watchdog: BUG: soft lockup - CPU#1 stuck for 123s! [syz.1.5286:342] Modules linked in: irq event stamp: 10473709 hardirqs last enabled at (10473708): [] irqentry_exit+0x59c/0x620 kernel/entry/common.c:219 hardirqs last disabled at (10473709): [] sysvec_apic_timer_interrupt+0xe/0xc0 arch/x86/kernel/apic/apic.c:1056 softirqs last enabled at (172594): [] __do_softirq kernel/softirq.c:656 [inline] softirqs last enabled at (172594): [] invoke_softirq kernel/softirq.c:496 [inline] softirqs last enabled at (172594): [] __irq_exit_rcu+0x5f/0x150 kernel/softirq.c:723 softirqs last disabled at (172597): [] __do_softirq kernel/softirq.c:656 [inline] softirqs last disabled at (172597): [] invoke_softirq kernel/softirq.c:496 [inline] softirqs last disabled at (172597): [] __irq_exit_rcu+0x5f/0x150 kernel/softirq.c:723 CPU: 1 UID: 0 PID: 342 Comm: syz.1.5286 Not tainted syzkaller #0 PREEMPT(full) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/24/2026 RIP: 0010:orc_ip arch/x86/kernel/unwind_orc.c:81 [inline] RIP: 0010:__orc_find arch/x86/kernel/unwind_orc.c:103 [inline] RIP: 0010:orc_find arch/x86/kernel/unwind_orc.c:238 [inline] RIP: 0010:unwind_next_frame+0x51a/0x23c0 arch/x86/kernel/unwind_orc.c:510 Code: 83 e0 fe 4c 8d 3c 45 00 00 00 00 49 01 ef 4c 89 f8 48 c1 e8 03 48 b9 00 00 00 00 00 fc ff df 0f b6 04 08 84 c0 75 27 49 63 07 <4c> 01 f8 49 8d 4f 04 4c 39 e0 48 0f 46 e9 49 8d 47 fc 48 0f 47 d8 RSP: 0018:ffffc90000a085b8 EFLAGS: 00000246 RAX: fffffffff165a7f1 RBX: ffffffff90067a94 RCX: dffffc0000000000 RDX: ffffffff90067a7c RSI: ffffffff908171a4 RDI: ffffffff8c073da0 RBP: ffffffff90067a7c R08: 0000000000000007 R09: ffffffff8e55a3a0 R10: ffffc90000a08320 R11: ffffffffa0201a0c R12: ffffffff816c222a R13: ffffffff90067a7c R14: ffffc90000a08688 R15: ffffffff90067a88 FS: 00007efd76dee6c0(0000) GS:ffff8881257f6000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f6802e7f179 CR3: 0000000099b2a000 CR4: 00000000003526f0 DR0: 0000200000000300 DR1: 0000200000000300 DR2: 0000200000000300 DR3: 0000200000000300 DR6: 00000000ffff0ff0 DR7: 0000000000000600 Call Trace: arch_stack_walk+0x11b/0x150 arch/x86/kernel/stacktrace.c:25 stack_trace_save+0xa9/0x100 kernel/stacktrace.c:122 kasan_save_stack mm/kasan/common.c:57 [inline] kasan_save_track+0x3e/0x80 mm/kasan/common.c:78 unpoison_slab_object mm/kasan/common.c:340 [inline] __kasan_slab_alloc+0x6c/0x80 mm/kasan/common.c:366 kasan_slab_alloc include/linux/kasan.h:253 [inline] slab_post_alloc_hook mm/slub.c:4953 [inline] slab_alloc_node mm/slub.c:5263 [inline] kmem_cache_alloc_node_noprof+0x427/0x6f0 mm/slub.c:5315 kmalloc_reserve+0xbd/0x290 net/core/skbuff.c:586 __alloc_skb+0x204/0x390 net/core/skbuff.c:690 alloc_skb include/linux/skbuff.h:1383 [inline] ndisc_alloc_skb+0x9f/0x480 net/ipv6/ndisc.c:420 ndisc_send_rs+0x2b5/0x630 net/ipv6/ndisc.c:706 addrconf_rs_timer+0x395/0x6d0 net/ipv6/addrconf.c:4037 call_timer_fn+0x192/0x5a0 kernel/time/timer.c:1748 expire_timers kernel/time/timer.c:1799 [inline] __run_timers kernel/time/timer.c:2373 [inline] __run_timer_base+0x652/0x8b0 kernel/time/timer.c:2385 run_timer_base kernel/time/timer.c:2394 [inline] run_timer_softirq+0xb7/0x170 kernel/time/timer.c:2404 handle_softirqs+0x22a/0x7c0 