-next 0d8b3265d9a6 f67095ee .config console log report ci-upstream-linux-next-kasan-gce-root
2019/07/29 19:03 linux-next 0d8b3265d9a6 f67095ee .config console log report ci-upstream-linux-next-kasan-gce-root
2019/07/29 18:47 linux-next 0d8b3265d9a6 f67095ee .config console log report ci-upstream-linux-next-kasan-gce-root
2019/07/28 23:49 linux-next fde50b96be82 c85e1c5b .config console log report ci-upstream-linux-next-kasan-gce-root
2019/07/28 23:40 linux-next fde50b96be82 c85e1c5b .config console log report ci-upstream-linux-next-kasan-gce-root
2019/07/28 16:15 linux-next fde50b96be82 c85e1c5b .config console log report ci-upstream-linux-next-kasan-gce-root
2019/07/28 07:44 linux-next fde50b96be82 c85e1c5b .config console log report ci-upstream-linux-next-kasan-gce-root
2019/07/28 06:43 linux-next fde50b96be82 c85e1c5b .config console log report ci-upstream-linux-next-kasan-gce-root
2019/07/28 06:07 linux-next fde50b96be82 c85e1c5b .config console log report ci-upstream-linux-next-kasan-gce-root
2019/07/28 03:17 linux-next fde50b96be82 c85e1c5b .config console log report ci-upstream-linux-next-kasan-gce-root
2019/07/27 18:47 linux-next fde50b96be82 c85e1c5b .config console log report ci-upstream-linux-next-kasan-gce-root
2019/07/27 08:13 linux-next fde50b96be82 c85e1c5b .config console log report ci-upstream-linux-next-kasan-gce-root
2019/07/27 07:48 linux-next fde50b96be82 c85e1c5b .config console log report ci-upstream-linux-next-kasan-gce-root
2019/07/26 23:32 linux-next fde50b96be82 3e5d1beb .config console log report ci-upstream-linux-next-kasan-gce-root
2019/07/26 22:56 linux-next fde50b96be82 3e5d1beb .config console log report ci-upstream-linux-next-kasan-gce-root
* Struck through repros no longer work on HEAD.