------------[ cut here ]------------ WARNING: CPU: 1 PID: 10344 at net/mac80211/tx.c:4944 __ieee80211_beacon_update_cntdwn net/mac80211/tx.c:4944 [inline] WARNING: CPU: 1 PID: 10344 at net/mac80211/tx.c:4944 __ieee80211_beacon_get+0x1952/0x1f50 net/mac80211/tx.c:5265 Modules linked in: CPU: 1 PID: 10344 Comm: syz.4.1339 Not tainted syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/12/2025 RIP: 0010:__ieee80211_beacon_update_cntdwn net/mac80211/tx.c:4944 [inline] RIP: 0010:__ieee80211_beacon_get+0x1952/0x1f50 net/mac80211/tx.c:5265 Code: ff ff ff e8 00 41 e4 f7 0f 0b 48 8b 7c 24 20 e8 44 ae 7f fe e9 dd e9 ff ff e8 ea 40 e4 f7 0f 0b e9 f1 ee ff ff e8 de 40 e4 f7 <0f> 0b e9 61 f2 ff ff e8 d2 40 e4 f7 48 c7 c7 f0 7a fa 8d 4c 89 f6 RSP: 0018:ffffc900001e08a0 EFLAGS: 00010246 RAX: ffffffff899c8f42 RBX: 0000000000000000 RCX: ffff88805679bb80 RDX: 0000000000000100 RSI: 0000000000000000 RDI: 0000000000000000 RBP: ffffc900001e0aa8 R08: ffff88805679bb80 R09: 0000000000000003 R10: 0000000000000007 R11: 0000000000000100 R12: 1ffff9200003c12c R13: dffffc0000000000 R14: ffff888024542258 R15: ffff88802e195c00 FS: 00007fee68be26c0(0000) GS:ffff8880b8f00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000020000019d030 CR3: 000000005fa42000 CR4: 00000000003506e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: ieee80211_beacon_get_tim+0x5b/0x4d0 net/mac80211/tx.c:5352 ieee80211_beacon_get include/net/mac80211.h:5264 [inline] mac80211_hwsim_beacon_tx+0x21c/0xae0 drivers/net/wireless/mac80211_hwsim.c:2091 __iterate_interfaces+0x243/0x500 net/mac80211/util.c:788 ieee80211_iterate_active_interfaces_atomic+0xd7/0x170 net/mac80211/util.c:824 mac80211_hwsim_beacon+0xb7/0x1b0 drivers/net/wireless/mac80211_hwsim.c:2147 __run_hrtimer kernel/time/hrtimer.c:1752 [inline] __hrtimer_run_queues+0x554/0xd60 kernel/time/hrtimer.c:1816 hrtimer_run_softirq+0x183/0x2a0 kernel/time/hrtimer.c:1833 handle_softirqs+0x2a1/0x920 kernel/softirq.c:596 __do_softirq kernel/softirq.c:630 [inline] invoke_softirq kernel/softirq.c:470 [inline] __irq_exit_rcu+0x12f/0x220 kernel/softirq.c:679 irq_exit_rcu+0x5/0x20 kernel/softirq.c:691 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1118 [inline] sysvec_apic_timer_interrupt+0xa0/0xc0 arch/x86/kernel/apic/apic.c:1118 asm_sysvec_apic_timer_interrupt+0x16/0x20 arch/x86/include/asm/idtentry.h:691 RIP: 0010:native_save_fl arch/x86/include/asm/irqflags.h:35 [inline] RIP: 0010:arch_local_save_flags arch/x86/include/asm/irqflags.h:70 [inline] RIP: 0010:arch_local_irq_save arch/x86/include/asm/irqflags.h:106 [inline] RIP: 0010:lock_release+0x155/0x910 kernel/locking/lockdep.c:5678 Code: 84 c0 0f 85 43 05 00 00 83 3b 00 0f 85 4e 04 00 00 4c 89 74 24 08 48 c7 84 24 a0 00 00 00 00 00 00 00 9c 8f 84 24 a0 00 00 00 <48> 8b 84 24 a0 00 00 00 48 89 44 24 50 fa 48 c7 c7 e0 0f 8c 8a e8 RSP: 0018:ffffc9000379f920 EFLAGS: 00000246 RAX: 0000000000000000 RBX: ffff88805679c65c RCX: 26d4b663c7e5e700 RDX: 0000000000000000 RSI: ffffffff8adefac0 RDI: ffffffff8adefa80 RBP: ffffc9000379fa40 R08: dffffc0000000000 R09: fffffbfff1c3ee26 R10: fffffbfff1c3ee26 R11: 1ffffffff1c3ee25 R12: 0000000000000002 R13: dffffc0000000000 R14: ffff88805679bb80 R15: 1ffff920006f3f30 _copy_from_user+0x27/0x170 lib/usercopy.c:14 copy_from_user include/linux/uaccess.h:161 [inline] copy_msghdr_from_user net/socket.c:2449 [inline] recvmsg_copy_msghdr net/socket.c:2704 [inline] ___sys_recvmsg+0x12b/0x510 net/socket.c:2776 do_recvmmsg+0x359/0x7d0 net/socket.c:2874 __sys_recvmmsg net/socket.c:2953 [inline] __do_sys_recvmmsg net/socket.c:2976 [inline] __se_sys_recvmmsg net/socket.c:2969 [inline] __x64_sys_recvmmsg+0x18d/0x240 net/socket.c:2969 do_syscall_x64 arch/x86/entry/common.c:51 [inline] do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:81 entry_SYSCALL_64_after_hwframe+0x68/0xd2 RIP: 0033:0x7fee67d8ebe9 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:00007fee68be2038 EFLAGS: 00000246 ORIG_RAX: 000000000000012b RAX: ffffffffffffffda RBX: 00007fee67fc6090 RCX: 00007fee67d8ebe9 RDX: 0000000000010106 RSI: 00002000000000c0 RDI: 0000000000000003 RBP: 00007fee67e11e19 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000002 R11: 0000000000000246 R12: 0000000000000000 R13: 00007fee67fc6128 R14: 00007fee67fc6090 R15: 00007ffe80fab728 ---------------- Code disassembly (best guess): 0: 84 c0 test %al,%al 2: 0f 85 43 05 00 00 jne 0x54b 8: 83 3b 00 cmpl $0x0,(%rbx) b: 0f 85 4e 04 00 00 jne 0x45f 11: 4c 89 74 24 08 mov %r14,0x8(%rsp) 16: 48 c7 84 24 a0 00 00 movq $0x0,0xa0(%rsp) 1d: 00 00 00 00 00 22: 9c pushf 23: 8f 84 24 a0 00 00 00 pop 0xa0(%rsp) * 2a: 48 8b 84 24 a0 00 00 mov 0xa0(%rsp),%rax <-- trapping instruction 31: 00 32: 48 89 44 24 50 mov %rax,0x50(%rsp) 37: fa cli 38: 48 c7 c7 e0 0f 8c 8a mov $0xffffffff8a8c0fe0,%rdi 3f: e8 .byte 0xe8