watchdog: BUG: soft lockup - CPU#0 stuck for 144s! [syz.2.195:6583] Modules linked in: irq event stamp: 11504515 hardirqs last enabled at (11504514): [] irqentry_exit+0x59e/0x620 kernel/entry/common.c:242 hardirqs last disabled at (11504515): [] sysvec_apic_timer_interrupt+0xe/0xc0 arch/x86/kernel/apic/apic.c:1056 softirqs last enabled at (8424352): [] __do_softirq kernel/softirq.c:656 [inline] softirqs last enabled at (8424352): [] invoke_softirq kernel/softirq.c:496 [inline] softirqs last enabled at (8424352): [] __irq_exit_rcu+0x5f/0x150 kernel/softirq.c:723 softirqs last disabled at (8424355): [] __do_softirq kernel/softirq.c:656 [inline] softirqs last disabled at (8424355): [] invoke_softirq kernel/softirq.c:496 [inline] softirqs last disabled at (8424355): [] __irq_exit_rcu+0x5f/0x150 kernel/softirq.c:723 CPU: 0 UID: 0 PID: 6583 Comm: syz.2.195 Not tainted syzkaller #0 PREEMPT(full) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2026 RIP: 0010:unwind_next_frame+0x480/0x23c0 arch/x86/kernel/unwind_orc.c:520 Code: 2c 5c 8e 31 d2 84 c0 48 0f 45 d1 48 89 15 68 fb a8 11 48 85 d2 0f 84 40 02 00 00 4c 8d 62 04 4c 8d 6a 05 4c 89 e0 48 c1 e8 03 <0f> b6 04 28 84 c0 0f 85 66 18 00 00 4c 89 e8 48 c1 e8 03 0f b6 04 RSP: 0018:ffffc90000006df8 EFLAGS: 00000a06 RAX: 1ffffffff2299dd7 RBX: ffffffff90992fec RCX: ffffffff90992ff0 RDX: ffffffff914ceeb4 RSI: ffffffff914ceeb4 RDI: ffffffff8c278820 RBP: dffffc0000000000 R08: 0000000000000001 R09: ffffffff8e7603e0 R10: ffffc90000006ba0 R11: ffffffff81aff200 R12: ffffffff914ceeb8 R13: ffffffff914ceeb9 R14: ffffc90000006ec8 R15: ffffffff90992fec FS: 00007fae085f66c0(0000) GS:ffff888125496000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000055557895b4e8 CR3: 000000005ef38000 CR4: 00000000003526f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 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 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:5177 [inline] __kmalloc_noprof+0x35c/0x760 mm/slub.c:5189 kmalloc_noprof include/linux/slab.h:966 [inline] kzalloc_noprof include/linux/slab.h:1204 [inline] cfg80211_inform_single_bss_data+0x934/0x1ab0 net/wireless/scan.c:2345 cfg80211_inform_bss_data+0x266/0x3c40 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+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/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:__schedule+0x1584/0x52b0 kernel/sched/core.c:6864 Code: d8 48 c1 e8 03 42 80 3c 30 00 74 08 48 89 df e8 f2 79 8c f6 4c 89 2b 4c 89 e7 4c 89 ee e8 f4 9f 91 f5 48 89 c7 e8 cc a3 f2 f5 <31> ff 4d 39 ec 40 0f 95 c7 e8 ee ac f2 f5 48 8b 84 24 d8 00 00 00 RSP: 0018:ffffc9001b7ef3c0 EFLAGS: 00000206 RAX: 00000000000c9e87 RBX: ffff8880b863abc8 RCX: 0000000080000001 RDX: 0000000000000007 RSI: ffffffff8deec7f5 RDI: ffffffff8c278880 RBP: ffffc9001b7ef5b0 R08: ffffffff90111eb7 R09: 1ffffffff20223d6 R10: dffffc0000000000 R11: fffffbfff20223d7 R12: ffff88802c05bc80 R13: ffff88802c05bc80 R14: dffffc0000000000 R15: 1ffff110170c7573 preempt_schedule_common+0x82/0xd0 kernel/sched/core.c:7091 preempt_schedule_thunk+0x16/0x30 arch/x86/entry/thunk.S:12 __raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:179 [inline] _raw_spin_unlock_irqrestore+0x74/0x80 kernel/locking/spinlock.c:194 spin_unlock_irqrestore include/linux/spinlock.h:407 [inline] __slab_free+0x211/0x2b0 mm/slub.c:-1 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_kmalloc+0x22/0xb0 mm/kasan/common.c:406 kasan_kmalloc include/linux/kasan.h:263 [inline] __do_kmalloc_node mm/slub.c:5177 [inline] __kmalloc_node_track_caller_noprof+0x4db/0x7b0 