kernel/softirq.c:622 __do_softirq kernel/softirq.c:656 [inline] invoke_softirq kernel/softirq.c:496 [inline] __irq_exit_rcu+0x5f/0x150 kernel/softirq.c:723 irq_exit_rcu+0x9/0x30 kernel/softirq.c:739 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1056 [inline] sysvec_apic_timer_interrupt+0xa6/0xc0 arch/x86/kernel/apic/apic.c:1056 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:697 RIP: 0010:preempt_schedule_irq+0x48/0xa0 kernel/sched/core.c:7190 Code: 49 be 00 00 00 00 00 fc ff df eb 09 48 f7 03 10 00 00 00 74 53 bf 01 00 00 00 e8 f3 a3 fa f5 e8 3e 20 34 f6 fb bf 01 00 00 00 43 a9 ff ff 9c 58 fa a9 00 02 00 00 74 05 e8 c4 21 34 f6 bf 01 RSP: 0018:ffffc9000b857330 EFLAGS: 00000202 RAX: 0000000000027c43 RBX: 0000000000000000 RCX: 0000000000000001 RDX: 0000000000000000 RSI: ffffffff8dcccacf RDI: 0000000000000001 RBP: 0000000000000000 R08: ffffffff8fef0277 R09: 1ffffffff1fde04e R10: dffffc0000000000 R11: fffffbfff1fde04f R12: 0000000000000000 R13: 0000000000000000 R14: dffffc0000000000 R15: 0000000000000000 irqentry_exit+0x597/0x620 kernel/entry/common.c:216 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:697 RIP: 0010:bpf_tree_comp kernel/bpf/core.c:617 [inline] RIP: 0010:__lt_find include/linux/rbtree_latch.h:115 [inline] RIP: 0010:latch_tree_find include/linux/rbtree_latch.h:210 [inline] RIP: 0010:bpf_ksym_find kernel/bpf/core.c:715 [inline] RIP: 0010:is_bpf_text_address+0x138/0x2b0 kernel/bpf/core.c:748 Code: 2c 5b 48 f7 dd 4d 8d 24 2f 49 81 c4 e0 fd ff ff 4c 89 e0 48 c1 e8 03 42 80 3c 28 00 74 08 4c 89 e7 e8 0c 9e 59 00 4d 8b 24 24 <4c> 89 e7 4c 89 f6 e8 fd a8 f0 ff 4d 39 f4 76 0c e8 93 a6 f0 ff b8 RSP: 0018:ffffc9000b857450 EFLAGS: 00000246 RAX: 1ffff1100c7b6441 RBX: 0000000000000000 RCX: 0000000000080000 RDX: ffffc9001c801000 RSI: 0000000000000a69 RDI: 0000000000000a6a RBP: 0000000000000000 R08: ffffffff81d3ceb6 R09: ffffffff8e55a3a0 R10: ffffc9000b8571c0 R11: ffffffffa0201a0c R12: ffffffffa02036e0 R13: dffffc0000000000 R14: 00007efd75f9aeb9 R15: ffff888063db2428 kernel_text_address+0xa5/0xe0 kernel/extable.c:125 __kernel_text_address+0xd/0x30 kernel/extable.c:79 unwind_get_return_address+0x4d/0x90 arch/x86/kernel/unwind_orc.c:385 arch_stack_walk+0xfb/0x150 arch/x86/kernel/stacktrace.c:26 stack_trace_save+0xa9/0x100 kernel/stacktrace.c:122 kasan_save_stack mm/kasan/common.c:57 [inline] kasan_save_track+0x3e/0x80 mm/kasan/common.c:78 unpoison_slab_object mm/kasan/common.c:340 [inline] __kasan_slab_alloc+0x6c/0x80 mm/kasan/common.c:366 kasan_slab_alloc include/linux/kasan.h:253 [inline] slab_post_alloc_hook mm/slub.c:4953 [inline] slab_alloc_node mm/slub.c:5263 [inline] kmem_cache_alloc_noprof+0x370/0x6e0 mm/slub.c:5270 lsm_file_alloc security/security.c:169 [inline] security_file_alloc+0x34/0x310 security/security.c:2380 init_file+0x93/0x2f0 fs/file_table.c:159 alloc_empty_file+0x6e/0x1d0 fs/file_table.c:241 path_openat+0x11e/0x3e20 fs/namei.c:4782 do_filp_open+0x22d/0x490 fs/namei.c:4823 do_sys_openat2+0x12f/0x220 fs/open.c:1430 do_sys_open fs/open.c:1436 [inline] __do_sys_openat fs/open.c:1452 [inline] __se_sys_openat fs/open.c:1447 [inline] __x64_sys_openat+0x138/0x170 fs/open.c:1447 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xe2/0xf80 