------------[ cut here ]------------
WARNING: CPU: 0 PID: 4864 at net/mac80211/tx.c:4859 __ieee80211_beacon_update_cntdwn net/mac80211/tx.c:4859 [inline]
WARNING: CPU: 0 PID: 4864 at net/mac80211/tx.c:4859 __ieee80211_beacon_get+0x179f/0x2000 net/mac80211/tx.c:5083
Modules linked in:
CPU: 0 PID: 4864 Comm: syz.3.153 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/18/2026
RIP: 0010:__ieee80211_beacon_update_cntdwn net/mac80211/tx.c:4859 [inline]
RIP: 0010:__ieee80211_beacon_get+0x179f/0x2000 net/mac80211/tx.c:5083
Code: 2a f8 0f 0b 4f 89 64 2f 04 4f 89 64 2f 0c 43 c6 44 2f 14 f8 e9 19 fe ff ff e8 6d 09 2a f8 0f 0b e9 03 ef ff ff e8 61 09 2a f8 <0f> 0b e9 76 f2 ff ff e8 65 ae 6d 00 89 d9 80 e1 07 80 c1 03 38 c1
RSP: 0018:ffffc900000078e0 EFLAGS: 00010246
RAX: ffffffff894f2b2f RBX: ffff88805fb32268 RCX: ffff88801d8b1dc0
RDX: 0000000000000100 RSI: 0000000000000000 RDI: 0000000000000000
RBP: ffffc90000007b08 R08: ffff88801d8b1dc0 R09: 0000000000000003
R10: 0000000000000007 R11: 0000000000000100 R12: ffff888063bd4200
R13: dffffc0000000000 R14: 0000000000000000 R15: 1ffff92000000f2c
FS: 0000000000000000(0000) GS:ffff8880b9000000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f6f52b2c6b8 CR3: 0000000058f2b000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
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+0x4f2/0xb70 kernel/time/hrtimer.c:1749
hrtimer_run_softirq+0x176/0x240 kernel/time/hrtimer.c:1766
handle_softirqs+0x339/0x830 kernel/softirq.c:576
__do_softirq kernel/softirq.c:610 [inline]
invoke_softirq kernel/softirq.c:450 [inline]
__irq_exit_rcu+0x13b/0x230 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
asm_sysvec_apic_timer_interrupt+0x16/0x20 arch/x86/include/asm/idtentry.h:676
RIP: 0010:inode_to_bdi include/linux/backing-dev.h:150 [inline]
RIP: 0010:__generic_file_write_iter+0xdf/0x4e0 mm/filemap.c:3857
Code: 88 23 8a 8d e8 52 ba 1e 00 4c 3b 35 73 8a ea 0b 74 35 e8 74 9b d9 ff 49 81 c6 68 01 00 00 4c 89 f0 48 c1 e8 03 42 80 3c 38 00 <74> 08 4c 89 f7 e8 27 ba 1e 00 4d 8b 26 eb 5e e8 4d 9b d9 ff 49 c7
RSP: 0018:ffffc90003c8f1d0 EFLAGS: 00000246
RAX: 1ffff1100fbbd82d RBX: ffffc90003c8f300 RCX: ffff88801d8b1dc0
RDX: 0000000000000000 RSI: ffffc90003c8f350 RDI: ffffc90003c8f300
RBP: ffff888061ec9a08 R08: ffff888061ec9af7 R09: 1ffff1100c3d935e
R10: dffffc0000000000 R11: ffffed100c3d935f R12: ffffc90003c8f350
R13: ffff88807a50bb80 R14: ffff88807ddec168 R15: dffffc0000000000
generic_file_write_iter+0xa6/0x1b0 mm/filemap.c:3944
__kernel_write+0x51c/0x970 fs/read_write.c:539
__dump_emit+0x249/0x370 fs/coredump.c:943
dump_user_range+0x84/0x340 fs/coredump.c:1017
elf_core_dump+0x2fbd/0x3500 fs/binfmt_elf.c:2285
do_coredump+0x14c7/0x2ac0 fs/coredump.c:894
get_signal+0x40a/0x12c0 kernel/signal.c:2886
arch_do_signal_or_restart+0xe7/0x12c0 arch/x86/kernel/signal.c:867
handle_signal_work kernel/entry/common.c:154 [inline]
exit_to_user_mode_loop+0x9e/0x130 kernel/entry/common.c:178
exit_to_user_mode_prepare+0xee/0x180 kernel/entry/common.c:214
irqentry_exit_to_user_mode+0x5/0x30 kernel/entry/common.c:320
exc_page_fault+0x88/0x100 arch/x86/mm/fault.c:1499
asm_exc_page_fault+0x22/0x30 arch/x86/include/asm/idtentry.h:606
RIP: 0033:0x7f6f51c397f7
Code: e8 8e fa ff ff 89 f2 48 8d 3d 8d 40 1b 00 48 8d 35 6c fa 1d 00 31 c0 e8 e7 f8 ff ff 0f 1f 80 00 00 00 00 53 89 fb 48 83 ec 10 <64> 8b 04 25 a4 ff ff ff 85 c0 74 2a 89 fe 31 c0 bf 3c 00 00 00 e8
RSP: 002b:00007f6f4ffbe120 EFLAGS: 00010202
RAX: 0000000000000000 RBX: 000000000000000b RCX: 00007f6f51d83819
RDX: 00007f6f4ffbe140 RSI: 00007f6f4ffbe270 RDI: 000000000000000b
RBP: 00007f6f51e19c91 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000206 R12: 0000000000000000
R13: 00007f6f51ffd038 R14: 00007f6f51ffcfa0 R15: 00007ffd0c1869e8
----------------
Code disassembly (best guess), 3 bytes skipped:
0: 8d lea (bad),%ebp
1: e8 52 ba 1e 00 call 0x1eba58
6: 4c 3b 35 73 8a ea 0b cmp 0xbea8a73(%rip),%r14 # 0xbea8a80
d: 74 35 je 0x44
f: e8 74 9b d9 ff call 0xffd99b88
14: 49 81 c6 68 01 00 00 add $0x168,%r14
1b: 4c 89 f0 mov %r14,%rax
1e: 48 c1 e8 03 shr $0x3,%rax
22: 42 80 3c 38 00 cmpb $0x0,(%rax,%r15,1)
* 27: 74 08 je 0x31 <-- trapping instruction
29: 4c 89 f7 mov %r14,%rdi
2c: e8 27 ba 1e 00 call 0x1eba58
31: 4d 8b 26 mov (%r14),%r12
34: eb 5e jmp 0x94
36: e8 4d 9b d9 ff call 0xffd99b88
3b: 49 rex.WB
3c: c7 .byte 0xc7