------------[ cut here ]------------ WARNING: CPU: 0 PID: 6091 at net/mac80211/tx.c:5031 __ieee80211_beacon_update_cntdwn net/mac80211/tx.c:5031 [inline] WARNING: CPU: 0 PID: 6091 at net/mac80211/tx.c:5031 __ieee80211_beacon_get+0x1233/0x1600 net/mac80211/tx.c:5442 Modules linked in: CPU: 0 PID: 6091 Comm: syz.0.63 Not tainted syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/25/2025 RIP: 0010:__ieee80211_beacon_update_cntdwn net/mac80211/tx.c:5031 [inline] RIP: 0010:__ieee80211_beacon_get+0x1233/0x1600 net/mac80211/tx.c:5442 Code: 24 4c 89 e7 e8 5e 86 c2 f7 45 31 f6 4c 8b bc 24 a0 00 00 00 e9 7a fe ff ff e8 59 ce 84 f7 0f 0b e9 f6 f7 ff ff e8 4d ce 84 f7 <0f> 0b e9 48 fb ff ff e8 41 ce 84 f7 48 c7 c7 e0 4c 64 8e 4c 89 e6 RSP: 0018:ffffc90000007a18 EFLAGS: 00010246 RAX: ffffffff8a0244d3 RBX: ffffffff8a0232d6 RCX: ffff88802a07da00 RDX: 0000000000000100 RSI: 0000000000000000 RDI: 0000000000000000 RBP: 0000000000000000 R08: ffff88802a07da00 R09: 0000000000000003 R10: 0000000000000007 R11: 0000000000000100 R12: ffff88805cfea3c0 R13: dffffc0000000000 R14: ffff88805cfea8b0 R15: ffff88802b71f824 FS: 0000555593d75500(0000) GS:ffff8880b8e00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fa218be0ad8 CR3: 000000005c664000 CR4: 00000000003506f0 Call Trace: ieee80211_beacon_get_tim+0xbf/0x580 net/mac80211/tx.c:5569 ieee80211_beacon_get include/net/mac80211.h:5440 [inline] mac80211_hwsim_beacon_tx+0x3c7/0x780 drivers/net/wireless/virtual/mac80211_hwsim.c:2265 __iterate_interfaces+0x243/0x500 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:1750 [inline] __hrtimer_run_queues+0x52a/0xc40 kernel/time/hrtimer.c:1814 hrtimer_run_softirq+0x187/0x2b0 kernel/time/hrtimer.c:1831 handle_softirqs+0x280/0x820 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+0x26a/0x8f0 kernel/sched/core.c:5255 Code: 0f 84 33 01 00 00 48 85 db 0f 85 52 01 00 00 e9 de 04 00 00 4c 8b 75 d0 4c 89 e7 e8 50 52 30 09 e8 0b 21 30 00 fb 4c 8b 65 c0 <49> 8d bc 24 f8 15 00 00 48 89 f8 48 c1 e8 03 42 0f b6 04 28 84 c0 RSP: 0018:ffffc9000553f998 EFLAGS: 00000282 RAX: cc4419d847f72300 RBX: 0000000000000000 RCX: cc4419d847f72300 RDX: dffffc0000000000 RSI: ffffffff8acac900 RDI: ffffffff8b1c80e0 RBP: ffffc9000553f9f0 R08: ffffffff8e8ad9ef R09: 1ffffffff1d15b3d R10: dffffc0000000000 R11: fffffbfff1d15b3e R12: ffff88802a07da00 R13: dffffc0000000000 R14: ffff88802baa8000 R15: ffff8880b8e3cac8 context_switch kernel/sched/core.c:5384 [inline] __schedule+0x155b/0x45a0 kernel/sched/core.c:6700 schedule+0xbd/0x170 kernel/sched/core.c:6774 do_nanosleep+0x1ad/0x600 kernel/time/hrtimer.c:2091 hrtimer_nanosleep+0x175/0x370 kernel/time/hrtimer.c:2139 __do_sys_clock_nanosleep kernel/time/posix-timers.c:1397 [inline] __se_sys_clock_nanosleep+0x30f/0x3a0 kernel/time/posix-timers.c:1374 do_syscall_x64 arch/x86/entry/common.c:46 [inline] do_syscall_64+0x55/0xa0 arch/x86/entry/common.c:76 entry_SYSCALL_64_after_hwframe+0x68/0xd2 RIP: 0033:0x7fecc935b58e 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:00007fffaa80bd78 EFLAGS: 00000246 ORIG_RAX: 00000000000000e6 RAX: ffffffffffffffda RBX: 0000555593d75500 RCX: 00007fecc935b58e RDX: 00007fffaa80bdd0 RSI: 0000000000000000 RDI: 0000000000000000 RBP: 00007fecc9617da0 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 000000000001a7af R13: 00007fecc961618c R14: 000000000001a554 R15: 00007fecc9616180 ---------------- Code disassembly (best guess): 0: 0f 84 33 01 00 00 je 0x139 6: 48 85 db test %rbx,%rbx 9: 0f 85 52 01 00 00 jne 0x161 f: e9 de 04 00 00 jmp 0x4f2 14: 4c 8b 75 d0 mov -0x30(%rbp),%r14 18: 4c 89 e7 mov %r12,%rdi 1b: e8 50 52 30 09 call 0x9305270 20: e8 0b 21 30 00 call 0x302130 25: fb sti 26: 4c 8b 65 c0 mov -0x40(%rbp),%r12 * 2a: 49 8d bc 24 f8 15 00 lea 0x15f8(%r12),%rdi <-- trapping instruction 31: 00 32: 48 89 f8 mov %rdi,%rax 35: 48 c1 e8 03 shr $0x3,%rax 39: 42 0f b6 04 28 movzbl (%rax,%r13,1),%eax 3e: 84 c0 test %al,%al