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7efd75f9aeb9 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:00007efd76dee028 EFLAGS: 00000246 ORIG_RAX: 0000000000000101 RAX: ffffffffffffffda RBX: 00007efd76215fa0 RCX: 00007efd75f9aeb9 RDX: 0000000000000002 RSI: 0000200000000200 RDI: ffffffffffffffff RBP: 00007efd76008c1f R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007efd76216038 R14: 00007efd76215fa0 R15: 00007fff2efd6758 Sending NMI from CPU 1 to CPUs 0: NMI backtrace for cpu 0 CPU: 0 UID: 0 PID: 344 Comm: syz.1.5286 Not tainted syzkaller #0 PREEMPT(full) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/24/2026 RIP: 0010:trace_event_get_offsets_lock_acquire include/trace/events/lock.h:24 [inline] RIP: 0010:do_perf_trace_lock_acquire include/trace/events/lock.h:24 [inline] RIP: 0010:perf_trace_lock_acquire+0xb2/0x420 include/trace/events/lock.h:24 Code: 00 00 00 00 43 c6 44 37 08 04 c7 84 24 80 00 00 00 00 00 00 00 48 89 74 24 38 48 8d 5e 18 48 89 d8 48 c1 e8 03 42 80 3c 30 00 <74> 08 48 89 df e8 14 d7 8d 00 48 8b 03 48 85 c0 48 c7 c7 00 db ac RSP: 0018:ffffc90000006ec0 EFLAGS: 00000046 RAX: 1ffffffff3450e2b RBX: ffffffff9a287158 RCX: 0000000000000000 RDX: 0000000000000000 RSI: ffffffff9a287140 RDI: ffffffff8e4262c0 RBP: ffffc90000006fa8 R08: 0000000000000000 R09: 0000000000000001 R10: dffffc0000000000 R11: fffffbfff1fde04f R12: ffffffff8e4262c0 R13: ffffffff9a287140 R14: dffffc0000000000 R15: 1ffff92000000de0 FS: 00007efd76dcd6c0(0000) GS:ffff8881256f6000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00005555807834e8 CR3: 0000000099b2a000 CR4: 00000000003526f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000200000000300 DR6: 00000000ffff0ff0 DR7: 0000000000000600 Call Trace: __do_trace_lock_acquire include/trace/events/lock.h:24 [inline] trace_lock_acquire include/trace/events/lock.h:24 [inline] lock_acquire+0x2ea/0x330 kernel/locking/lockdep.c:5831 __raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:110 [inline] _raw_spin_lock_irqsave+0x40/0x60 kernel/locking/spinlock.c:162 debug_object_activate+0x83/0x580 lib/debugobjects.c:818 debug_rcu_head_queue kernel/rcu/rcu.h:236 [inline] kvfree_call_rcu+0xb8/0x440 mm/slab_common.c:1985 cfg80211_update_known_bss+0x830/0x1590 net/wireless/scan.c:1944 __cfg80211_bss_update+0x147/0x2110 net/wireless/scan.c:1989 cfg80211_inform_single_bss_data+0xbc4/0x1ab0 net/wireless/scan.c:2369 cfg80211_inform_bss_data+0x23f/0x3c20 net/wireless/scan.c:3228 cfg80211_inform_bss_frame_data+0x3c7/0x710 net/wireless/scan.c:3319 ieee80211_bss_info_update+0x794/0xa40 net/mac80211/scan.c:230 ieee80211_scan_rx+0x593/0xa20 net/mac80211/scan.c:359 __ieee80211_rx_handle_packet net/mac80211/rx.c:5287 [inline] ieee80211_rx_list+0x2508/0x3050 net/mac80211/rx.c:5544 ieee80211_rx_napi+0x1b1/0x3e0 net/mac80211/rx.c:5567 ieee80211_rx include/net/mac80211.h:5216 [inline] ieee80211_handle_queued_frames+0xe8/0x1e0 net/mac80211/main.c:452 tasklet_action_common+0x2da/0x4b0 kernel/softirq.c:925 handle_softirqs+0x22a/0x7c0 kernel/softirq.c:622 __do_softirq kernel/softirq.c:656 [inline] invoke_softirq kernel/softirq.c:496 [inline] __irq_exit_rcu+0x5f/0x150 kernel/softirq.c:723 irq_exit_rcu+0x9/0x30 