watchdog: BUG: soft lockup - CPU#1 stuck for 144s! [syz.2.714:9043] Modules linked in: irq event stamp: 13149125 hardirqs last enabled at (13149124): [] irqentry_exit+0x63/0x90 kernel/entry/common.c:357 hardirqs last disabled at (13149125): [] sysvec_apic_timer_interrupt+0xe/0xc0 arch/x86/kernel/apic/apic.c:1049 softirqs last enabled at (192986): [] __do_softirq kernel/softirq.c:613 [inline] softirqs last enabled at (192986): [] invoke_softirq kernel/softirq.c:453 [inline] softirqs last enabled at (192986): [] __irq_exit_rcu+0xfb/0x220 kernel/softirq.c:680 softirqs last disabled at (192989): [] __do_softirq kernel/softirq.c:613 [inline] softirqs last disabled at (192989): [] invoke_softirq kernel/softirq.c:453 [inline] softirqs last disabled at (192989): [] __irq_exit_rcu+0xfb/0x220 kernel/softirq.c:680 CPU: 1 UID: 0 PID: 9043 Comm: syz.2.714 Not tainted 6.14.0-syzkaller-g8582d9ab3efd #0 PREEMPT(full) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2025 RIP: 0010:trace_lock_acquire include/trace/events/lock.h:24 [inline] RIP: 0010:lock_acquire+0x57/0x2f0 kernel/locking/lockdep.c:5829 Code: 11 65 48 8b 45 00 48 89 44 24 38 e9 2f 02 00 00 65 8b 05 f0 a8 c9 11 83 f8 08 0f 83 b4 01 00 00 89 c0 48 0f a3 05 19 67 c1 0e <73> 16 e8 52 c6 09 00 84 c0 75 0d f6 05 b4 4e ab 0e 01 0f 84 9b 01 RSP: 0018:ffffc90000a08108 EFLAGS: 00000297 RAX: 0000000000000001 RBX: ffffffff8ed3df60 RCX: dffffc0000000000 RDX: 0000000000000000 RSI: ffffffff8ca1af40 RDI: ffffffff8ca1af00 RBP: ffffffff93681020 R08: 0000000000000002 R09: 0000000000000000 R10: ffffc90000a082b0 R11: ffffffff81ae6210 R12: 0000000000000000 R13: 0000000000000002 R14: ffffffff93681020 R15: 0000000000000000 FS: 00007f9df5f896c0(0000) GS:ffff88812509f000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000000000000 CR3: 000000004ed36000 CR4: 00000000003526f0 DR0: 0000200000000300 DR1: 0000200000000300 DR2: 0000200000000300 DR3: 0000200000000300 DR6: 00000000ffff0ff0 DR7: 0000000000000600 Call Trace: rcu_lock_acquire include/linux/rcupdate.h:331 [inline] rcu_read_lock include/linux/rcupdate.h:841 [inline] class_rcu_constructor include/linux/rcupdate.h:1155 [inline] unwind_next_frame+0xd5/0x23b0 arch/x86/kernel/unwind_orc.c:479 arch_stack_walk+0x11e/0x150 arch/x86/kernel/stacktrace.c:25 stack_trace_save+0x11a/0x1d0 kernel/stacktrace.c:122 kasan_save_stack mm/kasan/common.c:47 [inline] kasan_save_track+0x3f/0x80 mm/kasan/common.c:68 poison_kmalloc_redzone mm/kasan/common.c:377 [inline] __kasan_kmalloc+0x9d/0xb0 mm/kasan/common.c:394 kasan_kmalloc include/linux/kasan.h:260 [inline] __kmalloc_cache_noprof+0x236/0x370 mm/slub.c:4362 kmalloc_noprof include/linux/slab.h:905 [inline] kzalloc_noprof include/linux/slab.h:1039 [inline] ref_tracker_alloc+0x159/0x4c0 lib/ref_tracker.c:203 __netdev_tracker_alloc include/linux/netdevice.h:4331 [inline] netdev_hold include/linux/netdevice.h:4360 [inline] dst_init+0xee/0x490 net/core/dst.c:52 dst_alloc+0x14f/0x190 net/core/dst.c:93 ip6_dst_alloc net/ipv6/route.c:342 [inline] icmp6_dst_alloc+0x77/0x420 net/ipv6/route.c:3280 ndisc_send_skb+0x3fd/0x1560 net/ipv6/ndisc.c:493 addrconf_rs_timer+0x380/0x680 net/ipv6/addrconf.c:4033 call_timer_fn+0x189/0x650 kernel/time/timer.c:1789 expire_timers kernel/time/timer.c:1840 [inline] __run_timers kernel/time/timer.c:2414 [inline] __run_timer_base+0x66e/0x8e0 kernel/time/timer.c:2426 run_timer_base kernel/time/timer.c:2435 [inline] run_timer_softirq+0xb7/0x170 kernel/time/timer.c:2445 handle_softirqs+0x2d6/0x9b0 kernel/softirq.c:579 __do_softirq kernel/softirq.c:613 [inline] invoke_softirq kernel/softirq.c:453 [inline] __irq_exit_rcu+0xfb/0x220 kernel/softirq.c:680 irq_exit_rcu+0x9/0x30 kernel/softirq.c:696 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1049 [inline] sysvec_apic_timer_interrupt+0xa6/0xc0 arch/x86/kernel/apic/apic.c:1049 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702 RIP: 0010:finish_task_switch+0x1ea/0x870 kernel/sched/core.c:5250 Code: c9 50 e8 a9 2d 0d 00 48 83 c4 08 4c 89 f7 e8 ad 41 00 00 0f 1f 44 00 00 4c 89 f7 e8 80 57 a0 0a e8 3b 75 39 00 fb 48 8b 5d c0 <48> 8d bb 18 16 00 00 48 89 f8 48 c1 e8 03 49 be 00 00 00 00 00 fc RSP: 0018:ffffc90003b1f008 EFLAGS: 00000286 RAX: e29e7ca7b4f7c600 RBX: ffff88802d578000 RCX: 0000000000000007 RDX: 0000000000000007 RSI: ffffffff8e64727b RDI: ffffffff8ca1af60 RBP: ffffc90003b1f050 R08: ffffffff905fce77 R09: 1ffffffff20bf9ce R10: dffffc0000000000 R11: fffffbfff20bf9cf R12: 1ffff110170e7526 R13: dffffc0000000000 R14: ffff8880b8739b00 R15: ffff8880b873a930 context_switch kernel/sched/core.c:5385 [inline] __schedule+0x1b90/0x5240 kernel/sched/core.c:6767 preempt_schedule_common+0x84/0xd0 kernel/sched/core.c:6947 preempt_schedule+0xe4/0xf0 kernel/sched/core.c:6971 preempt_schedule_thunk+0x16/0x30 arch/x86/entry/thunk.S:12 __raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:152 [inline] _raw_spin_unlock_irqrestore+0x134/0x140 kernel/locking/spinlock.c:194 kasan_quarantine_reduce+0x145/0x170 mm/kasan/quarantine.c:284 __kasan_slab_alloc+0x23/0x80 mm/kasan/common.c:329 kasan_slab_alloc include/linux/kasan.h:250 [inline] slab_post_alloc_hook mm/slub.c:4151 [inline] slab_alloc_node mm/slub.c:4200 [inline] __do_kmalloc_node mm/slub.c:4330 [inline] __kmalloc_noprof+0x238/0x4d0 mm/slub.c:4343 kmalloc_noprof include/linux/slab.h:909 [inline] tomoyo_realpath_from_path+0xcf/0x5e0 security/tomoyo/realpath.c:251 tomoyo_get_realpath security/tomoyo/file.c:151 [inline] tomoyo_check_open_permission+0x25a/0x4f0 security/tomoyo/file.c:771 security_file_open+0xac/0x250 security/security.c:3114 do_dentry_open+0x320/0x1960 fs/open.c:933 vfs_open+0x3b/0x370 fs/open.c:1086 do_open fs/namei.c:3845 [inline] path_openat+0x2caf/0x35d0 fs/namei.c:4004 do_filp_open+0x284/0x4e0 fs/namei.c:4031 