watchdog: BUG: soft lockup - CPU#1 stuck for 144s! [syz.1.169:6499] Modules linked in: irq event stamp: 11131511 hardirqs last enabled at (11131510): [] irqentry_exit+0x74/0x90 kernel/entry/common.c:200 hardirqs last disabled at (11131511): [] sysvec_apic_timer_interrupt+0xe/0xc0 arch/x86/kernel/apic/apic.c:1050 softirqs last enabled at (9408794): [] __do_softirq kernel/softirq.c:613 [inline] softirqs last enabled at (9408794): [] invoke_softirq kernel/softirq.c:453 [inline] softirqs last enabled at (9408794): [] __irq_exit_rcu+0xca/0x1f0 kernel/softirq.c:680 softirqs last disabled at (9408797): [] __do_softirq kernel/softirq.c:613 [inline] softirqs last disabled at (9408797): [] invoke_softirq kernel/softirq.c:453 [inline] softirqs last disabled at (9408797): [] __irq_exit_rcu+0xca/0x1f0 kernel/softirq.c:680 CPU: 1 UID: 0 PID: 6499 Comm: syz.1.169 Not tainted syzkaller #0 PREEMPT(full) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/12/2025 RIP: 0010:perf_fetch_caller_regs include/linux/perf_event.h:1589 [inline] RIP: 0010:do_perf_trace_lock include/trace/events/lock.h:50 [inline] RIP: 0010:perf_trace_lock+0x1cc/0x3b0 include/trace/events/lock.h:50 Code: 60 4c 89 f9 4c 8b 7d 08 49 8d bc 24 80 00 00 00 48 89 f8 48 c1 e8 03 80 3c 08 00 74 05 e8 8c 77 86 00 4d 89 bc 24 80 00 00 00 <49> 8d bc 24 98 00 00 00 48 89 f8 48 c1 e8 03 49 bf 00 00 00 00 00 RSP: 0018:ffffc90000a07860 EFLAGS: 00000246 RAX: 1ffff110170e6555 RBX: ffffe8ffffd6f970 RCX: dffffc0000000000 RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffff8880b8732aa8 RBP: ffffc90000a07960 R08: 0000000000000004 R09: 0000000000000004 R10: ffffe8ffffd6f994 R11: fffff91ffffadf34 R12: ffff8880b8732a28 R13: 000000000000000d R14: 000000000000002c R15: ffffffff819d7042 FS: 00007f60497a76c0(0000) GS:ffff888125d1c000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fc07b7ddf98 CR3: 0000000070b8e000 CR4: 00000000003526f0 DR0: 0000200000000300 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000600 Call Trace: __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:5879 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 arch_stack_walk+0x11c/0x150 arch/x86/kernel/stacktrace.c:25 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 poison_kmalloc_redzone mm/kasan/common.c:388 [inline] __kasan_kmalloc+0x93/0xb0 mm/kasan/common.c:405 kasan_kmalloc include/linux/kasan.h:260 [inline] __do_kmalloc_node mm/slub.c:4365 [inline] __kmalloc_noprof+0x27a/0x4f0 mm/slub.c:4377 kmalloc_noprof include/linux/slab.h:909 [inline] kzalloc_noprof include/linux/slab.h:1039 [inline] ieee802_11_parse_elems_full+0x152/0x2ab0 net/mac80211/parse.c:1011 ieee802_11_parse_elems_crc net/mac80211/ieee80211_i.h:2462 [inline] ieee802_11_parse_elems net/mac80211/ieee80211_i.h:2469 [inline] ieee80211_inform_bss+0x10c/0x10a0 net/mac80211/scan.c:79 rdev_inform_bss net/wireless/rdev-ops.h:418 [inline] cfg80211_inform_single_bss_data+0xd05/0x1ac0 net/wireless/scan.c:2379 cfg80211_inform_bss_data+0x1fb/0x3b30 net/wireless/scan.c:3234 cfg80211_inform_bss_frame_data+0x3d7/0x730 net/wireless/scan.c:3325 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:5186 [inline] ieee80211_rx_list+0x201c/0x2a90 net/mac80211/rx.c:5423 ieee80211_rx_napi+0x1a8/0x3d0 net/mac80211/rx.c:5446 ieee80211_rx include/net/mac80211.h:5210 [inline] ieee80211_handle_queued_frames+0xe8/0x1f0 net/mac80211/main.c:453 tasklet_action_common+0x369/0x580 kernel/softirq.c:829 handle_softirqs+0x283/0x870 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:__asan_memcpy+0x50/0x70 mm/kasan/shadow.c:109 Code: e3 ff ff 84 c0 74 2c 4c 89 ff 48 89 de ba 01 00 00 00 4c 89 e1 e8 80 e3 ff ff 84 c0 74 15 4c 89 ff 4c 89 f6 48 89 da 5b 41 5c <41> 5e 41 5f e9 57 34 56 09 31 c0 5b 41 5c 41 5e 41 5f c3 cc cc cc RSP: 0018:ffffc90019517b48 EFLAGS: 00000202 RAX: 0000000000000001 RBX: ffffe8ffffd68ec8 RCX: ffffffff819cab0a RDX: 0000000000000013 RSI: ffffffff8b8bd300 RDI: ffffe8ffffd68ee0 RBP: ffffc90019517c48 R08: ffffe8ffffd68ef2 R09: 1ffffd1ffffad1de R10: dffffc0000000000 R11: fffff91ffffad1df R12: ffff8880b8732a10 R13: 