------------[ cut here ]------------
WARNING: CPU: 1 PID: 23243 at net/mac80211/tx.c:4944 __ieee80211_beacon_update_cntdwn net/mac80211/tx.c:4944 [inline]
WARNING: CPU: 1 PID: 23243 at net/mac80211/tx.c:4944 __ieee80211_beacon_get+0x1233/0x1600 net/mac80211/tx.c:5345
Modules linked in:
CPU: 1 PID: 23243 Comm: syz.4.4287 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/25/2025
RIP: 0010:__ieee80211_beacon_update_cntdwn net/mac80211/tx.c:4944 [inline]
RIP: 0010:__ieee80211_beacon_get+0x1233/0x1600 net/mac80211/tx.c:5345
Code: 24 4c 89 e7 e8 ae 73 0b f8 45 31 f6 4c 8b bc 24 a0 00 00 00 e9 7a fe ff ff e8 c9 dc d2 f7 0f 0b e9 f6 f7 ff ff e8 bd dc d2 f7 <0f> 0b e9 48 fb ff ff e8 b1 dc d2 f7 48 c7 c7 70 c2 fa 8d 4c 89 e6
RSP: 0000:ffffc900001e0a10 EFLAGS: 00010246
RAX: ffffffff89af95b3 RBX: ffffffff89af83b6 RCX: ffff88807a63bb80
RDX: 0000000000000100 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 0000000000000000 R08: ffff88807a63bb80 R09: 0000000000000003
R10: 0000000000000007 R11: 0000000000000100 R12: ffff88807387a258
R13: dffffc0000000000 R14: ffff88807387a790 R15: ffff8880673a5424
FS: 00007f0470d8a6c0(0000) GS:ffff8880b8f00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: fffffffffffffe70 CR3: 0000000078dd3000 CR4: 00000000003506e0
DR0: ffffffffffffffff DR1: 00000000000001f8 DR2: 0000000000000083
DR3: ffffffffefffff15 DR6: 00000000ffff0ff0 DR7: 0000000000000400
Call Trace:
ieee80211_beacon_get_tim+0x63/0x4e0 net/mac80211/tx.c:5472
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:1747 [inline]
__hrtimer_run_queues+0x560/0xd70 kernel/time/hrtimer.c:1811
hrtimer_run_softirq+0x183/0x2a0 kernel/time/hrtimer.c:1828
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:check_preemption_disabled+0x6/0x110 lib/smp_processor_id.c:13
Code: 89 f6 e8 1d 39 0c fa e9 6e ff ff ff 00 00 cc cc 00 00 cc cc 48 c7 c7 c0 0b df 8a 48 c7 c6 00 0c df 8a eb 00 55 41 57 41 56 53 <48> 83 ec 10 65 48 8b 04 25 28 00 00 00 48 89 44 24 08 65 8b 05 21
RSP: 0000:ffffc90003806cc8 EFLAGS: 00000282
RAX: 0000000000000001 RBX: 0000000000000000 RCX: ffff88807a63bb80
RDX: ffff88807a63bb80 RSI: ffffffff8adf0c00 RDI: ffffffff8adf0bc0
RBP: 0000000000000000 R08: dffffc0000000000 R09: 1ffffffff215e648
R10: dffffc0000000000 R11: fffffbfff215e649 R12: ffff888052cc5e42
R13: ffff88805db609d8 R14: 0000000000000153 R15: ffff888052d4f700
rcu_dynticks_curr_cpu_in_eqs include/linux/context_tracking.h:122 [inline]
rcu_is_watching+0x11/0xa0 kernel/rcu/tree.c:721
rcu_read_lock_held_common kernel/rcu/update.c:108 [inline]
rcu_read_lock_held+0x11/0x40 kernel/rcu/update.c:309
xa_entry include/linux/xarray.h:1198 [inline]
xas_descend+0x129/0x490 lib/xarray.c:204
xas_load+0xba/0x140 lib/xarray.c:242
mapping_get_entry mm/filemap.c:1881 [inline]
__filemap_get_folio+0x1da/0xdb0 mm/filemap.c:1943
shmem_get_folio_gfp+0x310/0x3400 mm/shmem.c:1881
shmem_get_folio mm/shmem.c:2072 [inline]
shmem_write_begin+0xee/0x3f0 mm/shmem.c:2556
generic_perform_write+0x2fa/0x5c0 mm/filemap.c:3862
__generic_file_write_iter+0x148/0x2a0 mm/filemap.c:3960
generic_file_write_iter+0xab/0x2e0 mm/filemap.c:3989
__kernel_write_iter+0x285/0x650 fs/read_write.c:517
dump_emit_page fs/coredump.c:950 [inline]
dump_user_range+0x412/0x850 fs/coredump.c:977
elf_core_dump+0x30a6/0x35d0 fs/binfmt_elf.c:2354
do_coredump+0x165b/0x22f0 fs/coredump.c:824
get_signal+0x10aa/0x1350 kernel/signal.c:2857
arch_do_signal_or_restart+0xc4/0x1350 arch/x86/kernel/signal.c:871
exit_to_user_mode_loop+0x70/0x110 kernel/entry/common.c:174
exit_to_user_mode_prepare+0xee/0x180 kernel/entry/common.c:210
irqentry_exit_to_user_mode+0x5/0x30 kernel/entry/common.c:316
exc_page_fault+0x88/0x100 arch/x86/mm/fault.c:1490
asm_exc_page_fault+0x22/0x30 arch/x86/include/asm/idtentry.h:608
RIP: 0033:0x7f046ff9aec1
Code: 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 48 c7 c1 e8 ff ff ff f7 d8 64 89 01 48 83 c8 ff c3 66 2e 0f 1f
RSP: 002b:fffffffffffffe70 EFLAGS: 00010217
RAX: 0000000000000000 RBX: 00007f0470215fa0 RCX: 00007f046ff9aeb9
RDX: 0000000000000000 RSI: fffffffffffffe70 RDI: 0000000000008000
RBP: 00007f0470008c1f R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000206 R12: 0000000000000000
R13: 00007f0470216038 R14: 00007f0470215fa0 R15: 00007ffe356d3e98
----------------
Code disassembly (best guess):
0: 89 f6 mov %esi,%esi
2: e8 1d 39 0c fa call 0xfa0c3924
7: e9 6e ff ff ff jmp 0xffffff7a
c: 00 00 add %al,(%rax)
e: cc int3
f: cc int3
10: 00 00 add %al,(%rax)
12: cc int3
13: cc int3
14: 48 c7 c7 c0 0b df 8a mov $0xffffffff8adf0bc0,%rdi
1b: 48 c7 c6 00 0c df 8a mov $0xffffffff8adf0c00,%rsi
22: eb 00 jmp 0x24
24: 55 push %rbp
25: 41 57 push %r15
27: 41 56 push %r14
29: 53 push %rbx
* 2a: 48 83 ec 10 sub $0x10,%rsp <-- trapping instruction
2e: 65 48 8b 04 25 28 00 mov %gs:0x28,%rax
35: 00 00
37: 48 89 44 24 08 mov %rax,0x8(%rsp)
3c: 65 gs
3d: 8b .byte 0x8b
3e: 05 .byte 0x5
3f: 21 .byte 0x21