do_sys_openat2+0x12b/0x1d0 fs/open.c:1429 do_sys_open fs/open.c:1444 [inline] __do_sys_openat fs/open.c:1460 [inline] __se_sys_openat fs/open.c:1455 [inline] __x64_sys_openat+0x249/0x2a0 fs/open.c:1455 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xf3/0x210 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f9df518e169 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:00007f9df5f89038 EFLAGS: 00000246 ORIG_RAX: 0000000000000101 RAX: ffffffffffffffda RBX: 00007f9df53b5fa0 RCX: 00007f9df518e169 RDX: 0000000000000000 RSI: 0000200000000080 RDI: ffffffffffffff9c RBP: 00007f9df5210a68 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 0000000000000000 R14: 00007f9df53b5fa0 R15: 00007ffcee9d1c38 Sending NMI from CPU 1 to CPUs 0: NMI backtrace for cpu 0 CPU: 0 UID: 0 PID: 9039 Comm: syz.6.713 Not tainted 6.14.0-syzkaller-g8582d9ab3efd #0 PREEMPT(full) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2025 RIP: 0010:rcu_is_watching_curr_cpu include/linux/context_tracking.h:-1 [inline] RIP: 0010:rcu_is_watching+0x44/0xb0 kernel/rcu/tree.c:736 Code: 73 7a 49 bf 00 00 00 00 00 fc ff df 4c 8d 34 dd 10 9c 79 8e 4c 89 f0 48 c1 e8 03 42 80 3c 38 00 74 08 4c 89 f7 e8 4c b5 84 00 <48> c7 c3 58 3b 69 93 49 03 1e 48 89 d8 48 c1 e8 03 42 0f b6 04 38 RSP: 0018:ffffc90000006be0 EFLAGS: 00000046 RAX: 1ffffffff1cf3382 RBX: 0000000000000000 RCX: dffffc0000000000 RDX: 0000000000010100 RSI: ffffffff8ca1af40 RDI: ffffffff8ca1af00 RBP: ffffffff93681020 R08: ffffffff81f5842b R09: 0000000000000000 R10: ffffc90000006848 R11: fffff52000000d0b R12: 0000000000000001 R13: 0000000000000000 R14: ffffffff8e799c10 R15: dffffc0000000000 FS: 0000000000000000(0000) GS:ffff888124f9f000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f30a1ad96c0 CR3: 000000005b694000 CR4: 00000000003526f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000200000000300 DR3: 0000200000000300 DR6: 00000000ffff0ff0 DR7: 0000000000000600 Call Trace: trace_lock_acquire include/trace/events/lock.h:24 [inline] lock_acquire+0x5e/0x2f0 kernel/locking/lockdep.c:5829 __raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:110 [inline] _raw_spin_lock_irqsave+0xd8/0x130 kernel/locking/spinlock.c:162 debug_object_activate+0x190/0x5c0 lib/debugobjects.c:818 debug_hrtimer_activate kernel/time/hrtimer.c:445 [inline] debug_activate kernel/time/hrtimer.c:486 [inline] enqueue_hrtimer+0x30/0x3c0 kernel/time/hrtimer.c:1090 __run_hrtimer kernel/time/hrtimer.c:1808 [inline] __hrtimer_run_queues+0x6d6/0xd40 kernel/time/hrtimer.c:1855 hrtimer_interrupt+0x403/0xa40 kernel/time/hrtimer.c:1917 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1038 [inline] __sysvec_apic_timer_interrupt+0x110/0x420 arch/x86/kernel/apic/apic.c:1055 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1049 [inline] sysvec_apic_timer_interrupt+0x52/0xc0 arch/x86/kernel/apic/apic.c:1049 