watchdog: BUG: soft lockup - CPU#0 stuck for 121s! [syz.2.220:7146] Modules linked in: irq event stamp: 15020673 hardirqs last enabled at (15020672): [] irqentry_exit+0x74/0x90 kernel/entry/common.c:310 hardirqs last disabled at (15020673): [] sysvec_apic_timer_interrupt+0xe/0xc0 arch/x86/kernel/apic/apic.c:1050 softirqs last enabled at (14909900): [] __do_softirq kernel/softirq.c:613 [inline] softirqs last enabled at (14909900): [] invoke_softirq kernel/softirq.c:453 [inline] softirqs last enabled at (14909900): [] __irq_exit_rcu+0xca/0x1f0 kernel/softirq.c:680 softirqs last disabled at (14909903): [] __do_softirq kernel/softirq.c:613 [inline] softirqs last disabled at (14909903): [] invoke_softirq kernel/softirq.c:453 [inline] softirqs last disabled at (14909903): [] __irq_exit_rcu+0xca/0x1f0 kernel/softirq.c:680 CPU: 0 UID: 0 PID: 7146 Comm: syz.2.220 Not tainted 6.16.0-rc3-syzkaller-gad97cb2ed06a #0 PREEMPT(full) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025 RIP: 0010:is_module_text_address+0x5/0x1e0 kernel/module/main.c:3816 Code: d0 f2 ff e8 3d 67 fc ff 89 e8 5b 41 5e 5d c3 cc cc cc cc cc 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 66 0f 1f 00 55 <41> 57 41 56 41 55 41 54 53 49 89 fe e8 9a 66 fc ff 48 8d 1d 00 00 RSP: 0018:ffffc90000007488 EFLAGS: 00000202 RAX: 0000000000000001 RBX: 00007f4ca138e929 RCX: 2bbfcae2bf34f300 RDX: 0000000000000100 RSI: ffffffff8be2a320 RDI: 00007f4ca138e929 RBP: 0000000000000001 R08: ffffc900000071cf R09: 0000000000000000 R10: ffffc900000071c0 R11: ffffffffa0201a10 R12: ffff888022285a00 R13: ffff888077395140 R14: 0000000000000001 R15: 1ffff92000000ea6 FS: 00007f4ca22126c0(0000) GS:ffff888125c19000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fb9042cfff8 CR3: 0000000079a9a000 CR4: 00000000003526f0 DR0: 0000200000000300 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000600 Call Trace: kernel_text_address+0x94/0xe0 kernel/extable.c:119 __kernel_text_address+0xd/0x40 kernel/extable.c:79 unwind_get_return_address+0x4d/0x90 arch/x86/kernel/unwind_orc.c:369 arch_stack_walk+0xfc/0x150 arch/x86/kernel/stacktrace.c:26 stack_trace_save+0x9c/0xe0 kernel/stacktrace.c:122 kasan_save_stack mm/kasan/common.c:47 [inline] kasan_save_track+0x3e/0x80 mm/kasan/common.c:68 unpoison_slab_object mm/kasan/common.c:319 [inline] __kasan_slab_alloc+0x6c/0x80 mm/kasan/common.c:345 kasan_slab_alloc include/linux/kasan.h:250 [inline] slab_post_alloc_hook mm/slub.c:4148 [inline] slab_alloc_node mm/slub.c:4197 [inline] kmem_cache_alloc_node_noprof+0x1bb/0x3c0 mm/slub.c:4249 __alloc_skb+0x112/0x2d0 net/core/skbuff.c:660 __netdev_alloc_skb+0x108/0x970 net/core/skbuff.c:734 netdev_alloc_skb include/linux/skbuff.h:3414 [inline] dev_alloc_skb include/linux/skbuff.h:3427 [inline] __ieee80211_beacon_get+0xeeb/0x17b0 net/mac80211/tx.c:5471 ieee80211_beacon_get_tim+0xb4/0x2b0 net/mac80211/tx.c:5593 ieee80211_beacon_get include/net/mac80211.h:5638 [inline] mac80211_hwsim_beacon_tx+0x3ce/0x860 drivers/net/wireless/virtual/mac80211_hwsim.c:2319 __iterate_interfaces+0x2a8/0x590 net/mac80211/util.c:761 ieee80211_iterate_active_interfaces_atomic+0xdb/0x180 net/mac80211/util.c:797 mac80211_hwsim_beacon+0xbb/0x1c0 drivers/net/wireless/virtual/mac80211_hwsim.c:2353 __run_hrtimer kernel/time/hrtimer.c:1761 [inline] __hrtimer_run_queues+0x529/0xc60 