0000000000000014 R14: ffffffff8b8bd300 R15: ffffe8ffffd68ee0 do_perf_trace_lock include/trace/events/lock.h:50 [inline] perf_trace_lock+0x28a/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:5879 rcu_lock_release include/linux/rcupdate.h:341 [inline] rcu_read_unlock_sched include/linux/rcupdate.h:953 [inline] fd_install+0x2e6/0x540 fs/file.c:676 __do_sys_perf_event_open kernel/events/core.c:13731 [inline] __se_sys_perf_event_open+0x1acd/0x1d70 kernel/events/core.c:13353 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: 0033:0x7f604898ebe9 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:00007f60497a7038 EFLAGS: 00000246 ORIG_RAX: 000000000000012a RAX: ffffffffffffffda RBX: 00007f6048bb5fa0 RCX: 00007f604898ebe9 RDX: ffffffffffffffff RSI: 0000000000000000 RDI: 0000200000000480 RBP: 00007f6048a11e19 R08: 0000000000000000 R09: 0000000000000000 R10: ffffffffffffffff R11: 0000000000000246 R12: 0000000000000000 R13: 00007f6048bb6038 R14: 00007f6048bb5fa0 R15: 00007ffc97d682c8 Sending NMI from CPU 1 to CPUs 0: NMI backtrace for cpu 0 CPU: 0 UID: 0 PID: 18 Comm: rcu_exp_gp_kthr Not tainted syzkaller #0 PREEMPT(full) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/12/2025 RIP: 0010:lookup_chain_cache kernel/locking/lockdep.c:3802 [inline] RIP: 0010:lookup_chain_cache_add kernel/locking/lockdep.c:3821 [inline] RIP: 0010:validate_chain+0x1e1/0x2140 kernel/locking/lockdep.c:3876 Code: cc 48 ff cb f7 c1 00 60 00 00 74 c8 e9 8d 00 00 00 48 c7 c7 30 af 00 8e 4c 89 fe e8 a9 7d 61 03 48 8b 14 24 eb c9 48 8b 48 18 <4c> 39 f9 0f 84 b2 00 00 00 48 8b 40 08 48 85 c0 0f 84 c2 fe ff ff RSP: 0018:ffffc90000007bb8 EFLAGS: 00000046 RAX: ffffffff93a82110 RBX: 000000000007c792 RCX: 4d4df099ab2b819a RDX: 0000000000000000 RSI: ffff88801d2928f0 RDI: ffff88801d291e00 RBP: 0000000000000001 R08: 0000000000000000 R09: ffffffff81ada49a R10: dffffc0000000000 R11: ffffffff81ada3a0 R12: 0000000000000001 R13: ffff88801d2928f0 R14: ffff88801d2928f0 R15: 4d4df099ab2b819a FS: 0000000000000000(0000) GS:ffff888125c1c000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00005568ef43da30 CR3: 000000003149e000 CR4: 00000000003526f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000600 Call Trace: __lock_acquire+0xab9/0xd20 kernel/locking/lockdep.c:5237 lock_acquire+0x120/0x360 kernel/locking/lockdep.c:5868 __raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:110 [inline] _raw_spin_lock_irqsave+0xa7/0xf0 kernel/locking/spinlock.c:162 hrtimer_interrupt+0xfa/0xaa0 kernel/time/hrtimer.c:1868 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1039 [inline] __sysvec_apic_timer_interrupt+0x108/0x410 arch/x86/kernel/apic/apic.c:1056 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1050 [inline] sysvec_apic_timer_interrupt+0xa1/0xc0 arch/x86/kernel/apic/apic.c:1050 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702 RIP: 0010:console_trylock_spinning kernel/printk/printk.c:2061 [inline] RIP: 0010:vprintk_emit+0x58f/0x7a0 kernel/printk/printk.c:2449 Code: 85 32 01 00 00 e8 e1 86 1f 00 41 89 df 4d 85 f6 48 8b 1c 24 75 07 e8 d0 86 1f 00 eb 06 e8 c9 86 1f 00 fb 48 c7 c7 60 e1 12 8e <31> f6 ba 01 00 00 00 31 c9 41 b8 01 00 00 00 45 31 c9 53 e8 b9 35 RSP: 0018:ffffc900001778e0 EFLAGS: 00000293 RAX: ffffffff81a02587 RBX: ffffffff81a02444 RCX: ffff88801d291e00 RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffffffff8e12e160 RBP: ffffc900001779f0 R08: ffffffff8fa38037 R09: 1ffffffff1f47006 R10: dffffc0000000000 R11: fffffbfff1f47007 R12: dffffc0000000000 R13: 1ffff9200002ef20 R14: 0000000000000200 R15: 0000000000000041 _printk+0xcf/0x120 kernel/printk/printk.c:2475 synchronize_rcu_expedited_stall+0x61/0x1170 kernel/rcu/tree_exp.h:570 synchronize_rcu_expedited_wait kernel/rcu/tree_exp.h:668 [inline] rcu_exp_wait_wake kernel/rcu/tree_exp.h:687 [inline] rcu_exp_sel_wait_wake+0x867/0xe20 kernel/rcu/tree_exp.h:721 kthread_worker_fn+0x507/0xb60 kernel/kthread.c:1009 kthread+0x711/0x8a0 kernel/kthread.c:463 ret_from_fork+0x3f9/0x770 arch/x86/kernel/process.c:148 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245