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702 RIP: 0010:perf_trace_buf_alloc+0x1d9/0x2a0 kernel/trace/trace_event_perf.c:421 Code: 48 89 df e8 c9 48 60 00 48 03 2b 49 63 c4 48 8d 3c 28 48 83 c7 f8 ba 08 00 00 00 31 f6 e8 7f 4b 60 00 48 89 e8 48 83 c4 08 5b <41> 5c 41 5d 41 5e 41 5f 5d c3 cc cc cc cc e8 84 22 f6 ff c6 05 33 RSP: 0018:ffffc900000071f0 EFLAGS: 00000286 RAX: ffffe8ffffa90000 RBX: 000000000000002c RCX: 0000000000000000 RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffffe8ffffa9002c RBP: ffffe8ffffa90000 R08: 0000000000000004 R09: 0000000000000004 R10: ffffe8ffffa90024 R11: fffff91ffff52006 R12: 000000000000002c R13: dffffc0000000000 R14: 0000000000000000 R15: ffff8880b8632608 do_perf_trace_lock_acquire include/trace/events/lock.h:24 [inline] perf_trace_lock_acquire+0x1fe/0x520 include/trace/events/lock.h:24 __do_trace_lock_acquire include/trace/events/lock.h:24 [inline] trace_lock_acquire include/trace/events/lock.h:24 [inline] lock_acquire+0x2c6/0x2f0 kernel/locking/lockdep.c:5829 rcu_lock_acquire include/linux/rcupdate.h:331 [inline] rcu_read_lock include/linux/rcupdate.h:841 [inline] class_rcu_constructor include/linux/rcupdate.h:1155 [inline] unwind_next_frame+0xd5/0x23b0 arch/x86/kernel/unwind_orc.c:479 __unwind_start+0x59a/0x740 arch/x86/kernel/unwind_orc.c:758 unwind_start arch/x86/include/asm/unwind.h:64 [inline] arch_stack_walk+0xe7/0x150 arch/x86/kernel/stacktrace.c:24 stack_trace_save+0x11a/0x1d0 kernel/stacktrace.c:122 kasan_save_stack mm/kasan/common.c:47 [inline] kasan_save_track+0x3f/0x80 mm/kasan/common.c:68 unpoison_slab_object mm/kasan/common.c:319 [inline] __kasan_slab_alloc+0x66/0x80 mm/kasan/common.c:345 kasan_slab_alloc include/linux/kasan.h:250 [inline] slab_post_alloc_hook mm/slub.c:4151 [inline] slab_alloc_node mm/slub.c:4200 [inline] kmem_cache_alloc_node_noprof+0x1f2/0x3b0 mm/slub.c:4252 __alloc_skb+0x1c2/0x480 net/core/skbuff.c:658 alloc_skb include/linux/skbuff.h:1340 [inline] ndisc_alloc_skb+0xa2/0x480 net/ipv6/ndisc.c:423 ndisc_send_rs+0x241/0x5c0 net/ipv6/ndisc.c:707 addrconf_rs_timer+0x380/0x680 net/ipv6/addrconf.c:4033 call_timer_fn+0x189/0x650 kernel/time/timer.c:1789 expire_timers kernel/time/timer.c:1840 [inline] __run_timers kernel/time/timer.c:2414 [inline] __run_timer_base+0x66e/0x8e0 kernel/time/timer.c:2426 run_timer_base kernel/time/timer.c:2435 [inline] run_timer_softirq+0xb7/0x170 kernel/time/timer.c:2445 handle_softirqs+0x2d6/0x9b0 kernel/softirq.c:579 __do_softirq kernel/softirq.c:613 [inline] invoke_softirq kernel/softirq.c:453 [inline] __irq_exit_rcu+0xfb/0x220 kernel/softirq.c:680 irq_exit_rcu+0x9/0x30 kernel/softirq.c:696 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1049 [inline] sysvec_apic_timer_interrupt+0xa6/0xc0 arch/x86/kernel/apic/apic.c:1049 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702 RIP: 0010:schedule_debug kernel/sched/core.c:5956 [inline] RIP: 0010:__schedule+0x1da/0x5240 kernel/sched/core.c:6666 Code: 48 b9 00 00 00 00 00 fc ff df 80 3c 08 00 74 08 48 89 df e8 58 38 fd f5 48 81 3b 9d 6e ac 57 0f 85 3a 23 00 00 83 7c 24 48 00 <7f> 5e 48 8b 44 24 18 48 8d 58 18 48 89 d8 48 c1 e8 03 48 b9 00 00 RSP: 0018:ffffc90003c0ee60 EFLAGS: 00000202 RAX: 1ffff92000781000 RBX: ffffc90003c08000 RCX: dffffc0000000000 RDX: 0000000000000000 RSI: ffffffff8ca1af40 RDI: ffffffff8ca1af00 RBP: ffffc90003c0f090 R08: ffffffff905fce77 R09: 1ffffffff20bf9ce R10: dffffc0000000000 R11: fffffbfff20bf9cf R12: ffff888124f9f000 R13: 1ffff92000781e14 R14: ffff8880b863a600 R15: ffffc90003c0f0c0 preempt_schedule_irq+0xfe/0x1c0 kernel/sched/core.c:7090 irqentry_exit+0x5e/0x90 kernel/entry/common.c:354 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702 RIP: 0010:rcu_read_unlock include/linux/rcupdate.h:-1 [inline] RIP: 0010:pte_unmap include/linux/pgtable.h:136 [inline] RIP: 0010:zap_pte_range mm/memory.c:1761 [inline] RIP: 0010:zap_pmd_range mm/memory.c:1823 [inline] RIP: 0010:zap_pud_range mm/memory.c:1852 [inline] RIP: 0010:zap_p4d_range mm/memory.c:1873 [inline] RIP: 0010:unmap_page_range+0x39ec/0x44d0 mm/memory.c:1894 Code: 43 20 0a e8 06 8b 1d 0a 89 c3 31 ff 89 c6 e8 bb 73 b1 ff 85 db 74 15 e8 f2 df 96 ff 84 c0 74 18 e8 69 6f b1 ff 44 8b 7c 24 0c 65 e8 5d 6f b1 ff 44 8b 7c 24 0c eb 59 e8 d1 8a 1d 0a 89 c3 31 RSP: 0018:ffffc90003c0f220 EFLAGS: 00000293 RAX: ffffffff82114dc7 RBX: 0000000000000001 RCX: ffff888029b98000 RDX: 0000000000000000 RSI: ffffffff8ca1af40 RDI: ffffffff8ca1af00 RBP: ffffc90003c0f5d0 R08: ffffffff82114db5 R09: 1ffff11006b96350 R10: dffffc0000000000 R11: ffffed1006b96351 R12: 00007f67fcf4e000 R13: dffffc0000000000 R14: ffffc90003c0f500 R15: 0000000000000000 unmap_vmas+0x3ce/0x5f0 mm/memory.c:1984 exit_mmap+0x2bc/0xde0 mm/mmap.c:1284 __mmput+0x115/0x420 kernel/fork.c:1379 exit_mm+0x221/0x310 kernel/exit.c:589 do_exit+0x994/0x27f0 kernel/exit.c:940 do_group_exit+0x207/0x2c0 kernel/exit.c:1102 get_signal+0x1696/0x1730 kernel/signal.c:3034 arch_do_signal_or_restart+0x98/0x810 arch/x86/kernel/signal.c:337 exit_to_user_mode_loop kernel/entry/common.c:111 [inline] exit_to_user_mode_prepare include/linux/entry-common.h:329 [inline] __syscall_exit_to_user_mode_work kernel/entry/common.c:207 [inline] syscall_exit_to_user_mode+0xce/0x340 kernel/entry/common.c:218 do_syscall_64+0x100/0x210 arch/x86/entry/syscall_64.c:100 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f67fe78e169 Code: Unable to access opcode bytes at 0x7f67fe78e13f. RSP: 002b:00007f67ff579038 EFLAGS: 00000246 ORIG_RAX: 000000000000002e RAX: fffffffffffffffc RBX: 00007f67fe9b5fa0 RCX: 00007f67fe78e169 RDX: 0000000000000000 RSI: 0000200000000900 RDI: 000000000000000a RBP: 00007f67fe810a68 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 0000000000000000 R14: 00007f67fe9b5fa0 R15: 00007fffcdf8d618