kernel/time/hrtimer.c:1825 hrtimer_run_softirq+0x187/0x2b0 kernel/time/hrtimer.c:1842 handle_softirqs+0x286/0x870 kernel/softirq.c:579 __do_softirq kernel/softirq.c:613 [inline] invoke_softirq kernel/softirq.c:453 [inline] __irq_exit_rcu+0xca/0x1f0 kernel/softirq.c:680 irq_exit_rcu+0x9/0x30 kernel/softirq.c:696 instr_sysvec_irq_work arch/x86/kernel/irq_work.c:17 [inline] sysvec_irq_work+0xa3/0xc0 arch/x86/kernel/irq_work.c:17 asm_sysvec_irq_work+0x1a/0x20 arch/x86/include/asm/idtentry.h:738 RIP: 0010:schedule_debug kernel/sched/core.c:5962 [inline] RIP: 0010:__schedule+0x1a7/0x4d00 kernel/sched/core.c:6682 Code: 74 08 48 89 df e8 49 1a b4 f6 48 8b 1b 48 89 d8 48 c1 e8 03 42 80 3c 28 00 74 08 48 89 df e8 30 1a b4 f6 48 81 3b 9d 6e ac 57 <0f> 85 26 18 00 00 83 7c 24 70 00 7f 42 49 8d 5e 18 48 89 d8 48 c1 RSP: 0018:ffffc90003f4f7c0 EFLAGS: 00000246 RAX: 1ffff920007e9000 RBX: ffffc90003f48000 RCX: 2bbfcae2bf34f300 RDX: 0000000000000000 RSI: ffffffff8be2a320 RDI: ffffffff8be2a2e0 RBP: ffffc90003f4f9d0 R08: ffffffff8fa1f1f7 R09: 1ffffffff1f43e3e R10: dffffc0000000000 R11: fffffbfff1f43e3f R12: ffff8880b863aac8 R13: dffffc0000000000 R14: ffff888022285a00 R15: ffff888125c19000 preempt_schedule_irq+0xb5/0x150 kernel/sched/core.c:7108 irqentry_exit+0x6f/0x90 kernel/entry/common.c:307 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702 RIP: 0010:check_kcov_mode kernel/kcov.c:185 [inline] RIP: 0010:__sanitizer_cov_trace_pc+0x31/0x70 kernel/kcov.c:217 Code: 24 65 48 8b 0c 25 08 70 a0 92 65 8b 15 28 0c e0 10 81 e2 00 01 ff 00 74 11 81 fa 00 01 00 00 75 35 83 b9 3c 16 00 00 00 74 2c <8b> 91 18 16 00 00 83 fa 02 75 21 48 8b 91 20 16 00 00 48 8b 32 48 RSP: 0018:ffffc90003f4fb48 EFLAGS: 00000246 RAX: ffffffff81745eb2 RBX: 0000000057733ea8 RCX: ffff888022285a00 RDX: 0000000000000000 RSI: 000000000000002e RDI: 0000000000000040 RBP: ffff888057733e38 R08: ffffffff8fa1f1f7 R09: 1ffffffff1f43e3e R10: dffffc0000000000 R11: fffffbfff1f43e3f R12: ffffea0000000000 R13: 0000000000000000 R14: 000000000000002e R15: dffffc0000000000 phys_addr_valid arch/x86/mm/physaddr.h:7 [inline] __phys_addr+0xb2/0x180 arch/x86/mm/physaddr.c:28 virt_to_folio include/linux/mm.h:1178 [inline] virt_to_slab mm/slab.h:211 [inline] ___cache_free+0x23/0xf0 mm/slub.c:4701 qlink_free mm/kasan/quarantine.c:163 [inline] qlist_free_all+0x97/0x140 mm/kasan/quarantine.c:179 kasan_quarantine_reduce+0x148/0x160 mm/kasan/quarantine.c:286 __kasan_slab_alloc+0x22/0x80 mm/kasan/common.c:329 kasan_slab_alloc include/linux/kasan.h:250 [inline] slab_post_alloc_hook mm/slub.c:4148 [inline] slab_alloc_node mm/slub.c:4197 [inline] __kmalloc_cache_noprof+0x1be/0x3d0 mm/slub.c:4354 kmalloc_noprof include/linux/slab.h:905 [inline] kzalloc_noprof include/linux/slab.h:1039 [inline] find_get_pmu_context+0x8b/0x890 kernel/events/core.c:5055 __do_sys_perf_event_open kernel/events/core.c:13597 [inline] __se_sys_perf_event_open+0xbfd/0x1d70 kernel/events/core.c:13333 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xfa/0x3b0 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f4ca138e929 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:00007f4ca2212038 EFLAGS: 00000246 ORIG_RAX: 000000000000012a RAX: ffffffffffffffda RBX: 00007f4ca15b6080 RCX: 00007f4ca138e929 RDX: ffffffffffffffff RSI: 0000000000000000 