------------[ cut here ]------------ WARNING: CPU: 0 PID: 9194 at net/mac80211/tx.c:5033 __ieee80211_beacon_update_cntdwn net/mac80211/tx.c:5033 [inline] WARNING: CPU: 0 PID: 9194 at net/mac80211/tx.c:5033 __ieee80211_beacon_get+0x1141/0x1520 net/mac80211/tx.c:5444 Modules linked in: CPU: 0 PID: 9194 Comm: syz.3.722 Not tainted syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/09/2026 RIP: 0010:__ieee80211_beacon_update_cntdwn net/mac80211/tx.c:5033 [inline] RIP: 0010:__ieee80211_beacon_get+0x1141/0x1520 net/mac80211/tx.c:5444 Code: f7 4c 89 ef e8 70 d3 ba f7 45 31 ed 4c 8b bc 24 a0 00 00 00 e9 7f fe ff ff e8 cb f1 7c f7 0f 0b e9 61 f8 ff ff e8 bf f1 7c f7 <0f> 0b e9 85 fb ff ff e8 b3 f1 7c f7 48 c7 c7 00 ae 65 8e 4c 89 e6 RSP: 0018:ffffc90000007a18 EFLAGS: 00010246 RAX: ffffffff8a09f3b1 RBX: dffffc0000000000 RCX: ffff888031fbda00 RDX: 0000000000000100 RSI: 0000000000000000 RDI: 0000000000000000 RBP: 0000000000000000 R08: ffff888031fbda00 R09: 0000000000000003 R10: 0000000000000007 R11: 0000000000000100 R12: ffff88805c962440 R13: ffff888030694c24 R14: ffff88805c962930 R15: ffff888030694c00 FS: 00007fbcd59d56c0(0000) GS:ffff8880b8e00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fbcd59b4d58 CR3: 000000007b9ba000 CR4: 00000000003506f0 Call Trace: ieee80211_beacon_get_tim+0xbf/0x580 net/mac80211/tx.c:5571 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:__sanitizer_cov_trace_const_cmp4+0x4/0x90 kernel/kcov.c:314 Code: 48 c7 44 11 08 03 00 00 00 48 89 7c 11 10 48 89 74 11 18 48 89 44 11 20 c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 00 f3 0f 1e fa <48> 8b 04 24 65 48 8b 15 10 cf 7c 7e 65 8b 0d 11 cf 7c 7e 81 e1 00 RSP: 0018:ffffc9000452fc78 EFLAGS: 00000206 RAX: ffffffff8876cff8 RBX: 0000000000000002 RCX: 0000000000080000 RDX: ffffc9000e960000 RSI: 0000000000000002 RDI: 00000000ffffffff RBP: ffffc9000452fe50 R08: ffffffff8e8c6b2f R09: 1ffffffff1d18d65 R10: dffffc0000000000 R11: fffffbfff1d18d66 R12: 00002000000000c0 R13: 0000000000000008 R14: 0000000000009e18 R15: 0000000000009e17 do_recvmmsg+0x340/0x810 net/socket.c:2941 __sys_recvmmsg net/socket.c:3029 [inline] __do_sys_recvmmsg net/socket.c:3052 [inline] __se_sys_recvmmsg net/socket.c:3045 [inline] __x64_sys_recvmmsg+0x199/0x250 net/socket.c:3045 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: 0033:0x7fbcd779de59 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:00007fbcd59d5028 EFLAGS: 00000246 ORIG_RAX: 000000000000012b RAX: ffffffffffffffda RBX: 00007fbcd7a26090 RCX: 00007fbcd779de59 RDX: 0000000000010106 RSI: 00002000000000c0 RDI: 0000000000000003 RBP: 00007fbcd7833e6f R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000002 R11: 0000000000000246 R12: 0000000000000000 R13: 00007fbcd7a26128 R14: 00007fbcd7a26090 R15: 00007ffcbdf17e48 ---------------- Code disassembly (best guess): 0: 48 c7 44 11 08 03 00 movq $0x3,0x8(%rcx,%rdx,1) 7: 00 00 9: 48 89 7c 11 10 mov %rdi,0x10(%rcx,%rdx,1) e: 48 89 74 11 18 mov %rsi,0x18(%rcx,%rdx,1) 13: 48 89 44 11 20 mov %rax,0x20(%rcx,%rdx,1) 18: c3 ret 19: 66 2e 0f 1f 84 00 00 cs nopw 0x0(%rax,%rax,1) 20: 00 00 00 23: 0f 1f 00 nopl (%rax) 26: f3 0f 1e fa endbr64 * 2a: 48 8b 04 24 mov (%rsp),%rax <-- trapping instruction 2e: 65 48 8b 15 10 cf 7c mov %gs:0x7e7ccf10(%rip),%rdx # 0x7e7ccf46 35: 7e 36: 65 8b 0d 11 cf 7c 7e mov %gs:0x7e7ccf11(%rip),%ecx # 0x7e7ccf4e 3d: 81 .byte 0x81 3e: e1 00 loope 0x40