Kernel panic - not syncing: kernel: panic_on_warn set ... CPU: 0 PID: 31077 Comm: syz.3.6503 Not tainted syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/24/2026 Call Trace: dump_stack_lvl+0x18c/0x250 lib/dump_stack.c:106 panic+0x2ca/0x720 kernel/panic.c:340 check_panic_on_warn kernel/panic.c:236 [inline] __warn+0x2e0/0x470 kernel/panic.c:681 __report_bug lib/bug.c:199 [inline] report_bug+0x2be/0x4f0 lib/bug.c:219 handle_bug+0xcf/0x120 arch/x86/kernel/traps.c:310 exc_invalid_op+0x1a/0x50 arch/x86/kernel/traps.c:345 asm_exc_invalid_op+0x1a/0x20 arch/x86/include/asm/idtentry.h:606 RIP: 0010:__ieee80211_beacon_update_cntdwn net/mac80211/tx.c:5048 [inline] RIP: 0010:__ieee80211_beacon_get+0x1141/0x1520 net/mac80211/tx.c:5459 Code: f7 4c 89 ef e8 70 5b ba f7 45 31 ed 4c 8b bc 24 a0 00 00 00 e9 7f fe ff ff e8 ab 6f 7c f7 0f 0b e9 61 f8 ff ff e8 9f 6f 7c f7 <0f> 0b e9 85 fb ff ff e8 93 6f 7c f7 48 c7 c7 60 bd 65 8e 4c 89 e6 RSP: 0018:ffffc90000007a18 EFLAGS: 00010246 RAX: ffffffff8a0b01e1 RBX: dffffc0000000000 RCX: ffff888043958000 RDX: 0000000000000100 RSI: 0000000000000000 RDI: 0000000000000000 RBP: 0000000000000000 R08: ffff888043958000 R09: 0000000000000003 R10: 0000000000000007 R11: 0000000000000100 R12: ffff88805cb6a440 R13: ffff8880302f1424 R14: ffff88805cb6a930 R15: ffff8880302f1400 ieee80211_beacon_get_tim+0xbf/0x580 net/mac80211/tx.c:5586 ieee80211_beacon_get include/net/mac80211.h:5440 [inline] mac80211_hwsim_beacon_tx+0x3bd/0x770 drivers/net/wireless/virtual/mac80211_hwsim.c:2265 __iterate_interfaces+0x225/0x4c0 net/mac80211/util.c:766 ieee80211_iterate_active_interfaces_atomic+0xdb/0x180 net/mac80211/util.c:802 mac80211_hwsim_beacon+0xbb/0x1b0 drivers/net/wireless/virtual/mac80211_hwsim.c:2295 __run_hrtimer kernel/time/hrtimer.c:1754 [inline] __hrtimer_run_queues+0x525/0xc10 kernel/time/hrtimer.c:1818 hrtimer_run_softirq+0x177/0x290 kernel/time/hrtimer.c:1835 handle_softirqs+0x27d/0x820 kernel/softirq.c:578 __do_softirq kernel/softirq.c:612 [inline] invoke_softirq kernel/softirq.c:452 [inline] __irq_exit_rcu+0xd3/0x190 kernel/softirq.c:661 irq_exit_rcu+0x9/0x20 kernel/softirq.c:673 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1088 [inline] sysvec_apic_timer_interrupt+0xa4/0xc0 arch/x86/kernel/apic/apic.c:1088 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:687 RIP: 0010:finish_task_switch+0x267/0x8f0 kernel/sched/core.c:5256 Code: 2f 09 85 c0 0f 84 30 01 00 00 48 85 db 0f 85 4f 01 00 00 e9 d5 04 00 00 4c 89 e7 e8 93 d0 38 09 e8 1e 19 30 00 fb 4c 8b 65 b8 <49> 8d bc 24 f8 15 00 00 48 89 f8 48 c1 e8 03 42 0f b6 04 30 84 c0 RSP: 0018:ffffc9000520f8a0 EFLAGS: 00000286 RAX: 278ad56567e36800 RBX: 0000000000000000 RCX: 278ad56567e36800 RDX: dffffc0000000000 RSI: ffffffff8acacbe0 RDI: ffffffff8b1d0ca0 RBP: ffffc9000520f8f0 