RDI: 0000200000000100 RBP: 00007f4ca1410b39 R08: 0000000000000009 R09: 0000000000000000 R10: ffffffffffffffff R11: 0000000000000246 R12: 0000000000000000 R13: 0000000000000000 R14: 00007f4ca15b6080 R15: 00007ffc01088f58 Sending NMI from CPU 0 to CPUs 1: NMI backtrace for cpu 1 CPU: 1 UID: 0 PID: 7151 Comm: syz.3.221 Not tainted 6.16.0-rc3-syzkaller-gad97cb2ed06a #0 PREEMPT(full) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025 RIP: 0010:asm_sysvec_apic_timer_interrupt+0x0/0x20 arch/x86/include/asm/idtentry.h:702 Code: 06 ed 6f 0a e9 61 06 00 00 90 f3 0f 1e fa 0f 01 ca fc 6a ff e8 11 05 00 00 48 89 c4 48 89 e7 e8 16 ec 6f 0a e9 41 06 00 00 90 0f 1e fa 0f 01 ca fc 6a ff e8 f1 04 00 00 48 89 c4 48 89 e7 e8 RSP: 0000:ffffc90000a07928 EFLAGS: 00000803 RAX: 0000000000000000 RBX: 0000000000000001 RCX: ffff88802f4c9e00 RDX: 0000000000000100 RSI: 0000000000000100 RDI: 0000000000000000 RBP: ffffc90000a07a01 R08: ffffc90000a07cf0 R09: 0000000000000000 R10: ffffc90000a07cb8 R11: fffff52000140f99 R12: 1ffff11005e99645 R13: dffffc0000000000 R14: ffff88802f4cb22d R15: dffffc0000000000 FS: 00007f8ad07a06c0(0000) GS:ffff888125d19000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f15191b6038 CR3: 000000002447c000 CR4: 00000000003526f0 DR0: 0000200000000300 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000600 Call Trace: RIP: 0010:get_recursion_context kernel/events/internal.h:217 [inline] RIP: 0010:perf_swevent_get_recursion_context+0x8c/0x100 kernel/events/core.c:10577 Code: 0f 95 c5 31 ff 48 89 de e8 81 07 cf ff 44 00 e5 40 0f b6 dd 49 01 de 49 81 c6 2c 14 00 00 4d 89 f4 49 c1 ec 03 43 0f b6 04 3c <84> c0 75 3f 41 0f b6 2e 31 ff 89 ee e8 73 05 cf ff 85 ed 74 0c e8 RSP: 0000:ffffc90000a07950 EFLAGS: 00000a03 perf_trace_buf_alloc+0x59/0x2a0 kernel/trace/trace_event_perf.c:410 do_perf_trace_lock include/trace/events/lock.h:50 [inline] perf_trace_lock+0x18d/0x3b0 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+0x3b2/0x3e0 kernel/locking/lockdep.c:5882 rcu_lock_release include/linux/rcupdate.h:341 [inline] rcu_read_unlock include/linux/rcupdate.h:871 [inline] class_rcu_destructor include/linux/rcupdate.h:1155 [inline] unwind_next_frame+0x19a9/0x2390 arch/x86/kernel/unwind_orc.c:680 __unwind_start+0x5b9/0x760 arch/x86/kernel/unwind_orc.c:758 unwind_start arch/x86/include/asm/unwind.h:64 [inline] arch_stack_walk+0xe4/0x150 arch/x86/kernel/stacktrace.c:24 stack_trace_save+0x9c/0xe0 kernel/stacktrace.c:122 kasan_save_stack+0x3e/0x60 mm/kasan/common.c:47 kasan_record_aux_stack+0xbd/0xd0 mm/kasan/generic.c:548 kvfree_call_rcu+0xbb/0x410 mm/slab_common.c:1962 cfg80211_update_known_bss+0x634/0x1330 net/wireless/scan.c:1925 __cfg80211_bss_update+0x147/0x2120 net/wireless/scan.c:1972 cfg80211_inform_single_bss_data+0xba9/0x1ac0 net/wireless/scan.c:2363 cfg80211_inform_bss_data+0x1fb/0x3b20 net/wireless/scan.c:3222 cfg80211_inform_bss_frame_data+0x3d7/0x730 net/wireless/scan.c:3313 ieee80211_bss_info_update+0x746/0x9e0 net/mac80211/scan.c:226 ieee80211_scan_rx+0x593/0xa20 net/mac80211/scan.c:355 __ieee80211_rx_handle_packet net/mac80211/rx.c:5183 [inline] ieee80211_rx_list+0x22fc/0x2d80 net/mac80211/rx.c:5420 ieee80211_rx_napi+0x1a8/0x3d0 net/mac80211/rx.c:5443 ieee80211_rx include/net/mac80211.h:5185 [inline] ieee80211_handle_queued_frames+0xe8/0x1f0 