------------[ cut here ]------------ WARNING: CPU: 0 PID: 4616 at net/mac80211/tx.c:4946 __ieee80211_beacon_update_cntdwn net/mac80211/tx.c:4946 [inline] WARNING: CPU: 0 PID: 4616 at net/mac80211/tx.c:4946 __ieee80211_beacon_get+0x1233/0x1600 net/mac80211/tx.c:5347 Modules linked in: CPU: 0 PID: 4616 Comm: syz.2.47 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:4946 [inline] RIP: 0010:__ieee80211_beacon_get+0x1233/0x1600 net/mac80211/tx.c:5347 Code: 24 4c 89 e7 e8 6e b6 08 f8 45 31 f6 4c 8b bc 24 a0 00 00 00 e9 7a fe ff ff e8 59 1a d0 f7 0f 0b e9 f6 f7 ff ff e8 4d 1a d0 f7 <0f> 0b e9 48 fb ff ff e8 41 1a d0 f7 48 c7 c7 b0 24 fb 8d 4c 89 e6 RSP: 0018:ffffc90000007a30 EFLAGS: 00010246 RAX: ffffffff89b26153 RBX: ffffffff89b24f56 RCX: ffff88802d5d3c00 RDX: 0000000000000100 RSI: 0000000000000000 RDI: 0000000000000000 RBP: 0000000000000000 R08: ffff88802d5d3c00 R09: 0000000000000003 R10: 0000000000000007 R11: 0000000000000100 R12: ffff88805ceae228 R13: dffffc0000000000 R14: ffff88805ceae760 R15: ffff888017678424 FS: 00007f7968b1a6c0(0000) GS:ffff8880b8e00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00002000000c4030 CR3: 000000007ba3f000 CR4: 00000000003506f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: ieee80211_beacon_get_tim+0x63/0x4e0 net/mac80211/tx.c:5474 ieee80211_beacon_get include/net/mac80211.h:5335 [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:1751 [inline] __hrtimer_run_queues+0x54a/0xd50 kernel/time/hrtimer.c:1815 hrtimer_run_softirq+0x183/0x2a0 kernel/time/hrtimer.c:1832 handle_softirqs+0x2a1/0x930 kernel/softirq.c:596 __do_softirq kernel/softirq.c:630 [inline] invoke_softirq kernel/softirq.c:470 [inline] __irq_exit_rcu+0x13b/0x230 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:lock_acquire+0x225/0x4a0 kernel/locking/lockdep.c:5666 Code: f7 84 24 80 00 00 00 00 02 00 00 43 c6 44 3d 04 f8 0f 85 f0 00 00 00 41 f7 c6 00 02 00 00 74 01 fb 48 c7 44 24 60 0e 36 e0 45 <4b> c7 44 3d 00 00 00 00 00 43 c7 44 3d 08 00 00 00 00 65 48 8b 04 RSP: 0018:ffffc900038a7b20 EFLAGS: 00000206 RAX: 0000000000000001 RBX: 0000000000000000 RCX: 2ecf8044d6b53200 RDX: 0000000000000000 RSI: ffffffff8a8c2c20 RDI: ffffffff8adf2060 RBP: ffffc900038a7c30 R08: dffffc0000000000 R09: 1ffffffff215fe4e R10: dffffc0000000000 R11: fffffbfff215fe4f R12: 0000000000000000 R13: 1ffff92000714f70 R14: 0000000000000246 R15: dffffc0000000000 __might_fault+0xc2/0x120 mm/memory.c:5850 do_recvmmsg+0x3bc/0x870 net/socket.c:2879 __sys_recvmmsg net/socket.c:2952 [inline] __do_sys_recvmmsg net/socket.c:2975 [inline] __se_sys_recvmmsg net/socket.c:2968 [inline] __x64_sys_recvmmsg+0x195/0x250 net/socket.c:2968 do_syscall_x64 arch/x86/entry/common.c:46 [inline] do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:76 entry_SYSCALL_64_after_hwframe+0x68/0xd2 RIP: 0033:0x7f7967b9ce59 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:00007f7968b1a028 EFLAGS: 00000246 ORIG_RAX: 000000000000012b RAX: ffffffffffffffda RBX: 00007f7967e16090 RCX: 00007f7967b9ce59 RDX: 0000000000010106 RSI: 00002000000000c0 RDI: 0000000000000003 RBP: 00007f7967c32d6f R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000002 R11: 0000000000000246 R12: 0000000000000000 R13: 00007f7967e16128 R14: 00007f7967e16090 R15: 00007fff6b505ff8 ---------------- Code disassembly (best guess): 0: f7 84 24 80 00 00 00 testl $0x200,0x80(%rsp) 7: 00 02 00 00 b: 43 c6 44 3d 04 f8 movb $0xf8,0x4(%r13,%r15,1) 11: 0f 85 f0 00 00 00 jne 0x107 17: 41 f7 c6 00 02 00 00 test $0x200,%r14d 1e: 74 01 je 0x21 20: fb sti 21: 48 c7 44 24 60 0e 36 movq $0x45e0360e,0x60(%rsp) 28: e0 45 * 2a: 4b c7 44 3d 00 00 00 movq $0x0,0x0(%r13,%r15,1) <-- trapping instruction 31: 00 00 33: 43 c7 44 3d 08 00 00 movl $0x0,0x8(%r13,%r15,1) 3a: 00 00 3c: 65 gs 3d: 48 rex.W 3e: 8b .byte 0x8b 3f: 04 .byte 0x4