watchdog: BUG: soft lockup - CPU#1 stuck for 144s! [syz.6.2423:17257] Modules linked in: irq event stamp: 11312981 hardirqs last enabled at (11312980): [] irqentry_exit+0x59e/0x620 kernel/entry/common.c:242 hardirqs last disabled at (11312981): [] sysvec_apic_timer_interrupt+0xe/0xc0 arch/x86/kernel/apic/apic.c:1056 softirqs last enabled at (4250828): [] __do_softirq kernel/softirq.c:656 [inline] softirqs last enabled at (4250828): [] invoke_softirq kernel/softirq.c:496 [inline] softirqs last enabled at (4250828): [] __irq_exit_rcu+0x5f/0x150 kernel/softirq.c:723 softirqs last disabled at (4250831): [] __do_softirq kernel/softirq.c:656 [inline] softirqs last disabled at (4250831): [] invoke_softirq kernel/softirq.c:496 [inline] softirqs last disabled at (4250831): [] __irq_exit_rcu+0x5f/0x150 kernel/softirq.c:723 CPU: 1 UID: 0 PID: 17257 Comm: syz.6.2423 Not tainted syzkaller #0 PREEMPT(full) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/18/2026 RIP: 0010:check_kcov_mode kernel/kcov.c:183 [inline] RIP: 0010:__sanitizer_cov_trace_pc+0x2e/0x70 kernel/kcov.c:217 Code: 48 8b 04 24 65 48 8b 0d 28 1b 57 11 65 8b 15 49 1b 57 11 81 e2 00 01 ff 00 74 11 81 fa 00 01 00 00 75 35 83 b9 a4 16 00 00 00 <74> 2c 8b 91 80 16 00 00 83 fa 02 75 21 48 8b 91 88 16 00 00 48 8b RSP: 0018:ffffc90000a07c20 EFLAGS: 00000246 RAX: ffffffff81f9c2c5 RBX: 0000000000000001 RCX: ffff888057fdbd00 RDX: 0000000000000100 RSI: 000000000000002c RDI: ffffe8ffffde20f8 RBP: dffffc0000000000 R08: 0000000000000001 R09: ffff8880b8733438 R10: dffffc0000000000 R11: fffff91ffffbc424 R12: ffffe8ffffde20f8 R13: ffffffff8e62a680 R14: ffff8880b8733438 R15: 1ffff92000140f98 FS: 00007f987721f6c0(0000) GS:ffff888125553000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f3a66bd1d58 CR3: 000000005ac22000 CR4: 00000000003526f0 DR0: 0000200000000300 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000200000000300 DR6: 00000000ffff0ff0 DR7: 0000000000000600 Call Trace: perf_trace_run_bpf_submit+0x35/0x170 kernel/events/core.c:11326 do_perf_trace_lock include/trace/events/lock.h:50 [inline] perf_trace_lock+0x32d/0x410 include/trace/events/lock.h:50 __do_trace_lock_release include/trace/events/lock.h:69 [inline] trace_lock_release include/trace/events/lock.h:69 [inline] lock_release+0x392/0x3d0 kernel/locking/lockdep.c:5879 rcu_lock_release include/linux/rcupdate.h:310 [inline] rcu_read_unlock include/linux/rcupdate.h:869 [inline] class_rcu_destructor include/linux/rcupdate.h:1181 [inline] unwind_next_frame+0x1aaa/0x23c0 arch/x86/kernel/unwind_orc.c:695 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 poison_kmalloc_redzone mm/kasan/common.c:398 [inline] __kasan_kmalloc+0x93/0xb0 mm/kasan/common.c:415 kasan_kmalloc include/linux/kasan.h:263 [inline] __do_kmalloc_node mm/slub.c:5260 [inline] __kmalloc_noprof+0x35c/0x760 mm/slub.c:5272 kmalloc_noprof include/linux/slab.h:954 [inline] kzalloc_noprof include/linux/slab.h:1188 [inline] cfg80211_inform_single_bss_data+0x952/0x1b70 net/wireless/scan.c:2344 cfg80211_inform_bss_data+0x266/0x3c40 net/wireless/scan.c:3226 cfg80211_inform_bss_frame_data+0x3c7/0x760 net/wireless/scan.c:3317 ieee80211_bss_info_update+0x794/0xa40 net/mac80211/scan.c:230 ieee80211_scan_rx+0x552/0xa40 net/mac80211/scan.c:364 __ieee80211_rx_handle_packet