R08: ffffffff8e8c7aef R09: 1ffffffff1d18f5d R10: dffffc0000000000 R11: fffffbfff1d18f5e R12: ffff888043958000 R13: ffff8880b8e3cfc8 R14: dffffc0000000000 R15: ffff8880b8e3cd48 context_switch kernel/sched/core.c:5385 [inline] __schedule+0x15b6/0x4660 kernel/sched/core.c:6701 preempt_schedule_irq+0xbf/0x150 kernel/sched/core.c:7011 irqentry_exit+0x67/0x70 kernel/entry/common.c:438 asm_sysvec_reschedule_ipi+0x1a/0x20 arch/x86/include/asm/idtentry.h:692 RIP: 0010:lock_release+0x594/0x8c0 kernel/locking/lockdep.c:5778 Code: 00 00 00 f7 84 24 80 00 00 00 00 02 00 00 43 c6 44 2f 04 f8 75 70 f7 44 24 50 00 02 00 00 74 01 fb 48 c7 44 24 60 0e 36 e0 45 <4b> c7 04 2f 00 00 00 00 43 c7 44 2f 08 00 00 00 00 65 48 8b 04 25 RSP: 0018:ffffc9000520fc80 EFLAGS: 00000206 RAX: 0000000000000001 RBX: ffffffffffffffff RCX: 278ad56567e36800 RDX: 0000000000000000 RSI: ffffffff8acadd60 RDI: ffffffff8b1d0ca0 RBP: ffffc9000520fd88 R08: ffffffff8e8c7aef R09: 1ffffffff1d18f5d R10: dffffc0000000000 R11: fffffbfff1d18f5e R12: ffff888043958ae0 R13: dffffc0000000000 R14: ffff888043958ad0 R15: 1ffff92000a41f9c _copy_from_user+0x2a/0xe0 lib/usercopy.c:14 copy_from_user include/linux/uaccess.h:183 [inline] get_timespec64+0x97/0x1b0 kernel/time/time.c:877 __do_sys_clock_nanosleep kernel/time/posix-timers.c:1386 [inline] __se_sys_clock_nanosleep+0x1c7/0x3a0 kernel/time/posix-timers.c:1374 do_syscall_x64 arch/x86/entry/common.c:46 [inline] do_syscall_64+0x55/0xb0 arch/x86/entry/common.c:76 entry_SYSCALL_64_after_hwframe+0x68/0xd2 RIP: 0033:0x7f611935e84e Code: 08 0f 85 a5 a8 ff ff 49 89 fb 48 89 f0 48 89 d7 48 89 ce 4c 89 c2 4d 89 ca 4c 8b 44 24 08 4c 8b 4c 24 10 4c 89 5c 24 08 0f 05 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 80 00 00 00 00 48 83 ec 08 RSP: 002b:00007ffd97da9fe8 EFLAGS: 00000246 ORIG_RAX: 00000000000000e6 RAX: ffffffffffffffda RBX: 000055555d560500 RCX: 00007f611935e84e RDX: 00007ffd97daa040 RSI: 0000000000000000 RDI: 0000000000000000 RBP: 00007f6119627da0 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 000000000024310c R13: 00007f611962618c R14: 0000000000242e84 R15: 00007f6119626180 Kernel Offset: disabled Rebooting in 86400 seconds.. ---------------- Code disassembly (best guess), 1 bytes skipped: 0: 09 85 c0 0f 84 30 or %eax,0x30840fc0(%rbp) 6: 01 00 add %eax,(%rax) 8: 00 48 85 add %cl,-0x7b(%rax) b: db 0f fisttpl (%rdi) d: 85 4f 01 test %ecx,0x1(%rdi) 10: 00 00 add %al,(%rax) 12: e9 d5 04 00 00 jmp 0x4ec 17: 4c 89 e7 mov %r12,%rdi 1a: e8 93 d0 38 09 call 0x938d0b2 1f: e8 1e 19 30 00 call 0x301942 24: fb sti 25: 4c 8b 65 b8 mov -0x48(%rbp),%r12 * 29: 49 8d bc 24 f8 15 00 lea 0x15f8(%r12),%rdi <-- trapping instruction 30: 00 31: 48 89 f8 mov %rdi,%rax 34: 48 c1 e8 03 shr $0x3,%rax 38: 42 0f b6 04 30 movzbl (%rax,%r14,1),%eax 3d: 84 c0 test %al,%al