BUG: soft lockup in sys_clone

Status: auto-obsoleted due to no activity on 2024/12/19 12:14
Bug presence: origin:upstream
[Documentation on labels]
Reported-by: syzbot+ed8a52605340709080c9@syzkaller.appspotmail.com
First crash: 863d, last: 707d
Fix bisection: failed (error log, bisect log)
  
▶ ▼ Bug presence (3)
Date Name Commit Repro Result
2024/10/09 lts (merge base) 14e468424d3e C Didn't crash
2024/10/09 upstream (ToT) 75b607fab38d C [report] lost connection to test machine
2024/11/23 upstream (ToT) 619d996c8642 C Didn't crash
▶ ▼ Similar bugs (16)
Kernel Title Rank 🛈 Repro Cause bisect Fix bisect Count Last Reported Patched Status
android-5-10 BUG: soft lockup in sys_clone 1 1 771d 771d 0/2 auto-obsoleted due to no activity on 2024/10/06 12:58
upstream BUG: soft lockup in sys_clone kernel 1 3 2335d 2339d 0/29 closed as invalid on 2020/05/29 21:04
android-5-10 BUG: soft lockup in sys_clone (2) 1 1 345d 345d 0/2 auto-obsoleted due to no activity on 2025/12/06 02:03
android-5-10 BUG: soft lockup in sys_clone (4) 1 1 72d 72d 0/2 premoderation: reported on 2026/06/07 05:26
android-5-10 BUG: soft lockup in sys_clone (3) 1 1 198d 198d 0/2 auto-obsoleted due to no activity on 2026/05/02 19:39
upstream INFO: rcu detected stall in sys_clone (8) mm 1 syz, C error 487 1d23h 872d 0/29 upstream: reported C repro on 2024/03/29 00:16
linux-5.15 INFO: rcu detected stall in sys_clone (2) missing-backport origin:upstream 1 syz, C done 178 2h20m 874d 0/3 upstream: reported C repro on 2024/03/27 00:16
linux-6.6 INFO: rcu detected stall in sys_clone 1 syz, C done 8 286d 371d 2/2 fixed on 2025/12/06 23:11
linux-5.15 INFO: rcu detected stall in sys_clone 1 1 986d 986d 0/3 auto-obsoleted due to no activity on 2024/03/15 18:08
linux-6.1 INFO: rcu detected stall in sys_clone 1 3 1133d 1205d 0/3 auto-obsoleted due to no activity on 2023/10/20 18:18
upstream INFO: rcu detected stall in sys_clone (4) kernel 1 1 1876d 1876d 0/29 auto-closed as invalid on 2021/09/27 17:49
upstream INFO: rcu detected stall in sys_clone (6) kasan mm 1 1 1546d 1546d 0/29 auto-closed as invalid on 2022/08/23 03:28
upstream INFO: rcu detected stall in sys_clone (5) kernfs 1 5 1680d 1780d 0/29 closed as invalid on 2022/02/08 10:00
upstream INFO: rcu detected stall in sys_clone (7) fs 1 1 1282d 1282d 0/29 auto-obsoleted due to no activity on 2023/05/14 17:18
linux-6.1 INFO: rcu detected stall in sys_clone (2) origin:upstream missing-backport 1 syz, C error 100 8d21h 881d 0/3 upstream: reported C repro on 2024/03/20 15:17
linux-6.6 INFO: rcu detected stall in sys_clone (2) 1 20 20d 252d 0/2 upstream: reported on 2025/12/09 09:13
▶ ▼ Last patch testing requests (6)
Created Duration User Patch Repo Result
2024/11/02 19:47 13m retest repro android13-5.15-lts no crash log
2024/11/02 19:47 59m retest repro android13-5.15-lts no crash log
2024/10/08 07:10 14m retest repro android13-5.15-lts no crash log
2024/10/02 22:23 21m retest repro android13-5.15-lts no crash log
2024/10/02 22:23 24m retest repro android13-5.15-lts no crash log
2024/10/02 22:23 1h44m retest repro android13-5.15-lts no crash log
▶ ▼ Fix bisection attempts (2)
Created Duration User Patch Repo Result
2024/10/15 02:02 0m bisect fix android13-5.15-lts error job log
2024/09/10 11:00 1h12m bisect fix android13-5.15-lts OK (0) job log log

Sample crash report:
watchdog: BUG: soft lockup - CPU#1 stuck for 225s! [syz.3.5:335]
Modules linked in:
CPU: 1 PID: 335 Comm: syz.3.5 Not tainted 5.15.152-syzkaller-00143-g70e1a731d986 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/27/2024