net/mac80211/rx.c:5305 [inline] ieee80211_rx_list+0x29e5/0x3710 net/mac80211/rx.c:5588 ieee80211_rx_napi+0x1b1/0x3e0 net/mac80211/rx.c:5611 ieee80211_rx include/net/mac80211.h:5267 [inline] ieee80211_handle_queued_frames+0xe8/0x1e0 net/mac80211/main.c:452 tasklet_action_common+0x2da/0x4b0 kernel/softirq.c:925 handle_softirqs+0x22a/0x870 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:do_perf_trace_lock include/trace/events/lock.h:50 [inline] RIP: 0010:perf_trace_lock+0x2d0/0x410 include/trace/events/lock.h:50 Code: 55 ff 48 8b 74 24 28 e8 ee e2 8f 00 4e 8d 24 2b 49 83 c4 17 4c 89 e0 48 c1 e8 03 49 bd 00 00 00 00 00 fc ff df 42 0f b6 04 28 <84> c0 0f 85 11 01 00 00 41 c6 04 24 00 48 83 c3 10 48 89 d8 48 c1 RSP: 0018:ffffc9000c2d7580 EFLAGS: 00000a03 RAX: 0000000000000000 RBX: ffffe8ffffdd9000 RCX: ffffffff81a0db82 RDX: 000000000000000d RSI: ffffffff8bce0160 RDI: ffffe8ffffdd9018 RBP: ffffc9000c2d7680 R08: 646165725f756372 R09: 6b636f6c5f646165 R10: dffffc0000000000 R11: fffff91ffffbb205 R12: ffffe8ffffdd9025 R13: dffffc0000000000 R14: 000000000000002c R15: 1ffff9200185aeb8 __do_trace_lock_release include/trace/events/lock.h:69 [inline] trace_lock_release include/trace/events/lock.h:69 [inline] lock_release+0x392/0x3d0 kernel/locking/lockdep.c:5879 rcu_lock_release include/linux/rcupdate.h:310 [inline] rcu_read_unlock include/linux/rcupdate.h:869 [inline] class_rcu_destructor include/linux/rcupdate.h:1181 [inline] unwind_next_frame+0x1aaa/0x23c0 arch/x86/kernel/unwind_orc.c:695 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 poison_kmalloc_redzone mm/kasan/common.c:398 [inline] __kasan_kmalloc+0x93/0xb0 mm/kasan/common.c:415 kasan_kmalloc include/linux/kasan.h:263 [inline] __do_kmalloc_node mm/slub.c:5260 [inline] __kmalloc_node_noprof+0x4e0/0x7c0 mm/slub.c:5266 kmalloc_node_noprof include/linux/slab.h:1081 [inline] __bpf_map_area_alloc kernel/bpf/syscall.c:398 [inline] bpf_map_area_alloc+0x64/0x170 kernel/bpf/syscall.c:411 bpf_ringbuf_area_alloc kernel/bpf/ringbuf.c:123 [inline] bpf_ringbuf_alloc+0x37/0x5f0 kernel/bpf/ringbuf.c:176 ringbuf_map_alloc+0x1f1/0x330 kernel/bpf/ringbuf.c:219 map_create+0xafd/0x16a0 kernel/bpf/syscall.c:1500 __sys_bpf+0x6e1/0x950 kernel/bpf/syscall.c:6234 __do_sys_bpf kernel/bpf/syscall.c:6365 [inline] __se_sys_bpf kernel/bpf/syscall.c:6363 [inline] __x64_sys_bpf+0x7c/0x90 kernel/bpf/syscall.c:6363 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0x14d/0xf80 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f987639c819 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:00007f987721f028 EFLAGS: 00000246 ORIG_RAX: 0000000000000141 RAX: ffffffffffffffda RBX: 00007f9876616090 RCX: 00007f987639c819 RDX: 0000000000000050 RSI: 0000200000000340 RDI: 0000000000000000 RBP: 00007f9876432c91 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007f9876616128 R14: 00007f9876616090 R15: 00007fff2202e7a8 Sending NMI from CPU 1 to CPUs 0: NMI backtrace for cpu 0 CPU: 0 UID: 0 PID: 17237 Comm: syz.1.2419 Not tainted syzkaller #0 PREEMPT(full) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/18/2026 RIP: 0010:strlen+0x3f/0x70 lib/string.c:420 Code: 00 00 00 00 fc ff df 48 89 fb 49 89 c7 48 89 d8 48 c1 e8 03 42 0f b6 04 30 84 c0 75 11 48 ff c3 49 8d 47 01 42 80 7c 3f 01 00 <75> de eb 