syzbot

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WARNING: CPU: 0 PID: 4595 at net/mac80211/tx.c:4859 __ieee80211_beacon_update_cntdwn net/mac80211/tx.c:4859 [inline]
WARNING: CPU: 0 PID: 4595 at net/mac80211/tx.c:4859 __ieee80211_beacon_get+0x172c/0x1f80 net/mac80211/tx.c:5083
Modules linked in:
CPU: 0 PID: 4595 Comm: syz.3.58 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/02/2025
RIP: 0010:__ieee80211_beacon_update_cntdwn net/mac80211/tx.c:4859 [inline]
RIP: 0010:__ieee80211_beacon_get+0x172c/0x1f80 net/mac80211/tx.c:5083
Code: f8 0f 0b e9 f1 fa ff ff e8 01 51 3a f8 0f 0b 4c 8b 74 24 08 e9 36 fe ff ff e8 f0 50 3a f8 0f 0b e9 3c ef ff ff e8 e4 50 3a f8 <0f> 0b e9 b8 f2 ff ff e8 98 f2 6b 00 44 89 e1 80 e1 07 80 c1 03 38
RSP: 0018:ffffc900000078c0 EFLAGS: 00010246
RAX: ffffffff893d7b2c RBX: ffff88801f8d4c80 RCX: ffff88807bfd9dc0
RDX: 0000000000000100 RSI: 0000000000000000 RDI: 0000000000000000
RBP: ffffc90000007ae8 R08: ffff88807bfd9dc0 R09: 0000000000000003
R10: 0000000000000007 R11: 0000000000000100 R12: ffff888077626400
R13: dffffc0000000000 R14: 0000000000000000 R15: 1ffff92000000f28
FS:  00007f54bdb2c6c0(0000) GS:ffff8880b9000000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000200000167030 CR3: 000000001e759000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <IRQ>
 ieee80211_beacon_get_tim+0x48/0x840 net/mac80211/tx.c:5202
 ieee80211_beacon_get include/net/mac80211.h:4983 [inline]
 mac80211_hwsim_beacon_tx+0xf4/0x920 drivers/net/wireless/mac80211_hwsim.c:1812
 __iterate_interfaces+0x243/0x500 net/mac80211/util.c:793
 ieee80211_iterate_active_interfaces_atomic+0xb3/0x140 net/mac80211/util.c:829
 mac80211_hwsim_beacon+0x9b/0x180 drivers/net/wireless/mac80211_hwsim.c:1865
 __run_hrtimer kernel/time/hrtimer.c:1685 [inline]
 __hrtimer_run_queues+0x53d/0xc40 kernel/time/hrtimer.c:1749
 hrtimer_run_softirq+0x176/0x240 kernel/time/hrtimer.c:1766
 handle_softirqs+0x328/0x820 kernel/softirq.c:576
 __do_softirq kernel/softirq.c:610 [inline]
 invoke_softirq kernel/softirq.c:450 [inline]
 __irq_exit_rcu+0x12f/0x220 kernel/softirq.c:659
 irq_exit_rcu+0x5/0x20 kernel/softirq.c:671
 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1108 [inline]
 sysvec_apic_timer_interrupt+0xa0/0xc0 arch/x86/kernel/apic/apic.c:1108
 </IRQ>
 <TASK>
 asm_sysvec_apic_timer_interrupt+0x16/0x20 arch/x86/include/asm/idtentry.h:676
RIP: 0010:__sanitizer_cov_trace_pc+0x58/0x60 kernel/kcov.c:216
Code: 10 16 00 00 83 fa 02 75 21 48 8b 91 18 16 00 00 48 8b 32 48 8d 7e 01 8b 89 14 16 00 00 48 39 cf 73 08 48 89 44 f2 08 48 89 3a <c3> 0f 1f 80 00 00 00 00 48 8b 04 24 65 48 8b 0d 44 a3 8a 7e 65 8b
RSP: 0018:ffffc90002e7f720 EFLAGS: 00000293
RAX: ffffffff87d32959 RBX: 0000000000000000 RCX: ffff88807bfd9dc0
RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffff88807319da00
RBP: 0000000000000000 R08: dffffc0000000000 R09: fffffbfff1ff7c2f
R10: fffffbfff1ff7c2f R11: 1ffffffff1ff7c2e R12: dffffc0000000000
R13: ffffc90002e7fd40 R14: ffffc90002e7fd50 R15: ffff88807319da00
 skb_copy_datagram_iter+0x19/0x1f0 net/core/datagram.c:539
 skb_copy_datagram_msg include/linux/skbuff.h:3773 [inline]
 __unix_dgram_recvmsg+0x671/0xd50 net/unix/af_unix.c:2354
 ____sys_recvmsg+0x291/0x580 net/socket.c:-1
 ___sys_recvmsg+0x1af/0x4f0 net/socket.c:2707
 do_recvmmsg+0x344/0x7a0 net/socket.c:2801
 __sys_recvmmsg net/socket.c:2880 [inline]
 __do_sys_recvmmsg net/socket.c:2903 [inline]
 __se_sys_recvmmsg net/socket.c:2896 [inline]
 __x64_sys_recvmmsg+0x18d/0x240 net/socket.c:2896
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x66/0xd0
RIP: 0033:0x7f54be4ddfc9
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:00007f54bdb2c038 EFLAGS: 00000246 ORIG_RAX: 000000000000012b
RAX: ffffffffffffffda RBX: 00007f54be735090 RCX: 00007f54be4ddfc9
RDX: 0000000000010106 RSI: 00002000000000c0 RDI: 0000000000000003
RBP: 00007f54be560f91 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000002 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f54be735128 R14: 00007f54be735090 R15: 00007ffe38324568
 </TASK>
----------------
Code disassembly (best guess):
   0:	10 16                	adc    %dl,(%rsi)
   2:	00 00                	add    %al,(%rax)
   4:	83 fa 02             	cmp    $0x2,%edx
   7:	75 21                	jne    0x2a
   9:	48 8b 91 18 16 00 00 	mov    0x1618(%rcx),%rdx
  10:	48 8b 32             	mov    (%rdx),%rsi
  13:	48 8d 7e 01          	lea    0x1(%rsi),%rdi
  17:	8b 89 14 16 00 00    	mov    0x1614(%rcx),%ecx
  1d:	48 39 cf             	cmp    %rcx,%rdi
  20:	73 08                	jae    0x2a
  22:	48 89 44 f2 08       	mov    %rax,0x8(%rdx,%rsi,8)
  27:	48 89 3a             	mov    %rdi,(%rdx)
* 2a:	c3                   	ret <-- trapping instruction
  2b:	0f 1f 80 00 00 00 00 	nopl   0x0(%rax)
  32:	48 8b 04 24          	mov    (%rsp),%rax
  36:	65 48 8b 0d 44 a3 8a 	mov    %gs:0x7e8aa344(%rip),%rcx        # 0x7e8aa382
  3d:	7e
  3e:	65                   	gs
  3f:	8b                   	.byte 0x8b