RIP: 0010:native_safe_halt arch/x86/include/asm/irqflags.h:51 [inline]
RIP: 0010:arch_safe_halt arch/x86/include/asm/irqflags.h:89 [inline]
RIP: 0010:kvm_wait+0x147/0x180 arch/x86/kernel/kvm.c:918
Code: 4c 89 e8 48 c1 e8 03 42 0f b6 04 20 84 c0 44 8b 74 24 1c 75 34 41 0f b6 45 00 44 38 f0 75 10 66 90 0f 00 2d 2b 02 13 04 fb f4 <e9> 24 ff ff ff fb e9 1e ff ff ff 44 89 e9 80 e1 07 38 c1 7c a3 4c
RSP: 0018:ffffc90000bc7220 EFLAGS: 00000246
RAX: 0000000000000001 RBX: 1ffff92000178e48 RCX: 1ffffffff0d5aa9c
RDX: 0000000000000001 RSI: 0000000000000001 RDI: ffff8881f7138ad4
RBP: ffffc90000bc72d0 R08: dffffc0000000000 R09: ffffed103ee2715b
R10: 0000000000000000 R11: dffffc0000000001 R12: dffffc0000000000
R13: ffff8881f7138ad4 R14: 0000000000000001 R15: 1ffff92000178e4c
FS:  00007f9f2b41d6c0(0000) GS:ffff8881f7100000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00000000200012c0 CR3: 000000010c508000 CR4: 00000000003506a0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <IRQ>
 </IRQ>
 <TASK>
 pv_wait arch/x86/include/asm/paravirt.h:597 [inline]
 pv_wait_node kernel/locking/qspinlock_paravirt.h:325 [inline]
 __pv_queued_spin_lock_slowpath+0x41b/0xc40 kernel/locking/qspinlock.c:473
 pv_queued_spin_lock_slowpath arch/x86/include/asm/paravirt.h:585 [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 include/linux/spinlock.h:187 [inline]
 __raw_spin_lock_bh include/linux/spinlock_api_smp.h:136 [inline]
 _raw_spin_lock_bh+0x139/0x1b0 kernel/locking/spinlock.c:178
 __sock_map_delete net/core/sock_map.c:416 [inline]
 sock_map_delete_elem+0x99/0x130 net/core/sock_map.c:448
 bpf_prog_8a405b5ced52e191+0x42/0x288
 bpf_dispatcher_nop_func include/linux/bpf.h:785 [inline]
 __bpf_prog_run include/linux/filter.h:625 [inline]
 bpf_prog_run include/linux/filter.h:632 [inline]
 __bpf_trace_run kernel/trace/bpf_trace.c:1880 [inline]
 bpf_trace_run2+0xec/0x210 kernel/trace/bpf_trace.c:1917
 __bpf_trace_kfree+0x6f/0x90 include/trace/events/kmem.h:118
 trace_kfree include/trace/events/kmem.h:118 [inline]
 kfree+0x1f3/0x220 mm/slub.c:4569
 free_netdev+0x1db/0x440 net/core/dev.c:10970
 netdev_run_todo+0x7fd/0x9f0 net/core/dev.c:10656
 rtnl_unlock+0xe/0x10 net/core/rtnetlink.c:112
 default_device_exit_batch+0x38f/0x3f0 net/core/dev.c:11639
 ops_exit_list net/core/net_namespace.c:174 [inline]
 setup_net+0x7ec/0xb50 net/core/net_namespace.c:352
 copy_net_ns+0x35c/0x5b0 net/core/net_namespace.c:473
 create_new_namespaces+0x416/0x670 kernel/nsproxy.c:110
 copy_namespaces+0x1d1/0x220 kernel/nsproxy.c:178
 copy_process+0x1174/0x3290 kernel/fork.c:2267
 kernel_clone+0x21e/0x9e0 kernel/fork.c:2662
 __do_sys_clone kernel/fork.c:2788 [inline]
 __se_sys_clone kernel/fork.c:2772 [inline]
 __x64_sys_clone+0x23f/0x290 kernel/fork.c:2772
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x3d/0xb0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x61/0xcb
RIP: 0033:0x7f9f2c79d9f9
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:00007f9f2b41cfe8 EFLAGS: 00000206 ORIG_RAX: 0000000000000038
RAX: ffffffffffffffda RBX: 00007f9f2c92bf80 RCX: 00007f9f2c79d9f9
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000040000000
RBP: 00007f9f2c80b8ee R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000206 R12: 0000000000000000
R13: 0000000000000000 R14: 00007f9f2c92bf80 R15: 00007ffd43061ae8
 </TASK>
