------------[ cut here ]------------ WARNING: CPU: 1 PID: 6095 at net/mac80211/tx.c:5135 __ieee80211_beacon_update_cntdwn net/mac80211/tx.c:5135 [inline] WARNING: CPU: 1 PID: 6095 at net/mac80211/tx.c:5135 __ieee80211_beacon_get+0x1141/0x1520 net/mac80211/tx.c:5546 Modules linked in: CPU: 1 PID: 6095 Comm: syz.1.32 Not tainted syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 11/06/2026 RIP: 0010:__ieee80211_beacon_update_cntdwn net/mac80211/tx.c:5135 [inline] RIP: 0010:__ieee80211_beacon_get+0x1141/0x1520 net/mac80211/tx.c:5546 Code: f7 4c 89 ef e8 90 08 b1 f7 45 31 ed 4c 8b bc 24 a0 00 00 00 e9 7f fe ff ff e8 5b aa 72 f7 0f 0b e9 61 f8 ff ff e8 4f aa 72 f7 <0f> 0b e9 85 fb ff ff e8 43 aa 72 f7 48 c7 c7 a0 f3 66 8f 4c 89 e6 RSP: 0000:ffffc900001f0a18 EFLAGS: 00010246 RAX: ffffffff8a153451 RBX: dffffc0000000000 RCX: ffff88802c3cbc00 RDX: 0000000000000100 RSI: 0000000000000000 RDI: 0000000000000000 RBP: 0000000000000000 R08: ffff88802c3cbc00 R09: 0000000000000003 R10: 0000000000000007 R11: 0000000000000100 R12: ffff88805b74a420 R13: ffff88802de78824 R14: ffff88805b74a910 R15: ffff88802de78800 FS: 00007fc226ff66c0(0000) GS:ffff8880b8d00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000001b2ef1affc CR3: 000000001ff96000 CR4: 00000000003506e0 Call Trace: ieee80211_beacon_get_tim+0xbf/0x580 net/mac80211/tx.c:5673 ieee80211_beacon_get include/net/mac80211.h:5447 [inline] mac80211_hwsim_beacon_tx+0x3bd/0x770 drivers/net/wireless/virtual/mac80211_hwsim.c:2271 __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:2301 __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:check_kcov_mode kernel/kcov.c:178 [inline] RIP: 0010:write_comp_data kernel/kcov.c:241 [inline] RIP: 0010:__sanitizer_cov_trace_const_cmp8+0x17/0x80 kernel/kcov.c:316 Code: 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 0d 10 d5 7b 7e 65 8b 15 11 d5 7b 7e <81> e2 00 01 ff 00 74 11 81 fa 00 01 00 00 75 57 83 b9 24 16 00 00 RSP: 0000:ffffc90004fd78d8 EFLAGS: 00000246 RAX: ffffffff887f9bab RBX: 0000000000000000 RCX: ffff88802c3cbc00 RDX: 0000000080000000 RSI: 0000000000000000 RDI: 0000000000000000 RBP: ffffc90004fd7a70 R08: ffffc90004fd76a7 R09: 1ffff920009faed4 R10: dffffc0000000000 R11: fffff520009faed5 R12: 0000000000000002 R13: 0000000000000000 R14: 0000000000000000 R15: 00002000000d3e28 ____sys_recvmsg+0x44b/0x5d0 net/socket.c:2837 ___sys_recvmsg+0x214/0x590 net/socket.c:2856 do_recvmmsg+0x377/0x810 net/socket.c:2950 __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: 0033:0x7fc228d9fb19 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:00007fc226ff6028 EFLAGS: 00000246 ORIG_RAX: 000000000000012b RAX: ffffffffffffffda RBX: 00007fc229026090 RCX: 00007fc228d9fb19 RDX: 0000000000010106 RSI: 0000200000001000 RDI: 0000000000000003 RBP: 00007fc228e37b70 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000002 R11: 0000000000000246 R12: 0000000000000000 R13: 00007fc229026128 R14: 00007fc229026090 R15: 00007ffcc2774618 ---------------- Code disassembly (best guess): 0: 48 89 44 11 20 mov %rax,0x20(%rcx,%rdx,1) 5: c3 ret 6: 66 2e 0f 1f 84 00 00 cs nopw 0x0(%rax,%rax,1) d: 00 00 00 10: 0f 1f 00 nopl (%rax) 13: f3 0f 1e fa endbr64 17: 48 8b 04 24 mov (%rsp),%rax 1b: 65 48 8b 0d 10 d5 7b mov %gs:0x7e7bd510(%rip),%rcx # 0x7e7bd533 22: 7e 23: 65 8b 15 11 d5 7b 7e mov %gs:0x7e7bd511(%rip),%edx # 0x7e7bd53b * 2a: 81 e2 00 01 ff 00 and $0xff0100,%edx <-- trapping instruction 30: 74 11 je 0x43 32: 81 fa 00 01 00 00 cmp $0x100,%edx 38: 75 57 jne 0x91 3a: 83 .byte 0x83 3b: b9 24 16 00 00 mov $0x1624,%ecx