19 89 d9 80 e1 07 38 c1 7c e6 49 89 fc 48 89 df e8 89 e1 RSP: 0018:ffffc900000071b8 EFLAGS: 00000006 RAX: 000000000000000f RBX: ffffffff8bcf6370 RCX: 0000000000000000 RDX: ffffffff81b2dbd5 RSI: ffffffff9a2c7508 RDI: ffffffff8bcf6360 RBP: ffffc900000072d0 R08: ffffffff81b2dbd5 R09: ffffffff9a2c7508 R10: 0000000000000003 R11: 0000000000010100 R12: dffffc0000000000 R13: ffffffff81b2dbd5 R14: dffffc0000000000 R15: 000000000000000e FS: 00007fafc2b866c0(0000) GS:ffff888125453000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000055557faed4e8 CR3: 000000005e630000 CR4: 00000000003526f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000200000000300 DR6: 00000000ffff0ff0 DR7: 0000000000000600 Call Trace: __fortify_strlen include/linux/fortify-string.h:266 [inline] trace_event_get_offsets_lock include/trace/events/lock.h:50 [inline] do_perf_trace_lock include/trace/events/lock.h:50 [inline] perf_trace_lock+0xd5/0x410 include/trace/events/lock.h:50 __do_trace_lock_release include/trace/events/lock.h:69 [inline] trace_lock_release include/trace/events/lock.h:69 [inline] lock_release+0x392/0x3d0 kernel/locking/lockdep.c:5879 seqcount_lockdep_reader_access+0x64/0x100 include/linux/seqlock.h:74 ktime_get+0x45/0x200 kernel/time/timekeeping.c:824 clockevents_program_event+0xe8/0x350 kernel/time/clockevents.c:326 hrtimer_interrupt+0xb08/0x1010 kernel/time/hrtimer.c:1924 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1045 [inline] __sysvec_apic_timer_interrupt+0x102/0x460 arch/x86/kernel/apic/apic.c:1062 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1056 [inline] sysvec_apic_timer_interrupt+0x52/0xc0 arch/x86/kernel/apic/apic.c:1056 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:697 RIP: 0010:perf_fetch_caller_regs include/linux/perf_event.h:1597 [inline] RIP: 0010:do_perf_trace_lock include/trace/events/lock.h:50 [inline] RIP: 0010:perf_trace_lock+0x1cb/0x410 include/trace/events/lock.h:50 Code: 85 c0 0f 84 88 01 00 00 48 89 c3 4c 89 e1 4c 8b 64 24 60 48 8b 55 08 49 8d bc 24 80 00 00 00 48 89 f8 48 c1 e8 03 80 3c 08 00 <74> 0f 48 89 54 24 20 e8 09 e1 8f 00 48 8b 54 24 20 49 89 94 24 80 RSP: 0018:ffffc90000007600 EFLAGS: 00000246 RAX: 1ffff110170c6697 RBX: ffffe8ffffce20f8 RCX: dffffc0000000000 RDX: ffffffff81a1c022 RSI: 0000000000000000 RDI: ffff8880b86334b8 RBP: ffffc90000007700 R08: 0000000000000004 R09: 0000000000000004 R10: ffffe8ffffce211c R11: fffff91ffff9c425 R12: ffff8880b8633438 R13: 000000000000000d R14: 000000000000002c R15: 1ffff92000000ec8 __do_trace_lock_release include/trace/events/lock.h:69 [inline] trace_lock_release include/trace/events/lock.h:69 [inline] lock_release+0x392/0x3d0 kernel/locking/lockdep.c:5879 rcu_lock_release include/linux/rcupdate.h:310 [inline] rcu_read_unlock include/linux/rcupdate.h:869 [inline] class_rcu_destructor include/linux/rcupdate.h:1181 [inline] unwind_next_frame+0x1aaa/0x23c0 arch/x86/kernel/unwind_orc.c:695 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 kasan_save_free_info+0x46/0x50 mm/kasan/generic.c:584 poison_slab_object mm/kasan/common.c:253 [inline] __kasan_slab_free+0x5c/0x80 mm/kasan/common.c:285 kasan_slab_free include/linux/kasan.h:235 [inline] slab_free_hook mm/slub.c:2685 [inline] slab_free mm/slub.c:6165 [inline] kmem_cache_free+0x187/0x630 