net/mac80211/main.c:441 tasklet_action_common+0x36c/0x580 kernel/softirq.c:829 handle_softirqs+0x286/0x870 kernel/softirq.c:579 __do_softirq kernel/softirq.c:613 [inline] invoke_softirq kernel/softirq.c:453 [inline] __irq_exit_rcu+0xca/0x1f0 kernel/softirq.c:680 irq_exit_rcu+0x9/0x30 kernel/softirq.c:696 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1050 [inline] sysvec_apic_timer_interrupt+0xa6/0xc0 arch/x86/kernel/apic/apic.c:1050 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702 RIP: 0010:check_preemption_disabled+0x3/0x120 lib/smp_processor_id.c:13 Code: e2 8b 48 c7 c6 20 a3 e2 8b eb 1c 66 66 66 2e 0f 1f 84 00 00 00 00 00 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 55 41 57 <41> 56 53 48 83 ec 10 65 48 8b 05 3e 4e 30 07 48 89 44 24 08 65 8b RSP: 0000:ffffc9000400f888 EFLAGS: 00000282 RAX: 0000000000000001 RBX: 0000000000000000 RCX: 0000000080000000 RDX: ffffc9000cefa000 RSI: ffffffff8be2a320 RDI: ffffffff8be2a2e0 RBP: 0000000000000001 R08: 0000000000000000 R09: ffffffff8230121a R10: dffffc0000000000 R11: ffffed100adfc0b6 R12: 0000000000076a50 R13: dffffc0000000000 R14: ffff88813fffa5d0 R15: 0000000000001000 rcu_lockdep_current_cpu_online+0x37/0x120 kernel/rcu/tree.c:3998 rcu_read_lock_held_common kernel/rcu/update.c:113 [inline] rcu_read_lock_held+0x1e/0x50 kernel/rcu/update.c:349 lookup_page_ext mm/page_ext.c:254 [inline] page_ext_lookup+0xe7/0x180 mm/page_ext.c:520 page_ext_iter_begin include/linux/page_ext.h:132 [inline] __page_table_check_zero+0x18f/0x530 mm/page_table_check.c:139 page_table_check_free include/linux/page_table_check.h:43 [inline] free_pages_prepare mm/page_alloc.c:1249 [inline] __free_frozen_pages+0xc84/0xe70 mm/page_alloc.c:2706 discard_slab mm/slub.c:2717 [inline] __put_partials+0x161/0x1c0 mm/slub.c:3186 put_cpu_partial+0x17c/0x250 mm/slub.c:3261 __slab_free+0x2f7/0x400 mm/slub.c:4513 qlink_free mm/kasan/quarantine.c:163 [inline] qlist_free_all+0x97/0x140 mm/kasan/quarantine.c:179 kasan_quarantine_reduce+0x148/0x160 mm/kasan/quarantine.c:286 __kasan_slab_alloc+0x22/0x80 mm/kasan/common.c:329 kasan_slab_alloc include/linux/kasan.h:250 [inline] slab_post_alloc_hook mm/slub.c:4148 [inline] slab_alloc_node mm/slub.c:4197 [inline] kmem_cache_alloc_lru_noprof+0x1c6/0x3d0 mm/slub.c:4216 __d_alloc+0x31/0x6f0 fs/dcache.c:1690 prepare_anon_dentry fs/libfs.c:2165 [inline] path_from_stashed+0x46c/0x8f0 fs/libfs.c:2232 pidfs_register_pid+0x108/0x1b0 fs/pidfs.c:956 prepare_peercred net/unix/af_unix.c:765 [inline] unix_socketpair+0xdc/0x6f0 net/unix/af_unix.c:1793 __sys_socketpair+0x2b8/0x560 net/socket.c:1763 __do_sys_socketpair net/socket.c:1799 [inline] __se_sys_socketpair net/socket.c:1796 [inline] __x64_sys_socketpair+0x9b/0xb0 net/socket.c:1796 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xfa/0x3b0 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f8acf98e929 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:00007f8ad07a0038 EFLAGS: 00000246 ORIG_RAX: 0000000000000035 RAX: ffffffffffffffda RBX: 00007f8acfbb5fa0 RCX: 00007f8acf98e929 RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000001 RBP: 00007f8acfa10b39 R08: 0000000000000000 R09: 0000000000000000 R10: 0000200000000040 R11: 0000000000000246 R12: 0000000000000000 R13: 0000000000000000 R14: 00007f8acfbb5fa0 R15: 00007fffd1367278