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 PID: 457 Comm: syz.1.53 Not tainted 5.15.152-syzkaller-00143-g70e1a731d986 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/27/2024
RIP: 0010:pv_wait_head_or_lock kernel/locking/qspinlock_paravirt.h:434 [inline]
RIP: 0010:__pv_queued_spin_lock_slowpath+0x5ba/0xc40 kernel/locking/qspinlock.c:508
Code: 00 00 49 89 dc c6 03 00 48 8b 44 24 10 0f b6 04 10 84 c0 0f 85 48 01 00 00 48 8b 44 24 08 c6 00 01 bb 00 80 ff ff eb 06 f3 90 <ff> c3 74 5e 41 0f b6 44 15 00 84 c0 75 36 41 80 3f 00 75 ea 4c 89
RSP: 0018:ffffc90000b97360 EFLAGS: 00000206
RAX: 0000000000000000 RBX: 00000000ffffd6a0 RCX: ffffffff8155068f
RDX: dffffc0000000000 RSI: 0000000000000003 RDI: ffff88810e14ed28
RBP: ffffc90000b97450 R08: dffffc0000000000 R09: ffffed1021c29da6
R10: 0000000000000000 R11: dffffc0000000001 R12: ffff8881f7038ad4
R13: 1ffff11021c29da5 R14: 1ffff1103ee00001 R15: ffff88810e14ed28
FS:  00007fd676b716c0(0000) GS:ffff8881f7000000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000000110c2c1f14 CR3: 0000000126060000 CR4: 00000000003506b0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000600
Call Trace:
 <NMI>
 </NMI>
 <TASK>
 pv_queued_spin_lock_slowpath arch/x86/include/asm/paravirt.h:585 [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 include/linux/spinlock.h:187 [inline]
 __raw_spin_lock_bh include/linux/spinlock_api_smp.h:136 [inline]
 _raw_spin_lock_bh+0x139/0x1b0 kernel/locking/spinlock.c:178
 __sock_map_delete net/core/sock_map.c:416 [inline]
 sock_map_delete_elem+0x99/0x130 net/core/sock_map.c:448
 bpf_prog_8a405b5ced52e191+0x42/0x288
 bpf_dispatcher_nop_func include/linux/bpf.h:785 [inline]
 __bpf_prog_run include/linux/filter.h:625 [inline]
 bpf_prog_run include/linux/filter.h:632 [inline]
 __bpf_trace_run kernel/trace/bpf_trace.c:1880 [inline]
 bpf_trace_run2+0xec/0x210 kernel/trace/bpf_trace.c:1917
 __bpf_trace_kfree+0x6f/0x90 include/trace/events/kmem.h:118
 trace_kfree include/trace/events/kmem.h:118 [inline]
 kfree+0x1f3/0x220 mm/slub.c:4569
 sk_psock_free_link include/linux/skmsg.h:420 [inline]
 sock_map_del_link net/core/sock_map.c:160 [inline]
 sock_map_unref+0x352/0x4d0 net/core/sock_map.c:182
 __sock_map_delete net/core/sock_map.c:422 [inline]
 sock_map_delete_elem+0xc1/0x130 net/core/sock_map.c:448
 bpf_prog_8a405b5ced52e191+0x42/0x288
 bpf_dispatcher_nop_func include/linux/bpf.h:785 [inline]
 __bpf_prog_run include/linux/filter.h:625 [inline]
 bpf_prog_run include/linux/filter.h:632 [inline]
 __bpf_trace_run kernel/trace/bpf_trace.c:1880 [inline]
 bpf_trace_run2+0xec/0x210 kernel/trace/bpf_trace.c:1917
 __bpf_trace_kfree+0x6f/0x90 include/trace/events/kmem.h:118
 trace_kfree include/trace/events/kmem.h:118 [inline]
 kfree+0x1f3/0x220 mm/slub.c:4569
 context_destroy security/selinux/ss/context.h:177 [inline]
 security_compute_sid+0x1d7d/0x1f40 security/selinux/ss/services.c:1913
 security_transition_sid+0x7d/0x90 security/selinux/ss/services.c:1936
 socket_sockcreate_sid security/selinux/hooks.c:4677 [inline]
 selinux_socket_create+0x204/0x330 security/selinux/hooks.c:4711
 security_socket_create+0x77/0xb0 security/security.c:2215
 __sock_create+0xd6/0x760 net/socket.c:1441
 sock_create net/socket.c:1537 [inline]
 __sys_socketpair+0x29f/0x6e0 net/socket.c:1637
 __do_sys_socketpair net/socket.c:1690 [inline]
 __se_sys_socketpair net/socket.c:1687 [inline]
 __x64_sys_socketpair+0x9b/0xb0 net/socket.c:1687
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x3d/0xb0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x61/0xcb
RIP: 0033:0x7fd677ef19f9
