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watchdog: BUG: soft lockup - CPU#1 stuck for 123s! [syz.7.5420:19344] Modules linked in: CPU: 1 PID: 19344 Comm: syz.7.5420 Tainted: G W syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/18/2026 RIP: 0010:trylock_clear_pending kernel/locking/qspinlock_paravirt.h:121 [inline] RIP: 0010:pv_wait_head_or_lock kernel/locking/qspinlock_paravirt.h:435 [inline] RIP: 0010:__pv_queued_spin_lock_slowpath+0x58f/0xb70 kernel/locking/qspinlock.c:508 Code: 42 0f b6 04 38 84 c0 0f 85 c4 01 00 00 48 8b 44 24 08 c6 00 01 41 be 00 80 ff ff eb 07 f3 90 41 ff c6 74 4b 43 0f b6 44 3d 00 <84> c0 75 2e 80 3b 00 75 ea 48 89 df be 02 00 00 00 e8 3b 52 53 00 RSP: 0018:ffffc90000c27600 EFLAGS: 00000286 RAX: 0000000000000004 RBX: ffffffff86edb780 RCX: 0000000086edb700 RDX: 0000000000000001 RSI: 0000000000000003 RDI: ffffffff86edb780 RBP: ffffc90000c276f0 R08: 0000000000000000 R09: 0000000000000004 R10: dffffc0000000000 R11: fffffbfff0ddb6f0 R12: ffff88823ff93000 R13: 1ffffffff0ddb6f0 R14: 00000000ffffb984 R15: dffffc0000000000 FS: 00007fc4418e36c0(0000) GS:ffff8881f7100000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fc442ed6540 CR3: 000000012009b000 CR4: 00000000003506a0 DR0: 0000200000000300 DR1: 0000200000000300 DR2: 0000200000000300 DR3: 0000200000000300 DR6: 00000000ffff0ff0 DR7: 0000000000000600 Call Trace: pv_queued_spin_lock_slowpath arch/x86/include/asm/paravirt.h:554 [inline] queued_spin_lock_slowpath+0x47/0x50 arch/x86/include/asm/qspinlock.h:51 queued_spin_lock include/asm-generic/qspinlock.h:85 [inline] do_raw_spin_lock include/linux/spinlock.h:184 [inline] __raw_spin_lock include/linux/spinlock_api_smp.h:143 [inline] _raw_spin_lock+0xe4/0xf0 kernel/locking/spinlock.c:151 spin_lock include/linux/spinlock.h:355 [inline] __register_sysctl_table+0x7e7/0x1250 fs/proc/proc_sysctl.c:1333 register_net_sysctl+0x2c/0x40 net/sysctl_net.c:121 sysctl_core_net_init+0xe1/0x140 net/core/sysctl_net_core.c:627 ops_init+0x1ba/0x4a0 net/core/net_namespace.c:144 setup_net+0x376/0xb60 net/core/net_namespace.c:345 copy_net_ns+0x314/0x520 net/core/net_namespace.c:486 create_new_namespaces+0x3a2/0x650 kernel/nsproxy.c:110 copy_namespaces+0x1d1/0x220 kernel/nsproxy.c:179 copy_process+0x11d3/0x3300 kernel/fork.c:2271 kernel_clone+0x233/0x960 kernel/fork.c:2650 __do_sys_clone kernel/fork.c:2776 [inline] __se_sys_clone kernel/fork.c:2760 [inline] __x64_sys_clone+0x198/0x210 kernel/fork.c:2760 do_syscall_64+0x31/0x40 arch/x86/entry/common.c:46 entry_SYSCALL_64_after_hwframe+0x61/0xcb RIP: 0033:0x7fc442e88e59 Code: ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 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 e8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007fc4418e2fd8 EFLAGS: 00000202 ORIG_RAX: 0000000000000038 RAX: ffffffffffffffda RBX: 00007fc443101fa0 RCX: 00007fc442e88e59 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 00000000c0126080 RBP: 00007fc442f1ed6f R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000202 R12: 0000000000000000 R13: 00007fc443102038 R14: 00007fc443101fa0 R15: 00007ffd2eaff338 Sending NMI from CPU 1 to CPUs 0: NMI backtrace for cpu 0 CPU: 0 PID: 19326 Comm: syz.3.5416 Tainted: G W syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/18/2026 RIP: 0010:check_kcov_mode kernel/kcov.c:163 [inline] RIP: 0010:write_comp_data kernel/kcov.c:218 [inline] RIP: 0010:__sanitizer_cov_trace_cmp8+0x2e/0x80 kernel/kcov.c:264 Code: 48 8b 45 08 65 48 8b 0d 90 a5 9d 7e 65 8b 15 95 a5 9d 7e f7 c2 00 01 ff 00 74 11 f7 c2 00 01 00 00 74 57 83 b9 dc 0a 00 00 00 <74> 4e 8b 91 b8 0a 00 00 83 fa 03 75 43 48 8b 91 c0 0a 00 00 44 8b RSP: 0018:ffffc90000007098 EFLAGS: 00000046 RAX: ffffffff81559577 RBX: ffff88811e77c158 RCX: ffff8881265093c0 RDX: 0000000000010103 RSI: 0000008a97ae29c0 RDI: 0000008a97ae50d0 RBP: ffffc90000007098 R08: ffffc90000006f17 R09: ffffc90000006f00 R10: dffffc0000000000 R11: fffff52000000de3 R12: 0000000000002710 R13: 0000008a97ae29c0 R14: ffff88811e77c170 R15: 0000008a97ae50d0 FS: 00007fc1ec6496c0(0000) GS:ffff8881f7000000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fd0ec683ff8 CR3: 00000001138c5000 CR4: 00000000003506b0 DR0: 0000200000000300 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000200000000300 DR6: 00000000ffff0ff0 DR7: 0000000000000600 Call Trace: <IRQ> hrtimer_forward+0x107/0x2a0 kernel/time/hrtimer.c:-1 hrtimer_forward_now include/linux/hrtimer.h:504 [inline] perf_swevent_hrtimer+0x4a1/0x5a0 kernel/events/core.c:10494 __run_hrtimer kernel/time/hrtimer.c:1587 [inline] __hrtimer_run_queues+0x34f/0x820 kernel/time/hrtimer.c:1651 hrtimer_interrupt+0x3a6/0xdc0 kernel/time/hrtimer.c:1713 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1095 [inline] __sysvec_apic_timer_interrupt+0xfa/0x3f0 arch/x86/kernel/apic/apic.c:1112 run_sysvec_on_irqstack_cond arch/x86/include/asm/irq_stack.h:91 [inline] sysvec_apic_timer_interrupt+0xba/0xe0 arch/x86/kernel/apic/apic.c:1106 asm_sysvec_apic_timer_interrupt+0x12/0x20 arch/x86/include/asm/idtentry.h:635 RIP: 0010:pagefault_disabled_dec include/linux/uaccess.h:234 [inline] RIP: 0010:pagefault_enable include/linux/uaccess.h:261 [inline] RIP: 0010:clear_highpage include/linux/highmem.h:265 [inline] RIP: 0010:kernel_init_free_pages+0x78/0xf0 mm/page_alloc.c:1287 Code: 7e 49 81 c6 10 0b 00 00 4d 89 f5 49 c1 ed 03 43 0f b6 44 3d 00 84 c0 75 42 41 ff 06 48 89 df e8 1e df c3 00 43 0f b6 44 3d 00 <84> c0 75 44 41 ff 0e bf 01 00 00 00 e8 97 29 aa ff 65 8b 05 bc b4 RSP: 0018:ffffc90000007660 EFLAGS: 00000246 RAX: 0000000000000000 RBX: ffff88816d824000 RCX: 0000000000000000 RDX: 0000000000020000 RSI: 0000000000000100 RDI: ffff88816d825000 RBP: ffffc90000007688 R08: ffffea0005b60037 R09: ffffed102db00000 R10: dffffc0000000000 R11: fffff94000b6c007 R12: 00000000000000dc R13: 1ffff11024ca13da R14: ffff888126509ed0 R15: dffffc0000000000 post_alloc_hook mm/page_alloc.c:2451 [inline] prep_new_page+0xe8/0x180 mm/page_alloc.c:2462 get_page_from_freelist+0x223b/0x23d0 mm/page_alloc.c:4254 __alloc_pages_nodemask+0x290/0x620 mm/page_alloc.c:5384 __alloc_pages include/linux/gfp.h:544 [inline] __alloc_pages_node include/linux/gfp.h:557 [inline] alloc_pages_node include/linux/gfp.h:571 [inline] alloc_pages include/linux/gfp.h:590 [inline] kmalloc_order+0x4c/0x160 mm/slab_common.c:843 kmalloc_order_trace+0x16/0x80 mm/slab_common.c:859 kmalloc_large include/linux/slab.h:484 [inline] __kmalloc_track_caller+0x1d4/0x320 mm/slub.c:4534 __kmalloc_reserve net/core/skbuff.c:144 [inline] pskb_expand_head+0x123/0x1110 net/core/skbuff.c:1653 __skb_cow include/linux/skbuff.h:3276 [inline] skb_cow_head include/linux/skbuff.h:3310 [inline] gre_tap_xmit+0x3c2/0x6e0 net/ipv4/ip_gre.c:743 __netdev_start_xmit include/linux/netdevice.h:4864 [inline] netdev_start_xmit include/linux/netdevice.h:4878 [inline] xmit_one net/core/dev.c:3608 [inline] dev_hard_start_xmit+0x244/0x670 net/core/dev.c:3624 sch_direct_xmit+0x261/0x8d0 net/sched/sch_generic.c:339 qdisc_restart net/sched/sch_generic.c:404 [inline] __qdisc_run+0xa4b/0x13b0 net/sched/sch_generic.c:412 qdisc_run+0x10a/0x300 include/net/pkt_sched.h:126 net_tx_action+0x472/0x530 net/core/dev.c:5016 __do_softirq+0x255/0x563 kernel/softirq.c:309 asm_call_irq_on_stack+0xf/0x20 </IRQ> __run_on_irqstack arch/x86/include/asm/irq_stack.h:26 [inline] run_on_irqstack_cond arch/x86/include/asm/irq_stack.h:77 [inline] do_softirq_own_stack+0x60/0x80 arch/x86/kernel/irq_64.c:77 invoke_softirq kernel/softirq.c:405 [inline] __irq_exit_rcu+0x128/0x150 kernel/softirq.c:435 irq_exit_rcu+0x9/0x10 kernel/softirq.c:447 sysvec_apic_timer_interrupt+0xbf/0xe0 arch/x86/kernel/apic/apic.c:1106 asm_sysvec_apic_timer_interrupt+0x12/0x20 arch/x86/include/asm/idtentry.h:635 RIP: 0010:insert_entry fs/proc/proc_sysctl.c:161 [inline] RIP: 0010:insert_header+0x946/0xdb0 fs/proc/proc_sysctl.c:240 Code: 2e 49 83 c6 40 4c 89 f0 48 c1 e8 03 48 b9 00 00 00 00 00 fc ff df 80 3c 08 00 74 08 4c 89 f7 e8 c0 cd d8 ff 48 89 d8 49 2b 06 <4d> 8d 74 45 00 4c 89 f0 48 c1 e8 03 48 b9 00 00 00 00 00 fc ff df RSP: 0018:ffffc900020676f0 EFLAGS: 00000206 RAX: 0000000000000300 RBX: ffff888124796350 RCX: dffffc0000000000 RDX: ffffc9000550a000 RSI: 00000000000134ce RDI: 00000000000134cf RBP: ffffc90002067798 R08: 0000000000000000 R09: 000000001ea30e00 R10: dffffc0000000000 R11: ffffed10248f2ca1 R12: ffffffff85735120 R13: ffff888112ebc000 R14: ffff888124796040 R15: 0000000000000012 __register_sysctl_table+0x1153/0x1250 fs/proc/proc_sysctl.c:1358 register_net_sysctl+0x2c/0x40 net/sysctl_net.c:121 ipv4_sysctl_init_net+0x1d7/0x3b0 net/ipv4/sysctl_net_ipv4.c:1337 ops_init+0x1ba/0x4a0 net/core/net_namespace.c:144 setup_net+0x376/0xb60 net/core/net_namespace.c:345 copy_net_ns+0x314/0x520 net/core/net_namespace.c:486 create_new_namespaces+0x3a2/0x650 kernel/nsproxy.c:110 copy_namespaces+0x1d1/0x220 kernel/nsproxy.c:179 copy_process+0x11d3/0x3300 kernel/fork.c:2271 kernel_clone+0x233/0x960 kernel/fork.c:2650 __do_sys_clone kernel/fork.c:2776 [inline] __se_sys_clone kernel/fork.c:2760 [inline] __x64_sys_clone+0x198/0x210 kernel/fork.c:2760 do_syscall_64+0x31/0x40 arch/x86/entry/common.c:46 entry_SYSCALL_64_after_hwframe+0x61/0xcb RIP: 0033:0x7fc1edbeee59 Code: ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 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 e8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007fc1ec648fd8 EFLAGS: 00000202 ORIG_RAX: 0000000000000038 RAX: ffffffffffffffda RBX: 00007fc1ede67fa0 RCX: 00007fc1edbeee59 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 00000000c0126080 RBP: 00007fc1edc84d6f R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000202 R12: 0000000000000000 R13: 00007fc1ede68038 R14: 00007fc1ede67fa0 R15: 00007ffc3ceb91c8
| Time | Kernel | Commit | Syzkaller | Config | Log | Report | Syz repro | C repro | VM info | Assets (help?) | Manager | Title |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 2026/06/07 05:25 | android13-5.10-lts | 4a079a5d30eb | cc095639 | .config | console log | report | info | [disk image] [vmlinux] [kernel image] | ci2-android-5-10-perf | BUG: soft lockup in sys_clone |