mm/slub.c:5285 __kmemdup_nul mm/util.c:64 [inline] kstrdup+0x42/0x100 mm/util.c:84 __kernfs_new_node+0xa9/0x8e0 fs/kernfs/dir.c:633 kernfs_new_node+0x102/0x210 fs/kernfs/dir.c:718 __kernfs_create_file+0x4b/0x2e0 fs/kernfs/file.c:1057 cgroup_add_file kernel/cgroup/cgroup.c:4418 [inline] cgroup_addrm_files+0x8c4/0xc30 kernel/cgroup/cgroup.c:4472 css_populate_dir+0x19e/0x3d0 kernel/cgroup/cgroup.c:1824 cgroup_mkdir+0xd03/0xf80 kernel/cgroup/cgroup.c:6016 kernfs_iop_mkdir+0x211/0x350 fs/kernfs/dir.c:1273 vfs_mkdir+0x413/0x630 fs/namei.c:5233 filename_mkdirat+0x285/0x510 fs/namei.c:5266 __do_sys_mkdirat fs/namei.c:5287 [inline] __se_sys_mkdirat+0x35/0x150 fs/namei.c:5284 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: 0033:0x7fae0a39c629 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:00007fae085f6028 EFLAGS: 00000246 ORIG_RAX: 0000000000000102 RAX: ffffffffffffffda RBX: 00007fae0a615fa0 RCX: 00007fae0a39c629 RDX: 00000000000001ff RSI: 00002000000000c0 RDI: ffffffffffffff9c RBP: 00007fae0a432b39 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007fae0a616038 R14: 00007fae0a615fa0 R15: 00007ffd4a10e008 Sending NMI from CPU 0 to CPUs 1: NMI backtrace for cpu 1 CPU: 1 UID: 0 PID: 6549 Comm: syz.3.184 Not tainted syzkaller #0 PREEMPT(full) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2026 RIP: 0010:arch_static_branch arch/x86/include/asm/jump_label.h:37 [inline] RIP: 0010:native_write_msr arch/x86/include/asm/msr.h:139 [inline] RIP: 0010:wrmsrq arch/x86/include/asm/msr.h:199 [inline] RIP: 0010:native_apic_msr_write+0x39/0x50 arch/x86/include/asm/apic.h:208 Code: 74 2a 83 ff 30 74 25 eb 10 81 ff d0 00 00 00 74 1b 81 ff e0 00 00 00 74 13 c1 ef 04 81 c7 00 08 00 00 89 f9 89 f0 31 d2 0f 30 <66> 90 c3 cc cc cc cc cc 89 f6 31 d2 e9 96 0e 6f 03 66 0f 1f 44 00 RSP: 0018:ffffc90000a085d0 EFLAGS: 00000046 RAX: 00000000000001ae RBX: ffff8880b8723e40 RCX: 0000000000000838 RDX: 0000000000000000 RSI: 00000000000001ae RDI: 0000000000000838 RBP: 0000000000000000 R08: ffffc90000a0834f R09: 0000000000000000 R10: ffffc90000a08340 R11: ffffffff81735570 R12: 0000000010006804 R13: dffffc0000000000 R14: 00000000000001ae R15: 0000000000000020 FS: 00007efe88e006c0(0000) GS:ffff888125596000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000200000fb8000 CR3: 000000005ef48000 CR4: 00000000003526f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000600 Call Trace: apic_write arch/x86/include/asm/apic.h:405 [inline] lapic_next_event+0x11/0x20 arch/x86/kernel/apic/apic.c:418 clockevents_program_event+0x1c9/0x350 kernel/time/clockevents.c:334 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+0x102/0x3d0 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:arch_stack_walk+0x122/0x150 arch/x86/kernel/stacktrace.c:24 Code: 58 09 00 48 85 c0 74 24 48 89 df 48 89 c6 4d 89 f3 2e e8 c9 8e 93 1e 84 c0 74 11 4c 89 ff e8 c5 59 09 00 83 bd 78 ff ff ff 00 <75> cf 65 48 8b 05 e4 f7 ab 11 48 3b 45 d8 75 12 48 83 c4 68 5b 41 RSP: 0018:ffffc90000a08848 EFLAGS: 00000202 RAX: 0000000000a08801 RBX: ffffc90000a08900 RCX: 0000000000000101 RDX: 0000000000000003 RSI: ffffffff8e15b390 RDI: ffff8880594fdac0 RBP: ffffc90000a088d0 R08: ffffc90000a0852f R09: 0000000000000000 R10: ffffc90000a08520 R11: ffffffffa0201a48 R12: ffff8880594fdac0 R13: 0000000000000000 R14: ffffffff81aff200 R15: ffffc90000a08848 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:2670 [inline] slab_free mm/slub.c:6082 [inline] kmem_cache_free+0x180/0x610 mm/slub.c:6212 