kernel/softirq.c:739 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1056 [inline] sysvec_apic_timer_interrupt+0xa6/0xc0 arch/x86/kernel/apic/apic.c:1056 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:697 RIP: 0010:preempt_schedule_irq+0x48/0xa0 kernel/sched/core.c:7190 Code: 49 be 00 00 00 00 00 fc ff df eb 09 48 f7 03 10 00 00 00 74 53 bf 01 00 00 00 e8 f3 a3 fa f5 e8 3e 20 34 f6 fb bf 01 00 00 00 43 a9 ff ff 9c 58 fa a9 00 02 00 00 74 05 e8 c4 21 34 f6 bf 01 RSP: 0018:ffffc90002e67a10 EFLAGS: 00000202 RAX: 00000000009f0d9d RBX: 0000000000000000 RCX: 0000000000000001 RDX: 0000000000000007 RSI: ffffffff8dcccacf RDI: 0000000000000001 RBP: 0000000000000000 R08: ffffffff8fef0277 R09: 1ffffffff1fde04e R10: dffffc0000000000 R11: fffffbfff1fde04f R12: 0000000000000000 R13: 0000000000000000 R14: dffffc0000000000 R15: 0000000000000000 irqentry_exit+0x597/0x620 kernel/entry/common.c:216 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:697 RIP: 0010:put_cpu_partial+0x1db/0x280 mm/slub.c:3960 Code: 5b 41 5c 41 5d 41 5e 41 5f 5d e9 90 e9 ff ff 90 0f 0b 90 e9 15 ff ff ff e8 72 74 74 09 41 f7 c5 00 02 00 00 74 cf fb 4d 85 ff <75> ce 5b 41 5c 41 5d 41 5e 41 5f 5d e9 d4 57 77 09 cc e8 4e 74 74 RSP: 0018:ffffc90002e67b38 EFLAGS: 00000246 RAX: 0000000000000002 RBX: ffff88801e2a4c80 RCX: 0000000000000046 RDX: 0000000000000007 RSI: ffffffff8dcccacf RDI: ffffffff8c073e00 RBP: 0000000000000001 R08: ffffffff8fef0277 R09: 1ffffffff1fde04e R10: dffffc0000000000 R11: fffffbfff1fde04f R12: 0000000000000000 R13: 0000000000000246 R14: ffff8880b86434c0 R15: 0000000000000000 __slab_free+0x294/0x320 mm/slub.c:5952 qlink_free mm/kasan/quarantine.c:163 [inline] qlist_free_all+0x97/0x100 mm/kasan/quarantine.c:179 kasan_quarantine_reduce+0x148/0x160 mm/kasan/quarantine.c:286 __kasan_slab_alloc+0x22/0x80 mm/kasan/common.c:350 kasan_slab_alloc include/linux/kasan.h:253 [inline] slab_post_alloc_hook mm/slub.c:4953 [inline] slab_alloc_node mm/slub.c:5263 [inline] kmem_cache_alloc_noprof+0x370/0x6e0 mm/slub.c:5270 lsm_inode_alloc security/security.c:228 [inline] security_inode_alloc+0x39/0x310 security/security.c:1189 inode_init_always_gfp+0x9ed/0xdc0 fs/inode.c:306 inode_init_always include/linux/fs.h:2883 [inline] alloc_inode+0x82/0x1b0 fs/inode.c:353 new_inode_pseudo include/linux/fs.h:2964 [inline] sock_alloc net/socket.c:637 [inline] __sock_create+0x12d/0x9d0 net/socket.c:1569 sock_create net/socket.c:1663 [inline] __sys_socketpair+0x239/0x560 net/socket.c:1814 __do_sys_socketpair net/socket.c:1863 [inline] __se_sys_socketpair net/socket.c:1860 [inline] __x64_sys_socketpair+0x9b/0xb0 net/socket.c:1860 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xe2/0xf80 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7efd75f9aeb9 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:00007efd76dcd028 EFLAGS: 00000246 ORIG_RAX: 0000000000000035 RAX: ffffffffffffffda RBX: 00007efd76216090 RCX: 00007efd75f9aeb9 RDX: 0000000000000000 RSI: 0000000000000005 RDI: 0000000000000001 RBP: 00007efd76008c1f R08: 0000000000000000 R09: 0000000000000000 R10: 0000200000000b40 R11: 0000000000000246 R12: 0000000000000000 R13: 00007efd76216128 R14: 00007efd76216090 R15: 00007fff2efd6758