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:00007fd676b71038 EFLAGS: 00000246 ORIG_RAX: 0000000000000035
RAX: ffffffffffffffda RBX: 00007fd67807ff80 RCX: 00007fd677ef19f9
RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000001
RBP: 00007fd677f5f8ee R08: 0000000000000000 R09: 0000000000000000
R10: 0000000020000000 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 00007fd67807ff80 R15: 00007ffeb27b4148
 </TASK>

Crashes (18):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2024/08/07 23:50 android13-5.15-lts 70e1a731d986 109d2082 .config console log report info ci2-android-5-15-perf BUG: soft lockup in sys_clone
2024/07/30 21:48 android13-5.15-lts d0a6506ecafd 6fde257d .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-15-perf BUG: soft lockup in sys_clone
2024/07/30 19:15 android13-5.15-lts d0a6506ecafd 6fde257d .config console log report info ci2-android-5-15 BUG: soft lockup in sys_clone
2024/07/07 09:51 android13-5.15-lts 9044d25b8ff5 2a40360c .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-15 BUG: soft lockup in sys_clone
2024/06/23 20:13 android13-5.15-lts 85445b5a2107 edc5149a .config console log report syz / log C [disk image] [vmlinux] [kernel image] ci2-android-5-15-perf BUG: soft lockup in sys_clone
2024/06/22 23:24 android13-5.15-lts 85445b5a2107 edc5149a .config console log report syz / log C [disk image] [vmlinux] [kernel image] ci2-android-5-15 BUG: soft lockup in sys_clone
2024/05/26 03:11 android13-5.15-lts 424f92bcbe8f a10a183e .config console log report syz C [disk image] [vmlinux] [kernel image] ci2-android-5-15-perf BUG: soft lockup in sys_clone
2024/05/23 06:10 android13-5.15-lts 5d96939590c0 4d098039 .config console log report syz C [disk image] [vmlinux] [kernel image] ci2-android-5-15 BUG: soft lockup in sys_clone
2024/04/30 16:59 android13-5.15-lts 5d96939590c0 3ce4924c .config console log report syz C ci2-android-5-15-perf BUG: soft lockup in sys_clone
2024/04/28 23:53 android13-5.15-lts 5d96939590c0 07b455f9 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-15-perf BUG: soft lockup in sys_clone
2024/04/28 20:25 android13-5.15-lts 5d96939590c0 07b455f9 .config console log report syz C [disk image] [vmlinux] [kernel image] ci2-android-5-15-perf BUG: soft lockup in sys_clone
2024/04/27 14:41 android13-5.15-lts 5d96939590c0 07b455f9 .config console log report syz C [disk image] [vmlinux] [kernel image] ci2-android-5-15 BUG: soft lockup in sys_clone
2024/04/24 16:38 android13-5.15-lts ad06eaf051cd 8bdc0f22 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-15-perf BUG: soft lockup in sys_clone
2024/04/21 13:22 android13-5.15-lts ad06eaf051cd af24b050 .config console log report syz C [disk image] [vmlinux] [kernel image] ci2-android-5-15-perf BUG: soft lockup in sys_clone
2024/04/21 02:18 android13-5.15-lts ad06eaf051cd af24b050 .config console log report syz C [disk image] [vmlinux] [kernel image] ci2-android-5-15 BUG: soft lockup in sys_clone
2024/04/20 04:12 android13-5.15-lts ad06eaf051cd af24b050 .config console log report syz C [disk image] [vmlinux] [kernel image] ci2-android-5-15 BUG: soft lockup in sys_clone
2024/04/17 15:08 android13-5.15-lts ad06eaf051cd acc528cb .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-15-perf BUG: soft lockup in sys_clone
2024/04/07 21:06 android13-5.15-lts 993bed180178 ca620dd8 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-15-perf BUG: soft lockup in sys_clone
* Struck through repros no longer work on HEAD.