mm/slub.c:6295 mac80211_hwsim_beacon_tx+0x3e8/0x870 drivers/net/wireless/virtual/mac80211_hwsim.c:2365 __iterate_interfaces+0x2ab/0x590 net/mac80211/util.c:760 ieee80211_iterate_active_interfaces_atomic+0xdb/0x180 net/mac80211/util.c:796 mac80211_hwsim_beacon+0xbb/0x180 drivers/net/wireless/virtual/mac80211_hwsim.c:2395 __run_hrtimer kernel/time/hrtimer.c:1785 [inline] __hrtimer_run_queues+0x53a/0xcc0 kernel/time/hrtimer.c:1849 hrtimer_run_softirq+0x182/0x5a0 kernel/time/hrtimer.c:1866 handle_softirqs+0x22a/0x870 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:trace_call_bpf+0xad/0xb70 kernel/trace/bpf_trace.c:115 Code: c7 40 52 d3 8b be 71 00 00 00 31 d2 e8 8c 0e c4 ff 48 c7 c7 60 52 d3 8b e8 f0 cf de 09 bb 01 00 00 00 65 0f c1 1d 33 71 4c 11 <31> ff 89 de e8 2a 3b f4 ff e8 75 f9 d9 ff 48 8d 05 00 00 00 00 48 RSP: 0018:ffffc9000c21ed80 EFLAGS: 00000202 RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000080000001 RDX: 0000000000000000 RSI: ffffffff8bd35260 RDI: ffffffff8c27d400 RBP: ffffc9000c21ee98 R08: 0000000000000001 R09: ffff8880b8633390 R10: dffffc0000000000 R11: fffff91ffff9b205 R12: ffffe8ffffcd9000 R13: dffffc0000000000 R14: 1ffff92001843dc0 R15: ffffffff8e62a680 perf_trace_run_bpf_submit+0x78/0x170 kernel/events/core.c:11329 do_perf_trace_lock include/trace/events/lock.h:50 [inline] perf_trace_lock+0x32d/0x410 include/trace/events/lock.h:50 __do_trace_lock_release include/trace/events/lock.h:69 [inline] trace_lock_release include/trace/events/lock.h:69 [inline] lock_release+0x392/0x3d0 kernel/locking/lockdep.c:5879 rcu_lock_release include/linux/rcupdate.h:310 [inline] rcu_read_unlock include/linux/rcupdate.h:869 [inline] class_rcu_destructor include/linux/rcupdate.h:1181 [inline] unwind_next_frame+0x1aaa/0x23c0 arch/x86/kernel/unwind_orc.c:695 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 kasan_save_free_info+0x46/0x50 mm/kasan/generic.c:584 poison_slab_object mm/kasan/common.c:253 [inline] __kasan_slab_free+0x5c/0x80 mm/kasan/common.c:285 kasan_slab_free include/linux/kasan.h:235 [inline] slab_free_hook mm/slub.c:2685 [inline] slab_free mm/slub.c:6165 [inline] kfree+0x1c1/0x630 mm/slub.c:6483 free_func_state kernel/bpf/verifier.c:1694 [inline] free_verifier_state+0xaf/0x230 kernel/bpf/verifier.c:1710 pop_stack kernel/bpf/verifier.c:2119 [inline] free_states kernel/bpf/verifier.c:25028 [inline] do_check_common+0x230b/0x2dc0 kernel/bpf/verifier.c:25196 do_check_main kernel/bpf/verifier.c:25275 [inline] bpf_check+0x242f/0x1cd90 kernel/bpf/verifier.c:26667 bpf_prog_load+0x1484/0x1ae0 kernel/bpf/syscall.c:3082 __sys_bpf+0x618/0x950 kernel/bpf/syscall.c:6252 __do_sys_bpf kernel/bpf/syscall.c:6365 [inline] __se_sys_bpf kernel/bpf/syscall.c:6363 [inline] __x64_sys_bpf+0x7c/0x90 kernel/bpf/syscall.c:6363 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0x14d/0xf80 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7fafc1d9c819 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:00007fafc2b86028 EFLAGS: 00000246 ORIG_RAX: 0000000000000141 RAX: ffffffffffffffda RBX: 00007fafc2015fa0 RCX: 00007fafc1d9c819 RDX: 0000000000000048 RSI: 00002000000054c0 RDI: 0000000000000005 RBP: 00007fafc1e32c91 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007fafc2016038 R14: 00007fafc2015fa0 R15: 00007fff049db6c8