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+0x529/0xc30 kernel/time/hrtimer.c:1849 hrtimer_run_softirq+0x182/0x5a0 kernel/time/hrtimer.c:1866 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:7234 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 83 59 f1 f5 e8 fe 9c 2a f6 fb bf 01 00 00 00 e3 a6 ff ff 9c 58 fa a9 00 02 00 00 74 05 e8 84 9e 2a f6 bf 01 RSP: 0018:ffffc9001b61f670 EFLAGS: 00000202 RAX: 0000000000b3f629 RBX: 0000000000000000 RCX: 0000000000000001 RDX: 0000000000000007 RSI: ffffffff8deec7f5 RDI: 0000000000000001 RBP: 0000000000000000 R08: ffffffff90111eb7 R09: 1ffffffff20223d6 R10: dffffc0000000000 R11: fffffbfff20223d7 R12: 0000000000000000 R13: 0000000000000000 R14: dffffc0000000000 R15: 0000000000000000 irqentry_exit+0x599/0x620 kernel/entry/common.c:239 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:697 RIP: 0010:count_memcg_events_mm include/linux/memcontrol.h:985 [inline] RIP: 0010:count_memcg_event_mm+0xe8/0x260 include/linux/memcontrol.h:994 Code: ff 49 81 c6 70 0a 00 00 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 8b 6f 1a 00 4d 8b 36 b3 0d 8d 09 41 89 c7 31 ff 89 c6 e8 07 fd b0 ff 45 85 ff 74 21 RSP: 0018:ffffc9001b61f798 EFLAGS: 00000246 RAX: 1ffff1100f8d38f6 RBX: ffffffff8213b981 RCX: dffffc0000000000 RDX: ffffc9000ca65000 RSI: 000000000007ffff RDI: 0000000000080000 RBP: 0000000000000017 R08: ffffffff8213b981 R09: ffffffff8e7603e0 R10: ffffc9001b61f4a0 R11: ffffffffa0201a48 R12: dffffc0000000000 R13: ffff8880594fdac0 R14: ffff8880594fdac0 R15: 0000000000000001 mm_account_fault mm/memory.c:6480 [inline] handle_mm_fault+0x2c01/0x3310 mm/memory.c:6641 do_user_addr_fault+0x75b/0x1340 arch/x86/mm/fault.c:1385 handle_page_fault arch/x86/mm/fault.c:1474 [inline] exc_page_fault+0x6a/0xc0 arch/x86/mm/fault.c:1527 asm_exc_page_fault+0x26/0x30 arch/x86/include/asm/idtentry.h:618 RIP: 0010:rep_movs_alternative+0x4a/0x90 arch/x86/lib/copy_user_64.S:74 Code: 49 04 00 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 00 48 8b 06 48 89 07 48 83 c6 08 48 83 c7 08 83 e9 08 74 db 83 f9 08 73 e8 eb c5 a4 e9 4f 49 04 00 48 8b 06 48 89 07 48 8d 47 08 48 83 e0 f8 48 RSP: 0018:ffffc9001b61fb98 EFLAGS: 00050206 RAX: 00007ffffffff001 RBX: 00000000000029fd RCX: 0000000000001c46 RDX: 0000000000000001 RSI: 0000200000fb8000 RDI: ffff888059d48db7 RBP: ffffc9001b61fcc0 R08: 0000000000000004 R09: 0000000000000005 R10: dffffc0000000000 R11: ffffed100b3a953f R12: 1ffff1100b08be07 R13: 1ffff920036c3f84 R14: ffff888059d48000 R15: 0000200000fb7249 copy_user_generic arch/x86/include/asm/uaccess_64.h:126 [inline] raw_copy_from_user arch/x86/include/asm/uaccess_64.h:141 [inline] _inline_copy_from_user include/linux/uaccess.h:185 [inline] _copy_from_user+0x7a/0xb0 lib/usercopy.c:18 copy_from_user include/linux/uaccess.h:223 [inline] generic_map_update_batch+0x69a/0x990 kernel/bpf/syscall.c:2029 bpf_map_do_batch+0x39b/0x630 kernel/bpf/syscall.c:5669 __sys_bpf+0x7c1/0x950 kernel/bpf/syscall.c:-1 __do_sys_bpf kernel/bpf/syscall.c:6342 [inline] __se_sys_bpf kernel/bpf/syscall.c:6340 [inline] __x64_sys_bpf+0x7c/0x90 kernel/bpf/syscall.c:6340 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: 0033:0x7efe87f9c629 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:00007efe88e00028 EFLAGS: 00000246 ORIG_RAX: 0000000000000141 RAX: ffffffffffffffda RBX: 00007efe88215fa0 RCX: 00007efe87f9c629 RDX: 0000000000000038 RSI: 0000200000000300 RDI: 000000000000001a RBP: 00007efe88032b39 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007efe88216038 R14: 00007efe88215fa0 R15: 00007ffd3fbf94e8